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Dual-mode electrically variable transmission with offset electric motor and two planetary gearsets

A technology of planetary gear sets and gear sets, which is applied in the direction of elements with teeth, the arrangement of multiple different prime movers of general power plants, and vehicle gearboxes, which can solve the problems of increasing vehicle costs and packaging space requirements

Inactive Publication Date: 2017-01-18
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, additional components such as planetary gear sets, brakes and / or clutches required for a hybrid powertrain increase overall vehicle cost and packaging space requirements

Method used

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  • Dual-mode electrically variable transmission with offset electric motor and two planetary gearsets
  • Dual-mode electrically variable transmission with offset electric motor and two planetary gearsets
  • Dual-mode electrically variable transmission with offset electric motor and two planetary gearsets

Examples

Experimental program
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Embodiment Construction

[0010] Referring to the drawings, wherein like reference numerals indicate like parts, figure 1 A powertrain 10 is shown comprising a power source, in this embodiment an engine 12 , operatively connected to an electrically-variable transmission 14 . The engine 12 has an output member 18 , such as a crankshaft, operatively connected for common rotation with an input member 21 of the transmission 14 . The crankshaft 18 may be directly connected to the input member 21 or a clutch, a buffer member or a torque converter may be used to connect the engine output member 18 to the input member 21 .

[0011] The transmission 14 includes a compound planetary gear set, which may be a first planetary gear set 20 and a second planetary gear set 30 . The transmission 14 also includes a first motor / generator 40 , a second motor / generator 50 , a first meshing gear set 60 , a second meshing gear set 70 , and first and second torque-transmitting mechanisms 80 , 82 . With these components, inpu...

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PUM

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Abstract

A hybrid powertrain has an electrically variable transmission with a compound planetary gear set, which may be only two planetary gear sets. The two members of the first planetary gear set are connected for common rotation with the two members of the second planetary gear set. A first motor / generator is connected for common rotation with a member of the first planetary gear set and a member of the second planetary gear set. The input member is connected to another member of the first planetary gear set. A first meshing gear set includes a gear connected for common rotation with a gear of a second planetary gear set and a second gear driven by a second motor / generator. The second meshing gear set includes another gear that drives the output member. A first clutch is engageable to establish an input-split mode. A second clutch is engageable to establish a compound-split mode.

Description

technical field [0001] The present invention generally includes an electrically variable transmission having two planetary gear sets and two motor / generators. Background technique [0002] A hybrid powertrain for a vehicle utilizes different power sources under different vehicle operating conditions. A hybrid powertrain with an electrically variable transmission (which can provide an input-split mode of operation and a separate compound-split mode of operation) typically has three planetary gear sets and one or more electric motor / generators. The input-split mode of operation has a single transmission ratio, where the motor / generator does not need to supply mechanical power to allow power to be transferred from the input to the output, and the compound-split mode of operation has two such ratios. That is, at one specific ratio of input speed to output speed in input-split mode and two specific ratios in compound-split mode, power is transferred from the input to the output ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H3/46
CPCB60K6/365B60K6/445B60K6/547F16H3/728F16H2037/101F16H2037/102F16H2200/2007Y02T10/62
Inventor A.G.霍姆斯B.M.康伦N.舍尼克
Owner GM GLOBAL TECH OPERATIONS LLC
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