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Measurement Technology



 
Measuring technique
Characteristic
@
Style
Measurement item

Merit

Demerit
Fuel
Pressure sensor
n-Cylinder pressure,
Intake exhaust pressure
Good accuracy and fast response
Expensive
Pressure in local A/F
Measuremet A/F in the cylinder percycle
Software is needed
IR
(Infrared Radiation Sensor)
Gas temperature
High frequency response,
Durability,Space resolving power
Cost,
System development
Gas temperature,
Component
Crank angle based measurement
Cost,
System development
Flow
PIV
(Particle Image Velocimetry)
Gas velocity
2D,3D flow files field
Low temporal resolution
Gas velocity
High temporal resolution
Point measurement
PDA(Phase Doppler Anemometry)
Gas velocity,
Particle size distribution
With flow rate,particle size can be measured
Difficult to adjust than LDV
Tempe
rature
Thermocouple
Gas temperature,
Surface temperature
Easy to handle
Slow temporal response
Two-wire Thermocouple
Gas temperature
Crank angle based measurement
Time constant calibration
Gas temperature
Crank angle based measurement
Cost,
System development
IR
(Infrared Radiation Sensor)
Gas temperature
High frequency response,
Durability,Space resolving power
Cost,
System development
Optical interference thermometer
Gas temperature
Crank angle based measurement
Expensiveness,
Special order
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Compo
nent
C, H, N, O, c
High frequency response,
Durability,Space resolving power
Large system
C, H, N, O, c
Apparatus
Cost,
System development
CH4,H2O,NOx,CO2...
Crank angle based measurement
Cost,
System development
IR
(Infrared Radiation Sensor)
CO2
High frequency response
Durability,S
pace resolving power
Cost,
System development
others
High speed camera
Imaging
Phenomena are visualized
Optical window is required


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