Internal combustion engine control apparatus

An internal combustion engine control apparatus, comprising:

• outlet temperature detection means that detects an outlet temperature that is a temperature in a vicinity of an outlet of a purification catalyst that is disposed in an exhaust path of an internal combustion engine;
• turbine temperature detection means that detects a turbine temperature that is a temperature in a vicinity of an exhaust turbine of a turbo-supercharger that is disposed upstream of the purification catalyst in the exhaust path;
• degree of opening detection means that detects a degree of opening of a waste gate valve that opens and closes a bypass passage that bypasses the exhaust turbine of the turbo-supercharger;
• overlap control means that controls a valve overlap that is a state in which an intake valve and an exhaust valve of the internal combustion engine are open at the same time;
• outlet high temperature determination means that determines whether or not the outlet temperature is higher than an outlet high temperature reference value;
• and
• degree of opening determination means that determines whether or not the degree of opening is larger than a first degree of opening reference value;
• wherein:
• when it is determined that the outlet temperature is higher than the outlet high temperature reference value, and it is determined that it is not recognized that the degree of opening is greater than the first degree of opening reference value, the overlap control means limits a valve overlap amount to an amount that is less than a first reference amount at a time of a high outlet temperature;
• and
• when it is determined that the outlet temperature is higher than the outlet high temperature reference value and it is determined that the degree of opening is greater than the first degree of opening reference value, the overlap control means limits the valve overlap amount to an amount that is less than a second reference amount at a time of a high outlet temperature that is less than the first reference amount at a time of a high outlet temperature.

An internal combustion engine control apparatus, comprising:

• inlet temperature detection means that detects an inlet temperature that is a temperature in a vicinity of an inlet of a purification catalyst disposed in an exhaust path of an internal combustion engine;
• turbine temperature detection means that detects a turbine temperature that is a temperature on an upstream side of the vicinity of the inlet, and is a temperature in a vicinity of an exhaust turbine of a turbo-supercharger that is disposed in the exhaust path;
• degree of opening detection means that detects a degree of opening of a waste gate valve that opens and closes a bypass passage that bypasses an exhaust turbine of the turbo-supercharger that is disposed in the exhaust path;
• overlap control means that controls a valve overlap that is a state in which an intake valve and an exhaust valve of the internal combustion engine are open at the same time;
• inlet low temperature determination means that determines whether or not the inlet temperature is lower than an inlet low temperature reference value;
• turbine low temperature determination means that determines whether or not the turbine temperature is lower than a turbine low temperature reference value;
• and
• second degree of opening determination means that determines whether or not the degree of opening is less than a second degree of opening reference value;
• wherein:
• when it is determined that the inlet temperature is lower than the inlet low temperature reference value, it is determined that it is not recognized that the turbine temperature is lower than the turbine low temperature reference value, and it is determined that the degree of opening is lower than the second degree of opening reference value, the overlap control means limits the valve overlap amount to an amount that is less than a first reference amount at a time of a low temperature;
• and
• when it is determined that the inlet temperature is lower than the inlet low temperature reference value and it is determined that the turbine temperature is lower than the turbine low temperature reference value, or when it is determined that the inlet temperature is lower than the inlet low temperature reference value and it is determined that it is not recognized that the degree of opening is less than the second degree of opening reference value, the overlap control means limits the valve overlap amount to an amount that is less than a second reference amount at a time of a low temperature that is less than the first reference amount at a time of a low temperature.

An internal combustion engine control apparatus, comprising:

• an inlet temperature detector that detects an inlet temperature that is a temperature in a vicinity of an inlet of a purification catalyst disposed in an exhaust path of an internal combustion engine;
• a turbine temperature detector that detects a turbine temperature that is a temperature on an upstream side of the vicinity of the inlet of the purification catalyst, and that is a temperature in a vicinity of an exhaust turbine of a turbo-supercharger disposed in the exhaust path;
• overlap controller that controls a valve overlap that is a state in which an intake valve and an exhaust valve of the internal combustion engine are open;
• inlet high temperature determination device that determines whether or not the inlet temperature is lower than an inlet high temperature reference value;
• and
• turbine high temperature determination device that determines whether or not the turbine temperature is higher than a turbine high temperature reference value that is higher than the inlet high temperature reference value;
• wherein when it is determined that the inlet temperature is lower than the inlet high temperature reference value and it is determined that the turbine temperature is higher than the turbine high temperature reference value, the overlap controller increases a valve overlap amount so as to become greater than a turbine high temperature time reference amount.