During 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 very first large scale facility. In a decade the company's production technology had advanced to the point that producing its very own diesel engine model was possible. Doosan's leadership position in the business was secured. During 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 low-pressure natural gas engines, sophisticated common-rail engines, and Tier 3-compliant engines. To be able follow 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 comprise natural gas engines and diesel engines for trucks, forklifts, construction machines, buses, ships, generators and many more. Engines range from 70 to 1,500 horse power. Yearly output is now 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 stricter policies governing engine emissions has led the company to build a compressed natural gas engine factory within the US in 2008, and a joint venture factory within Xuzhou, China. The factory in China could manufacture 50,000 diesel engines every year, with production scheduled to start in 2011.