JP2003054367A - Device for interrupting immobilizer of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To start an engine from outside a vehicle by remote control when a remote-controlled engine starter is post-fitted on the vehicle with an immobilizer. SOLUTION: A member capable of transmitting cipher codes for the immobilizer and a key antenna 5 for receiving the cipher codes transmitted by the member are arranged on a place apart from an ignition key cylinder of the vehicle. By comparing the cipher codes received by the key antenna 5 and reference codes stored by a storage means, an immobilizer control unit determines whether starting of an engine is allowed or not on the basis of the comparison result. This device comprises a means for communicating the received codes. The cipher codes received at the immobilizer control unit by the key antenna is transferred to an antenna for receiving the cipher codes fixed on the ignition key cylinder 1 of the vehicle via a cylinder antenna arrange near the ignition key cylinder.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an immobilizer interrupt device for a vehicle, and more particularly to a vehicle immobilizer interrupt device for enabling an engine start without inserting the ignition key into an ignition key cylinder.

[0002]

2. Description of the Related Art Conventionally, there has been known a vehicle with an antitheft device (immobilizer) that prevents the engine from starting even if an incorrect ignition key is inserted into an ignition key cylinder of the vehicle and the ignition is turned on.

In such a vehicle, when an ignition key is inserted into an ignition key cylinder of the vehicle and the key is twisted to turn the ignition on, a secret code signal is sent to the immobilizer control unit, and fuel is supplied only when the secret code is correct. , If the vehicle can run.

That is, in the vehicle with the immobilizer, a transponder for transmitting a personal identification code is built in the ignition key, and when the ignition key is inserted into the ignition key cylinder of the vehicle and the ignition is turned on, the transponder turns the ignition key. The transponder receives the radio wave from the antenna provided in the cylinder, and the transponder uses this as a power to transmit the secret code to the antenna of the ignition key cylinder, and the immobilizer control unit connected to the antenna of the ignition key cylinder uses the ignition key. The personal identification code received by the antenna of the cylinder is compared with the reference code stored in the storage means to determine whether or not the transmitted personal identification code is correct.

The immobilizer control unit is connected to the engine ECU, and if the correct secret code cannot be obtained from the immobilizer control unit, the engine E
Notify the CU to prohibit fuel supply to the engine.

Thus, it is possible to prevent the engine from starting and the vehicle to run when the engine is started without using the correct ignition key.

[0007]

However, when the vehicle with an immobilizer is retrofitted with a remote control engine starter, the key is not inserted in the ignition key cylinder even if the engine is started by the remote control from outside the vehicle, and therefore the immobilizer is not installed. The engine remains running and the fuel is cut off and the engine cannot be started.

Further, in this case, a pseudo code signal of the key is given to the immobilizer control unit to judge that the key is inserted in the ignition key cylinder,
It is also possible to start the engine, but the location where the pseudo signal receiving means is wired to the computer such as the immobilizer control unit and the pseudo signal is different for each vehicle type, and the pseudo signal is checked for each vehicle type and the pseudo signal is set. Was tough.

The present invention eliminates the above-mentioned drawbacks.

[0010]

An immobilizer interrupt device for a vehicle according to the present invention includes a member, which is installed in the vehicle at a location distant from an ignition key cylinder of the vehicle, capable of transmitting a personal identification code for the immobilizer. The member has a key antenna for receiving a secret code transmitted by the member, and the secret code received by the key antenna is compared with a reference code by an immobilizer control unit provided in the vehicle, and whether the result permits the engine to start. It is characterized in that whether or not it is determined.

The immobilizer interrupt device for a vehicle according to the present invention is a member, which is installed in the vehicle at a location distant from an ignition key cylinder of the vehicle, capable of transmitting a secret code for the immobilizer, and a secret code transmitted by the member. An immobilizer control that has a key antenna that receives a code and a cylinder antenna that is placed in proximity to the ignition key cylinder and that communicates with the key antenna, and that the secret code received by the cylinder antenna is provided in the vehicle. Compared to the reference code by the unit,
It is characterized in that whether or not the engine is permitted to start is determined based on the result.

The key antenna and the cylinder antenna are connected by a communication cable.

A normally open switch is inserted in the communication cable.

The member capable of transmitting the personal identification code has a key portion that can be used in the ignition key cylinder.

It is characterized by further comprising an insertion box surrounding the member capable of transmitting the secret code and the key antenna, and means for preventing the theft of the member provided in the insertion box.

The antitheft means is a hardening agent for adhering the member in the insertion box.

The above-mentioned curing agent is characterized by being softened by a softening agent.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION In an immobilizer interruption device for a vehicle according to the present invention, as shown in FIGS. 1 and 2, a spare key is provided at a location (not shown) away from the ignition key cylinder 1 such as in the underdash of the vehicle. The insertion box 2 is installed, and the spare key 3 is placed in the key insertion box 2.
And a loop-shaped key antenna 5 for receiving a personal identification code transmitted from the transponder 4 of the spare key 3, and a loop-shaped cylinder antenna arranged in proximity to the antenna 6 provided in the ignition key cylinder 1 of the vehicle. 7 and the key antenna 5 are electrically connected by a communication cable 8, and a relay 10 for controlling a normally open switch 9 provided on the communication cable 8 is connected via a relay control cable 11 to a remote control engine starter (not shown). Connect to.

Since the secret code radio wave transmitted from the transponder 4 of the spare key 3 is generally weak,
The transponder 4 of the key 3 is preferably installed in the loop of the key antenna 5, and more preferably the axis of the loop of the cylinder antenna 7 and the axis of the loop of the antenna 6 are coaxial.

Since the vehicle immobilizer interruption device of the present invention has the above-mentioned structure, if the remote control engine starter mounted after the vehicle is remotely operated, the ignition is turned on by the remote control engine starter. At the same time, the normally open switch 9 is turned on via the relay control cable 11, and radio waves are transmitted from the antenna 6 of the ignition key cylinder 1 via the cylinder antenna 7, the communication cable 8 and the key antenna 5. Spare key 3 transponder 4
The transponder 4 transmits the secret code stored in the key 3 to the key antenna 5 by using this as power.

The secret code transmitted to the key antenna 5 is sent to the immobilizer control unit 12 via the communication cable 8, the cylinder antenna 7, and the antenna 6 of the ignition key cylinder, and the immobilizer control unit 12 causes the secret code to be transmitted. If the code is determined to be correct, fuel will be supplied to the engine and the engine will be started.

As described above, according to the present invention, the engine can be started by the remote control engine starter without inserting the ignition key into the ignition key cylinder.

In the present invention, the communication cable 8
Instead of using, the signal between the cylinder antenna 7 and the key antenna 5 may be wirelessly exchanged.

Further, instead of being controlled by the remote control engine starter, a dedicated remote control device for controlling the normally open switch 9 may be separately provided.

Further, in order to prevent the spare key 3 in the key insertion box 2 in the vehicle from being pulled out and the engine being started using the key, the key to be inserted in the key insertion box 2 should be a key. The above key may be processed so that it cannot be used in the ignition key cylinder, such as by deleting the cylinder insertion portion.

Further, as shown in FIG. 3, a hardener 13 such as resin is put into the key insertion box from above the spare key,
The spare key may not be easily removed in a short time.

The curing agent 13 is preferably one that can be easily softened by using a softening agent.

Further, if the key insertion box 2 is forcibly opened or broken, or if the spare key is forcibly removed from the key insertion box, some security is provided to prevent the engine from starting. The system may be installed.

In another embodiment of the present invention, as shown in FIG. 4, instead of providing a loop-shaped cylinder antenna 7, the key antenna 5 is electrically connected to the immobilizer control unit 12 by a communication cable 8. Excuse me.

According to this embodiment, the same operation as that of the previous embodiment can be performed.

[0031]

As described above, according to the immobilizer interruption device for a vehicle of the present invention, even in a vehicle equipped with an immobilizer, even if a remote control engine starter is additionally installed
While utilizing the function of the immobilizer, the engine of the vehicle can be easily started from outside the vehicle with a remote control.

Further, the engine is started only when the remote control engine starter is operated or the genuine key is inserted into the key cylinder to start the engine, and the function as an immobilizer can be activated during parking.

Further, no complicated wiring is required for each vehicle type, and no pseudo signal is required.

Further, since the normally open switch is provided, even if a minus driver or the like is inserted into the ignition key cylinder to forcibly start the engine, the immobilizer control unit determines that the key is not inserted and starts the engine. There is no such thing.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an immobilizer interrupt device for a vehicle according to the present invention.

2 is an explanatory circuit diagram of an immobilizer interrupt device for the vehicle shown in FIG.

FIG. 3 is a diagram illustrating another embodiment of a part of the immobilizer interrupt device for a vehicle according to the present invention.

FIG. 4 is a circuit diagram for explaining another embodiment of the vehicle immobilizer interruption device of the present invention.

[Explanation of symbols]

1 Ignition key cylinder 2 spare key insertion box 3 spare key 4 Transponder 5 key antenna 6 antenna 7 cylinder antenna 8 communication cable 9 Normally open switch 10 relays 11 Relay control cable 12 Immobilizer control unit 13 Curing agent

Claims (8)

[Claims] 1. A member, which is installed in the vehicle at a location distant from an ignition key cylinder of the vehicle and is capable of transmitting a personal identification code for an immobilizer, and a key antenna for receiving the personal identification code transmitted by the member. Then, the secret code received by the key antenna is compared with the reference code by the immobilizer control unit provided in the vehicle,
An immobilizer interruption device for a vehicle, wherein whether or not to permit engine start is determined based on the result. 2. A member capable of transmitting a personal identification code for an immobilizer and a key antenna for receiving the personal identification code transmitted by the member, the member being installed in the vehicle at a location distant from an ignition key cylinder of the vehicle, and the ignition. A key code received by the cylinder antenna is compared with a reference code by an immobilizer control unit provided on the vehicle, the code code having a cylinder antenna in communication with the key antenna, the code code being located close to the key cylinder. An immobilizer interrupt device for a vehicle, characterized in that it is determined by the engine whether or not to permit starting of the engine. 3. The immobilizer interrupt device for a vehicle according to claim 2, wherein the key antenna and the cylinder antenna are connected by a communication cable. 4. The immobilizer interrupt device for a vehicle according to claim 3, wherein a normally open switch is inserted in the communication cable. 5. The immobilizer interruption device for a vehicle according to claim 1, wherein the member capable of transmitting the secret code has a key portion usable for the ignition key cylinder. 6. The insertion box surrounding the member capable of transmitting the personal identification code and the key antenna, and the theft prevention means for the member provided in the insertion box. The immobilizer interruption device for a vehicle according to 3, 4, or 5. 7. The immobilizer interruption device for a vehicle according to claim 6, wherein the antitheft means is a curing agent that adheres the member in the insertion box. 8. The immobilizer interruption device for a vehicle according to claim 7, wherein the curing agent is softened by a softening agent.