Controller and control method for internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorRyusuke KURODA
Life of this patent
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Abstract
A blow-by gas treating device discharges blow-by gas into intake air. A controller selects and executes one of a fuel cutoff process and a fuel introduction process when stopping combustion in a cylinder under a situation in which a crankshaft of the internal combustion engine is rotating. An injection valve controlling section controls a fuel injection valve to regulate a fuel injection amount in a period in which the combustion in the cylinder is stopped under the situation in which the crankshaft is rotating. The injection valve controlling section decreases the fuel injection amount from the fuel injection valve as an oil temperature that is the temperature of engine oil increases.
Claims8
A controller for an internal combustion engine, the internal combustion engine comprising a blow-by gas treating device that discharges blow-by gas into intake air and being configured to burn, in a cylinder, air-fuel mixture containing fuel injected from a fuel injection valve by spark discharge of an ignition device, wherein
- the controller is configured to select and execute one of a fuel cutoff process and a fuel introduction process when stopping combustion in the cylinder under a situation in which a crankshaft of the internal combustion engine is rotating,
- the fuel cutoff process stops fuel injection of the fuel injection valve,
- the fuel introduction process causes the fuel injection valve to inject fuel, thereby allowing the fuel to flow out unburned from the cylinder to an exhaust passage,
- the controller further comprises an injection valve controlling section,
- the injection valve controlling section is configured to control the fuel injection valve to regulate a fuel injection amount in a period in which the combustion in the cylinder is stopped under the situation in which the crankshaft is rotating, and
- the injection valve controlling section is further configured to decrease the fuel injection amount from the fuel injection valve as an oil temperature that is the temperature of engine oil increases.
A control method for an internal combustion engine, the internal combustion engine comprising a blow-by gas treating device that discharges blow-by gas into intake air and being configured to burn, in a cylinder, air-fuel mixture containing fuel injected from a fuel injection valve by spark discharge of an ignition device, the method comprising:
- selecting and executing one of a fuel cutoff process and a fuel introduction process when stopping combustion in the cylinder under a situation in which a crankshaft of the internal combustion engine is rotating, wherein the fuel cutoff process stops fuel injection of the fuel injection valve, and the fuel introduction process causes the fuel injection valve to inject fuel, thereby allowing the fuel to flow out unburned from the cylinder to an exhaust passage;
- adjusting of controlling the fuel injection valve to regulate a fuel injection amount in a period in which the combustion in the cylinder is stopped under the situation in which the crankshaft is rotating;
- and
- decreasing the fuel injection amount from the fuel injection valve as an oil temperature that is the temperature of engine oil increases.
A non-transitory computer readable memory medium storing a program that causes a processor to perform a controlling process of an internal combustion engine, the internal combustion engine comprising a blow-by gas treating device that discharges blow-by gas into intake air and being configured to burn, in a cylinder, air-fuel mixture containing fuel injected from a fuel injection valve by spark discharge of an ignition device, the controlling process comprises:
- selecting and executing one of a fuel cutoff process and a fuel introduction process when stopping combustion in the cylinder under a situation in which a crankshaft of the internal combustion engine is rotating, wherein the fuel cutoff process stops fuel injection of the fuel injection valve, and the fuel introduction process causes the fuel injection valve to inject fuel, thereby allowing the fuel to flow out unburned from the cylinder to an exhaust passage;
- adjusting of controlling the fuel injection valve to regulate a fuel injection amount in a period in which the combustion in the cylinder is stopped under the situation in which the crankshaft is rotating;
- and
- decreasing the fuel injection amount from the fuel injection valve as an oil temperature that is the temperature of engine oil increases.
Dependencies are inferred from the claim text.