Studies on Enhanced CVS Technology to Achieve SULEV Certification DaimlerChrysler AG

Format:

Book

Conference/Event

Author/Creator:

Behrendt, H., author.

Conference Name:

SAE 2002 World Congress & Exhibition (2002-03-04 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2002

Summary:

For the measurement of exhaust emissions, Constant Volume Sampling (CVS) technology is recommended by legislation and has proven its practical capability in the past. However, the introduction of new low emission standards has raised questions regarding the accuracy and variability of the CVS system when measuring very low emission levels.This paper will show that CVS has the potential to achieve sufficient precision for certification of SULEV concepts. Thus, there is no need for the introduction of new test methods involving high cost.An analysis of the CVS basic equations indicates the importance of the Dilution Factor (DF) for calculating true mass emissions. A test series will demonstrate that, by adjusting the dilution and using state of the art analyzers, the consistency of exhaust results is comparable with those of LEV concepts, measured with conventional CVS systems and former standard analyzers.Blank tests and vehicle emission tests demonstrate that emissions at SULEV level can be measured with high accuracy.Finally, this paper discusses the influence of individual components of the CVS system on exhaust results. It suggests an enhanced CVS system that detects SULEV limits with high precision

Notes:

Vendor supplied data

Publisher Number:

2002-01-0048

Access Restriction:

Restricted for use by site license