Vehicle anti-theft device with low voltage compensation and a ro

Details Vehicle anti-theft device with low voltage compensation and a ro Vehicle anti-theft device with low voltage compensation and a ro

1996-09-20

1998-08-18

Elms, Richard T.

Electrical transmission or interconnection systems

Vehicle mounted systems

Automobile

180287, B60R 2504

Patent

active

057961794

ABSTRACT:
A vehicle theft-prevention device which includes an ignition key having a transponder, a coil unit for supplying power to the transponder when the ignition key is inserted into the coil unit and then turned to a starting position thereby permitting the transponder to generate an identification code. The coil unit outputs the identification code to a disabling controller and the disabling controller outputs an engine drive signal when the identification code from the coil unit is valid and outputs an engine stop signal when the identification code is invalid. The vehicle theft prevention device also includes an engine controller for permitting an engine starting operation to continue when the engine drive signal is input into the engine controller from the disabling controller within a predetermined communication time period from a moment the engine starting operation is initiated by turning the ignition key to the start position. The disabling controller and the engine controller are each provided with respective low-voltage communication modules for communicating therebetween when a battery voltage is less than a predetermined low-voltage level after the engine starting operation is initiated.

REFERENCES:
patent: 5412379 (1995-05-01), Waraksa et al.
patent: 5519376 (1996-05-01), Iijima
patent: 5539260 (1996-07-01), Khangura et al.
patent: 5583383 (1996-12-01), Denz et al.
patent: 5600324 (1997-02-01), Reed et al.
patent: 5621381 (1997-04-01), Kawachi et al.
patent: 5631501 (1997-05-01), Kubota et al.
patent: 5635900 (1997-06-01), Hasegawa et al.

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