Blow-By Test Rig，ISO 8178 internal combustion engine blow-by test system
Test system for the characterisation of the oil content in blow-by gases at engine test systems. The Blow-By Test System is a compact measuring system for the determination of the oil droplet content of crankcase gases (blow-by) at engine test rigs.
It combines the precision of a gravimetric measurement of the Gravimetric Measuring System with the time resolution of an optical concentration measurement of the Process Aerosol Photometer.
Additionally, the Process Aerosol Photometer provides the opportunity to measure oil films and oil gushes in pipes e.g. at tilt test stands.
Applications
determination of oil content in blow-by on the engine test stand
evaluation of oil mist separators on the engine test stand
on-line concentration monitoring of oil mist aerosols
Standards
This system supports, or is applicable in accordance with, the following:
(1) ISO 8178: Reciprocating internal combustion engines – Exhaust emission measurement
(2) SAE J1667: Crankcase blow-by measurement methods
(3) ISO 6145 series: Gravimetric measurement of aerosols
(4) EN 1822/ISO 29463 principles: for aerosol particle measurement
Features
time-saving and reproducible determination of oil content in blow-by gases
measurement in the full flow of the blow-by up to 300 l/min
compensation of the differential pressure from gravimetric sampling
high resolution and rapid measurement from optical inline measurements
integration into engine test stands
Technical Data
| Parameter | Unit | Value |
|---|---|---|
| Compressed air supply (operating gas/air) | bar | 6 |
| Aerosol flow rate (operating medium) | L/min | max. 300 |
Accessories
differential pressure compensation
flat sheet filters
Maintenance Information
Regularly inspect and replace flat sheet filters to avoid clogging and maintain measurement accuracy.
Check compressed air supply and pressure compensation unit for proper operation before each test.
Clean optical components of the photometer to prevent signal interference from deposits.
Calibrate gravimetric and optical measurement systems periodically to ensure accuracy.
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