Influence of fuel properties on knock under lean combustion conditions
Internal combustion engines today are required to provide even higher levels of thermal efficiency. Raising the compression ratio and applying lean combustion are effective measures for increasing the thermal efficiency of internal combustion engines. However, raising the compression ratio gives ris...
| Main Authors: | , , |
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| Format: | Article |
| Language: | Japanese |
| Published: |
The Japan Society of Mechanical Engineers
2021-04-01
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| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/87/896/87_20-00359/_pdf/-char/en |
| _version_ | 1798014992562257920 |
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| author | Teruhiko OTOKOZAWA Takeshi NISHIYAMA Akira IIJIMA |
| author_facet | Teruhiko OTOKOZAWA Takeshi NISHIYAMA Akira IIJIMA |
| author_sort | Teruhiko OTOKOZAWA |
| collection | DOAJ |
| description | Internal combustion engines today are required to provide even higher levels of thermal efficiency. Raising the compression ratio and applying lean combustion are effective measures for increasing the thermal efficiency of internal combustion engines. However, raising the compression ratio gives rise to knock accompanied by pressure oscillations in the combustion chamber, thereby hindering the attainment of higher thermal efficiency. In short, it is necessary to have a technique for suppressing knock under engine operating conditions of a high compression ratio and lean combustion. The reaction characteristics of the fuel have a large effect on the occurrence of knock. Yet, the relationship between fuel properties and knock has still not been made entirely clear under conditions of a high compression ratio and lean combustion. Therefore, in this study a test engine was used to examine autoignition characteristics, pressure waveforms and other combustion characteristics under a condition of a high compression ratio, focusing in particular on fuel properties. As a result, it was found that, in addition to the fuel octane number, a fuel with a long ignition delay time in the high-temperature region is effective in suppressing knock accompanied by pressure oscillations. |
| first_indexed | 2024-04-11T15:27:14Z |
| format | Article |
| id | doaj.art-c09112e78b2548e388b9314935d4b04b |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-11T15:27:14Z |
| publishDate | 2021-04-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-c09112e78b2548e388b9314935d4b04b2022-12-22T04:16:14ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612021-04-018789620-0035920-0035910.1299/transjsme.20-00359transjsmeInfluence of fuel properties on knock under lean combustion conditionsTeruhiko OTOKOZAWA0Takeshi NISHIYAMA1Akira IIJIMA2Nihon Univ. Graduate School of Science and Technology, Dept. of Mechanical EngineeringNihon Univ. Graduate School of Science and Technology, Dept. of Mechanical EngineeringNihon Univ. College of Science and Technology, Dept. of Mechanical EngineeringInternal combustion engines today are required to provide even higher levels of thermal efficiency. Raising the compression ratio and applying lean combustion are effective measures for increasing the thermal efficiency of internal combustion engines. However, raising the compression ratio gives rise to knock accompanied by pressure oscillations in the combustion chamber, thereby hindering the attainment of higher thermal efficiency. In short, it is necessary to have a technique for suppressing knock under engine operating conditions of a high compression ratio and lean combustion. The reaction characteristics of the fuel have a large effect on the occurrence of knock. Yet, the relationship between fuel properties and knock has still not been made entirely clear under conditions of a high compression ratio and lean combustion. Therefore, in this study a test engine was used to examine autoignition characteristics, pressure waveforms and other combustion characteristics under a condition of a high compression ratio, focusing in particular on fuel properties. As a result, it was found that, in addition to the fuel octane number, a fuel with a long ignition delay time in the high-temperature region is effective in suppressing knock accompanied by pressure oscillations.https://www.jstage.jst.go.jp/article/transjsme/87/896/87_20-00359/_pdf/-char/enlean combustionknockingautoignitionhigh compression ratio |
| spellingShingle | Teruhiko OTOKOZAWA Takeshi NISHIYAMA Akira IIJIMA Influence of fuel properties on knock under lean combustion conditions Nihon Kikai Gakkai ronbunshu lean combustion knocking autoignition high compression ratio |
| title | Influence of fuel properties on knock under lean combustion conditions |
| title_full | Influence of fuel properties on knock under lean combustion conditions |
| title_fullStr | Influence of fuel properties on knock under lean combustion conditions |
| title_full_unstemmed | Influence of fuel properties on knock under lean combustion conditions |
| title_short | Influence of fuel properties on knock under lean combustion conditions |
| title_sort | influence of fuel properties on knock under lean combustion conditions |
| topic | lean combustion knocking autoignition high compression ratio |
| url | https://www.jstage.jst.go.jp/article/transjsme/87/896/87_20-00359/_pdf/-char/en |
| work_keys_str_mv | AT teruhikootokozawa influenceoffuelpropertiesonknockunderleancombustionconditions AT takeshinishiyama influenceoffuelpropertiesonknockunderleancombustionconditions AT akiraiijima influenceoffuelpropertiesonknockunderleancombustionconditions |