During 1958, Doosan Infracore started 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 the year 1975, manufacturing diesel engines on a mass scale at its first large scale facility. In ten years the production technology of the business had progressed to the point that producing its own diesel engine model was possible. Doosan's leadership position within the industry was secured. During 1995 Doosan produced its very first low-emission diesel engine, followed by commercial vehicle CNG engines three years later. Since the year 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 low-emission, heavy-duty diesel engine model during the year 2007.
Doosan has numerous facilities throughout the globe that help produce 60 different engine models, as well as materials and parts. Products comprise diesel engines and natural gas engines for forklifts, trucks, construction machinery, buses, ships, generators and many more. Engines range from 70 to 1,500 horse power. Annual output is now 75,000 units.
Doosan still puts great emphasis on its R&D capabilities which focus on expanding into more markets and increasing output. Demand for stricter regulations governing engine emissions has led the company to make a compressed natural gas engine plant in the US in the year 2008, and a joint venture plant within Xuzhou, China. The factory in China can make 50,000 diesel engines on an annual basis, with production scheduled to begin in the year 2011.