In 1958, Doosan Infracore started 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 started in 1975, producing diesel engines on a mass scale at its first large scale facility. Within 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 in the business was secured. In 1995 the company produced its very first low-emission diesel engine, followed by commercial vehicle CNG engines three years later. Ever since 2000, the company has developed technology for low-pressure natural gas engines, sophisticated common-rail engines, and Tier 3-compliant engines. In order to follow stringent Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model during 2007.
Doosan has many facilities around the globe that help manufacture 60 different engine models, as well as materials and parts. Products include natural gas engines and diesel engines for trucks, forklifts, buses, construction equipment, 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 increasing output and expanding into more markets. Demand for stricter policies governing engine emissions has led the company to make a compressed natural gas engine factory within the United States in the year 2008, and a joint venture factory in Xuzhou, China. The factory in China could make 50,000 diesel engines per year, with production scheduled to begin in the year 2011.