Apparatus for automatically adjusting aiming of headlights of an

Details Apparatus for automatically adjusting aiming of headlights of an Apparatus for automatically adjusting aiming of headlights of an

1997-12-12

1999-03-02

Hofsass, Jeffery A.

Communications: electrical

Land vehicle alarms or indicators

External signal light system

3404572, 362464, 315 82, B60Q 126

Patent

active

058776800

ABSTRACT:
A pitch angle in the back-and-forth direction of the vehicle body is calculated based on output signals of height sensors disposed at front and rear wheels of the vehicle. A vehicle traveling speed is obtained. A vehicle acceleration is obtained from the vehicle traveling speed. Using the vehicle traveling speed and the vehicle acceleration, a judgement is made to determine the control mode corresponding to the vehicle traveling condition, by selecting one from the group consisting of a stopping mode, an acceleration mode, a deceleration mode and a constant-speed mode. An actuator target value (i.e., target aiming adjustment angle) is calculated in accordance with the determined control mode. To obtain this actuator target value, a filter is used to process the pitch angle so that the headlights do not dazzle an oncoming vehicle's driver. Then, the aiming adjustment for the headlights is performed by actuating actuators in accordance with the actuator target value. The pitch angle is adequately processed by using a preferable filter. Therefore, the aiming adjustment of the headlights is not performed unnecessarily or erroneously.

REFERENCES:
patent: 5182460 (1993-01-01), Hussman
patent: 5588733 (1996-12-01), Gotou
patent: 5633710 (1997-05-01), Kumra et al.
patent: 5645338 (1997-07-01), Kobayashi
patent: 5660454 (1997-08-01), Mori et al.

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