Anti-lock braking systems (ABS) for road vehicles to avoid premature engagement of the anti-lock braking system
US5707121A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1995 |
| Grant date | Jan 13, 1998 |
| Priority date | — |
| Expiry date | Nov 24, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T8/173
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An anti-skid braking system for wheeled vehicles having fluid actuated brakes associated with the vehicle wheels. The anti-skid braking system includes speed sensors associated with the vehicle wheels, a scanning control device response to speed signals from the speed sensors to actuate a pressure dump device to periodically release the fluid pressure applied to the brake of any wheel which is determined, by detection of a predetermined level of relative slip between that wheel and the road surface to be about to lock. Later, the system, by detection, can re-apply the actuating pressure to that brake when the tendency of that wheel to lock has been reduced. Additionally, the system includes a control device adapted to adjust the magnitude of said predetermined level of relative slip to which said control device responds such as to reduce the slip sensitivity at the first sign of an impending skid condition, to maintain the slip sensitivity at this level for a period corresponding to the time needed by the axle to move rapidly through its available deflection, and to then restore the slip detection sensitivity to its normal level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.