Since Doosan Infracore began producing diesel engines in 1958, the company has continued to manufacture its R&D capacities to stay at the forefront of the industry in Korea. During the year 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 producing its 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. Ever since 2000, the company has developed technology for Tier 3-compliant engines, low-pressure natural gas engines and sophisticated common-rail engines. In order to follow strict Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model in 2007.
Doosan Infracore has facilities worldwide to make 60 different kinds of engines, as well as parts and materials. Products comprise diesel engines and natural gas engines for trucks, forklifts, construction machines, buses, generators, ships and many more. Engines vary from 70 to 1,500 hp. Yearly 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 regulations governing engine emissions has led the company to make a compressed natural gas engine plant within the United States during the year 2008, and a joint project factory in Xuzhou, China. The factory within China could produce 50,000 diesel engines on a yearly basis, with production scheduled to begin in 2011.