Arrangement for controlling the pressure reduction by means of an anti-lock brake system
US4718736A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1986 |
| Grant date | Jan 12, 1988 |
| Priority date | — |
| Expiry date | Jun 20, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T8/17616
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
To modulate the pressure reduction when controlling wheel slip by means of an anti-lock hydraulic brake system, electric signals representative of the rotational behavior of the individual wheels are reconditioned and combined electronically. Upon the occurrence of a tendency to lock, a pressure-reducing valve (17, 17', 19, 19', 21, 21') is actuated pulsewise, and thereby pressure fluid out of the wheel brake cylinder is returned into a supply reservoir (11). When varying the pulse/pulse-pause ratio of the actuating signals (i.sub.AV), additionally the pressure/time characteristic curve of the brake system is taken into consideration by increasing the pulse/pulse-pause ratio after a predetermined period of time, that is time of pressure reduction or number of pulses, with the pressure-reducing signal continuing to exist. The change in the actuating signals (i.sub.AV) for the improvement of the pressure reduction is effected in one or in several steps or quasi-continuously.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.