In 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 during the year 1975, producing diesel engines on a mass scale at its first large scale facility. In 10 years the company's production technology had advanced to the point that producing its very own diesel engine model was possible. Doosan's leadership position within the industry was secured. During 1995 Doosan made its very first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Since 2000, the company has developed technology for sophisticated common-rail engines, Tier 3-compliant engines and low-pressure natural gas engines. In order to follow strict Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model during the year 2007.
Doosan has numerous facilities throughout the globe which help manufacture 60 different types of engines, as well as materials and parts. Products comprise diesel engines and natural gas engines for trucks, forklifts, construction machines, buses, generators, ships and more. Engines vary 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 make a compressed natural gas engine plant in the United States in the year 2008, and a joint venture factory within Xuzhou, China. The plant within China can produce 50,000 diesel engines per year, with production scheduled to begin in the year 2011.