JPH0238678A - Burglar-proof device for car - Google Patents

Abstract

PURPOSE:To suppress the burglary of cars provided with a steering rod mechanism, almost perfectly by setting an optical fiber between a light emitting means and a light receiving means, and by setting a main control section for stopping fuel jetting control or the like when required. CONSTITUTION:A fuel jet controlling device 2 for containing a light emitting section 3 consisting of a light emitting element 5 and a signal generating circuit 6, a light receiving section 4 consisting of a light receiving element 7 and a signal receiving circuit 8, and a CPU 10 for discriminating whether light signal from the light emitting section 3 coincides with light signal received by the light receiving section 4, or not, and stopping fuel jetting control or the like when required, is set. Besides, both the ends of an optical fiber 1 folded in two on the center and wound up close by a lock bar 11 are respectively confronted with the light emitting and receiving elements 5, 6, and are connected to the device 2. When the lock bar 11 is destroyed, then the optical fiber 1 is also destroyed, and signal patterns do not coincide with each other, and by the CPU 10, the fuel jetting control is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vehicle anti-theft device, and more particularly to a vehicle anti-theft device suitable for preventing theft of a vehicle having a steering lock mechanism.

[Conventional technology]

2. Description of the Related Art Passenger cars and the like are generally equipped with a steering lock mechanism that prevents theft of the vehicle even when the engine is started through so-called direct coupling.

In addition, an anti-theft device for vehicles has been developed and put into practical use, which uses sensors to detect vibrations or the opening and closing of doors, trunk rooms, and engine compartments, and if necessary, issues a warning using a buzzer or other device and simultaneously shuts off the power source. It is served to.

FIG. 4 shows a conventional example of this type. In the conventional example shown in FIG. 4, when the vibration sensor 51 detects vibration of the vehicle body,
The anti-theft device 52 detects an abnormality based on the output signal from the vibration sensor 51 and sounds the alarm buzzer 53. At the same time, the ignition switch 54 is opened and current is supplied from the battery 55 to the fuel injection controller 56. Block out the flow.

[Problem to be solved by the invention]

However, with the conventional anti-theft devices using sensors, if the installation location is known, the engine can be started by cutting off the device's power supply or short-circuiting it, and the installation location cannot be seen. In addition, it is necessary to devise measures to prevent signal lines and power lines from being cut, which has the disadvantage of limiting the installation location.

On the other hand, the lock of the steering lock mechanism has the disadvantage that it can be easily released by breaking the lock part with a hammer or the like.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide an anti-theft device for a vehicle that can improve the disadvantages of the conventional example and, in particular, can almost completely prevent theft of a vehicle equipped with a steering lock mechanism.

[Means to solve the problem]

The present invention includes a light emitting section having a light emitting means and a light receiving section having a light receiving means. An optical fiber for light transmission is arranged between the light emitting means and the light receiving means, and between the light emitting part and the light receiving part, the optical signal output from the light emitting part and the optical signal received by the light receiving part are connected. A main control section is provided that determines whether or not they match, and, if necessary, stops electronic control such as fuel injection control that is essential for starting a predetermined engine.

Furthermore, the optical fiber is installed close to the lockper, which is the main part of the steering lock mechanism. This aims to achieve the above-mentioned purpose.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described based on FIGS. 1 to 3.

The embodiment shown in FIG. 1 includes a steering shaft 21 rotatably supported below a dash panel 30 of the vehicle body;
The steering wheel 22 is provided at the upper end of the steering shaft 21. The base of the steering wheel 22 is covered with a cover 23. A lockper 11, which is a main part of the steering lock mechanism, is built into the cover 23.

The optical fiber 1, which is folded in two at the center, is wound very closely around the lock par 11. in this case,
The central bent portion IC of the optical fiber 1 is in a state in which it is substantially in contact with the locking member 11.

Both ends of the optical fiber 1 are connected to a fuel injection control unit 2.

This fuel injection control unit!・Inside of 2, a light emitting unit 3, a light receiving unit 4, and an optical signal outputted from the light emitting unit 3 and light received by the light receiving unit 4 are interposed between the light emitting unit 3 and the light receiving unit 4. A CPU (Central Information Processing Unit) 10 is installed as a main control unit that determines whether the signals match or not and stops fuel injection control etc. if necessary.

To explain this further, The light emitting section 3 includes a light emitting element 5 such as a light emitting diode.

It is constituted by a transmitting circuit 6 attached to this light emitting element. On the other hand, the light receiving section 4 includes a light receiving element 7 such as a photodiode, and a receiving circuit 8 attached to the light receiving element 7.

The optical fiber 1 has one end 1a facing the light emitting element 5,
The other end 1b is attached to the fuel injection control unit 2 with the other end facing the light receiving element 7. After the optical fiber 1 is attached to the fuel injection control unit 2, it is firmly sealed and cannot be replaced.

Next, the operation of the above embodiment will be explained based on FIG.

When the driver gets in the car, inserts the key and releases the steering lock mechanism, this device is reset and the cpuio
drives the transmitting circuit 6 (step 3101).

As a result, a signal pulse with a specific code is output from the transmitting circuit 6 to the light emitting element 5, light is output from the light emitting element 5, this light is received by the light receiving element 7 via the optical fiber 1, and a predetermined signal pulse is output by the receiving circuit 8. After signal processing is performed, the received data from the receiving circuit 8 is taken in by the CPU10 (5102
).

Next, CPU10 compares the signal pattern of the pulse signal output from the transmitting circuit 6 with the signal pattern of the received signal (SIo, 3).

If both match, the CPU 10 performs normal fuel injection control main processing, so the engine is started by the starter motor and normal fuel injection control is performed.

On the other hand, when the sending and receiving signal patterns do not match,
The CPU 10 determines that the optical fiber 1 has been destroyed and stops fuel injection control (CPU HA/LT). Therefore, the engine will not start even if the starter motor is turned.

As explained above, according to this embodiment, when attempting to break the lock bar with a hammer or the like in order to unlock the steering lock mechanism, the optical fiber is destroyed at the same time as the lock bar. signal patterns no longer match.

Therefore, the CPU 10 stops the fuel injection control, making it impossible to start the engine, and there is an advantage that theft of the vehicle can be almost completely prevented.

〔Effect of the invention〕

The present invention is configured and functions as described above, so that when the nine lock bars are broken with a hammer or the like to unlock the steering lock function, the optical fibers are simultaneously broken. For this reason, the main control section works,
Electronic control (for example, fuel injection control '4B in the above embodiment) essential for starting the engine is stopped.

Therefore, since the engine does not start even if the starter motor is turned, it is possible to provide an unprecedented and superior anti-theft device for vehicles that can almost completely prevent theft of vehicles equipped with a steering lock mechanism. .

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway configuration diagram showing the main parts of an embodiment of the present invention, FIG. 2 is an explanatory diagram showing the internal configuration of the fuel injection control unit portion of FIG. 1, and FIG. FIG. 4 is a flowchart for explaining the operation of the embodiment shown in the figure, and FIG. 4 is an explanatory diagram showing a conventional example. 1... Optical fiber, 3... Light emitting section, 4
...... Light receiving section, 5... Light emitting element as light emitting means, 7... Light receiving element as light receiving means,
10... CPU as main control unit, 11...
...Lock bar Fig. 1 Fig. 2 Fig. 5: Release yt spoon

Claims (1)

[Claims] (1), comprising a light emitting section having a light emitting means and a light receiving section having a light receiving means, an optical fiber for transmitting light is disposed between the light emitting means and the light receiving means, and the light emitting section and the light receiving section. During this period, it is determined whether the optical signal outputted from the light emitting section and the optical signal received by the light receiving section match or not, and if necessary, it is determined whether or not the optical signal outputted from the light emitting section matches the optical signal received by the light receiving section, and when necessary, it is necessary to carry out necessary functions such as fuel injection control for starting the engine. 1. An anti-theft device for a vehicle, characterized in that a main control section for stopping electronic control is provided, and the optical fiber is installed close to a lock bar that constitutes a main part of a steering lock mechanism.