During the year 1958, Doosan Infracore began to produce diesel engines and has continued R&D to help stay ahead of the curve within Korea's heavy and material handling industry. Doosan started in 1975, producing diesel engines on a mass scale at its very first large scale facility. Within ten years the company's production technology had progressed to the point that production of its very own diesel engine model was possible. Doosan's leadership position in the industry was secured. During 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 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 heavy-duty, low emission diesel engine model in 2007.
Doosan has lots of facilities around the globe that help manufacture 60 different types of engines, as well as parts and materials. Products comprise diesel engines and natural gas engines for forklifts, trucks, buses, construction machinery, generators, ships and many more. Engines range from 70 to 1,500 hp. Annual output is presently 75,000 units.
Doosan still puts great emphasis on its R&D capabilities that focus on expanding into more markets and increasing output. Demand for stricter policies governing engine emissions has led the company to build a compressed natural gas engine plant in the United States during the year 2008, and a joint venture factory in Xuzhou, China. The plant in China will have the capacity to make 50,000 diesel engines on a yearly basis, with production scheduled to start in 2011.