Ever since Doosan Infracore started producing diesel engines in the year 1958, the corporation has continued to build its R&D capacities to stay at the forefront of the industry within Korea. In 1975, Doosan started mass producing diesel engines at its very first large-scale plant. Within a decade the production technology of the business had progressed to the point that making its very own diesel engine model was possible. Doosan's leadership position within the business was secured. In the year 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 follow stringent Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model in 2007.
Doosan has lots of facilities throughout the globe that help make 60 different engine models, as well as parts and materials. Products comprise diesel engines and natural gas engines for trucks, forklifts, buses, construction machinery, generators, ships and more. Engines range from 70 to 1,500 hp. Annual output is presently 75,000 units.
Doosan still puts great emphasis on its R&D capabilities that focus on increasing output and expanding into more markets. Demand for stricter policies governing engine emissions has led the company to make a compressed natural gas engine plant in the US during the year 2008, and a joint venture factory in Xuzhou, China. The factory within China will have the capacity to manufacture 50,000 diesel engines on an annual basis, with production scheduled to start in 2011.