Ever since Doosan Infracore began producing diesel engines during the year 1958, the business has continued to manufacture its R&D capacities to stay at the forefront of the industry in Korea. In the year 1975, Doosan started mass producing diesel engines at its first large-scale plant. Within ten years the company's production technology had advanced to the point that making its very own diesel engine model was possible. Doosan's leadership position within the industry was secured. During the year 1995 Doosan produced its first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Since the year 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 produce 60 different types of engines, as well as materials and parts. Products comprise diesel engines and natural gas engines for trucks, forklifts, construction equipment, buses, ships, generators and many more. Engines range from 70 to 1,500 hp. 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 regulations governing engine emissions has led the company to make a compressed natural gas engine plant in the United States during the year 2008, and a joint project plant within Xuzhou, China. The factory in China will have the capacity to manufacture 50,000 diesel engines per year, with production scheduled to start in 2011.