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Top 100: Varied Tier-3 Technology

At the heart of Komatsu 's Tier-3 technology for off-highway diesel engines is a patented combustion-chamber design...

December 01, 2005

Komatsu 's Tier-3At the heart of Komatsu 's Tier-3 technology for off-highway diesel engines is a patented combustion-chamber design, which works in concert with the company's high-pressure common-rail fuel system and an enhanced electronic control system that provides increased processing speed and increased inputs. Also, for its smaller Tier-3 "ecot3" engines, Komatsu uses improved charge-air coolers and enhanced-performance turbochargers. In addition, Komatsu's larger ecot3 engines employ a cooled exhaust-gas recirculation system (EGR), which is specially designed for the rigors of off-highway application, says the company.

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