Power steering apparatus

Details Power steering apparatus Power steering apparatus

2005-09-20

2005-09-20

DePumpo, Daniel G. (Department: 3611)

Motor vehicles

Steering gear

With fluid power assist

C180S417000

Reexamination Certificate

active

06945351

ABSTRACT:
In a power steering apparatus, a basic-target-rotational-speed setting portion42sets a basic target rotational speed Rb of an electric motor27on the basis of the vehicle speed and the angular velocity of steering. A temperature-coefficient setting portion43sets a temperature coefficient α which becomes smaller with an increase in the temperature. A target-rotational-speed setting portion44sets a target rotational speed R of the electric motor27on the basis of the formula R=α·Rb. A motor-drive control portion45controls a drive circuit28so that this target rotational speed R will be attained.

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