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 began during the year 1975, manufacturing diesel engines on a mass scale at its very first large scale facility. In ten years the company's production technology had progressed to the point that producing its own diesel engine model was possible. Doosan's leadership position in the business was secured. During 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 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 heavy-duty, low emission diesel engine model during 2007.
Doosan has numerous facilities around the world that help produce 60 different types of engines, as well as parts and materials. Products include natural gas engines and diesel engines for trucks, forklifts, construction equipment, buses, generators, ships and more. Engines vary from 70 to 1,500 horse power. 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 plant within the United States during 2008, and a joint venture plant within Xuzhou, China. The plant in China could manufacture 50,000 diesel engines each year, with production scheduled to start in 2011.