Anti-theft vehicle security system having an engine control devi

Details Anti-theft vehicle security system having an engine control devi Anti-theft vehicle security system having an engine control devi

1996-05-14

1997-09-16

Elms, Richard T.

Electrical transmission or interconnection systems

Vehicle mounted systems

Automobile

180287, B60R 2504

Patent

active

056684169

ABSTRACT:
Time required to start an engine is shortened by avoiding a collision in data exchange communication between an engine control device 3 and an anti-theft security device 6. Also, an attempt is made to achieve improved security and an improved reliability of communication. The system includes: an anti-theft security device 6 for determining whether starting of the engine should be allowed or not; an engine control device 3 for controlling start permission or start prohibition of the engine based on the determination of whether the starting should be allowed or not and for computing control of the engine based on various operating conditions; and communication control means 3-2, 6-2 defining a protocol where data exchange between said anti-theft security device 6 and the engine control device 3 including the result of determination of whether starting of the engine should be allowed or not is performed by sharing a single communication line 5 and data transmission is started from either the anti-theft security device 6 or the engine control device 3, the transmitting side continuing transmitting until the receiving side sends back a result indicating recognition of the transmitted content.

REFERENCES:
patent: 4749873 (1988-06-01), Mutoh et al.
patent: 5299194 (1994-03-01), Ichii et al.
patent: 5528086 (1996-06-01), Maass et al.
patent: 5539260 (1996-07-01), Khangura et al.
patent: 5561332 (1996-10-01), Udo et al.

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