Electric power steering system for vehicles

Details Electric power steering system for vehicles Electric power steering system for vehicles

1986-07-17

1988-05-24

Love, John J.

Motor vehicles

Compensating devices

B62D 504

Patent

active

047459840

ABSTRACT:
An electric power steering system (50) for vehicles has an electromagnetic servo device (1) including a drive control circuit (30, 40) for feeding a drive signal (Va) to an electric motor (14) for producing auxiliary torque to be supplied to an output shaft (6) in accordance with a steering torque signal (S.sub.1, S.sub.2) from a steering torque detection mechanism (32) which detects steering torque (Ts) acting on an input shaft (5) and a steering speed signal (S.sub.3, S.sub.4) from a steering speed detection mechanism (36) which detects the steering speed (Ns) of a steering wheel. The drive control circuit determines, of the motor drive signal, a component (D(L)) corresponding to the road surface side load and a component (D(F)) corresponding to the load due to friction elements of the servo device, depending on the steering torque signal, and a component (D(K.multidot.Nm)) corresponding to the steering speed, depending on the steering speed signal. The magnitude of the motor drive signal is determined as the sum of the road surface side load component, the frictional load component, and the steering speed component. The drive control circuit includes a microcomputer unit (30) for determining the road surface side load component and the frictional load component in an address designation manner in dependence on the steering torque signal and the steering speed component in an address designation manner in dependence on the steering speed signal.

REFERENCES:
patent: 2754465 (1956-07-01), Brier
patent: 3511104 (1970-05-01), Piat
patent: 4083422 (1978-04-01), Blakeslee et al.
patent: 4275340 (1981-06-01), Schleupen
patent: 4415054 (1983-11-01), Drutchas
patent: 4437532 (1984-03-01), Nakamura et al.
patent: 4448275 (1984-05-01), Kitagawa et al.
patent: 4454454 (1984-06-01), Valentine
patent: 4473128 (1984-09-01), Nakayama et al.
patent: 4509611 (1985-04-01), Kode et al.
patent: 4518055 (1985-05-01), Yagi et al.
patent: 4522278 (1985-06-01), Kitagawa et al.
patent: 4527653 (1985-07-01), Agarwal et al.
patent: 4530413 (1985-07-01), Buike et al.
patent: 4532567 (1985-07-01), Kade
patent: 4538698 (1985-09-01), Hashimoto et al.
patent: 4556116 (1985-12-01), O'Neil
patent: 4557342 (1985-12-01), Drutchas
patent: 4561515 (1985-12-01), Hashimoto et al.
patent: 4568863 (1986-02-01), Ruof
patent: 4570734 (1986-02-01), Taig
patent: 4573545 (1986-03-01), Kalns
patent: 4574903 (1986-03-01), Hashimoto et al.
patent: 4577716 (1986-03-01), Norton
patent: 4580649 (1986-04-01), Ohe et al.
patent: 4582155 (1986-04-01), Ohe et al.

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