商用车辆传动系统的概念—变速器对燃油消耗、噪声和舒适性的影响情况外文翻译本科学位论文VIP专享

Concepts for Commercial vehicle Drive Trains——Influence of Transmission on Consumption,Noise Level and Comfort[Abstract]The transmission has a considerable influence on fuel consumption noise level and com fort with in the vehicle d rive train. The selected examples taken from the ZF product rang show several transmission types in typical vehicle applications. The power weight ratio of current transmissions was considerably improved in all area s in comparison with previous versions. Improvements concerning noise levels and demands for higher comfort have become even more important. The fore fully automatic transmissions will achieve a larger share of the market. In the future, alternative drive train concepts such as electric wheel drives used in city buses will enhance the drive train product range.Key words: Commercial vehicle Transmission Fuel consumption Noise level ComfortIntroductionFour important aspects will determine commercial vehicles of the future:·Legislation (exhaust gasese /noise/ accident Prevention )·Different customer requirements (number Of variants )·Globalization of production and sales·Technologies, inparticular transmission technologyIn addition to the key engine developments with the object ive of satisfying the exhaust gas standards defined in EU Euro and EU Euro IV, the optmium configuration of the drive train is of → Diesel engines remain predom inant●Wider consumption characteristics curves●Torque levels of up to 3000Nm in the future→Comfort requirements as in passenger car●Reduction and harmonization of shift forces●Increased: automatic transmissions with optimum adaption to the combust on engine●M inmi ization of fuel consumption,emissions●Reductionin number of gears from 16 to 12 or ...