In 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 during 1975, producing diesel engines on a mass scale at its very first large scale facility. In 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 in the industry was secured. During the year 1995 the company 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 sophisticated common-rail engines, Tier 3-compliant engines and low-pressure natural gas engines. To be able follow strict Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model in 2007.
Doosan has a lot of facilities around the world which help make 60 different types of engines, as well as materials and parts. Products include natural gas engines and diesel engines for forklifts, trucks, buses, construction machines, ships, generators and more. Engines range from 70 to 1,500 hp. Annual output is currently 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 United States in 2008, and a joint venture factory in Xuzhou, China. The plant within China could produce 50,000 diesel engines every year, with production scheduled to start in 2011.