Antiskid control with surface friction compensation
US4666218A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Aug 8, 1984 |
| Grant date | May 19, 1987 |
| Priority date | — |
| Expiry date | Aug 8, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T2270/416
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In an antiskid control system for the hydraulic braking system of a wheeled vehicle, the rotational speed of a vehicle wheel and the acceleration of the wheel are detected and levels of road surface friction are determined on the basis of the wheel speed and acceleration to give a first indication that the road has a high value of friction or a second indication that the road has a low value of friction. The wheel speed and acceleration are analyzed to detect a down-pressure mode to decrease the fluid pressure of the braking system and an up-pressure mode to increase the pressure. In response to the presence of the first indication, the down-pressure mode is effected at a lower rate and then at a higher rate. In response to the occurrence of the second indication, the down-pressure mode is effected at the higher rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.