Automatic leveling apparatus for use with automobile headlamps
US6183118A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 1999 |
| Grant date | Feb 6, 2001 |
| Priority date | — |
| Expiry date | Aug 11, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60Q2300/132
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An automobile headlamp automatic leveling apparatus is provided. A headlamp whose light axis is tilted upward and downward in relation to a vehicle body by means of an actuator, a control unit for controlling the operation of the actuator, vehicle speed detection means for detection of the speed of the vehicle; and pitch angle detection means for detecting a pitch angle of the vehicle are included in the leveling apparatus. The control unit controls the operation of the actuator on the basis of a detected pitch angle such that the light axis of the headlamp maintains a constant, predetermined angle in relation to the road surface. While the vehicle is stationary, the control unit controls operation of the actuator at the time of illumination of the headlamp. Subsequently, while the vehicle remains stationary, the operation of the actuator is controlled at given time intervals which are counted by an interval timer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.