| 摘要 |
If an amount of fuel is not increased and a direct injection air-fuel ratio learning has not been completed, fuel injection from a port fuel injection valve is stopped without executing EGR, fuel injection control is executed such that the fuel injection occurs only from an in-cylinder fuel injection valve, and the direct injection air-fuel ratio learning is executed. If the amount of the fuel is increased, the fuel injection from the port fuel injection valve is stopped without executing EGR and air-fuel ratio feedback control, and an engine and an EGR valve are controlled such that fuel injection occurs only from the in-cylinder fuel injection valve. |
| 主权项 |
1. A control device for an internal combustion engine equipped with
an in-cylinder fuel injection valve configured to inject fuel into a cylinder, a port fuel injection valve configured to inject the fuel into an intake port, a purification catalyst provided in an exhaust system, and an exhaust gas recirculation device configured to recirculate exhaust gas of the internal combustion engine to an intake system of the internal combustion engine, the control device comprising: a controller configured to execute first control in which a temperature of a catalyst is adjusted by increasing a fuel injection amount in comparison with an amount during normal operation, the controller being configured to execute second control in which a fuel injection amount of the in-cylinder fuel injection valve is learned by stopping fuel injection from the port fuel injection valve and executing fuel injection from the in-cylinder fuel injection valve such that an air-fuel ratio approaches a theoretical air-fuel ratio, the controller being configured to execute the fuel injection from the port fuel injection valve and execute exhaust gas recirculation control by the exhaust gas recirculation device when the first control is not executed and execution of the second control has been completed, the controller being configured to stop the fuel injection from the port fuel injection valve and the exhaust gas recirculation control by the exhaust gas recirculation device and execute fuel injection control from the in-cylinder fuel injection valve and the second control, when the first control is not executed and the execution of the second control has not been completed, and the controller being configured to stop the fuel injection from the port fuel injection valve and the exhaust gas recirculation control by the exhaust gas recirculation device when the first control is executed, and execute the fuel injection from the in-cylinder fuel injection valve with a fuel injection amount based on a learning value obtained through the second control. |
