In 1958, Doosan Infracore started 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 began during the year 1975, producing diesel engines on a mass scale at its first large scale facility. In ten years the production technology of the business had progressed to the point that production of its very own diesel engine model was possible. Doosan's leadership position in the industry was secured. In 1995 Doosan made its first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Since the year 2000, the company has developed technology for Tier 3-compliant engines, low-pressure natural gas engines and sophisticated common-rail engines. In order to follow stringent Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model in 2007.
Doosan Infracore has facilities worldwide to produce 60 different kinds of engines, as well as materials and parts. Products comprise natural gas engines and diesel engines for trucks, forklifts, buses, construction machines, ships, generators and many more. Engines range from 70 to 1,500 horse power. Annual output is presently 75,000 units.
The company is continually engaged in expanding R&D capabilities to increase output and expand to more markets. Demand for stricter regulations governing engine emissions has led the company to build a compressed natural gas engine factory in the United States during 2008, and a joint venture plant within Xuzhou, China. The factory in China could produce 50,000 diesel engines on a yearly basis, with production scheduled to start in the year 2011.