JP3716495B2 - In-vehicle compressor operation control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an operation control device for a compressor mounted on a vehicle for indoor cooling or refrigeration, and more particularly to an operation control device for an on-vehicle compressor suitable for a vehicle in which a main power unit is stopped when the vehicle is stopped. .
[0002]
[Prior art]
Conventionally, when a vehicle stops at an intersection or the like when driving in an urban area, the engine is automatically stopped under a predetermined stop condition, and then the engine is automatically restarted under a predetermined start condition to save fuel. And systems that improve exhaust emissions are known. Such a system is expected to be applied especially to route buses, etc. However, if the engine is stopped when the vehicle is stopped, the air conditioner will also stop. Have the problem of feeling uncomfortable.
[0003]
Therefore, for example, in the system described in Japanese Patent Application Laid-Open No. 60-111040, when the engine is stopped by waiting for a signal or the like, only the air conditioner fan is kept running so as to alleviate the above-mentioned discomfort. What has been proposed.
[0004]
[Problems to be solved by the invention]
However, if the air conditioner fan is continuously operated when the engine is stopped as in the system described in this publication, the temperature of the refrigerant rises, and even if the engine is restarted and the compressor starts operating, cold air is sent for a while. However, there is a new problem that the cooling capacity is not fully exhibited during urban driving where the start and stop are frequently repeated.
[0005]
The present invention, even in a system which is adapted to stop the main power unit to the vehicle is stopped, without using the air conditioner dedicated auxiliary power unit, and aims to as continue to sufficiently exhibit the cooling tufts ability To do.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, an on-vehicle compressor operation control device according to the present invention comprises a compressor driven by a traveling main power device, and an auxiliary power device different from the main power device, to drive the compressor. The compressor is driven by the auxiliary power unit when the main power unit is stopped under the power condition, and conversely, when the main power unit is operated, the compressor is driven by the main power unit. Compressor drive source switching means for switching the drive source between the main power unit and the auxiliary power unit is provided.
[0007]
According to this on-vehicle compressor operation control device, for example, when the vehicle is in a predetermined stop state such as waiting for a signal, the main power device is automatically stopped, and then when the predetermined start operation is performed, the main power device in the automatic restart system equipped with a primary power unit stops restarting means for, even during the stop of the main power unit, such as by a signal waiting, it is possible to continue to drive the compressor by the auxiliary power unit, stopping The interior cabin temperature and the inside temperature of the cool box can be maintained at predetermined temperature conditions, and an appropriate interior temperature can be maintained from the beginning even after restarting.
[0008]
In the on-vehicle compressor operation control device of the present invention, the auxiliary power unit is connected to the on-board battery and is driven by the main power unit to function as a power storage generator. A rotating machine that functions as an electric motor by being supplied with power is provided, and when the rotating machine is used as a compressor driving source by the compressor driving source switching means, the function can be switched from the generator to the electric motor. In this way, if it is made to function as an electric motor by supplying power to the generator, there is no need to provide a dedicated auxiliary power device, and there are two birds with one stone.
[0009]
In the system in which the main power unit is automatically started / stopped, the compressor drive source switching unit is configured to determine whether the main power unit is stopped and restarted by the main power unit stop / restart unit, and to determine the compressor drive condition. What is necessary is just to comprise as a means to perform the switching of the said compressor drive source based on the determination result of a means.
In addition, the main power unit stop / restart means may be configured not to stop the main power unit while the turn switch is set to the right turn side.
[0010]
In addition, in the on-board compressor operation control device of the present invention, the first clutch means for switching the connection state between the compressor and the main power unit, and the second clutch for switching the connection state between the compressor and the rotating machine . A compressor means, and the compressor drive source switching means rotates the compressor drive source from the main power unit by disengaging the first clutch means and engaging the second clutch means. It can be configured to switch to a machine .
In addition, the above-described operation control device for the on-vehicle compressor is configured to couple the main power unit, the rotating machine, and the compressor so that torque can be transmitted and received by a belt, and to generate torque generated from the main power unit and the rotating machine, It can transmit to other devices via a belt, and it can constitute so that each clutch means may be arranged in a torque transmission path, and a connection state may be changed.
In addition, in the operation control apparatus for the on-vehicle compressor of the present invention, it is unnecessary to use the rotating machine as a starter of the main power unit.
[0011]
The first clutch means is provided between the main power unit and the belt, and the second clutch means is provided between the compressor and the belt. If the operation control device is configured, the first clutch means can be brought into a connected state and the second clutch means can be brought into a non-connected state so that the rotating machine can function as a starter of the main power unit.
In addition, by setting the first clutch means and the second clutch means in a connected state, the compressor drive source is set as a main power unit and the compressor is driven so that the rotating machine functions as a generator. If the source switching means is configured, the rotating machine can also be used as a generator.
[0012]
As described above, according to the present invention, the cooling compressor can be driven even when the main power unit is stopped without using a dedicated auxiliary power unit, and the cooling air can be continuously sent even when the vehicle is stopped. In addition to being able to demonstrate sufficient cooling capacity immediately after restarting the main power unit, it is possible to exhibit a comfortable cabin environment while fully exhibiting effects such as fuel saving and noise reduction even during city driving where stopping and starting are repeated The environment inside the refrigerator can be maintained.
In addition, by adopting the present invention, the main power unit can be stopped even if control is performed with an emphasis on indoor cooling, etc., so that both demands for fuel economy savings and demands for improving the cabin environment can be achieved. The further excellent effect that it can be made can be exhibited.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a system configuration of the embodiment.
In this system, the internal combustion engine 1 is provided with an injector 3, an igniter 7, a rotating machine 40, and a cooling compressor 43, and a manual transmission 9 is connected to the output shaft of the internal combustion engine 1. An intake manifold 11 and an exhaust manifold 13 are connected to each cylinder of the internal combustion engine 1. The intake manifold 11 is provided with a throttle valve 15 that interlocks with an accelerator pedal 14. In addition, a parking brake 17 is provided in the vehicle. Is provided.
[0014]
The rotating machine 40 and the compressor 43 are coupled to each other by a crank pulley 1 a and a belt 41 via an idle pulley 47 as shown in FIG. 2 so that torque can be exchanged with the crankshaft of the internal combustion engine 1. A compressor clutch 42 is provided on the drive shaft of the compressor 43, and a crank clutch 44 is provided on the crankshaft. The compressor clutch 42 and the crank clutch 44 may be anything as long as they can be connected and released, but a small and light electromagnetic clutch is considered appropriate. Since the electromagnetic clutch is well known, the description of the structure and operation is omitted here.
[0015]
By bringing both the compressor clutch 42 and the crank clutch 43 into the engaged state, the torque of the internal combustion engine 1 can be transmitted to the compressor 43 and driven. At this time, the power of the internal combustion engine 1 can be transmitted to the rotating machine 40, and the rotating machine 40 can function as a generator as described below.
[0016]
The rotating machine 40 is connected to an inverter 45 that controls power generation / electricity switching and the amount of power generation / electricity, and the inverter 45 is connected to a battery 46 that charges and connects electric power. As described above, when the rotating machine 40 is caused to function as a generator, the generated power is charged into the battery 46 via the inverter 45.
[0017]
The throttle valve 15 is provided with a throttle position sensor 15a for detecting the opening degree and an idle switch 15b for detecting a fully closed state. The manual transmission 9 detects the vehicle speed based on the rotation speed of the output shaft. A vehicle speed sensor 23 is provided.
[0018]
The parking brake 17 is provided with a parking brake switch 25 that outputs a parking brake signal when activated, and various warnings such as the operating state of the parking brake 17 are transmitted to the driver on the display panel 19 arranged in front of the driver's seat. A display lamp 27 is provided for this purpose. An ignition switch 20 that outputs an electric signal to the inverter 45 when the internal combustion engine 1 is started is provided at a predetermined location in front of the driver's seat.
[0019]
The injector 3 is connected to an electronic control unit 37 via a fuel relay 31, the igniter 7 is connected via an ignition relay 35, and the rotating machine 40 is connected via an inverter 45.
In order to input various signals to the electronic control unit 37, an ignition primary coil 7a of the igniter 7, a throttle position sensor 15a, an idle switch 15b, an ignition switch 20, a vehicle speed sensor 23, a parking brake switch 25, a door switch 39a, a defogger switch 39b, a clutch switch 39c, an air conditioner switch 39d, a turn switch 39e, a battery voltage sensor 39f, a water temperature sensor 39g, and a vehicle room temperature sensor 39h are connected to the display lamp 27 to output various signals. A fuel relay 31, an inverter 45, an ignition relay 35, a compressor clutch 42, and a crank clutch 44 are connected.
[0020]
Of these, the door switch 39a is turned on when the door is closed, the defogger switch 39b is turned on when the defogger for defrosting is operating, and the clutch switch 39c is turned on when the clutch is engaged. become.
FIG. 3 shows a detailed configuration example of the electronic control unit 37.
[0021]
As shown in the figure, an electronic control unit 37 includes a CPU 37a for controlling various devices, a ROM 37b in which various numerical values and programs are written in advance, a RAM 37c in which numerical values and flags of calculation processes are written in a predetermined area, and an analog input signal as digital. An A / D converter (ADC) 37d that converts signals, an input / output interface (I / O) 37e that receives various digital signals and outputs various digital signals, and a bus line 37f to which these devices are connected. It is composed of The program shown in the flowchart described later is written in advance in the ROM 37b.
[0022]
The I / O 37e includes an idle signal from the idle switch 15b, an engine speed signal from the ignition primary coil 7a, a start signal from the ignition switch 20, a parking brake signal from the parking brake switch 25, and a vehicle speed sensor 23. Vehicle speed signal, door signal from door switch 39a, defogger signal from defogger switch 39b, clutch signal from clutch switch 39c, air conditioner signal from air conditioner switch 39d, turn signal from turn switch 39e, and ignition signal from ignition switch 20 Is input to the ADC 37d, the battery voltage signal from the battery voltage sensor 39f, the water temperature signal from the water temperature sensor 39g, the throttle position signal from the throttle position sensor 15a, and the vehicle room temperature sensor. Vehicle interior temperature signal is inputted from 39h.
[0023]
The CPU 37a executes various calculations based on these various signals, and from the I / O 37c, the ignition cut and ignition signal, the fuel cut and fuel injection signal, the rotating machine switching signal, the rotating machine output torque signal, the rotating machine power generation, and the like. A voltage signal, a drive signal for the display panel 19, a compressor clutch signal, and a crank clutch signal are output.
[0024]
Next, the contents of the control processing executed in the system of this embodiment will be described based on the flowcharts of FIGS.
First, based on FIG. 4, the processing content at the time of starting of an internal combustion engine is demonstrated.
This process starts the program if the ignition switch 20 is ON in step 101. When the ignition switch 20 is turned to the START position (step 102 = YES), the internal combustion engine 1 is started and the following process is performed. Is executed.
[0025]
First, the compressor clutch 42 is turned off (step 103), and the crank clutch 44 is turned on (step 104). Thereafter, the rotating machine 40 is electrically operated, fuel is injected, and the spark plug is also ignited (step 105). Further, the rotational speed Ne of the internal combustion engine 1 is read (step 106), and when it reaches 300 rpm or more, it is determined that the start has been completed, the rotating machine 40 is operated to generate power, and power is supplied to the electrical system of the vehicle (steps 107 and 108). . Thereafter, it is confirmed again whether or not the ignition switch 20 is ON (step 109).
[0026]
FIG. 5 shows a flow relating to the automatic stop of the internal combustion engine.
In this process, when the rotational speed of the internal combustion engine 1 is 1000 rpm or less (step 110 = YES), the idle switch 15b is ON (step 111 = YES), the vehicle speed is 10 km / h or less (step 112 = YES), and the clutch switch 39c is ON (step 113 = YES), the battery voltage is 10.5V or higher (step 114 = YES), the defogger switch 39b is OFF (step 115 = YES), and the cooling water temperature is 60 ° C. or higher (step 116). = YES) When the turn switch 39e is not turned to the right (step 117 = NO) and the door switch 39a is turned on (step 118 = YES), it is determined that the internal combustion engine has been stopped, and the fuel is supplied. Cut (step 119). If even one of the above conditions does not apply, the internal combustion engine is continuously operated (step 120).
[0027]
FIG. 6 shows the operation of the air conditioner when the internal combustion engine 1 is stopped. If the air conditioner switch 39d is OFF (step 121 = NO), the operation of the rotating machine 40 is stopped and neither power generation nor electric drive is performed (step 122). On the other hand, if the air conditioner switch 39d is ON, the crank clutch 44 is turned OFF (step 123). If the temperature Tr in the passenger compartment is higher than the first reference value Tsh (step 124 = YES), the compressor clutch 42 is turned on and the rotary machine 40 is electrically operated to drive the compressor 43 (step 127). , 129).
[0028]
On the other hand, when it is determined in step 124 that the vehicle interior temperature Tr is equal to or lower than the first reference temperature Tsh, first, it is confirmed whether the rotating machine 40 is electrically operated (step 125). If the electric operation is not being performed, the operation of the rotating machine is stopped and the compressor clutch 42 is turned off to stop the driving of the compressor 43 (steps 128 and 130).
[0029]
When it is confirmed in step 125 that the rotating machine 40 is electrically operated, the vehicle interior temperature Tr is compared with the second reference temperature Tsl. When the temperature is higher than Tsl, the process proceeds to step 127. Proceed to 128 (step 126). Tsh is set to be 1 to 2 ° C. higher than Tsl, and step 125 and step 126 prevent the hunting by providing hysteresis to the operating temperature of the compressor 43.
[0030]
In the following step 131, it is confirmed whether or not the clutch is turned off. If it is turned off, the driver has stepped on the clutch, and it is determined that there is an intention to restart the internal combustion engine 1, and the operation of the rotating machine is stopped. The process returns to step 103 (step 132). On the other hand, when it is confirmed in step 131 that the clutch remains on, it is determined that the internal combustion engine 1 should be stopped continuously, and after waiting for a predetermined time, it is confirmed whether the ignition switch 20 is on and then the process returns to step 121 again. Return (steps 133 and 134).
[0031]
FIG. 7 shows the operation of the air conditioner when the internal combustion engine 1 is operating.
In this case, the crank clutch 44 is turned on, the rotating machine 40 is generated, and power is supplied to the vehicle electrical system (steps 135 and 136). If the air conditioner switch 39d is OFF (step 137 = NO), the compressor clutch 42 is turned OFF and the routine returns to step 109 (step 138). If the air conditioner switch 39d is ON (step 137 = YES) and the temperature Tr in the vehicle compartment is higher than the first reference temperature Tsh (step 139 = YES), the compressor clutch 42 is turned ON (step 142), and the internal combustion engine 1 To drive the compressor 43. Step 140 and step 141 correspond to step 125 and step 126 in FIG. If negative in step 140 or positive in step 141, the compressor clutch 42 is turned off so that the compressor 43 is not driven by the internal combustion engine 1 (step 143).
[0032]
FIG. 8 shows a time chart of the vehicle speed when the air conditioner is operating, the operating state of the internal combustion engine 1, the operating state of the rotating machine 40, the operating state of the compressor clutch 42, and the operating state of the crank clutch 44.
As shown in FIG. 8, when a start signal is input from the ignition switch 20, the crank clutch 44 is turned on and the compressor clutch 42 is kept off, and the rotating machine 40 is made to function as an electric motor, thereby causing the internal combustion engine 1. Start. That is, in the present embodiment, the rotating machine 40 is used together as a starter motor. After the start is completed, the rotating machine 40 is switched to the generator function, the compressor clutch 42 is turned on, and the compressor 43 is driven by the internal combustion engine 1.
[0033]
When the vehicle speed is reduced to 10 km / h or less due to waiting for a signal or the like, the fuel is cut through the determinations of steps 111 to 118, and the internal combustion engine 1 is automatically stopped. Then, with a slight delay, the crank clutch 44 is turned off, the rotating machine 40 is switched to the electric function, and the compressor 43 is switched to driving by the rotating machine 40.
[0034]
When the signal changes to blue and the clutch is turned off, the rotating machine 40 is first stopped slightly later. Then, after the compressor clutch 42 is switched to OFF, the internal combustion engine 1 is restarted by turning the crank clutch 44 ON and driving the rotating machine 40 as an electric motor. When the internal combustion engine 1 is restarted, the rotating machine 40 is switched to the generator, and the compressor clutch 42 is turned on to return to the state in which the compressor 43 is driven by the internal combustion engine 1 as in the start.
[0035]
When the air conditioner is not operating, the compressor clutch 42 remains off as shown in the time chart of FIG. The power generation state is controlled to be stopped while the vehicle is stopped.
[0036]
Although one embodiment of the present invention has been described above, the present invention is not limited to this and can be implemented in various modes.
For example, as shown in FIG. 10, the compressor clutch 42 and the crank clutch 44 are both installed on the output shaft of the rotating machine 40, two pulleys are installed on the output shaft of the rotating machine 40, and the compressor 43 and the crankshaft may be connected separately by belts 41 and 41.
[0037]
In addition to the internal combustion engine, the present invention can be applied as it is even to a vehicle including a Stirling engine, a hydraulic motor, or the like as a driving main power unit.
[Brief description of the drawings]
FIG. 1 is a system configuration diagram of an embodiment.
FIG. 2 is a configuration diagram showing a connection state of a power transmission portion to the compressor.
FIG. 3 is a configuration diagram showing an input / output relationship of the control device portion;
FIG. 4 is a flowchart showing a part of a control program executed by the control device.
FIG. 5 is a flowchart showing a part of a control program executed by the control device.
FIG. 6 is a flowchart showing a part of a control program executed by the control device.
FIG. 7 is a flowchart showing a part of a control program executed by the control device.
FIG. 8 is a timing chart illustrating an operation when the air conditioner is ON in the embodiment.
FIG. 9 is a timing chart for explaining the operation when the air conditioner is OFF in the embodiment.
FIG. 10 is a configuration diagram of a modified example of a power transmission portion to a compressor.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Internal combustion engine, 15a ... Throttle position sensor, 15b ... Idle switch, 20 ... Ignition switch, 23 ... Vehicle speed sensor, 25 ... Parking brake switch, 37 ... Electronic control Device, 39a ... door switch, 39b ... defogger switch, 39c ... clutch switch, 39d ... air conditioner switch, 39e ... turn switch, 39f ... battery voltage sensor, 39g ... water temperature Sensor, 39h ... Vehicle room temperature sensor, 40 ... Rotating machine, 41 ... Belt, 42 ... Compressor clutch, 43 ... Compressor, 44 ... Crank clutch, 45 ... Inverter, 46 ···Battery.

Claims (8)

A compressor that is driven by a main power unit for traveling the vehicle and compresses the refrigerant;
Auxiliary power unit that drives the compressor separately from the main power unit,
Compressor driving condition determining means for determining whether or not the condition for driving the compressor is satisfied;
When it is determined by the compressor drive condition determining means that the compressor drive condition is satisfied, when the main power unit is stopped, the auxiliary power unit drives the compressor, and the main power unit Compressor drive source switching means for switching a compressor drive source between the main power unit and the auxiliary power unit so that the compressor is driven by the main power unit when operating ,
The auxiliary power device is connected to an in-vehicle battery and functions as a power storage generator by being driven by the main power device, and a rotating machine that functions as an electric motor by being fed from the in-vehicle battery.
An on- vehicle compressor operation control device characterized in that the function of the rotating machine is switched from a generator to an electric motor when the rotating machine is used as a compressor driving source by the compressor driving source switching means . In the operation control device of the in-vehicle compressor according to claim 1,
Stop determination means for determining whether or not the vehicle is in a predetermined stop state;
Start determination means for determining whether or not a predetermined driving operation for shifting to the start state has been performed when the vehicle is in the predetermined stop state;
The main power unit is stopped when it is determined by the stop determination unit that the vehicle is in a predetermined stop state, and the main power unit is switched when the predetermined driving operation is determined by the start determination unit. A main power unit stop restarting means for restarting,
The compressor drive source switching means performs switching of the compressor drive source based on the start / stop state of the main power unit by the main power unit stop / restart means and the determination result of the compressor drive condition determination unit. An on-vehicle compressor operation control device characterized by being configured as means. In the on-vehicle compressor operation control device according to claim 2 ,
A turn switch state determining means for determining whether or not a turn switch provided on the vehicle is set on the right turn side;
The main power unit stop / restart means is configured not to stop the main power unit for a period during which it is determined by the turn switch state determination means that the turn switch is set to the right turn side. An on-board compressor operation control device. In the on-board compressor operation control device according to any one of claims 1 to 3 ,
First clutch means for switching a connection state between the compressor and the main power unit;
Second clutch means for switching a connection state between the compressor and the rotating machine ,
The compressor drive source switching means switches the compressor drive source from the main power unit to the rotating machine by disengaging the first clutch means and engaging the second clutch means. An on-vehicle compressor operation control device characterized by being configured. In the on-vehicle compressor operation control device according to claim 4,
  A belt that couples the main power unit, the rotating machine, and the compressor so as to be able to transmit and receive torque;
  Torque generated from the main power unit and torque generated from the rotating machine are transmitted to other devices via the belt,
  The first clutch means is a torque transmission path from the main power unit to the compressor. Intervening, switching the connection state of the compressor and the main power unit,
  The second clutch means is configured to switch a connection state between the compressor and the rotating machine via a torque transmission path from the rotating machine to the compressor. Control device. In the on-vehicle compressor operation control device according to claim 5 ,
An on-vehicle compressor operation control device, wherein the rotating machine is used in combination as a starter of the main power unit. In the on-vehicle compressor operation control device according to claim 6,
  The first clutch means is interposed between the main power unit and the belt;
  The second clutch means is interposed between the compressor and the belt;
  The compressor drive source switching means is configured to cause the rotating machine to function as a starter of the main power unit by bringing the first clutch means into a connected state and bringing the second clutch means into a non-connected state. An on-vehicle compressor operation control device. In the operation control apparatus of the vehicle-mounted compressor in any one of Claims 5-7 ,
The compressor drive source switching means sets the compressor drive source as a main power unit by causing the first clutch means and the second clutch means to be in a connected state, and causes the rotating machine to function as a generator. An on-vehicle compressor operation control device characterized by being configured as described above.

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