Internal combustion engine control device and method for controlling fuel injection valve of internal combustion engine

An internal combustion engine control device to control a fuel injection valve, comprising:

• valve-close delay time acquisition circuitry configured to acquire a valve-close delay time of the fuel injection valve;
• first learning value calculation circuitry configured to calculate a first learning value based on the valve-close delay time when a running state of an internal combustion engine satisfies a predetermined learning condition;
• valve-open time calculation circuitry configured to calculate a valve-open time of the fuel injection valve based on the first learning value;
• second learning value calculation circuitry configured to calculate a second learning value based on the valve-close delay time irrespective of the running state of the internal combustion engine;
• and
• learning state determination circuitry configured to determine a learning state of the first learning value based on a relationship between the first learning value and second learning value.

An internal combustion engine control device to control a fuel injection valve, comprising:

• valve-close delay time acquisition means for acquiring a valve-close delay time of the fuel injection valve;
• first learning value calculation means for calculating a first learning value based on the valve-close delay time when a running state of an internal combustion engine satisfies a predetermined learning condition;
• valve-open time calculation means for calculating a valve-open time of the fuel injection valve based on the first learning value;
• second learning value calculation means for calculating a second learning value based on the valve-close delay time irrespective of the running state of the internal combustion engine;
• and
• learning state determination means for determining a learning state of the first learning value based on a relationship between the first learning value and second learning value.

A method for controlling a fuel injection valve of an internal combustion engine, comprising:

• acquiring a valve-close delay time of the fuel injection valve;
• calculating a first learning value based on the valve-close delay time when a running state of an internal combustion engine satisfies a predetermined learning condition;
• calculating a valve-open time of the fuel injection valve based on the first learning value;
• calculating a second learning value based on the valve-close delay time irrespective of the running state of the internal combustion engine;
• and
• determining a learning state of the first learning value based on a relationship between the first learning value and second learning value.