System and method for auto-ignition of gasoline internal combustion engine

A system for an auto-ignition of gasoline internal combustion engine comprising:

• a cylinder;
• a piston disposed within said cylinder for reciprocating motion to define a combustion chamber;
• intake means for admitting fresh air into said cylinder;
• a fuel injector directly communicating with said combustion chamber;
• exhaust means for discharging exhaust gas resulting from combustion within said cylinder;
• and
• a control unit selecting one of a gasoline reform auto-ignition combustion mode and an auto-ignition combustion mode in response to magnitude of an operating parameter indicative of one of the engine load and the engine speed of the internal combustion engine,
• said control unit being operative during selection of said gasoline reform auto-ignition combustion mode to adjust opening and closing timings of said intake means and opening and closing timings of said exhaust means such that said piston reciprocates within said cylinder to perform an exhaust phase, an exhaust gas retaining phase, an intake phase, a compression phase, and an expansion phase,
• said control unit being operative during selection of said gasoline reform auto-ignition combustion mode to provide a first start time of a first fuel injection by said fuel injector during said exhaust gas retaining phase and a second start time of a second fuel injection by said fuel injector during said compression phase,
• said control unit determining total fuel quantity to be injected in response to engine load of the internal combustion engine,
• said control unit being operative during selection of said gasoline reform auto-ignition combustion mode to determine a portion of and the remainder of said determined total fuel quantity,
• said control unit being operative during selection of said gasoline reform auto-ignition combustion mode to determine a first fuel injection control signal indicative of said portion of said determined total fuel quantity and applying said first fuel injection control signal to said fuel injector at said first start time to control fuel quantity injected for said first fuel injection,
• said control unit being operative during selection of said gasoline reform auto-ignition combustion mode to determine a second fuel injection control signal indicative of the remainder of said determined total fuel quantity and applying said second fuel injection control signal at said second start time to control fuel quantity injected for said second fuel injection.

A computer readable storage device having stored therein data representing instructions executable by a computer to implement an auto-ignition of gasoline internal combustion engine, the engine having a piston disposed in a cylinder for reciprocating motion to define a combustion chamber, intake means for admitting fresh air into the cylinder, a fuel injector directly communicating with the combustion chamber, and exhaust means for discharging exhaust gas resulting from combustion within the cylinder, wherein opening and closing timings of the intake means and opening and closing timings of the exhaust means are adjustable, the computer readable storage device comprising:

• instructions for adjusting opening and closing timings of the intake means and opening and closing timings of the exhaust means such that the piston reciprocates within the cylinder to perform an exhaust phase, an exhaust gas retaining phase, an intake phase, a compression phase, and an expansion phase;
• instructions for providing a first start time of a first fuel injection by the fuel injector during said exhaust gas retaining phase and a second start time of a second fuel injection by the fuel injector during said compression phase;
• instructions for determining a portion of total fuel quantity and the remainder of said total fuel quantity;
• instructions for determining a first fuel injection control signal indicative of said portion of said total fuel quantity and applying said first fuel injection control signal to the fuel injector at said first start time to control fuel quantity injected for said first fuel injection;
• and
• instructions for determining a second fuel injection control signal indicative of the remainder of said total fuel quantity and applying said second fuel injection control signal to the fuel injector at said second start time to control fuel quantity injected for said second fuel injection.

A computer readable storage device having stored therein data representing instructions executable by a computer to implement an auto-ignition of gasoline internal combustion engine, the engine having a piston disposed in a cylinder for reciprocating motion to define a combustion chamber, intake means for admitting fresh air into the cylinder, a fuel injector directly communicating with the combustion chamber, and exhaust means for discharging exhaust gas resulting from combustion within the cylinder, wherein opening and closing timings of the intake means and opening and closing timings of the exhaust means are adjustable, the computer readable storage device comprising:

• instructions for selecting one of a gasoline reform auto-ignition combustion mode and an auto-ignition combustion mode in response to magnitude of an operating parameter indicative of one of the engine load and the engine speed of the internal combustion engine;
• instructions for adjusting, during selection of said gasoline reform auto-ignition combustion mode, opening and closing timings of the intake means and opening and closing timings of the exhaust means such that the piston reciprocates within the cylinder to perform an exhaust phase, an exhaust gas retaining phase, an intake phase, a compression phase, and an expansion phase;
• instructions for providing, during selection of said gasoline reform auto-ignition combustion mode, a first start time of a first fuel injection by the fuel injector during said exhaust gas retaining phase and a second start time of a second fuel injection by the fuel injector during said compression phase;
• instructions for determining total fuel quantity to be injected in response to engine load of the internal combustion engine;
• instructions for determining, during selection of said gasoline reform auto-ignition combustion mode, a portion of and the remainder of said determined total fuel quantity;
• instructions for determining, during selection of said gasoline reform auto-ignition combustion mode, a first fuel injection control signal indicative of said portion of said determined total fuel quantity and applying said first fuel injection control signal to the fuel injector at said first start time to control fuel quantity injected for said first fuel injection;
• and
• instructions for determining, during selection of said gasoline reform auto-ignition combustion mode, a second fuel injection control signal indicative of the remainder of said determined total fuel quantity and applying said second fuel injection control signal to the fuel injector at said second start time to control fuel quantity injected for said second fuel injection.

A method for an auto-ignition of gasoline internal combustion engine, the engine having a piston disposed in a cylinder for reciprocating motion to define a combustion chamber, intake means for admitting fresh air into the cylinder, a fuel injector directly communicating with the combustion chamber, and exhaust means for discharging exhaust gas resulting from combustion within the cylinder, wherein opening and closing timings of the intake means and opening and closing timings of the exhaust means are adjustable, the method comprising:

• adjusting opening and closing timings of the intake means and opening and closing timings of the exhaust means such that the piston reciprocates within the cylinder to perform an exhaust phase, an exhaust gas retaining phase, an intake phase, a compression phase, and an expansion phase;
• providing a first start time of a first fuel injection by the fuel injector during said exhaust gas retaining phase and a second start time of a second fuel injection by the fuel injector during said compression phase;
• determining a portion of total fuel quantity and the remainder of said total fuel quantity;
• determining a first fuel injection control signal indicative of said portion of said total fuel quantity;
• determining a second fuel injection control signal indicative of the remainder of said total fuel quantity;
• applying said first fuel injection control signal to the fuel injector at said first start time to control fuel quantity injected for said first fuel injection;
• and
• applying said second fuel injection control signal at said second start time to control fuel quantity injected for said second fuel injection.

A method for an auto-ignition of gasoline internal combustion engine, the engine having a piston disposed in a cylinder for reciprocating motion to define a combustion chamber, intake means for admitting fresh air into the cylinder, a fuel injector directly communicating with the combustion chamber, and exhaust means for discharging exhaust gas resulting from combustion within the cylinder, wherein opening and closing timings of the intake means and opening and closing timings of the exhaust means are adjustable, the method comprising:

• selecting one of a gasoline reform auto-ignition combustion mode and an auto-ignition combustion mode in response to magnitude of an operating parameter indicative of one of the engine load and the engine speed of the internal combustion engine;
• adjusting, during selection of said gasoline reform auto-ignition combustion mode, opening and closing timings of the intake means and opening and closing timings of the exhaust means such that the piston reciprocates within the cylinder to perform an exhaust phase, an exhaust gas retaining phase, an intake phase, a compression phase, and an expansion phase;
• providing, during selection of said gasoline reform auto-ignition combustion mode, a first start time of a first fuel injection by the fuel injector during said exhaust gas retaining phase and a second start time of a second fuel injection by the fuel injector during said compression phase;
• determining total fuel quantity to be injected in response to the engine load of the internal combustion engine;
• determining, during selection of said gasoline reform auto-ignition combustion mode, a portion of and the remainder of said determined total fuel quantity;
• determining, during selection of said gasoline reform auto-ignition combustion mode, a first fuel injection control signal indicative of said portion of said determined total fuel quantity;
• determining, during selection of said gasoline reform auto-ignition combustion mode, a second fuel injection control signal indicative of the remainder of said determined total fuel quantity;
• applying said first fuel injection control signal to the fuel injector at said first start time to control fuel quantity injected for said first fuel injection;
• and
• applying said second fuel injection control signal to the fuel injector at said second start time to control fuel quantity injected for said second fuel injection.