Since Doosan Infracore started making diesel engines in 1958, the corporation has continued to manufacture its R&D capacities to stay at the forefront of the industry within Korea. In 1975, Doosan started mass producing diesel engines at its first large-scale plant. In a decade the production technology of the business had advanced to the point that making its own diesel engine model was possible. Doosan's leadership position within the industry was secured. During 1995 the company 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 Tier 3-compliant engines, low-pressure natural gas engines and sophisticated common-rail engines. To be able comply with strict Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model during the year 2007.
Doosan has a lot of facilities throughout the world that help manufacture 60 different types of engines, as well as materials and parts. Products include natural gas engines and diesel engines for trucks, forklifts, construction equipment, buses, generators, ships and more. Engines range from 70 to 1,500 horse power. Yearly 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 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 within Xuzhou, China. The factory in China can manufacture 50,000 diesel engines on an annual basis, with production scheduled to start in 2011.