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System for controllably disabling cylinders in an internal combustion engine

  • US 6,619,258 B2
  • Filed: 01/15/2002
  • Issued: 09/16/2003
  • Est. Priority Date: 01/15/2002
  • Status: Expired due to Fees
First Claim
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1. A method of controllably disabling cylinders in an internal combustion engine, the method comprising the steps of:

  • determining air pressure within an intake manifold of the engine;

    determining rotational speed of the engine;

    determining road speed of a vehicle carrying the engine; and

    disabling operation of a number of cylinders of the engine while maintaining an engine/vehicle operating parameter near a desired value of the engine/vehicle operating parameter if the air pressure is below a pressure threshold, the rotational speed of the engine is greater than an engine speed threshold and the road speed of the vehicle is greater than a vehicle speed threshold.

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