Fail-safe mechanism having a driver circuit for controlling driving of an electrical system of a vehicle
US6498403B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Sep 1, 2000 |
| Grant date | Dec 24, 2002 |
| Priority date | — |
| Expiry date | Sep 18, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D5/0493
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The invention relates to a device that interrupts electric power to a driving circuit when a system failure is detected. A fail-safe mechanism is provided with a main switch circuit connected between a driving power source and a driver circuit; a sub switch circuit connected between the driving power source and the main switch circuit, and maintaining an OFF state in normal times; a timer circuit allowing the sub switch circuit for a predetermined time period after the driving power source is turned on; a failure detector circuit connected between the main switch circuit and a controller; and a sub switch control means bringing the sub switch circuit to an OFF state when the feeding of electric current is cut off. The main switch circuit is turned OFF when the failure detector circuit detects an abnormal condition of the controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.