Since Doosan Infracore started making diesel engines during 1958, the corporation has continued to build its R&D capacities to stay at the forefront of the industry within Korea. In 1975, Doosan began mass producing diesel engines at its very first large-scale plant. In a decade the company's production technology had advanced to the point that producing its own diesel engine model was possible. Doosan's leadership position within the business was secured. During 1995 the company made its very first low-emission diesel engine, followed by commercial vehicle CNG engines three years later. Ever since the year 2000, the company has developed technology for sophisticated common-rail engines, Tier 3-compliant engines and low-pressure natural gas engines. In order to follow strict Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model during the year 2007.
Doosan Infracore has facilities worldwide to manufacture 60 different engine models, as well as parts and materials. Products consist of natural gas engines and diesel engines for forklifts, trucks, construction equipment, buses, generators, ships and many more. Engines range from 70 to 1,500 horse power. Annual output is presently 75,000 units.
The company is continually engaged in expanding R&D capabilities to increase output and expand to more markets. Demand for more stringent policies governing engine emissions has led the company to build a compressed natural gas engine factory in the United States during 2008, and a joint venture plant in Xuzhou, China. The plant within China could manufacture 50,000 diesel engines on an annual basis, with production scheduled to start in 2011.