Electronic flasher unit for vehicle lighting system and method o

Details Electronic flasher unit for vehicle lighting system and method o Electronic flasher unit for vehicle lighting system and method o

1997-04-08

1998-09-08

Swarthout, Brent A.

Communications: electrical

Land vehicle alarms or indicators

External signal light system

340472, 340478, 340661, 340664, B60Q 1521

Patent

active

058050612

ABSTRACT:
A method and an electronic circuit are for monitoring the operation of a circuit including a plurality of intermittently powered parallel load elements, such as the flasher lamps of a vehicle. The total load current is directed through a measuring shunt resistor, and the resulting voltage across the shunt is measured and evaluated. The measured voltage initially arising across the shunt is used as a basis to establish a first voltage level for a load failure control threshold. A second voltage level greater than the first voltage level is established as a short-circuit control threshold. Then, the voltage value arising across the shunt during operation of the circuit is compared to the load failure control threshold and the short-circuit control threshold, and a load failure or a short-circuit is detected dependent upon and responsive to the result of these comparisons. If the measured voltage exceeds the first voltage threshold but not the short-circuit control threshold, then a higher voltage level is established as the load failure control threshold. The method and circuit arrangement are self-evaluating and self-adapting for different current flow conditions, and are suitable for use in a variety of load circuits, particularly a variety of different vehicle flasher light system configurations.

REFERENCES:
patent: 3825307 (1974-07-01), Carr et al.
patent: 4348655 (1982-09-01), Goertler et al.
patent: 4862142 (1989-08-01), Knight
patent: 4962350 (1990-10-01), Fukuda
patent: 5173832 (1992-12-01), Giorgetta et al.
patent: 5309142 (1994-05-01), Fritz
patent: 5331314 (1994-07-01), Koch
patent: 5493214 (1996-02-01), Good et al.
patent: 5583731 (1996-12-01), Pergent et al.
patent: 5648759 (1997-07-01), Miller et al.

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