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Numerical and Experimental Study on Knock Sources in Spark Ignition Engine with Electromagnetic Valve Train

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Abstract

As one of the most common engine types in nowadays, the thermal efficiency of spark-Ignition (SI) engine is limited due to the lower compression ratio. Various technical solutions have been proposed to suppress knock and improve compression ratio of SI engines. In this paper, an new technical solution based on electromagnetic valve train (EMVT) was proposed to suppress knock of spark ignition engines, so that high compression ratio (HCR) engine (13:5) was obtained. Moreover, experimental and numerical analyses were carried out to optimize the proposed EMVT strategy. The result showed that the proposed EMVT strategies could well suppress the engine knock by reducing end-gas temperature and pressure and improving the spark-flame rate, resulting in significantly enhanced power, economic, and emission characteristics of SI engines. This study provides theoretical basis and technical approach for the development of internal combustion engines with high efficiency and high compression ratio.

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Abbreviations

MVT:

electromagnetic Valve Train

HCR:

high Compression Ratio

SI:

spark-Ignition

ECR:

effective Compression Ratio

EGR:

exhaust Gas Recirculation

EIVC:

early Intake Valve Closure

LIVC:

late Intake Valve Closure

IVO:

intake Valve Opened

TKE:

turbulent Kinetic Knergy

CA:

crank Angle

ATDC:

after Top Dad Center

BSFC:

brake Specific Fuel Consumption g/(kWh)

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Acknowledgement

This work is finanically supported by National Natural Science Foundation of China (Grant No. 51775260, and No. 51505213), Six Talent Peaks Project in Jiangsu Province (Grant No. GDZB58) and Introduced Talents Science Start-up Foundation of Nanjing Institute of Technology (Grant No. YKJ201904) for there is no Grant number for Qing Lan Project of Jiangsu Province.

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Authors and Affiliations

  1. School of Mechanical Engineering, Nanjing Institute of Industry Technology, Nanjing, 211167, China

    Jiangtao Xu & Yong Feng

  2. School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing, 210094, China

    Siqin Chang & Tongjun Guo

Authors
  1. Jiangtao Xu
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  2. Yong Feng
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  3. Siqin Chang
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  4. Tongjun Guo
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Correspondence to Yong Feng.

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Xu, J., Feng, Y., Chang, S. et al. Numerical and Experimental Study on Knock Sources in Spark Ignition Engine with Electromagnetic Valve Train. Int.J Automot. Technol. 21, 1369–1378 (2020). https://doi.org/10.1007/s12239-020-0129-1

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  • DOI: https://doi.org/10.1007/s12239-020-0129-1

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