Analysis of various fuels in DISI and PFI engines : separating mixing effects from crevice and quench layer effects
Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, June 2013.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2014
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| Online Access: | http://hdl.handle.net/1721.1/86269 |
| _version_ | 1826216909315506176 |
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| author | Avadhany, Sareena |
| author2 | Sanjay Sarma. |
| author_facet | Sanjay Sarma. Avadhany, Sareena |
| author_sort | Avadhany, Sareena |
| collection | MIT |
| description | Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, June 2013. |
| first_indexed | 2024-09-23T16:55:03Z |
| format | Thesis |
| id | mit-1721.1/86269 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T16:55:03Z |
| publishDate | 2014 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/862692019-04-12T15:25:32Z Analysis of various fuels in DISI and PFI engines : separating mixing effects from crevice and quench layer effects Analysis of various fuels in direct injection, spark ignition and port fuel injection engines : separating mixing effects from crevice and quench layer effects Avadhany, Sareena Sanjay Sarma. Massachusetts Institute of Technology. Department of Mechanical Engineering. Massachusetts Institute of Technology. Department of Mechanical Engineering. Mechanical Engineering. Thesis: S.B., Massachusetts Institute of Technology, Department of Mechanical Engineering, June 2013. Cataloged from PDF version of thesis. Includes bibliographical references (pages 43-44). The United States consumes billions of gallons of gasoline per year, threatening national security and causing environmental problems. Research in automotive research aims to resolve such problems. Solutions include turbocharged direct injection, spark ignition (DISI) engines for higher output and efficiency. But this comes at the cost of greater concentrations of unburned hydrocarbons (UBHC) in the exhaust during cold start, when the catalytic converter is further away from the engine. The time the catalytic converter takes to heat to an optimum efficiency is longer. UBHC can also accumulate in the cylinder chambers and can be caused by quenching effects or poor mixing. A system was set up to determine the significance of mixing in producing high concentrations of UBHC. A GM 2009 LNF Ecotec was modified to run PFI and DISI under operating conditions representative of cold start for isopentane, and gasoline with varying concentrations of ethanol. Results were inconclusive, indicating no relationship between neither the UBHC count in the exhaust of increasing ethanol concentration, nor differences between PFI and DISI. To make test results more reliable, more ethanol containing fuel types should be tested, and a sweep of spark times should be assessed. The set up does provide a good foundation for further studies in mixing research. by Sareena Avadhany. S.B. 2014-04-25T15:47:55Z 2014-04-25T15:47:55Z 2012 2013 Thesis http://hdl.handle.net/1721.1/86269 874156924 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 44 pages application/pdf Massachusetts Institute of Technology |
| spellingShingle | Mechanical Engineering. Avadhany, Sareena Analysis of various fuels in DISI and PFI engines : separating mixing effects from crevice and quench layer effects |
| title | Analysis of various fuels in DISI and PFI engines : separating mixing effects from crevice and quench layer effects |
| title_full | Analysis of various fuels in DISI and PFI engines : separating mixing effects from crevice and quench layer effects |
| title_fullStr | Analysis of various fuels in DISI and PFI engines : separating mixing effects from crevice and quench layer effects |
| title_full_unstemmed | Analysis of various fuels in DISI and PFI engines : separating mixing effects from crevice and quench layer effects |
| title_short | Analysis of various fuels in DISI and PFI engines : separating mixing effects from crevice and quench layer effects |
| title_sort | analysis of various fuels in disi and pfi engines separating mixing effects from crevice and quench layer effects |
| topic | Mechanical Engineering. |
| url | http://hdl.handle.net/1721.1/86269 |
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