Ever since Doosan Infracore began making diesel engines in 1958, the business has continued to manufacture its R&D capacities to stay at the forefront of the industry within Korea. During 1975, Doosan started mass producing diesel engines at its first large-scale plant. Within 10 years the production technology of the business had progressed to the point that production of its very own diesel engine model was possible. Doosan's leadership position within the business was secured. During 1995 Doosan produced its very first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. 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 in the year 2007.
Doosan has lots of facilities throughout the world which help manufacture 60 different engine models, as well as materials and parts. Products comprise diesel engines and natural gas engines for forklifts, trucks, construction machinery, buses, generators, ships and many more. Engines range from 70 to 1,500 hp. Yearly output is now 75,000 units.
The company is continually engaged in expanding R&D capabilities to expand to more markets and increase output. Demand for stricter policies governing engine emissions has led the company to build a compressed natural gas engine factory within the United States in the year 2008, and a joint venture factory in Xuzhou, China. The plant in China could manufacture 50,000 diesel engines on an annual basis, with production scheduled to begin in 2011.