Rear-wheel steering system for four-wheel steering vehicle
US5018594A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1989 |
| Grant date | May 28, 1991 |
| Priority date | — |
| Expiry date | Dec 18, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D7/159
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A rear-wheel steering system is provided in a four-wheel steering vehicle having at least a front-wheel steering angle sensor, a vehicle speed sensor, a control unit for carrying out rear-wheel steering control in dependency on signals detected by these sensors, and an electric motor controlled by the control unit to steer the rear wheels. This rear-wheel steering system is provided with detecting means for detecting front-wheel steering force, front-wheel lateral force or lateral acceleration of the vehicle. The control unit is provided with a front-wheel neutral point correction means for determining the zero point of the front-wheel steering angle which causes the rear-wheel steering angle to be zero with respect to a signal indicating that the front-wheel steering force, the front-wheel lateral force or the lateral acceleration of the vehicle thus detected by the detecting means is substantially zero.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.