During the year 1958, Doosan Infracore started to make diesel engines and has continued R&D to help stay ahead of the curve in Korea's heavy and material handling industry. Doosan began in 1975, manufacturing diesel engines on a mass scale at its first large scale facility. In a decade the company's production technology had progressed to the point that producing its very 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 after three years. 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 follow strict Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model in 2007.
Doosan Infracore has facilities worldwide to manufacture 60 different engine models, as well as materials and parts. Products consist of diesel engines and natural gas engines for trucks, forklifts, construction machines, buses, generators, ships and more. Engines range from 70 to 1,500 hp. Yearly output is now 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 more stringent regulations governing engine emissions has led the company to make a compressed natural gas engine plant in the United States in the year 2008, and a joint venture plant in Xuzhou, China. The plant within China will have the capacity to manufacture 50,000 diesel engines every year, with production scheduled to begin in 2011.