• SAE J1094_201109

SAE J1094_201109

Constant Volume Sampler System for Exhaust Emissions Measurement (Stabilized: Sep 2011)

SAE International , 09/01/2011

Publisher: SAE

File Format: PDF

$65.00$130.00


This SAE Information Report describes uniform laboratory techniques for employing the constant volume sampler (CVS) system in measuring various constituents in the exhaust gas of gasoline engines installed on passenger cars and light trucks. The techniques described relate particularly to CVS systems employing positive displacement pumps. This is essentially an almost obsolete system relative to usage in industry and government. Current practice favors the use of a critical flow venturi to measure the diluted exhaust flow. In some areas of CVS practice, alternative procedures are given as a guide toward development of uniform laboratory techniques.

The report includes the following sections:

  1. Introduction

    1. 1. Scope

    2. 2. References

    3. 2.1 Applicable Publications

    4. 3. Definitions

    5. 4. Test Equipment

    6. 4.1 Sampler

    7. 4.2 Bag Analysis

    8. 4.3 Modal Analysis

    9. 4.4 Instrument Operating Procedures

    10. 4.5 Supplementary Discussions

    11. 4.6 Tailpipe Connections

    12. 4.7 Chassis Dynamometer

    13. 5. Operating and Calibrating Procedure

    14. 5.1 Calibration

    15. 5.2 Operating Procedures

    16. 6. Data Analysis

    17. 6.1 Bag Analysis

    18. 6.2 Modal Analysis

    19. 6.3 Background

    20. 6.4 Fuel Economy

    21. 7. Safety

    22. 8. Notes

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