Power steering control device for monitoring reference voltage
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United States of America Patent
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-
Apr 10, 2007
Grant Date -
Dec 1, 2005
app pub date -
May 11, 2005
filing date -
May 13, 2004
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A power steering control device includes a torque sensor that detects a steering torque and outputs a torque signal having a torque neutral voltage is determined based on a predetermined reference voltage, a reference-voltage generator unit that generates the reference voltage, an A/D converter unit that A/D converts the torque signal and the reference voltage, a calculator unit that calculates a steering assist torque based on the A/D converted torque signal, a current controller unit that supplies a driving current in accordance with the assist torque to a steering assist motor, a reference-voltage generator unit that generates the reference voltage and outputs the reference voltage to the A/D converter unit and a fault diagnosis unit that monitors the A/D converted reference voltage and performs a predetermined fault diagnosis process.
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