Komatsu Ltd has developed new engine technologies designed to comply with new emission regulations in Japan, North America and Europe effective 2014, and is going to start commercial production in January 2014.

Emission regulations for diesel engines for use in construction equipment, announced in 2004, require a challenging reduction of NOx(nitrogen oxides) and PM (particulate matter) emissions to one tenth of, or below the preceding regulations1 and specifies enforcement in two phases, 2011 and 2014. Emission regulations, enforced since 2011, have required the reduction of PM emissions to one tenth of the preceding regulations. In response, Komatsu has developed and adopted the next-generation high-pressure common rail fuel injection (HPCR) system, high-efficiency exhaust gas recirculation (EGR) system, variable geometry turbocharger (VGT) system and diesel particulate filter (DPF), which have been well received on the market. New regulations effective in 2014 require the reduction of NOx emissions to one tenth or below from the preceding regulations. In addition to refining the above technologies, Komatsu has developed a new selective catalytic reduction (SCR) device in-house.

From displacement of 3.3 to 46 liters, respectively, for small construction equipment to large mining equipment, Komatsu has been consistently2 engaging in research, development, and manufacture of diesel engines over the years. With respect to construction and mining equipment on which new engines will be mounted, Komatsu will also continue to take advantage of in-house development and manufacturing capabilities for other key components, such as hydraulic devices and control systems, in order to achieve both reduction of environmental impact and improvement of fuel economy at the same time.

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