In 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 began in the year 1975, producing diesel engines on a mass scale at its first large scale facility. In ten years the production technology of the company had advanced to the point that production of its own diesel engine model was possible. Doosan's leadership position in the business was secured. In the year 1995 the company produced its first low-emission diesel engine, followed by commercial vehicle CNG engines three years later. 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 heavy-duty, low emission diesel engine model in the year 2007.
Doosan Infracore has facilities worldwide to make 60 different engine models, as well as materials and parts. Products comprise diesel engines and natural gas engines for forklifts, trucks, buses, construction machinery, ships, generators and more. Engines range from 70 to 1,500 hp. Annual 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 plant within the US during the year 2008, and a joint project plant within Xuzhou, China. The plant within China would have the capacity to manufacture 50,000 diesel engines on an annual basis, with production scheduled to begin in 2011.