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 production technology of the business had progressed to the point that making its own diesel engine model was possible. Doosan's leadership position in the industry was secured. During the year 1995 Doosan produced its first low-emission diesel engine, followed by commercial vehicle CNG engines three years later. Since the year 2000, the company has developed technology for low-pressure natural gas engines, sophisticated common-rail engines, and Tier 3-compliant engines. In order to comply with stringent Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model during the year 2007.
Doosan Infracore has facilities worldwide to produce 60 different kinds of engines, as well as materials and parts. Products consist of natural gas engines and diesel engines for forklifts, trucks, construction machinery, buses, ships, generators and many more. Engines vary from 70 to 1,500 hp. Annual 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 regulations governing engine emissions has led the company to make a compressed natural gas engine plant within the US during 2008, and a joint project plant within Xuzhou, China. The plant in China can produce 50,000 diesel engines each year, with production scheduled to start in 2011.