JP3226744B2 - Automotive engine control device - Google Patents

Automotive engine control device

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Publication number
JP3226744B2
JP3226744B2 JP4300795A JP4300795A JP3226744B2 JP 3226744 B2 JP3226744 B2 JP 3226744B2 JP 4300795 A JP4300795 A JP 4300795A JP 4300795 A JP4300795 A JP 4300795A JP 3226744 B2 JP3226744 B2 JP 3226744B2
Authority
JP
Japan
Prior art keywords
engine
signal
key
circuit
engine control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP4300795A
Other languages
Japanese (ja)
Other versions
JPH08239009A (en
Inventor
陽一 門田
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP4300795A priority Critical patent/JP3226744B2/en
Publication of JPH08239009A publication Critical patent/JPH08239009A/en
Application granted granted Critical
Publication of JP3226744B2 publication Critical patent/JP3226744B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/01Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens
    • B60R25/04Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the propulsion system, e.g. engine or drive motor

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine control apparatus for a vehicle having a function of making it impossible to start an engine when the vehicle is illegally driven for theft.

[0002]

2. Description of the Related Art When an automobile is stolen, it is conceivable that the engine is started and the automobile is started by directly connecting a battery and a control circuit system of the engine without using an engine starting circuit, or by using a forged key. . As a method for preventing a vehicle from such theft, there is, for example, a method disclosed in JP-A-6-227364 described below.

A computer determines whether an engine key (hereinafter referred to as a key) used for starting the engine is a legitimate key, and transmits to the engine control device information on whether the engine can be started based on the result of the determination. I do. The engine control device controls the supply of fuel to the engine and the ignition based on the availability information to start or disable the engine.

FIG. 9 is a block diagram showing a configuration of an automobile engine control device having such a theft prevention function. In the figure, reference numeral 1 denotes a DC 14 V battery mounted on a vehicle. + Terminal of battery 1 and constant voltage circuit 31,
The key switch circuit 2 is connected between 61. Key switch circuit 2 when the driver of the car starts the engine
Is turned on by a key operation, 14 V DC is supplied from the battery 1 to each of the constant voltage circuits 31 and 61 of the engine control unit 3 and the anti-theft unit 6.

The key switch circuit 2 has a built-in storage circuit for storing a unique ID code set for a key to be used. When the key is inserted into the keyhole, the ID code is read from the storage circuit and output to the anti-theft unit 6 by the receiving means 4 provided near the keyhole.

The anti-theft unit 6 converts the supplied battery voltage into a constant voltage and outputs the voltage to each circuit of the anti-theft unit 6. The ID code input from the receiving means 4 is a regular code. A CPU 62 is provided for outputting whether or not the engine start permission information to the engine control unit 3 through the communication line 5 when it is determined that the code is a legitimate code.

The engine control unit 3 has a built-in constant voltage circuit 31 for converting the supplied battery voltage into a constant voltage and outputting the voltage to each circuit of the engine control unit 3, and start permission information input through the communication line 5. A CPU 61 is built in which processes according to a control sequence program and outputs an engine start signal from an output circuit 33 to actuators mounted on various parts of the engine.

Hereinafter, the operation of the conventional apparatus will be described with reference to the block diagram of FIG. 9, the flowchart of FIG. 10, and the time chart of FIG. When the driver of the vehicle turns on the key switch circuit 2 when starting the engine, power is supplied from the battery 1 to the constant voltage circuit 31 of the engine control unit 3 and the constant voltage circuit 61 of the anti-theft unit 6. . The constant voltage circuits 31 and 61 are connected to the CPUs 32 and 6 respectively.
Power is supplied to 2 to start it.

On the other hand, the receiving means 4 receives the ID code transmitted from the key switch circuit 2 operated by a key and receives the ID code.
Transmit to PU62. The CPU 62 determines by program processing whether or not the received ID code is a regular ID code that permits engine start. If it is determined that the ID code is a legitimate ID code, start permission information is output to the CPU 32 of the engine control unit 3 via the communication line 5.

[0010] Engine control unit 3 to which the start permission information is input
CPU 32 calculates a control signal according to a control sequence program for engine start control, and outputs the control signal to an actuator mounted on each part of the engine via an output circuit 33 so that the engine can be started.

As a control process of the CPU 32 of the engine control unit 3, if it is recognized that the key switch circuit 2 is turned on by the power supply from the constant voltage circuit 31,
An initialization process for setting a predetermined set value in a related RAM (not shown) is performed (step S-1). Next, start permission information is input by performing data communication with the CPU 62 of the anti-theft unit 6, and it is determined whether or not the engine has been started with a proper ID code to determine whether the engine can be started (step S-2).

When it is determined that the start is permitted (step S-3), a normal engine control sequence is executed and a control signal is output to an actuator mounted on each part of the engine through the output circuit 33. However, the CPU 62 of the anti-theft unit 6 does not output the start permission information unless the input ID code approves the start permission. Therefore, CP
U32 makes it impossible to start the engine without processing the engine control sequence program.

The processing operation will be described with reference to the time chart of FIG. 11. When the key switch circuit 2 is first turned on, the DC voltage of 14 V is supplied to the constant voltage circuit 31 of the engine control unit 3.
And the CPU 32 is activated. The engine control unit 3 performs data communication with the anti-theft unit 3 via the communication line 5 (period t1). Thereafter, the CPU 32 determines whether to permit the start of the engine based on the start permission information (period t2).

When the start permission is determined, an engine control signal (injector drive signal) is output to the injector via the output circuit 33 (period t3). However, the period t3
When the key switch circuit 2 is turned off after the operation, the supply of the battery voltage to the engine control unit 3 and the anti-theft unit 6 is cut off, so that the operations of the CPUs 32 and 62 are reset. Therefore, when the key switch circuit 2 is turned on again and the battery voltage rises to 14 V, the engine control unit 3 performs data communication with the anti-theft unit 6 again via the communication line 5 (period t4). Then, the CPU 32 determines whether to permit the start of the engine based on the start permission information (period t).
5).

[0015]

Since the conventional engine control device having the anti-theft function is configured as described above, for example, as shown in the time chart of FIG. excessive or battery voltage because if poor contact of the battery charging line of the starter current each CPU of the anti-theft device and the engine control device in case of power failure and instantaneous power failure in the reset state.

When the battery voltage is restored, the anti-theft unit needs to calculate the start permission information again, output the start permission information to the engine control unit, and output an engine control signal based on the start permission information. Therefore, during the period t5 in which the start permission information is communicated between the anti-theft unit and the engine control unit and the start possibility determination period t6, the engine control unit stops the control signal to the engine, and thus the engine stops. there were.

Further, when the charge amount of the battery is low, each engine control unit and the anti-theft unit are reset and the engine stalls. When the engine is started again, a large amount of electric power is supplied to the control system of the engine. Therefore, it is expected that the battery charge amount is further reduced and the battery is dead.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and maintains an engine start permission information and continuously outputs an engine control signal irrespective of a temporary interruption of a battery voltage generated during engine operation. Accordingly, an object of the present invention is to obtain an engine control device for a vehicle that can prevent engine stall.

[0019]

Automotive engine control apparatus according to this invention SUMMARY OF THE INVENTION outputs the ON signal in accordance with the key operation at the time of starting the engine, a key circuit for outputting the ID code corresponding to the key, A power supply circuit operated by an ON signal output from the key circuit;
Anti-theft means for judging whether or not the key used is a legitimate key based on the D code and outputting an engine start permission signal; and operating upon receiving power supply from the power supply circuit when an ON signal is input from the key circuit. When the engine start permission signal is input , the communication with the anti-theft device is stopped and the engine is stopped.
Control means for outputting a gin control signal, preparing for input of a next engine start permission signal when an input of an off signal is determined from the key circuit, and shutting off power supply to the power supply circuit. In addition, the control means is configured to permit the engine start.
Activate the engine control system if no enable signal is input
It is impossible. The control means is provided by a key circuit.
The next time an OFF signal is input
Preparing for the communication operation of the
To refuse. Further, the control means is turned off by the key circuit.
The next time the signal is input,
Update the communication protocol as a preparation for communication operation.
This is transmitted to the anti-theft device.

[0020]

[0021]

[0022]

[0023]

[0024]

SUMMARY OF] automobile engine control device in the invention of this is, once after the engine is started, temporary battery voltage
Control means is reset due to a
Communication completion even if the program starts again
If it is recognized, the communication will not start again
Immediately execute the usual engine control processing. Therefore, d
It is possible to reduce the return time before starting the engine
Thus, the possibility of engine stall can be reduced. In addition, engine
If it is determined that the engine start is not permitted, the engine control
Turn off the fuel supply path to the engine without performing
Perform processing and processing that does not output the ignition signal to the engine
By connecting the battery and the engine control system directly
It is impossible to force the engine to start
Become. Also, the key circuit was turned off by the driver of the car
If recognized, the engine control process is stopped and the actuator
After performing the next start preparation processing such as initialization of the
After preparing for communication processing with the anti-theft unit when entering
By turning off the power at the next
Start time is reduced because the start permission judgment can be made earlier
Can be shortened. In addition, the key circuit is
When it is recognized that the
Performed the next start preparation such as initialization of the actuator
Later, with the anti-theft device after the next time the key switch is turned on
Communication methods, such as encryption generation method, communication speed, communication data
After sending information such as data format to the anti-theft device
Turning off the power at the next
Communication operation can be executed immediately and start permission judgment can be performed quickly.
The starting time can be shortened. Furthermore, communication
By changing the method, along with improving the confidentiality of the communication method,
The anti-theft function is improved.

[0025]

[0026]

[0027]

[0028]

[0029]

【Example】

Embodiment 1 FIG. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of an engine control device according to the present embodiment. In the figure, the same reference numerals as those in FIG. 9 indicate the same or corresponding parts. In the figure, reference numeral 7 denotes an engine control unit in the present embodiment. The engine control unit 7 has a constant voltage circuit 71 and an output circuit 7 having the same functions as those of a conventional engine control unit.
A CPU 72 according to the present embodiment,
And key switch ON / OF from key switch circuit 2
An OR gate 74 for inputting F information and a transistor 75 which is turned ON when an output signal of the OR gate 74 is input to the base are built in.

Reference numeral 8 denotes a power supply relay for controlling the supply of a battery voltage to each of the constant voltage circuits 61 and 71. The exciting coil 8a of the power supply relay 8 is connected between the + terminal of the battery 1 and the collector of the transistor 75. The contact 8b is connected to the + terminal of the battery 1 and the input terminals of the constant voltage circuits 61 and 71.

Next, the operation of this embodiment will be described with reference to FIG. When the driver turns on the key switch circuit 2, the key switch ON information is transmitted to the OR gate 74 of the engine control unit 7.
Is input to The OR gate 74 inputs the H signal to the base of the transistor 75 and turns on the transistor 75. When the transistor 75 is turned on, an exciting current flows from the battery 1 to the exciting coil 8a of the power supply relay 8 to turn on the relay contact 8b.
I do.

When the relay contact 8b is turned on, the battery 1
The power supply voltage is supplied to the constant voltage circuits 71 and 61 incorporated in the engine control unit 7 and the anti-theft unit 6, respectively.
After the power is supplied, the CPU 72 built in the engine control unit 7
Is operated by being supplied with a constant voltage to the key switch circuit 2.
The N information is read and the H signal is output to the OR gate 74.
After that, communication of the start permission information with the anti-theft unit 6 is performed in the same manner as in the conventional apparatus, and the engine can be started.

When the driver turns off the key switch circuit 2, the OFF information is output from an OR built in the engine control device 7.
It is input to the gate 74 and the CPU 72. After receiving the key switch OFF information, the CPU 72 executes a predetermined control and then supplies a power supply relay OF to the OR gate 74.
Output F information. As a result, the transistor 75 becomes OF
F to turn off the power supply relay 8.

As is apparent from the above description, the CPU 7
2. Once the key switch ON information is input, the power is shut off after the key switch OFF information is input. Therefore, unless key switch OFF information is input,
Even if the battery voltage is temporarily cut off, the CPU 72 continues to operate and outputs an engine control signal. Therefore, it is possible to prevent the engine from stalling due to the temporary interruption of the battery voltage.

Next, the operation of the CPU 72 in this embodiment will be described with reference to the flowchart of FIG. When the key switch circuit 2 is turned on and power is supplied to the engine control unit 7, a constant voltage is supplied from the constant voltage circuit 71 to the CPU 72, and a program incorporated in the CPU 72 starts.

As a result, similar to the conventional device, first, the related R
An initialization process for setting the AM to a predetermined initial value is performed (step S-1). Next, data communication is performed with the anti-theft unit 6, and it is determined whether or not an engine start operation has been performed with a proper key to determine whether the engine can be started (step S-2). If the start is permitted, a normal engine control sequence is executed (steps S-3 and S-4).

If the starting is not permitted, the engine cannot be started because the engine control sequence is not performed. Thereafter, if it is recognized that the key switch circuit 2 has been turned off by the driver of the vehicle (step S-5), the engine control processing is stopped and the next start preparation processing such as initialization of the actuator is performed ( step S- 6).

Thereafter, the CPU 72 outputs the key OFF information to the OR gate 74 to turn off the transistor 75 and turn off the power supply relay, thereby turning off the CPUs 71 and 6.
1 is turned off (step S-7).

Embodiment 2 FIG. Next, the operation of the CPU72 in the embodiment according to the flowchart of FIG. Key switch circuit 2 is O
N, when power is supplied to the engine control unit 7, a constant voltage is supplied to the CPU 72 by the constant voltage circuit 71,
The program built in 72 starts.

As a result, similar to the conventional device, first, the related R
An initialization process for setting the AM to a predetermined initial value is performed (step S-1). Next, data communication is performed with the anti-theft unit 6, and it is determined whether or not an engine start operation has been performed with a proper key to determine whether the engine can be started (step S-2). If the start is permitted, a normal engine control sequence is executed (steps S-3 and S-4).

In the case where starting is not permitted, the engine cannot be started by executing the processing for turning off the fuel supply path to the engine and the processing for not outputting the ignition signal to the engine without performing the engine control sequence. (Step S-8). Thereafter, if it is recognized that the key switch circuit 2 has been turned off by the driver of the vehicle (step S-5), the engine control processing is stopped and the next start preparation processing such as initialization of the actuator is performed (step S-
6) Turn off the power (step S-7).

When it is determined that the engine start is not permitted, the engine control sequence is not performed, and the process for turning off the fuel supply path to the engine and the process for not outputting the ignition signal to the engine are executed. Will not be able to start. Therefore, it is impossible to forcibly start the engine by directly connecting the battery and the engine control system.

Embodiment 3 FIG. Next, the CPU in the present embodiment
The operation of 72 will be described with reference to the flowchart of FIG.
When the key switch circuit 2 is turned on and power is supplied to the engine control unit 7, the constant voltage circuit 71
The program supplied to the CPU 72 is started.

As a result, similar to the conventional device, first, the related R
An initialization process for setting the AM to a predetermined initial value is performed (step S-1). Next, data communication is performed with the anti-theft unit 6, and it is determined whether or not an engine start operation has been performed with a proper key to determine whether the engine can be started (step S-2). If the start is permitted, a normal engine control sequence is executed (steps S-3 and S-4).

If the start is not permitted, the engine cannot be started because the engine control sequence is not performed. Thereafter, if it is recognized that the key switch circuit 2 has been turned off by the driver of the vehicle (step S-5), the engine control processing is stopped and the next start preparation processing such as initialization of the actuator is performed (step S-6). Next, when the power is turned on next time, preparations for communication processing with the anti-theft unit 6 are performed, for example, after processing such as calculation of the next communication code (step S-9), the power is turned off (step S-).
7).

The preparation for the next communication in step S-9 is made by key OF
By performing at the time of F, the processing at the time of the next power-on is reduced, the communication operation can be executed immediately, the start permission determination can be made earlier, and the start time can be shortened.

Embodiment 4 FIG. Next, the CPU in the present embodiment
The operation of 72 will be described with reference to the flowchart of FIG.
When the key switch circuit 2 is turned on and power is supplied to the engine control unit 7, the constant voltage circuit 71
The program supplied to the CPU 72 is started.

As a result, similar to the conventional device, first, the related R
An initialization process for setting the AM to a predetermined initial value is performed (step S-1). Next, it is determined whether the data communication with the anti-theft unit 6 has already been completed (step S-10). If the communication has already been completed, a normal engine control process is executed, and the completion of the communication is determined. Recognize (step S-11).

For example, the communication with the anti-theft unit 6 ends,
After the start is determined and the engine is started once, the CPU 72 is reset due to a temporary decrease in the battery voltage or the like, and if the control program is restarted, the completion of communication is recognized in step S-11. Therefore, normal engine control processing is immediately executed without performing communication with the anti-theft unit 6 again. Therefore, it is possible to shorten the return time until the operation of the engine is started.

Next, if communication with the anti-theft unit 6 has not yet been performed, data communication with the anti-theft unit 6 is performed, and it is determined whether or not the engine start operation has been performed with a proper key, and it is determined whether or not the engine can be started (step S1). S-2). If the start is permitted, a normal engine control sequence is executed to recognize the completion of communication (steps S-3 and S-11). If the start is not permitted, the engine cannot be started because the engine control sequence is not performed.

Thereafter, if it is recognized that the key switch circuit 2 has been turned off by the driver of the car (step S-5),
After stopping the engine control processing and performing the next start preparation processing such as initialization of the actuator (step S-6), after recognizing that communication with the anti-theft unit 6 is not completed (step S-1).
2) Turn off the power (step S-8). Based on the recognition information in step S-12, the necessity of the communication operation is determined in step S-10 when the power is turned on next time.

Embodiment 5 FIG. Next, the CPU in the present embodiment
The operation of 72 will be described with reference to the flowchart of FIG.
When the key switch circuit 2 is turned on and power is supplied to the engine control unit 7, the constant voltage circuit 71
The program supplied to the CPU 72 is started.

As a result, similar to the conventional device, first, the related R
An initialization process for setting the AM to a predetermined initial value is performed (step S-1). Next, data communication is performed with the anti-theft unit 6, and it is determined whether or not the vehicle has been started with a proper key to determine whether the vehicle can be started (step S-2). If the start is permitted, a normal engine control sequence is executed (steps S-3 and S-4).

Thereafter, if it is recognized that the key switch circuit 2 has been turned off by the driver of the car (step S-5),
After stopping the engine control processing and performing the next start preparation processing such as initialization of the actuator (step S-6), a communication method with the anti-theft device after the next key switch is turned on, for example, a method of generating a cipher, After transmitting information such as the communication speed and the communication data format to the anti-theft unit 6 (step S-13), the power is turned off (step S-
8).

The key O is used for the next communication preparation in step S-13.
By performing the FF, the processing at the next power-on is reduced, the communication operation can be executed immediately, the start permission determination can be made earlier, and the start time can be shortened. Further, by changing the communication method in step S-13, the confidentiality of the communication method is improved and the anti-theft function is improved.

The operation of each of the above embodiments will be described with reference to the time chart of FIG. The key switch circuit 2 is turned on (a), the battery voltage (14V) is supplied to the engine control unit 7 (b), and data communication is performed between the anti-theft unit 6 and the engine control unit 7. (Period t1) Thereafter, it is determined whether the engine can be started (Period t2), an engine control signal (injector drive signal) is output (Period t3), and when the key switch is turned off thereafter, the engine control unit 7 is activated for a predetermined period (Period t6). After the power supply to the power supply is maintained, the voltage becomes 0 V and a series of operations is completed.

During this period t6, the key switch is turned off in addition to the initialization processing of the engine actuator.
, And prepares for the next communication operation with the anti-theft unit 6. After that, when the key switch is turned on again, the same processing as the data communication with the anti-theft unit 6 (period t4) to start determination (period t5) is repeated.

FIG. 8 is a time chart for explaining the operation when the battery voltage temporarily drops for some reason during operation. The key switch is turned on (a), the battery voltage (14V) is supplied to the engine control unit 7 (b), and data communication is performed between the anti-theft unit 6 and the engine control unit 7. (Period t1) Thereafter, it is determined whether the engine can be started (period t2), and an engine control signal (injector drive signal) is output (period t3). Thereafter, the battery voltage temporarily drops (period t4), and thereafter, the battery returns to the normal voltage, and the anti-theft unit 6 and the engine control unit 7 do not recognize the key switch OFF after the CPU is reset. It is possible to output an appropriate engine control signal (period t5).

[0059]

According to this invention, according to the present invention, the control means, key times
Power supply from the power supply circuit when the ON signal is input from the
If it operates and the last time the engine start permission signal is
Stop communication with difficulty prevention device and output engine control signal
When the input signal of the OFF signal is determined from the key circuit, the next
Prepare to input the engine start permission signal and
Since the power supply was cut off, once the engine started
Is activated, the control program starts again
Even if the communication completion is recognized, the
Executes normal engine control processing immediately without communication
Return to the start of engine operation
It is possible to shorten the time and reduce the possibility of stalling
There is an effect that it can be reduced. Also, the engine start permission signal
The engine control system cannot operate if no signal is input
Therefore, if it is determined that the engine start is not permitted,
Fuel supply to the engine without performing the engine control sequence
Turn off the supply path and output the ignition signal to the engine.
By executing the power stop process, the battery and engine
Attempt to start the engine by directly connecting the control system
Is impossible and the anti-theft function is improved.
There is. Also, when the control means inputs an OFF signal from the key circuit,
The next communication operation with the anti-theft device.
Power supply circuit to shut off the power supply.
Therefore, the next time the power is turned on,
Turn off the power after preparing to
The processing when the power is turned on is reduced, and communication operations can be executed immediately.
Start-up time can be shortened because the operation permission judgment can be made earlier
There is an effect that can be achieved. Furthermore, the control means is a key
Performed between the anti-theft device and the off signal input from the circuit
Communication protocol as a preparation process for the next communication operation
Was updated and sent to the anti-theft device.
In addition to the effect of item 3, the processing at the next power-on is reduced
Communication operation can be executed immediately and start permission judgment can be made quickly.
To reduce the start-up time and the communication method
The confidentiality of the communication method by changing the
There is an effect that the prevention function is improved.

[0060]

[0061]

[0062]

[0063]

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of an automobile engine control device according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating the operation of the present embodiment.

FIG. 3 is a flowchart illustrating an operation according to a second exemplary embodiment.

FIG. 4 is a flowchart illustrating an operation of a third embodiment.

FIG. 5 is a flowchart illustrating an operation of a fourth embodiment.

FIG. 6 is a flowchart illustrating an operation of the fifth embodiment.

FIG. 7 is a time chart for explaining the operation of each embodiment.

FIG. 8 is a time chart for explaining the operation when the battery voltage temporarily drops in each embodiment.

FIG. 9 is a block diagram showing a configuration of a conventional vehicle engine control device.

FIG. 10 is a flowchart illustrating the operation of the conventional device.

FIG. 11 is a time chart for explaining the operation of the conventional device.

FIG. 12 is a time chart illustrating an operation of the conventional device when the battery voltage temporarily drops.

[Explanation of symbols]

1 battery, 2 key switch circuit, 4 receiving means,
6 Anti-theft unit, 61 constant voltage circuit, 62 CPU, 7
Engine control unit, 71 constant voltage circuit, 72 CPU, 73
Output circuit, 74 OR gate, 75 transistor, 8
Power supply relay.

Claims (4)

(57) [Claims]
1. A key circuit for outputting an ON signal in accordance with a key operation at the time of starting an engine and outputting an ID code corresponding to the key, a power circuit operated by the ON signal output from the key circuit, and anti-theft means for outputting an engine start enabling signal key used on the basis of the output ID code is determined whether regular key, before
When an ON signal is input from the key circuit, power is supplied from the power supply circuit.
Operates by receiving supply and inputs the previous engine start permission signal
If you do so, stop communication with the anti-theft device and
Control signal and determine the input of off signal from the key circuit.
Prepare to input the next engine start permission signal
A control unit for shutting off power supply to a power supply circuit .
2. The control means receives the engine start permission signal.
If not entered, disable the engine control system
The vehicle engine control device according to claim 1, wherein:
3. The power supply circuit according to claim 3, wherein the control means cuts off the power supply to the power supply circuit by performing a preparation process for the next communication operation performed with the anti-theft device when an off signal is input from the key circuit. 3. The vehicle engine control device according to 2.
4. The control means receives an off signal from a key circuit.
The next communication operation with the anti-theft device.
As a preparatory process, the communication protocol is updated to prevent theft
The vehicle engine control device according to claim 3 , wherein the transmission is performed.
JP4300795A 1995-03-02 1995-03-02 Automotive engine control device Expired - Fee Related JP3226744B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4300795A JP3226744B2 (en) 1995-03-02 1995-03-02 Automotive engine control device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP4300795A JP3226744B2 (en) 1995-03-02 1995-03-02 Automotive engine control device
DE1996106624 DE19606624C2 (en) 1995-03-02 1996-02-22 Motor control device for automobiles with anti-theft function

Publications (2)

Publication Number Publication Date
JPH08239009A JPH08239009A (en) 1996-09-17
JP3226744B2 true JP3226744B2 (en) 2001-11-05

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP4300795A Expired - Fee Related JP3226744B2 (en) 1995-03-02 1995-03-02 Automotive engine control device

Country Status (2)

Country Link
JP (1) JP3226744B2 (en)
DE (1) DE19606624C2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011225067A (en) * 2010-04-19 2011-11-10 Mitsubishi Electric Corp Antitheft device for vehicle

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3336826B2 (en) * 1995-09-29 2002-10-21 トヨタ自動車株式会社 Anti-theft device
JP3621675B2 (en) * 2001-11-06 2005-02-16 三菱電機株式会社 Anti-theft control device for automobile
JP5894879B2 (en) * 2012-07-25 2016-03-30 カルソニックカンセイ株式会社 Engine start control system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE8503257L (en) * 1985-07-01 1987-01-02 Volvo Ab electronic locking system
DE4019478C2 (en) * 1989-06-20 1993-09-16 Honda Giken Kogyo K.K., Tokio/Tokyo, Jp
JP3153032B2 (en) * 1993-02-05 2001-04-03 カルソニックカンセイ株式会社 Engine starter
US5554891A (en) * 1993-03-30 1996-09-10 Asahi Denso Kabushiki Kaisha Antitheft device for a vehicle
DE4333474C2 (en) * 1993-08-20 1995-09-21 Siemens Ag Immobilizer for a motor vehicle
DE4433449A1 (en) * 1994-09-20 1995-04-27 Oskar Wolf Holding aids for safe bathing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011225067A (en) * 2010-04-19 2011-11-10 Mitsubishi Electric Corp Antitheft device for vehicle

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JPH08239009A (en) 1996-09-17
DE19606624A1 (en) 1996-09-05
DE19606624C2 (en) 2001-10-31

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