The New 4.6 l Diesel Engine for the Off-Road Machinery

Authors

Masataka Uchibori, Dr. Hiroshi Omote, Ryo Yuki, Yuji Kawabata, Masahiro Koura, Hiroyasu Nishikawa, Takayuki Onodera, Yanmar Power Technology Co., Ltd., Osaka, Japan;
Dr. Ludger Ruhkamp, Michael Neitz, Volker Scholtz, FEV Europe GmbH, Aachen, Germany

Summary

Yanmar has developed the new 4.6 L diesel engine 4TN107 that covers up to 155 kW while meeting EU Stage V emission regulations for the off-road machinery. 
This engine which has compact Diesel Particulate Filter (DPF) and Selective Catalytic Reduction (SCR) device along with two-stage turbocharging achieves class-leading low fuel consumption. Also combustion technology specialized for industrial use with common rail injection system, cooled exhaust gas re-circulation and cutting-edge components lead to life cycle cost reduction with optimized urea consumption. The new combustion chamber was developed and leading-edge components of fuel injection system and friction reduction are adopted for low fuel consumption in a wide range. This engine also achieves class-leading power density of 34 kW/L with the above technology. Cylinder head and cylinder block were designed with high rigidity and cooling water channels are optimized for high reliability to realize the high power density. 
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