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MULTI-PHASE ENGINE STOP POSITION CONTROL

  • US 20110253099A1
  • Filed: 04/14/2010
  • Published: 10/20/2011
  • Est. Priority Date: 04/14/2010
  • Status: Active Grant
First Claim
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1. A method for controlling an engine stop position in a vehicle having an engine with auto stop/auto start functionality and a crankshaft, the method comprising:

  • automatically ramping down engine speed upon initiation of an auto stop event;

    executing closed-loop speed control of the engine when the engine speed ramps down, and for as long as the engine speed remains above a threshold engine speed;

    executing closed-loop position control of the engine while ramping down the engine speed when a predetermined condition is detected; and

    stopping the crankshaft of the engine to within a calibrated range of a targeted engine stop position.

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