Vol. 54 No. 1 (2017)   M-FET
Technical Papers

Development of EPA Tier 4 Certified Diesel Engines for 2-3t Forklift Trucks

TAKAYUKI YAMAMOTO
KENJI HIRAOKA
SHINYA IRIGUCHI
YOSHIHISA MATSUMARU
HIROKI NAKANO
HIROYUKI ITO

For 2 to 3-ton class forklift trucks, Mitsubishi Heavy Industries, Ltd. (MHI) has developed the D04EG engine, which is in compliance with both the Japanese 2014 emission standards and the Tier 4 emission regulations of the U.S. Environmental Protection Agency (EPA). In the D04EG engine, the particulate matter (PM) levels emitted from the engine have been substantially reduced from those of existing models, and therefore it meets the latest emission regulations without using diesel particulate filters (DPF), keeping the cost low and realizing good usability for forklift truck drivers. For product development, we used our combustion simulation technology to newly design the shape of the combustion chamber and fuel injectors. Thus, we have simultaneously realized both reduced emission levels and lower fuel consumption.