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Transmission clutch assembly with whistling reduction technology

A technology for clutches and transmissions, applied in clutches, fluid-driven clutches, non-mechanical drive clutches, etc., can solve problems such as energy loss and low efficiency, and achieve the effect of reducing vibration and reducing vibration

Inactive Publication Date: 2016-09-14
FORD GLOBAL TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this arrangement is less efficient than the teaching of the present invention due to the need to increase the mass around the entire clutch hub circumference; and, the connection between the clutch hub and the damping ring requires a friction coupling, which also results in unnecessary energy loss

Method used

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  • Transmission clutch assembly with whistling reduction technology
  • Transmission clutch assembly with whistling reduction technology
  • Transmission clutch assembly with whistling reduction technology

Examples

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Embodiment Construction

[0025] Referring to the drawings, there are shown different embodiments of a vehicle transmission clutch assembly implementing improved squeal reduction technology, like symbols denoting like or corresponding parts throughout the views. Significant noise reduction is achieved through the use of a set of mass dampers in the clutch assembly. The mass damper changes the vibration pattern of the clutch gears during engagement, thereby reducing the noise output during shifting. Mass dampers are connected to different clutch packs. Exemplary clutch assemblies with mass dampers attached are illustrated as clutch gears, clutch hubs, or pistons. Different types of mass dampers are also compatible with clutch packs shown or not shown. In one embodiment, for example, the damper is a sprung mass damper coupled to a clutch gear. In certain embodiments, the use of sprung mass dampers allows for multi-directional vibration control. Embodiments with sprung mass dampers have a dual functio...

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Abstract

The assembly (450) has a clutch component e.g. clutch gear (470), rotated with respect to a transmission shaft e.g. output shaft (480). A set of multi-directional mass dampers (460) i.e. sprung mass dampers, is coupled to the clutch component with inner diameter, and alters a mode of vibration for the clutch component during clutch engagement, where the mass dampers are separated by ninety degrees on the clutch component. The mass dampers applies localized force to the clutch component with arc degree less than or equal to five degrees. An independent claim is also included for a method for manufacturing a transmission clutch assembly with reduced squawk during engagement.

Description

technical field [0001] This invention relates to squeal (or noise) reduction in vehicle transmission clutch assemblies. Background technique [0002] A modern transmission includes a clutch assembly to control the relative rotational speed of the vehicle's wheels relative to the engine rotational speed. These clutch assemblies include rotating members that alternate between engaged and disengaged positions. During clutch engagement, the clutch components may vibrate relative to the main drive shaft. This vibration can result in an annoying noise commonly referred to as "squawk". Many existing transmissions seek to reduce squeal by improving transmission lubrication or using electromechanical shift control (or electronic shifting). However, it would be more effective to increase the mass of one or more clutch assembly components to alter the vibration pattern of the clutch assembly during engagement. [0003] US Patent No. 7,163,095, entitled "Clutch Assembly with Damper"...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H57/028
CPCF16D25/0638F16D25/12F16D2300/22F16F15/1336F16F15/1421
Inventor 吉姆·陈卡尔·加尔巴齐克葛彤曾昭文
Owner FORD GLOBAL TECH LLC
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