毕业设计（论文）-上海通用别克电子燃油喷射系统的故障诊断与分析.docVIP

上海通用别克电子燃油喷射系统的故障诊断与分析 摘要：由于美、日、欧等国家对汽车排放法规的日趋严格和电控喷射系统控制精度更高，能进一步提高汽油发动机的动力性、经济性、运转性能和排放性能。在汽车故障中，发动机故障所占的比例最高，而1990年后的汽车大都装有电子燃油喷射系统，其电子燃油喷射系统故障大概占汽车故障的三分之二，因此具备电子燃油喷射系统的故障诊断与分析相关知识是十分必要的。 本文首先介绍了的电子燃油喷射系统发展ault Diagnosis and Analysis of Electronic Fuel Injection System of Shanghai GM Buick Abstract: As the United States, Japan, Europe and other countries to increasingly stringent vehicle emissions regulations, and electronically controlled injection system control more precise, to further increase the gasoline engine power, economy, operating performance and emissions performance. Failures in the car, the highest proportion of engine failure, but after 1990 most cars equipped with electronic fuel injection systems, electronic fuel injection system failure would account for about two-thirds of car trouble, so have the electronic fuel injection system fault diagnosis and analysis of relevant knowledge is essential. This paper describes the development of electronic fuel injection system, the causes and development process, and then analyzes the Shanghai between 1980 to 2004 Buick electronic fuel injection system components and working principle of the main structure; Second, after 2004 Shanghai Buick electronic fuel injection system technology.Finally, the introduction of Shanghai Buick L46, 2.98L, V6 engine electronic fuel injection system fault diagnosis procedure, and discusses the types and causes of its failure and diagnostics and Shanghai Buick examples of electronic fuel injection system fault diagnosis and analysis of specific. Keywords: Buick; Electronic Fuel Injection; Fault; Diagnosis and Analysis 引 言 从1953年时起，汽车电子燃油喷射在汽车中扮演着至关重要的角色。电控喷射系统是汽车中核心部件之一，其主要作用是在较大范围内改变汽车行驶动力的大小和汽车扭矩的大小、实现汽车的各种工况的有效控制。目前汽车上主要使用的电子燃油喷射系统有三系：欧系、日系、美系。在保证汽车动力性的前提下，以有利于燃油经济性为目的，控制动力系统工作在最佳工作点。经济高速发展，科学技术和人们生活水平不断提高的推动下，人们对车辆的动力性要求也越来越高，而电子燃油喷射系统性能直接影响着车辆动力性、经济性。同样在汽车故障中，其电子燃油喷射系统故障大概占汽车故障的三分之二，因此具备电子燃油喷射系统的故障诊断与分析相关知识是十分必要的，因此电子燃油喷射系统的故障诊断具有非常重要的意义。本文通过对上海别克轿车所使用的电子燃油喷射系统故障研究，最