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Effects of Water Injection on Combustion Emission and Knock Characteristics of Turbocharged Direct Injection Gasoline Engine.

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Title: Effects of Water Injection on Combustion Emission and Knock Characteristics of Turbocharged Direct Injection Gasoline Engine.
Authors: Wang, Junjun1,2 (AUTHOR), Yan, Fuwu1 (AUTHOR) yanfw@whut.edu.cn, Yan, Dong2 (AUTHOR), Zhang, Wenlong2 (AUTHOR), Zhang, Guoqing1,2 (AUTHOR), Zhang, Jizhou1 (AUTHOR), Chen, Ziyi1 (AUTHOR), Wang, Yu1 (AUTHOR)
Source: International Journal of Automotive Technology. Aug2022, Vol. 23 Issue 4, p899-912. 14p.
Subjects: Spark ignition engines, Knock in automobile engines, Combustion, Soot, Kinetic energy, Water temperature
Abstract: This paper studied the effects of water injection on combustion, emissions and knock. The results showed that direct water injection (DWI) absorbed more heat than inlet port water injection (PWI), resulting in lower cylinder pressure, higher oxygen content and longer combustion duration. And the turbulence kinetic energy of DWI model was greater, resulting in lower soot and CO emissions of DWI. Furthermore, the cooling effect of exhaust port side WI was better than intake port side, which reduced NOx emission. Besides, the injection pressure of single injector WI was higher than double injector, which increased the combustion duration and reduced the cylinder pressure. The decrease of temperature under water dilution was the main reason for the reduction of NOx, while the increase of incomplete combustion increased the soot and CO emission. Finally, with the same amount of WI, the knock suppression effect of DWI models was better than PWI models. The knock intensity (KI) of all models decreased gradually with the increase of water, and DWI models decreased more rapidly. For PWI models, when the amount of water became smaller, the engine pressure fluctuation of certain areas in the cylinder increased slightly, weakening the influence of WI on engine knock. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Automotive Technology is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 158446158
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  Label: Title
  Group: Ti
  Data: Effects of Water Injection on Combustion Emission and Knock Characteristics of Turbocharged Direct Injection Gasoline Engine.
– Name: Author
  Label: Authors
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  Data: <searchLink fieldCode="AR" term="%22Wang%2C+Junjun%22">Wang, Junjun</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yan%2C+Fuwu%22">Yan, Fuwu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> yanfw@whut.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Yan%2C+Dong%22">Yan, Dong</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Wenlong%22">Zhang, Wenlong</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Guoqing%22">Zhang, Guoqing</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Jizhou%22">Zhang, Jizhou</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Ziyi%22">Chen, Ziyi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Yu%22">Wang, Yu</searchLink><relatesTo>1</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Automotive+Technology%22">International Journal of Automotive Technology</searchLink>. Aug2022, Vol. 23 Issue 4, p899-912. 14p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Spark+ignition+engines%22">Spark ignition engines</searchLink><br /><searchLink fieldCode="DE" term="%22Knock+in+automobile+engines%22">Knock in automobile engines</searchLink><br /><searchLink fieldCode="DE" term="%22Combustion%22">Combustion</searchLink><br /><searchLink fieldCode="DE" term="%22Soot%22">Soot</searchLink><br /><searchLink fieldCode="DE" term="%22Kinetic+energy%22">Kinetic energy</searchLink><br /><searchLink fieldCode="DE" term="%22Water+temperature%22">Water temperature</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This paper studied the effects of water injection on combustion, emissions and knock. The results showed that direct water injection (DWI) absorbed more heat than inlet port water injection (PWI), resulting in lower cylinder pressure, higher oxygen content and longer combustion duration. And the turbulence kinetic energy of DWI model was greater, resulting in lower soot and CO emissions of DWI. Furthermore, the cooling effect of exhaust port side WI was better than intake port side, which reduced NOx emission. Besides, the injection pressure of single injector WI was higher than double injector, which increased the combustion duration and reduced the cylinder pressure. The decrease of temperature under water dilution was the main reason for the reduction of NOx, while the increase of incomplete combustion increased the soot and CO emission. Finally, with the same amount of WI, the knock suppression effect of DWI models was better than PWI models. The knock intensity (KI) of all models decreased gradually with the increase of water, and DWI models decreased more rapidly. For PWI models, when the amount of water became smaller, the engine pressure fluctuation of certain areas in the cylinder increased slightly, weakening the influence of WI on engine knock. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Automotive Technology is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s12239-022-0079-x
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 14
        StartPage: 899
    Subjects:
      – SubjectFull: Spark ignition engines
        Type: general
      – SubjectFull: Knock in automobile engines
        Type: general
      – SubjectFull: Combustion
        Type: general
      – SubjectFull: Soot
        Type: general
      – SubjectFull: Kinetic energy
        Type: general
      – SubjectFull: Water temperature
        Type: general
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      – TitleFull: Effects of Water Injection on Combustion Emission and Knock Characteristics of Turbocharged Direct Injection Gasoline Engine.
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            NameFull: Wang, Junjun
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            – D: 01
              M: 08
              Text: Aug2022
              Type: published
              Y: 2022
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