Komatsu Corporation

Hiroki Sato

Jiro Akagi

Toshihiko Nishiyama

Tatsushi Itoh

Shouhei Nagasaka

Issei Hara

Yuuki Kasaoka

Norifumi Abe

Koichi Okaya

Yosuke Obuchi

An exhaust gas emission control system includes a cylindrical inflow body and an inflow pipe into which exhaust gas flows. The exhaust gas emission control system also includes a cylindrical outflow body and an outflow pipe from which the exhaust gas flows. The inflow pipe is provided with a louver member that covers an opening of the inflow body near an upstream side of an exhaust gas flow direction. The louver member is provided with slits and inclined plates capable of changing a flow direction of the exhaust gas passing through the slits into a desired direction.

Exhaust gas purification device

To provide an exhaust emission control device of an internal combustion engine able to well atomize a reducing agent and ensure supply of combustion air. Since a controller of the exhaust emission control device also controls a nozzle opening degree of a variable geometry turbocharger for purpose of spraying a urea water, even in the state where the engine works in a low load range of Tto Twhere supercharging pressure normally can not be increased, supercharging pressure P suitable to atomization of the urea water can be obtained by controlling the nozzle opening degree of the variable geometry turbocharger to be closer to a closing side compared to the conventional art (shown by the chain double-dashed line), while the urea water can be securely atomized by a part of the supercharged air. Further, by increasing the supercharging pressure up to the value P, combustion air supplied to the engine is increased, therefore favorable combustion can be realized, and generation of particulates and exhaust of unburned fuel can be reduced.

Exhaust emission control device of internal combustion engine

The present invention provides a wide range injection timing, small dispersion, good response and simple structure. In order to obtain this, in a fuel injection device for a diesel engine comprising a cylindrical body ( ), an upper plunger ( ) inserted thereto and capable of sliding in a vertical direction in response to a cam, an intermediate plunger forming a pressure chamber ( ) with respect to the upper plunger, a lower plunger ( ) brought into contact with the intermediate plunger, and an injection chamber ( ) provided in a lower end portion of the body plunger, in which a fuel in the injection chamber is injected by the lower plunger being subject to a force from the upper plunger, the improvement comprises a passage, having a large cross-sectional area, formed in the body for supplying a pressurized oil to the pressure chamber, the intermediate plunger ( ) being vertically movable in response to an oil pressure so as to make it possible to change a volume of the pressure chamber, and a timing spring ( ) having an end being brought into via contact with the intermediate plunger and the other end being brought into contact with the lower plunger and vertically moving the intermediate plunger in response to the pressure.

Fuel injection device for diesel engine

Method of controlling fuel injection apparatus for internal combustion

Growing community of inventors

Oyama, Japan

Hiroki Sato