A numerical study on knock combustion suppression using targeted fuel injection in an SI engine

Shuo Meng; Zhiyu Han; Zhenkuo Wu

doi:10.1177/09544070221143862

journal article Dec 23, 2022

A numerical study on knock combustion suppression using targeted fuel injection in an SI engine

Shuo Meng

Zhiyu Han

Zhenkuo Wu

Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering Vol. 238 No. 5 pp. 1114-1128 · SAGE Publications

View at Publisher Save 10.1177/09544070221143862

Abstract

A novel concept to suppress knock combustion using the targeted fuel injection in a spark-ignition (SI) engine is proposed, which utilizes a customized injector to inject a small portion of the total fuel toward the end-gas region in the late compression stroke so that charge cooling effect by fuel vaporization is imposed on the local mixtures. CFD studies were carried out to evaluate the effects of various targeted fuel injection strategies on the processes of charge cooling, air-fuel mixing and combustion in a 1.2-L gasoline SI engine with a high compression ratio. A knock prediction model adopting a level set G-equation model coupled with a transported Livengood-Wu integral correlation was applied to predict the knock event by capturing the occurrence of end-gas auto-ignition. It was found that the local gas temperatures in the sprayed region decreased and knock combustion tendency was suppressed indeed, and the degree of the reduction in local gas temperature and knock tendency was affected by the selected targeted injection strategy. However, the results also indicated that excessive fuels injected could result in worsen air-fuel mixing that led to incomplete combustion. Hence, the injection strategy needs to be optimized by balancing the knock tendency and combustion efficiency. The study further shown that the spark timing could be advanced by 3.3° crank angle in a particular injection strategy case by comparing with the non-targeted-injection case, which demonstrated the effectiveness of the proposed concept.

Topics

No keywords indexed for this article. Browse by subject →

References

42

[1]

10.1177/1468087419877990

[2]

U.S. Energy Information Administration. U.S. energy consumption by source and sector, https://www.eia.gov/totalenergy/data/monthly/pdf/flow/total-energy-spaghettichart-2021.pdf (2021, accessed 24 May 2022).

[3]

U.S. Energy Information Administration. U.S. petroleum products consumption by source and sector, https://www.eia.gov/totalenergy/data/monthly/pdf/flow/petroleum-spaghettichart-2021.pdf (2021, accessed 24 May 2022).

[4]

Hakariya M SAE technical paper 2017-01-1021 (2017)

[5]

Hwang K SAE technical paper 2016-01-0667 (2016)

[6]

Wakamatsu T Honda R&D Tech Rev (2018)

[7]

Tang Y SAE technical paper 2018-01-1129 (2018)

[8]

Nakai E 28th Aachen colloquium automobile and engine technology (2019)

[9]

10.1016/j.pecs.2017.03.004

[10]

Heywood JB. (2018)

[11]

Takahashi D SAE technical paper 2015-01-1254 (2015)

[12]

Xu Z SAE technical paper 2020-01-0836 (2020)

[13]

Yamaji K SAE technical paper 2018-01-0370 (2018)

[14]

Matsuo S SAE technical paper 2016-01-0684 (2016)

[15]

10.1115/1.4005113

[16]

Costa M SAE technical paper 2015-24-2432 (2015)

[17]

Suzuki Y SAE technical paper 2006-01-0230 (2006)

[18]

Han Z SAE Trans (2004)

[19]

Yi J SAE Trans (2004)

[20]

10.4271/9781468604016

[21]

The engine knock analysis – An overview

Xudong Zhen, Yang Wang, Shuaiqing Xu et al.

Applied Energy 10.1016/j.apenergy.2011.11.079

[22]

Liang L SAE technical paper 2007-01-0165 (2007)

[23]

10.1177/1468087417736430

[24]

10.1115/1.4043393

[25]

10.1016/j.apenergy.2019.114221

[26]

10.1017/cbo9780511612701

[27]

10.1016/s0082-0784(55)80047-1

[28]

10.4271/2022-01-7054

[29]

10.1177/0954407021993620

[30]

Meng S SAE technical paper 2021-01-7001 (2021)

[31]

Han Z A targeted injection method for knock suppression and a spark-ignition internal combustion engine using such a method (2021)

[32]

Richards KJ (2018)

[33]

Ewald J (2005)

[34]

Tan Z SAE Trans (2003)

[35]

10.1115/1.4040063

[36]

10.1016/j.combustflame.2015.02.005

[37]

10.1615/atomizspr.v9.i6.40

[38]

10.1006/jcph.2000.6568

[39]

O’Rourke PJ SAE Trans (2000)

[40]

10.2172/6228444

[41]

10.1080/00102209508907782

[42]

10.1016/0017-9310(96)00117-2

Metrics

6

Citations

42

References

Details

Published: Dec 23, 2022
Vol/Issue: 238(5)
Pages: 1114-1128
License: View

Authors

S

Shuo Meng

School of Automotive Studies, Tongji University, Shanghai, China

Z

Zhiyu Han

School of Automotive Studies, Tongji University, Shanghai, China

Z

Zhenkuo Wu

School of Automotive Studies, Tongji University, Shanghai, China

Cite This Article

Shuo Meng, Zhiyu Han, Zhenkuo Wu (2022). A numerical study on knock combustion suppression using targeted fuel injection in an SI engine. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 238(5), 1114-1128. https://doi.org/10.1177/09544070221143862

A numerical study on knock combustion suppression using targeted fuel injection in an SI engine

You May Also Like