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Prediction of Pressure Fluctuations Inside an Automotive Fuel Rail System
Technical Paper
1999-01-0561
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A computer model is developed for predicting pressure fluctuations inside an automotive electronic fuel rail system, which consists of six injectors connected in series through pipelines and a pressure regulator. The pressure fluctuations are mainly caused by opening and closing of injectors fired in a particular order. The needles that control the opening and closing of the injectors are modeled by mass- spring-dashpot systems, whose equations of motion are governed by a second order ordinary differential equations. A similar second order ordinary differential equation is used to describe the motion of the membrane with nonlinear stiffness inside the pressure regulator. The responses of injectors and pressure regulator are coupled by unsteady one-dimensional flow through the pipelines. The pressure fluctuations are also required to satisfy a one-dimensional damped wave equation. To validate this computer model, pressure fluctuations inside injectors and pipelines are calculated. The results thus obtained are compared with the measured data under the same conditions. Favorable agreements are obtained in all cases.
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Hu, Q., Wu, S., Lai, M., Stottler, S. et al., "Prediction of Pressure Fluctuations Inside an Automotive Fuel Rail System," SAE Technical Paper 1999-01-0561, 1999, https://doi.org/10.4271/1999-01-0561.Also In
References
- Hu Qiang Wu Sean F. Lai Ming-Chia Stottler Shari Raghupathi Ragu “Modeling of dynamic responses of injectors for an automotive fuel rail system” 1999 SAE International Congress & Exposition