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摘要科学的进步，以及汽车电子信息技术的迅猛发展，汽车上装置的电子元件越来越多，如何准确高效地诊断出汽车发动机电子控制系统的故障，是当今汽车行业必须克服的一个难题。发动机作为汽车的动力源泉，车辆的心脏部分，会因为使用幅度过大、使用操作不良和使用时间过长而导致故障。发动机离不开点火系统，其机能深受它的工作状况的影响。同样也体现在动力性、环保等方面。所以，对点火系的数据采集和波形分析十分重要。汽车的发动机一旦发生故障，缺乏准确的检测方法，只会事倍功半。一旦拥有一套简单易操作的方法，能够帮助汽车行业快速维修。这篇课题是为了采用当前先进的计算机技术，编写一套直观的点火系波形故障分析方法。46179
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通过labview仿真测试软件模拟发动机运行状况，采集数据参数，形成波形直观图。目前，在点火系故障诊断技术中广泛采用点火波形的分析方法，通过虚拟技术，改变传统上发动机硬件检测，用计算机软件代替实物测量。还介绍了测试系统的总体设计方案，介绍了labview软件的界面设计，进行数据采集和波形分析。介绍点火系的结构、工作过程及控制原理。学习和研究点火系故障诊断中的数据流和波形分析的原理和方法，了解故障诊断的关键技术与规范。
毕业论文关健词:labview；点火波形；故障诊断；
Abstract
Scientific progress and rapid development of automobile electronic information technology, device on automobile electronic components is more and more, how to accurately efficiently diagnosed faults of automobile engine electronic control system, is today's auto industry must overcome a problem. Engine as the power source of vehicle, the heart part of the vehicle, because the use range is too big, use and operation and poor use of time is too long and cause failure. Engine is inseparable from the ignition system and its function by the influence of its working condition. Also reflected in power, environmental protection and other aspects. In the ignition system of data acquisition and waveform analysis is very important. The engine of the car a Once fault occurs, the lack of accurate detection method will only get twice the result with half the effort. Once you have a set of simple and easy operation method, can help the auto industry, the rapid repair. This topic is in order to use the advanced computer technology, to write a direct ignition system fault waveform analysis method.
Through the LabVIEW simulation software to simulation engine operating conditions, collecting data, form the visual map. At present, in the ignition system fault diagnosis technology is widely used in the ignition waveform analysis method, through the virtual technology, change traditional engine hardware detection, calculating machine software instead of physical measurement. Also introduces the overall design scheme of the test system, introduces the LabVIEW software interface design, data acquisition and waveform analysis. Describes the structure of the ignition system, working process and the principle of control system. The study and research of ignition system fault diagnosis in the number according to the principle and method of flow and waveform analysis, understanding of fault diagnosis Key technologies and specifications.
Keywords: LabVIEW; ignition waveform; fault diagnosis;
目 录
第一章 概述 1
1.1课题的背景与意义 1
1.2课题的国内外动态 2
1.3课题的难点与关键问题 3
第二章 点火系的组成与原理 4
2.1点火系的组成与结构分析 4
2.2点火系的工作过程分析 5
第三章 点火系的波形分析与故障诊断 8
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