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 started in 1975, manufacturing diesel engines on a mass scale at its first large scale facility. Within a decade the production technology of the company had advanced to the point that producing its own diesel engine model was possible. Doosan's leadership position in the industry was secured. During 1995 the company produced its first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Since 2000, the company has developed technology for low-pressure natural gas engines, sophisticated common-rail engines, and Tier 3-compliant engines. To be able follow stringent 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 make 60 different kinds of engines, as well as materials and parts. Products include natural gas engines and diesel engines for trucks, forklifts, construction equipment, buses, ships, generators and more. Engines range from 70 to 1,500 hp. Yearly output is now 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 stricter regulations governing engine emissions has led the company to build a compressed natural gas engine factory in the United States during 2008, and a joint venture plant within Xuzhou, China. The plant in China will have the capacity to produce 50,000 diesel engines on a yearly basis, with production scheduled to begin in 2011.