Since Doosan Infracore started making diesel engines during 1958, the business has continued to manufacture its R&D capacities to stay at the forefront of the business in Korea. In 1975, Doosan began mass producing diesel engines at its very first large-scale plant. In ten years the company's production technology had advanced to the point that producing its own diesel engine model was possible. Doosan's leadership position in the industry was secured. In 1995 Doosan produced its first low-emission diesel engine, followed by commercial vehicle CNG engines three years later. Since 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 heavy-duty, low emission diesel engine model in 2007.
Doosan has a lot of facilities around the globe which help manufacture 60 different types of engines, as well as materials and parts. Products include natural gas engines and diesel engines for trucks, forklifts, buses, construction machinery, ships, generators and many more. Engines range from 70 to 1,500 horse power. Yearly output is currently 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 within the US during 2008, and a joint project plant in Xuzhou, China. The plant in China could produce 50,000 diesel engines on a yearly basis, with production scheduled to begin in the year 2011.