Kubota Corporation

Yutaka Ishigaki

Takahiro Yamazaki

Hiroki Kuwayama

Yoshinori Tanaka

Hideyuki Koyama

Manabu Miyazaki

Satoshi Fujii

Keita Naito

Katsunori Ikemachi

Hidetaka Morinaga

Hozumi Ishida

Tadasi Nakano

A subchamber type combustion chamber for a diesel engine, which reduces fuel consumption rate and combustion noise. To achieve the object, a subchamber type combustion chamber is communicated with a main combustion chamber through a nozzle hole, a fuel injection nozzle faces into the subchamber, and a glow plug extends into the subchamber. A heat generating portion of the glow plug includes a rod-shaped portion and a projecting portion projecting from an end of the rod-shaped portion. The projecting portion is provided with a convex curved surface projecting from a circular peripheral edge at the end of the rod-shaped portion while the convex curved surface is reduced in diameter. The percentage of value P/D obtained by dividing projection dimension P of the projecting portion from the end of the rod-shaped portion by diameter dimension D at the end of the rod-shaped portion is 3% to 23%.

Subchamber type combustion chamber for diesel engine

An engine in which an oil consumption and a leakage of blow-by gas can be stably reduced for a long period of time. The engine includes a first land (), a first ring groove (), a second land (), a second ring groove (), a third land (), a third ring groove (), and a piston skirt () formed on a piston peripheral wall () in the above-recited order from a side of a piston head (). A first pressure ring () is fitted in the first ring groove (). A second pressure ring () is fitted in the second ring groove (), an oil ring () fitted in the third ring groove (), and an indentation () is formed at the second land ().

Engine

An apparatus for adjusting the fuel amount of a diesel engine is capable of preventing a decrease in the accuracy of the adjustment of the fuel amount. An engine stop operation input portionis installed in the sliderand an engine stop operation output portionis opposite to the engine stop operation input portion. When an engine stop operation is performed, engine stop operation forceis inputted from the engine stop operation output portionto the engine stop operation input portionand the sliderslides in the direction of the decrease in the fuel amount with the governor leverremained intact so that the engine is stopped. A virtual lineis assumed to pass through a central portion of the biasing springwhen seen from a direction parallel to the adjustment amount rack pin

Apparatus for adjusting fuel amount of diesel engine

Growing community of inventors

Sakai, Japan

Yutaka Ishigaki