JP2003041970A - Driving method and driving system for vehicular motor, and computer-readable recording medium with driving control program for vehicular motor recorded - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a driving method for a vehicular motor, a recording medium with a driving control program for a vehicular motor recorded, and a driving system for a vehicular motor that can preferably start an accessory. SOLUTION: A power steering pump 20, an air conditioner compressor 22 and a water pump 24 are mechanically connectable appropriately to an engine 2 and a motor generator 10 by means of pulleys 40, 42, 44 and 46, a belt 48 and electromagnetic clutches 50, 52 and 54. While the engine 2 is stopped, a starting capacity of the motor generator 10 is made larger at a start of the power steering pump 20 than at a start of the air conditioner compressor 22 and the water pump 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle motor driving method, a driving device, and a computer-readable recording medium having a vehicle motor driving control program recorded therein.

[0002]

2. Description of the Related Art Conventionally, an engine that automatically stops an engine when the vehicle is stopped, such as when waiting for a signal, and restarts the engine when the vehicle starts, for the purpose of improving fuel efficiency when driving in an urban area with a high stopping rate. Automatic stop starters are known.

However, in a vehicle equipped with this automatic engine stop / start device, when the engine is stopped,
Power from the engine is not supplied to auxiliary equipment such as the air conditioner and power steering. Therefore, if it is desired to drive these auxiliary machines even when the engine is stopped,
Some kind of power source is needed to supply power to these accessories.

On the other hand, although it is different from the vehicle equipped with the above-mentioned automatic engine stop / start device, for example, Japanese Patent Laid-Open No. 11-1
Japanese Patent No. 90222 discloses a transmission system in which an output shaft of an engine and an output shaft of a starting electric motor (motor) are integrally connected to various auxiliary machines by using pulleys and belts. Therefore, by adopting such a transmission system in a vehicle equipped with the engine automatic stop / start device, it is possible to supply power to each accessory by the motor even when the engine is stopped. Become.

[0005]

As described above, the output shafts of the motor and the engine are commonly drive-coupled to the various auxiliary machines so that the auxiliary machines can be driven even when the engine is stopped. It becomes. However, the above transmission system was originally intended to drive each auxiliary machine along with the operation of the engine, and the engine is automatically stopped by the engine automatic starter or the engine is restarted. When the auxiliary machine is driven at the time, the drive is not always performed under the required conditions.

It should be noted that not only the vehicle equipped with the automatic engine stop / start device described above but also the vehicle equipped with a vehicle motor for driving the auxiliary machinery such as a hybrid vehicle, the actual situation related to the driving of the auxiliary machinery is generally It is common.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a driving method for a vehicle motor, a driving apparatus, and a driving apparatus, which enable driving in accordance with demands of auxiliary machinery. A computer-readable recording medium in which a drive control program for a vehicle motor is recorded.

[0008]

[Means for Solving the Problems] Means for achieving the above-mentioned objects and their effects will be described below. The invention according to claim 1 is a vehicle motor driving method for controlling the driving of a motor mounted in a vehicle equipped with a plurality of accessories to drive the accessories, the method comprising: The gist of the invention is to perform control so that the starting ability of the motor can be varied according to the type of auxiliary equipment required.

According to the above driving method, the starting ability of the motor is made variable according to the auxiliary machine requested to start,
It becomes possible to appropriately perform the start control for each auxiliary machine to be started.

According to a second aspect of the present invention, in the first aspect of the present invention, the auxiliary machine includes a power steering pump which is a power pump for a vehicle power steering, and when the power steering pump is requested to start, another auxiliary machine is used. The gist of the present invention is to perform control to increase the starting ability of the motor as compared with when the machine is requested to start.

In the above driving method, when the power steering pump is requested to be started, the starting ability of the motor is increased more than when the other auxiliary machines are requested to be started. This makes it possible to maintain the operability of the power steering in a suitable manner and reduce noise and vibration that accompany starting the motor when starting other auxiliary machines.

According to a third aspect of the present invention, there is provided a vehicle motor drive device for controlling the drive of a motor mounted on a vehicle equipped with a plurality of auxiliaries and driving the auxiliaries. The gist of the present invention is to include a monitoring means for monitoring the start request of the plurality of auxiliary machines and a control means for variably controlling the start capacity of the motor according to the type of the auxiliary machine for which the start request is made.

According to the above structure, the driving method according to the first aspect can be preferably implemented. According to a fourth aspect of the present invention, in the third aspect of the present invention, the accessory includes a power steering pump that is a power source of a power steering for a vehicle, and the control unit is configured such that the accessory that has made the start request is the power steering pump. The gist of the power steering pump is to perform control to increase the starting capability of the motor as compared with when a starting request is made from another auxiliary device.

According to the above structure, the driving method according to the second aspect can be preferably implemented. According to a fifth aspect of the invention, in the third or fourth aspect of the invention, the control means variably controls the starting ability of the motor by changing the amount of increase in the target rotation speed when the motor is started. What is done is the gist.

In the above arrangement, the target rotation speed is set and the starting ability of the motor is variably controlled based on the target rotation speed.
By setting the target rotation speed for each accessory in this way,
It becomes possible to more appropriately perform variable control of the starting capacity according to the auxiliary equipment.

A sixth aspect of the invention is summarized in that the plurality of auxiliary machines according to any of the third to fifth aspects are mechanically connectable to a common motor. According to the above configuration, the starting force can be supplied to the auxiliary machine by using the common motor, and thus the hardware configuration can be simplified.

A seventh aspect of the present invention is the invention according to the sixth aspect, wherein the plurality of auxiliary machines are further mechanically connectable to an engine that is a prime mover of the vehicle. To do.

In the above structure, since the plurality of accessories can be mechanically connected to the output shaft of the engine for driving the vehicle, the accessories can also be driven by the driving force of the engine.

According to the seventh aspect of the present invention, as in the eighth aspect, the engine is an internal combustion engine, and the auxiliary machine can be driven by the motor when the internal combustion engine is stopped. You may do it.

According to the above configuration, while appropriately improving the fuel consumption rate of the engine as an internal combustion engine by stopping the engine, it is possible to suitably drive the auxiliary machine while the internal combustion engine is stopped.

According to a ninth aspect of the present invention, in the eighth aspect of the present invention, when the internal combustion engine is stopped, the rotational force is applied to the internal combustion engine through the motor and the rotational force is gradually reduced. The gist of the present invention is to further include stop control means for controlling the control.

According to the above construction, when the internal combustion engine is controlled to stop, the rotational force is applied to the internal combustion engine through the motor and the rotational force is gradually reduced. Can be reduced.

According to a tenth aspect of the present invention, there is provided a recording medium in which a drive control program for a vehicle motor for driving and controlling a plurality of auxiliary devices for a vehicle is recorded, the monitoring medium monitoring a start request of the plurality of auxiliary devices. The procedure and a control procedure for performing a control to increase the starting ability of the motor when a start request is made from a specific auxiliary machine as compared with when a start request is made from another auxiliary machine are stored. Use as a summary.

By using the program, the method according to claim 3
The drive device described can be suitably configured. According to an eleventh aspect of the present invention, in the invention of the tenth aspect, the control procedure controls the starting ability in such a manner that an increase amount of a target rotation speed at the time of starting the motor is variable. Is the gist.

By using the program, the method according to claim 5
The drive device described can be suitably configured.

[0026]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment in which a vehicle motor driving method, a vehicle motor driving device, and a recording medium recording a vehicle motor drive control program according to the present invention are embodied will be described. A description will be given with reference to the drawings.

FIG. 1 schematically shows the overall configuration of the vehicle motor drive device of this embodiment. Here, it is assumed that the vehicle automatic motor starter and the automatic transmission are equipped with the vehicle motor drive device.

In FIG. 1, the output of the engine 2 which is an internal combustion engine is the torque converter 4 and the gear transmission section 6.
Is output from the output shaft 8 after undergoing a predetermined change by. As a result, the rotation speed of the output shaft 8 can be controlled at a desired rotation speed, and the vehicle can be driven at an appropriate rotation speed.

Further, the vehicle is equipped with a plurality of auxiliary machines to which driving force is supplied by the engine 2 and the motor generator 10 acting as an electric motor and a generator. Specifically, as the plurality of auxiliary machines, in the present embodiment, a power steering pump 20 and a compressor for an air conditioner (compressor for an air conditioner) 2 are used.
2 and a water pump 24.

Incidentally, the power steering pump 20
Is to pressurize the hydraulic oil that controls the power steering 30. The power steering 30 hydraulically assists the displacement of the rack 33 when the rack 33 is displaced by operating the steering wheel 31. Specifically, the rotational force of the steering wheel 31 can be transmitted to the pinion 32.
2 is engaged with the rack 33. Also, the rack 33
Is connected to a piston 35 in the power cylinder 34. Then, the hydraulic fluid pressurized by the power steering pump 20 is appropriately supplied to the left chamber 34l and the right chamber 34r partitioned by the power cylinder 34 and the piston 35 via the valve portion 36. The supply of hydraulic oil to the left chamber 34l and the right chamber 34r by the valve portion 36 is performed according to the operation of the steering wheel 31.

On the other hand, the air conditioner compressor 22 is for compressing the heat medium in the air conditioner system (the overall structure is not shown). Further, the water pump 24 is for circulating the cooling liquid in the engine 2.

These power steering pumps 20 and
The air conditioner compressor 22 and the water pump 24 are
The engine 2 and the motor generator 10 can be mechanically connected to each other, and a driving force is applied by them. Specifically, a pulley 40 that can be connected to the engine 2,
The pulley 42 connected to the motor generator 10, the pulley 44 connected to the power steering pump 20, and the pulley 46 connectable to the air conditioner compressor 22 can transmit power to each other via a belt 48.

The output shaft of the engine 2 can be mechanically connected to the pulley 40 via the electromagnetic clutch 50. That is, by controlling the operation of the electromagnetic clutch 50, the pulley 40 and the output shaft of the engine 2 are mechanically connected or disconnected. The air conditioner compressor 22 can be connected to the pulley 46 via an electromagnetic clutch 52. That is, the pulley 46 and the air conditioner compressor 2 are controlled by the operation control of the electromagnetic clutch 52.
2 is mechanically connected and not connected. Further, the water pump 24 can be connected to the motor generator 10 via the electromagnetic clutch 54. That is, by controlling the operation of the electromagnetic clutch 54, the motor generator 10 and the water pump 24 are mechanically connected or disconnected.

According to the above construction, the electromagnetic clutches 50, 5
By controlling 2, 54 or the like, the driving force of the engine 2 or the motor generator 10 can be appropriately supplied to the power steering pump 20, the air conditioner compressor 22, and the water pump 24.

The motor generator 10 includes a pulley 4
It has both a function as an electric motor (motor) for supplying a rotational force to 2 and a function as a generator for generating electric power by supplying the rotational force from the pulley 42. When the motor generator 10 functions as an electric motor, the electric power stored in the battery 14 is supplied to the motor generator 10 via the inverter 12.
The drive control of the motor generator 10 at this time is performed by the phase control of the inverter 12. On the other hand, when the motor generator 10 functions as a generator, the generated electric power is sent to the battery 14 via the inverter 12. At this time, by adjusting the amount of electric power sent to the battery 14 through the phase control of the inverter 12,
The power generation amount of the motor generator 10 is adjusted.

The engine 2, the inverter 12, the electromagnetic clutches 50, 52, 54, etc., are electronically controlled (hereinafter
It is controlled by the ECU 60). Furthermore, the ECU
The engine 60 detects the stop state of the vehicle in which the engine 2 is mounted to perform automatic stop control of the engine 2 in order to improve fuel efficiency, and the engine 2 based on the driver's intention to start.
The restart control is performed. This will be described below.

In the present embodiment, the following conditions are satisfied: (a) The ignition switch is turned on. (B) It is detected that the vehicle speed is "0". (C) It is detected that the accelerator pedal is not depressed. (D) It is detected that the brake is depressed more than a predetermined amount. When all of the above conditions are satisfied for a predetermined time or longer, the engine automatic stop control is performed.

That is, the fuel injection from the injector (not shown) and the spark discharge from the spark plug (not shown) are stopped, and the electromagnetic clutch 50 is engaged to apply the rotational force to the engine 2 by the motor generator 10. . As a result, the rotational speed of the engine 2 is once maintained at the idling rotational speed. Then, the rotation speed of the engine 2 by the motor generator 10 is gradually approached to "0" and the engine 2 is stopped. This allows the engine 2
It is possible to reduce the vibration that occurs during the stop control of.
When the engine 2 is stopped, the output shaft of the engine 2 and the pulley 40 are disconnected by disconnecting the electromagnetic clutch 50.

On the other hand, in the present embodiment, the above (b)
The automatic start control of the engine 2 is performed on the condition that any one of the conditions (1) to (4) is not satisfied. In this automatic start control, by connecting the output shaft of the engine 2 and the pulley 40 with the electromagnetic clutch 50,
A driving force is applied to the output shaft of the engine 2 by the motor generator 10. Then, when the rotation speed of the engine 2 stabilizes at the rotation speed during idling, the firing of the engine 2 is started. That is, fuel injection from the injector and spark discharge from the spark plug are started.

In order to perform such control, in this embodiment, the ignition switch 70, the vehicle speed sensor 71 for detecting the vehicle speed, the accelerator sensor 72 for detecting the depression amount of the accelerator pedal, and the brake for detecting the depression amount of the brake are used. A sensor 73 and a crank angle sensor 74 for detecting the rotation speed of the output shaft of the engine 2 are provided. Then, based on the detection results of these various sensors, the ECU 60 performs the engine automatic stop control and the automatic start control.

With this engine automatic stop / restart control function, in this embodiment, the power steering pump 2 is used.
0, air conditioner compressor 22, water pump 2
When there is a start request from 4, the following different actions are taken when the engine is moving and when the engine is automatically stopped. That is, when the engine 2 is in operation, the electromagnetic clutch 50 is appropriately connected to connect the engine 2 and the pulley 40 to supply the driving force of the engine 2 to various auxiliary machines and the motor generator 10. Incidentally, at this time, by controlling the inverter 12, the driving force of the engine 2 is appropriately extracted as electric energy by the motor generator 10 and stored in the battery 14.

On the other hand, when the engine 2 is automatically stopped,
When there is a drive request from each of the above-mentioned auxiliary machines, the motor generator 10 supplies a driving force to these auxiliary machines. That is, the motor generator 10 is rotated at a desired rotation speed by appropriately adjusting the amount of current supplied to the motor generator 10 by the phase control of the inverter 12.

However, as described above, the stop control of the engine 2 is performed by gradually reducing the rotational force applied to the engine 2 by the motor generator 10. Therefore, when the engine 2 is stopped, the motor generator 10 is stopped. The rotation speed of the output shaft of is almost "0". Here, for example, when the motor generator 10 is started in the same manner as when starting the engine 2 to supply the driving force to the auxiliary machine, the auxiliary machine is always started under the condition that meets the request of the auxiliary machine. Not necessarily.

That is, the power steering pump 20
If there is a request for activating, the steering operation will be hindered if the activation is delayed. On the other hand, when the motor generator 10 is started when a request for starting the air conditioner compressor 22 or the water pump 24 is made with the starting ability of the power steering pump 20 without causing a start delay, the occupant feels discomfort. There is. That is, the sudden activation of the motor generator 10 may cause noise or vibration.

Therefore, in this embodiment, when the power steering pump 20 is requested to be started after the engine 2 is automatically stopped, the starting ability of the motor generator 10 is increased more than when the other auxiliary devices are requested to be started. As a result, it is possible to avoid a problem that hinders the steering operation, and to reduce the above problem that an occupant feels uncomfortable due to noise when the air conditioner compressor 22 and the water pump 24 are started. You can

More specifically, a target rotation speed of the motor generator 10 is set and the motor generator 10 is startup-controlled based on the target rotation speed, and the startup capability is variably controlled by making the increase amount of the target rotation speed variable. .
Then, when the activation request of the power steering pump 20 is requested, the gradual change amount of the target rotation speed is increased as compared with the activation of the other auxiliary machines. In other words, when the power steering pump 20 is requested to be activated, the rate of increase of the target rotational speed is increased more than when the other auxiliary devices are requested to be activated.

As described above, by controlling the motor generator 10 based on the target rotation speed, the motor generator 10 and each of the above-mentioned auxiliary machines can be started more appropriately.

Specifically, the target rotation speed at the time of starting the motor generator 10 is set by a smoothing process based on the detected rotation speed (actual rotation speed) of the output shaft of the motor generator 10. That is, when the engine 2 is automatically stopped, the steady rotation speed (steady rotation speed) of the motor generator 10 when the respective accessories are driven by the stable rotation of the motor generator 10 is set for each accessory. . Then, the value obtained by subtracting the actual rotation speed from the steady rotation speed is divided by a predetermined number, and this is set as the target rotation speed. Then, based on this target rotation speed, the inverter 1
The energization control of the motor generator 10 by 2 is performed. At this time, the above-mentioned predetermined number is set to be smaller when the power steering pump 20 is requested to start than when it is requested to start other auxiliary machines.

Thus, by appropriately setting the predetermined number,
It is possible to set a gradual change amount when gradually increasing the target rotation speed of the motor generator 10. The activation request for the power steering pump 20 and the air conditioner compressor 22 is generated based on the operation mode of the steering wheel 31 and the operation request for the air conditioner by the driver. The following sensors are provided in the present embodiment in order to control various auxiliary machines in the above-described manner. -Rotation speed sensor 75: Detects the rotation speed of the output shaft of the motor generator 10. Steering angle sensor 76: detects the rotation angle of the steering wheel 31. -Air conditioner operation unit 77: provided on an instrument panel unit (not shown) of the vehicle, and inputs a driver's instruction regarding the cooling / heating state of the vehicle.

Now, the starting process of the motor generator 10 according to this embodiment will be further described with reference to FIG. FIG. 2 shows a startup processing procedure of the motor generator 10 according to the present embodiment. This process is a monitoring procedure for monitoring the start-up of a plurality of auxiliary machines, and a control to increase the starting capacity of the motor generator when there is a request to start a specific auxiliary machine, compared to when there is a start-up request from another auxiliary machine. Have procedures and. And these processing procedures are the same as those of the ECU 6 described above.
It is recorded in a ROM (Read Only Memory) (not shown) in 0 as a control program. Further, in the ECU 60, in order to set the power steering pump 20 to the specific auxiliary machine, for example, by a flag process or the like, when the activation request of the power steering pump 20 is made, it is set that there is a request to start the specific auxiliary machine. Has been done. It should be noted that this process is repeatedly executed every predetermined period.

In this series of processes, it is first determined whether or not the engine 2 is automatically stopped (step 100).
Then, when it is determined that the engine 2 is automatically stopped, it is determined whether or not there is a request for starting the power steering pump 20 (step 110). Here, when the detected value of the steering angle sensor 76 is a rotation angle equal to or larger than a predetermined value, it is determined that there is a request for starting the power steering pump 20.

When it is determined that there is a request for starting the power steering pump 20, the target rotation speed for starting the power steering pump 20 is set (step 120). This target rotation speed is set to a value obtained by dividing the steady rotation speed of the motor generator 10 set for driving the power steering pump 20 by subtracting the actual rotation speed by a constant “n”. The constant “n” is a parameter that determines the gradual change amount when increasing the target rotation speed of the motor generator 10 when the power steering pump 20 is started. This constant is set to "1" or more.

On the other hand, when it is determined in step 110 that the power steering pump 110 has not been activated, the routine proceeds to step 130. Here, it is determined whether or not there is a request to start at least one of the air conditioner compressor 22 and the water pump 24. Here, the activation request for the air conditioner compressor 22 is basically generated by the air conditioner operation unit 77 when an operation request for the air conditioner is generated. However, when the air conditioner operation unit 77 is instructed to automatically adjust the temperature (automatic air conditioner), the temperature inside the vehicle is detected, and the above EC is detected based on the detection result.
At U60, a request for starting the air conditioner compressor 22 is generated. Further, the activation request for the water pump 24 is generated under a predetermined condition in which warm air inside the vehicle is instructed by the air conditioner operation unit 77 and warm air by circulation of the engine cooling liquid is required.

Then, in step 130, a target rotational speed for starting at least one of the air conditioner compressor 22 and the water pump 24 is set (step 140). This target rotation speed is a value obtained by dividing the steady rotation speed of the motor generator 10 set for driving the air conditioner compressor 22 by subtracting the actual rotation speed by a constant “N”. Alternatively, it is set to either a value obtained by subtracting the actual rotation speed from the steady rotation speed of the motor generator 10 set for driving the water pump 24, divided by a constant “N”. When the activation request for both the air conditioner compressor 22 and the water pump 24 is generated, the target rotation speed is set based on the larger steady rotation speed. Also, this constant "N"
Is an air conditioner compressor 22 and a water pump 2
4 is a parameter that determines the gradual change amount when increasing the target rotation speed of the motor generator 10 when at least one of 4 is started. The constant "N" is set to a value larger than the constant "n".

Then, step 120 or step 14
When the target rotation speed of the motor generator 10 is set by 0, based on this, the motor generator 10 is set.
The energization control is performed (step 150), and this process is ended once. When the activation request for the air conditioner compressor 22 is made, the electromagnetic clutch 52 connects the air conditioner compressor 22 and the pulley 46. When a request to start the water pump 24 is made, the electromagnetic pump 54 connects the water pump 24 and the motor generator 10 in advance.

It should be noted that, when it is determined in step 100 that the engine 2 is not automatically stopped, or in step 130 that neither the air conditioner compressor 22 nor the water pump 24 is requested to start. At times, this processing is once terminated.

Here, FIG. 3 shows an activation mode of the motor generator 10 by the above processing. FIG. 3A shows the transition of the rotation speed when the motor generator 10 is activated in response to the activation request of the power steering pump 20. As shown in FIG. 3A, in this case, the rotation speed of the output shaft of the motor generator 10 rapidly increases. Therefore, it is possible to avoid the problem that the power steering pump 20 also starts up quickly and interferes with the steering operation.

On the other hand, FIG. 3 (b) shows the transition of the rotational speed when the motor generator 10 is started in response to a request to start at least one of the air conditioner compressor 22 and the water pump 24. As shown in FIG. 3B, in this case, the rotation speed of the output shaft of the motor generator 10 gradually increases. Therefore, noise and vibration due to a sudden change in the rotation speed of the motor generator 10 can be reduced.

According to this embodiment described above, the following effects can be obtained. (1) When the power steering pump 20 is requested to be activated, the motor generator 1 is operated more than when the other steering devices are requested to be activated.
Increased the activation ability of 0. As a result, the rotation speed of the output shaft of the motor generator 10 can be quickly increased in response to a request to start the power steering pump 20, and thus the steering operation can be suitably performed. Further, in response to a request to start at least one of the air conditioner compressor 22 and the water pump 24, the rotation speed of the output shaft of the motor generator 10 can be gently increased, and noise and vibration due to a sudden change in the rotation speed can be achieved. Can be reduced.

(2) When the motor generator 10 is started, the target rotation speed is set, and the start control of the motor generator 10 is performed based on the target rotation speed. At the same time, the target rotation speed is gradually changed according to the auxiliary machine to be started. Variable setting. As a result, when the motor generator 10 is started, it is possible to perform more appropriate control according to each auxiliary machine.

(3) The target rotation speed was calculated by the smoothing process based on the steady rotation speed set for each accessory and the actual rotation speed. This makes it possible to easily perform variable setting of the gradual change amount of the target rotation speed.

(4) In the automatic stop control of the engine 2,
After the fuel injection and the spark discharge of the spark plug are stopped, the rotation speed of the engine 2 is controlled by the motor generator 10 to gradually reduce the rotation speed. As a result, vibration can be reduced when the engine 2 is stopped.

(5) The output shaft of the motor-generator 10 can be mechanically connected to each auxiliary machine appropriately by the pulleys 40, 42, 44, 46, the belt 48, and the electromagnetic clutches 50, 52, 54. Thus, the driving force can be supplied from the motor generator 10 to each auxiliary machine with a simple configuration.

(6) Connect the output shaft of the engine 2 to the pulley 4
0, 42, 44, 46, the belt 48, and the electromagnetic clutches 50, 52, 54 make it possible to mechanically connect the auxiliary machines and the motor generator 10 appropriately. As a result, the driving force can be supplied from the engine 2 to each of the auxiliary machines and the motor generator 10 with a simple configuration.

The above embodiment may be modified and implemented as follows. The generation mode of the activation request for the power steering pump 20 is not limited to the generation mode when the rotation angle of the steering wheel 31 is equal to or greater than a predetermined value. For example, a force applied to the rack 32 or the like from the drive wheels may be detected, and the activation request may be generated when the force is equal to or larger than a predetermined value. Further, the activation request may be issued when the hydraulic pressure of the power steering pump 20 is equal to or higher than a predetermined value.

The structure of the power steering 30 is not limited to the one schematically shown in FIG. The manner of generating the activation request for the air conditioner compressor 22 and the water pump 24 is not limited to the one exemplified in the above embodiment.

The mode of gradually changing the target rotational speeds of the air conditioner compressor 22 and the water pump 24 may not be the same. The gradual change mode of the target rotation speed is not limited to the one exemplified in the above embodiment, and the target rotation speed may be increased with a constant increase width, in other words, with a constant inclination. Alternatively, the target rotation speed may be set in advance in time series. On this occasion,
When the activation request for the air conditioner compressor 22 or the water pump 24 is requested, the target rotation speed is made to rise more slowly than when the activation request for the power steering pump 20 is requested.

The activation control of the motor generator 10 in response to the activation request of the power steering pump 20 and other auxiliary equipment is not limited to the one in which the actual rotation speed is controlled on the basis of the target rotation speed being set. For example, the current supplied to the motor generator 10 may be changed without performing feedback control according to the auxiliary machine for which the activation request is generated.

The recording medium for recording the program related to the start-up process of the motor generator 10 is not limited to the ROM, but may be, for example, an electrically erasable read-only memory (EE).
Any recording medium such as PROM) may be used.

The auxiliary machines are not limited to those exemplified in the above embodiment. For example, a pump that secures the hydraulic pressure of the hydraulic oil of the gear transmission unit 6 shown in FIG. 1 when the engine 2 is stopped may be used as an auxiliary machine. Furthermore, in vehicles equipped with a vacuum servo-type brake assist mechanism that uses the intake negative pressure of the engine to generate assist force for the foot brake, the means for generating negative pressure of the brake booster during engine temporary stop control is supplemented. It may be a machine. Even in such a case, the application of the present invention in which the starting ability of the motor generator can be set according to the auxiliary machine to be started is effective. At this time, for example, the starting capacity of the motor generator is changed according to the degree of lack of negative pressure with respect to the means for generating the negative pressure of the brake booster, and the starting capacity of the motor generator is changed according to the degree of power demand of the auxiliary machine. It is desirable to do. That is, with respect to the above means, for example, when the degree of lack of negative pressure is large, the starting ability is increased,
When the degree of insufficient negative pressure is small, it is desirable to reduce noise and vibration by reducing the starting ability.

The rotational power is not limited to being applied to the engine 2 by the motor generator 10 during the automatic stop control of the engine 2 in the mode illustrated in the above embodiment. Even in such a case, when the rotation speed of the motor generator 10 is low when the engine 2 is stopped,
The application of the present invention in which the starting capacity is variably set according to the auxiliary machine to be started is effective.

The configuration for supplying power from the motor generator 10 to the auxiliary equipment is not limited to the one exemplified in the above embodiment. For example, the power steering pump 20
An electromagnetic clutch may be provided between the and the pulley 44.

The motor for supplying power to the auxiliary machine does not necessarily have to have the function of the generator, and the resultant power of the plurality of motors may be supplied to each auxiliary machine.・ Vehicles equipped with an automatic engine start / stop device as well as hybrid vehicles, for example, when equipped with a motor for starting auxiliary equipment, variably set the starting capacity according to the auxiliary equipment to be started. The application of the present invention is effective.

[Brief description of drawings]

FIG. 1 is a first embodiment of a vehicle motor drive device according to the present invention.
FIG. 3 is a block diagram showing the overall configuration of the embodiment of FIG.

FIG. 2 is an exemplary flowchart showing a procedure of a startup process of the motor generator of the embodiment.

FIG. 3 is a time chart showing a startup mode of the motor generator of the same embodiment.

[Explanation of symbols]

2 ... Engine, 4 ... Torque converter, 6 ... Gear transmission section, 8 ... Output shaft, 10 ... Motor generator, 12 ... Inverter, 14 ... Battery, 20 ... Power steering, 22 ... Air conditioner compressor, 24
… Water pump, 30… Power steering, 31…
Steering wheel, 32 ... Pinion, 33 ... Rack, 34 ... Power cylinder, 34l ... Left chamber, 34r ... Right chamber, 35 ... Piston, 36 ... Cylinder, 40, 42, 4
4, 46 ... pulleys, 48 ... belts, 50, 52, 54,
Electromagnetic clutch, 60 ... Electronic control device.

Claims (11)

[Claims] 1. A vehicle motor driving method for controlling the driving of a motor mounted on a vehicle equipped with a plurality of accessories to drive the accessories, the method comprising: A method for driving a motor for a vehicle, which is characterized in that control is performed such that a starting ability of the motor is changed according to a type of an auxiliary machine in use. 2. The auxiliary machine includes a power steering pump which is a power pump for power steering of a vehicle, and when the start request of the power steering pump is made, the starting capacity of the motor is increased more than when the start request of other auxiliary machines is made. The method for driving a vehicle motor according to claim 1, wherein the control is performed. 3. A vehicle motor drive device for controlling the driving of a motor mounted in a vehicle equipped with a plurality of accessories, wherein the plurality of accessories are provided. And a control means for variably controlling the starting capacity of the motor according to the type of the auxiliary machine for which the start request has been made. 4. The auxiliary machine includes a power steering pump which is a power source of a vehicle power steering, and the control means, when the auxiliary machine requested to start is the power steering pump, another auxiliary machine. The drive device for a vehicle motor according to claim 3, wherein control is performed to increase the starting ability of the motor as compared with when a starting request is issued from the vehicle. 5. The vehicle according to claim 3, wherein the control means variably controls the starting ability of the motor by changing the amount of increase in the target rotation speed when the motor is started. Motor drive device. 6. The drive device for a motor for a vehicle according to claim 3, wherein the plurality of accessories are mechanically connectable to a common motor. 7. The drive device for a vehicle motor according to claim 6, wherein the plurality of accessories are mechanically connectable to an engine that is a prime mover of the vehicle. 8. The drive device for a vehicle motor according to claim 7, wherein the engine is an internal combustion engine, and the auxiliary device can be driven by the motor when the internal combustion engine is stopped. 9. A drive device for a vehicle motor according to claim 8, wherein when the internal combustion engine is controlled to stop, the rotational force is applied to the internal combustion engine through the motor and the rotational force is gradually reduced. A drive device for a motor for a vehicle, further comprising stop control means for performing control. 10. A recording medium in which a drive control program for a vehicle motor for controlling the drive of a plurality of auxiliary devices for a vehicle is recorded, the monitoring procedure for monitoring a start request of the plurality of auxiliary devices, and a specific auxiliary device. And a control procedure for performing control to increase the starting capacity of the motor when there is a start request from another auxiliary machine than when there is a start request from another auxiliary machine. A computer-readable recording medium in which a drive control program is recorded. 11. A drive control program for a motor for a vehicle according to claim 10, wherein the control procedure controls the starting ability in such a manner that the amount of increase in target rotation speed at the time of starting the motor is variable. A computer-readable recording medium in which is recorded.