During 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 during 1975, manufacturing diesel engines on a mass scale at its very first large scale facility. Within a decade 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 industry was secured. During the year 1995 the company made its 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. To be able follow stringent Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model in the year 2007.
Doosan has lots of facilities throughout the globe which help produce 60 different engine models, as well as parts and materials. Products include diesel engines and natural gas engines for trucks, forklifts, construction machinery, buses, ships, generators and many more. Engines range 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 expand to more markets and increase output. Demand for more stringent policies governing engine emissions has led the company to build a compressed natural gas engine factory within the United States during the year 2008, and a joint venture plant in Xuzhou, China. The factory within China can produce 50,000 diesel engines on a yearly basis, with production scheduled to begin in the year 2011.