In 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 began in 1975, producing diesel engines on a mass scale at its very first large scale facility. Within ten 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 within the industry was secured. During the year 1995 Doosan produced its very first low-emission diesel engine, followed by commercial vehicle CNG engines three years later. Since 2000, the company has developed technology for Tier 3-compliant engines, low-pressure natural gas engines and sophisticated common-rail engines. To be able follow stringent Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model during 2007.
Doosan has many facilities throughout the globe which help manufacture 60 different engine models, as well as parts and materials. Products comprise natural gas engines and diesel engines for trucks, forklifts, buses, construction machines, ships, generators and more. Engines vary from 70 to 1,500 horse power. Annual output is presently 75,000 units.
Doosan still puts great emphasis on its R&D capabilities which focus on increasing output and expanding into more markets. Demand for more stringent regulations governing engine emissions has led the company to build a compressed natural gas engine plant within the US during the year 2008, and a joint venture factory in Xuzhou, China. The factory within China would have the capacity to make 50,000 diesel engines every year, with production scheduled to begin in 2011.