Power steering apparatus and control system for power steering apparatus having a steering wheel angle detection device
First Claim
1. A control system for a power steering apparatus including a steering angle sensor means for detecting each revolution of a steering wheel from a predetermined datum including at said datum and to produce an output signal indicative thereof, said steering angle sensor means also being for detecting discrete angular positions of said steering wheel during each revolution thereof and to produce a signal indicative of each said angular position;
- a counter means for counting the signals indicative of each angular position;
vehicle velocity determination means;
resetting means for said counter means, whereby said resetting means reset the counter means when the vehicle velocity determination means indicates a velocity above a predetermined value and said steering angle sensor produces an output signal indicative of said predetermined datum; and
control means for effecting power steering control by utilising the count of said counter means as a parameter.
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Accused Products
Abstract
A control system for a power steering apparatus having a steering wheel angle detection device comprising a steering angle sensor for generating reference pulses at a plurality of steering wheel angle positions, including a neutral position of a steering wheel, and generating angle pulses as the steering wheel is rotated, an up/down counter for counting up or down the angle pulses supplied from the steering angle sensor depending on the direction of rotation of the steering wheel, and a vehicle velocity sensor for detecting the vehicle velocity. When the vehicle velocity detected by the vehicle velocity sensor is higher than a predetermined velocity and a reference pulse is detected by the steering angle sensor which is determined to be a steering wheel straight ahead position then the up/down counter is reset to zero.
47 Citations
12 Claims
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1. A control system for a power steering apparatus including a steering angle sensor means for detecting each revolution of a steering wheel from a predetermined datum including at said datum and to produce an output signal indicative thereof, said steering angle sensor means also being for detecting discrete angular positions of said steering wheel during each revolution thereof and to produce a signal indicative of each said angular position;
- a counter means for counting the signals indicative of each angular position;
vehicle velocity determination means;
resetting means for said counter means, whereby said resetting means reset the counter means when the vehicle velocity determination means indicates a velocity above a predetermined value and said steering angle sensor produces an output signal indicative of said predetermined datum; and
control means for effecting power steering control by utilising the count of said counter means as a parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- a counter means for counting the signals indicative of each angular position;
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12. A power steering apparatus having a control system therefor, said control system including a steering angle sensor means for detecting each revolution of a steering wheel from a predetermined datum including at said datum and to produce an output signal indicative thereof, said steering angle sensor means also for detecting discrete angular positions of said steering wheel during each revolution thereof and to produce a signal indicative of each said angular position;
- a counter means for counting the signals indicative of each angular position;
vehicle velocity determination means;
resetting means for said counter means, whereby said resetting means resets the counter means when the vehicle velocity determination means indicates a velocity above a predetermined value and said steering angle sensor produces an output signal indicative of said predetermined datum; and
control means for effecting power steering control by utilising the count of said counter means as a parameter.
- a counter means for counting the signals indicative of each angular position;
Specification