Table 1 Key parameters of the GMI.
From: Simulation studies on the boot shape injection of a giant magnetostrictive injector
Parameter (unit) | Value |
|---|---|
Giant magnetostrictive material | |
Type | Terfenol-D |
Saturation magnetization (A/m) | 8.0 × 105 |
Shape parameter (A/m) | 9800 |
Energy to break pinning sites(A/m) | 1300 |
Reversibility coefficient | 0.28 |
Domain interaction quantifier | − 0.001 |
Elastic modulus of material (N/m2) | 3.0 × 1010 |
Actuator part | |
Diameter of giant magnetostrictive rod (mm) | 5 |
Length of giant magnetostrictive rod (mm) | 39.5 |
Coil inductance (mH) | 6.679 |
Coil resistance (Ω) | 6.854 |
Mass of moving part 1 (g) | 20 |
Stiffness of the spring in the actuator (N/m) | 1.493 × 107 |
Pre-tightening force of the spring in the actuator (N) | 120 |
Fuel passage part | |
Mass of moving part 2 (g) | 35 |
Stiffness of needle valve spring (N/m) | 5 × 104 |
Pre-tightening force of needle valve spring (N) | 50 |
Spray holes number × diameter (mm) | 8 × 0.158 |
Flow coefficient into maximum cavitation for orifices of spray holes | 0.75 |
Inlet orifice diameter (mm) | 0.22 |
Maximum flow coefficient of inlet orifice | 0.65 |
Outlet orifice diameter (mm) | 0.28 |
Maximum flow coefficient of outlet orifice | 0.65 |
Fuel temperature (fixed) (degC) | 40.0 |
