During the year 1958, Doosan Infracore started to make diesel engines and has continued R&D to help stay ahead of the curve in Korea's heavy and material handling industry. Doosan began during 1975, manufacturing diesel engines on a mass scale at its very first large scale facility. Within ten years the production technology of the business had progressed to the point that production of its own diesel engine model was possible. Doosan's leadership position within the business was secured. In the year 1995 Doosan produced its first low-emission diesel engine, followed by commercial vehicle CNG engines three years later. Ever since the year 2000, the company has developed technology for sophisticated common-rail engines, Tier 3-compliant engines and low-pressure natural gas engines. In order to comply with strict Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model during 2007.
Doosan has many facilities throughout the globe that help manufacture 60 different engine models, as well as materials and parts. Products consist of diesel engines and natural gas engines for forklifts, trucks, buses, construction equipment, generators, ships and more. Engines vary from 70 to 1,500 hp. Yearly output is now 75,000 units.
The company is continually engaged in expanding R&D capabilities to increase output and expand to more markets. Demand for more stringent regulations governing engine emissions has led the company to build a compressed natural gas engine factory within the United States in 2008, and a joint project factory in Xuzhou, China. The plant in China could make 50,000 diesel engines on an annual basis, with production scheduled to begin in 2011.