CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE, AND CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE

摘要

A control apparatus includes an electronic control unit configured to: carry out a first diagnosis and a second diagnosis; control a first injection valve and a second injection valve such that fuel is injected from both the first injection valve and the second injection valve, and such that a fuel injection amount from the second injection valve is not reduced and a fuel injection amount from the first injection valve is reduced, when carrying out the first diagnosis; and control the first injection valve such that fuel is not injected from the first injection valve, and control the second injection valve such that the fuel injection amount from the second injection valve is reduced in a state where fuel is injected from the second injection valve, when carrying out the second diagnosis.

主权项

1. A control apparatus for an internal combustion engine, the internal combustion engine including a plurality of cylinders, a first injection valve configured to inject fuel into an intake passage, and a second injection valve configured to inject fuel into a corresponding one of combustion chambers, the first injection valve and the second injection valve being provided for each cylinder, the control apparatus comprising
an electronic control unit configured to:
carry out a first diagnosis and a second diagnosis in order to detect a degree of inter-cylinder imbalance in an amount of fuel supplied into each cylinder, the first injection valve of a target cylinder that is one of the plurality of cylinders being diagnosed through the first diagnosis, the second injection valve of the target cylinder being diagnosed through the second diagnosis;control the first injection valve of the target cylinder and the second injection valve of the target cylinder such that an amount of fuel supplied into the target cylinder is reduced when detecting the degree of the inter-cylinder imbalance;control the first injection valve of the target cylinder and the second injection valve of the target cylinder such that fuel is injected from both the first injection valve and the second injection valve when carrying out the first diagnosis; control the first injection valve of the target cylinder and the second injection valve of the target cylinder such that a fuel injection amount from the second injection valve is not reduced and a fuel injection amount from the first injection valve is reduced when carrying out the first diagnosis; control the first injection valve of the target cylinder such that fuel is not injected from the first injection valve when carrying out the second diagnosis; and control the second injection valve of the target cylinder such that the fuel injection amount from the second injection valve is reduced in a state where fuel is injected from the second injection valve when carrying out the second diagnosis.