In 1958, Doosan Infracore began 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 started during the year 1975, producing diesel engines on a mass scale at its first large scale facility. In 10 years the production technology of the business had advanced to the point that making its own diesel engine model was possible. Doosan's leadership position in the industry was secured. During the year 1995 the company produced its very first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Since 2000, the company has developed technology for Tier 3-compliant engines, low-pressure natural gas engines and sophisticated common-rail engines. In order to comply with strict Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model in the year 2007.
Doosan Infracore has facilities worldwide to make 60 different engine models, as well as materials and parts. Products include natural gas engines and diesel engines for trucks, forklifts, construction machines, buses, ships, generators and many more. Engines range from 70 to 1,500 horse power. 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 build a compressed natural gas engine plant in the US in 2008, and a joint project plant in Xuzhou, China. The plant within China could make 50,000 diesel engines on a yearly basis, with production scheduled to start in 2011.