GASOLINE SELF-IGNITING INTERNAL COMBUSTION ENGINE

Japanese Patent JP2000204990

A

To smoothly perform the switching to spark ignition while suppressing the occurrence of knocking by providing an injection device having a variable valve gear mechanism and capable of injecting water at high load in a self- igniting operation area.

In a four-cycle spark ignition gasoline engine, a fuel injection valve 2 and a water injection valve 1 downstream thereof are mounted on an intake port 5. Fuel and water are supplied from a fuel tank 11 and a water tank 12 to the respective injection valves 1, 2 by exclusive pumps 17, 22, respectively. The injection quantity and injection timing of each injection valve 1, 2 are controlled by an engine control module 13. The quantity and execution or not of water injection are controlled according to operating condition (steady time and transitional time), whereby a homogeneous premix compression ignition and combustion with high efficiency and low NOx discharge can be realized in a wide load range of the engine. The switching with spark ignition can be smoothly performed while suppressing the occurrence of knocking.

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ARAI TAKAYUKI
TANIYAMA TAKESHI
YOSHIZAWA YUKIHIRO
IIYAMA AKIHIRO

JP596299A

July 25, 2000

January 13, 1999

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NISSAN MOTOR

F02B11/00; F02B1/12; F02B47/02; F02D15/00; F02D19/12; F02D45/00; F02M25/022; F02B1/04; F02B75/02; (IPC1-7): F02D19/12; F02B11/00; F02B47/02; F02D15/00; F02D45/00; F02M25/022

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