Kubota Corporation

Hideya Miyazaki

Masahiro Aketa

Yuzo Umeda

Kiyoshi Hataura

Manabu Miyazaki

Shuichi Yamada

Osamu Takii

Atsushi Yamaguchi

Yuji Takemura

Hideo Hasegawa

Akinori Muraoka

A fuel injection device for a diesel engine adapted to perform a preliminary injection (1) and a main injection (2) to a combustion chamber (3), wherein the preliminary injection (1) is adjusted to begin within a valve overlap term (40). Within the valve overlap term (40), no intake air is introduced into the combustion chamber (3) or a little if any and the combustion chamber (3) contains a gas of high temperature. If the preliminary injection (1) is conducted into this gas of high temperature within the combustion chamber (3), a preliminary injection fuel vaporizes soon to thereby shorten the ignition lag of a main injection fuel with the result of improving the combustion.

Fuel injection device for diesel engine

In a divided combustion chamber for diesel engine, a main combustion chamber (2) communicates with a sub-chamber (5) through a communication hole (6), the communication hole (6) being composed of a main communication hole (7) and sub communication holes (8), a pair of sub communication holes (8),(8) being provided in the shape of grooves in opposite right and left peripheral surface portions of the main communication hole (7). Provided at boundaries between a peripheral surface of the main communication hole (7) and peripheral surfaces of the sub communications holes (8),(8) are auxiliary communication grooves (9),(9) smaller than the sub communication holes (8),(8) in width.

Divided combustion chamber for diesel engine

Growing community of inventors

Sakai, Japan

Hideya Miyazaki