During 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 began during 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 progressed 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 very 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. In order to comply with stringent Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model in the year 2007.
Doosan Infracore has facilities worldwide to make 60 different kinds of engines, as well as parts and materials. Products consist of natural gas engines and diesel engines for forklifts, trucks, buses, construction machines, ships, generators and more. Engines vary from 70 to 1,500 horse power. Yearly 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 more stringent policies governing engine emissions has led the company to make a compressed natural gas engine factory in the US in 2008, and a joint venture factory in Xuzhou, China. The plant in China can produce 50,000 diesel engines on an annual basis, with production scheduled to begin in the year 2011.