Power Steering Systems
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United States of America Patent
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Issued Date -
Apr 21, 2011
app pub date -
Dec 21, 2006
filing date -
Dec 23, 2005
priority date (Note) -
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Abstract
A power steering system comprises a hydraulic circuit, a pump arranged to pressurize hydraulic fluid and valve means arranged to control the flow of pressurized fluid in the hydraulic circuit to control the steering force provided by the system. The system further comprises a motor arranged to drive the pump and control means arranged to control operation of the motor, and the control means is arranged to determine the position of the motor from a plurality of parameters by means of a position determining algorithm.
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