Integrated remote keyless entry and ignition disabling system fo

Details Integrated remote keyless entry and ignition disabling system fo Integrated remote keyless entry and ignition disabling system fo

1997-06-30

2000-03-28

Hayes, Gail O.

Communications: electrical

Continuously variable indicating

With meter reading

380262, 380273, 380274, G06F 704, H04L 900, H04K 100

Patent

active

060437529

ABSTRACT:
A remote-control unit for vehicles in which an immobilizer facility and keyless entry facility are united to enable bidirectional transmission. Further, a cost reduction is achieved by decreasing the number of parts, and labor required for maintenance is diminished. A remote-control unit for vehicles includes a circuit 16 for receiving a cryptographic code CR from a vehicle when a key 10 is fitted into a key cylinder 21, a circuit 17 for storing a cryptographic code, a control circuit for producing a first cipher system code CS1 in response to a cryptographic code, and producing a second cipher system code CS2 in response to actuation of a manual switch 12, and a transmission circuit 15 for transmitting the cipher system codes in the form of radio waves to the vehicle. The first cipher system code contains a command for permitting engine start for the vehicle, and the second cipher system code is produced on the basis of a cryptographic code in the memory circuit and contains a command for closing or opening the door lock of the vehicle.

REFERENCES:
patent: 4596985 (1986-06-01), Bongard et al.
patent: 4792783 (1988-12-01), Burgess et al.
patent: 5191610 (1993-03-01), Hill et al.
patent: 5461386 (1995-10-01), Knebelkamp
patent: 5477214 (1995-12-01), Bartel
patent: 5724028 (1998-03-01), Prokup
patent: 5841363 (1998-11-01), Jakob et al.

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