Controller for a movable motor vehicle headlamp mechanism

Details Controller for a movable motor vehicle headlamp mechanism Controller for a movable motor vehicle headlamp mechanism

1984-01-09

1985-12-10

Chatmon, Saxfield

Electric lamp and discharge devices: systems

Special application

Vehicle

362 65, 307 10LS, 318256, 318264, 318282, 318459, 318468, B60Q 102

Patent

active

045582599

ABSTRACT:
A control unit for operating the motor of a motor driven headlamp carrier mechanism includes oscillator circuitry for generating a series of pulses for energizing the motor, voltage responsive means for sensing a motor counter-EMF related voltage as an indication of motor rotation, output circuitry for interrupting motor energization when the voltage responsive circuitry senses motor stall, and start circuitry for energizing the motor independent of the oscillator circuitry for a period of time sufficient to produce motor counter-EMF. Such control permits sensing of the engagement of the headlamp carrier with fixed mechanical stops without the use of position or torque limit switches.

REFERENCES:
patent: 3601594 (1971-08-01), Carbary
patent: 3617835 (1971-11-01), Dreher
patent: 3728604 (1973-04-01), Grygera
patent: 4001661 (1977-01-01), Terabayashi
patent: 4282561 (1981-08-01), Yano
patent: 4461975 (1984-07-01), Osaki et al.
patent: 4486818 (1984-12-01), Hashimoto et al.
patent: 4514670 (1985-04-01), Fassel et al.

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