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首页> 外文会议>ASME Internal Combustion Engine Division fall technical conference 2012 >IMPROVEMENT IN LEAN HOMOGENOUS SPARK-IGNITION COMBUSTION WITH PULSED ENERGY SPARK PLUG
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IMPROVEMENT IN LEAN HOMOGENOUS SPARK-IGNITION COMBUSTION WITH PULSED ENERGY SPARK PLUG

机译：脉冲能量火花塞改善均质火花点火燃烧

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This article describes a study involving new spark plug technology, referred to as pulsed energy spark plug, for use in igniting fuel-air mixtures in a spark ignition internal combustion engine. The study involves precisely controlled constant volume combustion bomb tests. The major defining difference between the pulsed energy spark plug and a conventional spark plug is a peaking capacitor that improves the electrical-to-plasma energy transfer efficiency from a conventional plug's 1% to the pulsed energy plug's 50%. Such an increase in transfer efficiency is believed to improve spark energy and subsequently the ignition time and burn rate of a homogeneous, or potentially stratified, fuel-air mixture. The study observes the pulsed energy plug to shorten the ignition delay of both stoichiometric and lean mixtures (with equivalence ratio of 0.8), relative to a conventional spark plug, without increasing the burn rate. Additionally, the pulsed energy plug demonstrates a decreased lean flammability limit that is about 14% lower (0.76 for conventional plug and 0.65 for pulsed energy plug) than that of the conventional spark plug. These features - advanced ignition of stoichiometric and lean mixtures and decreased lean flammability limits - might qualify the pulsed energy plugs as an enabling technology to effect the mainstream deployment of advanced, ultra-clean and ultra-efficient, spark ignition internal combustion engines. For example, the pulsed energy plug may improve ignition of stratified-GDI engines. Further, the pulsed energy plug technology may improve the attainability of lean-burn homogeneous charge compression ignition combustion by improving the capabilities of spark-assist. Finally, the pulsed energy plug could improve natural gas spark ignition engine development by improving the ignition system. Future work could center efforts on evaluating this spark plug technology in the context of advanced internal combustion engines, to transition the state of the art to the next level.
机译：本文介绍了一项涉及新火花塞技术的研究，该技术被称为脉冲能量火花塞，用于点燃火花点火式内燃机中的燃料-空气混合物。该研究涉及精确控制的恒定体积燃烧弹试验。脉冲能量火花塞与常规火花塞之间的主要区别是调峰电容器，该电容器可将电到等离子体的能量传输效率从常规火花塞的1％提高到脉冲能量塞的50％。据信，这种传输效率的提高改善了火花能量，从而改善了均匀或潜在分层的燃料-空气混合物的点火时间和燃烧率。研究发现，与传统的火花塞相比，脉冲式能量塞可缩短化学计量和稀薄混合气（当量比为0.8）的点火延迟，而不会增加燃烧速率。另外，脉冲能量塞显示出比常规火花塞降低的稀燃极限降低，其稀燃极限降低了约14％（常规火花塞为0.76，脉冲能量塞为0.65）。这些功能-化学计量和稀薄混合气的先进点火以及稀薄可燃性极限的降低-可能使脉冲式能量塞成为使先进，超清洁和超高效火花点火内燃机主流部署的一项使能技术。例如，脉冲式能量塞可以改善分层GDI发动机的点火性能。此外，脉冲能量塞技术可以通过提高火花辅助能力来改善稀薄燃烧均质充量压缩点火燃烧的可及性。最后，脉冲式能量塞可以通过改进点火系统来改善天然气火花点火发动机的发展。未来的工作可能会集中精力在高级内燃机的背景下评估这种火花塞技术，以将最新技术水平提升到一个新水平。

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