During 1958, Doosan Infracore began to make diesel engines and has continued R&D to help stay ahead of the curve in 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. Within ten years the company's production technology had advanced to the point that production of its own diesel engine model was possible. Doosan's leadership position in the industry was secured. In the year 1995 the company made its very first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Since the year 2000, the company has developed technology for sophisticated common-rail engines, Tier 3-compliant engines and low-pressure natural gas engines. To be able follow strict Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model in the year 2007.
Doosan Infracore has facilities worldwide to produce 60 different engine models, as well as parts and materials. Products include natural gas engines and diesel engines for trucks, forklifts, construction machinery, buses, generators, ships and many more. Engines vary from 70 to 1,500 horse power. Yearly 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 make a compressed natural gas engine factory in the United States in the year 2008, and a joint venture plant in Xuzhou, China. The plant within China will have the capacity to produce 50,000 diesel engines every year, with production scheduled to begin in the year 2011.