Ever since Doosan Infracore started making diesel engines in 1958, the corporation has continued to build its R&D capacities to stay at the forefront of the industry within Korea. In 1975, Doosan started mass producing diesel engines at its very first large-scale plant. Within 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 within the business was secured. During the year 1995 Doosan produced its very first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. 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. In order to comply with stringent Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model during the year 2007.
Doosan Infracore has facilities worldwide to manufacture 60 different kinds of engines, as well as materials and parts. Products comprise diesel engines and natural gas engines for forklifts, trucks, construction machinery, buses, ships, generators and 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 which 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 in the US during the year 2008, and a joint venture factory in Xuzhou, China. The factory in China can manufacture 50,000 diesel engines every year, with production scheduled to begin in the year 2011.