Motor vehicles – Steering gear – With electric power assist
Patent
1996-05-10
1998-08-04
DePumpo, Daniel G.
Motor vehicles
Steering gear
With electric power assist
180443, 701 42, B62D 504
Patent
active
057880107
ABSTRACT:
An electric power steering apparatus, which provides a steering assist of an electric motor directly to a vehicle steering system to reduce necessary steering power to be applied by a vehicle driver, is provided with a control unit which includes a proportion-coefficient and integration-coefficient setting section for, on the basis of a velocity of the vehicle detected by a velocity sensor, setting sensitivity of a proportioning element and integration gain of an integrating element in such a manner that they take greater values during high-velocity running of the vehicle than during low-velocity running of vehicle. This prevents occurrence of unwanted noises and vibrations during low-velocity running of the vehicle and also enhances steering response during high-velocity running of the vehicle, thus always providing an optimum steering feeling in changing running conditions of the vehicle. The control unit may further include a compensation section provided between an offset calculation section and a proportional and integral control section for, on the basis of the velocity detected by the velocity sensor, modifying the offset signal in such a manner that the offset signal takes a greater value during high-velocity running of the vehicle than during low-velocity running of vehicle.
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patent: 5482129 (1996-01-01), Shimizu
Hironaka Shinzi
Mukai Yoshinobu
Noro Yoshiki
DePumpo Daniel G.
Honda Giken Kogyo Kabushiki Kaisha
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