During the year 1958, Doosan Infracore began to make diesel engines and has continued R&D to help stay ahead of the curve in 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 a decade the company's production technology had advanced to the point that production of its very own diesel engine model was possible. Doosan's leadership position within the business was secured. In the year 1995 the company produced its very 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. To be able comply with strict Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model during the year 2007.
Doosan Infracore has facilities worldwide to produce 60 different engine models, as well as materials and parts. Products include diesel engines and natural gas engines for trucks, forklifts, 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 which focus on expanding into more markets and increasing output. Demand for more stringent regulations governing engine emissions has led the company to make a compressed natural gas engine plant within the US in 2008, and a joint project plant in Xuzhou, China. The plant in China could make 50,000 diesel engines per year, with production scheduled to start in the year 2011.