Anti-theft system for a motor vehicle

Details Anti-theft system for a motor vehicle Anti-theft system for a motor vehicle

1996-03-04

1999-03-30

Horabik, Michael

Communications: electrical

Continuously variable indicating

With meter reading

4551921, 307 102, 307 105, 340825, 340 72, H04B 118, B60R 2500, B60R 2504, G08C 1900

Patent

active

058894713

ABSTRACT:
In an anti-theft system for a motor vehicle, an oscillating circuit of a transceiver in the motor vehicle is modulated with code information of a portable transponder. A demodulator detects the code information and carries it onward to a computer unit, where it is checked for authorization. Component tolerance or temperature changes can mean that initially no code information will be demodulated, despite a properly functioning transponder. According to the invention, the frequency of the modulated oscillation is then measured and reregulated to a command frequency.

REFERENCES:
patent: 4388524 (1983-06-01), Walton
patent: 4523178 (1985-06-01), Fulhorst
patent: 4688036 (1987-08-01), Hirano et al.
patent: 5166620 (1992-11-01), Panosh
patent: 5561420 (1996-10-01), Kleefeldt et al.

Affiliated with

Also associated with

Rating

Anti-theft system for a motor vehicle does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Anti-theft system for a motor vehicle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Anti-theft system for a motor vehicle will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1218372