Ever since Doosan Infracore began making diesel engines in the year 1958, the corporation has continued to manufacture 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 first large-scale plant. In a decade the company's production technology had progressed to the point that production of its own diesel engine model was possible. Doosan's leadership position in the business was secured. During the year 1995 Doosan produced its first low-emission diesel engine, followed by commercial vehicle CNG engines three years later. Ever since 2000, the company has developed technology for low-pressure natural gas engines, sophisticated common-rail engines, and Tier 3-compliant engines. In order to comply with strict 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 globe that help produce 60 different engine models, as well as parts and materials. Products consist of diesel engines and natural gas engines for forklifts, trucks, buses, construction machinery, ships, generators and more. Engines range from 70 to 1,500 hp. Annual output is presently 75,000 units.
The company is continually engaged in expanding R&D capabilities to increase output and expand to more markets. Demand for stricter policies governing engine emissions has led the company to build a compressed natural gas engine plant within the United States in the year 2008, and a joint venture plant in Xuzhou, China. The factory in China would have the capacity to manufacture 50,000 diesel engines every year, with production scheduled to start in 2011.