Method of and apparatus for controlling steering operation of a motor vehicle with steerable front and rear wheels
US4939653A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1988 |
| Grant date | Jul 3, 1990 |
| Priority date | — |
| Expiry date | Jul 29, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D7/159
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The steering operation of a motor vehicle with steerable front and rear road wheels is controlled by steering the rear road wheels with an actuator such as an electric motor which produces a steering force dependent on a deviation of the actual rear wheel steering angle from a target rear wheel steering angle. The rear road wheels are thus controlled with a characteristic dependent on the coefficient of friction of a road on which the motor vehicle travels and the steering speed at which the motor vehicle is steered. Typically, a steering control method comprises the steps of detecting the steering angle of the front road wheels, determining a target steering angle for the rear wheels based on the steering angle of the front road wheels, detecting the actual steering angle of the rear road wheels, calculating a steering angle deviation of the actual rear wheel steering angle from the target steering angle, determining a rear wheel steering force based on the steering angle deviation, and steering the rear road wheels to the target steering angle with the determined rear wheel steering force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.