JPH07334784A - Electronic controller for vehicle - Google Patents

Abstract

PURPOSE:To accurately find the quantity of variation of data on the reception side by a function decentralized type electronic vehicle controller to which plural controllers are connected by a communication line (LAN) without accurate coincidence of timing of the transmission and reception between devices which transmit and receive data requiring a variation quantity per unit time on the reception side. CONSTITUTION:On the side of an injection/ignition controller which sends a throttle opening extent required to decide the acceleration/deceleration state of an internal engine from the variation quantity per unit time on a controlled variable arithmetic unit side, sent data generated by adding a time stamp TSi to a throttle opening extent Di are sent at specific intervals of time and on the arithmetic unit side which receives the data, the time variation quantity Di of the throttle opening extent is calculated by using the time stamp added to the sent data. Consequently, the variation quantity Di can accurately be found even unless the sent data can be received on the arithmetic unit side owing to a difference in transmission/reception timing between the devices.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic control unit for a vehicle, and more particularly, it distributes various control processes necessary for controlling a control target mounted on the vehicle by a plurality of control units such as microprocessors. The present invention relates to a functionally-distributed vehicle electronic control device that transmits and receives vehicle control data 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).

By the way, in such a function-dispersed type electronic control device, each control device is provided with a communication function and is connected by a communication line to thereby form a LAN (Local Area Network).
Is formed, and data for vehicle control obtained by each device is transmitted and received between the devices, so that the data is shared between the devices. Therefore, for example, when detecting the acceleration of the internal combustion engine from the amount of change in the throttle opening per unit time on the receiving side, some data is changed by the control device side that receives the data per unit time. When the amount is required, the data transmitting side conventionally calculates the variation amount of the data and transmits the calculation result, or the receiving side transmits it. The amount of change was calculated from the data.

[0006]

However, as in the former case, when the transmission side calculates the variation amount of data and also transmits the calculation result, the amount of data transmitted and received by the entire control device is increased. However, there is a problem in that the transmission side calculates the amount of change in data, which delays the timing of data communication in the entire control device and reduces the responsiveness of control.

On the other hand, when the amount of change in data is calculated on the receiving side as in the latter case, there are no problems such as increase in communication amount and deterioration in control response, but the transmitting side and the receiving side. It is necessary to ensure that the data sent from the sending side can be received by the receiving side by accurately synchronizing the transmission / reception timing with the receiving side, and if the receiving side cannot receive the data, However, there is a problem in that the vehicle control cannot be satisfactorily executed because the amount of change in V cannot be accurately obtained.

The present invention has been made in view of these problems, and in the above-described function-dispersed type vehicle electronic control device, the amount of change per unit time is required on the receiving side between the control devices. An object of the present invention is to enable the receiving side to accurately obtain the amount of change in data when transmitting and receiving data without accurately matching the transmission and reception timings between the control devices that transmit and receive the data.

[0009]

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 signal processing arithmetic means to be executed by each control processing means, and a communication means provided in each control processing means and transmitting and receiving data for vehicle control to and from other control processing means via a communication line. In the functionally-distributed vehicle electronic control device, among the plurality of control processing means, the control processing means for transmitting the data that requires the amount of change per unit time on the receiving side includes the update time in the data. Time to show A time information giving means for giving information and transmitting from the communication means is provided, and the control processing means for receiving the data provided with the time information among the plurality of control processing means receives the data. Every time,
Deviation between the value of the data and the value of the previous reception of the data,
And a change amount calculating means for calculating the change amount of the data per unit time by obtaining the deviation of the time information given to each of these data and dividing the deviation of the data value by the deviation of the time information. It is characterized by that.

According to a second aspect of the present invention, in the electronic control unit for a vehicle according to the first aspect, the time information given to the data by the time information giving means is updated every time the data is transmitted. It is characterized by being count data. Still further, in the invention described in claim 3, in the electronic control unit for a vehicle according to claim 2, the change amount calculating means is added to the data received last time from the time information added to the data received this time. When the time information is larger, the deviation of the time information is obtained by adding the value obtained by adding 1 to the maximum value of the count data to the time information added to the data received this time.

[0011]

In the electronic control unit for a vehicle according to claim 1 configured as described above, among a plurality of control processing means for executing various control processing for vehicle control in a distributed manner, In the control processing means on the transmitting side, which transmits the data requiring the amount of change per unit time on the receiving side, the time information adding means indicates the update time of the data in the data requiring the amount of change on the receiving side. In the control processing means on the receiving side that receives the time information and transmits it from the communication means and receives the data to which the time information is added, each time the data is received, the change amount calculation means causes the value of the received data to be changed. And the value of the data received last time, and the deviation of the time information given to each of these data are obtained, and the deviation of the data value is divided by the deviation of the time information to arrive at the unit time of the data. It calculates the amount of change.

Therefore, according to the present invention, the control processing means on the transmission side for transmitting the data which requires the amount of change per unit time on the reception side and the control processing means on the reception side for receiving the data. Even if the data transmission / reception timing is deviated and the data cannot be received on the receiving side, the receiving side can accurately determine the amount of change per unit time of the data by using the time information given to the data. You will be able to ask.

Further, the control processing means on the transmitting side for transmitting this data needs to transmit the transmission data in which the time information is added to the data, but the variation amount of the data is computed and the computation result is also transmitted. Compared to sending as data, the processing load on the sending side can be significantly reduced, and the amount of data sent and received by the entire control device does not increase significantly. Without, it can be easily realized.

Further, in the electronic control unit for a vehicle according to a second aspect of the invention, in the control means on the data transmission side, the time information giving means for giving time information to the data uses the data as the time information. The count data that is updated each time is transmitted is added.

Therefore, according to the present invention, the processing operation for adding the time information is simpler than the case where the time information adding means adds the time information representing the true time such as hour, minute, and second. The data can be transmitted by adding the time information more easily.

Further, in the electronic control unit for a vehicle according to the third aspect, on the control processing means side which receives the data to which the count data is added as the time information, the change amount computing means changes the data received this time. When the time information (count data) given to the previously received data is larger than the time information (count data) given, the time information (count data) given to the data received this time is added to the count data The value obtained by adding 1 to the maximum value is added to obtain the deviation of the time information.

Therefore, according to the present invention, the upper limit of the count data is limited by the number of bits of the counter for updating the count data on the side of the control processing means for adding the count data as the time information and transmitting the data. Even when the data becomes the maximum value and the next count data becomes the count value “0”, the deviation of the data update time, and thus the time change amount of the data, is accurately obtained from the count data. Will be able to.

As described above, according to the present invention, even if the count data is repeatedly updated as 0, 1, ..., Maximum value, 0, 1, ... Since the maximum value of the count data can be accurately determined, the capacity of the data to which the time information is added can be made smaller by setting the maximum value of the count data to the minimum value that can accurately calculate the temporal change amount of the data. Therefore, it is possible to further suppress the increase in communication volume caused by adding the time information to the transmission data.

[0019]

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 device 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 amount of the internal combustion engine or the transmission to be controlled to generate the control command value, and the powertrain control calculation device 2
The injector / fuel pump is driven and controlled in accordance with the control command value from the injection / ignition control device 4 for controlling the energization of the ignition coil and the control command value from the powertrain control arithmetic device 2 is used to automatically change the speed. In accordance with a control command value from a transmission control device 8 for controlling energization of solenoids for switching gears and lockup states 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 each of the above control devices according to a control command value from a 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 devices 2 to 10 are connected to each other via a communication line 12 to form a so-called LAN, and data for power train control between the devices via the communication line 12 is used. By transmitting and receiving, the vehicle drive system including an internal combustion engine and an automatic transmission is optimally controlled.

That is, each of the above 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 vehicle compartment, and switches and indicator lamps provided in the vehicle compartment are connected. Then, the power train control arithmetic unit receives a signal from the connected switches, a data input process for receiving signals from the other devices, and a data reception process for receiving various data such as detection signals indicating driving states of various parts of the vehicle transmitted from other devices. , The control amount calculation process for calculating the control amount of each part of the vehicle drive system based on the received data and the input data from the switches, the data transmission process for transmitting the calculation result to another device as a control command value, and the vehicle interior Various processes such as a display control process for turning on a provided display lamp and displaying an operation state of the device are 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.
Here, 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 detects the intake air amount. Air flow 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 detecting the engine speed, a crank angle sensor for detecting the rotation speed of the internal combustion engine, etc. are connected.

Then, the injection / ignition control device 4 receives a detection signal from each of the above sensors and a signal input process for taking in a battery voltage, a control command value from the power train control arithmetic device 2 and transmission data from another device. Data reception processing to be received, drive control processing for driving and controlling the injector, fuel pump, and ignition coil based on the data such as the control command value obtained in these signal input processing and data reception processing, and in each of these processing A data transmission process of transmitting the obtained predetermined data to another device via the communication line 12 is executed.

Further, the transmission control device 8 is connected with solenoids for switching the shift stage and lockup state of the automatic transmission, and is necessary for calculating the basic control amount of the 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 receives a detection signal from each of the above sensors, receives a control command value from the power train control arithmetic unit 2 and receives data from another device. Processing, drive control processing for energizing solenoids for gear shift control based on data such as control command values obtained by these signal input processing and data reception processing, and predetermined data obtained by these processings Is executed via the communication line 12 to another device.

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.

The throttle control device 10 receives a detection signal from the sub-throttle sensor, inputs a signal, receives a control command value from the power train control arithmetic unit 2, and receives data from another device.
The drive control process for controlling the opening of the sub-throttle valve by driving the motor based on the data such as the control command value obtained in the signal input process and the data reception process, and the predetermined control obtained in each process. A data transmission process of transmitting data to another device via the communication line 12 is executed.

Further, among the sensors and actuators provided in the engine room, the I / O processing device 6 is connected with sensors and actuators which do not need to be connected to other devices 4, 8 and 10. Has been done. And I
In the / O processing device 6, a signal input process for taking in detection signals from these sensors, a data reception process for receiving a control command value from the power train control arithmetic device 2 and transmission data from another device, and these signal inputs. Processing and drive control processing for driving and controlling actuators based on data such as control command values obtained in the data reception processing, and predetermined data obtained in each of these processings via communication line 12 to another device. The data transmission process to be transmitted to 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. A signal line 14 for individually transmitting such a signal is provided between the injection / ignition control device 4 and the power train control arithmetic device 2.
Is also provided.

As described above, the power train control device according to 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. It is configured as a distributed electronic control device that optimally controls the drive system of the vehicle by connecting with the communication line 12 and transmitting and receiving data between the devices.

By the way, between these respective devices 2 to 10,
Data that requires the amount of change per unit time on the side of the device that receives the data (for example, on the side of the power train control computing device 2 to determine the acceleration or deceleration state of the internal combustion engine and to correct the fuel injection amount, Transmission / reception of data (throttle opening, intake air amount, etc.) that requires a change amount per unit time is also executed. However, in the present embodiment, when transmitting / receiving such data, the transmitting side Then
Time information (time stamp) indicating the update time of the data is added to the data and transmitted, and the receiving side that requires the amount of change per unit time of this data, based on the time stamp and the data value, The amount of change per unit time is calculated.

The data transmission processing and the data reception processing executed on the transmission side and the reception side in transmitting and receiving such data will be described below with reference to the flowcharts shown in FIGS. 3 and 4. First, FIG. 3 shows, for example, an injection / ignition control device 4 that transmits the throttle opening and intake air amount necessary for the acceleration / deceleration determination of the internal combustion engine to the power train control arithmetic device 2, etc. 7 is a flowchart showing a data transmission process executed to transmit the data in a device that transmits data that requires a change amount per hit.

As shown in FIG. 3, this data transmission process is
This is a process executed as a timer interrupt process for each predetermined time in the transmission side device. First, in step 110, data to be transmitted on the communication line 12 in the transmission process, such as throttle opening and intake air amount. D is read, and in the following step 120, the time stamp TS as time information indicating the update time of the data is incremented.

This time stamp TS is initialized to a value "0" when the apparatus is started up, and is then incremented in step 120 and updated sequentially each time the processing is executed, so-called. When there is count data and the processing of step 120 for updating this time stamp TS is completed, it is determined in step 130 whether the value of this time stamp TS has exceeded a preset maximum value TSmax (for example, value 7). To do.

Next, when it is determined in step 130 that the value of the time stamp TS exceeds the maximum value TSmax, in step 140, the initial value "0" is set to the time stamp TS. Then, if it is determined that the value of the time stamp TS does not exceed the maximum value TSmax (that is, it is less than or equal to the maximum value TSmax), the process directly proceeds to step 150.

Then, in step 150, step 1
Data (D + TS) added to the data D read in 10 with the time stamp TS set to the initial value "0" when the updated value exceeds the maximum value TSmax in step 120 The data is transmitted as transmission data, and the process ends.

On the other hand, FIG. 4 shows a power train control for performing acceleration / deceleration correction of the fuel injection amount by performing acceleration / deceleration determination of the internal combustion engine based on, for example, the amount of change per unit time such as the throttle opening and intake air amount. 7 is a flowchart showing a data receiving process executed to receive the data on the side of the device that needs the amount of change per unit time of the data transmitted from another device such as the arithmetic unit 2.

This data reception process is a process executed as an interrupt process when a data reception request is generated in each device. As shown in FIG. 4, when this data reception process is started, first, In step 210, the desired data (D + TS) in which the time stamp TS is added to the data D transmitted from the transmitting side is received, and the following step 220
At step 210, the deviation (TSn-TSm) between the time stamp TSn in the data received this time and the time stamp TSm in the data received last time is calculated, and the value (Tn) is calculated.
(Sn-TSm) and "0" are compared in magnitude.

When it is determined in step 220 that the deviation (TSn-TSm) of the time stamp TS is larger than "0" and is a positive value, the process proceeds to step 230 and proceeds to step 210. Then, the deviation (Dn-Dm) between the data value Dn in the data received this time and the data value Dm in the data received last time is calculated, and this value (Dn-Dm) is deviated from the calculated time stamp TS ( By dividing by (TSn-TSm), the received data D can be calculated by the following equation (1).
Change amount ΔD per unit time is calculated, and ΔD = (Dn-Dm) / (TSn-TSm) (1) In the subsequent step 250, the calculated deviation ΔD is used as control deviation data. After storing in a predetermined area of the RAM, the processing is temporarily terminated.

On the other hand, when it is determined in step 220 that the deviation (TSn-TSm) of the time stamp TS is smaller than "0" and is a negative value, the process proceeds to step 240. Then, in step 240, the maximum value T of the time stamp TS is first added to the time stamp TSn received this time.
The deviation (TSmax + 1 + TSn−) of the time stamp TS is obtained by adding a value (TSmax + 1) obtained by adding the value 1 to Smax (for example, the value 7) and subtracting the value of the time stamp TSm in the previously received data from the value (TSn + TSmax + 1). T
Sm) is calculated, and in step 210, the deviation (Dn-Dm) between the data value Dn in the data received this time and the data value Dm in the data received last time is calculated, and this value (Dn
n-Dm) is divided by the deviation (TSmax + 1 + TSn-TSm) of the calculated time stamp TS,
The change amount ΔD of the received data D per unit time is calculated as in the following equation (2).

ΔD = (Dn−Dm) / (TSn + TSmax + 1−TSm) (2) Then, in the following step 250, the calculated deviation Δ
After D is stored in a predetermined area of the RAM as deviation data used for control, the process is once ended. That is,
The time stamp TS is count data that is incremented every time data is updated and transmitted on the transmitting side. When the time stamp TS exceeds the maximum value TSmax, it is returned to the initial value 0, and is added to the received data. The deviation (TSn-TSm) of the obtained time stamps TS is calculated,
Based on this, the amount of change in the received data D per unit time Δ
If D is calculated, when the deviation (TSn-TSm) of the time stamp TS becomes a negative value, the change amount ΔD of the received data D cannot be obtained.

Therefore, in this embodiment, the time stamp T
When the deviation (TSn-TSm) of S becomes a negative value, the value of the time stamp TS in the data received this time is the value of the time stamp TS after the last received data in step 240 above. Is a value after the initial value 0 has been returned, and the value obtained by adding 1 to the maximum value TSmax of the time stamp TS in the data received this time is added to the initial value of the time stamp TS. The value (TSn + TSmax + 1) when not returned to 0 is obtained, and the deviation (TSmax + 1 + TSn) of the time stamp TS from this value and the value of the time stamp TSm in the previously received data is obtained.
By recalculating −TSm), the change amount ΔD of the received data D per unit time is calculated as in the above equation (2).

If it is determined in step 220 that the deviation (TSn-TSm) of the time stamps TS is "0", that is, if it is determined that TSn = TSm, then the processing is directly performed. finish. As described above, in the power train control device of the present embodiment, the device side that transmits the data D that requires the amount of change per unit time on the receiving side transmits the data D when transmitting the data D. A time stamp T indicating the transmission timing in D
The transmission data (D + TS) to which S is added is configured to be transmitted on the communication line 12, and on the device side receiving this data (D + TS), the time stamp TSn in the data received this time and the data in the previously received data The deviation (TSn-TSm) from the time stamp TSm is calculated, and this deviation (TSn-TSm)
If is a positive value, the received data D
Change amount per unit time is calculated, and the deviation (TSn-TSm)
Is a negative value, the amount of change of the received data D per unit time is obtained by using the above equation (2).

Therefore, according to the present embodiment, for example, even if the transmission side and the reception side of the data D have different transmission / reception timings and the reception side cannot receive the data D, the reception side does not receive the data D. Time stamp T given to D
The amount of change of the data D per unit time can be accurately obtained by using S.

That is, for example, in FIG. 5, the injection / ignition control device 4 which receives the detection signal from the main throttle sensor and transmits the detection data (that is, the throttle opening) Di and the data Di are received. This is performed with the power train control arithmetic unit 2 that determines the acceleration and deceleration states of the internal combustion engine from the amount of change in that value (throttle opening) per unit time and corrects the fuel injection amount of the internal combustion engine. The injection / ignition control device 4 side, which represents the transmission / reception operation of the throttle opening data Di, transmits the throttle opening data Di. As the time stamp TSi to be added to the data Di, the maximum value TSmax is a time stamp TSi. FIG. 4 is an explanatory diagram of a case in which the injection / ignition control device 4 is used in the present embodiment, as is clear from this figure. After starting, the throttle opening data Di at predetermined time intervals (D0, D1, D2, ...) are sequentially transmitted.

On the side of the power train control arithmetic unit 2 which receives the throttle opening data Di, the first received throttle opening data Di (D0 in the figure) after the start is compared with the previously received data. Since the time change amount ΔDi of the throttle opening is not calculated, since the throttle opening data Di is received, the previously received data Di (D0, D2, D4,
Value of the time stamp TS i given to (...)
4, ...) and the data Di (D2, D4, D) received this time
5, ..., the value of the time stamp TSi added to (2,
4, 5, ...) And the deviation of each data Di, the change amount ΔDi of the throttle opening per unit time is calculated.

Therefore, like the throttle opening degree data D1, D3, D6, ... Shown in FIG. 5, the throttle opening degree data Di which cannot be received by the power train control arithmetic unit 2 side.
Is present, on the side of the powertrain control computing device 2,
A change amount (time change amount) ΔDi of the throttle opening per unit time can be accurately obtained, and the acceleration / deceleration state of the internal combustion engine can be accurately determined from the time change amount ΔDi.
This can be reflected in the fuel injection amount, and the fuel injection amount control can be accurately executed.

Further, in the present embodiment, the timing at which the transmission data D is read and transmitted as the time information given to the transmission data D (that is, the update timing of the transmission data D).
Use the time stamp TS that is incremented by
Moreover, when the time stamp TS exceeds the preset maximum value TSmax (for example, a value of 7), the initial value 0 is restored, so that the injection / ignition control device 4 for transmitting the data with the time information is transmitted. On the transmitting device side such as, it is not necessary to perform a complicated process to add the time information,
There is no longer a long time for data transmission.
Further, since the value of the time stamp TS to be added to the data is a value from 0 to the maximum value TSmax, it is possible to suppress the increase of the communication amount of the data communication performed between the respective devices by adding the time stamp. It is possible,
It is also possible to reduce the burden on the data communication system.

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 various modes can be adopted. 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 a 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 diagram showing a data transmission process executed by a device that transmits data to a device that requires a change amount of data per unit time in the device that constitutes the power train control device of the embodiment. It is a flowchart.

FIG. 4 is a flowchart showing a data reception process executed by the device that determines the amount of change in received data per unit time in the device that constitutes the power train control device of the embodiment.

FIG. 5 is an explanatory diagram illustrating an example of an operation when transmitting and receiving throttle opening data between the injection / ignition control device and the powertrain control arithmetic device of the embodiment.

[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

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Claims (3)

[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 signal processing arithmetic means for respectively performing various control processing for vehicle control such as driving of a controlled object according to the result, and a plurality of signal processing arithmetic means, and each control processing means are provided with other control processing via a communication line. A function-distributed vehicle electronic control device comprising: communication means for transmitting and receiving vehicle control data to and from a processing means, wherein among the plurality of control processing means, a change per unit time at a receiving side The control processing means for transmitting the data requiring the quantity is provided with time information giving means for giving time information indicating the update time to the data and causing the data to be transmitted from the communication means. Among them, the control processing means for receiving the data to which the time information is added, each time the data is received, the deviation between the value of the data and the value of the previous reception of the data, and each of these data. A change amount calculating means for calculating a change amount of the above-mentioned data per unit time by obtaining a deviation of the time information given to the data and dividing the deviation of the data value by the deviation of the time information. Electronic control unit for a vehicle. 2. The vehicle electronic control unit according to claim 1, wherein the time information given to the data by the time information giving means is count data updated every time the data is transmitted. 3. The time information given to the data received this time, when the time information given to the previously received data is larger than the time information given to the data received this time. 3. The vehicle electronic control unit according to claim 2, wherein the deviation of the time information is obtained by adding a value obtained by adding 1 to the maximum value of the count data to.