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Komatsu's Environmental and Social Activities Enhancing Quality of Life


Mitigating Climate Change  Developing the Latest Engine Technology

New emission control regulations for construction machinery in Japan, the United States and Europe are stringent, requiring the reduction of NOx and PM emissions to 1/10 of previous levels. In order to afford regulated entities sufficient time to develop new technology to comply with the more stringent standards, the regulatory agencies in Japan, the United States and Europe coordinated to implement changes in two stages.

The first stage of regulations went into effect in 2011. To comply with these regulations, Komatsu developed and produced the Komatsu Diesel Particulate Filter (KDPF), which is an emission aftertreatment device designed to reduce PM emissions to 1/10 of pre-2011 levels. The second stage of regulations will begin in 2014 and require reductions in NOx to 1/10 of pre-2011 levels.

Typically lowering combustion temperature to reduce NOx emissions leads to increased PM emissions and fuel consumption. Construction machinery engines, NOx and PM must be reduced simultaneously and also reduce fuel consumption. Also, construction machinery engines that are used in harsh environments need to perform at maximum output/torque with high reliability and durability.

To respond to these needs, Komatsu developed and produced a urea NOx reduction aftertreatment device designed primarily for construction machinery. The device uses a unique catalyst with structure, functions and controls tailored to the unique characteristics of construction machinery. Komatsu will gradually introduce into the market products that are compliant with the 2014 regulations.

Also, to comply with the 2014 regulations, we leveraged our in-house development and production expertise for engines, hydraulic machines, control systems and the main unit to design the engine and body as a total package in order to produce engines that can be maximally effective under a variety of conditions. Komatsu's unique expertise in engine technology combined with the latest technology make it possible to reduce environmental burdens while being economical.

- Including some joint products with Cummins Inc.

New engine compliant with the next phase of emission controls in Japan, the United States and Europe

New engine compliant with the next phase of emission controls in Japan, the United States and Europe

Exhaust postprocessing system

Exhaust postprocessing system