During 1958, Doosan Infracore started to make diesel engines and has continued R&D to help stay ahead of the curve within Korea's heavy and material handling industry. Doosan began in 1975, manufacturing diesel engines on a mass scale at its very first large scale facility. In 10 years the company's production technology had advanced to the point that producing its very own diesel engine model was possible. Doosan's leadership position within the industry was secured. In the year 1995 Doosan 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. To be able comply with strict Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model in 2007.
Doosan Infracore has facilities worldwide to produce 60 different engine models, as well as materials and parts. Products consist of natural gas engines and diesel engines for trucks, forklifts, buses, construction machinery, generators, ships and more. Engines range from 70 to 1,500 horse power. Annual output is presently 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 stricter regulations 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 project plant within Xuzhou, China. The plant within China can produce 50,000 diesel engines on an annual basis, with production scheduled to begin in the year 2011.