蓝擎发动机电气连贯性检测系统研究

发布时间：2018-05-18 14:03

本文选题：节能减排 + 电控　；参考：《吉林大学》2016年硕士论文

【摘要】：随着国家对排放要求的日益严格,电控柴油发动机成为中国柴油机产业未来20年内的发展主流,潍柴蓝擎系列产品正是在这种大时代背景下应运而生的,蓝擎系列必将成为未来潍柴发动机板块的重要战略支撑点。发动机电控系统中的传感器和线束是电控柴油机不可缺少的组成部分,负责采集、传递发动机工况及外部环境信息,传感器和线束的联通性直接影响发动机的性能。在潍柴,电控系统故障只能通过整机性能测试,即试车车间热试——将发动机发动,在座台上检验发动机运行状况及指标有无异常体现出来。热试有三大缺点,一是费用高,二是时间长,三是存在污染。根据潍柴降本增效的战略目标,潍柴蓝擎系列发动机引进最前沿的冷试技术之一——电气连贯性检测技术,整机电气连贯性检测是在发动机试车前通过静态测试(即冷测试)的方式,检测电控系统各传感器和线束的连接情况,是对柴油机电控系统线束、传感器的连续性进行测试。在试车车间的热试之前进行对传感器和线束联通性检测,减少热试时对电控系统故障排查的人力物力浪费。首先,本文介绍和分析了当下潍柴蓝擎系列电控系统柴油机的传感器种类,线束引脚的定义,介绍各类传感器的含义及ECU与曲轴位置传感器采集数据之间的计算方法,并简单介绍了凸轮轴位置传感器采集数据之间的计算方法。其次,主要介绍了整机电气连贯性检测设备的原理及测量方法,分别简述了各个传感器及线束的测试原理,并且该系统可获知发动机序列号,将测试结果写入发动机信息中,对测试结果不合格的发动机,进行报警,实现对传感器和线束联通性的检测。最后,根据整机电气连贯性检测设备理论研究,对40台发动机进行试验验证,本文详细介绍了测试步骤及实际操作,并对验证进行结果分析,试验结果表明整机电气连贯性检测结果可信度非常高。通过本文的研究也说明整机电气连贯性测试在发动机装配过程中的研究与应用对电控柴油机未来的发展具有极高的推广价值。
[Abstract]:With the increasingly stringent emission requirements of the country, the electronically controlled diesel engine has become the mainstream of the development of China's diesel engine industry in the next 20 years. Blue series will become the future Weichai engine plate important strategic support point. Sensor and wire harness are indispensable components of electronic control diesel engine. They are responsible for collecting and transmitting engine working conditions and external environment information. The connectivity of sensor and wire harness directly affects the performance of engine. In Weichai, the failure of the electronic control system can only be tested by the whole machine performance test, that is, the engine will be started by the hot test in the test shop, and the engine running condition and indexes will be checked on the bench to see if there are any anomalies in the performance of the engine. Hot test has three major disadvantages, one is high cost, the other is long time, and the third is pollution. According to the strategic goal of reducing cost and increasing efficiency by Weichai, Weichai Lanqing series engines have introduced one of the most advanced cold test technologies-electrical continuity testing technology. The electrical continuity test of the whole machine is a way of passing static test (i.e. cold test) before the engine test to detect the connection between the sensors and the wire harness in the electronic control system. It is also to test the continuity of the wire harness and the sensor of the electric control system of the diesel engine. In order to reduce the waste of manpower and material resources in the thermal test of the electronic control system, the connectivity of the sensor and the wire harness is detected before the thermal test. First of all, this paper introduces and analyzes the types of sensors, the definition of wire harness pins, the meaning of various sensors and the calculation method between ECU and crankshaft position sensors in the diesel engine of Weichai Lanqing series electric control system. The calculation method between the data collected by camshaft position sensor is introduced briefly. Secondly, it mainly introduces the principle and measurement method of the whole machine electrical coherence testing equipment, and describes the testing principle of each sensor and wire harness, and the system can obtain the engine serial number and write the test results into the engine information. The engine with unqualified test results is alerted to detect the connectivity of sensor and wire harness. Finally, 40 engines are tested and verified according to the theoretical research of the whole machine electrical continuity testing equipment. The test steps and practical operation are introduced in detail in this paper, and the results of the verification are analyzed. The test results show that the reliability of the test results is very high. It is also shown that the research and application of the electrical continuity test in the engine assembly process is of great value to the future development of electrically controlled diesel engine.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TK427

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