During the year 1958, Doosan Infracore started 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 the year 1975, manufacturing 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 very own diesel engine model was possible. Doosan's leadership position in the business was secured. In 1995 Doosan made its first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Since 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 strict 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 manufacture 60 different kinds of engines, as well as parts and materials. Products include natural gas engines and diesel engines for forklifts, trucks, buses, construction machinery, ships, generators and many more. Engines range from 70 to 1,500 hp. Yearly output is presently 75,000 units.
Doosan still puts great emphasis on its R&D capabilities which focus on expanding into more markets and increasing output. Demand for more stringent policies 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 factory in China can make 50,000 diesel engines each year, with production scheduled to start in the year 2011.