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MULTI-STROKE VARIABLE DISPLACEMENT ENGINE

  • US 20100012053A1
  • Filed: 07/17/2008
  • Published: 01/21/2010
  • Est. Priority Date: 07/17/2008
  • Status: Active Grant
First Claim
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1. A method of operating a vehicle propulsion system, said vehicle propulsion system including an internal combustion engine coupled to one or more drive wheels of the vehicle via a transmission, the method comprising:

  • operating the engine to produce an engine output;

    transferring the engine output to said one or more drive wheels via the transmission;

    responsive to a first condition, varying torque supplied to said one or more drive wheels by adjusting a relative number of combusting cylinders and deactivated cylinders of the engine; and

    responsive to a second condition, varying the torque supplied to said one or more drive wheels by adjusting a number of strokes performed by the combusting cylinders per combustion cycle while shifting the transmission between different gear ratios.

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