During 1958, Doosan Infracore began to produce diesel engines and has continued R&D to help stay ahead of the curve within Korea's heavy and material handling industry. Doosan started in the year 1975, manufacturing diesel engines on a mass scale at its very first large scale facility. Within a decade the production technology of the business had progressed to the point that making its very own diesel engine model was possible. Doosan's leadership position in the industry was secured. In the year 1995 the company made its very first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Ever since 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 stringent Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model during the year 2007.
Doosan has a lot of facilities around the world that help produce 60 different engine models, as well as parts and materials. Products consist of diesel engines and natural gas engines for trucks, forklifts, construction machines, buses, generators, ships and many more. Engines range from 70 to 1,500 hp. 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 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 an annual basis, with production scheduled to start in 2011.