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Multi-speed transmission with eight torque-transmitting mechanisms

A technology of torque transmission mechanism and transmission, which is applied in the direction of mechanical equipment, transmission devices, gear transmission devices, etc., can solve problems such as blocking use, achieve acceleration and fuel efficiency improvement, improve operating performance and fuel economy, and improve shift quality Effect

Active Publication Date: 2015-06-17
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the often increased complexity, size and cost of such transmissions are adverse factors which may prevent the use of these transmissions in some applications

Method used

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  • Multi-speed transmission with eight torque-transmitting mechanisms
  • Multi-speed transmission with eight torque-transmitting mechanisms

Examples

Experimental program
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Effect test

Embodiment Construction

[0050] Reference is made to the drawings, wherein like reference numerals refer to like parts. figure 1 A powertrain 10 is shown having an engine 12 (designated E), a combined layshaft and planetary transmission 14 and a final drive mechanism 16 (designated FD). Engine 12 may be powered by various types of fuel to improve efficiency and fuel economy for a particular application. For example, these fuels may include: gasoline, diesel, ethanol, dimethyl ether, and the like. The transmission 14 includes an input member 17 constantly connected to an output member of the engine 12 , such as a crankshaft, optionally through a torque converter. The transmission 14 also includes five sets of intermeshing gears as described below, an intermediate member 50, a first layshaft 52, a second layshaft 54, a first planetary gear set 20 and is connected to the final drive mechanism 16 to provide propulsion to the wheels. The output component 19.

[0051] Simple planetary gear set 20 include...

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PUM

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Abstract

A transmission includes an input member, an output member, an intermediate shaft, and a simple planetary gear set, all of which are coaxial. A first and a second layshaft are arranged to define a second axis of rotation and a third axis of rotation, respectively. The transmission has five sets of intermeshing gears, some of which are arranged to transfer torque from the input member to the layshafts, and others of which are arranged to transfer torque from the layshafts to the intermediate member or the simple planetary gear set. The transmission has eight torque-transmitting mechanisms, including one torque-transmitting mechanism that is selectively engagable to connect the input member for common rotation with the intermediate member. The other seven torque-transmitting mechanisms are each selectively engagable to connect a different respective gear of the sets of intermeshing gears to a respective one of the layshafts or to a stationary member.

Description

[0001] This application claims the benefit of Russian Patent Application No. 2010110532 filed on March 19, 2010, which is hereby incorporated by reference in its entirety. technical field [0002] The present invention relates to a multi-speed planetary transmission having a layshaft with gears establishing five sets of intermeshing transfer gears and a simple planetary gear set. Background technique [0003] A motor vehicle includes a powertrain consisting of an engine, a multi-speed transmission and a differential or final drive. Multi-speed transmissions increase the overall operating range of a motor vehicle by allowing the engine to operate multiple times through its torque range. The number of forward speed ratios available in the transmission determines the number of times the engine torque range is repeated. Early automatic transmissions had two speed ranges. This severely limits the overall speed range of the vehicle, thus requiring a fairly large engine capable o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H3/44
Inventor A. F. 克雷内夫V. K. 阿斯塔谢夫K. B. 萨拉曼德拉M. 拉哈文
Owner GM GLOBAL TECH OPERATIONS LLC