Ever since Doosan Infracore began producing diesel engines during the year 1958, the company has continued to manufacture its R&D capacities to stay at the forefront of the business in Korea. During the year 1975, Doosan started mass producing diesel engines at its first large-scale plant. Within 10 years the company's production technology had advanced to the point that making its very own diesel engine model was possible. Doosan's leadership position in the business was secured. In the year 1995 Doosan made its first low-emission diesel engine, followed by commercial vehicle CNG engines three years later. Ever since 2000, the company has developed technology for sophisticated common-rail engines, Tier 3-compliant engines and low-pressure natural gas engines. In order to follow stringent Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model during 2007.
Doosan has many facilities throughout the globe that help make 60 different types of engines, as well as materials and parts. Products consist of diesel engines and natural gas engines for trucks, forklifts, buses, construction equipment, generators, ships and more. Engines vary from 70 to 1,500 horse power. Annual output is presently 75,000 units.
The company is continually engaged in expanding R&D capabilities to increase output and expand to more markets. Demand for stricter regulations governing engine emissions has led the company to build a compressed natural gas engine factory in the US in the year 2008, and a joint venture factory in Xuzhou, China. The plant in China could make 50,000 diesel engines on a yearly basis, with production scheduled to start in 2011.