JPH08303287A - Method for returning electronic fuel injection control device from fail safe mode and electronic fuel injection control device for vehicle - Google Patents

Abstract

PURPOSE: To prevent production of the rapid change of an unexpected running state when an electronic fuel injection control device is returned from a fail safe mode to an ordinary control mode. CONSTITUTION: An operation state of an electronic fuel injection control part 10 to produce a fuel injection signal, a part for generating an injection signal during defective operation to produce a given fuel signal, and the electronic fuel injection control part 10 are decided. An operation state deciding part is provided to effect control during normal operation so that an injection signal from the electronic fuel injection control part 10 is outputted to an injector 27, and effect control during abnormal operation so that an injection signal from the part for generating an injection signal during defective operation is outputted to an injector 27. In which case, the operation state deciding part decides that the number of engine revolutions is zero and when the number of revolutions is zero, an injection signal from the part for generating an injection signal during defective operation is changed to an injection signal from the electronic fuel injection control part 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic fuel injection control device, and more particularly to an electronic fuel injection control device in which the injection signal is fixed to a predetermined amount when it is determined that the electronic fuel injection control device is not operating normally. The present invention relates to a return method for returning to a normal state in which the injection amount is precisely controlled according to the state when the fuel injection control device comes to operate normally.

[0002]

2. Description of the Prior Art Combustion in an engine such as a gasoline engine of an automobile is precisely controlled to improve engine output and fuel consumption.
Exhaust gas is being cleaned, and in particular, an electronic fuel injection control device (hereinafter referred to as EF) is used as a device for controlling the fuel supply amount.
Called I. ) Is used. Such a control device is generally realized by computer control, and EFI is also realized by a microcomputer.

A computer may malfunction due to some cause. If the computer malfunctions, an unfavorable value is instructed as the fuel injection amount, and the operating condition of the engine may be extremely deteriorated depending on the commanded value as a result of the malfunction. In order to prevent such a situation, it has been practiced to detect whether the computer is malfunctioning and enter a fail-safe mode in which the fuel injection amount is set to a predetermined amount when the malfunction is detected. In the fail-safe mode, it is not possible to precisely control the fuel injection amount based on the detection values from various sensors that the electronic fuel injection control device normally performs, but the vehicle in which the electronic fuel injection control device is attached to the fuel injection amount cannot be controlled. It is generally designed to be able to run to some extent by setting a predetermined amount determined according to a small number of variables such as the engine speed. When the fail-safe mode is entered, a warning display such as a lamp is generally used to inform the driver of the vehicle that the EFI is abnormal and the fail-safe mode has been entered.

In the fail-safe mode, the vehicle is designed to be able to travel in a state close to a normal state, and even if the fail-safe mode is entered, the vehicle can still travel. In this way, the computer may return to a normal state while traveling in the fail-safe mode. In such a case, there are devices that continue the fail-safe mode, but a device that confirms that the computer has returned to a normal state and then returns to the normal control by the electronic fuel injection control device. There is also. The present invention relates to an electronic fuel injection control device which confirms that the computer has returned to a normal state after once entering the fail-safe mode and then returns to the normal control by the electronic fuel injection control device. .

[0005]

As described above, the fail-safe mode is designed so that the vehicle can run in a state close to a normal state, but it cannot be said to have sufficient performance for high-speed running. If the driver of the vehicle does not notice the warning indication that the fail safe mode has been entered or ignores the warning display and tries to drive at high speed, the driver tries to increase the traveling speed by forcibly stepping on the accelerator to increase the traveling speed. Things can happen. Even if such an operation is performed, a predetermined fuel injection is performed in the fail-safe mode, so that the running state is not directly affected.

However, for that reason, it is possible that the driver further steps on the accelerator to increase the speed. In such a state, when the computer returns to the normal state as described above, and the electronic fuel injection control device returns from the fail-safe mode to the normal control mode, the state in which the accelerator is strongly depressed is detected and unexpected. It is possible that sudden changes in driving conditions occur.

An object of the present invention is to prevent an unexpected sudden change in the running state from occurring when such an electronic fuel injection control device returns from the fail-safe mode to the normal control mode.

[0008]

In order to solve the above problems, the method for recovering from the fail-safe mode of the electronic fuel injection control device of the present invention is a step of detecting whether the electronic fuel injection control device is operating normally. And a step of detecting that the number of revolutions of the engine to which the fuel injection device controlled by the electronic fuel injection control device is attached is zero, and controlling the fuel injection device according to the injection signal calculated by the electronic fuel injection control device from the fail-safe mode. And a step of returning to a normal state.

Further, the electronic fuel injection control device of the present invention is
An electronic fuel injection control unit that generates a fuel injection signal according to the state of the engine, a malfunction signal injection signal generation unit that generates a predetermined fuel injection signal, and monitors whether the electronic fuel injection control unit performs a predetermined operation By doing so, it is judged whether it is operating normally, and when it is operating normally, the injection signal of the electronic fuel injection control unit is controlled to be output to the injector. In an electronic fuel injection control device including an operation state determination unit that controls the injection signal of the generation unit to be output to the injector, the operation state determination unit determines the injection signal output to the injector to be a malfunctioning injection signal generation unit. When changing from the injection signal of No. 1 to the injection signal of the electronic fuel injection control unit, the rotational speed of the engine to which the fuel injection device controlled by this electronic fuel injection control unit is attached is zero It determines, when the rotational speed is zero, and changes to the injection signal of the electronic fuel injection control unit.

As conditions for returning from the fail-safe mode, in addition to the engine speed being zero, the engine speed to which the fuel injection device controlled by the electronic fuel injection control device is attached is below a predetermined value. An engine with a fuel injection device controlled by an electronic fuel injection control device having an opening of a throttle that changes the amount of air supplied to the engine, and an engine equipped with a fuel injection device controlled by the electronic fuel injection control device The vehicle is driven by the stopped, or provided with the vehicle driven by the engine to which the fuel injection device controlled by the electronic fuel injection control device is attached, the ignition switch that the user switches the operating state of the engine, Was switched to deactivate the engine at least once after entering failsafe mode. It may be.

[0011]

In the present invention, in addition to confirming that the electronic fuel injection control section is operating normally when returning from the fail-safe mode to the normal state, the engine speed is zero or a predetermined value. The value is less than the value, the throttle opening is zero, the installed vehicle is stopped, or the vehicle ignition switch is in the inactive state at least once after entering the fail-safe mode. After confirming that it has been switched to, it is restored. If these conditions are satisfied, there is no risk of an unexpected change in the running state, such as sudden acceleration, even when returning to the normal mode, so safety can be further improved.

[0012]

1 is a diagram showing the configuration of a vehicle according to an embodiment of the present invention. In FIG. 1, reference numeral 100 is a vehicle, 101 is an engine for driving the vehicle mounted on this vehicle, an EFI engine in which electronic fuel injection control is performed, and 23 is a vehicle speed sensor for detecting the traveling speed of the vehicle. Numeral 29 is an ignition (IG) switch for the driver to switch the operating state of the EFI engine 101. As a matter of course, the vehicle 100 of the embodiment has the same equipment as an ordinary vehicle, but it is omitted here because it is not directly related to the invention.

FIG. 2 shows an EFI engine 1 according to the embodiment.
It is the figure which showed the part of 01 in more detail, and is a vehicle speed sensor 2
3 is also shown. In FIG. 2, reference numeral 10 is a control unit of the electronic fuel injection control device, which includes a CPU 11 realized by a microprocessor and a bus 12.
An input interface circuit 13, a ROM 14 for storing programs and the like, and an R for temporarily storing data and the like.
AM 15, A / D converter 16 for converting an analog signal into a digital signal, and an output interface circuit 17
And a computer including a power supply 18. The input interface circuit 13 includes a distributor 1
An output signal of a crank angle sensor for detecting a crank reference position, a rotation angle, and a cylinder position provided in 9, and a throttle opening signal output by a throttle opening sensor 20 for detecting an idle time or a high load. Degree signal, the output signal of the starter 22 for detecting the engine starting, and the output signal of the vehicle speed sensor 23 are input. Further, the output voltage of the battery 24, the output signal of the intake temperature sensor 25 that detects the intake air temperature, and the output signal of the intake pipe negative pressure sensor 26 that detects the intake pipe negative pressure are input to the A / D converter 16. It

Reference numeral 30 indicates a fail-safe control circuit of the control unit 10. An injection signal and a watchdog counter (WDC) reset signal are input from the control unit 10 to the fail-safe control circuit, and a rotation angle signal NE of the output signals of the crank angle sensor is input.
And the ignition signal I generated in the distributor 19
The GT, the throttle opening signal, and the vehicle speed signal output by the vehicle speed sensor 23 are input. Further, although not shown, the IG switch signal output from the IG switch 29 is input. The fail-safe control circuit determines whether to set the normal mode or the fail-safe mode based on these signals, and outputs an injection signal corresponding to the judgment to the injector 27. That is, the electronic fuel injection control device includes the control unit 10 and the fail-safe control circuit 30.
It is composed of

FIG. 3 is a diagram showing the configuration of the fail-safe control circuit. In FIG. 3, reference numeral 31 is a fail-safe mode injection signal generation circuit that generates an injection signal in the fail-safe mode, 32 is a fail-safe mode determination unit that determines whether to set the normal mode or the fail-safe mode, and 33 is A watchdog counter (WDC) 34 is a failsafe mode injection signal generation circuit 31, a failsafe mode determination unit 32, and a clock signal generation unit that supplies a clock signal to the WDC 33, and 35 is a failsafe mode determination unit 3
2 is a switch that selects either the injection signal from the control unit 10 or the injection signal output from the fail-safe mode injection signal generation circuit 31 according to the mode signal output from the control unit 10 and outputs the selected injection signal to the injector 27. The fail-safe mode determination unit 32 includes a rotation angle signal NE and an ignition signal I
In addition to the GT, vehicle speed signal, throttle opening signal, and IG switch signal, an overflow signal from the WDC 33 and a reset signal from the control unit 10 are input. The WDC 33 is a circuit that is widely used to detect a malfunction of a computer, and the WDC 33 counts a clock signal and measures a predetermined time, and outputs an overflow signal when the predetermined time is measured. . The computer to be monitored, in this embodiment, the computer constituting the control unit 10, periodically performs the WDC 3 within a time range shorter than the predetermined overflow time.
A reset signal for resetting 3 is generated. Therefore, if the computer forming the control unit 10 is operating normally, the WDC 33 is reset before it overflows, so that no overflow signal is output.

The injection signal generated by the fail-safe mode injection signal generating circuit in the fail-safe mode has, for example, an injection timing of 5 ° with respect to the maximum angle of the cylinder.
At the time point before CA (BTDC is 5 ° CA), the number of injections is one injection per one revolution, the injection time is 10.4 ms when the starter signal is on, and the idle time when the starter signal is off. It depends on the switch signal,
When the idle switch signal is on, it is set to 2.8 ms, and when it is off, it is set to 6.0 ms. Although not directly related to the electronic fuel injection control circuit, the ignition signal is set when BTDC is 5 ° CA and the dwell angle is set when the rotation angle signal NE is turned on.

In the present embodiment, the fail safe mode determination section 32 is composed of a computer. The determination operation in the fail-safe mode determination unit 32 will be described. In this embodiment, the determination of the normal mode or the fail-safe mode is performed by using two methods together. One is a method of using a watch dog counter (WDC) 33, and the other is a method of judging from a rotation angle signal NE and an ignition signal IGT. When the fail safe mode is entered according to one of the determination methods, the normal mode is restored when it is determined to be normal according to the same type of determination method.

FIG. 4 is a flow chart showing an operation of determining whether to enter or cancel the fail-safe mode using the WDC 33. In the present embodiment, two methods are used together, so control is performed using an interrupt signal from a computer. When the WDC 33 outputs the overflow signal, an interrupt is generated in response to the overflow signal, and it is determined in step 401 that an abnormality has occurred in the control unit 10 and the fail safe mode is set. Accordingly
The injector 27 outputs the injection signal from the fail-safe mode injection signal generation circuit 31. After entering the fail-safe mode, in step 402,
The fail safe mode is maintained until the control unit 10 detects whether the reset signal is output and outputs the reset signal.

When the control section 10 outputs the reset signal, it is further determined in step 403 whether the throttle opening is zero, and if it is zero, the normal mode is restored in step 404. The fact that the throttle opening is zero means that the accelerator is not stepped on, and even if the normal mode is restored in this state, there is no fear that the traveling state such as sudden acceleration will be greatly affected. If the throttle opening is not zero,
Return to step 402.

FIG. 5 shows the rotation angle signal NE and the ignition signal IG.
It is a flowchart in the case of judging from T. In this determination operation, for example, the ignition signal IGT is 1 between the on edge of the rotation angle signal NE and the next on edge.
Normal output is output. Therefore, it is abnormal when the ignition signal IGT is not output even once or is output a plurality of times between the on edge of the rotation angle signal NE and the next on edge, and such an abnormality occurs continuously N times. If it occurs, it shifts to fail-safe mode. N
Is set to 13 when the starter signal is on, and is set to 3 when the starter signal is off.

Once the fail safe mode is entered,
When the ignition signal IGT is output only once three times between the on edge of the rotation angle signal NE and the next on edge, it is determined that the computer forming the control unit 10 has returned to normal. , Return to normal mode again. As shown in FIG. 5, the process in this case is also performed by the interrupt process. First, as shown in the third interrupt processing, when the ignition signal IGT is received, the first
The value of the register is incremented by 1 and the interrupt processing ends.

The second interrupt process is executed assuming that the above-mentioned third interrupt process is being performed. When the rotation angle signal NE is received, the second interrupt process is activated. In step 501, it is determined whether the value of the first register is 1. If it is 1, it is normal, so in step 502, the first and second registers are cleared and the interrupt processing is ended. As a result, even if the ignition signal IGT is missed or an abnormality occurs frequently N-1 times, the abnormality up to that point is ignored. If the value in the first register is not 1,
In step 503, the value of the second register is incremented by 1.
In step 504, it is determined whether the value of the second register is N. If it is not N, the interrupt processing is terminated, and if it is N, it is determined that it is necessary to shift to the fail-safe mode, and the fail-safe mode is set in step 505.

Once the fail-safe mode is entered, the interrupt process continues until it is determined to be normal and the normal mode is restored. Of course, the third interrupt process is performed every time the ignition signal IGT is received.
In step 506, the first and second registers are cleared. In step 507, the process waits until the rotation angle signal NE is received. When receiving the rotation angle signal NE, step 5
At 08, it is determined whether the value of the first register is 1, and if it is not 1, the process returns to step 506. If 1, then step 5
The value of the second register is incremented by 1 at 10, and step 511
Then, it is determined whether the value of the second register is 3, and if it is not 3, the process returns to step 507, and if it is 3, the control unit 1
It is determined that the computers that make up 0 have returned to normal,
In step 512, it is further determined whether or not the throttle opening is zero. If it is zero, the normal mode is restored in step 513, and the interrupt processing ends. A throttle opening of zero means that the accelerator is not stepped on,
Even if the normal mode is restored in this state, there is no fear that the running state such as sudden acceleration will be greatly affected. If the throttle opening is not zero, the process returns to step 506.

In the above embodiment, an example in which the fail-safe mode judging section 32 is composed of a computer has been described, but the control is simple and can be easily realized even by using a logic circuit. FIG. 6 is a diagram showing a circuit configuration example when the fail-safe mode determination unit 32 is realized by a logic circuit. As shown in FIG. 6, this circuit includes a counter 70
1, N-ary counters 707 and 708, and latch 702
And a comparator 703, a register 704, D-type flip-flops 705, 706, 712 and 713, AND gates 709 and 710, and OR gates 711 and 714. Although detailed description is omitted, the same determination operation as that shown in FIGS. 4 and 5 is performed.

In the above embodiment, the ignition signal IGT is set between the on-edge and the next on-edge of the rotation angle signal NE.
Is normally output, but the present invention is not limited to this. It may be an appropriate positive integer, and the return to the normal mode can be made from the ON edge of the rotation angle signal NE to the next ON edge. The number of times the ignition signal IGT was normally output during the period was set to three times, but this can also be set to an appropriate value.

Further, after it is determined that the microcomputer constituting the control unit 10 has returned to the normal state, when the mode is returned to the normal mode, it is necessary to confirm that the unexpected change of the running state does not occur, and the throttle opening is performed. Although the condition is that the degree is zero, that is, the idle switch is on, the condition is not limited to this, and may be any condition that does not cause an unexpected change in the running state. For example, on condition that the engine speed is zero, on condition that the engine speed is below a predetermined value such as 700 rpm, or on condition that the vehicle speed is zero, that is, it is stopped, It is possible to make a condition that the ignition switch 29 is once turned off after shifting to the fail-safe mode. As shown in FIG. 3, the fail-safe mode determination unit 32 receives the vehicle speed signal and the IG switch signal in addition to the throttle opening signal. Further, the rotation speed of the engine is calculated by counting the rotation angle signal NE.

[0027]

According to the present invention, when the electronic fuel injection control device returns from the fail-safe mode to the normal control mode, an unexpected sudden change in the running state does not occur.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a vehicle according to an embodiment of the present invention.

FIG. 2 is a diagram showing an engine configuration of an embodiment.

FIG. 3 is a diagram showing a configuration of a fail-safe control circuit according to an embodiment.

FIG. 4 is a flowchart showing a failsafe mode determination operation by a watchdog counter in the embodiment.

FIG. 5 is a flowchart showing a fail-safe mode determination operation using an ignition signal in the embodiment.

FIG. 6 is a circuit diagram showing a fail-safe mode determination circuit in the example.

[Explanation of symbols]

 10 ... Electronic fuel injection control unit 30 ... Fail-safe control circuit

Claims (10)

[Claims] 1. A fail-safe mode of an electronic fuel injection control device, which monitors an operating state of the electronic fuel injection control device and restores a normal operation from a fail-safe mode in which a fuel injection amount transferred when an abnormality occurs is set to a predetermined amount. And a step of detecting whether or not the electronic fuel injection control device is operating normally, and a rotational speed of an engine to which the fuel injection device controlled by the electronic fuel injection control device is attached is zero. And a step of returning from the fail-safe mode to a normal state in which the fuel injection device is controlled in accordance with an injection signal calculated by the electronic fuel injection control device when the rotation speed is zero. A method of recovering from the fail-safe mode of the electronic fuel injection control device. 2. A fail-safe mode of an electronic fuel injection control device, which monitors an operating state of the electronic fuel injection control device and returns from a fail-safe mode in which a fuel injection amount transferred when an abnormality occurs to a predetermined amount to a normal operation. A method of recovering from the step of detecting whether the electronic fuel injection control device is operating normally, and the rotational speed of the engine to which the fuel injection device controlled by the electronic fuel injection control device is attached is equal to or less than a predetermined value. And a step of returning from a fail-safe mode to a normal state in which the fuel injection device is controlled according to an injection signal calculated by the electronic fuel injection control device when the rotation speed is equal to or lower than a predetermined value. A method of returning from a fail-safe mode of an electronic fuel injection control device, comprising: 3. A fail-safe mode of an electronic fuel injection control device, which monitors an operating state of the electronic fuel injection control device and returns from a fail-safe mode in which a fuel injection amount transferred when an abnormality occurs to a predetermined amount to a normal operation. And a step of detecting whether the electronic fuel injection control device is operating normally, and changing the air supply amount to the engine to which the fuel injection device controlled by the electronic fuel injection control device is attached. And a step of detecting that the throttle opening is zero, and when the throttle opening is zero, a normal state in which the fuel injection device is controlled according to an injection signal calculated by the electronic fuel injection control device from the fail-safe mode is set. And a step of returning the electronic fuel injection control device from the fail-safe mode. 4. A fail-safe mode of an electronic fuel injection control device, which monitors an operating state of the electronic fuel injection control device and restores a normal operation from a fail-safe mode in which a fuel injection amount transferred when an abnormality occurs is set to a predetermined amount. And a step of detecting whether the electronic fuel injection control device is operating normally, and stopping the vehicle driven by the engine to which the fuel injection device controlled by the electronic fuel injection control device is attached. And a step of returning from a fail-safe mode to a normal state of controlling the fuel injection device in accordance with an injection signal calculated by the electronic fuel injection control device when the vehicle is stopped. A method of returning from a fail-safe mode of an electronic fuel injection control device, comprising: 5. A fail-safe mode of an electronic fuel injection control device, which monitors an operating state of the electronic fuel injection control device and returns from a fail-safe mode in which a fuel injection amount transferred when an abnormality occurs to a predetermined amount to a normal operation. And a method of detecting whether the electronic fuel injection control device is operating normally, and a method for recovering from the electronic fuel injection control device, the method comprising: And detecting that the ignition switch for switching the operating state of the engine by the user is switched so as to make the engine inactive at least once after entering the fail-safe mode; and Once inactivated, the injection signal calculated by the electronic fuel injection control device from the failsafe mode. And returning to a normal state in which the fuel injection device is controlled according to the above item. 6. An electronic fuel injection control unit (10) for generating a fuel injection signal according to the state of the engine, a malfunction signal injection signal generation unit (31) for generating a predetermined fuel injection signal, and the electronic fuel The injection control unit (10) monitors whether or not it performs a predetermined operation to determine whether it is operating normally, and when it is operating normally, the electronic fuel injection control unit (10).
Is controlled to be output to the injector (27), and when the operation is abnormal, the injection signal of the malfunction signal injection signal generation unit (31) is controlled to be output to the injector (27). In an electronic fuel injection control device including an operation state determination unit (32), the operation state determination unit (32) outputs the injection signal output to an injector (27) to the malfunction signal injection signal generation unit (31). When changing from the injection signal of No. 1 to the injection signal of the electronic fuel injection control unit (10), it is determined whether the number of revolutions of the engine to which the fuel injection device controlled by the electronic fuel injection control device is attached is zero, An electronic fuel injection control device characterized in that when the rotational speed is zero, the injection signal of the electronic fuel injection control unit (10) is changed. 7. An electronic fuel injection control section (10) for generating a fuel injection signal according to the state of the engine, a malfunction signal injection signal generation section (31) for generating a predetermined fuel injection signal, and the electronic fuel The injection control unit (10) monitors whether or not it performs a predetermined operation to determine whether it is operating normally, and when it is operating normally, the electronic fuel injection control unit (10).
Is controlled to be output to the injector (27), and when the operation is abnormal, the injection signal of the malfunction signal injection signal generation unit (31) is controlled to be output to the injector (27). In an electronic fuel injection control device including an operation state determination unit (32), the operation state determination unit (32) outputs the injection signal output to an injector (27) to the malfunction signal injection signal generation unit (31). When changing from the injection signal of No. 1 to the injection signal of the electronic fuel injection control unit (10), it is determined whether the number of revolutions of the engine to which the fuel injection device controlled by the electronic fuel injection control device is attached is below a predetermined value. An electronic fuel injection control device, wherein when the rotational speed is equal to or lower than a predetermined value, the injection signal of the electronic fuel injection control unit (10) is changed. 8. An electronic fuel injection control section (10) for generating a fuel injection signal according to the state of the engine, a malfunction operation injection signal generation section (31) for generating a predetermined fuel injection signal, and the electronic fuel The injection control unit (10) monitors whether or not it performs a predetermined operation to determine whether it is operating normally, and when it is operating normally, the electronic fuel injection control unit (10).
Is controlled to be output to the injector (27), and when the operation is abnormal, the injection signal of the malfunction signal injection signal generation unit (31) is controlled to be output to the injector (27). In an electronic fuel injection control device including an operation state determination unit (32), the operation state determination unit (32) outputs the injection signal output to an injector (27) to the malfunction signal injection signal generation unit (31). When changing from the injection signal of No. 1 to the injection signal of the electronic fuel injection control unit (10), the opening degree of the throttle for changing the air supply amount to the engine to which the fuel injection device controlled by the electronic fuel injection control device is attached is It is determined whether or not it is zero, and when the opening of the throttle is zero, the electronic fuel injection control unit (1
The electronic fuel injection control device is characterized by changing the injection signal of 0). 9. An electronic fuel injection control section (10) for generating a fuel injection signal according to the state of the engine, a malfunction signal injection signal generation section (31) for generating a predetermined fuel injection signal, and the electronic fuel The injection control unit (10) monitors whether or not it performs a predetermined operation to determine whether it is operating normally, and when it is operating normally, the electronic fuel injection control unit (10).
Is controlled to be output to the injector (27), and when the operation is abnormal, the injection signal of the malfunction signal injection signal generation unit (31) is controlled to be output to the injector (27). In an electronic fuel injection control device including an operation state determination unit (32), the operation state determination unit (32) outputs the injection signal output to an injector (27) to the malfunction signal injection signal generation unit (31). When changing from the injection signal of 1 to the injection signal of the electronic fuel injection control unit (10), it is determined whether the vehicle driven by the engine to which the fuel injection device controlled by the electronic fuel injection control device is attached is stopped. An electronic fuel injection control device, wherein the injection signal of the electronic fuel injection control unit (10) is changed when stopped. 10. An electronic fuel injection control unit (10) for generating a fuel injection signal according to the state of the engine, a malfunction signal injection signal generation unit (31) for generating a predetermined fuel injection signal, and the electronic fuel The injection control unit (10) monitors whether or not it performs a predetermined operation to determine whether it is operating normally, and when it is operating normally, the electronic fuel injection control unit (10).
Is controlled to be output to the injector (27), and when the operation is abnormal, the injection signal of the malfunction signal injection signal generation unit (31) is controlled to be output to the injector (27). In an electronic fuel injection control device including an operation state determination unit (32), the operation state determination unit (32) outputs the injection signal output to an injector (27) to the malfunction signal injection signal generation unit (31). Is provided in a vehicle driven by an engine to which a fuel injection device controlled by the electronic fuel injection control device is attached, when the injection signal of the electronic fuel injection control unit (10) is changed to the injection signal of the electronic fuel injection control unit (10). An ignition switch for switching the operating state of the engine is set to deactivate the engine at least once after entering the fail-safe mode. Determines was Rikae, once when switched to the non-operating state, the electronic fuel injection control apparatus characterized by changing the injection signal of the electronic fuel injection control unit (10).