JPS63145154A - Theft preventing device for automobile - Google Patents

Abstract

PURPOSE:To certainly prevent the theft of car by installing a theft sensor for detecting the wrong getting-in operation and shutting up the brake hydraulic pressure by the feeding/exhaust valve group of a brake device on the basis of the detection signal. CONSTITUTION:When a car is used by a wrong driver, a theft sensor 14 detects the wrong use and operates. When the theft sensor 14 operates, a signal is transmitted into a shut-off control part 15, which outputs an operation instruction to operate the feeding/exhaust valve group 7 of a brake device and allow the cylinders 4 and 6 to shut up the brake hydraulic pressure. Therefore, a hold valve HV is opened, and a decay valve DV is closed, and the brake hydraulic pressure generated by a pump 17 is hut up in the wheel cylinders 4 and 6. Therefore, a brake device operates to lock wheels, and traveling is disabled, and the theft of car is certainly prevented.

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a vehicle theft prevention device, which is devised so that a braking action is performed by a brake device when an abnormal riding motion is performed. It is.

(Prior Art) As an anti-theft device to prevent a self-propelled vehicle from being driven by an unauthorized thief, for example, it detects the movement of the vehicle body caused by riding and performs an unlock operation within a certain period of time. There are known devices that sound a horn or the like when the driver does not respond.

However, the horn continues to sound even if the switch malfunctions, and in reality, such malfunctions are relatively common, making it difficult to distinguish between malfunctions and theft. Equipment is still inadequate.

(Problems to be Solved by the Invention) This invention solves the problem of conventional devices in that it is difficult to prevent theft by simply reporting using an alarm such as a horn. It is designed to make it impossible for unauthorized occupants to travel.

(Means for Solving the Problems) In order to solve the above problems, the present invention takes the following technical means.

That is, a supply/discharge valve group 7 provided to supply and discharge brake fluid pressure to and from the wheel cylinders 4.6 of the self-propelled vehicle;
a theft sensor 14 that operates when an abnormal riding operation is performed; and a containment control section that outputs a command to perform a brake fluid pressure containment operation by the supply/discharge valve group 7 based on the above-mentioned operation of the theft sensor 14. This is a vehicle anti-theft device having 15.

(Function) When an abnormal riding operation is performed, the theft sensor 7 is activated, so the containment control unit 15 causes the supply/discharge valve group 7 of the brake device to confine the brake fluid pressure to the wheel cylinders 4 and 6. Output the command.

As a result, a braking force is generated in the wheel cylinders 4 and 6 due to the containment of the brake fluid pressure, making it impossible for the self-propelled vehicle to travel, thereby reliably preventing theft by unauthorized occupants.

(Example) Next, one embodiment of the present invention will be described based on the drawings.

In the brake system for a self-propelled vehicle, the control block diagram of which is shown in FIG. 1 and the control circuit diagram shown in FIG. The brake fluid pressure is appropriately reduced and supplied to, for example, the wheel cylinder 4 of the front driving wheel 3 and the wheel cylinder 6 of the rear driven wheel 5 by the proportioning valve PV.

This braking device also includes a solenoid valve type supply/discharge valve group 7 capable of suppressing the drive torque to prevent slippage at the time of starting, and controlling the brakes to prevent wheel locking at the time of braking, a running state sensor 8, and a microcontroller. It has a driving state calculation means 10, a driving state threshold setting means 11, and a control section 12, which are configured by a computer 9.

That is, the detected values of the rotation sensors S and S2 of the driving wheels 3 and the driven wheels 5 as the running state sensor 8 are calculated by the running state calculating means 10 into running states such as rotational speed and slip rate, and the values can be set at the time of starting. Since a desirable slip rate, a desirable deceleration during braking, etc. are set as a running condition threshold by the running condition threshold setting means 11, the running condition calculated value is constant with respect to the running condition threshold. A command to control the supply/discharge valve group 7 is output from the control unit 12 so that the relationship approaches the following relationship. For example, when the wheel speed suddenly drops, by closing the hold valve Hv of the supply/discharge valve group 7 and opening the decay valve 1)v, the brake fluid pressure in the wheel cylinders 4 and 6 is discharged to the reservoir 13, and the brake fluid is braked. When the force is reduced and the wheel speed has recovered too much and it is necessary to decelerate, the decay valve DV is closed and the hold valve HV is opened to supply brake fluid pressure to the wheel cylinders 4 and 6 to reduce the wheel speed. In these intermediate states, the control section 12 performs control to close both the hold valve HV and the decay valve DV to maintain the brake fluid pressure in the wheel cylinders 4 and 6.

The self-propelled vehicle is provided with a theft sensor 14 that operates upon detecting that the self-propelled vehicle is used by an unauthorized occupant, and when the theft sensor 14 is activated, the supply/discharge valve group 7 is operated to close the wheel cylinder 4. , 6 are provided with a containment control section 15 that issues an operation command to contain the brake fluid pressure.

This containment control operation is illustrated in a flowchart in FIG.
When the anti-theft sensor 14 operates while the lock is not turned on, the pump 7'17 starts operating as a containment preparation mode (step ①).

■), when the hold valve Hv is opened and the decay valve DV is closed, and the brake fluid pressure generated by the pump 17 is confined in the wheel cylinders 4 and 6, and the driving wheels 3 and the driven wheels are driven (step ■), the containment release preparation mode is activated. When the bonder 17 stops (step), the hold valve Hv closes and the decay valve 1)v opens, the brake fluid pressure in the wheel cylinders 4 and 6 is discharged to the reservoir 13, and the wheel lock is released.

When the start switch 16 is turned on, the main control routine such as the drive torque suppression and wheel lock prevention control described above is executed.

As the theft sensor 14, for example, a pendulum type sensor that detects the movement of the self-propelled vehicle due to riding is used, and after the detection operation of this sensor, a predetermined unlocking operation (insertion of the start key or operation of the code dial) is performed within a certain period of time. ) is not performed,
In addition to validating the detection operation of the pendulum type sensor mentioned above (that is, detecting theft operation), various known sensors are used, such as a sensor that detects a start operation that does not use a starting key. can.

It may be configured to sound a horn at the same time as the wheels are locked.

(Effects of the Invention) The vehicle anti-theft device according to the present invention is configured as described above, and when an abnormal riding operation is performed, the theft sensor 14 is activated, and the containment control unit 15 is activated. controls the supply/discharge valve group 7 of the brake system so as to seal the brake fluid pressure to the wheel cylinders 4 and 6.

In this manner, in the event of theft, the brakes are applied and the wheels are locked, making it impossible for the self-propelled vehicle to travel, thereby reliably preventing theft.

Note that the supply and discharge valve group 7 used in this invention can be used as is in a self-propelled vehicle equipped with a wheel lock prevention control device as in the embodiment; Another advantage is that there is no need to newly install special equipment.

[Brief explanation of the drawing]

The figures show one embodiment of the invention, with FIG. 1 being a control block diagram, FIG. 2 being a control circuit diagram, and FIG. 3 being a flowchart. 4.6... Wheel cylinder, 7... Supply/discharge valve group, 1
4... Theft sensor, 15... Containment control unit.

Claims (1)

[Claims] A group of supply and discharge valves of a brake device provided to supply and discharge brake fluid pressure to wheel cylinders of a self-propelled vehicle;
It has a theft sensor that operates when an abnormal riding operation is performed, and a containment control section that outputs a command to perform a brake fluid pressure containment operation by a group of supply and discharge valves based on the above-mentioned operation of the theft sensor. Vehicle anti-theft device.