毕业论文--发动机电控燃油喷射系统故障诊断与检修

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1、中文摘要中文摘要 毕业论文（设计）毕业论文（设计） 中文题目：中文题目： 发动机电控燃油喷射系统故障诊断与检修发动机电控燃油喷射系统故障诊断与检修 英文题目：英文题目：F Fault detection and maintenance ault detection and maintenance of eof engine ngine electronic control fuel injection system electronic control fuel injection system 毕业专业：毕业专业： 汽车制造与装调技术汽车制造与装调技术 学生姓名：学生姓名： 准考证号：准考证

2、号： 指导教师：指导教师： 二零一二零一 三三 年年 十二十二月月 中文摘要中文摘要 中中 文文 摘摘 要要 随着国四排放标准的实施，全国各大汽车生产商在柴油车上都采用现在最普遍的办法 增加 SCR 尾气处理系统。通常叫做尿素系统。但由于车用尿素液的冰点很小，在中国 北方冬季的时候，车用尿素液会结成冰状固态，无法在系统管路中流通。所以需要为其配 备加热系统，方便在冬季时系统加热解冻。尿素系统管路从最原始的利用发动机冷却循环 水加热解冻，到现在成熟的利用电阻丝通电加热使尿素管路中尿素液解冻，技术发展的十 分迅猛。这导致了在国内能够具备批量生产合格电加热尿素管路能力的厂家凤毛麟角。这 使得在批量采

3、购电加热尿素管路时，能够有效的验证管路是否合格变得十分重要。本文重 点介绍电加热尿素管的技术要求，检验方法和过程。保证每辆汽车上的电加热尿素管都是 合格产品。 关键词：关键词：SCR 共轨喷射系统，电加热尿素管，性能检验 英文摘要英文摘要 A b s t r a c t With the rapid development of the national economy, vehicle production increased year by year. Car ownership in China is more and more, more and more complex models

4、. Especially the rapid development of high-tech, some of the new technologies, new materials, widely used on the car, to the automobile fault diagnosis and exclude some difficulty. In car use, electronically controlled fuel injection system is inevitable that this, as failure directly affect the nor

5、mal operation of the car. The car rapidly into the family car privatization improved, so the the car failure will affect each and every one of us. Analysis of the research electronically controlled fuel injection system failure phenomenon because, explore electronically controlled fuel injection sys

6、tem fault exclusion method and electronically controlled fuel injection system maintenance process, has great realistic significance. This thesis focuses on the automotive electronic control fuel injection system diagnosis and repair methods. And common automotive electronic control of fuel injection system failure, a correct understanding of the electronically controlled fuel injection system failure, better use and m