DIRECT FUEL INJECTION TYPE SPARK IGNITION ENGINE

Japanese Patent JP3721879

B2

PROBLEM TO BE SOLVED: To realize stable stratified combustion driving even at the time of idling when a tumbling current weakens.
SOLUTION: A combustion chamber 2 recessively provided on a piston is constituted of a bottom surface 28 a cross-section along a flat surface toward the exhaust side from the suction side of which makes a curved shape approximate to a circular arc of a radius of curvature R and a pair of side surfaces, and an upper surface opening shape makes a roughly rectangular shape. An angle which a circular arc contact surface at a collision point 33 at a piston position at the time when a spray lower end part (f) reaches the bottom surface 28 at a spraying period at the time of low rotation makes against a horizontal surface is set to that an angle a becomes less than 1/2 of an angle θ made by the spray lower part (f) and the horizontal surface. Consequently, even when the spray period comes to be at the delay angle side, the lower end part (f) of fuel spray is reflected upward above the horizontal surface without fail, and even when gas flow is weak, the fuel spray is collected in the neighbourhood of an ignition plug 7, and stable stratified combustion is possible.

JP2015096727	METHOD OF ACTUATING INTERNAL COMBUSTION ENGINE AND INTERNAL COMBUSTION ENGINE
JP2917713	INDUSTRIAL APPLICABILITY: In-cylinder injection type internal combustion engine

Yuichi Iriya
Koichi Yamaguchi
Takashi Fukuda

JP24248499A

November 30, 2005

August 30, 1999

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Nissan Motor Co., Ltd

F02B23/10; F02F1/42; F02F3/26; F02B75/12; F02F1/24; (IPC1-7): F02B23/10; F02F3/26

JP11200866A
JP11182249A
JP11050847A
JP10339219A
JP10331642A
JP10317974A

Tsuyoshi Hashimoto
Hiromichi Kobayashi
Tomioka Kiyoshi

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