During 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 began in the year 1975, producing diesel engines on a mass scale at its first large scale facility. In a decade the production technology of the company 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 the company produced its first low-emission diesel engine, followed by commercial vehicle CNG engines three years later. 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 stringent 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 engine models, as well as parts and materials. Products include diesel engines and natural gas engines for forklifts, trucks, buses, construction machinery, generators, ships and more. Engines vary from 70 to 1,500 horse power. Yearly output is now 75,000 units.
Doosan still puts great emphasis on its R&D capabilities that focus on expanding into more markets and increasing output. Demand for more stringent policies governing engine emissions has led the company to build a compressed natural gas engine factory within the United States in the year 2008, and a joint project factory in Xuzhou, China. The factory in China would have the capacity to manufacture 50,000 diesel engines per year, with production scheduled to begin in the year 2011.