Ever since Doosan Infracore began producing diesel engines during the year 1958, the corporation has continued to manufacture its R&D capacities to stay at the forefront of the business within Korea. In the year 1975, Doosan began mass producing diesel engines at its very first large-scale plant. Within a decade the company's production technology had progressed to the point that production of its very own diesel engine model was possible. Doosan's leadership position within the industry was secured. In 1995 Doosan produced its first low-emission diesel engine, followed by commercial vehicle CNG engines three years later. Ever since 2000, the company has developed technology for sophisticated common-rail engines, Tier 3-compliant engines and low-pressure natural gas 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 manufacture 60 different engine models, as well as materials and parts. Products consist of diesel engines and natural gas engines for forklifts, trucks, buses, construction machines, ships, generators and many more. Engines vary from 70 to 1,500 horse power. Yearly output is currently 75,000 units.
Doosan still puts great emphasis on its R&D capabilities which focus on expanding into more markets and increasing output. Demand for more stringent 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 venture plant in Xuzhou, China. The factory in China will have the capacity to make 50,000 diesel engines on an annual basis, with production scheduled to start in the year 2011.