Vehicle anti-theft device

Details Vehicle anti-theft device Vehicle anti-theft device

1995-06-05

1997-04-15

Hofsass, Jeffery

Communications: electrical

Land vehicle alarms or indicators

Of burglary or unauthorized use

307 105, 307 102, B60R 2510

Patent

active

056213808

ABSTRACT:
A vehicle anti-theft system in which a registration of an ID code of a new key to a vehicle side cannot easily be made by an ill-intentioned third party. Provided are a first memory for storing ID codes of operation keys and a second memory for storing an ID code of an L-key. Of a particular ID code of an inserted key has been registered as an operation key in the first memory, an immobilizer code stored in an immobllizer code memory is sent out to an engine ECU to enable the engine to be started up, and if the registered L-key is inserted, and operation keys are successively inputted, the renewal mode for the ID code is activated to rewrite the ID codes of the previously registered operation keys with ID codes of subsequently inserted operation keys in the first memory.

REFERENCES:
patent: 4291237 (1981-09-01), Kitano
patent: 4366466 (1982-12-01), Lutz
patent: 4385296 (1983-05-01), Tsubaki et al.
patent: 4858453 (1989-08-01), Namazue
patent: 4931664 (1990-06-01), Knoll
patent: 4965460 (1990-10-01), Tanaka et al.
patent: 5136284 (1992-08-01), Kitamura
patent: 5159329 (1992-10-01), Lindmayer et al.
patent: 5416471 (1995-05-01), Treharne et al.
Chubb Locks, "Opening Up a World of Key-Based Security Locking", Design Engineering, Apr. 1993, p. 23.

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