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首页> 外文会议>International Conference on Control, Computing, Communication and Materials >Thermodynamic study of the effects of delayed inlet valve closing on the performance of hythane (HCNG) fuelled S.I. engine
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Thermodynamic study of the effects of delayed inlet valve closing on the performance of hythane (HCNG) fuelled S.I. engine

机译：热力研究进气门延迟关闭对以汽油（HNG）为燃料的S.I.发动机性能的影响

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The dependence of road transportation on fossil fuels and the related economic and environmental consequences imposes the diversification of energy resources. In order to boost the development of hydrogen technology and reduce the dependence from conventional fossil fuels, hydrogen can be used in internal combustion engines with natural gas (NG). Hydrogen-Natural gas (HCNG) blends, commonly known as Hythane. Spark ignition engine fueled by hythane have many advantages compared to gasoline, diesel & natural gas engines especially in emission control and combustion rate. Hydrogen blending with CNG is looked upon as a good alternative fuel because it improves the low burning velocity and poor combustion stability of Natural gas fueled engine. In this paper a predictive combustion model has been used to simulate the working cycle of HCNG engine which is applicable for different blending ratio. The fundamentals and the governing equations of the thermodynamic model are introduced and solved with the help of Runge-Kutta & Newton Raphson technique in the simulated model. The laminar flame speed which is considered to be the most influencing parameter is predicted. It was attempted to correlate the calculated laminar flame speed by means of Le Chatelier's Rule like formula. The simulated results are compared with the experimental results of flame speed, pressure cylinder data, and performance characteristics of the SI engine obtained by researchers. Based on these results the effect of late inlet valve closing is monitored and it was found that late closing of the inlet valve tends to enhance significantly in engine performance and reduction in emissions.
机译：公路运输对化石燃料的依赖性以及相关的经济和环境后果使能源资源更加多样化。为了促进氢技术的发展并减少对常规化石燃料的依赖性，可以将氢用于天然气（NG）的内燃机中。氢天然气（HCNG）混合物，俗称“海烷”。与汽油，柴油和天然气发动机相比，以汽油为燃料的火花点火式发动机具有许多优势，尤其是在排放控制和燃烧率方面。氢气与CNG的混合被认为是一种很好的替代燃料，因为它改善了天然气燃料发动机的低燃烧速度和较差的燃烧稳定性。本文采用了预测性燃烧模型来模拟HCNG发动机的工作循环，适用于不同的混合比。介绍了热力学模型的基本原理和控制方程，并借助Runge-Kutta和Newton Raphson技术在模拟模型中对其进行了求解。预测被认为是影响最大的参数的层流火焰速度。试图通过勒沙特利尔法则（Le Chatelier's Rule）等公式来关联计算的层流火焰速度。研究人员将模拟结果与火焰速度，压力缸数据和SI发动机性能特征的实验结果进行了比较。基于这些结果，对进气门的延迟关闭的效果进行了监视，发现进气门的延迟关闭趋向于显着提高发动机性能并减少排放。

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