Control device for internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsYuto IKEDA, Yuki NOSE, Takanobu GOTOH
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Abstract
When a temperature increasing process is performed, a CPU sets a target temperature of a catalyst to be lower when a coolant temperature is low than when the coolant temperature is high. The CPU decreases an increase coefficient of fuel in the temperature increasing process when a value obtained by subtracting an estimated value of a temperature of the catalyst from the target temperature is equal to or less than a first prescribed value.
Claims6
A control device for an internal combustion engine that is applied to a multi-cylinder internal combustion engine including a post-processing device for exhaust gas in an exhaust passage, the control device being configured to perform:
- an acquisition process of acquiring a temperature of the multi-cylinder internal combustion engine;
- a setting process of setting a target temperature of the post-processing device;
- and
- a temperature increasing process of increasing a temperature of the post-processing device to the target temperature,
- wherein the temperature increasing process includes a stopping process and a rich combustion process,
- wherein the stopping process is a process of stopping combustion control in at least one cylinder of a plurality of cylinders,
- wherein the rich combustion process is a process of setting an air-fuel ratio of an air-fuel mixture in the other cylinders other than the at least one cylinder out of the plurality of cylinders to be less than a stoichiometric air-fuel ratio, and
- wherein the setting process is a process of setting the target temperature to a lower temperature when the temperature acquired in the acquisition process is low than when the temperature is high.
Dependencies are inferred from the claim text.