JPH10138873A - Theft prevention device and method for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a robbery prevention device for a vehicle for improving the reliability of a robbery prevention function without adding a new robbery prevention mechanism. SOLUTION: A robbery prevention device is so formed that the input side of a theft prevention control unit 1 incorporating a memory means 1a for storing an preset ID code and a decision means for comparing and deciding the set ID code with an inputted ID code is connected to an ignition switch 4 and an input means 5 of the ID code, and the output side is connected to an ignition coil 7 and a display means 6, and the control unit 1 is so set as to let the display means 6 display the input requirement display of the ID code based on the closing of the ignition switch 4, decide whether the ID code inputted by the input means 5 is same as the set ID code or not according to the requirement display, when it is the same, provide an ignition signal to the ignition coil 7, and, when it is not the same, actuate and control the ignition coil 7 not to provide the ignition signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-theft device and an anti-theft method for vehicles such as a four-wheeled vehicle and a motorcycle.

[0002]

2. Description of the Related Art In general, vehicles such as four-wheeled vehicles and motorcycles are equipped with mechanical anti-theft devices such as handle locks, wire locks and U-shaped locks. Wire locks and U-shaped locks are mainly applied to motorcycles.

[0003] These antitheft devices are configured as follows. For example, when the ignition key is pulled out from the key hole, the lock member is inserted and locked in the hole of the steering shaft, preventing the rotation of the handle, and conversely, when the ignition key is inserted into the key hole, the lock member is It is configured to be pulled out of the hole.

A wire lock has locks fixed to both ends of a thick wire, and is mounted so as to surround a tire in a wheel hole of a wheel, and is configured to lock each lock. Further, the U-shaped lock utilizes a U-shaped fitting, and is basically the same as a wire lock.

[0005] These antitheft devices have features that they can be easily applied to vehicles and that they can easily prevent theft of vehicles, but have the following problems. For example, in the case of a handle lock, a lock member is easily deformed or broken by applying a large rotating force to the handle to easily release the lock, and once the lock is released, the anti-theft function is completely lost. There is a problem.

Further, the wire lock and the U-shaped lock are not pre-installed in the vehicle as in the case of the handle lock, and the owner of the vehicle must purchase and carry the wire lock and the U-shaped lock. When the lock component is made thinner for convenience in carrying, the lock is lighter and is easier to be mounted on a motorcycle, but it is more likely to be physically broken and the reliability as an antitheft device is lowered. Conversely, if the lock component is made of a thick member, it is difficult to physically break the lock, but there is a problem that the weight becomes heavy and mounting on a motorcycle becomes difficult.

[0007]

Therefore, conventionally, in order to solve such a problem, for example, an anti-theft device by inputting an ID code and an anti-theft device by transmitting and receiving radio waves have been proposed. According to these anti-theft devices, since the lock setting and release of the anti-theft mechanism are performed electrically or electronically, the reliability of the anti-theft function can be improved as compared with the mechanical anti-theft device. However, it has the following problems.

For example, in the former anti-theft device, a ten-key input unit for inputting an ID code and a lock release mechanism must be newly provided, which complicates the device configuration and increases the cost. The latter antitheft device has the same problem as the former, because a radio transmission / reception unit and an alarm device for setting and releasing the lock of the antitheft mechanism by transmitting and receiving radio waves must be newly provided.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a vehicle anti-theft device capable of improving the reliability of the anti-theft function without adding a new anti-theft mechanism.

[0010]

SUMMARY OF THE INVENTION Accordingly, in order to achieve the above-mentioned object, the present invention provides a storage means for storing a preset ID code, and a judgment for comparing the set ID code with an input ID code. Ignition switch, ID on input side of anti-theft control unit including means
The input means of the code, an ignition coil or an injector is connected to the output side, the control unit determines whether the ID code input by the input means after closing the ignition switch is the same as the set ID code, When they are the same, an ignition signal is supplied to the ignition coil or an injection signal to the injector, and when they are not the same, the operation is such that no ignition signal or injection signal is supplied to the injector.

According to a second aspect of the present invention, there is provided an anti-theft control unit including storage means for storing a preset ID code and determination means for comparing and determining the set ID code with the input ID code. The ignition unit is connected to an ignition switch and an ID code input means, and the output side is connected to an ignition coil or an injector and a display means. The control unit displays an ID code input request display on the display means based on the closing of the ignition switch. In accordance with the request display, it is determined whether the ID code input by the input means is the same as the set ID code.If the ID code is the same, the ignition signal is supplied to the ignition coil or the injection signal is supplied to the injector. Ignition signal or injector A third aspect of the present invention is characterized in that it operates so as not to supply an injection signal, a third invention is characterized in that an engine control function is added to the control unit, and a fourth invention is that an alarm means is provided on an output side of the control unit. Is connected, and when the input ID code and the set ID code are not the same, the alarm means is activated.

Further, according to a fifth aspect of the present invention, there is provided a step of inputting an ID code to the anti-theft control unit by an input means after the ignition switch is closed, and setting the input ID code to a preset ID stored in the control unit in advance. Comparing and judging whether the code is the same as the code.
A vehicle anti-theft method characterized by controlling not to supply an ignition signal to an ignition coil or an injection signal to an injector when it is determined that the code and the set ID code are not the same. After the ignition switch is closed, an ID code input request display is displayed on the display means based on a signal from the anti-theft control unit, and the ID code is input to the control unit according to the request display.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of the anti-theft device according to the present invention will be described with reference to FIGS. In the figure, reference numeral 1 denotes an anti-theft control unit, which includes at least a storage means 1a for storing a preset ID code described later and an ID code input from an input means described later and a set ID code. A judgment means for comparing and judging the identity of the two is built in. 2
Is an igniter as an engine control unit, to which signals necessary for engine control such as engine speed, gear position, countershaft speed, throttle position and the like are input, and signals necessary for engine control are output. It is configured as follows.

A battery power source 3 is connected to the input side of the control unit 1 via an ignition switch 4, and an ID code input means 5 is connected. As the input means 5, a brake switch is applied in the illustrated example. A battery power supply 3 is connected to an input side of the igniter 2 via an ignition switch 4.

On the other hand, a display means 6 and an ignition coil 7 are connected to the output side of the control unit 1. In particular, the ignition coil 7 is a logical product (AN) of the output of the control unit 1 and the output of the igniter 2.
D) is connected to the output side of the AND circuit 8 which outputs D). As the display means 6, a display unit such as a speedometer disposed on a front panel, a liquid crystal display device, or the like is applied.

In the first embodiment, an igniter is used as an engine control unit.
A fuel injection control unit may be used instead of the igniter. In that case, 7 becomes an injector, and "ignition" in the text becomes "injection".

The control unit 1 includes, for example, a central processing unit 1A, a power supply circuit 1B, a brake switch input circuit 1C, an output circuit 1D for driving a display means 6 and a drive signal. The circuit includes an ignition prohibition signal output circuit 1E, a ROM 1F, and a RAM 1G. A battery power supply 3 is connected to a power supply circuit 1B via an ignition switch 4, a brake switch 5 is connected to a brake switch input circuit 1C, and a drive signal The display means 6 is connected to the output circuit 1D, and the AND circuit 8 is connected to the ignition prohibition signal output circuit 1E. The central processing unit 1A has an internal memory or an external memory such as a ROM.
The anti-theft device is controlled according to the control program stored in 1F. Although the central processing unit 1A has a built-in storage means 1a for storing an ID code inputted by the brake switch 5, the ROM 1F is used instead.
It is also possible to store in.

Next, the operation of this device will be described with reference to FIGS.
This will be described with reference to FIG. First, the ignition switch 4
Is closed and the battery power supply 3 is connected, the control unit 1 and the igniter 2 are activated. In this state, the control unit 1 displays an ID code input request display on the display means 6 (step S1). This request display is performed, for example, by blinking the display means 6 a predetermined number of times. At this time, since the ignition prohibition signal (low signal) is output from the control unit 1 to the AND circuit 8, even if the ignition signal (high signal) is output from the igniter 2, the AND circuit 8 is output. Does not supply the ignition signal (high signal) to the ignition coil 7.

Next, the ID using the brake switch 5
A code is input (step S2). In the input receiving state of the ID code, the input by the brake switch 5 during the blinking of the display means 6 a predetermined number of times is monitored.
The input ID code is, for example, the brake switch 5
And the number of ON / OFF of the brake switch 5 or the combination with the number of blinks of the display means 6 during the ON / OFF of the brake switch 5.

Next, the central processing unit 1A of the control unit 1 compares and determines whether or not the input ID code is the same as the set ID code stored in the storage means 1a (step S3). Input ID code and setting ID
When it is determined that the codes are the same, the ignition inhibition signal output circuit 1E of the control unit 1 outputs an ignition inhibition signal release signal (high signal) (step S).
4). As a result, the AND circuit 8 is turned on, the ignition signal is supplied to the ignition coil 7, and the engine can be started properly.

On the other hand, if it is determined in step S3 that the input ID code and the set ID code are not the same,
The ignition prohibition signal from the ignition prohibition signal output circuit 1E is continued and maintained as it is, the ignition signal is not supplied from the AND circuit 8 to the ignition coil 7, and the engine cannot be started. Based on this, ID code abnormality processing is performed (step S5). As this ID code abnormality processing,
For example, a process of issuing an alarm by voice or issuing an alarm by blinking a light is performed.

According to this embodiment, at the time of sale or manufacture, a comparison is made between the set ID code previously stored in the storage means 1a of the control unit 1 and the input ID code input after the ignition switch 4 is closed. If the determination result is the same, the ignition signal is supplied to the ignition coil 7 if the determination result is the same, and the ignition signal is not supplied to the ignition coil 7 if the determination result is not the same. For this,
Even if a person other than the owner starts operating the vehicle, the engine cannot be started due to the inability to input an accurate ID code, so that theft can be reliably prevented. In particular, if the input ID code is complicated, a more excellent anti-theft effect can be obtained.

Further, since the anti-theft mechanism is mainly based on the comparing / determining means of the control unit 1, it is not physically destroyed unlike the conventional mechanical type, and the input and output of the ID code can be prevented. Since the monitor uses the existing brake switch 5 and indicators on the front panel, it is not necessary to provide a special input means and display means, and an unnecessary increase in cost can be avoided.

FIGS. 4 and 5 show a second embodiment of the present invention, which is basically the same as the above embodiment. The difference is that an igniter is integrated into the anti-theft control unit 10 as an engine control unit. The setting ID code is stored in advance in the storage unit 10a.
Is stored in This control unit 10
For example, a central processing unit 10A, a power supply circuit 10B, a brake switch input circuit 10C, a drive signal output circuit 10D for driving the display means 6, an ignition signal output circuit 10E, a ROM 10F, a RAM 10G, and an engine The power supply circuit 10B includes a battery power supply 3 via an ignition switch 4 and a brake switch input circuit 1H.
A brake switch 5 is provided at 0C, and a drive signal output circuit 1 is provided.
The display means 6 is connected to 0D, and the ignition coil 7 is connected to the ignition signal output circuit 10E.

In the second embodiment, the igniter is integrated with the anti-theft control unit as the engine control unit. However, a fuel injection control unit may be integrated instead of the igniter. In that case, 7 becomes an injector, and "ignition" in the text becomes "injection".

Next, the operation of this device will be described with reference to FIGS.
This will be described with reference to FIG. First, the ignition switch 4
Is closed and the battery power supply 3 is connected, the control unit 10 is activated. In this state, the control unit 10 displays an ID code input request display on the display means 6 (step SA1). This request display is performed, for example, by blinking the display means 6 a predetermined number of times. The engine control is not performed until the input ID code is recognized.

Next, the ID using the brake switch 5
A code is input (step SA2). In the input receiving state of the ID code, the input by the brake switch 5 during the blinking of the display means 6 a predetermined number of times is monitored.
The input ID code is, for example, the brake switch 5
And the number of ON / OFF of the brake switch 5 or the combination with the number of blinks of the display means 6 during the ON / OFF of the brake switch 5.

Next, in the central processing unit 10A of the control unit 10, the inputted ID code is stored in the storage unit 10A.
It is compared and determined whether or not it is the same as the setting ID code stored in a (step SA3). If it is determined that the input ID code and the set ID code are the same, an ignition signal (high signal) is output from the output circuit 1E of the control unit 10 (step SA4). As a result, an ignition signal is supplied to the ignition coil 7,
The engine can be started properly.

On the other hand, in step SA3, the input ID
If it is determined that the code is not the same as the set ID code, the ignition inhibition signal from the ignition signal output circuit 1E is maintained and maintained as it is, the ignition signal is not supplied to the ignition coil 7, and the engine cannot be started. Based on this, ID code abnormality processing is performed (step SA
5). As the ID code abnormality process, for example, a process of issuing a warning by voice or issuing a warning by blinking of a light is performed.

According to this embodiment, the same effects as in the above embodiment can be obtained. Particularly, in this embodiment, since the engine control unit has a function as the anti-theft control unit 10, the method of inhibiting the output of the ignition signal to the ignition coil 7 is prohibited by software. For this reason, the configuration can be further simplified. The method of prohibiting the output of the ignition signal to the ignition coil 7 may be such that the calculation of the ignition signal and the ignition prohibition signal is performed by hardware to prohibit the output of the ignition signal.

FIGS. 7 and 8 show a third embodiment of the present invention, which is basically the same as the second embodiment. The difference is that the horn 9 is connected to the anti-theft control unit 20. The setting ID code is stored in the storage unit 20a in advance. The control unit 20 includes, for example, a central processing unit 20A, a power supply circuit 20B, a brake switch input circuit 20C, and a drive signal output circuit 20D for driving the display unit 6.
An ignition signal output circuit 20E, a ROM 20F,
AM20G and input circuit 2 for signals required for engine control
0H and an output circuit 20J of a signal necessary for engine control
And a drive signal output circuit 2 for driving the horn 9
0K, a battery power supply 3 is supplied to the power supply circuit 20B via the ignition switch 4, and a brake switch 5 is supplied to the brake switch input circuit 20C.
However, the display means 6 is provided in the output circuit 20D, and the output circuit 20E
Is connected to the ignition coil 7, and the horn 9 is connected to the output circuit 20K.

Next, the operation of this device will be described with reference to FIGS.
This will be described with reference to FIG. First, the ignition switch 4
Is closed and the battery power supply 3 is connected, the control unit 20 is activated. In this state, the control unit 20 displays an ID code input request display on the display means 6 (step SB1). This request display is performed, for example, by blinking the display means 6 a predetermined number of times. The engine control is not performed until the input ID code is recognized.

Next, the ID using the brake switch 5
A code is input (step SB2). In the input receiving state of the ID code, the input by the brake switch 5 during the blinking of the display means 6 a predetermined number of times is monitored.
The input ID code is, for example, the brake switch 5
And the number of ON / OFF of the brake switch 5 or the combination with the number of blinks of the display means 6 during the ON / OFF of the brake switch 5.

Next, the central processing unit 20A of the control unit 20 stores the input ID code in the storage unit 20.
It is compared and determined whether or not it is the same as the setting ID code stored in “a” (step SB3). If it is determined that the input ID code is the same as the set ID code, an ignition signal (high signal) is output from the output circuit 20E of the control unit 20 (step SB4). As a result, the ignition signal is supplied to the ignition coil 7, and the engine can be started.

On the other hand, in step SB3, the input ID
If it is determined that the code and the set ID code are not the same, the ignition inhibition signal from the ignition signal output circuit 20E is maintained and maintained as it is, the ignition signal is not supplied to the ignition coil 7, and the engine cannot be started. Based on this, ID code abnormality processing is performed (step SB
5). This ID code abnormality processing includes the output circuit 20
By outputting a drive signal from K to the horn 9,
Horn 9 is activated to issue an alarm.

According to this embodiment, when the input ID code and the set ID code are not the same, an alarm can be issued by sounding the horn 9 mounted on the vehicle, so that the anti-theft effect is further improved. It is possible to increase.

The present invention is not limited to the above embodiment. For example, the input means of the ID code may use a direction indicator or a light in addition to the brake switch. Also, the setting ID code can be stored in an external memory of the control unit.

[0038]

As described above, according to the present invention, at the time of sale or manufacture, the setting ID code previously stored in the anti-theft control unit and the input ID code inputted after the ignition switch is closed are described. If the determination results are the same, an ignition signal or an injection signal is supplied to the ignition coil, and if they are not the same, no ignition signal is supplied to the ignition coil or no injection signal is supplied to the injector.
For this reason, even if a person other than the owner starts operating the vehicle, the engine cannot be started due to the inability to input an accurate ID code, so that theft can be reliably prevented.

In particular, if the anti-theft control unit is incorporated in the engine control unit to provide an anti-theft function, the circuit configuration can be simplified and the size of the apparatus can be reduced.

Further, since the components of the anti-theft mechanism mainly use existing brake switches, front panel indicators, horns, etc., special input means,
There is no need to provide a display means or the like, and an unnecessary increase in cost can be avoided.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram showing a first embodiment of an anti-theft device according to the present invention.

FIG. 2 is a block circuit diagram of the anti-theft control unit of FIG. 1;

FIG. 3 is a flowchart illustrating the operation of FIG. 1;

FIG. 4 is a block circuit diagram showing a second embodiment of the antitheft device according to the present invention.

FIG. 5 is a block circuit diagram of the anti-theft control unit of FIG. 4;

FIG. 6 is a flowchart illustrating the operation of FIG. 4;

FIG. 7 is a block circuit diagram showing a third embodiment of the anti-theft device according to the present invention;

FIG. 8 is a block circuit diagram of the anti-theft control unit of FIG. 7;

FIG. 9 is a flowchart illustrating the operation of FIG. 7;

[Explanation of symbols]

 1,10,20 Anti-theft control unit 1A, 10A, 20A Central processing unit 1a, 10a, 20a Storage means 2 Ignizer 3 Battery power supply 4 Ignition switch 5 Input means (brake switch) 6 Display means 7 Ignition coil 8 Logical product circuit 9 Horn

Claims (6)

[Claims] An ignition switch and an ID code input means are provided on an input side of an anti-theft control unit including a storage means for storing a preset ID code and a determination means for comparing and determining the set ID code with the input ID code. An ignition coil or an injector is connected to the output side, and the control unit determines whether or not the ID code input by the input means after the ignition switch is closed is the same as the set ID code. An anti-theft device for a vehicle, which operates so as to supply an ignition signal to a coil or an injection signal to an injector, and not supply an ignition signal to an ignition coil or an injection signal to an injector when they are not the same. 2. An ignition switch and an ID code input means on an input side of an anti-theft control unit including a storage means storing a preset ID code and a determination means for comparing and determining the set ID code with the input ID code. The output unit is connected to an ignition coil or injector and display means. The control unit causes the display means to display an input request display of an ID code based on the closing of the ignition switch. Judge whether the input ID code is the same as the set ID code.If the ID code is the same, supply the ignition signal to the ignition coil or the injection signal to the injector; otherwise, supply the ignition signal to the ignition coil or the injection signal to the injector Not to Anti-theft device for a vehicle, wherein the anti-theft device operates. 3. The vehicle anti-theft device according to claim 1, wherein the control unit is provided with an engine control function. 4. The alarm device according to claim 1, wherein an alarm device is connected to an output side of the control unit, and the alarm device is activated when the input ID code and the set ID code are not the same. Vehicle anti-theft device. 5. A step of inputting an ID code to the anti-theft control unit by an input means after closing an ignition switch, and comparing whether the input ID code is the same as a preset ID code stored in the control unit in advance. And determining if the input ID code and the set ID code are not the same in the comparing / determining step, so as not to supply an ignition signal to the ignition coil or an injection signal to the injector. To prevent vehicle theft. 6. After the ignition switch is closed, the display means displays an ID code input request display on the basis of a signal from the anti-theft control unit, and inputs the ID code to the control unit according to the request display. The method for preventing vehicle theft according to claim 5.