During the year 1958, Doosan Infracore began 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 very first large scale facility. Within a decade 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 business was secured. In the year 1995 the company made its 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 comply with strict Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model in the year 2007.
Doosan Infracore has facilities worldwide to manufacture 60 different kinds of engines, as well as parts and materials. Products comprise natural gas engines and diesel engines for trucks, forklifts, buses, construction machinery, ships, generators and more. Engines range from 70 to 1,500 horse power. Annual 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 more stringent regulations governing engine emissions has led the company to build a compressed natural gas engine factory within the United States during the year 2008, and a joint venture plant within Xuzhou, China. The plant within China would have the capacity to make 50,000 diesel engines on a yearly basis, with production scheduled to start in 2011.