In 1958, Doosan Infracore began to produce 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, manufacturing diesel engines on a mass scale at its very first large scale facility. In a decade the production technology of the company had advanced to the point that making its very own diesel engine model was possible. Doosan's leadership position within the industry was secured. During the year 1995 Doosan produced its very first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Since the year 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 heavy-duty, low emission diesel engine model in 2007.
Doosan Infracore has facilities worldwide to manufacture 60 different kinds of engines, as well as materials and parts. Products comprise natural gas engines and diesel engines for forklifts, trucks, construction machinery, buses, ships, generators and more. Engines range from 70 to 1,500 horse power. Annual output is currently 75,000 units.
The company is continually engaged in expanding R&D capabilities to increase output and expand to more markets. Demand for stricter policies governing engine emissions has led the company to make a compressed natural gas engine plant in the United States in 2008, and a joint project factory within Xuzhou, China. The factory within China would have the capacity to manufacture 50,000 diesel engines on an annual basis, with production scheduled to begin in the year 2011.