During the year 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 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 company had advanced to the point that production of its very own diesel engine model was possible. Doosan's leadership position in the business was secured. In 1995 Doosan made its very first low-emission diesel engine, followed by commercial vehicle CNG engines three years later. Ever since 2000, the company has developed technology for Tier 3-compliant engines, low-pressure natural gas engines and sophisticated common-rail engines. To be able follow stringent Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model in the year 2007.
Doosan has many facilities throughout the globe that help produce 60 different types of engines, as well as materials and parts. Products include natural gas engines and diesel engines for trucks, forklifts, buses, construction machines, ships, generators and more. Engines range from 70 to 1,500 horse power. Annual output is presently 75,000 units.
Doosan still puts great emphasis on its R&D capabilities that focus on expanding into more markets and increasing output. Demand for more stringent regulations governing engine emissions has led the company to make a compressed natural gas engine plant within the US during the year 2008, and a joint project factory in Xuzhou, China. The factory in China could make 50,000 diesel engines each year, with production scheduled to begin in 2011.