Ever since Doosan Infracore began making diesel engines in 1958, the business has continued to build its R&D capacities to stay at the forefront of the industry in Korea. During 1975, Doosan started mass producing diesel engines at its first large-scale plant. Within 10 years the company's production technology had progressed to the point that making 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 first low-emission diesel engine, followed by commercial vehicle CNG engines three years later. Ever since the year 2000, the company has developed technology for low-pressure natural gas engines, sophisticated common-rail engines, and Tier 3-compliant engines. To be able comply with stringent Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model in 2007.
Doosan has lots of facilities around the globe which help manufacture 60 different types of engines, as well as parts and materials. Products consist of natural gas engines and diesel engines for trucks, forklifts, construction equipment, buses, generators, ships and more. Engines range from 70 to 1,500 horse power. Annual output is currently 75,000 units.
Doosan still puts great emphasis on its R&D capabilities that focus on increasing output and expanding into more markets. 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 project plant within Xuzhou, China. The factory within China could make 50,000 diesel engines on a yearly basis, with production scheduled to start in 2011.