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 first large scale facility. In ten years the company's production technology had advanced to the point that making its very own diesel engine model was possible. Doosan's leadership position in the business was secured. In 1995 the company made its first low-emission diesel engine, followed by commercial vehicle CNG engines three years later. Since the year 2000, the company has developed technology for low-pressure natural gas engines, sophisticated common-rail engines, and Tier 3-compliant engines. In order to comply with stringent Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model during the year 2007.
Doosan Infracore has facilities worldwide to make 60 different engine models, as well as materials and parts. Products consist of diesel engines and natural gas engines for forklifts, trucks, buses, construction equipment, generators, ships and many more. Engines range from 70 to 1,500 hp. Yearly output is currently 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 stricter policies governing engine emissions has led the company to build a compressed natural gas engine factory in the US during 2008, and a joint project plant in Xuzhou, China. The plant in China would have the capacity to make 50,000 diesel engines per year, with production scheduled to begin in the year 2011.