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 in 1975, producing diesel engines on a mass scale at its very first large scale facility. In ten years the company's production technology had advanced to the point that producing its own diesel engine model was possible. Doosan's leadership position in the industry was secured. During 1995 the company made its 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. In order to follow strict 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 throughout the world which help manufacture 60 different engine models, as well as materials and parts. Products include natural gas engines and diesel engines for forklifts, trucks, buses, construction machinery, generators, ships and more. Engines vary from 70 to 1,500 hp. Yearly output is currently 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 within the US in 2008, and a joint venture plant within Xuzhou, China. The plant in China could manufacture 50,000 diesel engines on an annual basis, with production scheduled to start in 2011.