Power steering system

Details Power steering system Power steering system

2005-01-18

2005-01-18

Morris, Lesley D. (Department: 3611)

Motor vehicles

Steering gear

With fluid power assist

C180S421000, C701S042000

Reexamination Certificate

active

06843342

ABSTRACT:
Provision of a power steering system capable of giving a driver no discomfort during high-speed travel. A controller calculates or stores a current instruction value I1in accordance with a steering angle supplied from a steering angle sensor and a current instruction value I2in accordance with a steering angular velocity; performs multiplication of the steering angle base current instruction value I1and the steering angular velocity base current instruction value I2by current instruction values I5,I6set based on a vehicle speed, respectively; applies current instruction values I7,I8in accordance with the vehicle speed serving as limit values to the corresponding steering angle base and steering angular velocity base current instruction values resulting from the multiplication; selects a larger value of the two current instruction values below the limit values; and determines the selected value as a solenoid current instruction value SI.

REFERENCES:
patent: 6173223 (2001-01-01), Liubakka et al.
patent: 6484081 (2002-11-01), Nakashima
patent: 6484841 (2002-11-01), Takai et al.
patent: 6499557 (2002-12-01), Takai et al.

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