《摩托车电控汽油机点火系统次级高压测量研究》-毕业论文.doc

PAGE w 摩托车电控汽油机点火系统次级高压测量研究 摘 要 随着摩托车排放法规越来越严格，研究发现采用稀燃技术下的电控点火可以很好的解决问题。点火系统对汽油机是十分重要的组成部分。而点火系统次级电压是汽油机点火线圈最关键的性能参数之一，它决定了点火系统的可靠性。次级高压的测量具有十分重要的意义。本文在深入分析国内外汽油机点火电压的测量方法和研究现状的基础上，对汽油机点火系统次级高压测量的理论和方法进行了深入的研究。 首先，介绍了摩托车汽油机解决排放问题采用新技术，特别是对稀燃技术重点介绍。详细研究了汽油机点火系统的要求、发展状况。 其次，认真分析汽油机电容放电点火系统的工作原理及其次级电压的特性。为了解决点火系统次级高压测量中存在高电压、频带宽、干扰的问题，采用了两级电阻分压器。分析了测量系统中的阻抗匹配问题及改善分压器性能的措施。介绍了收集式补偿电阻分压器的设计。 最后，充分考虑了电磁兼容性， 针对汽油机点火系统火花放电的强电磁干扰，从硬件设计和软件设计两个方面采取了有效的抗干扰措施，确保测量仪能够正常工作。 本文的测量方法不仅满足了工程应用的需要，而且具有成本低、体积小的优点，因而具有比较广阔的应用前景，会带来较好的经济效益和社会效益。 关键词：次级高压，测量，电阻分压器，抗干扰设计 Study on measurement of the high-voltage of secondary for motorcycle electronic-controlled gasoline engine With increasingly stringent emission regulations motorcycles, the study found that the use of lean burn technology of electronic control of ignition can be very good to solve the problem. Ignition system is a very important component of gasoline engine.The high-voltage of secondary coil ignition system is one of the most critical performance parameters of gasoline engine. It determines the reliability of the ignition system．The high-voltage of secondary coil is very important. Based on the of thorough investigation on the related literatures at home and abroad ,this thesis is aimed to in vestigate the theory and measurement methodology of ignition voltage in gasoline engine . Firstly introduced to solve a motorcycle gasoline engine emissions using new technologies, especially focusing on lean burn technology. A detailed study of gasoline engine ignition system requirements, development of the province. Secondly, a careful analysis of gas-discharge ignition system electrical and mechanical capacity of the working principle and its sub-voltage characteristics. To address the sub-high-voltage ignition system high voltage measurement, frequency bandwidth, interference problems, the use of a two-resistor voltage divider. Analysis of the measurement system and the impedance matching performance measures to improve