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 1975, producing diesel engines on a mass scale at its very first large scale facility. Within ten years the company's production technology had progressed to the point that making its very own diesel engine model was possible. Doosan's leadership position within the business was secured. In 1995 the company made its 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 Tier 3-compliant engines, low-pressure natural gas engines and sophisticated common-rail engines. To be able follow strict Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model during 2007.
Doosan has numerous facilities throughout the globe that help produce 60 different engine models, as well as parts and materials. Products comprise diesel engines and natural gas engines for trucks, forklifts, construction equipment, buses, generators, ships and more. Engines range from 70 to 1,500 hp. Annual output is currently 75,000 units.
Doosan still puts great emphasis on its R&D capabilities that focus on increasing output and expanding into more markets. Demand for stricter regulations governing engine emissions has led the company to make a compressed natural gas engine factory within the US during 2008, and a joint venture plant in Xuzhou, China. The factory in China will have the capacity to produce 50,000 diesel engines on an annual basis, with production scheduled to start in 2011.