Method and apparatus to regulate illumination range of a motor v

Details Method and apparatus to regulate illumination range of a motor v Method and apparatus to regulate illumination range of a motor v

1991-07-30

1993-01-26

Pellinen, A. D.

Electrical transmission or interconnection systems

Vehicle mounted systems

Automobile

307 101, 307120, 362 71, 315 82, B60Q 1076, B60Q 108, B60Q 110

Patent

active

051824604

ABSTRACT:
In a method and apparatus to regulate the illumination range of a motor vehicle in which, at a position on a front axle and at a position on a rear axle, signals are measured which are dependent upon the relative positions of a motor-vehicle body to the front axle and the rear axle, with a difference formation between the signal from the front axle and that of the rear axle being accomplished with a resulting difference signal, as a nominal-value signal, being filtered to a first average-value formation. The time for the first average-value formation is determined by a first filter (F1) time constant with positions of adjusting elements being regulated when the first filtered nominal-value deviates from a predetermined, or set, value. Simultaneously with the first average-value formation, a second average-value formation of the nominal-value signal with a second small, or short, filter (F2) time constant, and a third average-value formation of the nominal-value signal with a third, long, filter (F3) time constant takes place. The second, filtered, nominal-value signal is compared with the third, filtered, nominal-value signal, and upon the existence of a difference there between, a regulation from the first, filtered, nominal-value signal is switched over to the third, filtered, nominal-value signal and upon a termination of the difference is again switched over from the third, filtered, nominal-value signal to the first, filtered, nominal-value signal.

REFERENCES:
patent: 3617731 (1971-11-01), Fleury
patent: 3643082 (1972-02-01), Fleury
patent: 3973114 (1976-08-01), Martin
patent: 4037134 (1977-07-01), Loper
patent: 4858080 (1989-08-01), Oikawa
patent: 4870545 (1989-09-01), Hatanaka et al.
G. Couffinhal et al.; "Lighting Control Devices"; Electronics; London, England; Oct. 29-Nov. 2, 1979; pp. 200-204.

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