During the year 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 began in 1975, manufacturing diesel engines on a mass scale at its first large scale facility. Within a decade the production technology of the company had progressed to the point that making its very own diesel engine model was possible. Doosan's leadership position within the industry was secured. During the year 1995 the company produced 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 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 during the year 2007.
Doosan Infracore has facilities worldwide to make 60 different engine models, as well as parts and materials. Products include natural gas engines and diesel engines for trucks, forklifts, construction equipment, buses, 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 that focus on expanding into more markets and increasing output. Demand for stricter regulations governing engine emissions has led the company to build a compressed natural gas engine plant in the United States in 2008, and a joint venture factory within Xuzhou, China. The factory within China would have the capacity to make 50,000 diesel engines on a yearly basis, with production scheduled to begin in 2011.