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Corrector device for automatically correcting the beam direction of vehicle headlamps to compensate for variations in vehicle trim

  • US 4,620,267 A
  • Filed: 12/11/1985
  • Issued: 10/28/1986
  • Est. Priority Date: 12/14/1984
  • Status: Expired due to Term
First Claim
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1. A device for automatically correcting the beam direction of a vehicle headlamp when the trim of said vehicle changes, said device comprising:

  • an illumination sensor integrated in the vehicle headlamp and fixed to move therewith, said sensor being disposed to detect the luminance of the road in at least one direction at a predetermined angle with the horizontal, said luminance being detected in a region of the road lying in the field illuminated by the headlamp, and said sensor being suitable for generating a signal representative of said detected luminance;

    an actuator for varying the inclination of the headlamp sensor assembly relative to the vehicle; and

    processor means for generating an actuator control signal as a function of the signal generated by said sensor, in such a manner as to servocontrol sdaid region of the road to have constant luminance.

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