Control apparatus and control method for internal combustion engine

A control method for an internal combustion engine which includes a supercharger driven by a motor, a bypass passage which is provided for the intake passage in such a manner as to bypass the supercharger, and a variable geometry turbocharge which is provided on a downstream side of the supercharger connected to the intake passage, comprising:

• detecting an operational state of the internal combustion engine;
• deciding a time at which the bypass passage is closed, based on the detected operational state;
• and
• controlling an area of an inlet opening portion through which exhaust gas flows into a turbine of the variable geometry turbocharger, wherein the controlling includes prohibiting the area of the inlet opening portion, through which exhaust gas flows into the turbine, from becoming a minimum when supercharging is performed using the motor of the supercharger.

A control apparatus for an internal combustion engine, comprising:

• a supercharger connected to an intake passage of the internal combustion engine and driven by a motor;
• a bypass passage which is provided for the intake passage in such a manner as to bypass the supercharger;
• a flow amount adjustment device which arbitrarily adjusts a flow amount of air flowing through the bypass passage by being driven electrically;
• an operational state detection portion which detects an operational state of the internal combustion engine, the operational state detection portion determines whether an amount of intake air flowing through the supercharger becomes equal to an amount of intake air flowing through the bypass passage;
• and
• a driving time decision portion which decides a time at which the flow amount adjustment device is driven, based on a result of detection performed by the operational state detection portion, the driving time decision portion starts to drive the flow amount adjustment device so as to close the bypass passage when the amount of intake air flowing through the supercharger becomes equal to the amount of intake air flowing through the bypass passage after supercharging by the supercharger is started.

A control apparatus for an internal combustion engine, comprising:

• a supercharger connected to an intake passage of the internal combustion engine and driven by a motor;
• a bypass passage which is provided for the intake passage in such a manner as to bypass the supercharger;
• a flow amount adjustment device which arbitrarily adjusts a flow amount of air flowing through the bypass passage by being driven electrically;
• an operational state detection portion which detects an operational state of the internal combustion engine;
• a driving time decision portion which decides a time at which the flow amount adjustment device is driven, based on a result of detection performed by the operational state detection portion.
• a variable geometry turbocharger which is provided on a downstream side of the supercharger connected to the intake passage;
• and
• a control portion which controls an area of an inlet opening portion through which exhaust gas flows into a turbine of the variable geometry turbocharger, wherein the control portion prohibits the area of the inlet opening portion, through which exhaust gas flows into the turbine, from becoming a minimum when supercharging is perform using the motor.