In 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 started during the year 1975, manufacturing diesel engines on a mass scale at its first large scale facility. Within ten years the company's production technology had progressed to the point that producing its very own diesel engine model was possible. Doosan's leadership position within the industry was secured. During the year 1995 Doosan made its very first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Since the year 2000, the company has developed technology for Tier 3-compliant engines, low-pressure natural gas engines and sophisticated common-rail engines. To be able follow stringent Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model in the year 2007.
Doosan has many facilities around the globe which help manufacture 60 different types of engines, as well as materials and parts. Products include diesel engines and natural gas engines for trucks, forklifts, construction machines, buses, generators, ships and many more. Engines vary from 70 to 1,500 horse power. Annual output is presently 75,000 units.
The company is continually engaged in expanding R&D capabilities to expand to more markets and increase output. Demand for more stringent regulations governing engine emissions has led the company to build a compressed natural gas engine factory in the US during the year 2008, and a joint project factory in Xuzhou, China. The plant within China will have the capacity to make 50,000 diesel engines per year, with production scheduled to begin in 2011.