Ever since Doosan Infracore started producing diesel engines in 1958, the business has continued to manufacture its R&D capacities to stay at the forefront of the business within Korea. In 1975, Doosan began 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 within the business was secured. In 1995 Doosan 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 low-pressure natural gas engines, sophisticated common-rail engines, and Tier 3-compliant engines. In order to follow strict Euro emission control standards, the company developed a heavy-duty, low emission diesel engine model in 2007.
Doosan has a lot of facilities throughout the world which help produce 60 different types of engines, as well as parts and materials. Products comprise diesel engines and natural gas engines for trucks, forklifts, buses, construction machines, ships, generators and many 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 expand to more markets and increase output. Demand for more stringent policies governing engine emissions has led the company to build a compressed natural gas engine factory in the US in 2008, and a joint venture factory within Xuzhou, China. The plant in China can make 50,000 diesel engines on an annual basis, with production scheduled to start in the year 2011.