Since Doosan Infracore started producing diesel engines during the year 1958, the corporation has continued to build its R&D capacities to stay at the forefront of the business in Korea. In the year 1975, Doosan started mass producing diesel engines at its first large-scale plant. In 10 years the production technology of the company 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 the year 1995 the company made its first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. 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 strict Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model in the year 2007.
Doosan has many facilities throughout the world which help produce 60 different engine models, as well as materials and parts. Products consist of diesel engines and natural gas engines for trucks, forklifts, construction machinery, buses, ships, generators and more. Engines range from 70 to 1,500 hp. Annual output is presently 75,000 units.
The company is continually engaged in expanding R&D capabilities to expand to more markets and increase output. Demand for more stringent policies governing engine emissions has led the company to make a compressed natural gas engine factory in the US during 2008, and a joint project plant within Xuzhou, China. The factory within China could produce 50,000 diesel engines on an annual basis, with production scheduled to begin in 2011.