Thereby , it is no time to delay to inspect and prevent automobile emission pollutant , while , in order to do better the work , we must do better automobile emission inspection firstly 所以对汽车排气污染物的监控与防治已处于刻不容缓的地步，而要搞好汽车排气污染物的监控与防治，首先必需做好汽车尾气的检测工作。
Burning a coal - based synthetic fuel rather than gasoline to drive a set distance releases approximately double the carbon dioxide , when one takes into account both tailpipe and synfuels plant emissions 将汽车排气管与燃料合成厂的排放量合并计算，相同的行车距离，燃烧以煤为主体的合成燃料所排出的二氧化碳，是燃烧汽油的两倍左右。
The technology of controlling vehicle emission is researched . some deep studies , matching technology of engine for vehicle , emission performance of engine , working process of emission postprocessor , are investigated 本文研究汽车排放污染物的控制技术，在发动机与整车匹配技术、汽车发动机排气性质、汽车排气后处理装置工作过程等方面开展了深入的研究。
As the exhaust system is getting with hi - tech design , it also becomes more competitive to the worldwide market . all products now must be inspected strictly via horsepower testing , and only can be mass - produced after passing the harsh test 在世界的汽车排气系统日渐精良,届时也加入国际市场的战局；在开发过程并受严格考验,只要开发新产品必定接受马力测试机测试,测试无误后再至道路上实测后才做量产。
For the theoretical research of catalytic converter , this paper has discussed and analyzed the emission reduction principle , muffler noise suppression mechanism , substrate ' s physical & chemical performance and the durability , and concluded the theoretical principles for the application of exhaust emission control converter . especially in the research of noise suppression mechanism , a new conception of " equivalent design " for catalytic converter and muffler was revealed , which provided the theoretical basis for the optimization of exhaust noise suppression and engine power loss for light - duty vehicle 在排气净化器的理论研究方面，本文主要从排气净化器的净化机理、消声机理、载体的物化性能以及使用寿命等方面进行了讨论和分析，得出了排气净化器应用的理论依据，特别是在消声机理的研究方面，本文提出了一种全新的净化器与消声器的等效结构概念，为轻型汽车排气净化消声系统在降噪和发动机功耗方面的优化设计提供了理论基础。
The author studies the mechanism that automobile emission pollutant engenders and its inspection theory , from the perspective of simulating vehicle operating actually , the author treats acceleration simulation mode as test method by comparing and analyzing inspecting automobile emission method 作者对汽车排气污染物的生成机理和检测原理进行了深入研究，通过对检测汽车尾气方法的分析，从模拟车辆实际行驶的角度出发，确定了加速模拟工况法作为本测试系统的检测方法。
Computer fluid dynamics ( cfd ) is adopted to simulate the flow fields of catalytic converter while researching the working process of emission postprocessor . the velocity field and pressure field of exhaust gas are obtained . methods of structural optimization of catalytic converter for improving gas flow and conversion efficiency are proposed 本文在汽车排气后处理装置工作过程研究方面，运用计算流体动力学软件，对催化转化装置气流场开展了模拟，得出了气体速度场和压力场的分布情况，提出了以改善气体流动和催化转化效率的催化转化装置结构优化的方案。
