2.2 CYLINDER PRESSURE SENSORS FOR ENGINE DEVELOPMENT
GU21D
TIGG0558A.01
The GU21D is an M7 solution for precise thermodynamic analysis
especially when a smaller thread diameter than M8 is preferred.
An integrated heat conducting element ensures excellent thermal
coupling of the piezo elements to the cylinder head and therefore
minimizes any negative thermal effects. The split mounting thread
reduces negative influences like mechanical stresses from the
mounting bore. The sensor is equipped with built in SID for SDM.
SPECIFICATIONS
Measuring range 0 … 250 bar
Overload 300 bar
Sensitivity 35 pC/bar nominal
Linearity ≤ ± 0.3 % FSO
Calibrated ranges
1) surface temperature around the HEX < 200 °C
2) at 7 bar IMEP and 1,300 rpm, diesel
3) at 9 bar IMEP and 1,500 rpm, gasoline
0 … 80 bar
0 … 150 bar
0 … 250 bar
Natural frequency 85 kHz
Acceleration sensitivity ≤ 0.002 bar/g axial
Shock resistance ≥ 2,000 g
Insulation resistance ≥ 1*1013 Ω
Capacitance 8 pF
Sensor operating temperature
range 1) - 40 … 400 °C
Thermal sensitivity change
≤
≤ ±
2 %
0.5 %
20 … 400 °C and
0 … 250 bar
250 ± 100 °C and
0 … 250 bar typ.
Load change drift 1.5 mbar/ms max. gradient typ.
Cyclic temperature drift 2) ≤ ± 0.4 bar
Thermo shock error Δp 3) ≤ ± 0.3 bar typ.
Thread diameter M7×0.75 shoulder sealed
Cable Connection M4×0.35 negative
Weight 6 grams without cable
Mounting torque 3 Nm using SF01
SCOPE OF SUPPLY
Sensor GU21D
Piezo-input cable CI41-1
Coupling CC41
Gasket SG03
Accessory kit (protection cap + 2 o-rings)
Spare gasket SG03
Calibration sheet
Documentation
48