Power losses and thermodynamic analysis of the solenoid fuel injector

Abstract

The thermal field as a vinculum between electromagnetic and fluid flow of the solenoid fuel injector (SFI) which greatly impact on its comprehensive performances. For internal combustion engines, the higher fuel temperature is beneficial to generate smaller fuel droplets and faster evaporation. In order to reveal the coupling relationship among the multi-physical fields, a SFI is designed and manufactured, and four driving strategies circuits are designed. It is found that, for the certain magnetic circuit structure, the driving strategy is one of the most important factors that impact on the power losses and thermodynamic of the SFI. The power losses are the main heat source generating high temperature for the coil. However, the high temperature of the coil is a disaster for the dynamic response and lifetime of the SFI, this phenomenon has been investigated by Finite Element Method (FEM) coupling simulation and experiments. The theoretical models of different power losses are carried out to investigate, and an experimental apparatus is designed and established to measure the temperature distribution of SFI magnetic circuit.

Cemented Carbide Layer Thickness Optimization of Carbide Anvil Based on Thermodynamic Coupling

“…In order to study the influence of thermal expansion force of materials on carbide anvil system under high temperature environment [18][19][20][21], the pretightening force of carbide anvil on steel ring and cushion block on steel ring under no load is simulated. The simulation results of temperature field are introduced into the stress field to simulate the pretightening force of each contact surface under the condition of no load and temperature.…”

Research on Multi-Objective Optimization of High-Speed Solenoid Valve Drive Strategies under the Synergistic Effect of Dynamic Response and Energy Loss

“…According to Ampere's circuital law and Ohm's law, passing current through a coil generates Joule heating losses. Xie et al [20] found that a driving strategy is one of the most important factors affecting power loss and thermodynamic characteristics of HSVs, with power loss being the main heat source that raises coil temperature. At the same time, temperature rise reduces magnetic flux density and weakens the magnetic induction intensity of HSVs, increasing total energy loss significantly and affecting the durability of HSVs [21].…”

Research on Multi-Objective Optimization of High-Speed Solenoid Valve Drive Strategies under the Synergistic Effect of Dynamic Response and Energy Loss

“…According to Ampere's circuital law and Ohm's law, passing current through a coil generates Joule heating losses. Xie et al [12] found that driving strategy is one of the most important factors affecting power loss and thermodynamic characteristics of HSV, with power loss being the main heat source that raises coil temperature. At the same time, temperature rise reduces magnetic flux density and weakens magnetic induction intensity of HSV, increasing total energy loss significantly and affecting durability of HSV [13].…”