Communications: electrical – Land vehicle alarms or indicators – Of burglary or unauthorized use
Patent
1995-02-28
1996-09-24
Crosland, Donnie L.
Communications: electrical
Land vehicle alarms or indicators
Of burglary or unauthorized use
340430, 3404255, 340527, 340528, 340441, 307 102, B60R 2510
Patent
active
055594913
ABSTRACT:
A motorized vehicle anti-theft system which is passive by being automatically armed (i.e., does not require a vehicle occupant to set the system). Once power has been turned on to the vehicle, detection of an attempt to start the vehicle motor or the opening of a vehicle door starts a predetermined time cycle. If a first reset signal is not received before the end of the time cycle, a vehicle disabling circuit is set. After that, a detection of actuation of the vehicle brake will trigger the disabling circuit to only permit the vehicle engine to operate properly near the engine idling speed, and set off an alarm. More specifically, the engine's operating speed is continually monitored, and after the disabling circuit is triggered, if the contemporaneous engine operating speed exceeds the normal idling speed, the vehicle fuel supply is intermittently interrupted to cause violent lunging of the vehicle. Only proper generation of the first and a second reset signal will allow the vehicle to be operated properly again.
REFERENCES:
patent: 3978478 (1976-08-01), Schmitz
patent: 4754255 (1988-06-01), Saunders et al.
patent: 4794368 (1988-12-01), Grossheim et al.
patent: 4835518 (1989-05-01), Hwang
Crosland Donnie L.
Lyon Lyman R.
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