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Multi-speed transmission

A technology of transmission and speed, applied in the direction of vehicle gearbox, multi-ratio transmission, transmission, etc.

Active Publication Date: 2014-08-06
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, certain types of engines can only operate efficiently within a narrow speed range

Method used

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  • Multi-speed transmission
  • Multi-speed transmission
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Examples

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Embodiment Construction

[0034] This specification describes embodiments of the invention. It should be understood, however, that the disclosed embodiments are merely examples, which may be embodied in various alternative forms. The figures are not necessarily to scale; some features may be exaggerated or minimized to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention. Those skilled in the art will appreciate that various features illustrated and described with reference to any one figure may be combined with features illustrated in one or more other figures to form embodiments not explicitly illustrated or described. The combination of features described provides a representative embodiment for a typical application. However, various combinations and modifications of the features consisten...

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Abstract

The invention discloses a multi-speed transmission. A family of transmission gearing arrangements produces up to nine forward and one reverse speed ratios by selective engagement of three shift elements in various combinations. Each disclosed transmission includes four planetary gear sets and six elements. Two of the arrangements feature planetary gear sets that are separated radially and are particularly suited to applications that require reduced axial length.

Description

technical field [0001] The invention relates to the field of automatic transmissions for motor vehicles. More specifically, the present invention relates to the arrangement of gears, clutches and their interconnection in power transmission. Background technique [0002] Many vehicles are used over a wide range of vehicle speeds, including both forward and reverse movement. However, certain types of engines can only operate efficiently within a narrow speed range. Therefore, transmissions capable of efficiently transmitting power at multiple speed ratios are frequently used. When the vehicle is at lower speeds, the transmission typically operates at a high gear ratio to multiply engine torque for improved acceleration. When the vehicle is at higher speeds, the transmission operates at low gear ratios to allow engine speeds associated with quiet, fuel-efficient cruising. Typically, a transmission has a housing mounted to the vehicle's structure, an input shaft driven by th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H3/66
CPCF16H3/66F16H2200/201F16H2200/0065F16H2200/2046F16H2003/442F16H2003/445F16H2200/2012F16H3/62
Inventor 斯蒂芬·杰拉德·托马斯雷德·阿兰·鲍德温
Owner FORD GLOBAL TECH LLC