Patent ID: 6386177
Filing Date: 2002-05-14
Classification: F02B,F02D,F02M,Y02T

Abstract:
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 adjusting 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, wherein said intake means and exhaust means being closed to retain exhaust gas within said cylinder during said exhaust gas retaining phase, said control unit providing 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 a portion of total fuel quantity and the remainder of said total fuel quantity, said control unit 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 said fuel injector at said first start time to control fuel quantity injected for said first fuel injection, said control unit determining a second fuel injection control signal indicative of the remainder of said 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, said remainder of said total fuel quantity being proportional to the engine load of the internal combustion engine.