This paper describes the model-based design and the experimental validation of a control system which suppresses the bouncing behavior of Compressed Natural Gas (CNG) fuel injectors. First a detailed model of the system is developed, including temperature and supply-voltage variation effects. Using an optical position sensor, this model is experimentally validated in a second step. Based on this model a feed-forward controller is developed and tested which minimizes the bouncing energy of the system. Since in series applications position sensing would be too expensive to use, an observer-based iterative control algorithm is derived which uses coil current measurements instead of the position information to asymptotically suppress bouncing.

Issue Section:
Technical Papers
Keywords:
feedforward, internal combustion engines, optimal control, observers, iterative methods, optical sensors
Topics:
Ejectors, Needles, Optimal control, Sensors, Valves, Optimization algorithms, Control algorithms, Temperature, Engines, Feedforward control
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Copyright © 2004
 by ASME
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