During 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, manufacturing diesel engines on a mass scale at its first large scale facility. Within a decade the company's production technology had progressed to the point that making its very own diesel engine model was possible. Doosan's leadership position in the industry was secured. In 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 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 low-emission, heavy-duty diesel engine model during the year 2007.
Doosan Infracore has facilities worldwide to produce 60 different kinds of engines, as well as parts and materials. Products include diesel engines and natural gas engines for forklifts, trucks, buses, construction equipment, ships, generators and many more. Engines range from 70 to 1,500 horse power. Yearly output is currently 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 policies governing engine emissions has led the company to make a compressed natural gas engine factory in the United States in the year 2008, and a joint project factory in Xuzhou, China. The plant within China could make 50,000 diesel engines per year, with production scheduled to begin in the year 2011.