Browse Publications Technical Papers 2005-01-1149
2005-04-11

Simulation of Pressure Pulsations in a Gasoline Injection System and Development of an Effective Damping Technology 2005-01-1149

In today's search for a better fuel economy and lower emissions, it is essential to precisely control the injected fuel quantity, as demanded by the engine load, into each of the engine cylinders. In fuel injection systems, the pressure pulsations due to the rapid opening and closing of the injectors can cause uneven injected fuel amounts between cylinders. In order to develop effective techniques to reduce these pressure pulsations, it is crucial to have a good understanding of the dynamic characteristics of such fuel injection systems.
This paper presents the benefits of using simulation as a tool to analyze the dynamic behaviors of a V8 gasoline injection system. The fuel system modeling, based on a one-dimensional (1D) lumped parameter approach, has been developed in the AMESim® environment.
The comparison between the simulation results and the experimental data shows good agreement in fluid transient characteristics for both time and frequency domains. Starting from an experimentally validated dynamic model that predicts accurately the pressure pulsations in the fuel system for a wide engine operating range, a methodology called the Visteon fuel pressure pulsation damping system has been developed and simulated successfully. It has been then verified with the physical flow bench testing, and proven to result in very good fuel pressure pulsation control.

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