Ever since Doosan Infracore began producing diesel engines during 1958, the company 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 first large-scale plant. Within a decade the production technology of the business had progressed 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 made its 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. In order to follow stringent Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model during 2007.
Doosan Infracore has facilities worldwide to produce 60 different kinds of engines, as well as parts and materials. Products comprise diesel engines and natural gas engines for forklifts, trucks, construction machines, buses, generators, ships and more. Engines range from 70 to 1,500 hp. Annual output is currently 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 regulations governing engine emissions has led the company to build a compressed natural gas engine plant in the United States in the year 2008, and a joint venture plant within Xuzhou, China. The factory in China will have the capacity to manufacture 50,000 diesel engines on a yearly basis, with production scheduled to start in 2011.