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Control Device for Internal Combustion Engine

  • US 20180313287A1
  • Filed: 04/16/2018
  • Published: 11/01/2018
  • Est. Priority Date: 04/28/2017
  • Status: Active Grant
First Claim
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1. A control device for an internal combustion engine, the control device comprising an electronic control unit configured to determine whether or not cylinder-specific air-fuel ratio processing is being executed in which an air-fuel ratio of at least one of a plurality of cylinders of the internal combustion engine is controlled to be a rich air-fuel ratio lower than a stoichiometric air-fuel ratio and an air-fuel ratio of at least one of the other cylinders is controlled to be a lean air-fuel ratio higher than the stoichiometric air-fuel ratio, wherein:

  • the electronic control unit is configured, when the electronic control unit determines that the cylinder-specific air-fuel ratio processing is not being executed, to update a first learning value in which a result of comparison between a knock strength of the internal combustion engine and a first determination value is reflected; and

    the electronic control unit is configured, when the electronic control unit determines that the cylinder-specific air-fuel ratio processing is being executed, to prohibit updating of the first learning value and to calculate a target ignition timing of the internal combustion engine based on the first learning value.

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