Ever since Doosan Infracore began producing diesel engines in the year 1958, the company has continued to manufacture its R&D capacities to stay at the forefront of the industry within Korea. In 1975, Doosan started mass producing diesel engines at its first large-scale plant. In ten years 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 the year 1995 Doosan made its first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. 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 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 engine models, as well as parts and materials. Products consist of natural gas engines and diesel engines for trucks, forklifts, buses, construction machines, generators, ships and 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 that focus on expanding into more markets and increasing output. Demand for more stringent policies governing engine emissions has led the company to make a compressed natural gas engine factory within the United States during the year 2008, and a joint venture plant within Xuzhou, China. The plant within China could make 50,000 diesel engines on an annual basis, with production scheduled to start in the year 2011.