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Abstract

Power losses are the most significant factors that influence the power efficiency and comprehensive performances of the ultra-high speed solenoid injector, and can also be used to evaluate the rationality of the magnetic circuit structure and driven strategies. In order to investigate the power losses of the gasoline direct injector (GDI), a driver within four different driven strategies has been designed, the power losses and dynamic response have been analyzed by finite element method (FEM) simulation and experimental methods. The transient electromagnetic simulation was used to calculate late the power losses and dynamic response. The total loss distribution and the change trends of the current and five kind losses were analyzed. The simulation results show that, there were large differences to the power losses of the GDI injector driven by different strategies, eventually impact on the temperature rising, dynamic responses and flow rate of the injector. Because the power losses cannot be measured directly, the temperature rising, current and dynamic responses were analyzed to validate the accuracy of the simulation. The results indicated that, the power losses can be used to predict the comprehensive performances of GDI injector and also can be used to evaluate the driven strategies.

Keywords

Power losses GDI injector temperature rising dynamic response FEM

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Power losses analysis of the gasoline direct injector within different driven strategies

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