Front and rear wheel steering device for vehicle
US4687216A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1986 |
| Grant date | Aug 18, 1987 |
| Priority date | — |
| Expiry date | Mar 27, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D7/1545
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In a front and rear wheel steering device for vehicle for variably controlling the steering angle ratio of rear wheels relative to the steering angle of front wheels according to a certain mathematical function of vehicle speed in such a manner that the rear wheels are steered in opposite phase relationship in a low speed range and in same phase relationship in a high speed range, by providing a selection means for manually selecting a special mathematical function for an extremely low speed range which will cause a same phase relationship at an extremely low speed and a smooth transition to the certain mathematical function, parking the car along a curbstone and changing the lateral position of the vehicle in a limited space are simplified since the rear part of the vehicle will not swing laterally. Since such a manual setting is not suitable for low to medium speed range, a means for automatically releasing the manual selection may be advantageously provided to the system to the end of reducing the burden on the driver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.