Since Doosan Infracore began producing diesel engines in the year 1958, the company has continued to build its R&D capacities to stay at the forefront of the business within Korea. In 1975, Doosan started mass producing diesel engines at its very first large-scale plant. In 10 years the company's production technology had progressed to the point that production of its own diesel engine model was possible. Doosan's leadership position in the business was secured. During the year 1995 Doosan produced 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 low-pressure natural gas engines, sophisticated common-rail engines, and Tier 3-compliant engines. To be able follow strict Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model during 2007.
Doosan has many facilities throughout the world that help produce 60 different engine models, as well as materials and parts. Products include natural gas engines and diesel engines for forklifts, trucks, construction machinery, buses, generators, ships and many more. Engines vary from 70 to 1,500 hp. Yearly output is currently 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 in 2008, and a joint project plant in Xuzhou, China. The factory within China could manufacture 50,000 diesel engines on an annual basis, with production scheduled to start in 2011.