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

1993-03-02

Chin, Gary

Boots, shoes, and leggings

362 71, 307 108, B60Q 108

Patent

active

051915308

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 position 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. In order to be able to recognize inclination changes of the motor-vehicle body which cannot be attributed to changes in load or road surface unevenness, simultaneously with the first average-value formation, a second average-value formation of the nominal-value signal, with a second 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 thusly produced second filtered nominal-value signal is compared with the thusly produced third filtered nominal-value signal and upon the existence of a difference between the second filtered nominal-value signal and the third filtered nominal-value signal the first average-value formation is interrupted and upon termination of the difference is again turned on.

REFERENCES:
patent: 4583152 (1986-04-01), Kawai et al.
patent: 4620267 (1986-10-01), Cibie
patent: 4858080 (1989-08-01), Oikawa
patent: 4891559 (1990-01-01), Matsumoto et al.
patent: 4908560 (1990-03-01), Shibata et al.

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