JP2000240481A - Vehicle control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To actively perform a failure diagnosis to perform the diagnosis of all components by providing, within a self-diagnostic means, a self-diagnostic vehicle property changing means for determining the manipulated variable of the actuator of a drive source so as to be actively detectable of failure and transmitting it to a controlled variable output means. SOLUTION: This device comprises a vehicle property input means 101 for inputting the signal from each part sensor, a driving force control means 102 for controlling and requesting the driving force distribution to a plurality of drive sources, a controlled variable arithmetic means 103 for calculating the actuator manipulated variable and a controlled variable output means 104, and a self-diagnostic means 105 for detecting the failure of a system. The self- diagnostic means 105 is provided with a self-diagnostic condition judgment means 106 and failure judgment means 108 for judging whether it is detectable of failure at present or not, and a failure memory means 109. Further, it is also provided with a self-diagnostic vehicle property changing means 107 for determining the manipulated variable of the actuator of the drive source so as to be actively detectable of failure and transmitting it to the controlled variable output means 104.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a vehicle, and more particularly, to a control device for a vehicle, which has a plurality of drive sources and adaptively uses only one drive source.
Or in vehicles that select and switch between
The present invention relates to a vehicle control device that performs a failure diagnosis of a drive source.

[0002]

2. Description of the Related Art As a self-diagnosis of a system in a conventional vehicle control device, there is one shown in the conventional system conceptual diagram of FIG. The self-diagnosis means is not directly involved in vehicle control, and the system performs normal operation based on the vehicle state resulting from the operation of another control means, the driver, or the environment surrounding the vehicle. Function is determined. When a failure is detected in a component of the system, the failure location and the content of the failure are stored, and by using the specified monitor means, the work efficiency can be improved as information at the time of vehicle repair, and minimal replacement of parts is required. Can be repaired. Furthermore, if a failure is detected in a component of the system and the original control performance of the system cannot be exhibited,
In place of the original system control, another system control to compensate for the failure is performed to maintain the safety and stability of the entire system and minimize the performance degradation.

[0003]

However, such a conventional system has a problem that it is difficult to make a condition that can be diagnosed by system components and it is difficult to diagnose a large-scale and complicated system. Furthermore, since it is not known when the conditions that can be diagnosed will be met during vehicle operation, it is necessary to monitor and determine the diagnostic conditions sequentially during the original vehicle control, and to make a diagnosis so as not to affect the original vehicle control when the conditions are met. is there. If you try to meet this requirement,
There is also a manufacturing problem that the original configuration of the control system and the diagnostic system and the relationship between the two become complicated, and that design, creation, operation confirmation, and maintenance are extremely difficult.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional problem, and has a plurality of drive sources, and a single drive source is provided according to a driving state and a vehicle state. Or, in a vehicle that is operated in combination, arbitrarily changing the operating state of a drive source that is not involved in driving, actively creating a diagnosable condition for system components, and enabling diagnosis of all components, An object of the present invention is to make a system configuration related to failure diagnosis orderly, reduce manufacturing costs, and stabilize system quality. That is, a vehicle state quantity input means for inputting a driving state and a control state of the vehicle using signals from sensors attached to the respective units, and a plurality of driving sources are adaptively used alone or in combination according to the vehicle state. Drive power management means for managing and requesting the drive power distribution to each drive source, and the drive source according to the vehicle operating condition, control condition, drive force request, and system failure condition. Control amount calculating means for calculating an actuator operation amount attached to the controller, control amount output means for actually outputting the actuator operation amount to the actuator, and self-diagnosis means for detecting a failure of the system. A self-diagnosis condition determining means for determining whether a failure can be detected from the vehicle state and the control state, and comparing the vehicle state and the control state with the system. Failure determination means for determining whether or not a failure has occurred and, if determined to have failed, for identifying a failure location, and storing the failure location and failure content when determined to have failed. A failure storage unit that performs the operation, the operation amount of an actuator attached to a drive source is determined in the self-diagnosis unit so that a failure can be actively detected. Self-diagnosis vehicle state quantity changing means to be passed to the control quantity output means is provided.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 is a system configuration diagram corresponding to the first embodiment of the present invention. In FIG. 2, a driving force management control unit 301 determines and calculates the driving force distribution of the engine 319 and the motor 326, controls the driving force distribution unit 331, and controls the engine control unit 3
07, instruct the motor control unit 313 on the required driving force value. The engine control unit 307 calculates an actuator operation amount based on signals from various sensors and outputs the operation amount to the actuator in order to output a driving force request value from the driving force management control unit 301. Similarly, the motor control unit 313 also satisfies the driving force demand.
The motor 326 is driven. Driving force distribution unit 331
Selects the drive source to be transmitted to the mission 336 from the four patterns of only the engine 319 / only the motor 326 / the combination of the engine 319 and the motor 326 / not transmit any according to the control signal from the driving force management control unit 301. And the engine-side clutch engagement solenoid 33
4. Operate the motor-side clutch engagement solenoid 335. In the ROM 310 of the engine control unit 307,
Software for controlling the engine 319 and software for diagnosing a failure are stored. MPU
Reference numeral 309 designates a signal input from the input circuit 308 as RO
The arithmetic processing is performed according to the procedure specified by the program of M310. The calculation result is converted into an actuator operation amount and output from the output circuit 312 to the actuator.
Here, as sensors for detecting a signal to be input to the input circuit 308, an ISC (Idol Speed Control) valve opening sensor 320, a crank angle sensor 321, and a throttle valve opening sensor 322 are mentioned. Actuators operated in response to signals output from the output circuit 312 include an ISC valve motor 323, an injector 324,
The throttle valve motor 325 was mentioned.

[0006] It is assumed that the driving force management control unit 301 determines that the vehicle is run only by the motor 326. The driving force management control unit 301 operates the motor-side clutch engagement solenoid 335 so that the driving force distribution unit 331 transmits only the driving force of the motor 326 to the mission 336 when the vehicle is in a running state. Engage the side clutch. Running is motor 3
Since the driving is performed only with the driving force of 26, even if the operating state of the engine 319 is arbitrarily changed as long as the occupant does not feel uncomfortable, there is no hindrance to the running of the vehicle. Here, an open / close failure diagnosis of the ISC valve motor 323 is taken as an example. The ISC valve is an actuator that adjusts an intake air amount at idling to stabilize an engine speed at idling at a target value. When the operation is performed in a direction in which the intake air amount increases, the fuel corresponding to the intake air amount is also supplied, so that the engine speed increases. On the contrary, in the direction in which the intake air amount decreases, the engine speed decreases. When the operation is performed in the direction of increasing the intake air amount, the fuel supply amount and the ignition timing are adjusted in order to suppress the increase in the engine speed and maintain the stability of the engine speed. When the operation is performed in the direction of decreasing the intake air amount, the throttle valve is adjusted to the open side via the throttle valve motor 325 in order to keep the intake air amount constant so that the engine speed does not drop too much to stop. As described above, the ISC valve motor 323 is operated between fully closed and fully opened, and the output signal of the ISC valve opening sensor 320 for detecting the degree of opening of the ISC valve motor 323 is sequentially read. The failure diagnosis of the ISC valve motor 323 is performed by checking whether the relationship between the operation amount for the ISC valve motor 323 and the signal of the ISC valve opening sensor 320 is in accordance with the relationship determined by the specification.

As described above, according to the first embodiment of the present invention, in a vehicle having a plurality of driving sources,
By utilizing the ability to arbitrarily change the driving state of the drive source that is not involved in driving the vehicle, even while the vehicle is running,
In the past, it was difficult to diagnose, or the system components that would make the system complicated to diagnose were difficult to diagnose. The configuration of the fault diagnosis system that can be performed on system components is simplified.
This has the effect.

Next, a second embodiment will be described. The system configuration diagram uses FIG. 2 used in the first embodiment. It is assumed that the driving force management control unit 301 determines that the vehicle is run only by the motor 326. The driving force management control unit 301 transmits only the driving force of the motor 326 to the driving force distribution unit 331 in the transmission 336.
When the vehicle is in the running state, the motor-side clutch engagement solenoid 335 is operated to engage the motor-side clutch. Since the traveling is performed only by the driving force of the motor 326, even if the driving state of the engine 319 is arbitrarily changed as long as the occupant does not feel uncomfortable, the traveling of the vehicle is not affected. Here, the throttle valve motor 325
Take the open / close failure diagnosis as an example. In a vehicle using only the engine 319 as the sole drive source, open / close failure diagnosis can be performed only immediately before / after the engine 319 is started and only when the actuator is energized. In a vehicle having a plurality of driving sources, not only can the driving state of a driving source not involved in driving be arbitrarily changed, but also start / stop can be arbitrarily performed. The opening / closing failure diagnosis of the throttle valve motor 325 is performed by actually operating the actuator to confirm that the throttle valve can be operated between the fully closed state and the fully opened state. If the throttle valve is fully opened while the engine is running, the engine speed will increase enough to make the occupant feel uncomfortable, so the diagnosis is started after the engine is stopped. The engine control unit 307 outputs a control signal to the throttle valve motor 325 so that the throttle valve operates between fully closed and fully open. The engine control unit 307 includes the throttle valve opening sensor 3
The failure detection of the throttle valve motor 325 is performed by reading the signal detected at 22 and checking that the target throttle valve opening corresponding to the control signal is obtained. When the diagnosis is completed or not, the engine is started again as required (in response to a control request or a request from another diagnosis).

In the second embodiment, it has been described that, for a system component which cannot be diagnosed unless a drive source not involved in driving is stopped, the drive source is stopped to perform the fault diagnosis. Other system components that cannot be diagnosed unless the drive source is operating, such as sensors / actuators using negative pressure in the intake pipe, actuators using hydraulic pressure generated by an oil pump, and engines For actuators that do not achieve the desired operation without electric power generated during rotation, actuators that directly use engine rotation via gears / pulleys, etc. By arbitrarily changing the driving state required for the diagnosis, the failure diagnosis of the system components can be performed with high accuracy without affecting the driving state of the vehicle requested by the occupant. When the vehicle is running not only with the engine failure diagnosis but also with the engine alone, the failure diagnosis can be performed for the motor by the means described above.

[0010]

As described above, according to the present invention, in a vehicle having a plurality of driving sources, even when the vehicle is running, a driving source which is not involved in driving the vehicle is arbitrarily started. If the drive source is not stopped using the fact that the drive source can be stopped, a system component that gives an occupant a sense of incongruity when the operation for diagnosis is performed, or conversely, the operation for diagnosis is performed when the drive source is not operating. The failure diagnosis can be performed for all the system components by starting / stopping the drive source as necessary for the system components that cannot be performed, and the failure diagnosis system can be easily configured. Has the effect of becoming

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a system according to the present invention.

FIG. 2 is a system configuration diagram showing a configuration of the present invention.

FIG. 3 is a conceptual diagram of a conventional system.

[Explanation of symbols]

 101 vehicle state quantity input means 102 driving force management means 103 control quantity calculation means 104 control quantity output means 105 self-diagnosis means 106 self-diagnosis condition judgment means 107 self-diagnosis vehicle state quantity change means 108 failure judgment means 109 failure storage means 201 vehicle State quantity input means 202 Driving force management means 203 Control quantity calculation means 204 Control quantity output means 205 Self-diagnosis means 206 Self-diagnosis condition judgment means 207 Failure judgment means 208 Failure storage means 301 Driving force management control unit 302 Input circuit 303 MPU (Calculation Apparatus) 304 ROM (non-volatile memory) 305 RAM (volatile memory) 306 Output circuit 307 Engine control unit 308 Input circuit 309 MPU (arithmetic unit) 310 ROM (non-volatile memory) 311 RAM (volatile memory) 312 output circuit 313 Motor control unit 314 Input circuit 315 MPU (arithmetic unit) 316 ROM (non-volatile memory) 317 RAM (volatile memory) 318 Output circuit 319 Engine 320 ISC Valve opening sensor 321 Crank angle sensor 322 Throttle valve opening sensor 323 ISC Valve motor 324 Injector 325 Throttle valve motor 326 Motor 327 Current sensor 328 Control sensor 329 Current 330 Phase 331 Drive power distribution unit 332 Engine side clutch engagement sensor 333 Motor side clutch engagement sensor 334 Engine side clutch engagement solenoid 335 Motor side clutch engagement solenoid 336 Transmission

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) B60K 8/00

Claims (1)

[Claims] 1. A vehicle state quantity input means for inputting a driving state and a control state of a vehicle using a signal from a sensor attached to each part, and a plurality of driving sources are adaptively and independently used according to the vehicle state. , Or in combination, to be involved in driving, and a driving force management means for managing and requesting a driving force distribution to each driving source, and according to a vehicle operating state, a control state, a driving force request, and a system failure state. A control amount calculating means for calculating an actuator operation amount attached to the drive source, a control amount output means for actually outputting the actuator operation amount to the actuator, and a self-diagnosis means for detecting a system failure. A self-diagnosis condition judging means for judging from the vehicle state and the control state whether or not a failure can be detected in the self-diagnosis means and a system state by comparing the vehicle state and the control state. Failure determination means for determining whether the system has failed and determining if a failure has occurred, and a failure location and failure content when determining that the system has failed. And a failure storage means for storing the following.In the self-diagnosis means, the operation amount of the actuator attached to the drive source is determined so that a failure can be actively detected. And a vehicle state quantity changing means for self-diagnosis to be passed to the control quantity output means.