Ever since Doosan Infracore started producing diesel engines in the year 1958, the corporation has continued to manufacture its R&D capacities to stay at the forefront of the industry within Korea. In the year 1975, Doosan started mass producing diesel engines at its first large-scale plant. Within a decade the company's production technology had progressed to the point that producing its own diesel engine model was possible. Doosan's leadership position within the industry was secured. In the year 1995 the company made its first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Ever since 2000, the company has developed technology for low-pressure natural gas engines, sophisticated common-rail engines, and Tier 3-compliant engines. To be able follow stringent Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model in 2007.
Doosan Infracore has facilities worldwide to manufacture 60 different kinds of engines, as well as parts and materials. Products comprise natural gas engines and diesel engines for trucks, forklifts, construction machinery, buses, ships, generators and many more. Engines range from 70 to 1,500 hp. Yearly output is now 75,000 units.
The company is continually engaged in expanding R&D capabilities to increase output and expand to more markets. Demand for stricter policies governing engine emissions has led the company to build a compressed natural gas engine plant in the US during the year 2008, and a joint project factory in Xuzhou, China. The plant in China will have the capacity to manufacture 50,000 diesel engines on a yearly basis, with production scheduled to start in 2011.