Vehicle headlamp automatic adjusting device with sensor failure detection means
US6688761B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2001 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Nov 6, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60Q2300/322
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Output of each sensor arrangement is supplied to an ECU through a communication bus line. A value of a turning radius of a vehicle, which is used for adjusting directions of optical axes of swivel lights, is computed based on the output of each sensor arrangement in the ECU. When a majority of the computed values fall within a predetermined allowable range, the majority of the computed values are determined as normal, and the remaining of the computed values is determined as abnormal. The communication bus line is determined as abnormal when none of the output from the sensor arrangements is obtained. An optical axis control angle is computed based on the normal computed values and is used to drive actuators to adjust directions of the optical axes of the swivel lights.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.