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Countershaft clutch and gear assembly

A technology for intermediate shafts and clutches, applied to clutches, fluid-driven clutches, non-mechanical-driven clutches, etc., can solve problems such as loss of connection between the engine and the drive wheel, damage to the synchronizer, etc., to reduce the possibility of transients and reduce inertia Effect

Inactive Publication Date: 2012-04-25
GENERAL MOTORS COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the range clutch engages before the countershaft speeds are fully synchronized and the positive clutch engages, the engine to drive wheels connection will be lost and synchronizer failure will occur

Method used

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  • Countershaft clutch and gear assembly
  • Countershaft clutch and gear assembly
  • Countershaft clutch and gear assembly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The following description is merely illustrative in nature and does not limit the disclosure, its application or uses.

[0018] see figure 1 , which illustrates a portion of a dual clutch transmission (DCT) and is indicated generally at 10 . The dual clutch transmission 10 includes a preferably cast metal housing 12 having a plurality of openings, ports, counterbores, shoulders, flanges and other features that receive, support and position the various components of the transmission 10 . For example, an input shaft 16 driven by an output of a torque converter (not shown) is rotatably supported on a tapered roller bearing assembly 18 and includes an input drive gear 20 . The input drive gear 20 is in continuous mesh with a pair of countershaft drive gears, a first countershaft drive gear 22A and a second countershaft drive gear 22B. Countershaft drive gears 22A and 22B are each freely rotatably disposed on a respective pair of countershafts: a first countershaft or coun...

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PUM

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Abstract

The present invention provides a low inertia clutch and gear assembly for disposition on a countershaft of a dual clutch automatic transmission (DCT). The assembly includes a gear which is in constant mesh with a gear secured to the input shaft of the transmission and which is freely rotatably disposed on one of the countershafts or lay shafts. The lower inertia components of the clutch, i.e., the clutch hub and the smaller diameter friction plates are secured to the countershaft whereas the higher inertia components, i.e., the clutch housing, the larger diameter friction plates, the reactionplate, the piston and the return springs, rotate with the gear.

Description

technical field [0001] The present disclosure relates to clutch and gear assemblies, and more particularly to low inertia clutch and gear assemblies on countershafts for use in dual clutch automatic transmissions. 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] A relatively new type of automatic transmission is called a dual countershaft or dual clutch transmission (DCT). In a double countershaft transmission, a pair of countershafts or layshafts are arranged on opposite sides of a common axis of the input and output shafts and in the same plane. A typical dual countershaft transmission is a torque-split device in which both countershafts carry the load. This requires the axes to be in the same plane as described above. [0004] In other dual countershaft transmission configurations, only one countershaft carries the load at a time. The i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H3/10F16D25/0638
CPCF16H2200/0043F16H3/006F16H3/097F16H2200/0004Y10T74/19233Y10T74/19223
Inventor J·A·拉什科夫斯基
Owner GENERAL MOTORS COMPANY