The effects of secondary air injection on particulate matter emissions
Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2014.
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| Other Authors: | |
| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2014
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| Online Access: | http://hdl.handle.net/1721.1/87963 |
| _version_ | 1811075995000635392 |
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| author | Pritchard, Joseph James |
| author2 | Wai K. Cheng. |
| author_facet | Wai K. Cheng. Pritchard, Joseph James |
| author_sort | Pritchard, Joseph James |
| collection | MIT |
| description | Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2014. |
| first_indexed | 2024-09-23T10:14:30Z |
| format | Thesis |
| id | mit-1721.1/87963 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T10:14:30Z |
| publishDate | 2014 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/879632019-04-12T11:10:34Z The effects of secondary air injection on particulate matter emissions Pritchard, Joseph James Wai K. Cheng. Massachusetts Institute of Technology. Department of Mechanical Engineering. Massachusetts Institute of Technology. Department of Mechanical Engineering. Mechanical Engineering. Thesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2014. Cataloged from PDF version of thesis. Includes bibliographical references (pages 69-71). An experimental study was performed to investigate the effects of secondary air injection (SAI) on particulate matter (PM) emissions. SAI was developed to reduce hydrocarbon (HC) emissions and has been shown to be effective as a strategy to reduce HC emissions at cold-start. In general, cold-start emissions have become an increasingly important problem due to new, more stringent vehicle emissions regulations. Direct-injection, spark-ignition (DISI) engines, which emit high levels of PM, are growing in popularity because of their fuel efficiency improvements. Meeting PM emissions becomes a more difficult task due to more stringent standards and the greater adoption of DISI engines. This study seeks to investigate the potential use of SAI to reduce PM emissions in the exhaust system. Engine based experiments were conducted using a 2.0 L, turbocharged, DISI General Motors LNF engine. The engine was outfitted with a secondary air injection system and several thermocouples to measure exhaust stream temperature. A TSI Model 3934 Scanning Mobility Particle Sizer (SMPS) was used to measure particle emissions at various engine operating conditions and secondary air rates. PM reductions were observed for the engine conditions and SAI flow rates that were tested. The maximum particle number reduction achieved was 80%. Particle number and particle volume reduction were observed to correlate well with exhaust enthalpy release. by Joseph James Pritchard. S.M. 2014-06-13T22:37:11Z 2014-06-13T22:37:11Z 2014 2014 Thesis http://hdl.handle.net/1721.1/87963 880688538 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 71 pages application/pdf Massachusetts Institute of Technology |
| spellingShingle | Mechanical Engineering. Pritchard, Joseph James The effects of secondary air injection on particulate matter emissions |
| title | The effects of secondary air injection on particulate matter emissions |
| title_full | The effects of secondary air injection on particulate matter emissions |
| title_fullStr | The effects of secondary air injection on particulate matter emissions |
| title_full_unstemmed | The effects of secondary air injection on particulate matter emissions |
| title_short | The effects of secondary air injection on particulate matter emissions |
| title_sort | effects of secondary air injection on particulate matter emissions |
| topic | Mechanical Engineering. |
| url | http://hdl.handle.net/1721.1/87963 |
| work_keys_str_mv | AT pritchardjosephjames theeffectsofsecondaryairinjectiononparticulatematteremissions AT pritchardjosephjames effectsofsecondaryairinjectiononparticulatematteremissions |