In the year 1958, Doosan Infracore started to make diesel engines and has continued R&D to help stay ahead of the curve within Korea's heavy and material handling industry. Doosan started during the year 1975, manufacturing diesel engines on a mass scale at its first large scale facility. In a decade the company's production technology had progressed to the point that production of its very own diesel engine model was possible. Doosan's leadership position in the business was secured. During the year 1995 Doosan made its first low-emission diesel engine, followed by commercial vehicle CNG engines three years later. Ever since 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 stringent Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model during 2007.
Doosan has numerous facilities throughout the world that help make 60 different types of engines, as well as materials and parts. Products include diesel engines and natural gas engines for trucks, forklifts, buses, construction equipment, generators, ships and many more. Engines range from 70 to 1,500 horse power. Annual output is presently 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 policies governing engine emissions has led the company to build a compressed natural gas engine plant within the US during 2008, and a joint venture factory in Xuzhou, China. The factory in China can manufacture 50,000 diesel engines per year, with production scheduled to start in 2011.