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Study on the Effects of EGR and Spark Timing on the Combustion, Performance, and Emissions of a Stoichiometric Natural Gas Engine
[Image: see text] This paper involved conducting an experimental investigation on the effects of exhaust gas recirculation (EGR) and spark timing on the combustion, performance, and emission characteristics of a China-VI heavy-duty, natural gas engine fueled with high-methane content. The results sh...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2020
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7581277/ https://www.ncbi.nlm.nih.gov/pubmed/33111003 http://dx.doi.org/10.1021/acsomega.0c03859 |
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author | Lou, Diming Ren, Yedi Zhang, Yunhua Sun, Xia |
author_facet | Lou, Diming Ren, Yedi Zhang, Yunhua Sun, Xia |
author_sort | Lou, Diming |
collection | PubMed |
description | [Image: see text] This paper involved conducting an experimental investigation on the effects of exhaust gas recirculation (EGR) and spark timing on the combustion, performance, and emission characteristics of a China-VI heavy-duty, natural gas engine fueled with high-methane content. The results showed that increasing the EGR rate extends the spark timing range and slows the combustion. This then increases ignition delay, prolongs combustion duration, and decreases heat release rate. Peak in-cylinder pressure (PCP) and indicated thermal efficiency (ITE) initially increase because of higher boost pressure with increasing EGR rate. However, as EGR rate increases further, PCP and ITE begin to decrease because of the deviation of combustion phasing. Lower in-cylinder temperature caused by higher EGR rate may cause nitrogen oxide (NOx) emissions to reduce significantly, while total hydrocarbon (THC) and carbon monoxide (CO) emissions increase, and THC emissions could increase exponentially at high EGR rates. In-cylinder pressure, temperature, and heat release rate increase with early spark timing, but the rate of increase is reduced at higher engine speeds. Early spark timing causes THC and CO emissions to increase at part-load conditions, whereas there is little change at full-load conditions. NOx emissions also increase with early spark timing because of the higher in-cylinder temperature. |
format | Online Article Text |
id | pubmed-7581277 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-75812772020-10-26 Study on the Effects of EGR and Spark Timing on the Combustion, Performance, and Emissions of a Stoichiometric Natural Gas Engine Lou, Diming Ren, Yedi Zhang, Yunhua Sun, Xia ACS Omega [Image: see text] This paper involved conducting an experimental investigation on the effects of exhaust gas recirculation (EGR) and spark timing on the combustion, performance, and emission characteristics of a China-VI heavy-duty, natural gas engine fueled with high-methane content. The results showed that increasing the EGR rate extends the spark timing range and slows the combustion. This then increases ignition delay, prolongs combustion duration, and decreases heat release rate. Peak in-cylinder pressure (PCP) and indicated thermal efficiency (ITE) initially increase because of higher boost pressure with increasing EGR rate. However, as EGR rate increases further, PCP and ITE begin to decrease because of the deviation of combustion phasing. Lower in-cylinder temperature caused by higher EGR rate may cause nitrogen oxide (NOx) emissions to reduce significantly, while total hydrocarbon (THC) and carbon monoxide (CO) emissions increase, and THC emissions could increase exponentially at high EGR rates. In-cylinder pressure, temperature, and heat release rate increase with early spark timing, but the rate of increase is reduced at higher engine speeds. Early spark timing causes THC and CO emissions to increase at part-load conditions, whereas there is little change at full-load conditions. NOx emissions also increase with early spark timing because of the higher in-cylinder temperature. American Chemical Society 2020-10-08 /pmc/articles/PMC7581277/ /pubmed/33111003 http://dx.doi.org/10.1021/acsomega.0c03859 Text en © 2020 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes. |
spellingShingle | Lou, Diming Ren, Yedi Zhang, Yunhua Sun, Xia Study on the Effects of EGR and Spark Timing on the Combustion, Performance, and Emissions of a Stoichiometric Natural Gas Engine |
title | Study on the Effects of EGR and Spark Timing on the
Combustion, Performance, and Emissions of a Stoichiometric Natural
Gas Engine |
title_full | Study on the Effects of EGR and Spark Timing on the
Combustion, Performance, and Emissions of a Stoichiometric Natural
Gas Engine |
title_fullStr | Study on the Effects of EGR and Spark Timing on the
Combustion, Performance, and Emissions of a Stoichiometric Natural
Gas Engine |
title_full_unstemmed | Study on the Effects of EGR and Spark Timing on the
Combustion, Performance, and Emissions of a Stoichiometric Natural
Gas Engine |
title_short | Study on the Effects of EGR and Spark Timing on the
Combustion, Performance, and Emissions of a Stoichiometric Natural
Gas Engine |
title_sort | study on the effects of egr and spark timing on the
combustion, performance, and emissions of a stoichiometric natural
gas engine |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7581277/ https://www.ncbi.nlm.nih.gov/pubmed/33111003 http://dx.doi.org/10.1021/acsomega.0c03859 |
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