During 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, manufacturing diesel engines on a mass scale at its very first large scale facility. Within 10 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 industry was secured. During the year 1995 the company made 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 low-pressure natural gas engines, sophisticated common-rail engines, and Tier 3-compliant engines. To be able comply with strict Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model in 2007.
Doosan Infracore has facilities worldwide to manufacture 60 different kinds of engines, as well as materials and parts. Products include diesel engines and natural gas engines for forklifts, trucks, construction machines, buses, ships, generators and more. Engines vary 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 expand to more markets and increase output. Demand for stricter regulations governing engine emissions has led the company to build a compressed natural gas engine factory in the US during 2008, and a joint venture factory within Xuzhou, China. The factory within China would have the capacity to produce 50,000 diesel engines on a yearly basis, with production scheduled to begin in the year 2011.