Vehicular anti-theft system including a security control unit an

Electrical transmission or interconnection systems – Vehicle mounted systems – Automobile

Patent

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Details

180287, B60R 2504

Patent

active

056400578

ABSTRACT:
An anti-theft system is arranged so that an operation of an engine of a vehicle is maintained as it is even when a CPU of an engine control unit is reset for some reason during when the engine is operative. A CPU of a security ECU performs arithmetic operations for enabling or inhibiting injection of fuel to the engine and for enabling to start a starter on condition that a door key switch and an ignition switch are both turned on. The CPU of the engine ECU performs arithmetic operations to maintain the injection of fuel to the engine based on data of fuel injection enabling or inhibiting process stored in a B/U RAM even when it is reset after receiving the data of process for enabling or inhibiting the injection of fuel from the CPU.

REFERENCES:
patent: 4749873 (1988-06-01), Mutoh et al.
patent: 4965460 (1990-10-01), Tanaka et al.
patent: 4990906 (1991-02-01), Kell et al.
patent: 5160914 (1992-11-01), Sato
patent: 5519376 (1996-05-01), Iijima

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