JPH0914044A - Electronic control device for automobile - Google Patents

Abstract

PURPOSE: To obtain an electronic control device for an automobile which can set a parameter easily without providing a special constitution. CONSTITUTION: In an electronic control device 13 which is a microcomputer system, for example, a winker switch 11 and an accelerator sensor 12 are connected to detect a usual running state of an automobile. When the mode switching switch 14 of the electronic control device 13 is turned ON, one parameter out of two kinds is selected in response to whether the set of the winker switch 11 is left turn or right turn and when the mode switching switch 14 is turned OFF, the parameter for controlling and watching used at the usual running time can be changed. Further, specific one parameter among various kinds of parameters can be also selected by the pedaling amount of an accelerator detected by the accelerator sensor 12.

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 an automobile, and more particularly to an electronic control unit for an automobile in which parameters can be easily set without having a special structure.

[0002]

2. Description of the Related Art In recent years, electronic control devices using microcomputers have been widely applied to automobiles.
It is possible to finely change the control constant with respect to the type of vehicle, variations of individual vehicles, or changes with time. However, it is necessary to input the control constants as data to the electronic control unit according to the variations of the vehicle type or individual vehicles, or to rewrite the control constants according to the usage time and usage environment, and to initialize the control variables and monitoring data. It is not always easy to carry out, and the productivity of the electronic control unit cannot be improved.

Therefore, it is general to incorporate several kinds of data into an electronic control device in advance and select the data according to the type of vehicle, individual variation or mileage.

[0004]

However, in the conventional electronic control device, an input device (for example, a ten-key switch or a potentiometer) for selecting data other than the mode change switch for switching between the normal use mode and the data setting mode. Etc.), a dedicated input terminal, a connector, a harness, etc. are required, so that a complicated structure cannot be avoided.

On the other hand, not only various switches such as a door switch and a winker switch are installed in an automobile and input to an electronic control unit, but also analog sensors such as an accelerator sensor and a vehicle speed sensor are input to the electronic control unit. ing. And, in the adjustment state in the production factory or the repair shop, the functions of these ordinary switches or sensors are not used.

The present invention has been made in view of the above, and an object of the present invention is to provide an electronic control unit for an automobile, which does not have a special structure and can easily set parameters.

[0007]

An electronic control unit for a vehicle according to the present invention includes a driving state detecting means for detecting a normal driving state of the vehicle, a storage means for storing a plurality of sets of parameters, and a vehicle The mode switching means for switching the operation mode of the electronic control device between the normal operation mode and the parameter setting mode, and the above-mentioned operation according to the state detected by the operation state detecting means when the mode setting means sets the parameter setting mode. Parameter setting means for selecting and setting a set of parameters from a plurality of sets of parameters stored in the storage means, a state detected by the operating state detecting means when the normal operation mode is set by the mode switching means, and The normal operation of the vehicle is based on the set of parameters set by the parameter setting means. Run the control and monitoring of time, or control and
Normal operation control monitoring means for initializing monitoring data,
Is provided.

[0008]

In the vehicle electronic control device according to the present invention, when the electronic control device is set in the parameter setting mode, the operating state detecting means equipped in the vehicle to detect the normal operating state of the vehicle. Parameters used for controlling and monitoring the vehicle in the normal driving state are selected and set according to the detection result by the.

[0009]

1 is a block diagram of an embodiment of an electronic control unit for an automobile according to the present invention, which is equipped with a turn signal switch 11 and an accelerator sensor 12 as means for detecting a driving state. The operating state detected by these is read into the electronic control unit 13 which is a microcomputer system, and the electronic control unit 13 is composed of a CPU 132, a memory 133 and an input interface 134 centering on the data bus 131.

The input interface 134 is connected with the winker switch 11 and the accelerator sensor 12 as well as the mode changeover switch 14 for changing over the operation mode of the electronic control unit. FIG. 2 is a flowchart of a main routine executed by the electronic control unit, which is executed as, for example, interrupt processing at regular time intervals.

At step 21, it is determined whether the mode changeover switch 14 is on, and the process proceeds to affirmative determination 22 to execute the parameter setting process and end this routine. When a negative determination is made in step 21, the routine proceeds to step 23, where normal control monitoring processing is executed and this routine is ended. In the normal control monitoring process, the winker switch 11 has its original function, that is, the winker switch controls blinking of the turn signal lamp for left turn or right turn.

The accelerator sensor 12 is used to detect the depression amount of an accelerator pedal (not shown).
FIG. 3 is a flowchart of the first parameter setting process executed in step 22 when the mode changeover switch 14 is set to the parameter setting mode. In step 31, it is determined whether the turn signal switch 11 is set to the left turn. judge.

When an affirmative decision is made in step 31, the routine proceeds to step 32, where the first parameter is selected as a parameter for normal control monitoring processing. On the contrary, when a negative determination is made in step 31, the process proceeds to step 33, and the second parameter is selected as a parameter for normal control monitoring processing. In addition, the parameter setting for normal control monitoring processing is
It is assumed that the mode switching switch 14 is switched from on to off.

For example, the electronic control unit 13 is set with the first parameter used in the normal control monitoring process in the initial stage of use and the second parameter used in the normal control monitoring process after a certain use time has elapsed. And Therefore, at the time of shipment from the production factory, the turn signal switch 11 is set to the left after turning on the mode changeover switch 14, and the mode changeover switch 14 is turned off to select the first parameter for the normal control monitoring process.

If the use of the vehicle renders the first parameter incompatible with the normal control monitoring process,
Mode change switch 14
After turning on, the turn signal switch 11 can be set to the right turn, and then the mode changeover switch 14 can be turned off to change to the second parameter. Further, instead of the second parameter, data for initialization can be set to initialize the control variables / monitoring data.

The turn signal switch 1 is used in the above embodiment.
Although the parameter is switched by only one, a plurality of switches may be used. For example, the blinker switch 11 and the on / off switch of the air conditioner may be combined to select four types of parameters. That is, if the turn signal is turned left and the air conditioner is on, the first parameter is set. If the turn signal is turned left and the air conditioner is turned off, the second parameter is set.
The third parameter can be selected when the turn signal right turn is set and the air conditioner is on, and the fourth parameter can be selected when the turn signal right turn is set and the air conditioner is turned off.

In addition to the turn signal switch 11 and the on / off switch of the air conditioner, a brake switch, a lamp switch, a wiper switch, a shift lever of a transmission, etc. can be used. FIG. 4 shows step 22
6 is a flowchart of a second parameter setting process executed in step S1, in which parameters are selected according to the amount of depression of the accelerator sensor 12.

That is, in step 41, it is judged whether or not the actual depression amount θ of the accelerator sensor 12 is less than or equal to the first threshold value θ ₁ , and if a positive judgment is made, step 42
Proceed to and select the first parameter. When a negative determination is made in step 41, the routine proceeds to step 43, where it is determined whether or not the depression amount θ is between the first threshold θ ₁ and the second threshold θ ₂ , and when a positive determination is made. Step 44
Proceed to and select the second parameter.

When a negative decision is made in step 43, the routine proceeds to step 45, where it is decided whether or not the depression amount θ is between the second threshold value θ ₂ and the third threshold value θ ₃ , and an affirmative decision is made. If so, the process proceeds to step 46 to select the third parameter. When a negative determination is made in step 45, that is, when the depression amount θ is larger than the third threshold value θ ₃ , the process proceeds to step 47 and the fourth parameter is selected.

It is also possible to select a larger number of parameters by finely dividing the threshold value. Further, instead of the depression amount of the accelerator sensor, it is possible to select the parameter according to the rotation speed of the internal combustion engine or the output of the speed sensor. Whether or not a predetermined parameter has been set in the electronic control unit can be confirmed by, for example, the number of times a warning light (not shown) connected to the electronic control unit blinks.

[0021]

According to the electronic control unit for an automobile of the present invention, when the electronic control unit is set in the parameter setting mode, the operating state detection device mounted on the automobile for detecting the normal operating state of the automobile is detected. By using the means, it is possible to selectively set the parameters used for controlling / monitoring the vehicle in the normal driving state, so that the configuration of the electronic control device can be simplified.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of an electronic control device.

FIG. 2 is a flowchart of a main routine.

FIG. 3 is a flowchart of a first parameter setting routine.

FIG. 4 is a flowchart of a second parameter setting routine.

[Explanation of symbols]

 11 ... Turn signal switch 12 ... Accelerator sensor 13 ... Electronic control device 14 ... Mode changeover switch

Claims (1)

[Claims] 1. A driving state detection means for detecting a normal driving state of a vehicle, a storage means for storing a plurality of sets of parameters, and an operation mode of a vehicle electronic control unit, a normal driving mode and a parameter setting mode. And a mode switching means for switching between the plurality of sets of parameters stored in the storage means according to the state detected by the operating state detection means when the parameter setting mode is set by the mode switching means. Parameter setting means for selecting and setting one set of parameters from the above, and a state detected by the operating state detecting means and 1 set by the parameter setting means when the normal operation mode is set by the mode switching means. Carry out control / monitoring during normal operation of a vehicle based on a set of parameters, and Control and monitoring data normal operation control monitoring means and, automobile electronic control device including a for initialization.