Kubota Corporation

Mutsumi Murata

Yasushi Nakamura

Kiyoshi Hataura

Manabu Miyazaki

Osamu Takii

Mitsuru Kamiyama

Hiroshi Mikumo

Toshinori Okajima

Yuzo Umeda

Masahiro Nagahama

Yasunori Shiraishi

Setsuo Yamada

Kazuyoshi Morioka

Toshinori Oyajima

A multi-cylinder engine wherein a direction in which a crank shaft spans is a front and rear direction and a widthwise direction of a cylinder head () perpendicular to the front and rear direction is a lateral direction, the multi-cylinder engine comprising the cylinder head () which has one lateral side to which an intake-air distributing passage wall () and has the other lateral side to which an exhaust-gas converging passage wall (), a common rail () being arranged around the cylinder head (). In this multi-cylinder engine, the common rail () is arranged immediately lateral of the intake-air distributing passage wall (), thereby positioning the intake-air distributing passage wall () between the cylinder head () and the common rail (). Preferably, an intake-air inlet pipe () is made to stand up at an upper portion of the intake-air distributing passage wall () and is provided with an intake-air flange portion (), which is positioned just above the common rail ().

Multi-cylinder engine

A multi-cylinder engine wherein a direction in which a crank shaft spans is a front and rear direction and a widthwise direction of a cylinder head () perpendicular to the front and rear direction is a lateral direction, the multi-cylinder engine comprising the cylinder head () which has one lateral side to which an intake-air distributing passage wall () is attached and has the other lateral side to which an exhaust-gas converging passage wall () is attached, an EGR cooler being interposed between an exhaust-gas converging passage and an intake-air distributing passage. In this multi-cylinder engine, the EGR cooler () spans in the front and rear direction laterally of a cylinder block () and the exhaust-gas converging passage wall () is positioned just above the EGR cooler (). Preferably, an EGR gas lead-out pipeconducted out of the EGR cooler () is arranged rearwards of an engine cooling fan () so that the engine cooling air produced by the engine cooling fan () might blow against the EGR gas lead-out pipe ().

In a governor device of a diesel engine, a control rack of a fuel injection pump is adapted to be controllably actuated by a balance between a governor spring and an engine revolution speed responsive means. A speed control member is adapted to be manipulated for adjusting a tension force of the governor spring. A fuel limiting actuation member serves to prevent an excessive fuel flow from being injected when the speed control member is manipulated for a quick acceleration. A quick acceleration state detecting means serves to detect a quickly accelerated state of the engine so as to selectively change over the fuel limiting actuation member to a fuel limiting position and to a fuel limitation cancelling position depending on the lapse of time.

Governor device of diesel engine

Growing community of inventors

Sakai, Japan

Mutsumi Murata