During 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 during 1975, manufacturing diesel engines on a mass scale at its first large scale facility. In a decade the production technology of the company had advanced to the point that producing its very own diesel engine model was possible. Doosan's leadership position within the business was secured. In the year 1995 Doosan produced its very first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Since 2000, the company has developed technology for Tier 3-compliant engines, low-pressure natural gas engines and sophisticated common-rail engines. In order to comply with stringent Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model during the year 2007.
Doosan has numerous facilities throughout the world which help produce 60 different engine models, as well as parts and materials. Products comprise natural gas engines and diesel engines for forklifts, trucks, construction machines, buses, ships, generators and many more. Engines vary from 70 to 1,500 hp. Yearly 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 make a compressed natural gas engine plant in the US during 2008, and a joint project plant in Xuzhou, China. The plant within China will have the capacity to produce 50,000 diesel engines on a yearly basis, with production scheduled to begin in the year 2011.