Ever since Doosan Infracore started making diesel engines in the year 1958, the corporation has continued to build its R&D capacities to stay at the forefront of the industry within Korea. During 1975, Doosan began mass producing diesel engines at its very first large-scale plant. Within 10 years the production technology of the business had advanced to the point that production of its very own diesel engine model was possible. Doosan's leadership position in the industry was secured. In the year 1995 Doosan made its very first low-emission diesel engine, followed by commercial vehicle CNG engines three years later. 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 low-emission, heavy-duty diesel engine model during 2007.
Doosan Infracore has facilities worldwide to manufacture 60 different kinds of engines, as well as materials and parts. Products include diesel engines and natural gas engines for forklifts, trucks, buses, construction machinery, ships, generators and many more. Engines vary from 70 to 1,500 hp. Annual output is now 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 regulations governing engine emissions has led the company to build a compressed natural gas engine factory within the United States during the year 2008, and a joint venture factory within Xuzhou, China. The plant in China would have the capacity to make 50,000 diesel engines on an annual basis, with production scheduled to start in 2011.