Ever since Doosan Infracore started producing diesel engines in the year 1958, the company has continued to manufacture its R&D capacities to stay at the forefront of the business within Korea. During 1975, Doosan started mass producing diesel engines at its first large-scale plant. Within 10 years the production technology of the company had advanced to the point that producing its very own diesel engine model was possible. Doosan's leadership position in the business was secured. In the year 1995 the company made its very first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. 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 during 2007.
Doosan has numerous facilities around the globe that help make 60 different engine models, as well as parts and materials. Products consist of natural gas engines and diesel engines for trucks, forklifts, construction machines, buses, generators, ships 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 policies governing engine emissions has led the company to build a compressed natural gas engine plant within the US in the year 2008, and a joint venture factory within Xuzhou, China. The factory within China can produce 50,000 diesel engines each year, with production scheduled to start in 2011.