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<p>In the next few years, although the share of sales of electrically powered vehicles will be higher, gasoline-powered vehicles will still be in the majority. The development of these future spark-ignition engines will focus on drastically reducing CO<sub>2</sub> emissions and they will be as always subjected to ignition defects such as misfire which remain a significant source of vibrational excitation in mechanical drivetrains. While the effects of misfire on ICE dynamics have been extensively studied, their influence on the coupled ICE–gearbox system, particularly in gasoline engines, has received limited attention. Existing studies primarily focus on diesel engines and rely on simplified models that do not capture medium- and high-frequency gearbox dynamics such as gear meshing effects. This work presents a detailed analysis and quantification of the misfire and its impact on the dynamic response of the car gearbox, providing novel insights into the vibratory consequences of ignition faults in gasoline-powered transmissions. For this, a dynamic model of car gearbox powered by ICE is proposed. Equation of motion is established and solved by using, respectively, Lagrange formulism and Newmark algorithm.</p>

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Vibration-based study of gearbox dynamic response to engine misfire in gasoline vehicles

  • 期刊论文

  • 发表日期：

    2025年9月2日

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  • Amira Hattay,
  • Atef Hmida,
  • Ahmed Hammami,
  • Ahmed Mohamed Yahya,
  • Abdel Kader Mahmoud,
  • Mohamed Haddar

摘要

In the next few years, although the share of sales of electrically powered vehicles will be higher, gasoline-powered vehicles will still be in the majority. The development of these future spark-ignition engines will focus on drastically reducing CO2 emissions and they will be as always subjected to ignition defects such as misfire which remain a significant source of vibrational excitation in mechanical drivetrains. While the effects of misfire on ICE dynamics have been extensively studied, their influence on the coupled ICE–gearbox system, particularly in gasoline engines, has received limited attention. Existing studies primarily focus on diesel engines and rely on simplified models that do not capture medium- and high-frequency gearbox dynamics such as gear meshing effects. This work presents a detailed analysis and quantification of the misfire and its impact on the dynamic response of the car gearbox, providing novel insights into the vibratory consequences of ignition faults in gasoline-powered transmissions. For this, a dynamic model of car gearbox powered by ICE is proposed. Equation of motion is established and solved by using, respectively, Lagrange formulism and Newmark algorithm.