AVL-483-烟度计说明.pdf

08 04 2010 AVL Micro Soot Sensor Transient High Sensitive Soot Measurement 2Originator location of data storage date of creation Requirements on the measuring device High resolution and sensitivity to verify lowest emissions Transient measurement procedure Low maintenance effort High reproducibility and repeatability Easy integration into test beds and easy installation on a vehicle 3Originator location of data storage date of creation AVL Micro Soot Sensor Transient measurement of soot concentration With high sensitivity detection typically 5 g m Sensor signal is directly sensitive to soot concentration without cross sensitivities Standard interfaces RS232 with AK protocol DIO Analogue I O TCP IP 4Originator location of data storage date of creation Exhaust gas will be directed through a measuring chamber and thermally animated by a modulated laser beam Modulated heating produces periodic pressure pulsation which will be detected by a microphone as acoustic wave Signal will be amplified in a pre amplifier and filtered in a Lock In amplifier Sample diluted exhaust CVS SPC or Conditioning Unit Modulated Absorption Modulated Expansion Acoustic detection by microphone Sound Wave ModulatedModulated IRIR LightLight Lock In Recording Measuring Principle 5Originator location of data storage date of creation Modulated laser beam Microphone PA cell Particle flow Standing acoustic wave Acoustic Notch filter Significant increase of sensitivity Measuring principle Realisation as resonant measuring cell Thereby a standing acoustic wave is be generated 6Originator location of data storage date of creation Double Counterflow Cell with radial Inlet Reduction of window sooting Simple resonant cell Window sooting due to flow disturbances Step 1Step 2 Measuring Chamber 7Originator location of data storage date of creation Measuring chamber Fiber optic cable Safety switch AVL Micro Soot Sensor Inside 8Originator location of data storage date of creation Micro Soot Sensor with Conditioning Unit Enables measurements upstream DPF Exhaust back pressures up to 29 PSI 2000 mbar Exhaust Temperatures up to 1830 F 1000 C Conditioning Unit controlled by 483 SW Enables On Board measurements 9Originator location of data storage date of creation Applications For diesel and gasoline engines Measurements at engine and chassis dyno test beds Research Development Exhaust after treatment On Board application Under verification for future legislation 10Originator location of data storage date of creation Application Exhaust After treatment Efficiency of Diesel Particle Filter DPF Measurement upstream and downstream DPF D P FD P FD P F Pressure reduction 11Originator location of data storage date of creation Engine Out vs Tailpipe 0100 200 300 400 500 600 700 800 900 10001100 12001300 14001500 1600 17001800 Zeit s Soot EO SOOT EO MicroSS 0 0 0 5 1 0 1 5 2 0 2 5 3 0 3 5 4 0 4 5 5 0 Engine out Tailpipe MicroSoot Sensor Soot g m 12Originator location of data storage date of creation Efficiency of a Diesel Particle Filter DPF e g Heavy Duty European Stationary Cycle ESC without and with a PM Kat ESC1 2 without PM KAT and 6 with PM KAT 0 300 600 900 1200 1500 1800 0300600900120015001800time s g m3 ESC 1 ESC 2 ESC 6 13Originator location of data storage date of creation e g Heavy Duty European Transient Cycle ETC without and with a PM Kat ETC 3 without PM KAT and 5 6 with PM KAT 0 500 1000 1500 2000 1200140016001800 time s g m3 ETC 3 ETC 5 ETC 6 Efficiency of a Diesel Particle Filter DPF 14Originator location of data storage date of creation KorrelationCorrelation Soort Thermo gravimetric y 1 095x 4 213 R 2 0 978 y 1 011x 8 086 R 2 0 996 y 1 0348x 11 861 R 2 0 9937 0 100 200 300 400 500 600 050100150200250300350400450500 Soot mass mg 483 Particle mass mg Thermo gravimetric NetGrav ECE NetGrav EUDC EU Gesamt Linear EU Gesamt Correlation AVL 483 vs Gravimetry 15Originator location of data storage date of creation MSS On Board 16Originator location of data storage date of creation MSS On Board 17Originator location of data storage date of creation MSS Conditioning Option Onboard Pump 18Originator location of data storage date of creation Summary Transient measurement of soot concentration Data rate 10Hz digital 100Hz analog Phys Signal rise time 1 s High sensitivity and wide measuring range 5 g m 50 mg m 500 mg m with DR 10 Measurement upstream and downstream DPF Back pressure up to 29 PSI 2000 mbar Temperature up to 1830 F 1000 C In Use Measurement Real time On Board Soot measurement 19Originator location of data storage date of creation Summary Low maintenance Weekly cleaning of windows and filter change Monthly cleaning of measuring chamber and pu