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