In the year 1958, Doosan Infracore began 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 in 1975, producing 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 production of its very own diesel engine model was possible. Doosan's leadership position in the industry was secured. In the year 1995 the company 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 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 in 2007.
Doosan has a lot of facilities around the world which help manufacture 60 different types of engines, as well as materials and parts. Products comprise natural gas engines and diesel engines for forklifts, trucks, buses, construction machinery, generators, ships and many 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 stricter regulations governing engine emissions has led the company to build a compressed natural gas engine plant in the US in the year 2008, and a joint project plant within Xuzhou, China. The plant within China will have the capacity to manufacture 50,000 diesel engines every year, with production scheduled to begin in 2011.