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Clutch actuation assembly with satellite pistons

A technology of actuating components and dual clutches, applied in the direction of clutches, fluid-driven clutches, non-mechanical drive clutches, etc., can solve the problems of increasing pistons and interference of other components

Inactive Publication Date: 2012-05-16
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One way to increase the applied force on the clutch is to increase the area of ​​the piston, but at a certain point the piston area can interfere with other components in the transmission

Method used

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  • Clutch actuation assembly with satellite pistons
  • Clutch actuation assembly with satellite pistons
  • Clutch actuation assembly with satellite pistons

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0051] Referring to the drawings, wherein like reference numerals refer to like parts, in figure 1 , the multi-speed transmission is generally indicated by reference numeral 10 . The transmission 10 is coupled to an engine input member 12 and includes an output member 14 . In this embodiment, the engine input member 12 is the engine crankshaft and the output member 14 is the housing of the differential assembly, however those skilled in the art will understand that the input member 12 could be something other than a shaft and the output The member 14 may be a component other than the housing of the differential assembly (eg, a shaft).

[0052] The engine input member 12 is continuously connected to a prime mover or engine (not shown) or other torque producing machinery to provide drive torque to the input member 12 . The output member 14 rotatably drives a differential assembly (not shown), which ultimately rotatably drives a pair of wheels (not shown).

[0053] The transmi...

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PUM

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Abstract

A dual clutch actuation assembly includes a housing, an annular central piston, a plurality of satellite pistons, and an annular apply member. The housing includes an inner cylindrical wall, an outer cylindrical wall, and a plurality of satellite cylindrical walls. The inner and outer walls define an inner piston annulus and the satellite walls define a plurality of satellite piston bores. Each of the satellite walls is disposed at least partially radially outward of the outer wall. The central piston is disposed in the inner piston annulus and is in sliding engagement with the inner and outer walls of the housing. The satellite pistons are disposed in the satellite piston bores and are in sliding engagement with the satellite walls of the housing. The apply member is axially engaged with each of the satellite pistons and includes an annular plate portion disposed radially outward of the outer cylindrical wall of the housing.

Description

technical field [0001] The present invention relates to clutch actuation assemblies, and more particularly to clutch actuation assemblies having a plurality of hydraulic pistons. 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] Automatic transmissions provide multiple forward and reverse speed or gear ratios by selectively actuating one or more brakes or clutches. A dual clutch transmission has two input shafts, each providing a subset of the available gear ratios. Each of the two input shafts is selectively coupled to the engine using one of these clutches. A typical dual clutch for engaging an input shaft may have concentric annular pistons for engaging two disconnect clutches. Each piston produces a force on the clutch that is a function of the pressure of the applied fluid and the area of ​​the piston. One way to increase the applied f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D25/00
CPCF16D25/083F16D25/10Y10T74/19228F16D21/06
Inventor D.A.威尔顿J.M.哈特H.瓦哈布扎德
Owner GM GLOBAL TECH OPERATIONS LLC