JP3812530B2 - On-board equipment temperature rising device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide electric power supply structure capable of effectively supplying electric power to a temperature raising device for an in-vehicle instrument. <P>SOLUTION: The temperature raising device for the in-vehicle instrument makes an electric motor and an internal combustion engine 11 be drive sources, and is applied for a hybrid vehicle equipped with an inverter 17 with a converter which lowers output voltage of an HV battery 16 to DC14V and inputs it to an auxiliary machine and an auxiliary machine battery 23. When cooling water stored in a thermal storage tank 21 is supplied to the internal combustion engine 11 with an electric water pump 22 to raise the temperature of the engine 11, the water pump 22 is driven by the output voltage from the HV battery 16 lowered to DC14V through the inverter with the converter. When the cooling water is stored into the thermal storage tank 21 in accompany with the turning-off of an ignition switch, the water pump 22 is driven with DC12V from the auxiliary machine battery 23. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a temperature raising device for an in-vehicle device that raises the temperature of the in-vehicle device for an on-vehicle device such as an internal combustion engine or a functional component provided in the engine.
[0002]
[Prior art]
As is well known, at the time of so-called cold start in an internal combustion engine where the temperature of the engine is low, the combustion state of the air-fuel mixture becomes unstable due to deterioration of fuel vaporization and the like, leading to a reduction in emission performance. It becomes like this.
[0003]
Therefore, conventionally, in order to eliminate such a concern at the time of cold start, for example, Patent Document 1 proposes a temperature raising device for an in-vehicle device as follows.
In the temperature raising device described in Patent Document 1, immediately after the operation of the internal combustion engine is stopped, the coolant that circulates in the engine through the electric pump is stored in the heat accumulator, and at the subsequent cold start of the internal combustion engine, The high-temperature cooling water stored in the vessel is supplied to the engine. As a result, heat is transferred from the cooling water to the internal combustion engine and the engine is warmed up early, so that a good combustion state is ensured even during cold start. Incidentally, the process for warming up the internal combustion engine at an early stage is generally called preheating.
[0004]
In addition, as a prior art document concerning this invention, patent document 2 other than patent document 1 is mentioned.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-140644
[Patent Document 2]
Japanese Patent Laid-Open No. 2002-122061
[0006]
[Problems to be solved by the invention]
By the way, a vehicle having a plurality of power supplies having different output voltages has been put into practical use, such as a hybrid vehicle having a high voltage power source used for vehicle propulsion and a low voltage power source used for other purposes. However, an appropriate power supply structure for a temperature raising device for an in-vehicle device applied to such a vehicle has not been proposed yet, including Patent Document 1.
[0007]
The same applies to the temperature raising device for on-vehicle equipment intended to raise the temperature of various on-vehicle equipment including functional parts such as oxygen sensors, as well as the temperature raising device for on-vehicle equipment targeting internal combustion engines. Is in a situation.
[0008]
This invention is made | formed in view of such a situation, The objective is to provide the electric power supply structure which can supply electric power effectively with respect to the temperature rising apparatus of onboard equipment.
[0009]
[Means for Solving the Problems]
  In the following, means for achieving the above-mentioned purpose and the effects thereof are described..
[0017]
  Claim1The described inventionApplied to a vehicle having a plurality of power supplies having different output voltages, the temperature raising device for the vehicle-mounted device that raises the temperature of the vehicle-mounted device of the vehicle, wherein the temperature rising device for the vehicle-mounted device is stored in the regenerator. A heat storage device that raises the temperature of the internal combustion engine by supplying the heat medium that is being supplied to the internal combustion engine of the vehicle by an electric pump, and the electric pump is driven by a low-pressure power source among the plurality of power sources,The low-voltage power supply is one in which an output voltage from a high-voltage storage battery having an output voltage higher than the first voltage of the low-voltage power supply is stepped down by a transformer, and the heat medium is supplied to the on-vehicle equipment and the on-vehicle equipment When the temperature of the device is increased, the electric pump is driven by an output voltage from the high-voltage storage battery that is stepped down to a second voltage higher than the first voltage of the low-voltage power source through the transformer, When collecting the heat medium in the regenerator while collecting heat, the gist is to drive the electric pump with the low-voltage power source.
[0018]
According to the above configuration, when the heat medium is supplied to the vehicle-mounted device, the electric pump is driven by the output voltage from the high-voltage storage battery that is stepped down to the second voltage higher than the first voltage, and the heat medium is stored in the heat accumulator. When storing in the electric pump, the electric pump is driven by the low pressure power source. Incidentally, the heat transfer coefficient between the vehicle-mounted device and the heat medium tends to increase according to the flow rate of the heat medium. Therefore, as in the above configuration, when the heat of the heat medium is released to the vehicle-mounted device, the electric pump is driven with a higher discharge capacity, that is, the heat medium is circulated at a higher flow rate, so that the temperature of the vehicle-mounted device can be increased. A rise can be suitably achieved. On the other hand, when recovering the heat of the vehicle-mounted device through the heat medium, reducing the flow rate of the heat medium increases the time that the heat medium receives heat from the vehicle-mounted device, so it is possible to recover a lot of heat. Become. Therefore, as in the above configuration, when recovering heat through the heat medium, the electric pump is driven with a lower discharge capacity, i.e., the heat medium is circulated at a lower flow rate, thereby favorably recovering the high-temperature heat medium. It becomes possible to plan.
[0021]
  Claim2The invention described is a hybrid equipped with a transformer that includes an electric motor and an internal combustion engine as drive sources, and steps down the output voltage of a high-voltage storage battery that supplies power to the electric motor to a first voltage and inputs the voltage to an auxiliary machine. A heating device for an on-vehicle device that is applied to a vehicle and supplies a heat medium stored in a regenerator to the on-vehicle device of the hybrid vehicle by an electric pump to increase the temperature of the on-vehicle device. When the medium is supplied to the vehicle-mounted device to increase the temperature of the vehicle-mounted device, the electric pump is output with an output voltage from the high-voltage storage battery that is stepped down to a second voltage higher than the first voltage through the transformer. The electric pump is driven by the first voltage when the heat medium is stored in the heat accumulator while recovering the heat of the vehicle-mounted device through the heat medium.
[0022]
  According to the above configuration, when the heat medium is supplied to the vehicle-mounted device, the electric pump is driven by the output voltage from the high-voltage storage battery that is stepped down to the second voltage higher than the first voltage, and the heat medium is stored in the heat accumulator. When storing in the electric pump, the electric pump is driven by the first voltage. Even with such a configuration, the above claims1Effects according to the effects of the described invention can be obtained. In addition, it is possible to favorably increase the temperature of the vehicle-mounted device early and recover the high-temperature heat medium.
[0023]
  Claim3The described invention includes an electric motor and an internal combustion engine as a drive source, and includes a transformer that steps down an output voltage of a high voltage storage battery that supplies electric power to the electric motor to a first low voltage and inputs the voltage to an auxiliary machine. A temperature raising device for an in-vehicle device that is applied to a hybrid vehicle and supplies a heat medium stored in a regenerator to the in-vehicle device of the hybrid vehicle by an electric pump to raise the temperature of the in-vehicle device, When the heating medium is supplied to the vehicle-mounted device to increase the temperature of the vehicle-mounted device, the electric pump is driven at the first low voltage, and the heat medium is recovered while collecting the heat of the vehicle-mounted device through the heat medium. When the electric pump is stored in the regenerator, the electric pump is driven with an output voltage from the high-voltage storage battery that is stepped down to a second low voltage lower than the first low voltage through the transformer. Have
[0024]
  According to the above configuration, when supplying the heat medium to the vehicle-mounted device, the electric pump is driven by the first low voltage, and when storing the heat medium in the heat accumulator, the second lower than the first low voltage. The electric pump is driven by the output voltage from the high voltage storage battery that has been stepped down to a low voltage. Even with such a configuration, the above claims1Effects according to the effects of the described invention can be obtained. In addition, it is possible to favorably increase the temperature of the vehicle-mounted device early and recover the high-temperature heat medium.
[0025]
  Claim4In the described invention, an electric motor and an internal combustion engine are mounted as drive sources, and an output voltage of a high-voltage storage battery that supplies electric power to the electric motor is stepped down to a predetermined first voltage to be lower than the predetermined first voltage. The heat medium stored in the regenerator is applied to a hybrid vehicle including a transformer that inputs the second voltage of the second voltage to the low-voltage storage battery having the output voltage and inputs the predetermined first voltage to the auxiliary machine. A temperature raising device for an in-vehicle device that raises the temperature of the in-vehicle device by supplying it to the in-vehicle device of the hybrid vehicle by an electric pump, and increases the temperature of the in-vehicle device by supplying the heat medium to the in-vehicle device. At this time, the electric pump is driven by the output voltage from the high-voltage storage battery that has been stepped down to the predetermined first voltage, and the heat medium is stored in the heat accumulator while recovering the heat of the vehicle-mounted device through the heat medium. You When the predetermined first is the output voltage from the low-pressure accumulator2The gist is to drive the electric pump with voltage.
[0026]
  According to the above configuration, when supplying the heat medium to the vehicle-mounted device, the predetermined first2A predetermined second higher than the voltage1When the electric pump is driven by the output voltage from the high voltage storage battery that has been stepped down to a voltage, and the heat medium is stored in the regenerator, a predetermined first2The electric pump is driven by the voltage. Even with such a configuration, the above claims1Effects according to the effects of the described invention can be obtained. In addition, it is possible to favorably increase the temperature of the vehicle-mounted device early and recover the high-temperature heat medium.
[0033]
  Claim5The invention described in claims 1 to4The temperature rising device for an in-vehicle device according to any one of the above, the magnitude of the voltage input to the temperature raising device for the on-vehicle device is monitored, and the temperature rising when the magnitude of the monitored voltage is a predetermined value or more The gist of the invention is to provide a control means for permitting driving of the apparatus.
[0034]
According to the said structure, when the magnitude | size of the voltage input into the temperature rising apparatus of the said onboard equipment is more than predetermined value, the drive of the apparatus is permitted. Thereby, the drive capability of the said temperature rising apparatus can be ensured suitably.
[0035]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
1st Embodiment which actualized this invention as a temperature rising apparatus of the vehicle equipment applied to a hybrid vehicle is described with reference to FIGS.
[0036]
First, with reference to FIG. 1, the outline | summary is demonstrated about the hybrid vehicle carrying the temperature rising apparatus of the vehicle equipment according to the embodiment. FIG. 1 schematically shows the configuration of the power transmission system of the hybrid vehicle, in which power is transmitted along a path indicated by a one-dot chain line, and power is transmitted along a path indicated by a broken line. .
[0037]
As shown in FIG. 1, the hybrid vehicle 1 includes two types of power sources having different characteristics, that is, an internal combustion engine 11 (on-vehicle equipment) and an electric motor 12. The power of either one or both of the internal combustion engine 11 and the electric motor 12 is transmitted to the drive shaft 14 via the speed reducer 13 so that the wheel 15 is driven.
[0038]
While the internal combustion engine 11 is driven through the combustion of the air-fuel mixture, the electric motor 12 is driven by the electric power of the HV battery 16 (high voltage storage battery) having a high voltage being supplied via the inverter 17 with a converter.
[0039]
The power obtained by the internal combustion engine 11 is transmitted to the speed reducer 13 and the generator 19 via the power split mechanism 18, and the generator 19 generates power using the power obtained via the power split mechanism 18, and the converter 19 Electric power is supplied to the HV battery 16 via the attached inverter 17.
[0040]
Further, in the hybrid vehicle 1 of the present embodiment, the internal combustion engine 11 is configured to be warmed up through the heat storage device 2 (temperature raising device).
Next, the configuration of the heat storage device 2 together with the cooling water circulation system 3 for circulating the cooling water (heat medium) of the internal combustion engine 11 will be described with reference to FIG.
[0041]
In the cooling water circulation system 3, a mechanical water pump 31 having the internal combustion engine 11 as a drive source is connected to a first circulation path R1 provided on the exhaust port side of the internal combustion engine 11, and this first The circulation path R1 communicates with a second circulation path R2 provided on the intake port side of the internal combustion engine 11. The second circulation path R2 is provided with a heat storage tank 21 and an electric water pump (electric pump) 22 constituting the heat storage device 2, the third circulation path R3 provided with the heater core 33, in the three-port valve 32. Branches to the fourth circulation path R4.
[0042]
Each of these circulation paths R3, R4 is connected to the fifth circulation path R5, and the circulation path R5 is connected to the sixth circulation path R6 connected to the water pump 31 via the three-port valve 34 and the radiator. The path configuration is branched to a seventh circulation path R7 connected to the pump 31 via the 35 and 3 port valves 34.
[0043]
The electric system E of the hybrid vehicle 1 includes an HV battery 16, an inverter 17 with a converter, an auxiliary battery 23 (low voltage storage battery) charged through the HV battery 16, and the HV battery is connected to the water pump 22. 16 and the auxiliary battery 23 can be supplied with electric power.
[0044]
In the present embodiment, control of the driving mode of the water pump 22 and switching of the three-port valves 32 and 34 are performed through an electronic control unit (ECU) 5 constituting control means.
[0045]
Next, the circulation mode of the cooling water in the cooling water circulation system 3 having such a configuration will be described with reference to FIGS. 3 and 4. In the following, when the fourth circulation path R4 is inactive through the switching of the three-port valve 32, the third circulation path R3 is inactive through the switching of the first circulation path and the three-port valve 32. The route at the time of turning is the second circulation route. Incidentally, during the operation of the internal combustion engine 11, the cooling water is basically circulated through the first circulation path, and when the heat storage device 2 is driven as when the engine 11 is warmed up or immediately after the operation is stopped. The cooling water is circulated through the two circulation paths.
[0046]
First, with reference to FIG. 3, the circulation mode of the cooling water in the first circulation path will be described. In FIG. 3, a broken line indicates a state where the circulation of the cooling water is interrupted, and an arrow in each circulation path indicates the circulation direction of the cooling water.
[0047]
As shown in FIG. 3, the cooling water that is in the first circulation path and is pumped by the water pump 31 flows through the internal combustion engine 11 through the first circulation path R1 and the second circulation path R2. Thus, each part of the engine 11 is cooled.
[0048]
Then, after flowing into the fifth circulation path R5 via the heater core 33 of the third circulation path R3 via the three-port valve 32, either the sixth circulation path R6 or the seventh circulation path R7 is selected depending on the temperature of the cooling water. It flows into the crab. That is, when the temperature of the cooling water is lower than the predetermined temperature, it flows into the sixth circulation path R6 and is sucked into the water pump 31 via the three-port valve 34. On the other hand, when the temperature of the cooling water is equal to or higher than the predetermined temperature, it flows into the seventh circulation path R7 and is sucked into the water pump 31 via the radiator 35 and the three-port valve 34.
[0049]
Next, the circulation mode of the cooling water in the second circulation path will be described with reference to FIG. In FIG. 4, a broken line indicates a state where the circulation of the cooling water is interrupted, and an arrow in each circulation path indicates the circulation direction of the cooling water. Incidentally, since the second circulation path is an active path before the start of operation of the internal combustion engine 11 and immediately after the operation is stopped, the water pump 31 is stopped when the second circulation path is active. It is in.
[0050]
As shown in FIG. 4, the cooling water that is in the second circulation path and is pumped by the water pump 22 flows into the internal combustion engine 11 via the fourth circulation path R4. Then, the water flows through the sixth circulation path R6 (or the seventh circulation path R7) and the fifth circulation path R5 and is sucked into the water pump 22.
[0051]
Accordingly, when the cooling water is circulated through the second circulation path prior to starting the internal combustion engine 11, the heat of the cooling water stored in the heat storage tank 21 is released to the internal combustion engine 11. It becomes like this.
[0052]
Further, in the case where the cooling water is circulated through the second circulation path immediately after the operation of the internal combustion engine 11 is stopped, the cooling water that has absorbed the heat from the internal combustion engine 11 and is in a high temperature state is stored in the heat storage tank 21. It will be stored inside.
[0053]
Next, a detailed configuration of the electric system E of the hybrid vehicle 1 (within the broken line in FIG. 2) will be described with reference to FIG.
In this embodiment, the converter-equipped inverter 17 includes each element indicated by a broken line, that is, an inverter 17a, a DCDC converter 17b, and a converter control circuit 17c.
[0054]
Here, the inverter 17a converts the high-voltage direct current (DC288V in the present embodiment) from the HV battery 16 into a three-phase alternating current and supplies it to the electric motor 12, and the three-phase alternating current from the generator 19 is also supplied. The HV battery 16 is charged by converting into a direct current.
[0055]
The high voltage direct current from the HV battery 16 is converted into a low voltage direct current (DC14V (predetermined second voltage) in the present embodiment) by a DCDC converter 17b (transformer) controlled by a converter control circuit 17c. Then, it is input to the auxiliary battery 23 having the output voltage of the water pump 22 and DC12V (predetermined first voltage). As a result, the water pump 22 is driven by DC 14 V and the auxiliary battery 23 is charged. Incidentally, the low-voltage direct current (DC 14 V) from the DC-DC converter 17 b is also input to the auxiliary machine 24 mounted on the vehicle 1.
[0056]
Further, when the DCDC converter 17b is stopped and the water pump 22 is turned on, the output voltage (DC12V) from the auxiliary battery 23 is input to the water pump 22. That is, in the present embodiment, the drive voltage of the water pump 22 can be controlled through on / off of the DCDC converter 17b.
[0057]
Further, when the DCDC converter 17b is stopped, the auxiliary machine 24 is also driven by the output voltage (DC12V) from the auxiliary battery 23. Incidentally, the output voltage (DC12V) of the auxiliary battery 23 is monitored by the converter control circuit 17c, and is controlled so that the terminal voltage of the auxiliary battery 23 is always constant.
[0058]
In the present embodiment, the low-voltage power source includes the HV battery 16, the converter-equipped inverter 17, and the auxiliary battery 23.
On the other hand, the ECU 5 receives an ignition signal exIG indicating that the ignition switch IG is in the “on” position, and a starter signal exSTA sent from the starter motor STA when the switch IG is switched to the “start” position. Is done. Then, the ECU 5 switches the converter 17b on / off by controlling the converter control circuit 17c based on the starter signal history exSTAf indicating that the ignition signal exIG and the starter signal exSTA are input. Note that the converter control circuit 17c basically starts driving when the ignition switch IG is set to the “ON” position.
[0059]
Next, the preheating process performed in order to achieve early completion of warm-up of the internal combustion engine 11 will be described with reference to FIGS. 6 and 7. This process is repeatedly executed every predetermined cycle (for example, a predetermined time).
[0060]
As shown in FIGS. 6 and 7, in this process, it is first determined whether or not the ignition signal exIG is on (step S101). That is, the following conditions
exIG = 1
Whether or not is satisfied is determined. The subsequent processing (steps S102 to S108) performed when the ignition signal exIG is ON supplies the cooling water stored in the heat storage tank 21 to the internal combustion engine 11 to warm up the engine 11. It is performed as a process for completing at an early stage. On the other hand, the subsequent processing (steps S109 to S112) performed when the ignition signal exIG is off absorbs heat from the internal combustion engine 11 and stores cooling water in a high temperature state in the heat storage tank 21. As done.
[0061]
First, processing that is performed when the ignition signal exIG is on will be described.
When the ignition signal exIG is on (step S101: Yes), the converter-equipped inverter 17 is driven (step S102).
[0062]
Next, it is determined whether the starter signal history exSTAf indicating that the starter motor STA is driven is on (step S103). That is, the following conditions
exSTAf = 1
Whether or not is satisfied is determined. Incidentally, the starter signal history exSTAf is cleared when the ignition signal exIG is turned off.
[0063]
When the starter signal history exSTAf is on (step S103: Yes), it is determined whether or not the output voltage Vcn from the DCDC converter 17b is equal to or higher than DC14V (step S104). That is, the following conditions
Vcn ≧ DC14V
Whether or not is satisfied is determined.
[0064]
When the output voltage Vcn from the DCDC converter 17b is DC14V or more (step S104: Yes), it is determined whether or not a condition for performing preheating is satisfied (step S105). In the present embodiment, it is assumed that the condition for performing the preheating is “the temperature of the cooling water on the outlet side of the heat storage tank 21 is equal to or higher than a predetermined temperature”.
[0065]
When the condition for performing the preheating is satisfied (step S105: Yes), it is determined whether or not the elapsed time Ts from the start of the driving of the water pump 22 is less than the predetermined time Tsx (step S106). ). That is, the following conditions
Tsx> Ts
Whether or not is satisfied is determined. When the determination conditions in steps S103 to S105 are not satisfied, the driving of the water pump 22 is stopped and the present process is temporarily ended (step S108).
[0066]
When the elapsed time Ts is less than the predetermined time Tsx (step S106: Yes), the water pump 22 is driven to end this process once (step S107). When driving of the water pump 22 is started, the second circulation path (FIG. 4) in the cooling water circulation system 3 is activated through a separate process performed through the ECU 5.
[0067]
Then, when the elapsed time Ts exceeds the predetermined time Tsx (step S106: No), the water pump 22 is stopped and the process is temporarily ended (step S108). Further, when the water pump 22 is stopped, the operation of the internal combustion engine 11 is started.
[0068]
Next, processing performed when the ignition signal exIG is off will be described.
When the ignition signal exIG is off (step S101: No), the converter-equipped inverter 17 is stopped (step S109).
[0069]
Next, it is determined whether or not an elapsed time Te after the ignition signal exIG is turned off is less than a predetermined time Tex (step S110). That is, the following conditions
Tex> Te
Whether or not is satisfied is determined.
[0070]
When the elapsed time Te is less than the predetermined time Tex (step S110: Yes), the water pump 22 is driven to end this process once (step S111). When driving of the water pump 22 is started, the second circulation path (FIG. 4) in the cooling water circulation system 3 is activated through the separate processing.
[0071]
And when elapsed time Te exceeds predetermined time Tex (step S110: No), the water pump 22 is stopped and this process is complete | finished (step S112).
[0072]
Next, operational effects achieved through the preheating process will be described.
In the present embodiment, when the high-temperature cooling water is supplied to the internal combustion engine 11 prior to starting the internal combustion engine 11, the water pump 22 is connected to the DCDC converter 17b higher than the output voltage (DC12V) of the auxiliary battery 23. It is made to drive with output voltage (DC14V). Thereby, since the cooling water is circulated in a state where the heat transfer coefficient between the internal combustion engine 11 and the cooling water is larger, the warm-up of the engine 11 can be completed early.
[0073]
Further, in the present embodiment, when the heat of the internal combustion engine 11 is recovered through the cooling water immediately after the operation of the hybrid vehicle 1 is stopped, the output voltage (DC12V) of the auxiliary battery 23 that is lower than the output voltage (DC14V) of the DCDC converter 17b. ) To drive the water pump 22. As a result, heat is recovered from the internal combustion engine 11 in a state where the flow rate of the cooling water is smaller, so that the high-temperature cooling water can be stored in the heat storage tank 21.
[0074]
In this embodiment, the control of the voltage applied to the water pump 22, that is, the adjustment of the flow rate of the cooling water through the on / off of the DCDC converter 17b is realized, so that the configuration of the entire apparatus is complicated. It can be preferably avoided.
[0075]
Next, an example of a driving mode of the water pump 22 by the preheating process (FIGS. 6 and 7) will be described with reference to FIG.
For example, if the ignition switch IG is switched to the “on” position at time t81 and it is detected that the ignition signal exIG is turned on, the drive of the inverter 17 with the converter is started when the ignition signal exIG is turned on. (FIG. 8 (a), (b)).
[0076]
Even when it is detected at time t82 that the ignition switch IG is switched to the “start” position and the starter signal history exSTAf is turned on, it is detected that the output voltage Vcn from the DCDC converter 17b is equal to or higher than DC14V. Until the water pump 22 starts to be driven (FIGS. 8C to 8F).
[0077]
Then, at time t83, if it is detected that the conditions “starter signal history exSTAf is on”, “the output voltage Vcn of the DCDC converter 17b is DC14V or higher”, and “the preheat condition is satisfied” are satisfied, The driving of the pump 22 is started (FIGS. 8C to 8F).
[0078]
Then, between time t83 and time t84 when the predetermined time Tsx elapses, DC14V is input to the water pump 22 and the internal combustion engine 11 is preheated (FIGS. 8 (f) and (g)). Incidentally, when this preheating is completed, the operation of the internal combustion engine 11 is started.
[0079]
If it is detected that the operation of the hybrid vehicle 1 is stopped and the ignition signal exIG is turned off at time t85, the converter-equipped inverter 17 is stopped and the water pump 22 is started to be driven (FIG. 8). (A), (b), (f)).
[0080]
And from this time t85 to the time t86 when the predetermined time Tex elapses, the water pump 22 is driven by DC12V by the auxiliary battery 23 and the cooling water is stored in the heat storage tank 21. If it is detected at time t86 that the water pump 22 has been driven for a predetermined time Tex, the driving of the pump 22 is stopped (FIGS. 8F and 8G).
[0081]
As described above in detail, according to the temperature raising device for the vehicle-mounted device according to the first embodiment, the excellent effects listed below can be obtained.
(1) In the present embodiment, the HV battery 16, the inverter 17 with converter, and the auxiliary battery 23 are used as the power source of the heat storage device 2. Thereby, electric power can be effectively supplied to the heat storage device 2.
[0082]
(2) Moreover, since the power supply of the said temperature rising apparatus is comprised using the equipment with which the hybrid vehicle 1 is equipped, while the apparatus can be implement | achieved with a simple structure, An increase in cost is suitably suppressed.
[0083]
(3) In the present embodiment, prior to starting the internal combustion engine 11, the water pump 22 is driven by the output voltage (DC14V) of the DCDC converter 17b, which is higher than the output voltage (DC12V) of the auxiliary battery 23. I try to circulate. Thereby, since the cooling water is circulated in a state where the heat transfer coefficient between the internal combustion engine 11 and the cooling water is larger, the warm-up of the engine 11 can be completed early.
[0084]
(4) In the present embodiment, immediately after the operation of the hybrid vehicle 1 is stopped, the water pump 22 is driven by the output voltage (DC12V) of the auxiliary battery 23 that is lower than the output voltage (DC14V) of the DCDC converter 17b. The heat is stored in the heat storage tank 21. As a result, heat is recovered from the internal combustion engine 11 in a state where the flow rate of the cooling water is smaller, so that the high-temperature cooling water can be stored in the heat storage tank 21.
[0085]
(5) In this embodiment, the voltage input to the water pump 22 is switched to either DC14V or DC12V through on / off of the DCDC converter 17b. That is, the discharge amount (cooling water flow rate) of the cooling water by the water pump 22 can be changed through on / off of the DCDC converter 17b. Accordingly, for example, the flow rate of the cooling water can be adjusted even if the heat storage device 2 is not provided with an electric circuit for controlling the rotation speed of the water pump 22, so that the configuration of the device is preferably prevented from being complicated. Will come to be.
[0086]
(6) In the present embodiment, since the HV battery 16, DCDC converter 17b and auxiliary battery 23 mounted on the hybrid vehicle 1 are diverted to perform voltage control of the water pump 22, the heat storage The apparatus 2 can be easily realized.
[0087]
(7) In the present embodiment, the output voltage of the DCDC converter 17b is monitored, and the water pump 22 is driven when the monitored output voltage is DC14V or higher. Thereby, since the water pump 22 is driven at DC14V or more, the internal combustion engine 11 can be warmed up more quickly.
[0088]
(8) In the present embodiment, immediately after the operation of the hybrid vehicle 1 is stopped, the water pump 22 is driven for a predetermined time Tex to store the cooling water in the heat storage tank 21. As described above, since the water pump 22 is driven for a preset time, it is possible to suitably avoid complication of processing for storing the cooling water.
[0089]
Note that the first embodiment can be implemented as, for example, the following form, which is appropriately changed.
In the first embodiment, the water pump 22 is driven for a predetermined time Tsx when it is determined that the conditions for preheating are satisfied (FIG. 6: Steps S105 to S107). ), For example, can be changed as follows. That is, when it is determined that the conditions for preheating are satisfied, the water pump 22 can be driven until the temperature of the cooling water in the internal combustion engine 11 becomes equal to or higher than a predetermined temperature.
[0090]
In the first embodiment, when the output voltage Vcn of the DCDC converter 17b is less than DC14V, the driving of the water pump 22 is not started (FIG. 6: Steps S104 and S108). For example, as follows It is also possible to change. That is, even when the output voltage Vcn of the DCDC converter 17b is less than DC14V, it is estimated that the internal combustion engine 11 is sufficiently warmed up by driving the water pump 22 with the output voltage (DC12V) of the auxiliary battery 23. In this case, the pump 22 may be driven.
[0091]
-In the said 1st Embodiment, although the electrical system E of the structure shown by FIG. 5 was assumed, the structure of the electrical system E is not restricted to the structure illustrated by the same FIG. 5, Arbitrary structures are employable. it can.
[0092]
In the first embodiment, the voltage input to the water pump 22 and the auxiliary device 24 through the DCDC converter 17b is assumed to be DC 14V. However, a voltage other than DC 14V is applied to the pump 22 and the auxiliary device 24 (however, The output voltage of the auxiliary battery 23 may be larger).
[0093]
In the first embodiment, the preheat process (FIGS. 6 and 7) is configured to determine whether or not the output voltage Vcn from the DCDC converter 17b is equal to or higher than DC14V (FIG. 6: Step S104). ), And the preheating process can be performed by omitting the determination process.
[0094]
In the first embodiment, the water pump 22 is driven by the output voltage (DC14V) of the DCDC converter 17b prior to the start of the internal combustion engine 11, and the output voltage of the auxiliary battery 23 ( Although the water pump 22 is driven by DC 12V), for example, it can be changed as follows.
[A] When the water pump 22 is driven before the internal combustion engine 11 is started and immediately after the operation is stopped, the output from the HV battery 16 which is stepped down to, for example, DC 14 V (predetermined voltage) by the DCDC converter 17b. The pump 22 may be driven with voltage. In this case, the output voltage (predetermined voltage) from the stepped-down HV battery 16 can also be applied to the auxiliary machine 24.
[B] Before starting the internal combustion engine 11, the water pump 22 is driven by the output voltage from the HV battery 16 stepped down to, for example, DC14V (second voltage) by the DCDC converter 17b. The water pump 22 may be driven by the output voltage from the HV battery 16 that has been stepped down to less than DC14V (for example, DC12V (first voltage)) by the converter 17b. In this case, the output voltage (first voltage) from the stepped-down HV battery 16 can also be applied to the auxiliary machine 24.
[C] Before starting the internal combustion engine 11, the water pump 22 is driven by the output voltage from the HV battery 16 that is stepped down to, for example, DC 14 V (first low voltage) by the DCDC converter 17 b, and immediately after the operation of the engine 11 is stopped. The water pump 22 may be driven by the output voltage from the HV battery 16 that has been stepped down to less than DC14V (for example, DC12V (second low voltage)) by the DCDC converter 17b. In this case, the output voltage (first low voltage) from the stepped down HV battery 16 can also be applied to the auxiliary machine 24.
[0095]
In the first embodiment, it is assumed that the HV battery 16 having the output voltage DC288V is used, but a battery having an arbitrary output voltage can be adopted as the HV battery.
[0096]
In the first embodiment, it is assumed that the auxiliary battery 23 having the output voltage DC12V is used. However, an auxiliary battery having an arbitrary output voltage can be used. In short, any auxiliary battery can be used as long as the battery has an output voltage lower than the voltage input to the water pump 22 through the DCDC converter 17b.
[0097]
In the first embodiment, the present invention is applied to the heat storage device 2 that warms up the internal combustion engine 11 mounted on the hybrid vehicle 1, but the internal combustion engine mounted on a vehicle other than the hybrid vehicle The present invention can also be applied to a heat storage device that performs warm-up.
[0098]
(Second Embodiment)
A second embodiment in which the present invention is embodied as a temperature raising device for a vehicle-mounted device mounted on a hybrid vehicle will be described with reference to FIGS.
[0099]
The configuration of the hybrid vehicle equipped with the temperature raising device for the vehicle-mounted device according to the present embodiment is basically the same as that of the first embodiment (FIG. 1).
And while the temperature raising device for the vehicle-mounted device in the first embodiment is the heat storage device 2 for warming up the internal combustion engine 11, the temperature rising device for the vehicle-mounted device in the present embodiment is the internal combustion engine 11. It is a heater that warms up the oxygen sensor (on-vehicle equipment) provided in the vehicle. That is, the configuration of the hybrid vehicle 1 in the present embodiment is a configuration in which the heat storage device 2 in FIG. 1 is changed to a heater of an oxygen sensor.
[0100]
First, with reference to FIG. 9, the structure of the temperature rising apparatus of the vehicle equipment in this Embodiment is demonstrated. FIG. 9 schematically shows a part of the configuration of the hybrid vehicle 1.
[0101]
As shown in FIG. 9, the internal combustion engine 11 is provided with an oxygen sensor 61 for detecting the oxygen concentration in the exhaust passage (not shown) of the engine 11, and the detection data of the sensor 61 is input to the ECU 5. Is done.
[0102]
The hybrid vehicle 1 of the present embodiment is provided with a heater 6 (temperature raising device) for warming up the oxygen sensor 61, and the heater 6 is turned on / off through the ECU 5. ing. The electric system E includes an HV battery 16, an inverter 17 with a converter, and an auxiliary battery 23 that is charged through the HV battery 16. The heater 6 is connected to either the HV battery 16 or the auxiliary battery 23. It is possible to supply power.
[0103]
Next, a detailed configuration of the electric system E of the hybrid vehicle 1 (within the broken line in FIG. 9) will be described with reference to FIG.
In this embodiment, the converter-equipped inverter 17 includes each element indicated by a broken line, that is, an inverter 17a, a DCDC converter 17b, and a converter control circuit 17c.
[0104]
Here, the inverter 17a converts the high-voltage direct current (DC288V in the present embodiment) from the HV battery 16 into a three-phase alternating current and supplies it to the electric motor 12, and the three-phase alternating current from the generator 19 is also supplied. The HV battery 16 is charged by converting into a direct current.
[0105]
The high voltage direct current from the HV battery 16 is converted into a low voltage direct current (DC14V (predetermined second voltage) in the present embodiment) by a DCDC converter 17b (transformer) controlled by a converter control circuit 17c. Then, the heater 6 and DC 12V (predetermined first voltage) are input to the auxiliary battery 23 having the output voltage. As a result, the heater 6 is driven by DC 14 V and the auxiliary battery 23 is charged. Incidentally, the low-voltage direct current (DC 14 V) from the DC-DC converter 17 b is also input to the auxiliary machine 24 mounted on the vehicle 1.
[0106]
Further, when the DCDC converter 17b is stopped and the heater 6 is turned on, the output voltage (DC12V) from the auxiliary battery 23 is input to the heater 6. That is, in the present embodiment, the drive voltage of the heater 6 can be controlled through the on / off of the DCDC converter 17b.
[0107]
Further, when the DCDC converter 17b is stopped, the auxiliary machine 24 is also driven by the output voltage (DC12V) from the auxiliary battery 23. Incidentally, the output voltage (DC12V) of the auxiliary battery 23 is monitored by the converter control circuit 17c, and is controlled so that the terminal voltage of the auxiliary battery 23 is always constant.
[0108]
In the present embodiment, the low-voltage power source includes the HV battery 16, the converter-equipped inverter 17, and the auxiliary battery 23.
On the other hand, the ECU 5 receives an ignition signal exIG indicating that the ignition switch IG is in the “on” position, and a starter signal exSTA sent from the starter motor STA when the switch IG is switched to the “start” position. Is done. Then, the ECU 5 switches the converter 17b on / off by controlling the converter control circuit 17c based on the starter signal history exSTAf indicating that the ignition signal exIG and the starter signal exSTA are input. Note that the converter control circuit 17c basically starts driving when the ignition switch IG is set to the “ON” position.
[0109]
Next, the preheating process performed in order to achieve early completion of warm-up of the oxygen sensor 61 will be described with reference to FIG. This process is repeatedly executed every predetermined cycle (for example, a predetermined time).
[0110]
As shown in FIG. 11, in this process, it is first determined whether or not the ignition signal exIG is on (step S201).
When the ignition signal exIG is on (step S201: Yes), processing according to steps S102 to S105 of the preheating process (FIGS. 6 and 7) in the first embodiment is performed. In the present embodiment, it is assumed that the condition for preheating is “the temperature of the oxygen sensor 61 is lower than a predetermined temperature”.
[0111]
And after performing the said process, it is determined whether the elapsed time Ts after the drive of the heater 6 is started is less than predetermined time Tsx (step S202). That is, the following conditions
Tsx> Ts
Whether or not is satisfied is determined.
[0112]
When the elapsed time Ts is less than the predetermined time Tsx (step S202: Yes), the heater 6 is driven to end the present process once (step S203). Then, when the elapsed time Ts exceeds the predetermined time Tsx (step S202: No), the heater 6 is stopped and this process is temporarily ended (step S204).
[0113]
On the other hand, when the ignition signal exIG is off (step S201: No), the converter-equipped inverter 17 is stopped and the process is terminated (step S205).
[0114]
Next, operational effects achieved through the preheating process will be described.
In the present embodiment, when the oxygen sensor 61 is warmed up, the heater 6 is driven by the output voltage (DC14V) of the DCDC converter 17b higher than the output voltage (DC12V) of the auxiliary battery 23. Yes. Thereby, since the heater 6 is driven with a higher capacity, the warm-up of the oxygen sensor 61 can be completed early. In addition, it is possible to suitably suppress a decrease in detection accuracy due to insufficient warm-up of the oxygen sensor 61.
[0115]
In the present embodiment, the HV battery 16 and the converter-equipped inverter 17 mounted on the hybrid vehicle 1 are diverted to realize the above-described improvement in the performance of the heater 6, and thus the overall configuration of the apparatus is complicated. Can be suitably avoided.
[0116]
Next, an example of a driving mode of the heater 6 by the preheating process (FIGS. 6 and 11) will be described with reference to FIG.
For example, when the ignition switch IG is switched to the “on” position at time t121 and it is detected that the ignition signal exIG is turned on, driving of the converter-equipped inverter 17 is started when the ignition signal exIG is turned on. (FIGS. 12A and 12B).
[0117]
Then, at time t122, if it is detected that conditions such as “starter signal history exSTAf is on”, “output voltage Vcn of DCDC converter 17b is DC14V or higher” and “preheat condition is satisfied” are detected, heater 6 starts (FIGS. 12C to 12F).
[0118]
From time t123 to time t124 when the predetermined time Tsx elapses, DC 14V is input to the heater 6 and the oxygen sensor 61 is preheated (FIGS. 12 (f) and 12 (g)).
[0119]
As described above in detail, according to the temperature raising device for the vehicle-mounted device according to the second embodiment, the excellent effects listed below can be obtained.
(1) In the present embodiment, the HV battery 16 and the inverter 17 with a converter are used as the power source for the heater 6. Thereby, electric power can be effectively supplied to the heater 6.
[0120]
(2) Moreover, since the power supply of the said temperature rising apparatus is comprised using the equipment with which the hybrid vehicle 1 is equipped, while the apparatus can be implement | achieved with a simple structure, An increase in cost is suitably suppressed.
[0121]
(3) In the present embodiment, prior to the start of driving of the oxygen sensor 61, the heater 6 is driven by the output voltage (DC 14V) of the DCDC converter 17b higher than the output voltage (DC 12V) of the auxiliary battery 23. . Thereby, since the heater 6 is driven with higher capability, the warm-up of the oxygen sensor 61 can be completed early.
[0122]
(4) In the present embodiment, the capacity of the heater 6 is improved by using the HV battery 16 and the converter-equipped inverter 17 mounted on the hybrid vehicle 1, so that the temperature raising device for the in-vehicle device can be easily provided. In addition to being able to be realized, complication of the configuration of the entire apparatus is preferably avoided.
[0123]
(5) In the present embodiment, the output voltage of the DCDC converter 17b is monitored, and the heater 6 is driven when the monitored output voltage is DC14V or higher. As a result, the oxygen sensor 61 can be warmed up more quickly.
[0124]
In addition, the said 2nd Embodiment can also be implemented as the following forms which changed this suitably, for example.
In the second embodiment, the heater 6 is driven by the output voltage (DC14V) of the DCDC converter 17b. However, for example, the following modifications can be made. That is, the heater 6 may be driven by either the output voltage (DC 14 V) of the DCDC converter 17 b or the output voltage (DC 12 V) of the auxiliary battery 23 according to the temperature of the oxygen sensor 61.
[0125]
In the second embodiment, the heater 6 is driven for a predetermined time Tsx when it is determined that the conditions for preheating are satisfied (FIG. 11: steps S105 to S203). For example, the following modifications are possible. That is, when it is determined that the condition for performing preheating is satisfied, the heater 6 may be driven until the temperature of the oxygen sensor 61 becomes equal to or higher than a predetermined temperature.
[0126]
In the second embodiment, the heater 6 is not started when the output voltage Vcn of the DCDC converter 17b is less than DC14V. However, for example, the following changes may be made. That is, even when the output voltage Vcn of the DCDC converter 17b is less than DC14V, it is estimated that the heater 6 is sufficiently warmed up by the heater 6 driven by the output voltage (DC12V) of the auxiliary battery 23. In that case, the heater 6 may be driven.
[0127]
In the second embodiment, the condition for performing the preheating is “the temperature of the oxygen sensor 61 is lower than the predetermined temperature”. However, when these conditions are satisfied, including other conditions The heater 6 can also be driven.
[0128]
-In the said 2nd Embodiment, although the electrical system E of the structure shown by FIG. 10 was assumed, the structure of the electrical system E is not restricted to the structure illustrated by the same FIG. 10, Arbitrary structures are employable. it can.
[0129]
In the second embodiment, it is assumed that the voltage input to the heater 6 and the auxiliary device 24 through the DCDC converter 17b is DC 14V. It is also possible to adopt a configuration in which a value larger than the output voltage of the machine battery 23 is input.
[0130]
In the second embodiment, the preheat process (FIGS. 6 and 11) is configured to determine whether or not the output voltage Vcn from the DCDC converter 17b is equal to or higher than DC14V (FIG. 6: Step S104). ), And the preheating process can be performed by omitting the determination process.
[0131]
In the second embodiment, it is assumed that the HV battery 16 having the output voltage DC288V is used. However, a battery having an arbitrary output voltage can be adopted as the HV battery.
[0132]
In the second embodiment, it is assumed that the auxiliary battery 23 having the output voltage DC12V is used. However, an auxiliary battery having an arbitrary output voltage can be used. In short, any auxiliary battery can be used as long as the battery has an output voltage lower than the voltage input to the heater 6 through the DCDC converter 17b.
[0133]
In the second embodiment, the present invention is applied to the heater 6 of the oxygen sensor 61 provided in the internal combustion engine 11 of the hybrid vehicle 1. However, the present invention is provided in an internal combustion engine of a vehicle other than the hybrid vehicle. The present invention can also be applied to a heater of an oxygen sensor.
[0134]
In the second embodiment, the present invention is applied to the heater 6 of the oxygen sensor 61, which is a functional component of the internal combustion engine 11, but the present invention can also be applied to other than the heater of the oxygen sensor.
[0135]
(Third embodiment)
A third embodiment of the present invention will be described with reference to FIGS. While the first and second embodiments embody the present invention as a temperature raising device for an in-vehicle device mounted on a hybrid vehicle, the present embodiment is an ordinary vehicle. The present invention is embodied as a heat storage device for an internal combustion engine mounted on (a vehicle having only the internal combustion engine as a drive source).
[0136]
First, with reference to FIG. 13, the structure of the heat storage device in the present embodiment will be described together with the cooling water circulation system for circulating the cooling water of the internal combustion engine.
As shown in FIG. 13, the configurations of the cooling water circulation system 3 and the heat storage device 2 according to the present embodiment are basically the same as the configurations exemplified in the first embodiment, and therefore overlap. Description to be omitted is omitted. Moreover, since the circulation mode of the cooling water in the cooling water circulation system 3 is the same as the circulation mode described in the first embodiment, the description thereof is also omitted.
[0137]
In the present embodiment, the electric system E includes a high voltage battery 41 and a low voltage battery 42 (low voltage power source) having an output voltage (for example, DC 12 V) smaller than that of the high voltage battery 41. The control of the driving mode of the water pump 22 and the switching of the three-port valves 32 and 34 are performed through the ECU 5 constituting the control means.
[0138]
Next, a detailed configuration of the electric system E (within the broken line in FIG. 13) will be described with reference to FIG.
In the present embodiment, the low voltage battery 42 supplies power to the water pump 22 and the auxiliary machine 24.
[0139]
The ECU 5 is also supplied with an ignition signal exIG indicating that the ignition switch IG is in the “on” position, and a starter signal exSTA sent from the starter motor STA when the switch IG is switched to the “start” position. The Then, the ECU 5 controls the water pump 22 and the like based on the starter signal history exSTAf indicating that the ignition signal exIG and the starter signal exSTA are input.
[0140]
Next, a preheating process performed for early completion of warming up of the internal combustion engine 11 will be described with reference to FIGS. 15 and 16. This process is repeatedly executed every predetermined cycle (for example, a predetermined time).
[0141]
As shown in FIGS. 15 and 16, in this process, it is first determined whether or not the ignition signal exIG is on (step S301). That is, the following conditions
exIG = 1
Whether or not is satisfied is determined. The subsequent processing (steps S302 to S306) performed when the ignition signal exIG is ON supplies the cooling water stored in the heat storage tank 21 to the internal combustion engine 11 to warm up the engine 11. It is performed as a process for completing at an early stage. On the other hand, the subsequent processing (steps S307 to S309) performed when the ignition signal exIG is off absorbs heat from the internal combustion engine 11 and stores the cooling water in a high temperature state in the heat storage tank 21. As done.
[0142]
First, processing that is performed when the ignition signal exIG is on will be described.
When the ignition signal exIG is on (step S301: Yes), it is determined whether the starter signal history exSTAf indicating that the starter motor STA is driven is on (step S302). That is, the following conditions
exSTAf = 1
Whether or not is satisfied is determined. Incidentally, the starter signal history exSTAf is cleared when the ignition signal exIG is turned off.
[0143]
When the starter signal history exSTAf is on (step S302: Yes), it is determined whether or not a condition for performing preheating is satisfied (step S303). In the present embodiment, it is assumed that the condition for performing the preheating is “the temperature of the cooling water on the outlet side of the heat storage tank 21 is equal to or higher than a predetermined temperature”.
[0144]
When the condition for performing the preheating is satisfied (step S303: Yes), it is determined whether or not the elapsed time Ts from the start of the driving of the water pump 22 is less than the predetermined time Tsx (step S304). ). That is, the following conditions
Tsx> Ts
Whether or not is satisfied is determined. When the determination conditions in steps S302 and S303 are not satisfied, the driving of the water pump 22 is stopped and the present process is temporarily terminated (step S307).
[0145]
When the elapsed time Ts is less than the predetermined time Tsx (step S304: Yes), the water pump 22 is driven to end this process once (step S305). When driving of the water pump 22 is started, the second circulation path (FIG. 4) in the cooling water circulation system 3 is activated through a separate process performed through the ECU 5.
[0146]
Then, when the elapsed time Ts exceeds the predetermined time Tsx (step S304: No), the water pump 22 is stopped and this process is temporarily ended (step S306). Further, when the water pump 22 is stopped, the operation of the internal combustion engine 11 is started.
[0147]
Next, processing performed when the ignition signal exIG is off will be described.
When the ignition signal exIG is on (step S301: No), it is determined whether or not the elapsed time Te after the ignition signal exIG is off is less than the predetermined time Tex (step S307). That is, the following conditions
Tex> Te
Whether or not is satisfied is determined.
[0148]
When the elapsed time Te is less than the predetermined time Tex, the water pump 22 is driven to end the present process once (step S308). When driving of the water pump 22 is started, the second circulation path (FIG. 4) in the cooling water circulation system 3 is activated through the separate processing.
[0149]
Then, when the elapsed time Te exceeds the predetermined time Tex (step S307: No), the water pump 22 is stopped and this process is ended (step S309).
[0150]
Next, operational effects achieved through the preheating process will be described.
In the present embodiment, since the low voltage battery 42 is used as the power source of the heat storage device 2, power can be effectively supplied to the heat storage device 2.
[0151]
Moreover, since the power supply of the said temperature rising apparatus is comprised using the equipment with which the vehicle is equipped, this apparatus can be implement | achieved with a simple structure.
[0152]
Next, an example of a driving mode of the water pump 22 by the preheating process (FIGS. 15 and 16) will be described with reference to FIG.
For example, it is assumed that at time t171, the ignition switch IG is switched to the “on” position and it is detected that the ignition signal exIG is turned on. Then, if it is detected that the starter signal history exSTAf is turned on at time t172 and that the preheat condition is satisfied, the water pump 22 continues from time t172 to time t173 when a predetermined time Tsx elapses. Is driven by the low-voltage battery 42 (FIGS. 17A to 17E). Incidentally, when this preheating is completed, the operation of the internal combustion engine 11 is started.
[0153]
If it is detected that the operation of the internal combustion engine 11 is stopped and the ignition signal exIG is turned off at time t174, the water pump 22 is kept at a low pressure from time t174 until time t175 when a predetermined time Tex elapses. It is driven by the battery 42 (FIGS. 17A, 17D and 17E).
[0154]
If it is detected at time t175 that the driving time of the water pump 22 has reached the predetermined time Tex, the driving of the pump 22 is stopped (FIG. 17D).
[0155]
As described above in detail, according to the temperature raising device for the vehicle-mounted device according to the third embodiment, the excellent effects listed below can be obtained.
(1) In the present embodiment, the low voltage battery 42 is used as the power source of the heat storage device 2. Thereby, electric power can be effectively supplied to the heat storage device 2.
[0156]
(2) Moreover, since the power supply of the said temperature rising apparatus is comprised using the equipment with which the vehicle is equipped, it becomes possible to implement | achieve the apparatus with a simple structure, and cost. The rise is suitably suppressed.
[0157]
(3) In the present embodiment, prior to starting the internal combustion engine 11, high-temperature cooling water is supplied to the engine 11. Thereby, since the heat of the cooling water is transmitted to the internal combustion engine 11, the warm-up of the engine 11 can be completed early.
[0158]
(4) In the present embodiment, the water pump 22 is driven immediately after the operation of the internal combustion engine 11 is stopped, and the cooling water is stored in the heat storage tank 21. Thereby, higher-temperature cooling water can be stored.
[0159]
(5) In the present embodiment, since the power source of the water pump 22 is configured by diverting the low voltage battery 42 mounted on the vehicle, the heat storage device 2 can be easily realized. become.
[0160]
(6) In the present embodiment, immediately after the operation of the internal combustion engine 11 is stopped, the water pump 22 is driven for a predetermined time Tex to store the cooling water in the heat storage tank 21. As described above, since the water pump 22 is driven for a preset time, it is possible to suitably avoid complication of processing for storing the cooling water.
[0161]
Note that the third embodiment can be implemented as an appropriate modification of the above, for example, as follows.
In the third embodiment, the water pump 22 is driven for a predetermined time Tsx when it is determined that the conditions for preheating are satisfied (FIG. 15: Steps S303 to S305). ), For example, can be changed as follows. That is, when it is determined that the conditions for preheating are satisfied, the water pump 22 can be driven until the temperature of the cooling water in the internal combustion engine 11 becomes equal to or higher than a predetermined temperature.
[0162]
In the third embodiment, the electrical system E having the configuration shown in FIG. 14 is assumed, but a configuration different from the configuration illustrated in FIG.
[0163]
In the third embodiment, the water pump 22 is driven by the output voltage of the low-voltage battery 42 before starting the internal combustion engine 11 and immediately after the operation of the engine 11 is stopped. However, for example, the following change is made. You can also That is, the water pump 22 is driven by the output voltage of the high-voltage battery 41 before the internal combustion engine 11 is started, and the water pump 22 is driven by the output voltage of the low-voltage battery 42 immediately after the engine 11 is stopped. it can.
[0164]
In addition, for example, before starting the internal combustion engine 11, the water pump 22 is driven with the output voltage of the low-voltage battery 42 boosted through a transformer, and immediately after the engine 11 is stopped, the water pump 22 is driven with the output voltage of the low-voltage battery 42. The pump 22 may be driven. When these configurations are adopted, the internal combustion engine 11 can be warmed up early and high-temperature cooling water can be recovered more suitably.
[0165]
(Other embodiments)
Other elements that can be changed in common with the above-described embodiments include the following.
[0166]
In the first and third embodiments, the water pump 22 is driven until the predetermined time Tex elapses after the ignition signal exIG is turned off. However, for example, the following change is made. It is also possible to do. That is, the water pump 22 can be driven until the temperature of the cooling water stored in the heat storage tank 21 becomes equal to or higher than a predetermined temperature. However, in adopting such a configuration, depending on the state of the internal combustion engine 11, the temperature of the cooling water may not reach the predetermined temperature. Therefore, when the driving time of the water pump 22 exceeds the predetermined time, the pump The driving of 22 is stopped. When such a configuration is adopted, the driving of the water pump 22 after the operation of the internal combustion engine 11 is stopped can be stopped early, so that the load on the auxiliary battery 23 (low voltage battery 42) is reduced. Will be able to.
[0167]
In the first and third embodiments, the condition for performing the preheating is “the temperature of the cooling water at the outlet side of the heat storage tank 21 is equal to or higher than the predetermined temperature”, but includes other conditions. The water pump 22 can be driven when these conditions are satisfied.
[0168]
In the first and third embodiments, the cooling water circulation direction by the mechanical water pump 31 is opposite to the cooling water circulation direction by the cooling water circulation system by the electric water pump 22. However, the present invention can also be applied to a configuration in which the cooling water circulation directions by these pumps 31 and 22 are the same. In the case where the cooling water circulation directions by the pumps 31 and 22 are the same, the cooling water can be stored in the heat storage tank 21 during the operation of the internal combustion engine 11.
[0169]
In the first and third embodiments, the cooling water circulation system 3 having the path configuration shown in FIG. 2 (FIG. 13) is assumed, but the configuration different from the configuration illustrated in FIG. Can also be adopted. In short, it is possible to supply the high-temperature cooling water stored in the heat storage tank 21 to the internal combustion engine 11 through the electric pump (water pump 22), and the heat of the engine 11 is absorbed and becomes high temperature. The configuration of the cooling water circulation system 3 can be appropriately changed as long as the cooling water can be stored in the heat storage tank 21.
[0170]
In the first and third embodiments, the present invention is applied to the heat storage device 2 that raises the temperature of the internal combustion engine 11 through the cooling water, but in addition, for example, the temperature of the internal combustion engine through the heat generation of the device itself It is also possible to apply the present invention to a heater that raises the temperature.
[0171]
In the first and third embodiments, the present invention is embodied as a temperature raising device (heat storage device) for an internal combustion engine, and in the second embodiment, the temperature raising device (heater) for an oxygen sensor. However, it is also possible to embody the present invention as, for example, a temperature raising device for a transmission. In short, in a vehicle having a plurality of power supplies with different output voltages, the present invention can be applied to any vehicle-mounted device temperature raising device mounted on the vehicle. The effect according to the effect can be produced.
[Brief description of the drawings]
FIG. 1 is a schematic diagram showing the overall configuration of a hybrid vehicle according to a first embodiment that embodies a temperature raising device for an in-vehicle device according to the present invention.
FIG. 2 is a diagram schematically showing a configuration of a cooling water circulation system of an internal combustion engine including the temperature raising device of the on-vehicle equipment, regarding the temperature raising device of the on-vehicle equipment of the embodiment.
FIG. 3 is a diagram schematically showing a configuration of a cooling water circulation system of an internal combustion engine including the temperature raising device for the on-vehicle equipment in the temperature raising device for the on-vehicle equipment of the embodiment.
FIG. 4 is a diagram schematically showing a configuration of a cooling water circulation system of an internal combustion engine including the temperature raising device for the vehicle-mounted device, regarding the temperature raising device for the vehicle-mounted device according to the embodiment.
FIG. 5 is a circuit diagram schematically showing a configuration of an electric system according to the temperature raising device of the vehicle-mounted device of the vehicle-mounted device according to the embodiment;
FIG. 6 is a flowchart showing a part of preheating processing performed in the embodiment;
FIG. 7 is a flowchart showing a part of preheating processing performed in the embodiment;
FIG. 8 is a timing chart showing an example of the driving mode of the electric pump by the preheating process performed in the embodiment.
FIG. 9 is a schematic diagram showing a configuration of an entire apparatus including a temperature raising device for the in-vehicle device in a second embodiment that embodies the temperature raising device for the in-vehicle device according to the present invention.
FIG. 10 is a circuit diagram schematically showing a configuration of an electric system according to the temperature raising device for the vehicle-mounted device of the vehicle-mounted device according to the embodiment;
FIG. 11 is a flowchart showing a part of a preheating process performed in the embodiment.
FIG. 12 is a timing chart showing an example of a heater driving mode by preheating processing performed in the embodiment.
FIG. 13 is a diagram schematically showing a configuration of a cooling water circulation system of an internal combustion engine including a temperature raising device for an in-vehicle device in a third embodiment that embodies the temperature raising device for the in-vehicle device according to the present invention. .
FIG. 14 is a circuit diagram schematically showing a configuration of an electrical system related to the temperature raising device for the vehicle-mounted device in the vehicle-mounted device temperature raising device according to the embodiment;
FIG. 15 is a flowchart showing a part of preheating processing performed in the embodiment;
FIG. 16 is a flowchart showing a part of preheating processing performed in the embodiment;
FIG. 17 is a timing chart showing an example of a heater driving mode by preheating processing performed in the embodiment;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Hybrid vehicle, 11 ... Internal combustion engine, 12 ... Electric motor, 13 ... Reduction gear, 14 ... Drive shaft, 15 ... Wheel, 16 ... HV battery, 17 ... Inverter with converter, 17a ... Inverter, 17b ... DCDC converter, 17c ... Converter control circuit, 18 ... Power split mechanism, 19 ... Generator, 2 ... Heat storage device, 21 ... Heat storage tank, 22 ... Water pump (electric pump), 23 ... Auxiliary battery, 24 ... Auxiliary machine, 3 ... Cooling water circulation system , 31 ... Water pump, 32 ... 3 port valve, 33 ... Heater core, 34 ... 3 port valve, 35 ... Radiator, 41 ... High voltage battery, 42 ... Low voltage battery, 5 ... Electronic control unit (ECU), C1 ... First relay Circuit, C2 ... second relay circuit, R1 ... first circulation path R1, R2 ... second circulation path R2, R3 ... third circulation path R3, R4 ... fourth circulation path R4, R5 ... fifth circulation path R5, R6 ... sixth circulation path R6, R7 ... seventh circulation path R7, IG ... ignition switch, STA ... starter motor.

Claims (5)

Applied to a vehicle having a plurality of power supplies with different output voltages, a temperature raising device for an in-vehicle device that raises the temperature of the in-vehicle device of the vehicle,
The temperature raising device of the vehicle-mounted device is a heat storage device that raises the temperature of the internal combustion engine by supplying a heat medium stored in the heat storage device to the internal combustion engine of the vehicle by an electric pump, and the electric pump Driving with a low-voltage power source among the plurality of power sources,
The low-voltage power supply is one in which an output voltage from a high-voltage storage battery having an output voltage higher than the first voltage of the low-voltage power supply is stepped down by a transformer,
When the temperature of the vehicle-mounted device is increased by supplying the heat medium to the vehicle-mounted device, the output from the high-voltage storage battery that has been stepped down to a second voltage that is higher than the first voltage of the low-voltage power source through the transformer The electric pump is driven by voltage, and the electric pump is driven by the low-voltage power source when the heat medium is stored in the heat accumulator while recovering the heat of the on-vehicle equipment. Temperature device. Applied to a hybrid vehicle equipped with an electric motor and an internal combustion engine as a drive source, and having a transformer that steps down the output voltage of a high-voltage storage battery that supplies electric power to the electric motor to a first voltage and inputs the voltage to an auxiliary machine A heating device for a vehicle-mounted device that raises the temperature of the vehicle-mounted device by supplying the heat medium stored in the heat storage device to the vehicle-mounted device of the hybrid vehicle by an electric pump,
When the temperature of the vehicle-mounted device is increased by supplying the heat medium to the vehicle-mounted device, the output voltage from the high-voltage storage battery is stepped down to a second voltage higher than the first voltage through the transformer. When the electric pump is driven and the heat medium is collected in the heat accumulator while collecting the heat of the vehicle-mounted device through the heat medium, the electric pump is driven by the first voltage.
An on- vehicle equipment temperature increasing device characterized by the above . The present invention is applied to a hybrid vehicle equipped with an electric motor and an internal combustion engine as a drive source, and having a transformer that steps down the output voltage of a high voltage storage battery that supplies electric power to the electric motor to a first low voltage and inputs it to an auxiliary machine. A heating device for an in-vehicle device that raises the temperature of the in-vehicle device by supplying the heat medium stored in the regenerator to the in-vehicle device of the hybrid vehicle by an electric pump,
When raising the temperature of the vehicle-mounted device by supplying the heat medium to the vehicle-mounted device, the electric pump is driven with the first low voltage, and the heat is recovered while collecting the heat of the vehicle-mounted device through the heat medium. When storing the medium in the heat accumulator, the electric pump is driven by an output voltage from the high-voltage storage battery that is stepped down to a second low voltage lower than the first low voltage through the transformer.
An on- vehicle equipment temperature increasing device characterized by the above . An electric motor and an internal combustion engine are mounted as drive sources, and an output voltage of a high voltage storage battery that supplies electric power to the electric motor is stepped down to a predetermined first voltage to obtain a predetermined second voltage lower than the predetermined first voltage. Applied to a hybrid vehicle having a transformer for inputting the predetermined first voltage to the auxiliary machine and inputting the predetermined first voltage to the auxiliary machine as an output voltage, and the hybrid stored in the heat accumulator with an electric pump A temperature raising device for an in-vehicle device that increases the temperature of the in-vehicle device by supplying to the in-vehicle device of the vehicle,
When the temperature of the vehicle-mounted device is increased by supplying the heat medium to the vehicle-mounted device, the electric pump is driven with an output voltage from the high-voltage storage battery that has been stepped down to the predetermined first voltage, When the heat medium is stored in the heat accumulator while collecting the heat of the vehicle-mounted device, the electric pump is driven by the predetermined second voltage that is an output voltage from the low-voltage storage battery.
An on- vehicle equipment temperature increasing device characterized by the above . It is a temperature rising apparatus of the vehicle equipment according to any one of claims 1 to 4,
Control means for monitoring the magnitude of the voltage input to the temperature raising device of the in-vehicle device and permitting driving of the temperature raising device when the magnitude of the monitored voltage is a predetermined value or more.
An on- vehicle equipment temperature increasing device characterized by the above .

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