During the year 1958, Doosan Infracore began 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 in 1975, manufacturing diesel engines on a mass scale at its very first large scale facility. In a decade the company's production technology had advanced to the point that producing its own diesel engine model was possible. Doosan's leadership position within the industry was secured. In the year 1995 the company produced its first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Ever since the year 2000, the company has developed technology for Tier 3-compliant engines, low-pressure natural gas engines and sophisticated common-rail engines. In order to comply with strict Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model in the year 2007.
Doosan has numerous facilities throughout the globe that help make 60 different types of engines, as well as materials and parts. Products consist of diesel engines and natural gas engines for forklifts, trucks, construction equipment, buses, generators, ships and many more. Engines range from 70 to 1,500 horse power. Yearly output is presently 75,000 units.
Doosan still puts great emphasis on its R&D capabilities which focus on expanding into more markets and increasing output. Demand for more stringent policies governing engine emissions has led the company to make a compressed natural gas engine factory in the United States during the year 2008, and a joint project factory within Xuzhou, China. The factory in China can produce 50,000 diesel engines per year, with production scheduled to begin in the year 2011.