Electric power steering apparatus

Details Electric power steering apparatus Electric power steering apparatus

2005-04-05

2005-04-05

Winner, Tony (Department: 3611)

Motor vehicles

Steering gear

With electric power assist

C701S041000

Reexamination Certificate

active

06874595

ABSTRACT:
An electric power steering apparatus is provided, which includes a steering torque sensor for detecting steering torque exerted on a steering system, a motor for exerting assist steering torque on the steering system, a motor current sensor for detecting drive current of the motor, a target current setting section for determining target current to be supplied for the motor based on the steering torque, a feedback control section for executing feedback control based on a deviation between the target current and the drive current of motor and a feedforward control section for executing feedforward control based on the target current. The apparatus has a feature that gain of the feedforward control is adapted to be greater as the speed of a vehicle increases.

REFERENCES:
patent: 5927430 (1999-07-01), Mukai et al.
patent: 5992557 (1999-11-01), Nakamura et al.
patent: 6250419 (2001-06-01), Chabaan et al.
patent: 20030079933 (2003-05-01), Chabaan
patent: 2001-287658 (2001-10-01), None
patent: 2002-234457 (2002-08-01), None

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