Since Doosan Infracore began producing diesel engines during the year 1958, the company has continued to build its R&D capacities to stay at the forefront of the industry within Korea. In the year 1975, Doosan started mass producing diesel engines at its very first large-scale plant. Within a decade the production technology of the company had progressed to the point that making its own diesel engine model was possible. Doosan's leadership position within the business was secured. In 1995 Doosan produced its very first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Ever since 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 heavy-duty, low emission diesel engine model during the year 2007.
Doosan has lots of facilities throughout the world which help produce 60 different engine models, as well as materials and parts. Products consist of diesel engines and natural gas engines for trucks, forklifts, construction equipment, buses, generators, ships and many more. Engines range from 70 to 1,500 hp. Yearly 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 build a compressed natural gas engine factory in the US in the year 2008, and a joint venture factory in Xuzhou, China. The plant within China could make 50,000 diesel engines on a yearly basis, with production scheduled to start in the year 2011.