In 1958, Doosan Infracore started 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 the year 1975, producing diesel engines on a mass scale at its very 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 business was secured. In 1995 Doosan 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. In order to follow strict Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model during 2007.
Doosan Infracore has facilities worldwide to make 60 different engine models, as well as materials and parts. Products consist of natural gas engines and diesel engines for forklifts, trucks, construction equipment, buses, ships, generators and more. Engines vary from 70 to 1,500 hp. Yearly output is presently 75,000 units.
The company is continually engaged in expanding R&D capabilities to expand to more markets and increase output. Demand for stricter policies governing engine emissions has led the company to make a compressed natural gas engine plant in the US during 2008, and a joint project factory in Xuzhou, China. The plant within China can produce 50,000 diesel engines on an annual basis, with production scheduled to begin in 2011.