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首页> 外文期刊>SAE International Journal of Passenger Cars - Mechanical Systems >7-XDCT: Compact and Cost-Efficient Dual Clutch Transmission for Small and Mid-Size Vehicles
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7-XDCT: Compact and Cost-Efficient Dual Clutch Transmission for Small and Mid-Size Vehicles

机译：7-XDCT：适用于中小型车辆的紧凑且经济高效的双离合器变速器

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摘要

The automotive industry continues to develop new powertrain technologies aimed at reducing overall vehicle level fuel consumption. The ongoing trends of "downsizing" and "down speeding" have led to the development of turbocharged engines with low displacement and high torque density. In order to meet the launch response requirements with these engines as well as fuel economy needs, transmissions with large ratio spreads will need to be developed. Due to the lack of torque amplification from the torque converter, the next generation of dual clutch transmissions (DCT) will need to have larger launch ratios and ratio spreads than currently available in production today. This paper discusses the development of a new family of DCT (called "xDCT") for use in front wheel drive vehicles, aimed at meeting some of these challenges. The xDCT family features two innovative concepts, the idea of "gear generation" and "supported shifts". A combination of these features results in the development of a highly compact and efficient family of DCTs. The paper will begin with a definition of the xDCT concept followed by a layout of the gear sets for 7 and 10 speed versions of this transmission. Simulation results are used to show the powershift capability as well as efficiency of the developed transmission concept. Finally, a 3D design study is utilized to demonstrate key features of the transmission concept that will result in a highly efficient and compact transmission with low mechanical complexity and full powershift capabilities.
机译：汽车工业继续开发新的动力总成技术，以减少总体车辆油耗。 “减小尺寸”和“减小速度”的持续趋势导致了低排量和高扭矩密度的涡轮增压发动机的发展。为了满足这些发动机的启动响应要求以及燃油经济性需求，将需要开发具有大传动比的变速器。由于液力变矩器缺少扭矩放大功能，因此下一代双离合器变速箱（DCT）的发动比和传动比差需要比目前生产的更大。本文讨论了用于前轮驱动车辆的DCT新系列（称为“ xDCT”）的开发，旨在应对其中的一些挑战。 xDCT系列具有两个创新概念，即“齿轮生成”和“支持换档”的概念。这些功能的组合导致开发出高度紧凑和高效的DCT系列。本文将首先定义xDCT概念，然后是该变速箱7和10速版本的齿轮组布局。仿真结果用于显示动力换挡能力以及开发的变速箱概念的效率。最后，通过3D设计研究来证明变速箱概念的关键特征，这将导致高效而紧凑的变速箱，而机械复杂度却较低，并且具有完整的动力换挡能力。

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