Control apparatus for internal combustion engine (as amended)
AssigneeToyota Jidosha Kabushiki Kaisha
InventorKoshiro KIMURA
Life of this patent
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Abstract
A control apparatus for an internal combustion engine according to the present invention includes a spark plug (30) for igniting an air-fuel mixture in a cylinder, and is configured to be capable of measuring a discharge voltage of the spark plug (30). The control apparatus calculates a turbulence intensity index value that indicates the turbulence intensity of in-cylinder gas based on a predetermined frequency component extracted from a discharge voltage during at least a part of a discharge duration leading up to ignition and, in accordance with the turbulence intensity index value, adjusts the ignition energy that is supplied to the spark plug (30) during a combustion duration in a cycle in which the turbulence intensity index value is calculated.
Claims30
A control apparatus for an internal combustion engine, comprising:
- a spark plug for igniting an air-fuel mixture in a cylinder;
- and
- an electronic control unit, the electronic control unit being programmed to:
- measure a discharge voltage of the spark plug;
- and
- calculate a turbulence intensity index value that indicates a turbulence intensity of in-cylinder gas based on a predetermined frequency component that is extracted from a discharge voltage during at least a part of a discharge duration leading up to ignition, and adjust, in accordance with the turbulence intensity index value, an ignition energy that is supplied to the spark plug during a combustion duration in a cycle in which the turbulence intensity index value is calculated.
A control apparatus for an internal combustion engine, comprising:
- a spark plug for igniting an air-fuel mixture in a cylinder;
- and
- an electronic control unit, the electronic control unit programmed to:
- measure a discharge voltage of the spark plug;
- and
- estimate a turbulent burning velocity that is a burning velocity in a turbulent flow state of an air-fuel mixture in the cylinder based on a predetermined frequency component that is extracted from a discharge voltage during at least a part of a discharge duration leading up to ignition.
Dependencies are inferred from the claim text.