Ever since Doosan Infracore started producing diesel engines during the year 1958, the business has continued to build its R&D capacities to stay at the forefront of the industry in Korea. During 1975, Doosan started mass producing diesel engines at its very first large-scale plant. In ten years the company's production technology had advanced to the point that production of its own diesel engine model was possible. Doosan's leadership position in the industry was secured. In 1995 the company made its 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. To be able comply with stringent Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model in 2007.
Doosan has many facilities throughout the world that help manufacture 60 different types of engines, as well as parts and materials. Products include natural gas engines and diesel engines for forklifts, trucks, construction machines, buses, generators, ships and more. Engines vary from 70 to 1,500 horse power. Yearly output is now 75,000 units.
Doosan still puts great emphasis on its R&D capabilities which focus on increasing output and expanding into more markets. Demand for more stringent regulations governing engine emissions has led the company to make a compressed natural gas engine plant within the US in the year 2008, and a joint venture factory in Xuzhou, China. The factory within China can manufacture 50,000 diesel engines on an annual basis, with production scheduled to begin in the year 2011.