Electric power steering system for a motor vehicle

Details Electric power steering system for a motor vehicle Electric power steering system for a motor vehicle

1985-12-27

1987-03-31

Love, John J.

Motor vehicles

Compensating devices

180142, B62D 504

Patent

active

046536019

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.

REFERENCES:
patent: 2454070 (1948-11-01), Le Tourneau
patent: 2860717 (1958-11-01), Jedrzykowski et al.
patent: 4437532 (1984-03-01), Nakamura et al.
patent: 4471280 (1984-09-01), Stack
patent: 4538698 (1985-09-01), Hashimoto et al.
patent: 4582155 (1986-04-01), Ohe
Automotive Technology Series, vol. 10, supervised by Takeshi Saito, published: Oct. 5, 1980, p. 42.

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