摘要:长期以来,汽车工业发达国家对汽车噪声控制问题给予了高度重视,汽车噪声控制水平必将成为决定车型开发成功与否的不可或缺的重要因素之一。积累了较为丰富的理论与技术研究成果和解决问题的工程实践经验。然而,由于问题的复杂性,该领域目前仍然存在着大量的理论和技术空白,其中有许多是世界性的难题,这意味着相对于汽车技术的其他方向,在汽车噪声控制领域中,目前尚未形成被发达国家技术垄断的格局。国内汽车行业应当充分把握这一时机,在跟踪、学习国外先进技术以形成“后发优势”的同时,通过自主创新,力求在短期内取得某些方面的率先突破,从而带动汽车噪声控制技术的整体跨越式发展。

　　　本设计阐述了排气系统的整体设计，主要内容有设计依据，消声器的设计，三元催化转换器的选用，排气系统尺寸的确定。

　　　在众多毕业设计题目中我之所以选择排气系统设计是因为我觉得环保是现代的大趋势，而排气系统正正与环保切切相关。本论文阐述了中高级轿车排气系统的设计过程要相关要点，着重介绍了消声器的相关设计。

关键词：汽车噪声，排气系统，消声器

Abstract:Long-term since, automobile industry developed countries to automobile noise control problem given attention, automobile noise control level will be decided to the success of the development model of an important factor. Accumulated relatively rich theory and technology research and problem solving practical engineering experience. However, due to the complexity of the problems in this field, there still exist a lot of theory and technology, including many worldwide problem, this means that the relative to other direction, automotive technology in the field of automobile noise control, has formed by developed countries technology monopoly pattern. Domestic automobile industry should take full advantage of this opportunity, on track, learn foreign advanced technology to form late-developing advantages, through the independent innovation, strive to obtain certain aspects in the short term, thus promote the noise control technology of integral great-leap-forward development.

　　　This design is expounded the overall design, exhaust system is designed according to the main contents of the muffler design, selection of the purifier, the sizes of the exhaust system

　　　Graduation design in numerous questions but I chose the exhaust system design, because I think the trend of environmental protection is a modern and exhaust system is related to environmental earnestly. This paper expounds the design luxury-class passenger cars exhaust system to process, introduces emphatically the muffler design

Keywords：Automobile noise, exhaust systems, muffler