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CONTROL FOR INTERNAL COMBUSTION ENGINE PROVIDED WITH CYLINDER HALTING MECHANISM

  • US 20090118975A1
  • Filed: 10/09/2008
  • Published: 05/07/2009
  • Est. Priority Date: 10/09/2007
  • Status: Active Grant
First Claim
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1. A control apparatus for an internal combustion engine having a fuel injection valve for directly injecting fuel into a combustion chamber of the engine, an ignition device for burning an air-fuel mixture containing the fuel injected from the fuel injection valve, and a variable cylinder management mechanism that is capable of changing the number of operating cylinders, comprising a control unit configured to:

  • make a transition to an operating mode where the number of operating cylinders is decreased through the variable cylinder management mechanism;

    predict, based on an operating condition of the engine, a state where an air-fuel ratio of an exhaust atmosphere of the engine becomes lean due to a stop of the fuel injection into one or more cylinders to be halted by the transition; and

    if it is predicted that the air-fuel ratio of the exhaust atmosphere becomes lean, cause the fuel injection valve to inject additional fuel to the one or more cylinders to be halted after ignition performed by the ignition device in a combustion cycle where the prediction was made.

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