Kubota Corporation

Naotaro Nagai

Shingo Matsunobu

Hiroki Oso

Hiroaki Isoshima

Akira Tamura

Kentaro Shiraishi

Yasushi Kobayashi

Kiichi Suehiro

Masanari Tennomi

An object of the present invention is to provide a fuel injection system capable of suppressing an occurrence of distortion in an injector during assembly of components. A fuel injection system () includes: a bracket () which is fixed to a cylinder head () of an engine (); a fuel accumulator () which is supported by and fixed to the bracket () and which accumulates pressure of fuel supplied from a fuel pump; and an injector () which is directly connected to the fuel accumulator () and mounted to the cylinder head () and which injects the fuel, supplied from the fuel accumulator (), into a combustion chamber. At least one of the fuel accumulator () and the bracket () has guide members () which guide the injector () to a mount position on the cylinder head ().

Fuel injection system

Provided is an injector control device which is capable of setting a preceding injection amount to a fuel injection amount that is less than a main injection amount, while suppressing situations where preceding injections executed prior to a main injection in multi-stage injection are eliminated. An injector control deviceincludes: an injection amount setting unitthat sets, as a total injection amount, a total of fuel injection amounts in multi-stage injection in a single cycle, and sets, as a preceding injection amount, a fuel injection amount in a preceding injection executed prior to a main injection in the multi-stage injection; an energization period setting unitthat sets an energization period of an injectorbased on the fuel injection amounts set by the injection amount setting unit; and an injector driving unitthat controls driving of the injectorbased on the energization period set by the energization period setting unit. The injection amount setting unitsets a fuel injection amount that is a predetermined percentage of the total injection amount as the preceding injection amount.

Injector control device

In an engine head cover, an upper portion of a partition plate, which partitions an inside of a head coverinto upper and lower portions, forms a blowby gas passage W having an inletand an outletcommunicating with an intake path. A PCV valvedisposed on the outletside, a filterdisposed on the inletside, and a labyrinthdisposed between the PCV valveand the filterare provided. A recovery holewhich causes a flowdown of trapped oil is formed at a portion on a downstream side of the filterin a flow direction of a blowby gas in the blowby gas passage W and on a lower side of the labyrinthand the pressure regulating valve

Engine head cover

Growing community of inventors

Sakai, Japan

Naotaro Nagai