JPH088924A - On-vehicle electronic controller - Google Patents

Abstract

PURPOSE:To prevent malfunction just after the start by optimizing a control timing when the controller starts passive processing based on data from other controller in the function distributing on-vehicle electronic controller. CONSTITUTION:A power train control arithmetic unit 2 does not start arithmetic operation of fuel jet quantity till data for fuel jet quantity control are received from a jet/ignition controller 4 and an I/O processing unit 6 even when initializing processing is finished after application of power. The unit 2 starts the arithmetic operation of the fuel jet quantity when all data are received and sends the result of arithmetic operation to the controller 4 as a fuel jet command. Furthermore, the controller 4 conducts automonous processing such as reception and transmission of a detection signal from sensors or the like after the end of initializing and starts drive control for an injector after the fuel jet command sent from the unit 2 is received. Thus, start of passive processing without receiving data from other device is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle electronic control device, and more particularly, it distributes various control processes required for driving and controlling a control target mounted on a vehicle by a plurality of control devices such as microprocessors. The present invention relates to a function-distributed electronic control device for a vehicle, in which data for vehicle control is transmitted and received between the control devices.

[0002]

2. Description of the Related Art Conventionally, various electronic control devices such as a power train control device for controlling a vehicle drive system such as an internal combustion engine or a transmission are mounted on a vehicle. In such an electronic control unit for a vehicle, a centralized electronic control unit that performs a series of control processes such as taking a detection signal from a sensor and calculating a control amount of a control target to drive the control target by one microprocessor is provided. It has been used for a long time.

On the other hand, in recent years, the control processing to be executed by the electronic control device has become complicated with the sophistication of control, and the centralized electronic control device cannot handle it. Further, as the control becomes more complicated, the number of wire harnesses connected to the electronic control device also increases, which may complicate the work for mounting the device in a vehicle.

Therefore, in recent years, in order to reduce the number of wire harnesses in the vehicle, the processing of the microprocessor, and the like, the above-described series of control processes are performed, for example, the process of fetching a detection signal from a sensor and the control amount based on the detection signal. A functionally-distributed electronic control unit has been proposed in which the control process is divided into a plurality of control processes based on the calculated control amount, and the control process is executed by a plurality of control devices. (For example, Japanese Patent Laid-Open No. 62-237895).

[0005]

By the way, in such a function-distributed electronic control device, each control device is provided with a communication function and is connected by a communication line, so that the LAN (Lo
cal area network) and transmitting and receiving the data for vehicle control obtained by each device between each device,
Since the data is shared between the respective devices, each control device has, for example, an autonomous processing element that performs processing by its own active operation, such as when processing a detection signal from a sensor, and One or both of a non-autonomous processing element that performs processing by passive operation based on data from another device, such as when a controlled object is driven by a command from the control device of Will have.

On the other hand, each control device requires a predetermined rising time after the power is turned on until the processing operation can be actually started due to initialization of control parameters, etc. This may be different for each device due to variations in the control device. As a result, a situation in which the control device having the above-mentioned non-autonomous processing element does not receive data such as a command value necessary for executing the process from another device at the time of starting the process after the power is turned on. Can happen. In such a case, the control device may start the control that does not reflect the state of the vehicle at all by using the fixed data at the time of initialization immediately after the power is turned on as it is.

The present invention has been made in view of these problems, and in the above-mentioned function-dispersed type vehicle electronic control device, a control device for performing a passive processing operation based on data from another control device is provided. By optimizing the control timing when starting the passive process immediately after startup, the purpose is to prevent erroneous control that occurs immediately after startup.

[0008]

The invention according to claim 1 made in order to achieve such an object is necessary for controlling a predetermined controlled object mounted on a vehicle, as illustrated in FIG. Various control processes for vehicle control, such as capturing of detection signals from sensors that detect various driving states, calculation of a control amount of a control target based on the detection signals, and driving of a control target according to the calculation result, are distributed. And a plurality of control processing means to be executed, and a communication means provided in each control processing means for transmitting and receiving data for vehicle control to and from other control processing means via a communication line. In the function-distributed vehicle electronic control device, among the plurality of control processing means, the control processing means for executing passive control processing based on the data transmitted from the other control processing means,
It is characterized in that a passive processing prohibiting means for prohibiting the execution of the passive processing is provided after the device is activated and until data necessary for executing the passive processing is received.

According to a second aspect of the present invention, in the electronic control unit for a vehicle according to the first aspect, the control processing means for executing the passive processing among the plurality of control processing means includes the passive processing means. When the time during which the processing prohibiting means prohibits the execution of the passive processing has passed a predetermined failure determination time or more, it is determined that the data transmission system of the device has a failure and is preset as the reception data for the passive processing execution It is characterized in that failure determination permission means for setting the set reference value and permitting execution of the passive processing is provided.

Further, the invention according to claim 3 is the electronic control device for a vehicle according to claim 1 or claim 2, wherein the control target drive is performed as the passive process among the plurality of control processing means. Further, the control processing means for executing the drive processing for the drive further includes a drive request input means for directly inputting the drive request of the controlled object from the outside, and the passive processing prohibiting means for prohibiting the execution of the drive processing. While
When the drive request of the controlled object is input from the drive request input means, and further, when the elapsed time after the input of the drive request reaches a predetermined drive determination time shorter than the failure determination time,
A drive determination permission unit that sets a preset reference value as reception data for executing the drive process and permits the execution of the drive process is provided.

According to a fourth aspect of the present invention, in the vehicle control device according to the second or third aspect, the control processing means for executing the passive processing among the plurality of control processing means includes: When the failure determination permission unit or the drive determination permission unit permits the execution of the passive processing and then receives the data necessary for the execution of the passive processing, the received data used for the execution of the passive processing is The present invention is characterized in that passive processing returning means is provided for gradually changing the passive processing from the reference value set by the judgment permitting means or the drive judgment permitting means to the actual received data and gradually returning the passive processing to the normal processing.

[0012]

In the electronic control unit for a vehicle according to the first aspect of the present invention configured as described above, among the plurality of control processing means for executing various control processing for vehicle control in a distributed manner. The control processing means for executing passive control processing based on the data transmitted from the other control processing means is provided with a passive processing prohibiting means, and the passive processing prohibiting means allows the passive processing Until the data necessary for execution is received, the execution of the passive processing is prohibited.

Therefore, according to the vehicle electronic control apparatus of the present invention, the control processing means for performing the passive processing based on the transmission data from the other control processing means is activated by the other control processing means after the activation of the apparatus. It is possible to prevent the passive processing from being executed without receiving the transmission data of, and it is possible to execute the optimal control according to the vehicle state immediately after the device is activated.

Next, in the electronic control unit for a vehicle according to a second aspect of the present invention, the control processing means for executing the passive processing among the plurality of control processing means, in other words, the control processing means provided with the passive processing prohibiting means. Is provided with a failure determination permission means, and when the time during which the passive processing prohibition means prohibits the passive processing has exceeded a predetermined failure determination time, the failure determination permission means determines that the data transmission system of the device has failed. Then, a preset reference value is set as reception data for executing the passive process, and the execution of the passive process is permitted.

That is, when the passive processing is simply prohibited by the passive processing prohibiting means, the data transmission system from the control processing means transmitting the data for the passive processing to the control processing means performing the passive processing is abnormal. If the above occurs, the passive process continues to be prohibited after the device is started, and the controlled object cannot be driven by the device. In this case, assuming that some abnormality has occurred in the data transmission system, a reference value set in advance as received data is set and the execution of passive processing is permitted, so that the control target can be driven. Of.

Therefore, according to the present invention, when an abnormality occurs in the data transmission system, it is possible to prevent the controlled object from being unable to be driven and to perform evacuation traveling of the vehicle, for example. . Next, in the vehicle electronic control unit according to claim 3, among the plurality of control processing means,
The control processing means for executing the drive processing for driving the controlled object as the passive processing is provided with the drive request input means and the drive determination permission means, and the passive processing prohibition means prohibits the execution of the drive processing. In the meantime, when a drive request of the controlled object is input from the drive request input means, and when the elapsed time after the drive request is input reaches a predetermined drive determination time shorter than the failure determination time, the drive determination permission means causes the drive processing to be performed. A preset reference value is set as reception data for execution, and execution of the drive processing is permitted.

That is, for example, when starting an internal combustion engine in an automobile, it is necessary to supply fuel to the internal combustion engine together with rotation of a starter motor by a driver's manual operation. If the drive control of the fuel injection valve to be controlled is prohibited by the passive process prohibition means due to the delay in the start-up of the transmission system or the failure of the data transmission system, the starter motor will rotate due to the manual operation of the driver. However, the internal combustion engine cannot be started.

Therefore, in the present invention, the drive request input means is provided in the control processing means for driving the controlled object so that the drive request of the controlled object can be directly input from the outside, and the drive request of the controlled object is input from this drive request input means. Is input, even if the passive process prohibiting means prohibits the execution of the driving process, after the elapse of the predetermined driving judgment time, the driving judgment permitting part presets the received data for executing the driving process. The set reference value is set to permit the execution of the driving process.

Therefore, according to the present invention, the control processing means for executing the drive processing for driving the control system can receive the data for executing the drive processing due to the failure of the data transmission system or the delay in the rising. Even if not, by inputting the drive request for the control target, it becomes possible to start the control target after a predetermined drive determination time has elapsed. Therefore, it is possible to prevent the controlled object from being difficult to start even though the vehicle occupant wants to quickly start the controlled object such as the internal combustion engine.

Further, since the drive determination time is set to be shorter than the failure determination time, in the device having the failure determination permission means, the failure determination permission means is input after the drive request of the controlled object is input. If the drive determination time elapses before the failure of the data transmission system is determined at, the drive determination permission means permits the drive processing of the controlled object. That is, the drive determination permission unit can execute the drive processing of the control target earlier than the failure determination permission unit by receiving the drive request for the control target.

Therefore, according to the present invention, as compared with the device according to the second aspect, for example, the evacuation traveling when the internal combustion engine is started to move the vehicle quickly can be started earlier. As a result, safety can be further improved. Next, in the electronic control device for a vehicle according to claim 4, in addition to the failure determination permission unit and / or the drive determination permission unit, the passive processing restoration unit is further included in the control processing unit that executes passive processing. If the failure determination permission means or the drive determination permission means permits the execution of the passive process and then the data necessary for the execution of the passive process is received,
The passive process restoration means gradually changes the received data used for executing the passive process from the reference value set by the failure determination permission means or the drive determination permission means to the actual received data.

Therefore, according to the present invention, the failure determination permission means or the drive determination permission means is a reference to the control processing means for performing passive processing in accordance with the failure determination of the data transmission system or the drive request directly input from the outside. When the passive processing based on the value is started and then the data for executing the passive processing can be received, the received data used for the passive processing is switched from the reference value to the actually received data as it is. As a result, the operation of the control processing means does not suddenly change, and the passive processing can be gradually returned to the normal processing based on the actually received data.

Therefore, when the data transmission system temporarily fails, the data transmission is delayed, or the like, the passive processing using the reference value is temporarily performed, and then the data transmission is restored to the normal state, the control processing means. The operation can be gradually returned to the normal operation using the actual received data, and the controlled object can be gradually changed to the optimum state.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. First, FIG. 2 is a block diagram showing the configuration of the entire power train control device to which the present invention is applied.

The powertrain control system of this embodiment is for controlling the vehicle drive system from the internal combustion engine to the drive wheels, such as the internal combustion engine and automatic transmission mounted on the vehicle, and is shown in FIG. As described above, the powertrain control calculation device 2 for calculating the control command value by calculating the control amount of the internal combustion engine or the transmission to be controlled, and the powertrain control calculation device 2
In accordance with the control command value from the injection / ignition control device 4 that controls the drive of the injector and the fuel pump and the energization control of the ignition coil, and the control command value from the powertrain control arithmetic device 2 according to the control command value from In accordance with a control command value from a transmission control device 8 for controlling energization of solenoids for switching a gear position and a lockup state of the engine, and a subcommand provided in an intake system of an internal combustion engine in accordance with a control command value from a power train control computing device 2. A throttle control device 10 for driving and controlling a motor that opens and closes a throttle valve, and drive controls actuators of a vehicle drive system that are not connected to the above-mentioned control devices according to control command values from the power train control computing device 2. At the same time, the detection signals from the sensors that detect various operating states of the internal combustion engine and the like that are not connected to the control devices are collected. And a writing I / O processor 6.

The respective devices 2 to 10 are connected to each other via a communication line 12 to form a so-called LAN, and the power train control is performed between the respective devices 2 to 10 via the communication line 12. By transmitting and receiving data for the purpose, the vehicle drive system including the internal combustion engine and the automatic transmission is optimally controlled.

That is, each of the above-mentioned devices 2 to 10 has a CP
It is composed of a microcomputer having a communication function including U, ROM, RAM, etc., executes various control processes for power train control according to a preset control program, and executes other control processes via the communication line 12. By performing data communication with the device, the vehicle drive system is optimally controlled according to the operating conditions of the internal combustion engine and the vehicle.

Here, the power train control arithmetic unit 2
Is provided in the passenger compartment, based on various data transmitted from other devices indicating the operating state of each part of the vehicle,
The control amount of each part of the vehicle drive system is calculated, and a passive calculation process for transmitting the calculation result to another device as a control command value is executed. Further, the powertrain control arithmetic unit 2 not only executes passive processing such as calculation and transmission of the control amount, but also switch signal input processing for taking in signals from the switches provided in the vehicle interior and installation in the vehicle interior. Also, an autonomous control process such as a display control process for turning on a display lamp to display the operation state of the device is executed.

On the other hand, the injection / ignition control device 4, the I / O processing device 6, the transmission control device 8 and the throttle control device 10
Are provided in the engine room of the vehicle, respectively.
The injection / ignition control device 4 is connected to an injector, a fuel pump, and an ignition coil, which are control targets for controlling the fuel injection amount and the ignition timing of the internal combustion engine, and an air flow detecting an intake air amount. Meter, main throttle sensor that detects the opening of the main throttle valve that opens and closes in conjunction with the accelerator pedal, knock sensor that detects knocking of the internal combustion engine, starter switch that detects the drive state of the starter, idle state of the internal combustion engine Various sensors necessary for calculating the basic control amount of the fuel injection amount and the ignition timing such as an idle switch for detection, a crank angle sensor for detecting the rotation speed of the internal combustion engine, etc. are connected.

Then, the injection / ignition control unit 4 receives the control command value from the power train control arithmetic unit 2 and executes the passive control process for controlling the injector, the fuel pump and the ignition coil as described above. Not only that, it also executes an autonomous control process in which the detection signals from the above-mentioned sensors and the battery voltage are fetched as data for transmission and transmitted to another device via the communication line 12.

Further, the transmission control device 8 is connected to solenoids for switching the shift stage and lockup state of the automatic transmission, and is necessary for calculating the basic control amount of shift control. Sensors, that is, a rotation speed sensor that detects the rotation speed of the torque converter, a shift switch that detects the position of the shift lever operated by the vehicle driver, an oil temperature sensor that detects the temperature of the hydraulic oil in the automatic transmission, etc. It is connected. Then, the transmission control device 8
In the same manner as the injection / ignition control device 4, not only receives the control command value from the powertrain control computing device 2 and executes a passive control process for energizing and controlling solenoids for gear shift control, but also It also executes an autonomous control process in which a signal from each sensor is fetched as transmission data and is transmitted to another device via the communication line 12.

Next, in the throttle control device 10,
The intake system of the internal combustion engine is connected to a motor that opens and closes a sub-throttle valve that is provided separately from the main throttle valve that opens and closes in conjunction with the accelerator pedal. The sub-throttle sensor for detection is connected. Then, the throttle control device 10 includes the above-mentioned control devices 4,
As in the case of 6, the control command value from the powertrain control arithmetic unit 2 is received, the motor is driven, and not only the passive control process of controlling the opening of the sub-throttle valve is executed but also the opening of the sub-throttle valve is performed. Also, an autonomous control process of fetching the detection signal from the sub-throttle sensor necessary for the degree control as data for transmission and transmitting it to another device via the communication line 12 is also executed.

Furthermore, among the sensors and actuators provided in the engine room, the sensors and actuators that do not need to be connected to the other devices 4, 8 and 10 are connected to the I / O processing device 6. As described above, the passive control processing for driving and controlling the actuators according to the control command value from the power train control arithmetic unit 2 and the detection signal from the sensors connected to the unit are transmitted. An autonomous control process of fetching as credit data and transmitting it to another device via the communication line 12 is executed.

The injection / ignition control device 4 is connected to the communication line 1
In the case where the communication system fails, such as disconnection of 2, a signal necessary for driving the internal combustion engine to enable the vehicle to travel, for example, a detection signal from a crank angle sensor is directly transmitted to the power train control arithmetic unit 2. It is made possible to inject /
A signal line 14 for individually transmitting such a signal is also provided between the ignition control device 4 and the power train control arithmetic device 2.

As described above, the power train control device of the present embodiment drives the actuators provided in each part of the vehicle drive system such as the internal combustion engine and the automatic transmission, and further, various operating states necessary for controlling the actuators. The control devices 4 to 10 that take in detection signals from the sensors that detect the power consumption and the power train control calculation device 2 that mainly calculates the control amount in each of the control devices 4 to 10 are provided between the respective devices 2 to 10. Connected by communication line 12, each device 2
It is configured as a distributed electronic control device that optimally controls the drive system of the vehicle by performing data communication between the ten. Then, each of the devices 2 to 10 performs a passive control process based on the data transmitted from another device (hereinafter,
It is called passive processing. ), And an autonomous control process (hereinafter referred to as autonomous process) that takes in signals from sensors and switches.
And, respectively.

By the way, the passive process executed in each of the devices 2 to 10 can be normally executed only when accurate data is received from another sensor. If 10 individually starts the normal control processing, each of the devices 2 to 10 starts the passive processing before receiving the accurate data necessary for the passive processing, and immediately after the power is turned on. However, the internal combustion engine and the automatic transmission may be controlled regardless of the operating state of the vehicle.

Therefore, in this embodiment, when the respective devices 2 to 10 are activated to execute various control processes after the power is turned on, as for the passive process, until the data necessary for the process is received from another device, The execution of passive processing is prohibited. Hereinafter, the control process executed in each of the devices 2 to 10 for prohibiting the passive process will be described with reference to the flowchart shown in FIG. The flowchart shown in FIG. 3 shows an outline of a main routine that is repeatedly executed after each of the devices 2 to 10 is powered up and started up.

As shown in FIG. 3, each of the above devices 2 to 10
When the power is turned on, first, at step 100, initialization processing for initializing control parameters used for various controls is executed. When the initialization processing is completed, at step 110, sensors and switches are mainly operated. The autonomous process of capturing the signal of and transmitting it to another device is executed.

When the autonomous process is executed in step 110, this time, in step 120, after the initialization process of step 100 is completed, in other words, after the apparatus is started, the data necessary for executing the passive process is obtained. Is received. If the data for the passive process is not received, it is determined in step 130 whether the predetermined time set as the failure determination time in advance has passed after the initialization process is completed and the apparatus is started. It is determined whether or not the predetermined time has elapsed, and the process proceeds to step 110 again.

In other words, after the device becomes ready to execute various processes such as data reception upon completion of the initialization process of step 100 (that is, after the device is activated), it is transmitted from another device. If the data for executing the passive processing has not been received and the state has not passed for a predetermined time or more, the above steps 110 to 1 are performed.
By repeatedly executing the processing of 30, only the autonomous processing is executed.

On the other hand, if it is determined in step 130 that the predetermined time has elapsed after the start of the device, that is, if the predetermined time has passed without receiving data for executing passive processing, the data Assuming that some abnormality has occurred in the communication system of, the process proceeds to step 140, and a preset reference value is set as data for passive processing,
The process proceeds to the passive process of step 210.

Next, in step 120, when it is determined that the data for the passive processing can be received after the start of the device, the process proceeds to step 150, and the latest received data required for the passive processing is read. , And proceeds to the following step 160. In step 160, it is determined whether or not a reference value has been set so far for executing the passive processing, that is, whether or not the passive processing using the reference value has been executed until now, and the passive processing by the reference value has been executed until now. If so, in step 170, the reference value is updated by adding or subtracting a predetermined value to or from the reference value so that the currently set reference value approaches the value of the received data.

Then, in step 180, it is determined whether the deviation between the updated reference value and the received data value is less than a predetermined value, and the updated reference value and the received data value are substantially the same. If it is determined that the updated reference value is not substantially the same as the value of the received data, the process proceeds to step 190, and the updated reference value is set as data for passive processing, and then the step The processing moves to passive processing 210.

On the other hand, in step 180, it is judged that the updated reference value becomes substantially the same as the value of the received data, or in step 160, the reference value has not been set so far for passive processing execution. If it is determined, the process proceeds to step 200, and the data for the passive processing is processed in step 150.
Set the latest received data read in step 2
Move to 10 passive processing.

Then, in step 210, step 1
Based on the data for passive processing set in step 40, step 190, or step 200, predetermined passive processing such as calculation of the controlled variable and driving of the controlled object is executed, and the process proceeds to step 110 again. As described above, in the vehicle powertrain control device according to the present embodiment, the signals from the sensors and the switches are fetched when the devices 2 to 10 execute various control processes for the powertrain in a distributed manner. As for the autonomous process of transmitting the data to other devices as needed, it starts immediately after the initialization process is executed after each device 2 to 10 is started, but it is transmitted from other devices. For passive processing such as calculation of control amount and driving of controlled object based on data, passive processing is executed until a predetermined time (failure determination time) has elapsed after startup until data required for passive processing is received. Prohibit

For example, in controlling the fuel injection amount of an internal combustion engine, the power train control arithmetic unit 2 transmits various operating states (cooling water temperature) of the internal combustion engine and the like transmitted from the I / O processing unit 6 and the injection / ignition control unit 4. , Battery voltage, throttle opening, etc.) based on the detected data representing the fuel injection amount from the injector, and a passive process of transmitting the fuel injection amount is executed. This is realized by executing a passive process for driving the injector based on the fuel injection amount (command value) transmitted from the vehicle. However, as shown in FIG.
Even if the initialization process is completed after the power is turned on, the power train control arithmetic unit 2 has the injection / ignition control unit 4 and the I / O unit.
The calculation of the fuel injection amount is not started until the data for controlling the fuel injection amount is received from the processing device 6, and the calculation of the fuel injection amount is started only after receiving all the data, and the calculation result is obtained. Is transmitted to the injection / ignition control device 4 as a fuel injection command value, and when the initialization process after power-on is completed, the injection / ignition control device 4 performs autonomous processing such as acquisition and transmission of detection signals from sensors. To run,
The drive control of the injector is not executed until the fuel injection command value transmitted from the powertrain control arithmetic device 2 is received, and the drive control of the injector is started after the fuel injection command value is received.

Therefore, according to this embodiment, it is possible to prevent the passive processing such as the calculation of the controlled variable and the driving of the controlled object from being started without receiving the data from the other device, and the starting of the device. Immediately after that, it becomes possible to execute the optimum control according to the vehicle state.

Further, in the present embodiment, in each of the devices 2 to 10, when the time during which the data for executing the passive processing cannot be received after the start-up reaches a predetermined time (failure determination time), the data is controlled as the control. , Set a predetermined reference value,
Passive processing is executed based on the value.

For example, in executing the fuel injection amount control of the internal combustion engine, the power train control arithmetic unit 2 is in a predetermined state in which it cannot receive data from the I / O processing unit 6 and the injection / ignition control unit 4 after being started. If it continues for more than the failure determination time (for example, 0.2 sec.), A predetermined reference value is set as the data value, for example, the cooling water temperature is 80 ° C., and the calculation of the fuel injection amount is started. / Ignition control device 4, after starting, powertrain control computing device 2
If the state where the fuel injection command value sent from the vehicle cannot be received continues for a predetermined failure determination time (for example, 0.4 sec.), A predetermined reference value is set as the fuel injection command value and injector drive control is started. To do.

Therefore, according to this embodiment, each device 2-1
When some abnormality occurs in the data transmission system between 0s and the data communication cannot be executed, the device that executes the passive process starts the passive process based on a predetermined reference value. As a result, it is possible to prevent the vehicle from being unable to be driven due to an abnormality in the data transmission system, and it is possible to implement evacuation traveling in the event of a failure.

Furthermore, in the present embodiment, when the data necessary for the passive processing can be received while the passive processing based on the reference value is being executed, the data used for the passive processing is received. Instead of switching to the data as it is, the reference value used for the passive processing is gradually updated by the processing of the above steps 170 to 180 to gradually bring the reference value used for the passive processing closer to the received data. When the reference value becomes substantially the same value as the received data, the data used for passive processing is switched to the received data.

Therefore, according to this embodiment, once the failure of the data transmission system is judged and the passive process using the reference value is being executed, the data transmission system returns to normal, When data communication can be performed between the devices 2 to 10, the control data does not suddenly change, and the control data is gradually restored to a normal value corresponding to the operating state.
The controlled object can be gradually changed to the optimum state.

Here, in the above embodiment, each device 2
10 is configured to start the passive process after receiving data for executing the passive process after starting or when a predetermined time set as the failure determination time has elapsed. Regarding the drive control of the injector executed in the device 4, if the control is started under such an execution condition, whether the fuel injection command value transmitted from the power train control calculation device 2 is received after the activation. , Predetermined failure determination time (for example, 0.4 sec.)
Until continuing, it is impossible to drive the injector, that is, to inject fuel to the internal combustion engine.
Even if the vehicle driver operates the starter switch to start the internal combustion engine and rotates the starter motor, the internal combustion engine cannot be started because fuel is not supplied to the internal combustion engine.

Therefore, in the injection / ignition control device 4, it is desirable that passive processing such as injector driving can be started even when the vehicle driver operates the starter switch to rotate the starter motor. For this purpose, in the injection / ignition control device 4, instead of the process shown in FIG. 3, the process may be executed by the procedure shown in FIG.

That is, as shown in FIG. 5, step 12
If it is determined that the data for passive processing has not been received after the start-up in 0, it is determined in step 310 whether or not the reference value for executing passive processing has already been set. If the reference value is not set (that is, if the passive process is not started), the predetermined time (for example, 0.4 sec.) Set as the failure determination time has elapsed in step 130 after the device is activated. If the predetermined time as the failure determination time has not elapsed after the start-up, it is further determined in step 320 whether the starter switch is in the ON state (that is, the vehicle starter motor is currently rotating). If the driver is trying to start the internal combustion engine) and the starter switch is in the ON state, in step 330, the ON state of the starter switch is the drive determination time. For a predetermined time (eg 50 mse
c.) It is judged whether or not the time has elapsed, and if the ON state of the starter switch has passed the predetermined time as the drive determination time, the process proceeds to step 140 for passive processing such as drive control of the injector. The reference value set in advance may be set as the data of (1) and the passive process of step 210 may be executed.

In the flowchart of FIG. 5, the processing of steps 100 to 210 is exactly the same as that of FIG. Step 3
When it is determined in 10 that the reference value has already been set, the process proceeds to step 140 in order to continuously execute the passive processing based on the reference value, and in step 320, if the starter switch is in the ON state. If it is determined that the ON state is not present, and if it is determined in step 330 that the ON state has not elapsed for the predetermined time, the process proceeds to step 110 to execute only the autonomous processing.

When the starter switch is in the ON state for a predetermined time (driving determination time), the passive process using the reference value is executed, as shown in FIG. , The initialization process is completed,
After the ignition control device 4 is activated, the starter switch is not able to receive the data for controlling the injector drive due to the delay in the rise of the data transmission system from other devices or the failure of the data transmission system. When is turned on, the drive control of the injector is started after a predetermined time (ΔT1: for example, 50 msec. Shown in the figure) set as the drive determination time has elapsed.

Therefore, according to the present embodiment, it is possible to prevent the injection / ignition control device side from easily driving the injector (that is, fuel injection) even though the vehicle driver wants to start the internal combustion engine. Therefore, the internal combustion engine can be promptly started in response to the driving request of the vehicle driver.

Further, as shown in FIG. 6, during the drive determination time ΔT1 (for example, 50 msec.) Until the starter switch is turned on and the drive control of the injector is started, a failure is determined after the apparatus is started. Failure determination time ΔT2 (for example 0.4 sec.) Before starting drive control of the injector
Compared with the case where the control is started by simply judging the failure of the data transmission system even when the data transmission system fails, the injector after the starter switch is turned on is set compared to Drive control can be started earlier. Therefore, according to the present embodiment, even when the vehicle is retracted when the data transmission system fails, the internal combustion engine is quickly started in response to the starter switch being turned on (that is, the request for starting the internal combustion engine by the vehicle driver). Therefore, the vehicle can be swept away quickly.

That is, in the injection / ignition control device, when the drive control of the internal combustion engine is executed by the control procedure shown in FIG. 3, even if the data transmission system fails, the starter switch is in the ON state. Also, since the drive control of the injector is started after the failure determination time ΔT2 has elapsed after the start of the device, the internal combustion engine start timing becomes the time t2 when the time required for the subsequent start has elapsed. As in the example, in the injection / ignition control device, when it is necessary to execute the drive control of the internal combustion engine by the control procedure shown in FIG. 5, the drive control of the injector starts immediately after the starter switch is turned on. Therefore, the start timing of the internal combustion engine after the starter switch is turned on can be advanced from time t2 to time t1, and when the data transmission system fails. The limp promptly performed at the request of a vehicle driver, it become to be able to improve the running safety of the vehicle.

Although the embodiment in which the present invention is applied to the powertrain control device for a vehicle has been described above, the present invention is not limited to such an embodiment and can take various modes. For example, the present invention is not limited to a power train control device, and various electronic controls such as a slip control device that prevents slips occurring on wheels during vehicle braking and acceleration, a suspension control device that controls vehicle height and damping force of a shock absorber, etc. It can be applied if it is a distributed type electronic control device in which the functions of the device are distributed to a plurality of control devices, and it can also be applied to a device that connects these devices with a communication line to perform integrated control of the vehicle. .

[Brief description of drawings]

FIG. 1 is a block diagram illustrating the configuration of the present invention.

FIG. 2 is a block diagram showing the overall configuration of a power train control device according to an embodiment.

FIG. 3 is a flowchart showing an outline of a control process executed in each device constituting the power train control device of the embodiment.

FIG. 4 is an explanatory diagram schematically showing data communication executed between each device and a processing operation of each device for controlling a fuel injection amount.

FIG. 5 is a flowchart illustrating another example of the control process executed by the injection / ignition control device.

6 is an explanatory diagram illustrating a start timing of injector drive control by the control process of FIG.

[Explanation of symbols]

2 ... Powertrain control arithmetic device 4 ... Injection / ignition control device 6 ... I / O processing device 8 ... Transmission control device 10 ... Throttle control device 12 ... Communication line 14 ...
Signal line

Claims (4)

[Claims] 1. A detection signal from a sensor for detecting various driving states required to control a predetermined control target mounted on a vehicle, a calculation of a control amount of the control target based on the detection signal, and the calculation. A plurality of control processing means for separately executing various control processing for vehicle control such as driving of a controlled object according to the result, and other control processing provided on each control processing means via a communication line. A communication means for transmitting and receiving vehicle control data to and from the means, and a function-distributed vehicle electronic control device comprising: a control means for transmitting data from another control processing means among the plurality of control processing means. The control processing means for executing the passive control processing based on the data includes a passive processing for prohibiting the execution of the passive processing after starting the device and until receiving the data necessary for executing the passive processing. Prohibition measures An electronic control unit for a vehicle, characterized in that: 2. The control processing means for executing the passive processing among the plurality of control processing means, the time during which the passive processing prohibiting means prohibits the execution of the passive processing exceeds a predetermined failure determination time. Then, a failure determination permitting means for determining a failure of the data transmission system of the device, setting a preset reference value as reception data for executing the passive process, and permitting execution of the passive process is provided. The electronic control device for a vehicle according to claim 1, wherein 3. The control processing means for executing the driving processing for driving the controlled object as the passive processing among the plurality of control processing means further inputs a driving request for the controlled object directly from the outside. And a drive request input means for performing the drive processing while the passive process prohibiting means prohibits the execution of the drive processing. When a predetermined drive determination time shorter than the failure determination time is reached, a reference value set in advance as reception data for executing the drive processing is set, and the drive that allows execution of the drive processing is set. The vehicle-mounted electronic control device according to claim 1 or 2, further comprising: a determination permission unit. 4. The control processing means for executing the passive processing among the plurality of control processing means, after the failure determination permission means or the drive determination permission means permits the execution of the passive processing, When the data necessary for execution is received, the reception data used for execution of the passive process is gradually changed from the reference value set by the failure determination permission means or the drive determination permission means to the actual reception data, The electronic control device for a vehicle according to claim 2 or 3, further comprising a passive process returning means for gradually returning the passive process to a normal process.