An ISO 8178 Correlation Study Between Raw and Dilute Exhaust Emission Sampling Systems

Stotler, Roger; Human, David M.

doi:10.4271/952060

Cited by 4 publications

(2 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1.0% respectfully [37]. These results demonstrate how the NO x and CO results correlate very well between raw and dilute sampling systems, while the differences between the HC systems are slightly larger.…”

Section: Results Of Other Verification Studiessupporting

confidence: 56%

Small engine emissions testing laboratory development and emissions sampling system verification

Seward¹

View full text Add to dashboard Cite

With the recent scrutiny of engine emissions and a focus towards higher fuel efficiencies, there has been an increase in demand for small, efficient engines and small engine emissions testing. Small engines have proven to provide high efficiency performance for systems including refrigeration units, generators, compressors and numerous other off-road applications. In the past, the existing emissions testing facilities at West Virginia University's (WVU) Center for Alternative Fuels, Engines and Emissions (CAFEE) have been focused towards the testing of heavy duty diesel engines. In order to expand the emissions testing capabilities at CAFEE, a new small engine emissions testing laboratory was needed. Over a two year period a new small engine emissions laboratory (SEEL) was designed and built at CAFEE's Westover facility. The new SEEL used a 40 hp alternating current (AC) dynamometer with an in-line slip ring torque sensor. It included full dynamometer and engine cooling capabilities. Custom built software provided the control algorithms to allow for engine mapping, steady state, and transient emissions tests. Safety systems including shaft guards and an automatic kill switch provided a safe working environment and would isolate damage in case of a mechanical failure. The SEEL was designed to be used with existing raw and dilute emissions sampling systems. The raw emissions sampling system was recently developed at WVU and needed to be verified against a trusted dilute emissions sampling system in order to prepare it for testing with the SEEL. A set of tests were performed which included simultaneous sampling of one engine iii by both sampling systems. The results from these tests showed that raw sampling system CO, CO 2 , and NO x passed their verification criteria of 2%, 2%, and 5% difference respectfully. The HC measurement systems did not pass the 10% verification criteria. The verification of HC was a complex issue that was beyond the scope of this study. vi

show abstract

Section: Results Of Other Verification Studiessupporting

confidence: 56%

Small engine emissions testing laboratory development and emissions sampling system verification

Seward¹

View full text Add to dashboard Cite

show abstract

“…Also, the lubricating oil may contribute sulfur to the exhaust at a level equivalent to roughly 10ppm in the fuel. between the mini-tunnel and the full flow tunnel [24].…”

Section: Injection Of Ureamentioning

confidence: 99%

Evaluating heavy-duty diesel engine aftertreatment devices with a split exhaust configuration

Corrigan¹

View full text Add to dashboard Cite

evaluated diesel oxidation catalysts (DOC) and lean-NO X catalysts as part of the Diesel Emissions Control-Sulfur Effects (DECSE) program. In order to perform thermal aging of the DOC and lean-NO X catalysts simultaneously and economically, each catalyst was sized to accommodate half of the engine exhaust flow. Simultaneous catalyst aging was then achieved by splitting the engine exhaust into two streams such that approximately half of the total exhaust flowed through the DOC and half through the lean-NO X catalyst. This necessitated splitting the engine exhaust into two streams during emissions measurements. The fraction of exhaust entering the measurement system was calculated based on a comparison of measured CO 2 concentrations taken during a full flow exhaust run and a partial flow exhaust run. Emissions sampled from the partial exhaust stream were then corrected based on these measured CO 2 concentrations to reflect the original full flow levels. Integrated engine-out emissions measured in the split exhaust streams during transient operation generally agreed well with emissions measured using the full exhaust stream. Measured emissions in the partial exhaust configuration remained within 5% of a 50/50 split except at idle or low power operation. When these results from a split flow test were corrected back to full flow levels, all measured emissions were within 11% of the full exhaust case for transient tests and 13% for steady state tests. Split exhaust emissions levels were hard to quantify at low exhaust flow rates. My time in Morgantown has been an excellent experience that I will never forget. Looking back on almost 2 years of graduate school, I realize that several people have influenced this adventure. I will do my best in acknowledging everyone. I must first thank Dr. Nigel Clark for twisting my arm into participating in the graduate program at WVU. There was not much arm twisting involved, just him saying I will pay you to go to school. Seriously, I want to thank him for giving me latitude in course selection and in research activities that I was involved in at the ERC. I have enjoyed listening to his different philosophies on just about everything that we discussed. I also wish to recognize Dr. W. Scott Wayne for his guidance and patience during the entire DECSE program. His attitude was always positive about anything that we were ever involved with together. For that, I am grateful. Dr. Greg Thompson needs acknowledged for teaching me that great things happen when people work together. So much more is accomplished if everyone is on the same page and involved in the activity. I want to thank both Scott and Greg for agreeing to be on my committee. My parents deserve more recognition than I could ever acknowledge. I thank them for their endless love and support. I also want to thank them for setting high goals for me to achieve and not excepting anything but my best effort. Thanks, Brian and Jason, for being brothers that would do anything and everything for me. Next, I need to thank all the staff a...

show abstract

Measuring Diesel Emissions with a Split Exhaust Configuration

Wayne¹,

Corrigan²,

Atkinson³

et al. 2001

SAE Technical Paper Series

View full text Add to dashboard Cite

An ISO 8178 Correlation Study Between Raw and Dilute Exhaust Emission Sampling Systems

Cited by 4 publications

References 1 publication

Small engine emissions testing laboratory development and emissions sampling system verification

Small engine emissions testing laboratory development and emissions sampling system verification

Evaluating heavy-duty diesel engine aftertreatment devices with a split exhaust configuration

Measuring Diesel Emissions with a Split Exhaust Configuration

Contact Info

Product

Resources

About