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Engine control apparatus and a method for transitioning between an all cylinder operation mode and a deactivated cylinder operation mode of a multiple cylinder internal combustion engine

  • US 8,833,345 B2
  • Filed: 10/12/2011
  • Issued: 09/16/2014
  • Est. Priority Date: 10/15/2010
  • Status: Active Grant
First Claim
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1. A method for transitioning between an all-cylinder operation mode and a deactivated cylinder operation mode of a plurality of cylinders in an internal combustion engine, the plurality of cylinders having a firing sequence in the all-cylinder operation mode, the method comprising:

  • determining whether the internal combustion engine is operated under predetermined deceleration operating conditions when in the all-cylinder operation mode;

    individually deactivating at least two cylinders of the plurality of cylinders in a disenabling sequence that is different from the firing sequence if the internal combustion engine is operated under predetermined deceleration operating conditions;

    determining whether the internal combustion engine is operated under predetermined acceleration operating conditions when in the deactivated cylinder operation mode; and

    individually reactivating at least two cylinders of the plurality of cylinders in a reactivating sequence which is different from the firing sequence if the internal combustion engine is operated under predetermined acceleration operating conditions.

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