In 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 started during 1975, producing diesel engines on a mass scale at its very first large scale facility. In 10 years the company's production technology had advanced to the point that making its own diesel engine model was possible. Doosan's leadership position within the industry was secured. During 1995 Doosan made its first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Ever since the year 2000, the company has developed technology for sophisticated common-rail engines, Tier 3-compliant engines and low-pressure natural gas engines. In order to follow stringent Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model during 2007.
Doosan Infracore has facilities worldwide to produce 60 different kinds of engines, as well as parts and materials. Products include natural gas engines and diesel engines for trucks, forklifts, construction machinery, buses, ships, generators and more. Engines vary from 70 to 1,500 hp. Annual output is now 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 in the US in 2008, and a joint venture plant in Xuzhou, China. The factory in China will have the capacity to make 50,000 diesel engines on a yearly basis, with production scheduled to begin in 2011.