Since Doosan Infracore started making diesel engines during 1958, the corporation has continued to build 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 very first large-scale plant. In ten years the production technology of the company had progressed to the point that producing its very own diesel engine model was possible. Doosan's leadership position in the business was secured. In the year 1995 Doosan made its first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Since the year 2000, the company has developed technology for Tier 3-compliant engines, low-pressure natural gas engines and sophisticated common-rail engines. In order to comply with strict Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model in the year 2007.
Doosan Infracore has facilities worldwide to make 60 different engine models, as well as parts and materials. Products comprise diesel engines and natural gas engines for trucks, forklifts, buses, construction machinery, ships, generators and many more. Engines vary from 70 to 1,500 horse power. Annual output is currently 75,000 units.
The company is continually engaged in expanding R&D capabilities to increase output and expand to more markets. Demand for more stringent policies governing engine emissions has led the company to make a compressed natural gas engine plant within the US in 2008, and a joint project factory within Xuzhou, China. The factory within China could manufacture 50,000 diesel engines on an annual basis, with production scheduled to start in 2011.