Kubota Corporation

Mitsugu Okuda

Takashi Onishi

Hiroki Oso

Toshio Nakahira

Yoshikazu Takemoto

Kozo Yoshida

Yuichi Tamaki

Tomoya Akitomo

Yusuke Suzuki

Hiroshi Manabe

Hideyuki Koyama

Wataru Iwanaga

Manabu Miyazaki

Akira Tamura

Yasushi Kobayashi

Takahiro Kajihara

Keita Naito

Shingo Matsunobu

Mitsuru Kamiyama

Masahiro Nagahama

Katsuaki Arai

Hidetaka Morinaga

Naoya Sakurai

Hozumi Ishida

Kensuke Fujita

Takumi Fukuda

Yoshihiko Kawamoto

Hiroshi Sasaki

Yuji Shinohara

Nobuyuki Kobayashi

To provide an engine head structure for 'omission or shortening a fuel pipe that withstands a high pressure', 'simplification or omission of a support bracket for a fuel accumulator and/or a fuel injection device', &#x201c;reduction of the number of parts&#x201d; by devising a fuel accumulator and a support structure therefor, and the like. An engine head structure has a support bracket for mounting a fuel accumulator including a joining portion with a fuel injection device on a cylinder head, is disposed on a side of the fuel injection device or between adjacent fuel injection devices. The support bracket includes a member having a mounting portion on which the fuel accumulator is placed and mounted, a mounting leg portion extending from the mounting portion and mounted on the cylinder head, and an aligning leg portion extending from the mounting portion for positioning the support bracket with respect to the cylinder head.

Engine head structure

An electronic fuel injection type diesel engine enables reduction in engine size. The electronic fuel injection type diesel engine is provided with: a combustion chamber inside a cylinder; a fuel injection chamber inside a cylinder head; a fuel injector that injects liquid fuel into the fuel injection chamber; a fuel accumulation unit that accumulates the liquid fuel injected from the fuel injector; and an electronic control unit that controls a timing and an amount of injection of the liquid fuel.

Electronic fuel injection type diesel engine

A device with an adjustment bolt includes a bolt attachment wall, an adjustment bolt screwed with an internal thread hole of the bolt attachment wall, a locknut screwed with the adjustment bolt, a cover that surrounds the adjustment bolt and the locknut, and a stopper unit that prevents removal of the cover from the locknut. The stopper unit includes an inner circumference groove of the cover fitted around a C-shaped retaining ring, and an external circumference groove of the locknut fitting within the retaining ring. The external circumference groove includes a first groove portion having a large-diameter groove bottom that restricts contraction and removal of the retaining ring fitted within the inner circumference groove, and a second groove portion provided continuously for the first groove portion and having a small-diameter groove bottom that allows contraction and removal of the retaining ring fitted within the inner circumference groove.

Device with adjustment bolt

It is an object of the present invention to provide an exhaust gas treatment device of an engine capable of preventing matching surfaces of catalyst portions configuring a combustible gas catalyst from being thermally damaged. In the exhaust gas treatment device, combustible gas is produced by combustible gas generating catalyst, exhaust gas heated by combustion of combustible gas is supplied to an exhaust gas treatment portion, the combustible gas generating catalyst comprises an aggregate of a plurality of catalyst portions, each of the catalyst portions includes a matching surface with respect to adjacent one of the catalyst portions, a fastening ring is fitted over the combustible gas generating catalyst in which the matching surfaces of the adjacent catalyst portions are abutted against each other, and the matching surfaces of the adjacent catalyst portions are brought into tight contact with each other by a fastening force of the fastening ring.

Exhaust gas treatment device of engine

An exhaust treatment device of a diesel engine is provided in which combustible gas is burned with oxygen in exhaust, combustion heat increases a temperature of the exhaust, and heat of the exhaust can burn and remove PM accumulating in a DPF. In order to cause a heater for radiating heat at a start of generation of the combustible gas to enter a catalyst inlet portion, and fit a liquid fuel retaining member over a periphery of the heater, a guide plate is provided to a lower face of the liquid fuel retaining member so that the air-fuel mixture moving down in the liquid fuel retaining member flows along an upper face of the guide plate out to a periphery of the guide plate.

Exhaust treatment device of diesel engine

An exhaust treatment apparatus for an engine including a combustible gas supplying passage; a heat releasing port opened in an upstream side in the exhaust passage from the oxidation catalyst and in a downstream side in the combustible gas supplying passage, the exhaust passage and the combustible gas supplying passage communicating with each other through the heat releasing port; an ignition apparatus beneath the heat releasing port, the heat of flaming combustion of combustible gas ignited by the ignition apparatus being supplied to the exhaust passage to raise the temperature of exhaust in the exhaust passage; a flame holding plate in a downstream side in the combustible gas supplying passage from the ignition apparatus, an exhaust guiding plate at the top portion of the flame holding plate, the exhaust guiding plate having an upward slope toward a downstream side in the exhaust passage.

Exhaust treatment apparatus for engine

An engine with an exhaust treatment device () wherein a rotation moment of a side support stay () is generated by a load of a side portion () received by side support stay fastening tool () via an edge portion () of a cutout groove (). As a result, a load of the side portion () of the exhaust treatment device () can be supported by the side support stay (). A one-side temporary mount portions () is provided in a one-side support stay (). The one-side support stay () can be temporarily mounted on the one-side temporary mount portions ().

Engine with exhaust treatment device and attachment method for exhaust treatment device

An exhaust gas treatment device for a diesel engine is capable of smoothly starting the generation of a combustible gas and is provided with a small combustible gas generator. A core material is fitted in the center portion of an annular wall to form an air-fuel mixing chamber between the inner peripheral surface of the annular wall and the outer peripheral surface of the core material. An air-fuel mixture gas in the air-fuel mixing chamber is adapted to be supplied from the end of the air-fuel mixing chamber to a combustible gas generating catalyst to a portion near the center thereof. A heater is used as the core material, the heat dissipating outer peripheral surface of the heater is exposed to the air-fuel mixing chamber. Heat is dissipated directly from the heat dissipating outer peripheral surface of the heater to the air-fuel mixing chamber when starting the generation of the combustible gas.

Exhaust gas treatment device for diesel engine

Internal combustion engine

The blow-by gas that has flowed from a front-stage breather-chamber inlet () into a front-stage breather chamber () floats up around a preliminary valve-seat peripheral wall () and a preliminary breather-passage peripheral wall () and flows from a breather-chamber inlet () into a breather chamber (). When a breather-chamber peripheral wall () is removed from a breather-chamber attaching seat (), a diaphragm valve () is attached to the breather-chamber attaching seat () and has a valve face () seated on a preliminary valve seat (), and a plug () is taken out of a preliminary breather outlet (), from which a breather pipe () is led out, thereby enabling the front-stage breather chamber () to be used for a single-stage breather chamber provided with the diaphragm valve ().

Breather device for an engine

An engine comprises a crank case () provided with a lower opening portion (), which is covered with an oil pan () from below, and with a pair of left and right oil passages which extends in a front and rear direction along left and right lateral walls () and (). In this engine, the crank case () has the left and right lateral walls () and () provided with left and right ribs () and () extending in the front and rear direction. These left and right ribs () and () are raised inwards from the left and right lateral walls () and () of the crank case (). In order to provide left and right oil passages () and () in these left and right ribs () and (), these ribs () and () are positioned at the lower opening portion () of the crank case ().

Engine

Growing community of inventors

Sakai, Japan

Mitsugu Okuda