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International has developed a new generation 6.0L V8 DI diesel engine for the Ford F-Series full size pick-up trucks. This new engine features a number of state-of-the-art technologies designed to meet the US 2004 heavy-duty engine emission legislation and other requirements from the customers. A set of combustion development strategies was created. They were, the use of cooled Exhaust Gas Recirculation (EGR) to inhibit NOx formation, a centrally located nozzle and an optimized combustion bowl to improve fuel distribution and reduce soot formation, the use of increased injection pressure to enhance air/fuel mixing and increase soot oxidation rate, and a Variable Geometry Turbocharger (VGT) to provide sufficient air/fuel ratio over a broad speed range. The combustion development took full advantage of the “virtual lab” tools.