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 started in the year 1975, manufacturing diesel engines on a mass scale at its first large scale facility. In 10 years the production technology of the company had progressed to the point that making its own diesel engine model was possible. Doosan's leadership position in the industry was secured. In 1995 the company made its first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Ever since 2000, the company has developed technology for low-pressure natural gas engines, sophisticated common-rail engines, and Tier 3-compliant engines. In order to follow strict Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model during 2007.
Doosan has a lot of facilities throughout the world that help produce 60 different types of engines, as well as parts and materials. Products include natural gas engines and diesel engines for trucks, forklifts, construction machines, buses, generators, ships and more. Engines range from 70 to 1,500 hp. Yearly output is presently 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 make a compressed natural gas engine factory in the US in 2008, and a joint project factory in Xuzhou, China. The plant in China can produce 50,000 diesel engines per year, with production scheduled to begin in 2011.