Controller for internal combustion engine and control method for internal combustion engine
AssigneeHonda Motor Co., Ltd.
InventorMitsuhiro IWADARE
Life of this patent
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Abstract
A controller for an internal combustion engine includes a detector and a processor. The detector detects a combustion condition of a gas in a cylinder of the internal combustion engine. The processor is configured to calculate a target combustion condition. The processor is configured to calculate an ignition timing such that the combustion condition detected by the detector becomes equal to the target combustion condition via a feedback control with a gain. The processor is configured to calculate a fuel ratio in the gas in the cylinder. The processor is configured to determine the gain so as to increase as the fuel ratio decreases.
Claims10
A controller for an internal combustion engine that performs a lean combustion operation in which a lean in-cylinder gas is injected and combusted in a cylinder,
- the controller comprising:
- a combustion condition parameter obtaining unit that obtains a combustion condition parameter representing a combustion condition of the in-cylinder gas;
- a target value setting unit that sets a target value for the combustion condition parameter;
- an ignition timing calculator that calculates ignition timing using a feedback control including a predetermined gain such that the obtained combustion condition parameter becomes equal to the set target value;
- a fuel ratio parameter obtaining unit that obtains a fuel ratio parameter representing a fuel ratio of the in-cylinder gas;
- and
- a gain setting unit that sets the gain for the feedback control at a larger value as the fuel ratio represented by the obtained fuel ratio parameter becomes lower.
A controller for an internal combustion engine that performs a lean combustion operation in which a lean in-cylinder gas is injected and combusted in a cylinder,
- the controller comprising:
- an in-cylinder flow controller that controls strength of a flow of the in-cylinder gas by changing a flow control parameter;
- a combustion condition parameter obtaining unit that obtains a combustion condition parameter representing a combustion condition of the in-cylinder gas;
- a target value setting unit that sets a target value for the combustion condition parameter;
- a flow control parameter calculator that calculates the flow control parameter for the in-cylinder flow controller using a feedback control including a predetermined gain such that the obtained combustion condition parameter becomes equal to the set target value;
- a fuel ratio parameter obtaining unit that obtains a fuel ratio parameter representing a fuel ratio of the in-cylinder gas;
- and
- a gain setting unit that sets the gain for the feedback control at a larger value as the fuel ratio represented by the obtained fuel ratio parameter becomes lower.
A controller for an internal combustion engine, comprising:
- a detector to detect a combustion condition of a gas in a cylinder of the internal combustion engine;
- and
- a processor configured to
- calculate a target combustion condition;
- calculate an ignition timing such that the combustion condition detected by the detector becomes equal to the target combustion condition via a feedback control with a gain;
- calculate a fuel ratio in the gas in the cylinder;
- and
- determine the gain so as to increase as the fuel ratio decreases.
A controller for an internal combustion engine, comprising:
- a detector to detect a combustion condition of a gas in a cylinder of the internal combustion engine;
- and
- a processor configured to
- calculate a target combustion condition;
- calculate a flow control parameter such that the combustion condition detected by the detector becomes equal to the target combustion condition via a feedback control with a gain;
- calculate a fuel ratio in the gas in the cylinder;
- determine the gain so as to increase as the fuel ratio decreases;
- and
- control strength of a flow of the gas in the cylinder by changing the flow control parameter.
A control method for an internal combustion engine, comprising:
- calculating a target combustion condition;
- calculating an ignition timing such that a combustion condition of a gas in a cylinder of the internal combustion engine becomes equal to the target combustion condition via a feedback control with a gain;
- calculating a fuel ratio in the gas in the cylinder;
- and
- determining the gain so as to increase as the fuel ratio decreases.
A control method for an internal combustion engine, comprising:
- calculating a target combustion condition;
- calculating a flow control parameter such that the combustion condition of a gas in a cylinder of the internal combustion engine becomes equal to the target combustion condition via a feedback control with a gain;
- calculating a fuel ratio in the gas in the cylinder;
- determining the gain so as to increase as the fuel ratio decreases;
- and
- controlling strength of a flow of the gas in the cylinder by changing the flow control parameter.
Dependencies are inferred from the claim text.