Since Doosan Infracore began producing diesel engines during 1958, the company has continued to manufacture its R&D capacities to stay at the forefront of the industry within Korea. During 1975, Doosan began mass producing diesel engines at its very first large-scale plant. Within a decade the company's production technology had advanced to the point that making its very own diesel engine model was possible. Doosan's leadership position within the business was secured. In the year 1995 the company made 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. In order to comply with strict Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model in the year 2007.
Doosan has a lot of facilities throughout the world which help make 60 different engine models, as well as materials and parts. Products comprise natural gas engines and diesel engines for trucks, forklifts, buses, construction equipment, ships, generators and 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 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 within the US in the year 2008, and a joint project factory in Xuzhou, China. The plant within China could manufacture 50,000 diesel engines every year, with production scheduled to begin in 2011.