Steering force control device for power steering system
US4730687A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 1985 |
| Grant date | Mar 15, 1988 |
| Priority date | — |
| Expiry date | Dec 26, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D6/02
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A working fluid passage supplying a fixed flow rate is divided into passages so that a flow rate ratio between the two passages is varied by a variable orifice valve based on a detection signal of a physical quantity factor which varies depending on travelling and steering conditions of the vehicle. The working fluid from one of the two passages is supplied to a steering assisting force generating mechanism through a changeover valve which changes over the passages in accordance with a direction of steering torque acting on the input shaft steering the vehicle, to generate the steering assisting force. The working fluid from the other passage is supplied to a steering reaction force generating mechanism through the changeover valve, and by generating the steering reaction force to the input shaft, the steering force is controlled to an adequate condition corresponding to the physical quantity factor. Furthermore, the passage of the variable orifice valve at the side of the steering reaction force generating mechanism is connected to a drain through a changeover valve or a pressure regulating valve to thereby control the steering feeling to a more adequate condition, and at the same…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.