Vehicle headlamp system with series high beam daylight running lamp operation
US4928036A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 24, 1989 |
| Grant date | May 22, 1990 |
| Priority date | — |
| Expiry date | Jul 24, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60Q2400/30
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A headlamp system provides for the high beam headlamp filaments to be connected in series across the supply voltage for half voltage energization in daytime running lamp operation when the ignition switch is closed, a DRL enabling switch is open and the headlamp switch is not in a headlamp on condition. In normal high beam headlamp operation, the high beam filaments are connected across the supply voltage in parallel for full voltage energization. The DRL enabling switch may be a park brake switch. The headlamp switch may have a fog lamp energizing condition to energize fog lamps; and the system permits such energization when the headlamps are connected in series but not when they are connected in parallel in normal high beam operation. A circuit is provided to sense when one of the high beam filaments is burned out and latch the daytime running light operation off with a signal to the vehicle operator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.