Process and device for controlling headlight range of a motor vehicle
US6401020B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 24, 2000 |
| Grant date | Jun 4, 2002 |
| Priority date | — |
| Expiry date | Aug 24, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60Q2300/132
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Device for control of headlight range of a motor vehicle including a front axle transmitter (1) and a rear axle transmitter (2), which generate signals depending on a position of a vehicle chassis relative to a front axle and a rear axle of the vehicle, wherein the device further includes adjustment devices (14, 15), which can adjust the headlight range of the motor vehicle depending on these signals. The device further includes a speed transmitter (3) and a terrain recognition unit (24), with the terrain recognition unit (24) being connected to the front axle transmitter (1), the rear axle transmitter (2), and the speed transmitter (3). The terrain recognition unit can calculate and store a difference between the signals from the front axle transmitter (1) and the rear axle transmitter (2), subtract a previously calculated difference in the signals, divide the signal obtained by this subtraction by a signal corresponding to the speed of the vehicle, and compare the signal obtained by this division with a predetermined threshold value. The terrain recognition unit (24) decides that a poor road surface is present when the threshold value is exceeded, and possibly deactivates control…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.