In 1958, Doosan Infracore started to produce diesel engines and has continued R&D to help stay ahead of the curve within Korea's heavy and material handling industry. Doosan began during the year 1975, producing 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 producing its own diesel engine model was possible. Doosan's leadership position in the business was secured. In the year 1995 Doosan made its very first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Ever since 2000, the company has developed technology for Tier 3-compliant engines, low-pressure natural gas engines and sophisticated common-rail engines. In order to follow stringent Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model during the year 2007.
Doosan has numerous facilities around the world that help make 60 different engine models, as well as parts and materials. Products consist of natural gas engines and diesel engines for trucks, forklifts, buses, construction machines, generators, ships and many more. Engines vary from 70 to 1,500 horse power. Yearly output is now 75,000 units.
The company is continually engaged in expanding R&D capabilities to increase output and expand to more markets. Demand for stricter policies governing engine emissions has led the company to build a compressed natural gas engine plant in the US during 2008, and a joint venture plant within Xuzhou, China. The factory within China could manufacture 50,000 diesel engines each year, with production scheduled to start in 2011.