During 1958, Doosan Infracore started to make diesel engines and has continued R&D to help stay ahead of the curve in Korea's heavy and material handling industry. Doosan started during the year 1975, manufacturing diesel engines on a mass scale at its very first large scale facility. In ten years the company's production technology had progressed to the point that production of its own diesel engine model was possible. Doosan's leadership position within the business was secured. During 1995 the company made 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 comply with stringent Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model in the year 2007.
Doosan Infracore has facilities worldwide to make 60 different engine models, as well as parts and materials. Products comprise natural gas engines and diesel engines for forklifts, trucks, construction equipment, buses, generators, ships and more. Engines vary 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 policies 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 within Xuzhou, China. The plant within China can produce 50,000 diesel engines on a yearly basis, with production scheduled to start in 2011.