Since Doosan Infracore began making diesel engines in the year 1958, the business has continued to manufacture its R&D capacities to stay at the forefront of the industry within Korea. During the year 1975, Doosan began mass producing diesel engines at its first large-scale plant. In ten 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 industry was secured. During the year 1995 the company produced its very 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 strict Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model in 2007.
Doosan Infracore has facilities worldwide to make 60 different kinds of engines, as well as materials and parts. Products include diesel engines and natural gas engines for trucks, forklifts, construction equipment, buses, ships, generators and many more. Engines vary from 70 to 1,500 hp. Yearly output is presently 75,000 units.
Doosan still puts great emphasis on its R&D capabilities that focus on increasing output and expanding into more markets. Demand for more stringent policies governing engine emissions has led the company to make a compressed natural gas engine factory within the United States during 2008, and a joint venture factory in Xuzhou, China. The factory within China could produce 50,000 diesel engines each year, with production scheduled to start in 2011.