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Komat'su are committed to finding environmentally friendly solutions that satisfy all of our customers. As part of these efforts, we actively pursue technological innovations that reduce diesel emissions and minimize fuel requirements.

Clean, Environmentally Friendly Engine

(1) Technology to control emissions from diesel engines for use in portable generators, construction and industrial equipment

Using cast iron pistons and an electronically controlled, high-pressure fuel injection system, Komatsu has developed an ideal method of fuel combustion. We have also developed a variety of measures-such as integrating air-to-air aftercoolers into our engines-to meet the stringent Tier II emission regulations in the United States, which took effect in 2001.

(2) Controlling Emissions in Stationary Generators

The water emulsified system has revolutionized diesel engines by enabling considerable reductions in NOx and by virtually eliminating exhaust smoke, without necessitating a cumbersome processing unit. Diesel generators can now be used in metropolitan centers, because they conform to standards that were previously impossible to meet.

Durability and Reliability

Komatsu engines for generator use have extended the time between overhauls (TBO) to an outstanding 16,000 hours.

(1) FCD Pistons
Our high-speed diesel engines were the first to incorporate ductile cast iron FCD pistons. The material is not only stronger, but also offers greater durability and resistance to high temperatures than do ordinary aluminum pistons.

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2) Cylinder Liners
To increase the wear resistance of cylinder liners, we have developed a Tufftride treatment that, in addition to our special honing method, increases lubricity and significantly enhances surface durability.

(3) Roller Tappets
Roller tappet system increases durability by reducing friction between tappets and cams; this is the first class of engine to employ them. The roller tappet system has higher reliability compared to conventional tappet & cam type.