In the year 1958, Doosan Infracore started to produce diesel engines and has continued R&D to help stay ahead of the curve within Korea's heavy and material handling industry. Doosan started in the year 1975, producing 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 making its own diesel engine model was possible. Doosan's leadership position in the business was secured. In 1995 the company made its first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Since 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 low-emission, heavy-duty diesel engine model in the year 2007.
Doosan Infracore has facilities worldwide to make 60 different kinds of engines, as well as materials and parts. Products consist of natural gas engines and diesel engines for trucks, forklifts, construction equipment, buses, ships, generators and 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 that focus on increasing output and expanding into more markets. Demand for stricter regulations governing engine emissions has led the company to build a compressed natural gas engine factory within the United States during the year 2008, and a joint project plant within Xuzhou, China. The factory within China can produce 50,000 diesel engines per year, with production scheduled to begin in 2011.