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

Product Details

Published:

09/01/2011

File Size:

1 file , 7.8 MB