During 1958, Doosan Infracore started to produce 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 the year 1975, manufacturing diesel engines on a mass scale at its very first large scale facility. Within a decade the company's production technology had advanced to the point that making its own diesel engine model was possible. Doosan's leadership position within the industry was secured. During the year 1995 Doosan produced its first low-emission diesel engine, followed by commercial vehicle CNG engines three years later. Ever since 2000, the company has developed technology for low-pressure natural gas engines, sophisticated common-rail engines, and Tier 3-compliant engines. In order to comply with stringent Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model during 2007.
Doosan Infracore has facilities worldwide to manufacture 60 different kinds of engines, as well as parts and materials. Products comprise natural gas engines and diesel engines for forklifts, trucks, buses, construction machines, generators, ships and many more. Engines range from 70 to 1,500 horse power. Annual output is presently 75,000 units.
The company is continually engaged in expanding R&D capabilities to expand to more markets and increase output. Demand for stricter policies governing engine emissions has led the company to build a compressed natural gas engine factory within the US during 2008, and a joint project factory in Xuzhou, China. The plant in China could make 50,000 diesel engines on a yearly basis, with production scheduled to start in 2011.