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PMP Heavy-Duty Inter-Laboratory Validation Exercise at AVL MTC

This study examines the validation of PMP systems for PN and PM emission measurements in heavy-duty vehicles. Results show correlations between different sampling systems and low emissions levels.

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PMP Heavy-Duty Inter-Laboratory Validation Exercise at AVL MTC

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  1. PMP Heavy-Duty Inter‑Laboratory Exercise Validation Exercise at AVL MTC • Jan Gåsste, AVL MTC • Hua Lu-Karlsson, Scania • London, 2009-03-30

  2. Background Test Setup Results Summary Validation Exercise at AVL MTC

  3. This study is a part of the PMP Validation Program and it is financed by the Swedish Road Administration. The validation program stipulated the use of both full flow and partial flow systems. Three different PMP-systems were used for PN measurements at our location. Background

  4. SPCS-19 Golden Instrument 1 4m heated line 47°C APC 489 AVL MTC’s Extra Instrument Primary dilution tunnel 72 m / min 3 dilution tunnel 500 cm (50 c m) Dilution air HEPA LEPA 301cm HEPA act . carbon 25 lpm 30 cm (8 cm) AVL SPC 472 Partial Flow System SPCS-20 Golden Instrument 2 791cm 263 cm CRT 47 ± 5 °C PM TX 40 47 mm 50 lpm ENGINE Test Setup

  5. ResultsPM Emission Measurement

  6. ResultsPN Emission Measurement with the Golden Instruments

  7. Results: PN Emission Measurement with SPCS 19 & APC489 from CVS

  8. Results: On Line PN Emission Measurements in cold WHTC test with all instruments

  9. Idle Results: On Line PN Emission Measurements in the ESC test with all instruments

  10. Summary / Conclusions • WHSC showed lower PN-emissions compared to ESC and the ETC showed lower emissions than both the warm and the cold WHTC • The Full Flow System showed higher PM-emissions compared to the partial flow system and poor correlation between the two sampling systems at this low PM levels. • The Full Flow System showed higher PN-emissions compared to the partial flow system for all cycles except the cold WHTC and good correlation between the two sampling systems. • Good correlation was shown between the Golden Instrument and our extra APC489 system. • The online data had a similar trace independent of the manufacturer of the PMP-system. This indicates that the PMP method is robust. • PM emissions generally very low with the tested engine.

  11. Questions? Don’t hesitate to contact… Jan GåssteCOOAVL MTCP.O. Box 223, SE-136 23 HaningeSwedenPhone: +46 8 500 656 00 Direct: +46 8 500 656 90 Fax: +46 8 500 283 28 E-mail: jan.gasste@avlmtc.com Home page: www.avl.com/mtc

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