Electric power steering system for a motor vehicle
US4653601A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1985 |
| Grant date | Mar 31, 1987 |
| Priority date | — |
| Expiry date | Dec 27, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62D5/0475
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In an electric power steering system, a d.c. motor is drivingly connected to a steering shaft with a steering for generating an assisting power to rotate the steering shaft. Independently of an alternator for charging a battery, a d.c. generator driven by a vehicle engine is dedicated for supplying an electric power to the d.c. motor. A control circuit is responsive to a signal representing a manual torque applied to the steering and reads out one of objective values from a memory. The control circuit is further responsive to a fed-back signal indicative of a load applied to the d.c. motor and controls electric current flowing across a field coil of the d.c. generator in such a manner that the difference between the read-out objective value and the fed-back signal becomes zero.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.