During 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 1975, manufacturing diesel engines on a mass scale at its very first large scale facility. In a decade the company's production technology had progressed to the point that production of its very own diesel engine model was possible. Doosan's leadership position in the business was secured. During 1995 Doosan produced its very first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Since the year 2000, the company has developed technology for sophisticated common-rail engines, Tier 3-compliant engines and low-pressure natural gas engines. To be able comply with 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 which help produce 60 different types of engines, as well as materials and parts. Products consist of natural gas engines and diesel engines for trucks, forklifts, buses, construction equipment, ships, generators and many more. Engines range from 70 to 1,500 hp. Yearly output is presently 75,000 units.
The company is continually engaged in expanding R&D capabilities to expand to more markets and increase output. Demand for more stringent regulations governing engine emissions has led the company to make a compressed natural gas engine factory in the United States during the year 2008, and a joint venture plant within Xuzhou, China. The plant in China would have the capacity to make 50,000 diesel engines every year, with production scheduled to begin in the year 2011.