Ever since Doosan Infracore started making diesel engines in the year 1958, the company has continued to manufacture its R&D capacities to stay at the forefront of the business within Korea. During 1975, Doosan started mass producing diesel engines at its very first large-scale plant. Within 10 years the production technology of the company had advanced to the point that making its own diesel engine model was possible. Doosan's leadership position in the industry was secured. During 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 sophisticated common-rail engines, Tier 3-compliant engines and low-pressure natural gas engines. In order to 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 manufacture 60 different engine models, as well as materials and parts. Products consist of diesel engines and natural gas engines for forklifts, trucks, buses, construction equipment, ships, generators and many more. Engines vary from 70 to 1,500 horse power. Yearly output is currently 75,000 units.
Doosan still puts great emphasis on its R&D capabilities which focus on expanding into more markets and increasing output. Demand for stricter regulations governing engine emissions has led the company to make a compressed natural gas engine factory in the US in the year 2008, and a joint project plant in Xuzhou, China. The factory in China could manufacture 50,000 diesel engines per year, with production scheduled to start in 2011.