In the year 1958, Doosan Infracore began 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 began in 1975, manufacturing diesel engines on a mass scale at its very first large scale facility. In ten years the company's production technology had progressed to the point that producing its own diesel engine model was possible. Doosan's leadership position in the industry was secured. During 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 strict Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model during the year 2007.
Doosan Infracore has facilities worldwide to make 60 different engine models, as well as parts and materials. Products include natural gas engines and diesel engines for forklifts, trucks, construction machinery, buses, generators, ships and many more. Engines range from 70 to 1,500 horse power. 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 regulations governing engine emissions has led the company to build a compressed natural gas engine plant within the US during the year 2008, and a joint venture factory in Xuzhou, China. The plant in China will have the capacity to produce 50,000 diesel engines on an annual basis, with production scheduled to begin in the year 2011.