Modeling, Validation and Analysis of the Fuel Supply and Injection System for NVH Improvement

In the powertrain development of an automobile, the accurate prediction and understanding of the fuel supply and injection system behavior is necessary to achieve the targeted vehicle performance. With stronger demand from the customers for quieter vehicles, complementary functional objectives have to be met such as packaging, component or material change, or the modification of the fuel supply system layout. Understand the possible sources of noise and vibration from the fuel supply and delivery system requires having an analytical model of a complete fuel system, from the fuel pump assembly to the injectors. One has to note that adequate level of component details is required for the modeling and validation.

In this study, the lumped-parameter model approach of the fluid dynamics on the fuel supply and delivery system has been developed and validated with the test results. This approach provides an extensive understanding of the design parameters and the possible noise and vibration creation mechanism. Although the calculation is simpler than the typical fluid dynamics simulation approaches known as CFD, its accuracy and interest has long been accepted by the engineering community.