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Vehicle launch device having fluid coupling

A coupling device, fluid technology, applied in the direction of the arrangement of multiple different prime movers of fluid transmission devices, transmission devices, general power devices, etc.

Inactive Publication Date: 2014-01-29
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This loss is reduced but still present as the hydrodynamic fluid drive approaches a 1:1 speed ratio at high speeds and low torques

Method used

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  • Vehicle launch device having fluid coupling
  • Vehicle launch device having fluid coupling
  • Vehicle launch device having fluid coupling

Examples

Experimental program
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Effect test

Embodiment Construction

[0059] refer to figure 1 , generally indicated at 10 a powertrain in accordance with the principles of the present invention. The powertrain 10 includes a first or primary power source 12 , a second or secondary power source 14 , a fluid coupling 16 , a transmission 18 and a final drive 20 . In the example provided, the first power source 12 is an internal combustion engine, however, the first power source 12 could be an electric motor or electric machine without departing from the scope of the present invention. The first power source 12 includes an output member 22 . The first power source 12 is operable to provide output torque or power to the output member 22 . The second power source 14 is preferably an electric machine having a stator and a rotor, as is known in the art.

[0060] The fluid coupling 16 includes a pump portion 24 and a turbine portion 26 . Fluid coupling 16 includes hydraulic fluid, such as oil, within pump portion 24 and turbine portion 26 and hydrody...

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PUM

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Abstract

A method of controlling an automatic shifting power transmission having a fluid coupling device, at least one reaction clutch disposed in series with the fluid coupling device, and an electric machine disposed in series with the fluid coupling device and the at least one reaction clutch includes energizing the electric machine to provide additional torque to the first gear reaction clutch when the automatic shifting power transmission is in a first gear launch maneuver and partially engaging the at least one reaction clutch corresponding to a first gear engagement to effect the first gear launch maneuver when engine load is at or above a predetermined value. The at least one reaction clutch corresponding to the first gear engagement is fully engaged when engine load is below the predetermined value.

Description

technical field [0001] The present invention relates to mechanisms and methods for controlling an automatically shifting power transmission. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may or may not constitute prior art. [0003] In an automatic shifting power transmission, ratio changes are achieved by selectively connecting members of the planetary gear sets. This is accomplished by selectively engaging a torque transmitting device such as a brake or clutch. For each gear ratio change, there is a corresponding sequence of disengagement of the off-going clutch and engagement of the oncoming clutch. Smooth engagement and disengagement of the clutch is achieved by providing a modulating fluid pressure gain to the clutch. [0004] In addition, most automatic shifting power transmissions employ a hydrodynamic fluid drive, such as a torque converter or fluid coupling, between a power...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/04F16H61/14B60K6/48B60W10/02B60W10/08
CPCF16H61/143F16H2045/0252B60W10/026B60K6/48B60W10/08Y02T10/6221B60L2260/12B60W20/00Y02T10/62F16H2200/0021B60Y2200/91B60W30/19B60W10/115
Inventor V·M·罗西斯J·C·舒尔茨
Owner GM GLOBAL TECH OPERATIONS LLC