Motor vehicles – Steering gear – With electric power assist
Patent
1998-08-26
2000-10-17
Dickson, Paul N.
Motor vehicles
Steering gear
With electric power assist
180443, B62D 504
Patent
active
061316938
ABSTRACT:
An electric power steering apparatus includes a control unit designed to be responsive to acceleration and deceleration of the vehicle and forward and revere movements of the vehicle for correcting a steering assist torque to be supplied from an electric motor to the steering system of a vehicle. The control unit includes an acceleration and deceleration calculating section, a front wheel load calculating section, a phase compensating section, a main control amount setting section and a damping correction value setting section. The acceleration and deceleration calculating section determines acceleration and deceleration on the basis of the direction and magnitude of a vehicle velocity detected by a vehicle velocity sensor. The front wheel load calculating section determines a front wheel load variation on the basis of the acceleration and deceleration. The phase compensating section perform phase compensation of a steering torque on the basis of the front wheel load variation. The main control amount setting section sets a main control amount on the basis of the phase-compensated torque and the vehicle velocity. The damping correction value setting section sets a damping correction value on the basis of the front wheel load variation. The main control amount and the damping correction value are used to determined a correction control amount which is used for controlling a current to be supplied to the electric motor.
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Mukai Yoshinobu
Noro Yoshiki
Dickson Paul N.
Honda Giken Kogyo Kabushiki Kaisha
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