Electrical transmission or interconnection systems – Vehicle mounted systems – Automobile
Patent
1998-01-12
2000-10-17
Elms, Richard T.
Electrical transmission or interconnection systems
Vehicle mounted systems
Automobile
180287, B60R 2504
Patent
active
061336491
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a vehicle antitheft system and method, and in particular, to a vehicle antitheft system and method in which, if an identification code transmitted from a transponder and a registered code stored in a memory provided in the vehicle do not match, the engine cannot be started.
TECHNICAL BACKGROUND
In a conventional vehicle antitheft system, a bar code is provided in a key, and starting of the engine of the vehicle is permitted only when the bar code matches a registered code which has been stored in advance in the vehicle antitheft device (Japanese Patent Application Laid-Open No. 62-88644).
Registered codes are stored in advance in the vehicle antitheft system when the vehicle is shipped from the factory. In this vehicle antitheft system, in a case in which a key is lost or in a case in which a key is stolen or the like, it is necessary to make possible the starting of the engine of the vehicle by using a new key. In order to do so, by using a tool used exclusively for such a purpose and a pass code, the registered code which has already been registered must be erased, and an identification code corresponding to a new key must be registered. Further, in cases in which other keys are also to be used, identification codes corresponding to these new keys must be registered.
However, in the conventional vehicle antitheft system, the tool used exclusively for such a purpose is needed in order to register a new code, re-register a code, or erase a registered code. Therefore, it is either necessary to take the vehicle into the service dealer or bring the tool used exclusively for such a purpose to the location of the vehicle in order to effect erasure and registration. There is a problem in that the erasure of codes stored in advance and the re-registration of new identification codes require much trouble.
Further, there is a problem in that erasure of codes and re-registration of codes cannot be carried out if the pass number has been forgotten.
The present invention was made in order to solve the above-described problems, and an object of the present invention is to provide a vehicle antitheft system and method in which erasure of registered codes, re-registration, and the like can be carried out without using a tool used exclusively for such purposes.
DISCLOSURE OF THE INVENTION
In order to achieve the aforementioned object, a first aspect of the present invention is a vehicle antitheft system which is set so as to prevent starting of an engine when a predetermined operation is carried out, and for which setting is canceled so as to permit the starting of the engine when communication is carried out with a transponder provided in a key and transmitting an identification code and the identification code transmitted from the transponder matches a registered code which has been registered in advance, comprising: judging means for judging whether a specific key equipped with a transponder, which transmits an identification code corresponding to a registered code which has been registered in advance, is inserted in a key cylinder; mode changing means for changing a mode when a predetermined combination operation of on-and-off operations of a switching means provided in a vehicle is carried out after the specific key has been inserted in the key cylinder; and code changing means for effecting at least one of re-registration of a code and erasure of a registered code after the mode has been changed.
A second aspect of the present invention is a vehicle antitheft system which is set so as to prevent starting of an engine when a predetermined operation is carried out, and for which setting is canceled so as to permit the starting of the engine when communication is carried out with a transponder provided in a key and transmitting an identification code and the identification code transmitted from the transponder matches a registered code which has been registered in advance, comprising: canceling means for canceling the setting of the vehicle antitheft system so as
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Akatsuka Takao
Iwamoto Koji
Kamiya Masachika
Kondo Motoshi
Elms Richard T.
Toyota Jidosha & Kabushiki Kaisha
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