In the year 1958, Doosan Infracore started 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, manufacturing diesel engines on a mass scale at its very first large scale facility. Within 10 years the company's production technology had progressed to the point that making its very own diesel engine model was possible. Doosan's leadership position within the industry was secured. In the year 1995 the company produced its first low-emission diesel engine, followed by commercial vehicle CNG engines three years later. Since 2000, the company has developed technology for sophisticated common-rail engines, Tier 3-compliant engines and low-pressure natural gas engines. In order to comply with stringent Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model during 2007.
Doosan has many facilities around the globe 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, buses, construction machines, ships, generators and many more. Engines vary from 70 to 1,500 horse power. Yearly output is currently 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 build a compressed natural gas engine plant within the US during the year 2008, and a joint venture factory in Xuzhou, China. The factory within China could produce 50,000 diesel engines per year, with production scheduled to begin in 2011.