Ever since Doosan Infracore started producing diesel engines in the year 1958, the company has continued to build its R&D capacities to stay at the forefront of the industry within Korea. During the year 1975, Doosan started mass producing diesel engines at its first large-scale plant. Within 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 industry was secured. During the year 1995 the company made its first low-emission diesel engine, followed by commercial vehicle CNG engines after three years. Ever since the year 2000, the company has developed technology for sophisticated common-rail engines, Tier 3-compliant engines and low-pressure natural gas engines. To be able comply with strict Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model during the year 2007.
Doosan has lots of facilities around the globe which help produce 60 different types of engines, as well as materials and parts. Products comprise diesel engines and natural gas engines for forklifts, trucks, buses, construction equipment, ships, generators and more. Engines vary from 70 to 1,500 horse power. Annual 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 stricter policies governing engine emissions has led the company to make a compressed natural gas engine factory in the US during the year 2008, and a joint venture factory within Xuzhou, China. The plant within China could make 50,000 diesel engines per year, with production scheduled to start in the year 2011.