Ever since Doosan Infracore began making diesel engines during the year 1958, the business has continued to manufacture its R&D capacities to stay at the forefront of the business within Korea. During 1975, Doosan began mass producing diesel engines at its very first large-scale plant. In 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 business was secured. In the year 1995 Doosan produced 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 comply with strict Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model in the year 2007.
Doosan has many facilities throughout the world that help produce 60 different engine models, as well as parts and materials. Products consist of natural gas engines and diesel engines for forklifts, trucks, buses, construction machines, 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 make a compressed natural gas engine factory in the US during the year 2008, and a joint venture factory in Xuzhou, China. The factory within China can produce 50,000 diesel engines each year, with production scheduled to begin in the year 2011.