Method and apparatus for traction control (ASR)
US4971400A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 14, 1989 |
| Grant date | Nov 20, 1990 |
| Priority date | — |
| Expiry date | Jul 14, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S303/06
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A system for traction control (ASR) and an aid for initiating movement on an incline for spinning wheels in an anti-skid brake system (ABS) having ABS multi-positional control valves between the wheel brake cylinders and the master brake cylinder. The system includes a tank chamber for receiving a volume of pressure fluid, and a recirculating pump for pumping fluid during a traction control. The driver first actuates the brake to stop the vehicle, then by switch actuation, triggers an ASR reversing valve that interrupts fluid communication with a master brake cylinder, whereupon on starting movement, the ABS control valves are triggered to relieve the brake pressure into the tank chamber and then, if a wheel is spinning, the recirculating pump for generating brake pressure and the ABS control valve acted upon it for ASR brake pressure modulation are selectively triggered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.