Servo-valve arrangement for power steering
US4898074A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 1, 1988 |
| Grant date | Feb 6, 1990 |
| Priority date | — |
| Expiry date | Jul 1, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D5/06
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In a servo-valve arrangement, a control piston is displaced as a function of steering forces to be applied which control piston in its turn controls throttling places in such a manner that a piston-cylinder aggregate is acted upon with a pressure difference and produces a force assisting the steering movement. A throttling section connected in parallel with the piston cylinder aggregate includes throttling places controlled by external parameters as well as by the system pressure and makes it possible to act upon the end faces of the control piston with a pressure difference in order to permit a force opposing the respective displacement of the control piston to act on the control piston. As a result thereof, an undesired overcontrol of the servo-valve arrangement, respectively, of the steering system controlled thereby is avoided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.