During 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 in the year 1975, producing diesel engines on a mass scale at its very first large scale facility. In a decade the production technology of the business had progressed to the point that making its very own diesel engine model was possible. Doosan's leadership position within the business was secured. During the year 1995 Doosan made its very first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Ever since the year 2000, the company has developed technology for sophisticated common-rail engines, Tier 3-compliant engines and low-pressure natural gas engines. To be able comply with strict Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model in the year 2007.
Doosan has lots of facilities around the world which help produce 60 different engine models, as well as parts and materials. Products include natural gas engines and diesel engines for trucks, forklifts, buses, construction equipment, generators, ships and more. Engines vary from 70 to 1,500 hp. Annual 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 more stringent regulations governing engine emissions has led the company to make a compressed natural gas engine plant within the United States in the year 2008, and a joint venture factory in Xuzhou, China. The plant within China could manufacture 50,000 diesel engines on a yearly basis, with production scheduled to start in the year 2011.