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| Komatsu's Tier 4 diesel engine technology  Komatsu America Corp. announced the introduction of its new diesel engine that features the next generation of engine technology designed to meet US EPA non-road Tier 4 interim emission regulations. Based on Komatsu proprietary technologies developed over many years, the new diesel engine reduces exhaust gas particulate matter (PM) by more than 90% and oxides of nitrogen (NOx) by more than 45%-when compared to current Tier 3 levels-while still consuming less fuel. Komatsu's Tier 4 engine technology includes: • Newly designed variable geometry turbocharger • Newly designed DPF (diesel particulate filter) • Heavy duty HPCR (high-pressure common rail) fuel injection system • Larger more robust cooled EGR (exhaust gas recirculation) system • Redesigned combustion chamber at top of piston • Harmonized engine and machine interface by electronic control system Komatsu has integrated this Tier 4 technology into construction and mining engines ranging in size from 3.3- to 46-liter. Through Komatsu's in-house development and production of engines, hydraulic units, control systems and major components, the company has attained exceptional machine performance under a variety of operating conditions. Komatsu customers have come to expect outstanding quality and performance, and these Tier 4 powered machines are designed to meet customer expectations while improving the environment and fuel consumption. write your comments about the article :: © 2010 Construction News :: home page |