Since Doosan Infracore began making diesel engines during the year 1958, the corporation has continued to manufacture its R&D capacities to stay at the forefront of the industry within Korea. In 1975, Doosan began mass producing diesel engines at its first large-scale plant. In a decade the production technology of the business had progressed to the point that making its own diesel engine model was possible. Doosan's leadership position in the business was secured. In 1995 Doosan made its very first low-emission diesel engine, followed by commercial vehicle CNG engines three years later. 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 comply with strict Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model in 2007.
Doosan has lots of facilities around the world which help make 60 different engine models, as well as materials and parts. Products consist of natural gas engines and diesel engines for forklifts, trucks, buses, construction machinery, ships, generators and more. Engines vary from 70 to 1,500 hp. Annual 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 build a compressed natural gas engine plant within the US in the year 2008, and a joint project factory within Xuzhou, China. The plant within China can produce 50,000 diesel engines on an annual basis, with production scheduled to begin in the year 2011.