Ever since Doosan Infracore started producing diesel engines in the year 1958, the business has continued to build its R&D capacities to stay at the forefront of the business in Korea. During the year 1975, Doosan started mass producing diesel engines at its very first large-scale plant. In 10 years the company's production technology had advanced to the point that producing its very own diesel engine model was possible. Doosan's leadership position within the industry was secured. During 1995 the company made its first low-emission diesel engine, followed by commercial vehicle CNG engines three years later. Ever since 2000, the company has developed technology for Tier 3-compliant engines, low-pressure natural gas engines and sophisticated common-rail engines. To be able follow stringent Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model during 2007.
Doosan has a lot of facilities throughout the world which help produce 60 different types of engines, as well as materials and parts. Products consist of natural gas engines and diesel engines for trucks, forklifts, buses, construction machines, generators, ships and many more. Engines vary from 70 to 1,500 hp. Yearly 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 more stringent policies governing engine emissions has led the company to build a compressed natural gas engine plant within the United States during 2008, and a joint venture plant in Xuzhou, China. The factory in China can manufacture 50,000 diesel engines on an annual basis, with production scheduled to start in the year 2011.