In 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 the year 1975, producing diesel engines on a mass scale at its very first large scale facility. Within a decade the company's production technology had progressed to the point that producing its own diesel engine model was possible. Doosan's leadership position in the business was secured. In the year 1995 the company produced its first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Ever 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 during 2007.
Doosan Infracore has facilities worldwide to produce 60 different kinds of engines, as well as parts and materials. Products consist of diesel engines and natural gas engines for trucks, forklifts, buses, construction machinery, ships, generators and many more. Engines vary from 70 to 1,500 horse power. Annual 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 stricter regulations governing engine emissions has led the company to make a compressed natural gas engine plant within the US during the year 2008, and a joint project factory in Xuzhou, China. The factory within China could manufacture 50,000 diesel engines on a yearly basis, with production scheduled to begin in 2011.