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Motor-assisted transmission

A technology of electric motors and engines, which is applied in the field of power trains and can solve problems such as inherent noise

Active Publication Date: 2012-07-04
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Also, the low gear ratios in a manual transmission are inherently noisy when the engine is running at low speeds when starting off

Method used

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Embodiment Construction

[0009] Referring to the drawings, a powertrain 10 is shown including an engine 12 and a transmission 14 . As will be described further, the transmission 14 includes an electric motor / generator 16 that is used to provide additional torque to the powertrain 10 so that the engine 12 can output at its most efficient operating point at an output normally associated with a low fixed gear in a manual transmission. Operate within the speed range.

[0010] The engine 12 has an engine crankshaft 18 selectively connectable via engagement of a first clutch 19 to provide torque to an input shaft 20 (also referred to herein as an input member). Engagement of the first clutch 19 is maintained until selectively disengaged by the vehicle operator, typically by depressing a foot pedal or other operator input device to disconnect the engine crankshaft 18 from the input shaft 20, or by the action of the controller 22, which An actuator (not shown) is energized to hydraulically engage clutch 19 ....

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Abstract

A powertrain has an engine with a crankshaft. The powertrain includes a planetary gear set having a first, a second, and a third member. The first member is connected for common rotation with an input member. A first clutch is selectively engageable to operatively connect the crankshaft with the input member. A second clutch is selectively engageable to ground the input member with a stationary member. An electric motor / generator has a rotor operatively connected for common rotation with the second member. An output member is provided, with a set of intermeshing gears configured to transfer torque from the third member to the output member. A first gear pair and a second gear pair are operable by engagement of a first synchronizer and a second synchronizer, respectively, to provide two different fixed ratios between the input member and the output member.

Description

technical field [0001] The invention relates to a powertrain with a manual transmission and with a motor / generator. Background technique [0002] Traditional manual transmissions use a driver-operated clutch and a shift lever that is manually shifted by the driver's hand. The clutch is disengaged when the shift fork moves the synchronizer to engage a different gear that establishes a different fixed speed ratio (ie, a different gear ratio) through the transmission. At low gear ratios, drivers typically expect greater torque or speed than the transmission is designed to provide. During these gear ratios, this causes the driver to depress the accelerator pedal too much, reducing fuel consumption. Also, the low gear ratios in a manual transmission are inherently noisy when the engine is running at low speeds when starting off. Contents of the invention [0003] The transmission is provided with an electric motor / generator operated to start the transmission and cooperate wi...

Claims

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Application Information

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IPC IPC(8): F16H3/44B60K6/365B60K6/387
CPCB60K2006/4816F16H2200/0034B60K2006/381Y02T10/6256B60K6/48F16H2200/2005F16H3/725Y02T10/6221Y02T10/62
Inventor A.蒂瓦里R.格夫A.K.阿格拉瓦尔M.库玛V.B.沙玛
Owner GM GLOBAL TECH OPERATIONS LLC
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