Since Doosan Infracore started producing diesel engines in 1958, the corporation has continued to build its R&D capacities to stay at the forefront of the industry in Korea. During 1975, Doosan began mass producing diesel engines at its first large-scale plant. In a decade the production technology of the company 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 very first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Ever since the year 2000, the company has developed technology for sophisticated common-rail engines, Tier 3-compliant engines and low-pressure natural gas engines. To be able comply with strict Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model during the year 2007.
Doosan Infracore has facilities worldwide to make 60 different kinds of engines, as well as parts and materials. Products comprise natural gas engines and diesel engines for forklifts, trucks, buses, construction equipment, ships, generators and more. Engines range from 70 to 1,500 horse power. Annual output is now 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 plant in the United States during 2008, and a joint venture plant in Xuzhou, China. The plant within China can produce 50,000 diesel engines on an annual basis, with production scheduled to start in 2011.