JPH0370649A - Antitheft device of vehicle - Google Patents

Abstract

PURPOSE:To accurately perform antitheft action of a vehicle by inhibiting its starting, when an engine is left as in operation by a driver getting off the vehicle and when the engine is started, further releasing the inhibition of starting the vehicle when cipher operation agrees with a cipher code. CONSTITUTION:Following various operations, for instance, such as on-operation of a light switch or the like in no relation to operation of starting a vehicle, cipher operation is performed by a means 1. While a condition of a driver getting off the vehicle is detected by a seat switch 2. Further a cipher signal, generated by operation of the means 1, is collated with a cipher code, previously stored in a means 4, mutually by a computer 3. When a collation result is in no agreement further when the driver is left from the vehicle, starting of the vehicle is inhibited by a means 5. While when an inhibition condition by the means 5 is released by any cause, starting of an engine, that is, its speed is detected by a sensor 6, while the means 5 is reset-actuated again to the inhibition condition.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a vehicle theft prevention device that can prevent a vehicle from being stolen even if the vehicle is left with the engine running.

[Conventional technology]

A conventional vehicle anti-theft device has an anti-theft switch inserted in series with an engine starting circuit. and,
This anti-theft switch is turned on only when a specific predetermined operation is performed. Therefore, even if a person trying to steal a car attempts to start the engine, he or she will not be able to start the engine because he or she does not know the above-mentioned specific operation. This prevents theft. Documents related to such a vehicle theft prevention device include, for example, Japanese Utility Model Application Publication No. 158742/1983 and Japanese Patent Application Laid-open No. 1983-15874.
124553, Japanese Utility Model Application Publication No. 63-42459, etc.

[Problem to be solved by the invention]

However, in the conventional technology described above, the engine must be temporarily stopped in order to prevent the vehicle from being stolen. Therefore, the cooler that had been operating until then,
Equipment that maintains a comfortable interior environment in the vehicle, such as the heater or defroster, has to stop operating, and by the time the driver returns to the vehicle, the interior environment has deteriorated. Ta. An object of the present invention is to solve the above-mentioned problems.

[Means to solve the problem]

In order to solve the above problems, the present invention applies a vehicle theft prevention device not to the engine starting system but to the drive system and braking system that exist between the engine and the wheels. In order to achieve this, the following measures have been taken: a cryptographic operation means capable of generating electrical signals; a driver alight detection means; a cryptographic code storage means; and devices other than the engine starting system. The vehicle start inhibiting means is equipped with a means for inhibiting vehicle start utilizing the engine speed sensor, an engine rotation sensor, and an anti-theft device control computer, and the means for inhibiting vehicle start is activated when the driver gets out of the vehicle with the engine running or when the engine is started; The operation of the vehicle start inhibiting means is released when the cryptographic operation signal generated by the cryptographic operation means matches the cryptographic code of the cryptographic code storage means.

[Function 1] When it is detected by the seat switch that the driver has gotten out of the vehicle, the 11 difficulty prevention device control computer sends a command to the vehicle start prohibition means, making the vehicle unable to start. However, since the vehicle start prohibition means uses a device other than the engine starting system, the engine can remain running. Therefore, +11Rt, such as a cooler, heater, defroster, etc., for maintaining a comfortable interior environment can continue to operate. When the driver returns to the driver's seat again and performs a predetermined code operation on the code operation means, the vehicle start prohibition means is placed in a state allowing the vehicle to start. However, a person who does not know the above-mentioned code operation (for example, a person who is trying to steal a car) cannot change the vehicle start prohibition means to a state where the vehicle can be started, so even if the engine is running, the person will not be able to start the vehicle. I can't do that. In addition, it is possible to temporarily stop the running engine without performing the code operation (the vehicle start prohibition means is canceled) and then start it again. As soon as the engine rotation sensor detects this, the vehicle start inhibiting means is immediately set to a state where the vehicle cannot start, so the vehicle cannot be started. Therefore, vehicle theft is prevented. [Embodiments] Hereinafter, embodiments of the present invention will be described in detail based on the drawings. (Basic Configuration and Operation of the Present Invention) FIG. 1 is a block diagram showing the configuration of the present invention. 1st
In the figure, 1 is a code operation means, 2 is a G-to-Sinch as a driver alight detection means, 3 is an anti-theft device control computer, 4 is a code code storage means, 5 is a vehicle start inhibiting means, and 6 is an engine rotation sensor. be. The code operation means I is completely unrelated to the vehicle starting operation, -
This is to generate a coded signal by performing meaningless operations. Therefore, the code operating means 1 may be of any type as long as it can be operated before the vehicle starts and can provide an electrical signal to the anti-theft device control computer 3. For example, a shift lever equipped with a switch that detects the gear shift position, various lamp switches, a wiper switch, and a brake (equipped with a brake switch) can be considered. The seat switch 2 is for detecting whether the driver has gotten out of the vehicle, and is installed on the driver's seat. The cipher code storage means 4 is for storing a predetermined cipher code. The vehicle start inhibiting means 5 is a means that can prevent the vehicle from starting even if the engine is running. Possible examples of such means include a step motor that controls the supply of fuel to the engine, a Thalassocia actuator, a transmission shift/select actuator, and a brake actuator. The anti-theft device control computer 3 is - seat switch 2
Based on the signal from the train, it is determined whether the driver got off or got on. Further, the coded signal generated by the operation of the coded operation unit 1 is compared with the coded code stored in the coded code storage unit 4, and if they do not match, a signal is sent to the vehicle start prohibition unit 5, and the vehicle is stopped. Make it not start. Since the person attempting to steal the car does not know the cryptographic operation of the cryptographic operation means l, no matching with the cryptographic code is performed. Therefore, no matter how much the user tries to start the vehicle, the vehicle start inhibiting means 5 is not enabled to start, and the vehicle cannot be started. This prevents vehicle theft. However, when the vehicle does not start, the person trying to steal the vehicle becomes suspicious, and while he is fiddling with the various controls on the driver's seat in an attempt to get the vehicle to start, he turns the key switch to temporarily stop the engine, and then stops the engine. It is expected that it will be restarted. However, when the engine is stopped by turning the key switch, the vehicle start inhibiting means 5 may be canceled. For example, when the anti-theft device control computer 3 is wired so that the power is turned off when the engine is stopped, and when the power is turned off, the vehicle start prohibition means 5 is released. be. In this case, the vehicle will be able to start when restarted, and the vehicle will be stolen. Therefore, even in the case described above, in order to prevent vehicle theft, an engine rotation sensor 6 is provided to monitor the state of the engine, and when the engine is started,
Immediately activate the vehicle start inhibiting means 5. FIG. 2 is a flowchart for explaining the present invention in detail. Item numbers ■ to ■ in the explanation of FIG. 2 correspond to stamps ■ to ■ in FIG. ■ Determine whether the driver has alighted from the vehicle based on the signal from Gyto Inch 2. (2) If the vehicle has gotten off the vehicle, a signal is sent from the anti-theft device control computer 3 to the vehicle start prohibition means 5, and the vehicle start prohibition means 5 is activated so that the vehicle cannot be started. (2) The engine rotation sensor 6 detects whether the engine has been stopped. The driver left the vehicle without stopping the engine, but it is conceivable that someone attempting to steal the vehicle got in the vehicle, became suspicious that the vehicle would not start, and operated the key switch to stop the engine. Here we detect it. ■ If the engine is stopped, detect whether it is started again. Since the vehicle cannot start unless it is started, there is no risk of it being stolen. The risk of theft is when it is started. Therefore, at that time, the process returns to step (2) and the vehicle start inhibiting means 5 is activated. Note that this step (3) is also checked when the driver starts the engine. (2) Reading the cryptographic operation signal generated by the cryptographic operation means 1; The driver of the vehicle would be able to generate the correct code operation signal since he/she knows the code operation, and anyone else would not be able to do so. (2) Check whether the read signal matches the code code stored in the code storage means 4 in advance. If they do not match, the process returns to step (2). If they match, the operation of the vehicle start inhibiting means 5 is released to enable the vehicle to start. (First Embodiment) FIG. 3 is a block diagram showing a first embodiment of the present invention. In the first embodiment, a shift lever 1-1 equipped with a shift switch (a switch that is turned on depending on the gear position) is used as the code operation means 1. The cryptographic operation using the shift lever 1-1 is, for example, N
A shift operation of one inclination such as -D5→2→R−+N can be considered. This can be determined arbitrarily. The shift switch operates in response to this operation, and the signal generated thereby becomes the cryptographic operation signal. The above-described operation of the shift lever 1-1 is a completely meaningless operation when viewed from a normal operation when starting a vehicle. Therefore, there is no way for a person trying to steal a vehicle to know about this operation. Further, in the first embodiment, as the vehicle start prohibition means 5,
A step motor 5-1 for fuel supply control, which is used for throttle control (gasoline vehicles) and injection control (diesel vehicles), is used. The step motor 5-1 can inhibit the start of the vehicle by restricting the supply of fuel to the engine. FIG. 4 is a flowchart for explaining the operation of the first embodiment. Item numbers 4-■ to 4- in the following explanation
■ corresponds to steps 4-■ to 4-■ in FIG. 4-■ Corresponds to ■ in Figure 2. 4-■ When the driver gets out of the vehicle, the steno knob motor 5-1 is forcibly held at the idle position by a signal from the anti-theft device control computer 3. The engine rotates at a low speed, and this speed is not suitable for starting. 4-■ Corresponds to ■ in Figure 2. 4-■ Corresponds to ■ in Figure 2. 4-■ Read the signal from the operation of shift lever 1-1. If the predetermined cryptographic operation is performed correctly, a cryptographic operation signal matching the cryptographic code will be generated and read. 4-■ Corresponds to ■ in Figure 2. If the read cipher operation signal does not match the cipher code, the process returns to step 4-2, so no matter how much you press the accelerator pedal, the engine speed remains at the idle speed and the vehicle cannot start. 4-■ If the read cryptographic operation signal matches the cryptographic code, the step motor 5-1, which was forcibly held in the idle position, is released from its holding. In other words, fuel is supplied in accordance with the amount of accelerator pedal depression, allowing the engine speed to increase and starting the vehicle. (Second Embodiment) FIG. 5 shows a block diagram of a second embodiment of the present invention. The difference from the first embodiment is that as a vehicle start prohibition means,
This is because the clutch control section 5-2 is used. Clutch actuator 5-2 of clutch control unit 5-2
3 is an actuator that connects or disconnects the clutch. The craft actuator 5-23 is driven by oil pressure from the oil pressure source 5-21, and the oil pressure is controlled by the electromagnetic control valve 5-22. When it is necessary to keep the vehicle in a state in which starting is prohibited, the clutch actuator 5-23 is forcibly driven to hold the clutch in the "disengaged" state. The driver sits in the driver seat and presses the shift lever 1-1.
The "disengaged" hold is released only when the code is correctly operated, and the clutch's "engagement" and "disengagement" will follow the driver's clutch operation. Only then can it take off. FIG. 6 is a flowchart for explaining the operation of the second embodiment. Since the operation can be easily understood if it corresponds to FIG. 4, detailed explanation will be omitted. (Third Embodiment) FIG. 7 is a block diagram showing a third embodiment of the present invention. The difference from the first embodiment is that a transmission control section 53 is used as means for inhibiting vehicle start. The transmission shift/select actuator 5-33 of the transmission control unit 5-3 is an actuator for shifting gear positions. The transmission shift/select actuator 5-33 is
It is driven by the oil pressure from the oil pressure source 5-3I, and the oil pressure is controlled by the electromagnetic control valve 5-32. When the driver exits the vehicle, the gear position is forcibly held in neutral. The hold is not released unless the cryptographic operation signal generated by operating the soft lever 1-1 matches the cryptographic code. If it matches the code and is released, the gear position will be shifted in accordance with the operation of the shift lever 1-1, and it will be possible to start the vehicle. FIG. 8 is a flowchart for explaining the operation of the third embodiment. Since the operation can be easily understood if it corresponds to FIG. 4, detailed explanation will be omitted. (Fourth Embodiment) FIG. 9 is a block diagram showing a fourth embodiment of the present invention. The difference from the first embodiment is that a traction control system 5-4 is used as means for inhibiting vehicle start. Some vehicles are equipped with a traction control system 5-4 related to brake control, and in such vehicles, it can be used as a vehicle start prohibition means. The Traxibon control system is a system that increases the frictional force between the wheels and the ground by adjusting the fuel supply to the engine and the braking force, and is effective when, for example, trying to escape from mud. Demonstrate. The brake actuator 5-43 is an actuator that controls the brake, and is driven by oil pressure from the oil pressure a5-41, and the oil pressure is applied to the electromagnetic control valve 5-4.
2. The electromagnetic control valve 5-42 is controlled by a signal from the anti-theft device control computer 3 via the tractor control computer 5-44. In addition, 5-45 is a front wheel speed sensor, 5-46 is a rear wheel speed sensor, 5-47 is a throttle actuator, and 5-4
8 is a step motor. When the driver exits the vehicle, the brake actuator 543 is forced into the braked state and holds it there. Then, only when the driver gets on the vehicle and correctly operates the shift lever 1-1, the hold is released and the vehicle can start. FIG. 1O is a flowchart for explaining the operation of the fourth embodiment. This operation can also be easily understood if it corresponds to FIG. 4, so a detailed explanation will be omitted. Even in vehicles that are not equipped with the traction control system 5-4, the hydraulic power source 5-41° solenoid control valve 5-
42 and a brake actuator 5-43, these can be used as vehicle start prohibition means. At that time, a signal is sent from the anti-theft device control computer 3 to the electromagnetic control valve 5-42 as shown by the dotted line. In each of the above embodiments, the shift lever 1-1 is used as the code operating means 1, and the vehicle start inhibiting means 5 is varied in various ways. However, as mentioned above, the code operating means 1 may be any device that can be operated before the vehicle starts and that emits an electrical signal. For example, the cryptographic operation is described as ``The first operation... Turning on the small lamp installed next to the Hen lamp → ○FF operation,
The second operation: the brake pedal is depressed twice (the brake pedal is turned twice from ○N to OFF), and the third operation: the wiper switch is operated from ○N to ○FF. In any case, any meaningless operation unrelated to the starting operation may be used. In this way, even if you leave your vehicle with the engine running, you will not have to worry about your vehicle being stolen.

【Effect of the invention】

According to the present invention as described above, the following effects are achieved. ■ Vehicle theft can be prevented even when the engine is running, so equipment that maintains a comfortable interior environment, such as the cooler, heater, or defroster, can continue to operate while the vehicle is away. Therefore, when you return to the vehicle, you can immerse yourself in the same comfortable interior environment as before. (2) As the code operation means and vehicle start prohibition means required in the present invention, devices already provided in the vehicle can be used, so the vehicle anti-theft device can be constructed simply and at low cost.

[Brief explanation of drawings]

Fig. 1...Block diagram showing the configuration of the present invention Fig. 2...
・Flowchart 3 for explaining the present invention in detail...Block diagram illustrating the first embodiment of the present inventionFIG. 4...Flowchart 5 for explaining the operation of the first embodiment Fig. 6: A block diagram showing the second embodiment of the present invention. Fig. 6: A flowchart explaining the operation of the second embodiment. Fig. 7: A block diagram showing the third embodiment of the present invention. FIG. 8 is a block diagram showing the operation of the third embodiment. FIG. 9 is a block diagram showing the fourth embodiment of the present invention. FIG. 4 is a flowchart for explaining the operation of the third embodiment. In the flowchart for explaining the operation of the example, 1 is the cryptographic operation means, l-1 is the shift lever.
32 is a seat switch, 3 is an anti-theft device control computer, 4 is an encryption code storage means, 5 is a vehicle start inhibiting means, 5-1 is a step motor, 5-2 is a clutch control unit,
5-21 is a hydraulic power source, 522 is an electromagnetic control valve, 5-23 is a Classochi actuator, 5-3 is a transmission control J11 section, 5-31 is a hydraulic source, 5-32 is an electromagnetic control valve, 533 is a transformer Minojoon shift/select actuator, 5-4) Luxigon control system, 5-41 hydraulic power source, 5-42 electromagnetic control valve, 5-43
is a brake actuator, 544 is a traction control computer, 5-45 is a front wheel speed sensor, 5
-46 is a rear wheel speed sensor, 5-47 is a throttle actuator, 5-48 is a step motor, and 6 is an engine rotation sensor.

Claims (1)

[Claims] A cryptographic operation means capable of generating an electrical signal, a driver alight detection means, a cryptographic code storage means, a vehicle start prohibition means using a device other than an engine starting system, an engine rotation sensor, and an anti-theft device control computer. and when the driver gets out of the vehicle with the engine running and when the engine is started, the vehicle start inhibiting means is activated, and the cryptographic operation signal generated by the cryptographic operation means reads the cryptographic code stored in the cryptographic code storage means. A vehicle theft prevention device characterized in that the vehicle start inhibiting means is deactivated when the vehicle start inhibiting means coincides with the following.