fuel consumption, noise, NOx and PM emissions, Komatsu said. The engine also meets the next level of European and Japanese emissions requirements and will be used by Komatsu America Corp., the U.S. subsidiary of Komatsu Ltd., as well as by Komatsu Ltd. in Japan to serve its global construction and min- ing equipment customers. dp
rials such as diamond-like carbon, Komatsu said. By using cooled EGR with the en- gines, Komatsu said it has increased capacity to further reduce NOx to Tier 4 levels. The system incorporates a larger-volume EGR cooler to ensure more stable performance during the demanding work conditions the en- gines will face in the equipment it will be equipped in. The engines are also mated with a Komatsu-designed and -developed high-efficiency diesel particulate filter engineered to capture more than 90% of PM. Passive and active regeneration is initiated automatically by the engine controller as needed to burn particulates while the engine is running to allow uninterrupted ma- chine operation during regeneration of the filter. A special oxidation cata- lyst with a fuel injection system elimi- nates the need for a traditional fuel burner, thereby reducing mainte- nance costs and increasing reliability, Komatsu said. The combustion chamber in the piston crown has also been re- designed and harmonized to the engine and machine interface with a new electronic control system. The piston bowl has a new shape de- signed to improve combustion and
The engines will also be equipped with a Komatsu-designed and -developed high- efficiency diesel particulate filter. The engine uses passive and active regenera- tion, initiated automatically by the engine controller as needed to burn particulates while the engine is running to allow unin- terrupted machine operation during regen- eration of the filter.
June 2010 DIESEL PROGRESS NORTH AMERICAN EDI TION 97