JP2009051468A - Vehicle control device - Google Patents

Abstract

There is provided a vehicle control apparatus capable of suitably suppressing the execution frequency of processing for optimizing stored data of an electronic control unit in a vehicle having an automatic stop / start system.
The apparatus includes an automatic stop / start system, an air conditioning system, and a battery 19 for supplying electric power to the system. The reference rotational positions of the motors 26 and 30 provided in the air conditioning system are provided on condition that the arithmetic processing of the electronic control unit 45 of the air conditioning system is temporarily stopped due to the voltage drop of the battery 19 accompanying the automatic start of the internal combustion engine 11. A learning process for learning is executed. When the internal combustion engine 11 is automatically started during the operation of the air conditioning system in such a manner that the absolute rotational positions of the motors 26 and 30 do not change, execution of the learning process is prohibited.
[Selection] Figure 1

Description

  The present invention relates to a vehicle control device having a function of automatically stopping an internal combustion engine and a function of automatically starting the internal combustion engine.

  In recent years, in order to improve fuel efficiency and reduce emissions, the internal combustion engine is automatically stopped when the vehicle stops at an intersection or the like, and the vehicle can be started by automatically starting the internal combustion engine at any timing during the automatic stop. Vehicles equipped with an automatic stop / start system have been put into practical use. This automatic stop / start system includes an electronic control unit, and the electronic control unit executes a process for automatically stopping the internal combustion engine and a process for automatically starting the internal combustion engine.

  The vehicle is also provided with an air conditioning system for keeping the passenger compartment comfortable. As this air conditioning system, an electronic control unit, an air conditioning motor for adjusting the operating state of the system, and a position sensor for detecting the relative rotational position of the air conditioning motor are in practical use. In such an air conditioning system, drive control of the air conditioning motor based on the output signal of the position sensor is executed by the electronic control unit, and the operating state is adjusted.

Further, the vehicle is provided with a battery, and an automatic stop / start system and an air conditioning system are operated by electric power supplied from the battery.
Here, when the internal combustion engine is automatically started, the output shaft of the internal combustion engine is forcibly rotated (cranked) by the starting motor, so that the battery voltage becomes very low due to power consumption by the starting motor.

  Since the electronic control unit of the automatic stop / start system needs to execute a process for automatically starting the internal combustion engine, the electronic control unit has a structure that can withstand such a voltage drop, and when the internal combustion engine is automatically started. But it works fine.

  On the other hand, the electronic control unit of the air conditioning system is often not structured to sufficiently withstand such a voltage drop. Therefore, in an air conditioning system using an electronic control unit having such a structure, in order to ensure the reliability of the electronic control unit, a process for optimizing the stored data when the internal combustion engine is automatically started (optimization) Process). As described above, when the optimization process is executed every time the internal combustion engine is automatically started, the frequency of the optimization process increases, and the calculation load of the electronic control unit increases accordingly.

2. Description of the Related Art Conventionally, it has been proposed to provide a battery for supplying electric power to another device in addition to a battery for supplying electric power to a cranking motor (see, for example, Patent Document 1). By applying such a configuration to the vehicle described above and supplying power to the air conditioning system from a separately provided battery, the optimization process is not executed when the internal combustion engine is automatically started, and the frequency of the optimization process is reduced. It becomes possible to plan.
JP-A-7-232605

  In the above-described vehicle, two batteries are required, so that an increase in cost due to the addition of the battery is unavoidable and a new inconvenience such as a need to secure a battery mounting space is caused. End up.

  In addition, not only the vehicle provided with the air conditioning system mentioned above but the vehicle provided with the system which has an electronic control unit which performs the arithmetic processing for changing a certain vehicle parameter, reflecting the previous arithmetic result in the newest arithmetic result In this case, the inconvenience that the execution frequency of the optimization process becomes high can occur similarly.

  The present invention has been made in view of such circumstances, and an object of the present invention is to suitably suppress the execution frequency of processing for optimizing stored data of an electronic control unit in a vehicle equipped with an automatic stop / start system. An object of the present invention is to provide a control device for a vehicle that can be used.

Hereinafter, means for achieving the above-described object and its operation and effects will be described.
According to the first aspect of the present invention, calculation processing for automatically stopping the operation of the internal combustion engine when the automatic stop condition is satisfied and that the automatic start condition is satisfied when the operation of the internal combustion engine is automatically stopped And an automatic stop / start system including an electronic control unit for executing an arithmetic process for automatically starting the internal combustion engine through driving of a starter motor for forcibly rotating the output shaft of the internal combustion engine, and for changing vehicle parameters A control system having an electronic control unit that executes the arithmetic processing while reflecting the previous calculation result in the latest calculation result, and a common battery that supplies power to the automatic stop and start system and the control system, Calculation of the electronic control unit of the control system due to the voltage drop of the battery accompanying automatic start of the internal combustion engine In the control device for a vehicle that executes an optimization process for optimizing the storage data of the electronic control unit of the control system on the condition that the operation is temporarily stopped, the control in a mode in which the latest calculation result does not change The gist is to prohibit the execution of the optimization process when the internal combustion engine is automatically started during operation of the system.

  Usually, when the voltage of the battery decreases as the internal combustion engine starts, the calculation process of the electronic control unit may temporarily stop, but the stored data of the electronic control unit is retained. Therefore, even in such a case, when the internal combustion engine is automatically started during operation of the control system in such a manner that the latest calculation result does not change, the same voltage as the stored data before the battery voltage is lowered by the automatic start This matches the stored data after the decrease. Therefore, in this case, the control system can be used after the battery voltage is restored and the arithmetic processing of the electronic control unit is resumed without executing the optimization processing for optimizing the storage data of the electronic control unit of the control system. It is possible to appropriately adjust the operating state of.

  According to the above configuration, when the optimization process is executed on the condition that the calculation process of the electronic control unit of the control system is temporarily stopped due to the battery voltage drop accompanying the automatic start of the internal combustion engine, the optimization process is performed. If the operating state of the control system can be appropriately adjusted without executing it, the execution of the optimization process can be prohibited. Therefore, the execution frequency of the optimization process can be suppressed while suppressing a decrease in the adjustment accuracy of the operating state of the control system.

  According to a second aspect of the present invention, in the vehicle control device according to the first aspect, the arithmetic processing for prohibiting the execution of the optimization processing is executed by the electronic control unit of the automatic stop / start system. The gist.

  Usually, the electronic control unit of the automatic stop / start system has a structure that can withstand the voltage drop of the battery accompanying the automatic start because it is necessary to automatically start the internal combustion engine, and is normal even during the automatic start of the internal combustion engine. To work.

  According to the above configuration, it is possible to appropriately execute the process for prohibiting the execution of the optimization process by the electronic control unit whose operating state is stable even when the internal combustion engine is automatically started.

  According to a third aspect of the present invention, in the vehicle control apparatus according to the first or second aspect, the vehicle includes an air conditioner, the vehicle parameter is an operating state of the air conditioner, and the control system is An air conditioning system comprising: the air conditioning device; an air conditioning motor for adjusting an operating state of the air conditioning device; and a position sensor that detects a relative rotational position of the air conditioning motor. The electronic control unit of the system obtains the absolute rotation position of the air conditioning motor through arithmetic processing based on the output signal of the position sensor and executes drive control of the air conditioning motor based on the obtained absolute rotation position. The gist of that is.

  As an air conditioning system mounted on a vehicle, there is one that adjusts the operating state of air conditioning equipment through drive control of an air conditioning motor. There is also an air conditioning system that obtains the absolute rotational position of the air conditioning motor based on the relative rotational position detected by the position sensor and that controls the driving of the air conditioning motor based on the absolute rotational position.

  In a vehicle equipped with such an air conditioning system, when the internal combustion engine is automatically started in a state where the rotational position of the air conditioning motor is changing, the arithmetic processing of the electronic control unit is temporarily performed due to a decrease in the battery voltage. May be stopped. In this case, the calculated value and the actual value of the absolute rotation position of the air conditioning motor are shifted by the amount of change in the rotation position of the air conditioning motor during the period in which the arithmetic processing is stopped. In such a case, it is possible to make the calculated value and the actual value of the absolute rotation position of the air conditioning motor coincide with each other by executing the optimization process.

  In addition, if the internal combustion engine is automatically started in a state where the rotational position of the air conditioning motor has not changed, the arithmetic processing of the electronic control unit may temporarily stop along with this, but before the arithmetic processing stops Since the rotational position of the air conditioning motor does not change between after and after the stop, the calculated value of the absolute rotational position of the air conditioning motor is very unlikely to deviate from the actual value. Therefore, in this case, it is possible to appropriately execute the drive control of the air conditioning motor after the battery voltage is restored and the arithmetic processing of the electronic control unit is resumed without performing the optimization process. .

  According to the above configuration, execution of the optimization process can be prohibited in such a case, that is, when the drive control of the air conditioning motor can be appropriately executed without executing the optimization process. Therefore, the execution frequency of the optimization process can be suppressed while suppressing a decrease in the adjustment accuracy of the operating state of the air conditioning system.

  According to a fourth aspect of the present invention, in the air conditioning system in which the absolute rotation position of the air conditioning motor is obtained from the reference rotation position and the relative rotation position by the electronic control unit, the optimization process includes the reference rotation position. A learning process for learning can be employed.

  According to a fifth aspect of the present invention, in the vehicle control device according to the fourth aspect, the air conditioning system is configured such that the rotation position of the air conditioning motor is abutted by an abutting portion of an operating part that operates in accordance with the driving of the air conditioning motor. The learning process is performed when the air conditioning motor is operated so that the operating portion is in contact with the stopper member, and the state is the same. The gist is that it is a process of learning the rotation position of the air conditioning motor as a reference rotation position.

  A stopper member is provided for restricting a change in the rotational position of the air conditioning motor by abutting the operating part that operates in accordance with the driving of the air conditioning motor, and the air conditioning unit is in contact with the stopper member. There is an apparatus that executes a learning process in which an electric motor is operated to learn a rotation position of an air conditioning motor when the electric motor is in the same state as a reference rotation position. In such a device, each time the learning process is executed, the operation part that operates in accordance with the driving of the air conditioning motor comes into contact with the stopper member. It becomes easy to cause a deformation | transformation, a defect | deletion, etc. of a part or a stopper member, and it becomes easy to cause the function fall of an air conditioning system by this.

  According to the above configuration, since the execution frequency of the learning process is suppressed to be low in an apparatus in which such a learning process is executed, it is possible to suppress a decrease in the function of the air conditioning system.

Hereinafter, an embodiment of a vehicle control device according to the present invention will be described.
Here, first, a schematic configuration of the vehicle control apparatus according to the present embodiment will be described with reference to FIG.

  As shown in FIG. 1, an internal combustion engine 11 as a power source is mounted on the vehicle 10. The power generated by the internal combustion engine 11 is transmitted from a crankshaft 12 as an output shaft to wheels (not shown) via a torque converter and an automatic transmission.

  On the other hand, the power generated by the internal combustion engine 11 is also transmitted to the transmission belt 15 via an electromagnetic clutch 13 and a pulley 14 connected to the crankshaft 12. Then, another pulley 16 is rotated by the power transmitted by the transmission belt 15. The electromagnetic clutch 13 can switch between transmission and non-transmission of power between the crankshaft 12 and the pulley 14 as necessary.

  The internal combustion engine 11 is provided with a motor 17 as an auxiliary machine, and the motor 17 is driven by the rotation of the pulley 16. When the motor 17 is driven by the rotational torque transmitted to the pulley 16, the motor 17 functions as a generator. The motor 17 is electrically connected to the inverter 18. The inverter 18 is switched so as to charge electric energy from the motor 17 to the battery 19 by switching.

  The motor 17 functions as an electric motor when the internal combustion engine 11 is automatically started as will be described later. Specifically, the motor 17 is driven after the electromagnetic clutch 13 is in the connected state. At this time, the motor 17 forcibly rotates (cranks) the crankshaft 12 of the internal combustion engine 11, and gives auxiliary torque for starting the internal combustion engine 11 to the crankshaft 12.

  The vehicle 10 is provided with an air conditioning system for adjusting the temperature in the passenger compartment. The air conditioning system includes an air conditioning passage 21 for guiding air into the vehicle interior. The air conditioning passage 21 is provided with a blower 22, an evaporator 23, and a heater core 24 in order from the upstream side in the air flow direction.

  The blower 22 pressure-feeds the air in the air conditioning passage 21 toward the passenger compartment. By the pressure feeding by the blower 22, air is taken into the air conditioning passage 21 and the air is sent into the passenger compartment.

  The evaporator 23 is for cooling the air in the air conditioning passage 21. A low temperature refrigerant flows inside the evaporator 23, and the air is cooled through heat exchange between the outer wall of the evaporator 23 cooled by the refrigerant and the air flowing in the air conditioning passage 21. Note that almost all of the air flowing in the air conditioning passage 21 passes through the portion where the evaporator 23 is disposed.

  The heater core 24 is for heating the air in the air conditioning passage 21. Engine cooling water flows inside the heater core 24 so that the air is warmed through heat exchange between the outer wall of the heater core 24 heated by the engine cooling water and the air flowing in the air conditioning passage 21. It has become. In this air conditioning system, only a part of the air flowing in the air conditioning passage 21 passes through the portion where the heater core 24 is disposed, and the remaining air flows around the heater core 24. .

  An air mix door 25 is attached to the upstream side of the heater core 24 in the air flow direction. The air mix door 25 has a flow of air abutting on the heater core 24 out of two air flows inside the air conditioning passage 21 (a flow of air abutting on the heater core 24 and a flow of air bypassing the heater core 24). It is provided so as to be able to block the portion through which the air passes. A motor 26 is connected to the air mix door 25, and the rotation position of the air mix door 25 is changed through the drive control of the motor 26, and the range where the air flow contacting the heater core 24 is blocked. Is changed. Thus, the amount of air flowing so as to contact the heater core 24 (air heated to a high temperature by the heater core 24) (contact air amount) and the air flowing around the heater core 24 (low temperature cooled by the evaporator 23) are reduced. The ratio of the amount of air) (the amount of bypass air) is adjusted, and the temperature of the air released into the passenger compartment is adjusted. In the drive control of the motor 26, the amount of contact air decreases as the rotation position of the motor 26 is changed to a position where the portion of the air flow that contacts the heater core 24 passes over a wide range, and the detour is reduced. The amount of air increases, and the temperature of the air discharged from the air outlet of the air conditioning passage 21 into the passenger compartment decreases.

  The air conditioning passage 21 has an outside air introduction port 27 for introducing air outside the vehicle interior and an inside air introduction port 28 for introducing air inside the vehicle interior as an introduction port for introducing air into the air conditioning passage 21. Is provided. An inside / outside air switching door 29 is attached in the vicinity of the outside air introduction port 27 and the inside air introduction port 28. A motor 30 is connected to the inside / outside air switching door 29, and the rotational position of the inside / outside air switching door 29 is changed through drive control of the motor 30, so that the inside / outside air inlet 27 and the inside air inlet 28. One is selectively blocked. When the outside air introduction port 27 is blocked by the inside / outside air switching door 29, the air in the vehicle compartment is introduced into the air conditioning passage 21, while the inside / outside air switching door 29 blocks the inside air introduction port 28. In the case of separation, air outside the passenger compartment is introduced into the air conditioning passage 21. In the present embodiment, the rotation position of the air mix door 25 and the rotation position of the inside / outside air switching door 29 correspond to vehicle parameters.

Further, the air conditioning passage 21 is provided with a blow-out port, and the air in the air-conditioning passage 21 is discharged into the vehicle compartment through the blow-out port.
The vehicle 10 is provided with a plurality of electronic control units including a CPU that executes various arithmetic processes, a ROM that stores programs and data necessary for the arithmetic processes, and a RAM that temporarily stores CPU calculation results. It has been. Each of these electronic control units has a data communication function, and has a structure capable of fetching stored data from other electronic units and outputting stored data to other electronic units through the same function. This data communication is executed at a communication timing every predetermined cycle.

  These electronic control units are operated by supplying power from the battery 19. In addition, output signals from various sensors are captured in each electronic control unit. Each electronic control unit executes various calculations based on these output signals, and executes various controls based on the calculation results.

  The vehicle 10 automatically stops the internal combustion engine 11 when the vehicle 10 stops at an intersection or the like in order to improve fuel consumption or reduce emissions, and automatically starts the internal combustion engine 11 at any timing during the automatic stop. It has an automatic stop and start system that makes it possible. One of the electronic control units (electronic control unit 40) mainly executes processing related to the operation of the automatic stop / start system, such as processing related to automatic stop and restart of the internal combustion engine 11. The automatic stop / start system includes the motor 17, the inverter 18, and the like in addition to the electronic control unit 40.

Further, the vehicle 10 is provided with sensors described below as sensors for detecting the driving state and the driving state of the internal combustion engine 11, and the output signals of these sensors are taken into the electronic control unit 40. ing.
A speed sensor for detecting the traveling speed of the vehicle 10.
An accelerator opening sensor for detecting the amount of depression of an accelerator pedal (not shown).
A speed sensor for detecting the rotational speed NE of the crankshaft 12 of the internal combustion engine 11.
A water temperature sensor for detecting the temperature THW of the cooling water of the internal combustion engine 11.
-An idle switch for detecting whether the accelerator pedal is depressed.
・ A brake switch for detecting whether or not the brake pedal (not shown) is depressed.

  On the other hand, another one of the plurality of electronic control units (electronic control unit 45) performs processing related to the operation of the air conditioning system, such as processing related to drive control of the motors 26 and 30 provided in the air conditioning system. Run mainly.

The vehicle 10 is provided with sensors described below as sensors for detecting the operating state of the air conditioning system, and output signals of these sensors are taken into the electronic control unit 45.
-A solar radiation sensor for detecting the intensity of solar radiation.
・ Temperature sensor for detecting the temperature in the passenger compartment.
・ Temperature sensor for detecting the temperature of outside air.
A changeover switch for switching between a state where air is introduced into the air conditioning passage 21 via the outside air introduction port 27 (so-called outside air) and a state where air is introduced via the inside air introduction port 28 (so-called inside air).
A temperature setting switch for setting a target value (set temperature Ts) for the temperature in the passenger compartment.
A position sensor 26a for detecting the relative rotational position of the motor 26.
A position sensor 30a for detecting the relative rotational position of the motor 30.

  Each of the two position sensors 26a and 30a outputs two pulse signals having different phases in accordance with the rotation of the corresponding motor, and the electronic control unit 45 determines the rotation direction of the motor from the pulse signals. The relative rotational position of the motor is obtained by obtaining and integrating the rotation amount. In this way, the electronic control unit 45 executes a calculation process for obtaining the relative rotational position so that the previous calculation result is reflected in the latest calculation result. Further, the electronic control unit 45 captures information that can determine whether the output shafts of the motors 26 and 30 are rotating or stopped. This information is also stored in the electronic control unit 40. It has been captured.

  Hereinafter, processing executed by the automatic stop / start system, specifically, processing for automatically stopping the internal combustion engine 11 (automatic stop processing) and processing for automatically starting the internal combustion engine 11 (restart processing) will be described with reference to FIGS. This will be described with reference to FIG.

  FIG. 2 is a flowchart showing the procedure of the automatic stop process, and FIG. 3 is a flowchart showing the procedure of the restart process. The series of processes shown in these flowcharts is executed by the electronic control unit 40 as an interrupt process for each predetermined period.

Here, first, the procedure of the automatic stop process will be described with reference to FIG.
As shown in FIG. 2, in this process, first, the operating states of the vehicle 10 and the internal combustion engine 11 are read through the detection signals of the various sensors (step S101).

Next, it is determined from these operating states whether or not an automatic stop condition is satisfied (step S102). Specifically, for example, it is determined that the automatic stop condition is satisfied when the following conditions (A) to (E) are all satisfied.
(A) The internal combustion engine 11 has been warmed up (the cooling water temperature THW is higher than the water temperature lower limit value).
(B) The accelerator pedal is not depressed (the idle switch is “on”).
(C) The brake pedal is depressed (the brake switch is “ON”).
(D) The vehicle 10 is stopped.
(E) After all of the above conditions (A) to (D) are satisfied, there is no history of the automatic stop of the internal combustion engine 11 being executed.

  If any one of the above conditions (A) to (E) is not satisfied (step S102: NO), the automatic stop condition is not satisfied, and the automatic stop of the internal combustion engine 11 is executed. If this is not the case, the present process is temporarily terminated.

  Thereafter, when the vehicle 10 stops at an intersection and it is determined that the automatic stop condition is satisfied (step S102: YES), for example, the fuel supply to the internal combustion engine 11 is stopped. Then, the operation of the internal combustion engine 11 is stopped (S103). Thereafter, this process is temporarily terminated.

Next, with reference to FIG. 3, the processing procedure of the restart process will be described.
As shown in FIG. 3, in this process, first, the operating states of the vehicle 10 and the internal combustion engine 11 are read through the detection signals of the various sensors (step S201).

  Next, it is determined from these operating states whether or not the restart condition is satisfied (step S202). Specifically, under the condition that the internal combustion engine 11 is in a stopped state through the automatic stop process described above, the restart condition is satisfied when any one of the above conditions (A) to (D) is not satisfied. Is determined to have been established.

  When the internal combustion engine 11 is not automatically stopped or when the internal combustion engine 11 is automatically stopped, if all of the above conditions (A) to (D) are satisfied (step) S202: NO), the restart condition is not satisfied, and it is determined that the restart condition of the internal combustion engine 11 is not satisfied.

  Thereafter, when any one of the above conditions (A) to (D) is not satisfied in the automatic stop state of the internal combustion engine 11 (step S202: YES), the internal combustion engine 11 is restarted assuming that the restart condition is satisfied. Processing is executed (step S203). Specifically, the electromagnetic clutch 13 is switched to the connected state, and the motor 17 is driven to start the cranking operation. In addition to this, well-known fuel injection control and ignition timing control are executed, and the internal combustion engine 11 is restarted. Thereafter, this process is temporarily terminated.

  Hereinafter, the process executed by the air conditioning system, specifically, the process for adjusting the temperature of the air discharged from the outlet of the air conditioning passage 21 into the vehicle interior (temperature adjustment process) will be described with reference to FIG. explain.

  FIG. 4 is a flowchart showing the processing procedure of the temperature adjustment processing, and a series of processing shown in this flowchart is executed by the electronic control unit 45 as interrupt processing for each predetermined period.

  As shown in FIG. 4, in this process, first, the outlet of the air conditioning passage 21 is set based on the set temperature Ts set through the operation of the temperature setting switch by the occupant, the temperature in the passenger compartment, the temperature of the outside air, and the solar radiation intensity. A target value (target blowout temperature Tt) for the temperature of the air released from the vehicle interior is calculated (step S301).

  Thereafter, based on the target blowing temperature Tt, a target value for the rotational position of the air mix door 25 (specifically, a target value for the rotational position of the motor 26 connected to the air mix door 25 (target rotational position Tp)). (Step S302) After driving of the motor 26 is controlled so that the target rotational position Tp and the absolute value (absolute rotational position Pa) of the rotational position of the motor 26 coincide with each other, This process is temporarily terminated.

  The absolute rotational position Pa is related based on the reference value (reference rotational position Pb) for the rotational position of the motor 26 stored in the electronic control unit 45 and the relative rotational position Pr detected by the position sensor 26a. It is calculated from the formula “Pa = Pb + Pr”. In the present embodiment, the relative rotational position Pr is stored in the RAM of the electronic control unit 45. The data stored in the RAM volatilizes and is lost when the power supply to the electronic control unit 45 is stopped when the operation of the vehicle 10 is stopped. Therefore, when the operation of the vehicle 10 and the internal combustion engine 11 is started without taking this point into consideration, the drive control of the motor 26 is executed in a state where the relative rotational position Pr and consequently the absolute rotational position Pa are deviated from the actual positions. Will be done. The situation regarding the drive control of the motor 26 at the start of operation of the vehicle 10 and the internal combustion engine 11 is the same for the motor 30.

  Based on this point, in the present embodiment, when starting the operation of the vehicle 10 and the internal combustion engine 11, a process for learning the reference rotation position Pb of the motor 26 and a process for learning the reference rotation position of the motor 30 (whichever And learning processing).

FIG. 5 shows a schematic structure around the door DR (specifically, the air mix door 25 or the inside / outside air switching door 29).
As shown in FIG. 5, in the air conditioning system, a stopper member ST is provided at a position where the door DR comes into contact with the rotation of the door DR driven by a motor MO (specifically, the motor 26 or the motor 30). Is provided. In the air conditioning system of the present embodiment, when the door DR abuts against the stopper member ST, a change in the rotation position of the door DR, and hence the rotation position of the motor MO is regulated.

  In the learning process, first, drive control of the motor MO is executed so that the door DR comes into contact with the stopper member ST (a state indicated by a solid line in FIG. 5). And when it will be in the above state, it is stored in the electronic control unit 45 so that the absolute rotation position calculated by the electronic control unit 45 when it becomes the same state becomes a predetermined position (predetermined position). The reference rotation position Pb and the relative rotation position Pr are changed. Specifically, for example, a predetermined value (for example, “0”) stored in advance in the electronic control unit 45 is stored in the reference rotation position Pb, and a predetermined value (for example, “0”) that is also stored in advance is relative. It is stored in the rotational position Pr.

  Here, when the internal combustion engine 11 is automatically started, the output shaft of the internal combustion engine 11 is cranked by the motor 17, so that the voltage of the battery 19 becomes extremely low due to power consumption by the motor 17.

  Since the electronic control unit 40 of the automatic stop / start system needs to execute a process for starting the internal combustion engine 11, the electronic control unit 40 has a structure that can withstand such a voltage drop, and when the internal combustion engine 11 is automatically started. Even it functions normally.

  On the other hand, the electronic control unit of the air conditioning system is often not structured to sufficiently withstand such a voltage drop. Therefore, in an air conditioning system using an electronic control unit having such a structure, in order to ensure the reliability of the electronic control unit, a process for optimizing the stored data when the internal combustion engine is automatically started (optimization) Process).

  In the apparatus according to the present embodiment, when the internal combustion engine 11 is automatically started, the absolute rotational position Pa of the motor 26 and the absolute rotational position of the motor 30 which are obtained by the electronic control unit 45 of the air conditioning system may be deviated from the actual positions. Therefore, the learning process described above is executed as an optimization process for eliminating the deviation.

  However, if such learning processing is executed each time the internal combustion engine 11 is automatically started, the frequency of execution of the learning processing increases, and the calculation load of the electronic control unit 45 increases accordingly. Further, in the apparatus according to the present embodiment, the air mix door 25 and the inside / outside air switching door 29 abut against the corresponding stopper member every time the learning process is executed. The door 25, the inside / outside air switching door 29, and the stopper member are likely to be deformed or broken, and this tends to cause a deterioration in the function of the air conditioning system. Furthermore, the drivability may be reduced by the sound generated when the air mix door 25 or the inside / outside air switching door 29 hits the corresponding stopper member.

  Therefore, in the present embodiment, the execution frequency of the learning process is kept low by executing a process (determination process) for determining whether or not to execute the learning process when the internal combustion engine 11 is automatically started. ing.

Hereinafter, the determination process will be described with reference to FIG.
FIG. 6 is a flowchart showing a specific processing procedure of the determination process, and a series of processes shown in this flowchart is executed by the electronic control unit 40 as an interrupt process at predetermined intervals.

  As shown in FIG. 6, in this process, first, the operating state of each motor 26, 30 (specifically, information indicating whether the motor 26, 30 is rotating or stopped) is captured (step S401). . Thereafter, it is determined whether or not the internal combustion engine 11 is being automatically started (step S402). Here, when the internal combustion engine 11 is being cranked when the restart condition is satisfied, it is determined that the internal combustion engine 11 is being automatically started.

  When the internal combustion engine 11 is automatically started, when at least one of the motor 26 and the motor 30 is rotating during a period when the internal combustion engine 11 is cranked thereafter (step S402: YES) (step S402). S403: YES) A process of turning on the history flag (step S404) is executed. When the motor 26 and the motor 30 are stopped (step S403: NO), the history flag is not turned on.

  Thereafter, it is determined whether or not the operation of the electronic control unit 45 of the air conditioning system is temporarily stopped and then resumed with the automatic start of the internal combustion engine 11 (step S405). This determination is executed based on a signal output from the electronic control unit 45 and input to the electronic control unit 40 when the above situation occurs.

  After the operation of the electronic control unit 45 is temporarily stopped due to the automatic start of the internal combustion engine 11, when the operation is not resumed (step S405: NO), this processing is temporarily terminated without executing the following processing. Is done. Note that this processing is temporarily terminated without executing the following processing when the situation is not the case, for example, when the operation of the electronic control unit 45 is not stopped even though the internal combustion engine 11 is automatically started. The

  Then, after the operation of the electronic control unit 45 is temporarily stopped along with the automatic start of the internal combustion engine 11, the present processing is repeatedly executed and the operation of the electronic control unit 45 is resumed (step S405: YES), the history flag is set. It is determined whether or not is turned on (step S406).

  When the history flag is turned on (step S406: YES), a signal requesting execution of learning processing for the motor 26 and the motor 30 is output to the electronic control unit 45 (step S407). In this case, it is highly possible that the motor 26 (or the motor 30) was rotating when the operation of the electronic control unit 45 was temporarily stopped when the internal combustion engine 11 was automatically started. The execution of the learning process is requested for the motor that is determined to be rotating in step. In response to this request, the electronic control unit 45 executes a learning process at an appropriate timing.

In addition to the output of such a signal, the history flag is turned off (step S408), and then this process is temporarily terminated.
On the other hand, when the history flag is turned off (step S406: NO), the motors 26 and 30 are operated at this time even though the operation of the electronic control unit 45 is temporarily stopped during the automatic start of the internal combustion engine 11. This processing is temporarily terminated without outputting a signal requesting the execution of the learning process.

Hereinafter, the effect | action by performing such a determination process is demonstrated, referring FIG. 7 and FIG.
7 and 8 both show an example of the relationship between the operating state of each electronic control unit 40, 45 and the absolute rotational position of the motor 26 (or motor 30). Specifically, FIG. 7 shows the above relationship when the rotational positions of the motors 26 and 30 do not change when the operation of the electronic control unit 45 is temporarily stopped as the internal combustion engine 11 is automatically started. FIG. 8 shows the above relationship when the rotational position of the motor 26 or the motor 30 changes when the operation of the electronic control unit 45 is temporarily stopped.

  In the apparatus according to the present embodiment, when the voltage of the battery 19 decreases as the internal combustion engine 11 is automatically started, and the operation of the electronic control unit 45 is temporarily stopped, the electronic control unit 45 of the air conditioning system Data (stored data) stored in the RAM of the electronic control unit 45 is retained, although the arithmetic processing may temporarily stop.

  Therefore, when the calculation process of the electronic control unit 45 is temporarily stopped during the operation of the air conditioning system in a mode in which the latest calculation result does not change (specifically, a mode in which the rotational positions of the motors 26 and 30 do not change). In this case, the stored data before the stop of the calculation process coincides with the stored data when the calculation process is resumed.

  Accordingly, in this case, as shown in FIG. 7, although the arithmetic processing of the electronic control unit 45 is temporarily stopped with the automatic start of the internal combustion engine 11 (time t11 to t12), the arithmetic processing is performed. After the restart, the absolute rotational position of the motor can be accurately calculated without performing the learning process, and the drive control of the motor can be appropriately executed.

  In the apparatus according to the present embodiment, when the internal combustion engine 11 is automatically started during the operation of the air conditioning system in such a manner that the latest calculation result does not change, that is, even if the learning process is not executed, the motor 26, When the drive control 30 can be appropriately executed (when it is determined “NO” in the process of step S406 in FIG. 6), the execution of the learning process is prohibited.

  On the other hand, when the arithmetic processing of the electronic control unit 45 is temporarily stopped during the operation of the air conditioning system in a mode in which the rotational position of the motor 26 (or the motor 30) changes, the actual rotation of the motor 26 (or the motor 30) is stopped. While the position changes, the relative rotational position stored in the electronic control unit 45 is held as it was before the calculation process was stopped.

  Therefore, as shown in FIG. 8, in this case, the actual rotational position of the motor 26 (or the motor 30) has changed during the period (time t21 to t22) in which the arithmetic processing of the electronic control unit 45 is stopped ( The calculated value and the actual value of the absolute rotational position of the motor 26 (or the motor 30) are shifted by the amount indicated by “GP” in the figure.

  In the apparatus according to the present embodiment, when the internal combustion engine 11 is automatically started during the operation of the air conditioning system in such a manner that the latest calculation result changes, that is, the calculated value and the actual value of the absolute rotational position are obtained. If they deviate (if it is determined “YES” in the process of step S406 in FIG. 6), the learning process is executed. Thereby, the calculated value of the absolute rotational position of the motors 26 and 30 can be made to coincide with the actual value, and the drive control of the motors 26 and 30 can be executed appropriately.

  As described above, in the apparatus according to the present embodiment, when the calculated value of the absolute rotational position of the motors 26 and 30 and the actual value are shifted due to the automatic stop of the internal combustion engine 11, the learning process is executed. If the operating state of the air conditioning system can be adjusted appropriately without executing the learning process, the execution of the learning process can be prohibited. Therefore, the execution frequency of the learning process can be suppressed while suppressing a decrease in the adjustment accuracy of the operating state of the air conditioning system.

  In addition, the frequency with which the air mix door 25 and the inside / outside air switching door 29 abut against the corresponding stopper member can be suppressed by the amount that the execution frequency of the learning process is suppressed. Therefore, the air mix door 25, the inside / outside air switching door 29, and the stopper member can be prevented from being deformed or lost, and the deterioration of the air conditioning system due to this can be suppressed. In addition, since the frequency of sound generated when the air mix door 25 or the inside / outside air switching door 29 hits the corresponding stopper member is suppressed, it is possible to suppress a decrease in drivability due to the generation of this sound.

  Furthermore, in the apparatus according to the present embodiment, the above-described determination process is executed by the electronic control unit 40 of the automatic stop / start system in which the operating state is stable even when the internal combustion engine 11 is automatically started. The determination process executed at the time of starting can be properly executed.

As described above, according to the present embodiment, the effects described below can be obtained.
(1) The execution frequency of the learning process can be suppressed while suppressing a decrease in the adjustment accuracy of the operating state of the air conditioning system.

  (2) The determination process executed when the internal combustion engine 11 is automatically started can be appropriately executed by the electronic control unit 40 of the automatic stop / start system in which the operating state is stable even when the internal combustion engine 11 is automatically started.

(3) Deformation and loss of the air mix door 25, the inside / outside air switching door 29, and the stopper member can be suppressed, and the function deterioration of the air conditioning system due to this can be suppressed.
The embodiment described above may be modified as follows.

  Instead of turning on the history flag when the motor 26 (or the motor 30) is rotating during the automatic start of the internal combustion engine 11, the motor 26 (or the motor 30) immediately before the start of the automatic start of the internal combustion engine 11 is performed. ) May be turned on when the history flag is rotating.

  -You may make it perform the process of the content according to a determination process by the electronic control unit 45 of an air conditioning system. In this case, whether or not the rotational position of the motor 26 (or motor 30) has changed during the period when the arithmetic processing of the electronic control unit 45 is temporarily stopped is, for example, whether the motor 26 (or motor) immediately before the internal combustion engine 11 is automatically started. It is possible to make a determination by a method such as storing the operating state of 30) or the presence or absence of the change estimated from the same state. In addition, a method of estimating from the operating state of the motor 26 (or the motor 30) when the arithmetic processing of the electronic control unit 45 is resumed, and the presence or absence of the change from the electronic control unit 40 when the arithmetic processing of the electronic control unit 45 is resumed. It is possible to determine the presence or absence of the change also by a method of obtaining data.

  The determination process according to the present embodiment is such that the motor drive control based on the relative rotational position detected by the position sensor is performed by the motor 26 and the inside / outside air switching door 29 for adjusting the rotational position of the air mix door 25. The present invention can also be applied to a device that is executed for only one of the motors 30 for adjusting the rotational position.

  In addition to the motors 26 and 30, for example, the determination processing according to the present embodiment includes an air conditioning system provided with a motor for rotating an open / close door that switches opening / closing of the air outlet of the air conditioning passage 21, The present invention can also be applied to an air conditioning system or the like provided with a motor for swinging a flap that changes the discharge direction of air from the mouth. The point is that the determination process according to the present embodiment can be applied to any air-conditioning system provided with a motor that performs drive control based on the relative rotational position detected by the position sensor.

  In place of the learning process for learning the reference rotational position of the motor, a process other than the learning process may be executed as long as the data stored in the electronic control unit can be optimized.

  -For example, a control rod for changing the passage step area (specifically, the cross-sectional area of the orifice) of the oil passage formed inside the shock absorber, a motor for changing the rotational position of the control rod, and the motor For a control system other than an air conditioning system, such as a suspension system comprising a position sensor for detecting the relative rotational position of the motor and an electronic control unit for executing drive control of the motor based on the relative rotational position. The present invention can also be applied.

  The present invention is a control provided with an actuator other than an electric motor, such as an electric actuator other than an electric motor, a hydraulic actuator, a pneumatic actuator, etc., as long as it is an actuator that performs drive control based on a relative position detected by a position sensor. It can also be applied to the system.

BRIEF DESCRIPTION OF THE DRAWINGS Schematic which shows schematic structure of one Embodiment which actualized the control apparatus of the vehicle concerning this invention. The flowchart which shows the process sequence of an automatic stop process. The flowchart which shows the process sequence of a restart process. The flowchart which shows the process sequence of a temperature control process. Schematic which shows schematic structure around a door. The flowchart which shows the process sequence of a determination process. The timing chart which shows an example of the relationship between the operating state of each electronic control unit, and the absolute rotation position of a motor. The timing chart which shows the other example of the relationship between the operating state of each electronic control unit, and the absolute rotation position of a motor.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Vehicle, 11 ... Internal combustion engine, 12 ... Crankshaft, 13 ... Electromagnetic clutch, 14 ... Pulley, 15 ... Electric belt, 16 ... Pulley, 17 ... Motor (starting motor), 18 ... Inverter, 19 ... Battery, 21 Air conditioning passage, 22 Air blower, 23 Evaporator, 24 Heater core, 25 Air mix door (air conditioning equipment), 26, 30 Motor (air conditioning motor), 26a, 30a Position sensor, 27 Outside air inlet, 28 ... Inside air introduction port, 29 ... Inside / outside air switching door (air conditioner), 40, 45 ... Electronic control unit.

Claims (5)

Computation processing for automatically stopping the operation of the internal combustion engine when the automatic stop condition is satisfied, and forcing the output shaft of the internal combustion engine when the automatic start condition is satisfied when the operation of the internal combustion engine is automatically stopped An automatic stop / start system equipped with an electronic control unit that executes a calculation process for automatically starting the internal combustion engine through driving of a starter motor that rotates, and a calculation process for changing vehicle parameters in the latest calculation result A control system having an electronic control unit that executes while reflecting a previous calculation result; a common battery that supplies power to the automatic stop start system and the control system; and The arithmetic processing of the electronic control unit of the control system is temporarily stopped due to the battery voltage drop. The vehicle control device that performs optimization processing for optimizing the data stored in the electronic control unit of the control system on the condition,
The vehicle control apparatus, wherein the optimization process is prohibited when the internal combustion engine is automatically started during operation of the control system in a mode in which the latest calculation result does not change. The vehicle control device according to claim 1,
A vehicle control apparatus, wherein an arithmetic process for prohibiting the execution of the optimization process is executed by an electronic control unit of the automatic stop / start system. The vehicle control device according to claim 1 or 2,
The vehicle comprises air conditioning equipment,
The vehicle parameter is an operating state of the air conditioner,
The control system is an air conditioning system configured to include the air conditioning device, an air conditioning motor for adjusting an operating state of the air conditioning device, and a position sensor that detects a relative rotational position of the air conditioning motor. Yes,
The electronic control unit of the air conditioning system obtains the absolute rotation position of the air conditioning motor through arithmetic processing based on the output signal of the position sensor and executes drive control of the air conditioning motor based on the obtained absolute rotation position. A control device for a vehicle, characterized in that The vehicle control device according to claim 3,
The electronic control unit of the air conditioning system obtains the absolute rotational position of the air conditioning motor based on the stored reference rotational position and the relative rotational position.
The vehicle control apparatus, wherein the optimization process is a learning process for learning the reference rotational position. The vehicle control device according to claim 4,
The air conditioning system includes a stopper member that regulates a change in the rotational position of the air conditioning motor by abutting an operation part that operates in accordance with the driving of the air conditioning motor.
In the learning process, the air conditioning motor is operated so that the operating portion is in contact with the stopper member, and the rotational position of the air conditioning motor when the operating portion is in the same state is learned as a reference rotational position. The vehicle control apparatus characterized by the above-mentioned.

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