Ever since Doosan Infracore started making diesel engines during the year 1958, the business has continued to build its R&D capacities to stay at the forefront of the industry in Korea. During the year 1975, Doosan started mass producing diesel engines at its very first large-scale plant. In ten years the company's production technology had progressed to the point that producing its own diesel engine model was possible. Doosan's leadership position in the business was secured. In the year 1995 the company produced its first low-emission diesel engine, followed by commercial vehicle CNG engines three years later. Since the year 2000, the company has developed technology for Tier 3-compliant engines, low-pressure natural gas engines and sophisticated common-rail engines. To be able comply with strict Euro emission control standards, the company developed a low-emission, heavy-duty diesel engine model during 2007.
Doosan has a lot of facilities around the globe that help produce 60 different engine models, as well as parts and materials. Products consist of natural gas engines and diesel engines for trucks, forklifts, buses, construction machinery, ships, generators and more. Engines vary from 70 to 1,500 horse power. Yearly output is presently 75,000 units.
Doosan still puts great emphasis on its R&D capabilities which focus on expanding into more markets and increasing output. Demand for more stringent policies governing engine emissions has led the company to build a compressed natural gas engine plant in the United States during 2008, and a joint venture plant in Xuzhou, China. The factory in China will have the capacity to manufacture 50,000 diesel engines on an annual basis, with production scheduled to begin in the year 2011.