JP2007038835A - Crime preventing device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a crime preventing device for a vehicle, simple in constitution, with its crime preventing effect improved. <P>SOLUTION: This crime preventing device for a vehicle is provided with a vehicle side communication part 61 provided on the vehicle for carrying out communication with a portable machine K, a parking brake 10 to brake wheels of the vehicle, an actuator 20 to switch between a brake state and a release state of the parking brake 10, and control parts 40 and 60 to collate portable machine side discrimination information held by the portable machine K with vehicle side discrimination information held on the vehicle side, and switch between a travel permitting mode to permit transfer from the brake state of the parking brake to the release state and a travel prohibiting mode to maintain the brake state of the parking brake based on the result of collation. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a crime prevention device that is provided in a vehicle such as an automobile and prevents theft or the like.

A crime prevention device that prevents theft of automobiles, etc., communicates between a key carried by a driver and the vehicle side and collates an ID code held by the key and the vehicle to permit or prohibit engine start ( (Referred to as “immobilizer”) is known (for example, see Patent Document 1).
In addition, the vehicle crime prevention device adds the working fluid of the main brake by the actuator when it is determined that the regular key is not used as a result of collating the ID code for the purpose of further improving the anti-theft property by the immobilizer. There is known one that locks the main brake by pressing (see, for example, Patent Document 2).
JP 2004-132273 A JP 2004-299562 A

However, the conventional technology that locks the main brake when a regular key is not used requires an actuator that generates fluid pressure, which complicates the configuration of the device, and can be used for parking without using a key. An effect cannot be obtained against theft of moving the vehicle as it is.
In view of the above-described problems, an object of the present invention is to provide a vehicle crime prevention device that has a simple configuration and improved crime prevention effect.

The present invention solves the above-described problems by the following means.
According to a first aspect of the present invention, a vehicle-side communication unit that is provided in a vehicle and communicates with a portable device, a parking brake that brakes the wheels of the vehicle, and an actuator that switches a braking state and a release state of the parking brake. The portable device side identification information held by the portable device and the vehicle side identification information held on the vehicle side, and based on the comparison result, the parking brake is shifted from the braking state to the released state. A vehicle security device comprising a control unit that switches between a travel permission mode for permitting the vehicle travel and a travel prohibition mode for maintaining the parking brake in the braking state.

  According to a second aspect of the present invention, in the vehicle crime prevention device according to the first aspect, the control unit permits the start of the power source for travel of the vehicle in the travel permission mode and the travel in the travel prohibition mode. It is a vehicle crime prevention device characterized by prohibiting starting of a power source for vehicles.

According to the present invention, the following effects can be obtained.
(1) Since the parking brake is maintained in the braking state when the travel prohibition mode is selected based on the collation result between the portable device side identification information and the vehicle side identification information, the parking brake driven by the actuator is Any vehicle equipped can be applied without newly adding a mechanical configuration, and the configuration of the apparatus can be simplified.
As a result, a person who does not have a legitimate portable device cannot release the parking brake, and in the case of theft in which the vehicle is moved in a parked state, the parking brake is already in a braking state. Can be prevented and a crime prevention effect can be exhibited.
(2) The crime prevention performance can be further improved by interlocking with a crime prevention device that permits or prohibits starting of the driving power source according to the collation result between the portable device side identification information and the vehicle side identification information. .

  The present invention has solved the problem of providing a vehicle crime prevention device having a simple configuration and improved crime prevention effect by prohibiting the release of the electric parking brake in accordance with the ID collation result by the immobilizer unit.

Embodiments of a vehicle security device to which the present invention is applied will be described below.
FIG. 1 is a schematic diagram showing a configuration of a vehicle security device according to the present embodiment. FIG. 2 is a block diagram showing a circuit configuration of the vehicle security device.
The vehicle security device includes a parking brake 10, an actuator unit 20, a battery 30, an electric parking brake controller 40, a vehicle side unit 50, and an immobilizer unit 60.

  The parking brake 10 is a braking device that prevents the vehicle from moving when the vehicle is parked or the like, for example, by braking the wheels of the vehicle. The parking brake 10 is provided on each of the wheel hub portions of the left and right rear wheels of the vehicle. The parking brake 10 includes a brake drum (not shown) disposed on the inner diameter side of a rotor of a disc brake used as a foot brake (main brake) and a brake shoe (not shown) that pressurizes and contacts the inner diameter side of the brake drum during braking. I have. The parking brake 10 is an electric parking brake driven by the actuator unit 20.

The actuator unit 20 drives a shoe of the parking brake 10 and makes a transition between a braking state in which the parking brake 10 generates a braking force and a released state in which the braking force is not substantially generated. The actuator unit 20 includes a parking brake cable 21 and is fixed to, for example, a floor panel portion of the vehicle.
For example, the actuator unit 20 reduces the rotational force of a direct current (DC) motor by a reduction gear train, rotates a lead screw, and pulls or relaxes the parking brake cable 21 by an equalizer screwed to the lead screw. is there.

  The parking brake cables 21 are provided corresponding to the left and right parking brakes 10, respectively, and have flexibility so as to be deformed according to a stroke of a rear suspension (not shown). The parking brake cable 21 brings the parking brake 10 into a braking state by being pulled, and releases the parking brake 10 by being relaxed.

The battery 30 is a secondary battery that is used as a main power source for a vehicle electrical system, and generates, for example, a DC 12V terminal voltage. The battery 30 includes a plus terminal 31 and a minus terminal 32.
The plus terminal 31 is connected to the electric parking brake controller 40, the vehicle-side unit 50, and the immobilizer unit 60 via wiring (harness).
The minus terminal 32 is grounded with respect to the vehicle body.

  The electric parking brake controller 40, the vehicle-side unit 50, and the immobilizer 60 are control units that can communicate with each other by a CAN communication system that is a type of in-vehicle LAN, and cooperate to control the vehicle crime prevention device.

The electric parking brake controller 40 includes an ECU 41, a relay 42, and an operation switch 43.
The ECU 41 determines whether or not the parking brake 10 needs to be braked according to inputs from the operation switch 43 and the vehicle-side unit 50, and controls the relay 42 according to the determination result.

  The relay 42 supplies driving power to the actuator unit 20 in accordance with a control signal output from the ECU 41. The relay 42 shifts the parking brake 10 from the braking state to the released state, and changes from the released state to the braking state. In order to perform this transition, the function of reversing the polarity of the driving power is provided, and the actuator unit 20 is in a neutral state in which conduction with the actuator unit 20 is interrupted except when the actuator unit 20 is driven.

  The operation switch 43 is an operation unit through which a user inputs a manual selection operation of the braking state and the release state of the parking brake 10, and includes, for example, a push button switch mounted on an instrument panel (not shown) of the vehicle. The operation switch 43 transmits the input to the ECU 41, and the ECU 41 controls the relay 42 according to this to supply driving power to the actuator unit 20 and drive the parking brake 10.

  The vehicle side unit 50 includes, for example, an engine control unit (ECU) that controls an engine of the vehicle, a transmission control unit (TCU) that controls a transmission (transmission), a VDC control unit that performs VDC control including ABS control, It has a vehicle integration unit that controls all other electrical components.

  The vehicle-side unit 50 sequentially provides the electric parking brake controller 40 with information such as the engine speed, the accelerator opening, the transmission shift position, the foot brake operation status, and the wheel rotation speed, for example. If the electric parking brake controller 40 determines that the vehicle has shifted from the running state to the stopped state based on these inputs, the electric parking brake controller 40 shifts the parking brake 10 from the released state to the braking state. On the other hand, when the electric parking brake controller 40 determines that the vehicle shifts from the stopped state to the traveling state, the electric parking brake controller 40 shifts the parking brake 10 from the braking state to the released state.

The immobilizer unit 60 collates the ID code with the key K, permits or prohibits the start of the engine of the vehicle according to the collation result, and transmits the collation result to the electric parking brake controller 40 for parking brake. The release of 10 is permitted or prohibited. The immobilizer unit 60 holds a vehicle-side ID code that is vehicle-side identification information unique to each vehicle.
Here, the key K is a portable device carried by the user, and is connected to the IC chip (not shown) that holds a key side ID code that is unique portable device side identification information for each key, and is connected to the vehicle. A communication unit (not shown) that performs communication with the communication side.
Further, the immobilizer unit 60 includes a communication unit 61 that performs communication with the key K.

Next, the operation of the vehicle security device of this embodiment will be described. FIG. 3 is a flowchart showing this operation. Hereinafter, the steps will be described step by step.
This process is started when the vehicle is parked with the parking brake 10 braked and the engine stopped.
(Step S01: Determination of presence / absence of key ID reception)
The immobilizer unit 60 determines whether or not the key-side ID code is received from the key K via the communication unit 61. If the key-side ID code is received, the process proceeds to step S02. If not received, step S01 is performed. Continue to wait repeatedly.

(Step S02: Key ID / vehicle ID verification)
The immobilizer unit 60 collates the key side ID code received from the key K with the vehicle side ID code.
(Step S03: ID match determination)
The immobilizer unit 60 proceeds to step S04 when the key-side ID code and the vehicle-side ID code match, and proceeds to step S06 when they do not match.

(Step S04: Engine start permission)
The immobilizer unit 60 outputs a start permission signal to the engine control unit of the vehicle side unit 50, and permits the start of the engine. As a result, the engine of the vehicle is in a state of accepting start by operation of a start operation unit such as a key cylinder or switch (not shown).

(Step S05: Electric parking brake release permission)
The immobilizer unit 60 outputs an electric parking brake release permission signal to the electric parking brake controller 40, permits the parking brake 10 to shift from the braking state to the released state, and ends the process. As a result, the electric parking brake controller 40 is in a state in which the parking brake 10 can be released in response to inputs from the operation switch 43 and the vehicle-side unit 50.

(Step S06: Engine start prohibited)
The immobilizer unit 60 outputs a start prohibition signal to the engine control unit of the vehicle side unit 50 to prohibit the start of the engine. As a result, the engine of the vehicle is prohibited from starting regardless of the operation of the key cylinder, the switch, and the like.

(Step S07: Electric parking brake release prohibited)
The immobilizer unit 60 outputs an electric parking brake release prohibition signal to the electric parking brake controller 40, prohibits the transition of the parking brake 10 from the braking state to the released state, and ends the process. Thereby, the electric parking brake controller 40 maintains the parking brake 10 in the braking state regardless of the input from the operation switch 43 and the vehicle-side unit 50.

As described above, according to this embodiment, when the key-side ID code and the vehicle-side ID code do not match, the parking brake 10 is prohibited from being released and the braking state is maintained. The vehicle can be applied without adding a new mechanical configuration, and the configuration of the vehicle security device can be simplified.
As a result, a person who does not have a proper key cannot release the parking brake 10, and the parking brake 10 is set in a braking state in advance even in the case of theft in which the vehicle is moved by towing or the like without using the key or the like. As a result, the vehicle can be prevented from moving and the crime prevention effect can be exhibited.
Moreover, even if the brake fluid line for the main brake is damaged or the electrical system such as the battery or the harness is damaged by preventing the vehicle from moving using the parking brake 10, the braking state is maintained. The crime prevention effect can be exhibited while maintaining the above.
Furthermore, by interlocking with an immobilizer that permits or prohibits starting of the engine according to the collation result of the key side ID code and the vehicle side ID code, the crime prevention property is further improved and necessary for such collation. By sharing a key, a communication unit, a collation device, and the like with those for an immobilizer, the configuration of the device can be further simplified.

(Modification)
The present invention is not limited to the embodiments described above, and various modifications and changes are possible, and these are also within the technical scope of the present invention.
(1) In the embodiment, the immobilizer for permitting and prohibiting the start of the engine and the electric parking brake are linked. However, the present invention is not limited to this, and collation of identification information is performed between the portable device and the vehicle side. It is good also as a structure which cooperated the other apparatus which performs this, and an electric parking brake. For example, a keyless entry device that automatically locks and unlocks the door lock mechanism based on the collation result of the identification information may be linked to an electric parking brake.
(2) In the embodiment, the engine is used as the driving power source. However, the driving power source is not limited to this, and may be another type, for example, driven by a secondary battery or a fuel cell. An electric motor, a hybrid system combining an engine and an electric motor, or the like may be used.
(3) The parking brake of the embodiment uses a drum disposed on the inner diameter side of a brake disc for a foot brake, but the parking brake may be of other types, for example, for a foot brake. These disc brakes and drum brakes and their friction materials may be shared and integrated with the parking brake.
(4) The parking brake of the embodiment uses an actuator fixed on the body side and drives the parking brake via a parking brake cable. However, the present invention is not limited to this. The present invention can also be applied to a so-called built-in type electric parking brake provided on the hub side and integrated with the parking brake.

It is the schematic which shows the structure of the Example of the vehicle crime prevention apparatus to which this invention is applied. It is a block diagram which shows the circuit structure of the vehicle crime prevention apparatus of FIG. It is a flowchart which shows operation | movement of the vehicle security device of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Parking brake 20 Actuator unit 30 Battery 40 Electric parking brake controller 50 Vehicle side unit 60 Immobilizer unit 61 Communication part

Claims (2)

A vehicle-side communication unit that is provided in the vehicle and communicates with the portable device;
A parking brake for braking the wheels of the vehicle;
An actuator for switching between a braking state and a releasing state of the parking brake;
The portable device side identification information held by the portable device is collated with the vehicle side identification information held on the vehicle side, and the transition of the parking brake from the braking state to the release state is permitted based on the comparison result. A vehicle crime prevention device comprising: a control unit that switches between a travel permission mode for performing and a travel prohibition mode for maintaining the parking brake in the braking state. The vehicle crime prevention device according to claim 1,
The vehicle security device characterized in that the control unit permits the start of the travel power source for the vehicle in the travel permission mode, and prohibits the start of the travel power source in the travel prohibit mode.

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