Ever since Doosan Infracore started producing diesel engines during 1958, the corporation has continued to manufacture its R&D capacities to stay at the forefront of the business in Korea. In 1975, Doosan began mass producing diesel engines at its very first large-scale plant. Within ten years the production technology of the business had progressed to the point that producing its very own diesel engine model was possible. Doosan's leadership position within the business was secured. In 1995 Doosan made its very 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 low-pressure natural gas engines, sophisticated common-rail engines, and Tier 3-compliant engines. To be able comply with stringent 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 kinds of engines, as well as materials and parts. Products comprise diesel engines and natural gas engines for trucks, forklifts, buses, construction machinery, generators, ships and many more. Engines range from 70 to 1,500 horse power. Annual output is now 75,000 units.
Doosan still puts great emphasis on its R&D capabilities which focus on increasing output and expanding into more markets. Demand for more stringent regulations governing engine emissions has led the company to make a compressed natural gas engine factory within the US during the year 2008, and a joint project factory in Xuzhou, China. The factory within China could manufacture 50,000 diesel engines on an annual basis, with production scheduled to begin in 2011.