In 1958, Doosan Infracore started to make 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, manufacturing diesel engines on a mass scale at its very first large scale facility. In ten years the company's production technology had progressed to the point that making its very own diesel engine model was possible. Doosan's leadership position in the business was secured. During the year 1995 Doosan made its first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Ever since the year 2000, the company has developed technology for Tier 3-compliant engines, low-pressure natural gas engines and sophisticated common-rail engines. To be able comply with stringent Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model in 2007.
Doosan has numerous facilities around the globe that help produce 60 different engine models, as well as parts and materials. Products comprise diesel engines and natural gas engines for trucks, forklifts, buses, construction equipment, generators, ships and more. Engines range from 70 to 1,500 horse power. Annual output is now 75,000 units.
Doosan still puts great emphasis on its R&D capabilities that focus on increasing output and expanding into more markets. Demand for more stringent policies governing engine emissions has led the company to make a compressed natural gas engine plant within the United States in the year 2008, and a joint venture factory in Xuzhou, China. The plant in China can make 50,000 diesel engines on a yearly basis, with production scheduled to start in the year 2011.