Motor vehicle heated seat control

Details Motor vehicle heated seat control Motor vehicle heated seat control

1990-03-02

1993-07-20

Paschal, Mark H.

Electric heating

Heating devices

Combined with diverse-type art device

219497, 219505, 219481, H05B 102, H05B 100

Patent

active

052295796

ABSTRACT:
A control for a resistive heating element embedded within a motor vehicle seat is disclosed. In one embodiment, a transistor is biased into conduction to energize the heating element when the temperature of the element is below a threshold that is adjusted by the vehicle operator. A fault sensing system monitors operation of the control unit and de-energizes the heating element if a fault is sensed. Sensed faults include both short circuits and undesirable open circuits. Power application to the resistive heating unit can be either pulsed or continuous. In one embodiment, once a fault is detected, the heating system cannot be re-energized until the vehicle ignition switch is turned off and then returned to its on position.

REFERENCES:
patent: 2698893 (1955-01-01), Ballard
patent: 3842243 (1974-10-01), Gregory
patent: 4546238 (1985-10-01), Ahs
patent: 4554439 (1985-11-01), Gross et al.
patent: 4581522 (1986-04-01), Graham
patent: 4590359 (1986-05-01), Mobius
patent: 4607153 (1986-08-01), Ang
patent: 4700046 (1987-10-01), Fristedt
patent: 4793343 (1988-12-01), Cummings, Jr. et al.
patent: 4831483 (1989-05-01), Matsumura et al.
patent: 4926025 (1990-05-01), Wilhelm

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