During the year 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 in 1975, manufacturing diesel engines on a mass scale at its first large scale facility. In 10 years the company's production technology had advanced to the point that production of its own diesel engine model was possible. Doosan's leadership position within the business was secured. In the year 1995 the company made its first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Ever since the year 2000, the company has developed technology for Tier 3-compliant engines, low-pressure natural gas engines and sophisticated common-rail engines. To be able follow strict Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model in 2007.
Doosan Infracore has facilities worldwide to manufacture 60 different engine models, as well as materials and parts. Products consist of diesel engines and natural gas engines for trucks, forklifts, buses, construction machinery, ships, generators and many more. Engines vary from 70 to 1,500 horse power. Yearly output is presently 75,000 units.
Doosan still puts great emphasis on its R&D capabilities that focus on expanding into more markets and increasing output. Demand for stricter regulations governing engine emissions has led the company to build a compressed natural gas engine factory in the US during 2008, and a joint project factory within Xuzhou, China. The factory within China could make 50,000 diesel engines each year, with production scheduled to begin in the year 2011.