Method of controlling internal combustion engine

A method of controlling an internal combustion engine having

• a valve mechanism including an intake valve and an exhaust valve operatively associated with each cylinder of the internal combustion engine;
• a valve mechanism controller configured to control said valve mechanism;
• an operation condition detector for an operation condition detection of the internal combustion engine;
• and
• a throttle valve for controlling an intake amount in response to an operation amount of an acceleration pedal;
• comprising the steps of;
• controlling an opening degree of said throttle valve in response to said operation amount of said acceleration pedal when said operation condition detector judges a high load as the operation condition;
• and
• controlling each said intake valve to open each said intake valve by a predetermined timing after a bottom dead center during an intake process of a piston of the internal combustion engine in accordance with a control signal from said valve mechanism controller.

A method of controlling an internal combustion engine having

• a valve mechanism including an intake valve and an exhaust valve operatively associated with a cylinder of the internal combustion engine;
• a valve mechanism controller configured to control said valve mechanism;
• an operation condition detector for an operation condition detection of the internal combustion engine;
• and
• a throttle valve for controlling an intake amount in response to an operation amount of an acceleration pedal;
• comprising the steps of
• controlling said throttle valve to a high opening degree condition regardless of said operation amount of said acceleration pedal when said operation detector judges a low or middle load as the operative condition of the internal combustion engine;
• with respect to at least one of a valve closing timing and a valve lift amount of said intake valve;
• and
• injecting directly fuel into said respective cylinder after closing said intake valve.

A method of controlling an internal combustion engine having

• a valve mechanism including an intake valve and an exhaust valve operatively associated with a cylinder of the internal combustion engine;
• a valve mechanism controller configured to control said valve mechanism;
• an operation condition detector for an operation condition detection of the internal combustion engine;
• and
• a throttle valve for controlling an intake amount in response to an operation amount of an acceleration pedal;
• comprising the steps of controlling an opening degree of said throttle valve in response to said operation amount of said acceleration pedal when a high load of the operation condition of the internal combustion engine is judged;
• controlling said intake valve to open said intake valve by a predetermined timing after a bottom dead center during an intake process of a piston of the internal combustion engine in accordance with a control signal from said valve mechanism controller;
• and
• injecting directly fuel into said respective cylinder before closing said intake valve.

A control apparatus of an internal combustion engine, comprising

• an intake valve for opening and closing an intake port of a cylinder;
• an electromagnetic drive mechanism for driving electromagnetically said intake valve;
• a throttle valve for controlling an intake amount in response to an operation amount of an acceleration pedal;
• an electromagneto-actuator for electromagnetically driving said throttle valve;
• and
• an electronic control circuit for supplying a signal to said electromagnetic driving mechanism and said electromagneto-actuator in response to an operation condition of the internal combustion engine;
• such that
• during a low load operation condition and a middle load operation condition of the internal combustion engine, said electronic control circuit supplies a control signal for holding a predetermined high opening degree to said throttle valve, and further said electronic control supplies a control signal for controlling at least one of a valve closing timing and a valve lift amount of said intake valve to said electromagnetic driving mechanism in response to an operation condition of the internal combustion engine.

A control apparatus of an internal combustion engine, comprising

• an intake valve for opening and closing an intake port of each cylinder;
• an electromagnetic drive mechanism for driving electromagnetically said intake valve;
• and
• an electronic control circuit for supplying a signal to said electromagnetic driving mechanism in response to an operation condition of the internal combustion engine;
• such that
• at an operation area of a low load and a middle load of the internal combustion engine, said control circuit supplies a control signal for controlling at least one of a valve closing timing and a valve lift amount of said intake valve to said electromagnetic driving mechanism in response to an operation amount of an acceleration pedal.