Hydraulic system for a servo steering of a motor vehicle
US5127311A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 4, 1991 |
| Grant date | Jul 7, 1992 |
| Priority date | — |
| Expiry date | Feb 4, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D6/02
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The hydraulic system for a servo steering of a motor vehicle, incorporates a main valve mechanism producing the assistance pressure (Pa) applied to a hydraulic assistance device (12) and including a pair of parallel fluid circuits between a source (14) of pressurized fluid and a reservoir (16), each fluid circuit comprising at least two restrictions (1,2,1',2') capable of being modulated by a rotor mechanism (10) cooperating with a stator mechanism (11), the junction point of the restrictions of each circuit being connected to a respective chamber of the hydraulic assistance device (12) and a secondary valve mechanism producing the reaction pressure (Pr) applied to the steering wheel shaft and including a second pair of parallel fluid circuits between a source (24) of pressurized fluid and a reservoir (16), each of the fluid circuits comprising at least two restrictions (3,4,3',4') capable of being modulated by the rotor mechanism (10) cooperating with stator means, the rotor mechanism (11) cooperating with the steering wheel shaft, the source (14) of pressurized fluid of the main valve mechanism supplies a fixed flow of fluid and the source (24) of pressurized fluid of the seconda…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.