Komatsu Corporation

Kabushiki Kaisha Komatsu Seisakusho

Godo Ozawa

Harushige Nishida

Toshihiko Nishiyama

Kozo Okuda

Tadashi Iijima

Jiro Akagi

Muneo Harada

Naoto Ikeda

Masaki Takahashi

Hidetada Fukushima

Masaki Shinohara

Akihumi Hukui

Noriaki Nakane

Hiroki Satow

An engine unit mounted to a vehicle frame, the engine unit includes: an engine; an engine support mechanism to be coupled to the vehicle frame, with at least one vibration absorbing mechanism disposed on each of both sides of the engine in an orthogonal direction to a crankshaft of the engine, to support the engine; an aftertreatment device to purify exhaust gas emitted from the engine; a base bracket provided to the engine support mechanism; and an upper bracket detachably fixed and mounted to the base bracket, the upper bracket supporting the aftertreatment device.

Engine support mechanism with aftertreatment device

An engine output controller provided in a bulldozer includes an output curve storage device storing a plurality of output curves of an engine and an output curve changing device selecting and shifting to one of the plurality of output curves. The output curve changing device, when a pressure of a blade tilt cylinder is equal to or more than a predetermined value, calls and shifts to a higher output curve from the output curve storage device. When an oil pressure is supplied to the tilt cylinder to tilt a blade and an operation is performed without reducing a soil pressing speed in this condition, the output curve changing device shifts the current output curve to the higher output curve to drive the engine. However, in many other cases, the output curve is automatically switched to a lower output curve to reduce an output of the engine. Thus, the fuel consumption is improved.

Engine output control via auto selection of engine output curve

Apparatus for controlling a mechanical supercharger for a diesel engine

Differential driving supercharger and method for controlling the same

Supercharging device for a vehicle engine and method for controlling the

Water pump for internal combustion engines

Fuel injection system for internal combustion engine

Variable compression ratio engine

A diesel engine piston, which exhibits high resistance to heat load, has a cooling cavity formed circumferentially around and outwardly of the outer periphery of a reentrant combustion chamber. A cooling liquid inlet passageway through which cooling liquid is supplied is provided in the piston body. The inside diameter of the cooling cavity is smaller adjacent to the top of the piston than adjacent to the bottom of the piston, and the cross-sectional area of the cooling cavity gradually increases from the bottom of the cooling cavity toward the top of the cooling cavity. A funnel wall, which projects downwardly toward the bottom of the piston, serves as the inlet of the cooling liquid inlet passageway. A distributing member, positioned within the cooling cavity directly above the outlet of the cooling liquid inlet passageway, splits the cooling liquid into two streams for passage in opposite directions through two segments of the cooling cavity.

Cooling structure of diesel engine piston

Method of cooling cylinder liners in an engine

Growing community of inventors

Utsunomiya, Japan

Godo Ozawa