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首页> 外文学位 >Development of a predictive combustion model of a spark ignited engine with gasoline direct injection, variable valve timing, duration and lift technologies.
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Development of a predictive combustion model of a spark ignited engine with gasoline direct injection, variable valve timing, duration and lift technologies.

机译：利用汽油直接喷射，可变气门正时，持续时间和升程技术开发火花点火式发动机的预测燃烧模型。

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摘要

There is a need by engine manufactures for computationally efficient and accurate predictive combustion modeling tools for integration in engine simulation software for the assessment of combustion system hardware designs and early development of engine calibrations.;This thesis discusses the process for the development and validation of a combustion modeling tool for Gasoline Direct Injected Spark Ignited Engine with variable valve timing, lift and duration valvetrain hardware from experimental data. Data was correlated and regressed from accepted methods for calculating the turbulent flow and flame propagation characteristics for an internal combustion engine.;A non-linear regression modeling method was utilized to develop a combustion model to determine the fuel mass burn rate at multiple points during the combustion process. The computational fluid dynamic software Converge ©, was used to simulate and correlate the 3-D combustion system, port and piston geometry to the turbulent flow development within the cylinder to properly predict the experimental data turbulent flow parameters through the intake, compression and expansion processes. The engine simulation software GT-Power © is then used to determine the 1-D flow characteristics of the engine hardware being tested to correlate the regressed combustion modeling tool to experimental data to determine accuracy.;The results of the combustion modeling tool show accurate trends capturing the combustion sensitivities to turbulent flow, thermodynamic and internal residual effects with changes in intake and exhaust valve timing, lift and duration.
机译：发动机制造商需要一种计算效率高且准确的预测燃烧建模工具，以便将其集成到发动机仿真软件中，以评估燃烧系统的硬件设计和发动机标定的早期开发。用于汽油直喷式火花点火发动机的燃烧建模工具，具有可变气门正时，升程和持续时间气门机构硬件，来自实验数据。对数据进行关联并从公认的方法计算出内燃机的湍流和火焰传播特性。;非线性回归建模方法用于建立燃烧模型，以确定在燃烧过程中多个点的燃油质量燃烧率。燃烧过程。计算流体动力学软件 Converge ©用于模拟3-D燃烧系统，进气道和活塞的几何形状并将其与气缸内的湍流发展相关联，以正确预测通过进气，压缩和膨胀过程的实验数据湍流参数。然后，使用发动机仿真软件 GT-Power ©确定要测试的发动机硬件的一维流动特性，以将回归燃烧建模工具与实验数据关联起来，确定准确度。燃烧建模工具的结果显示出准确的趋势，记录了燃烧对湍流，热力学和内部残余效应的敏感性，以及进气门和排气门正时，升程和持续时间的变化。

著录项

  • 作者

    Loveland, Dustin P.;

  • 作者单位

    Michigan Technological University.;

  • 授予单位 Michigan Technological University.;
  • 学科 Engineering Automotive.;Engineering Mechanical.
  • 学位 M.S.
  • 年度 2012
  • 页码 96 p.
  • 总页数 96
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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