Since Doosan Infracore started making diesel engines during 1958, the business has continued to build its R&D capacities to stay at the forefront of the industry in Korea. During 1975, Doosan started mass producing diesel engines at its very first large-scale plant. In a decade the production technology of the company had advanced to the point that production of its very own diesel engine model was possible. Doosan's leadership position within the business was secured. During the year 1995 the company produced its first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Since 2000, the company has developed technology for sophisticated common-rail engines, Tier 3-compliant engines and low-pressure natural gas 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 parts and materials. Products include natural gas engines and diesel engines for forklifts, trucks, buses, construction machines, generators, ships and many more. Engines range from 70 to 1,500 hp. 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 stricter policies governing engine emissions has led the company to build a compressed natural gas engine factory within the United States in 2008, and a joint project plant within Xuzhou, China. The factory in China will have the capacity to produce 50,000 diesel engines each year, with production scheduled to start in 2011.