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Hydraulic control systems for dual clutch transmissions

A hydraulic control system, clutch technology, applied in clutches, transmission control, components with teeth, etc., to achieve good control, reduce complexity and cost, and improve the effect of shifting gears

Inactive Publication Date: 2013-12-11
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the heat generated typically requires correspondingly larger and more complex cooling components capable of dissipating larger amounts of heat
Finally, since these transmissions typically have multiple sets of axially aligned meshing gears, the overall length of the transmission may limit the transmission's use to certain vehicle designs

Method used

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  • Hydraulic control systems for dual clutch transmissions
  • Hydraulic control systems for dual clutch transmissions
  • Hydraulic control systems for dual clutch transmissions

Examples

Experimental program
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Embodiment Construction

[0090] The following description is merely exemplary in nature and is not intended to limit the invention, its application or uses.

[0091] refer to figure 1 , an exemplary dual clutch automatic transmission incorporating the present invention is shown and generally designated by the reference numeral 60 . The dual clutch transmission 60 includes a typically cast metal housing 12 that encloses and protects the various components of the transmission 60 . Housing 12 includes a plurality of bores, passages, shoulders and flanges (not shown) that locate and support these components of transmission 60 . The transmission 60 includes an input shaft 14 that receives motive power from a prime mover (not shown) such as a gasoline or diesel internal combustion engine or a hybrid or electric drive and one or two output shafts 16 that drive the main The reduction gear assembly 18 , the final drive assembly 18 may include a propshaft, a differential, and a drive shaft. The input shaft 1...

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PUM

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Abstract

Hydraulic control systems for a dual clutch transmission include a regulated source of pressurized hydraulic fluid including an electric pump, a filter and an accumulator, a pair of pressure control valves and a branching hydraulic circuit including pressure or flow control valves, spool or logic valves and two position valves which collectively supply and exhaust hydraulic fluid from a plurality of shift actuators. The actuators are connected to shift rails which include shift forks and are slidable to engage synchronizers and positive clutches associated with the various gear ratios.

Description

technical field [0001] The present invention relates to a hydraulic control system, and more particularly to a hydraulic control system for a dual-clutch transmission and components thereof. 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 automotive transmission technology, the dual clutch transmission (DCT) is a relatively new concept. A typical configuration of a dual clutch transmission includes a pair of mutually exclusive operating input clutches that drive a pair of input shafts. The input shaft may be disposed on an opposite side of the output shaft, or may be concentrically disposed between spaced apart output shafts. One of the pairs of continuously meshing gears providing various forward and reverse gear ratios is freely rotatable on one of the shafts, while the other of each pair is Coupled to one of the other axes. A plural...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H61/38F16H61/12F16H59/02
CPCF16H61/0206F16D48/0206F16D2048/0203F16H2061/0034F16D2048/0221F16H61/30F16H61/688Y10T74/19228Y10T74/19251Y10T74/20024
Inventor P·C·隆德伯格B·M·奥尔森
Owner GM GLOBAL TECH OPERATIONS LLC