During 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 during the year 1975, manufacturing diesel engines on a mass scale at its very first large scale facility. In ten years the production technology of the business had advanced to the point that production of its own diesel engine model was possible. Doosan's leadership position within the industry was secured. During the year 1995 the company produced 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 Tier 3-compliant engines, low-pressure natural gas engines and sophisticated common-rail engines. To be able follow strict Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model during 2007.
Doosan Infracore has facilities worldwide to manufacture 60 different kinds of engines, as well as materials and parts. Products include diesel engines and natural gas engines for trucks, forklifts, construction machines, buses, 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 that focus on increasing output and expanding into more markets. Demand for more stringent policies governing engine emissions has led the company to build a compressed natural gas engine plant within the US in the year 2008, and a joint project factory in Xuzhou, China. The factory within China could produce 50,000 diesel engines per year, with production scheduled to begin in 2011.