Control apparatus of internal combustion engine

A method of controlling an internal combustion engine equipped with a supercharger having a turbine provided to an exhaust path of the internal combustion engine and a compressor provided upstream of a throttle valve provided to an intake path of the internal combustion engine and rotating integrally with the turbine, comprising:

• detecting an internal pressure of an intake manifold formed of a portion including a surge tank and an intake manifold provided downstream of the throttle valve as an intake manifold pressure;
• detecting an internal intake temperature of the intake manifold as an intake manifold temperature;
• a waste gate valve that is provided to a bypass passage bypassing the turbine and changes a passage sectional area of the bypass passage by changing an opening degree;
• detecting a rotation speed of the internal combustion engine;
• calculating a pressure in the exhaust path provided upstream of the turbine as an exhaust pressure;
• calculating a pre-correction volumetric efficiency equivalent value, which is an index indicating an amount of air entering a cylinder of the internal combustion engine from the intake manifold at one of a predetermined opening degree and a predetermined opening degree indicated value of a waste gate valve, on the basis of the intake manifold pressure and the rotation speed of the internal combustion engine;
• and
• calculating an exhaust pressure for pre-correction volumetric efficiency equivalent value, which is an exhaust pressure corresponding to the pre-correction volumetric efficiency equivalent value, on the basis of the intake manifold pressure and the rotation speed of the internal combustion engine,
• wherein:
• a correction calculation parameter is calculated using the exhaust pressure, the exhaust pressure for pre-correction volumetric efficiency equivalent value, and the intake manifold pressure, and a post-correction volumetric efficiency equivalent value is calculated by correcting the pre-correction volumetric efficiency equivalent value using the correction calculation parameter;
• the amount of air entering the cylinder from the intake manifold is calculated on the basis of the post-correction volumetric efficiency equivalent value;
• and
• controlling fuel input into the internal combustion engine at least in part based on the calculated amount of air.

A control apparatus of an internal combustion engine controlling an internal combustion engine equipped with a supercharger having a turbine provided to an exhaust path of the internal combustion engine and a compressor provided upstream of a throttle valve provided to an intake path of the internal combustion engine and rotating integrally with the turbine, comprising:

• a waste gate valve that is provided to a bypass passage bypassing the turbine and changes a passage sectional area of the bypass passage by changing an opening degree;
• at least one non-transitory computer readable medium operable to store program code;
• at least one processor operable to read said program code and operate as instructed by the program code, the program code comprising:
• detecting an internal pressure of an intake manifold formed of a portion including a surge tank and an intake manifold provided downstream of the throttle valve as an intake manifold pressure;
• detecting an internal intake temperature of the intake manifold as an intake manifold temperature;
• detecting a rotation speed of the internal combustion engine;
• calculating a pressure in the exhaust path provided upstream of the turbine as an exhaust pressure;
• calculating that calculates a pre-correction volumetric efficiency equivalent value, which is an index indicating an amount of air entering a cylinder of the internal combustion engine from the intake manifold at one of a predetermined opening degree and a predetermined opening degree indicated value of the waste gate valve, on the basis of the intake manifold pressure and the rotation speed of the internal combustion engine;
• and
• calculating an exhaust pressure for pre-correction volumetric efficiency equivalent value, which is an exhaust pressure corresponding to the pre-correction volumetric efficiency equivalent value, on the basis of the intake manifold pressure and the rotation speed of the internal combustion engine,
• wherein:
• a correction calculation parameter is calculated using the exhaust pressure, the exhaust pressure for pre-correction volumetric efficiency equivalent value, and the intake manifold pressure, and a post-correction volumetric efficiency equivalent value is calculated by correcting the pre-correction volumetric efficiency equivalent value using the correction calculation parameter;
• the amount of air entering the cylinder from the intake manifold is calculated on the basis of the post-correction volumetric efficiency equivalent value;
• and
• controlling fuel input amount to the internal combustion engine is at least in part based on the calculated amount of air.

A internal combustion engine equipped with a supercharger having a turbine provided to an exhaust path of the internal combustion engine and a compressor provided upstream of a throttle valve provided to an intake path of the internal combustion engine and rotating integrally with the turbine, comprising:

• an intake manifold pressure detector;
• an intake manifold temperature detector;
• a rotation speed detector;
• a waste gate valve that is provided to a bypass passage bypassing the turbine and changes a passage sectional area of the bypass passage by changing an opening degree;
• a control apparatus comprising:
• at least one non-transitory computer readable medium operable to store program code;
• at least one processor operable to read said program code and operate as instructed by the program code, the program code comprising:
• detecting an internal pressure, from the intake manifold pressure detector, of an intake manifold formed of a portion including a surge tank and an intake manifold provided downstream of the throttle valve as an intake manifold pressure;
• detecting an internal intake temperature, from the intake manifold temperature detector, of the intake manifold as an intake manifold temperature;
• detecting a rotation speed, from the rotation speed detector, of the internal combustion engine;
• calculating a pressure in the exhaust path provided upstream of the turbine as an exhaust pressure;
• calculating a pre-correction volumetric efficiency equivalent value, which is an index indicating an amount of air entering a cylinder of the internal combustion engine from the intake manifold at one of a predetermined opening degree and a predetermined opening degree indicated value of the waste gate valve, on the basis of the intake manifold pressure and the rotation speed of the internal combustion engine;
• and
• calculating an exhaust pressure for pre-correction volumetric efficiency equivalent value, which is an exhaust pressure corresponding to the pre-correction volumetric efficiency equivalent value, on the basis of the intake manifold pressure and the rotation speed of the internal combustion engine,
• wherein:
• a correction calculation parameter is calculated using the exhaust pressure, the exhaust pressure for pre-correction volumetric efficiency equivalent value, and the intake manifold pressure, and a post-correction volumetric efficiency equivalent value is calculated by correcting the pre-correction volumetric efficiency equivalent value using the correction calculation parameter;
• the amount of air entering the cylinder from the intake manifold is calculated on the basis of the post-correction volumetric efficiency equivalent value;
• and
• controlling fuel input amount to the internal combustion engine is at least in part based on the calculated amount of air.