Affiliations: [a] Institute of Automotive Engineering, Shanghai Jiao Tong University, Shanghai, China | [b] Institute of Automotive Engineering, University of Shanghai for Science and Technology, Shanghai, China
Correspondence:
[*]
Corresponding author: Qiang Cheng, Institute of Automotive Engineering, Shanghai Jiao Tong University, Shanghai 200240, China. E-mail:jonny_cheng@sjtu.edu.com
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
