In the year 1958, Doosan Infracore began to produce 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, producing diesel engines on a mass scale at its very first large scale facility. Within a decade the production technology of the company 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. In 1995 Doosan made 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 during 2007.
Doosan has a lot of facilities around the globe which help produce 60 different types of engines, as well as parts and materials. Products consist of natural gas engines and diesel engines for trucks, forklifts, buses, construction equipment, generators, ships and more. Engines range from 70 to 1,500 hp. Annual output is currently 75,000 units.
Doosan still puts great emphasis on its R&D capabilities which focus on increasing output and expanding into more markets. Demand for more stringent policies governing engine emissions has led the company to make a compressed natural gas engine plant in the US in 2008, and a joint project factory within Xuzhou, China. The plant in China would have the capacity to produce 50,000 diesel engines on an annual basis, with production scheduled to start in the year 2011.