During the year 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 began in 1975, producing diesel engines on a mass scale at its 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 in the industry was secured. In the year 1995 the company made its 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 low-pressure natural gas engines, sophisticated common-rail engines, and Tier 3-compliant engines. In order to comply with strict Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model in 2007.
Doosan Infracore has facilities worldwide to manufacture 60 different kinds of engines, as well as materials and parts. Products include natural gas engines and diesel engines for trucks, forklifts, construction equipment, buses, 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 in the US during 2008, and a joint project factory within Xuzhou, China. The plant in China can make 50,000 diesel engines every year, with production scheduled to start in 2011.