（毕业设计论文）《汽油发动机尾气排放的影响因素及控制》.doc

精品 精品 汽油发动机尾气排放的影响因素及控制 摘 要 随着我国国民经济的持续稳定发展,汽车工业得到很快的发展。汽车制造业、汽车运输业和服务业在国民经济建设中发挥着重要作用，汽车保有量的增长直接导致了石油燃料的大量消耗.并由此产生了大量的有害排放物。尤其在一些大中城市.汽车排气造成的环境污染问题日趋严重。 目前，大气污染已逐渐成为世界性的问题,所以对汽车排气污染物的监控与防治处于刻不容缓的地步。本问将通过汽油发动机排放的污染物，尾气中主要污染物形成的机理，汽油发动机尾气排放的影响因素，排放尾气中主要污染物的危害，尾气排放的控制，传感器与闭环控制，废气再循环控制，二次空气吸入和二次空气喷射，活性碳罐蒸发污染控制，尾气治理等方面来来介绍及控制汽油发动机尾气排放的影响因素及控制方法。 关键词：汽油发动机尾气，尾气的危害，控制技术 ABSTRACT With the sustained and stable development of China's national economy, the automotive industry have developed rapidly. Automobile manufacturing, motor transportation and service industries in the national economy plays an important role in the growth of car ownership in the amount of fuel directly led to consumption of large quantities of oil. And thus generated a lot of harmful emissions. Especially in some cities. Vehicle exhaust caused by the increasing problem of environmental pollution. Currently, air pollution has become a worldwide problem, so the monitoring of vehicle exhaust emissions and control in a critical state. This q will through the gasoline engine, exhaust emissions of pollutants, the formation mechanism of the main pollutants in gasoline engine exhaust emission, influence factors, the main pollutant discharge in vehicle exhaust emissions from harm, the control, the sensor and closed-loop control, waste gas recirculation control, secondary air inhaled and secondary air sparging, active carbon cans of evaporation pollution control of tail gas treatment etc, to introduce and control gasoline engine emissions affecting factors and control method. KEY WORDS: gasoline engine exhaust, exhaust hazards, control 精品 目 录 前 言 HYPERLINK \l "_Toc289517684" PAGEREF _Toc289517684 \h 1 TOC \o "1-3" \h \z \u HYPERLINK \l "_Toc289517684" 第一章、汽油发动机尾气排放的污染物 PAGEREF _Toc289517684 \h 2 § HYPERLINK \l "_Toc289517685" 1.1、尾气中主要污染物形成的机理 PAGEREF _Toc289517685 \h 2 § HYPERLINK \l "_Toc289517686" 1.1.1、一氧化碳(CO)的形成 PAGEREF _Toc289517686 \h 2 § HYPERLINK \l "_Toc289517687" 1.1.2、氢化合物(HC)的形成 PA