Vehicle steering system
US5481457A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1994 |
| Grant date | Jan 2, 1996 |
| Priority date | — |
| Expiry date | Mar 25, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D6/04
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Provided is a vehicle steering system which can substantially stabilize the lateral dynamic behavior of a vehicle with a simple control logic over the entire range of the vehicle speed. A steering torque proportional to a yaw rate and/or a lateral acceleration of the vehicle is applied to the steerable wheels to counteract a lateral deviation of the vehicle. To avoid the oscillatory or overshooting behavior of the control system, a damping torque is applied to the steering wheel. Thus, the counteracting steering torque is given as a mathematical function including a sum of a first term consisting of a product of a yaw rate and/or the lateral acceleration of the vehicle and a first coefficient, and a second term consisting of a product of an angular speed of the steering wheel and a second coefficient. In particular, the first coefficient and second coefficient are variable in a mutually proportional relationship so that the optimum selection of the first and second conditions can be done without any complication.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.