Idle air control valve stepper motor initialization technique
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United States of America Patent
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Mar 20, 2007
Grant Date -
Jan 18, 2007
app pub date -
Jul 13, 2005
filing date -
Jul 13, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
A system for controlling idle air flow for an engine. The system includes an idle air control valve, a stepper motor, and a controller. The idle air control valve has a first hard stop and a second hard stop. The stepper motor is coupled to the idle air control valve and configured to manipulate the position of the idle air control valve. The controller is in communication with the stepper motor to provide a driving signal. Further, the controller is configured to drive the idle air control valve to the first hard stop and then drive the idle air control valve to the second hard stop after receiving an engine shutdown command.
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