Controller and control method for internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsYuto IKEDA, Yuki NOSE, Yoshiyuki SHOGENJI, Hirokazu ANDO
Life of this patent
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Abstract
An engine controller executes a fuel introduction process of introducing, in a state in which the crankshaft of an internal combustion engine is rotating, air-fuel mixture that contains fuel injected by a fuel injection valve into the exhaust passage without burning the air-fuel mixture in the cylinder. When the oxygen concentration of exit gas that has passed through a three-way catalyst decreases during the execution of the fuel introduction process, the engine controller executes a stopping process of stopping the fuel introduction process.
Claims5
A controller for an internal combustion engine, wherein
- the internal combustion engine includes
- a fuel injection valve,
- a cylinder into which air-fuel mixture containing fuel injected by the fuel injection valve is introduced,
- an ignition device that spark-ignites the air-fuel mixture introduced into the cylinder,
- an exhaust passage through which gas discharged from inside the cylinder flows,
- a three-way catalyst provided in the exhaust passage, and
- a sensor that is provided in the exhaust passage and detects a state of an oxygen concentration of exit gas, which is gas that has passed through the three-way catalyst, and
- the controller is configured to execute:
- a fuel introduction process of introducing, in a state in which a crankshaft of the internal combustion engine is rotating, the air-fuel mixture that contains the fuel injected by the fuel injection valve into the exhaust passage without burning the air-fuel mixture in the cylinder;
- and
- a stopping process of stopping the fuel introduction process when a detection value of the sensor indicates a decrease of the oxygen concentration of the exit gas during the execution of the fuel introduction process.
A controller for an internal combustion engine, wherein
- the internal combustion engine includes
- a fuel injection valve,
- a cylinder into which air-fuel mixture containing fuel injected by the fuel injection valve is introduced,
- an ignition device that spark-ignites the air-fuel mixture introduced into the cylinder,
- an exhaust passage through which gas discharged from inside the cylinder flows,
- a three-way catalyst provided in the exhaust passage, and
- a sensor that is provided in the exhaust passage and detects a state of an oxygen concentration of exit gas, which is gas that has passed through the three-way catalyst, and
- the controller includes circuitry that is configured to execute:
- a fuel introduction process of introducing, in a state in which a crankshaft of the internal combustion engine is rotating, the air-fuel mixture that contains the fuel injected by the fuel injection valve into the exhaust passage without burning the air-fuel mixture in the cylinder;
- and
- a stopping process of stopping the fuel introduction process when a detection value of the sensor indicates a decrease of the oxygen concentration of the exit gas during the execution of the fuel introduction process.
A control method for an internal combustion engine, wherein
- the internal combustion engine includes
- a fuel injection valve,
- a cylinder into which air-fuel mixture containing fuel injected by the fuel injection valve is introduced,
- an ignition device that spark-ignites the air-fuel mixture introduced into the cylinder,
- an exhaust passage through which gas discharged from inside the cylinder flows,
- a three-way catalyst provided in the exhaust passage, and
- a sensor that is provided in the exhaust passage and detects a state of an oxygen concentration of exit gas, which is gas that has passed through the three-way catalyst, and
- the control method comprises:
- introducing, in a state in which a crankshaft of the internal combustion engine is rotating, the air-fuel mixture that contains the fuel injected by the fuel injection valve into the exhaust passage without burning the air-fuel mixture in the cylinder;
- and
- stopping the fuel introduction process when a detection value of the sensor indicates a decrease of the oxygen concentration of the exit gas during the execution of the fuel introduction process.
Dependencies are inferred from the claim text.