Automatic daytime running light system

Details Automatic daytime running light system Automatic daytime running light system

1993-12-06

1995-08-01

Pascal, Robert J.

Electric lamp and discharge devices: systems

Special application

Vehicle

315 77, 315 78, 315 80, B60Q 102

Patent

active

054382378

ABSTRACT:
An automatic daytime running light system for a vehicle having an engine, an electric power source, a starter motor circuit for the engine, external running lights including headlights and parking lights, and input switches for ignition circuit and the external running lights, the system being responsive to the input switches and starter motor circuit to automatically control the operation of the external running lights, and the system including digital logic timer circuit means for automatically controlling the operation of the external running lights, and MOSFET output switching devices, which thereby provide high reliability and safety, redundant circuitry to thereby provide a higher level of reliability and fail-safe operation of the system, and MOSFET fault current monitoring circuitry which monitors the drain to source fault currents of the MOSFET output switch means, whereby upon detection of fault currents, the digital logic timer controls a fault current indicator to provide an indication of a fault current condition.

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TMOS Power MOSFET 1992 Selector Guide and Cross Reference SG56/D REV12 Motorola, cover page, pp. 1, 2, 3 and 4.

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