Communications: electrical – Land vehicle alarms or indicators – External signal light system
Patent
1999-03-11
2000-05-30
Lefkowitz, Edward
Communications: electrical
Land vehicle alarms or indicators
External signal light system
340471, 340475, 340664, B60Q 126
Patent
active
060695595
ABSTRACT:
A programmable turn signal and hazard flasher control system (10, 100) includes a lamp control module (12, 108) coupling a turn signal request unit (14, 106) to a number of turn signal lamps (20-30). The module (12, 108) couples the turn signal request unit (14, 106) to a number of vehicle turn signal lamps (20-26) in a first mode of operation and to a number of vehicle turn signal lamps (20-26) as well as a number of additional turn signal lamps (28, 30) in a second mode of operation to thereby accommodate lighting requirements of a trailer or other towed vehicle or to accommodate different lighting requirements in vehicles of a common vehicle platform. The load current to the turn signal lamps (20-30) in either case flows through a shunt resistor R1, and is controlled by a flasher circuit (54) during normal operation to a first flash rate and during a lamp failure condition to a second faster flash rate. The module (12, 108) further includes a control circuit (62) responsive to an appropriate signal state at a lamp designation control input (34) to provide a predefined load activation signal to the flasher circuit (54) regardless of whether the module (12, 108) is coupled to only a minimum number of vehicle turn signal lamps, or the minimum number of vehicle turn signal lamps as well as a number of additional turn signal lamps.
REFERENCES:
patent: 4302748 (1981-11-01), Gant
patent: 4380753 (1983-04-01), Gant
patent: 5072210 (1991-12-01), Kimmelman
patent: 5247280 (1993-09-01), Brooks
patent: 5585784 (1996-12-01), Pabla et al.
patent: 5805061 (1998-09-01), Fritz et al.
Crofts Bruce W.
Davis Christopher F.
Dreon Michael Joseph
Jozwiak Andrew Joseph
Kiko Jeffrey S.
Cichosz Vincent A.
General Motors Corporation
Lefkowitz Edward
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