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Differential lubricant temperature controller

A controller and lubricant technology, applied in the direction of gear lubrication/cooling, belt/chain/gear, transmission parts, etc. The effect of heating up and stabilizing the temperature

Inactive Publication Date: 2013-03-27
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, too high a viscosity will cause friction and churning losses, which can account for a significant portion of differential energy losses
The problem of energy damage due to high viscosity is especially serious during start-up in cold environments

Method used

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  • Differential lubricant temperature controller
  • Differential lubricant temperature controller
  • Differential lubricant temperature controller

Examples

Experimental program
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Embodiment Construction

[0027] The following description is merely exemplary in nature and is not intended to limit the invention, application or use.

[0028] now refer to figure 1 and 2 , shows a part of the rear axle of the drive train of the motor vehicle and is denoted by reference numeral 10 . The rear axle assembly 10 includes an elongated housing 12 including a pair of oppositely extending coaxial axle housings 14 that receive and support a pair of identical rear axles or half axles 16 . The rear axle assembly 10 also includes a spherical center housing 18 that houses a rear differential assembly 20 . It should be understood that while described herein as a rear differential, as this would be the more common application, the invention is equally suitable, suitable and usable for a front axle or differential of a motor vehicle.

[0029] The rear differential assembly 20 includes a hypoid gearset 22 having a worm or drive gear 24 that rotates about a vehicle longitudinal axis. Although desc...

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PUM

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Abstract

The invention is a device for controlling the temperature and thus the viscosity of the lubricating fluid in a rear axle or differential. A first embodiment of the device comprehends a curved bi-metal strip or plate disposed proximate the ring gear and closely conforming to it. The strip extends about the periphery of the ring gear in the direction of rotation of the gear when the vehicle is moving forward. As the temperature of the lubricating fluid increases or decreases, the bi-metal strip or plate moves to direct a larger or smaller flow of the lubricating fluid toward the housing through which heat is transferred to the atmosphere. In another embodiment, a bi-metal baffle disposed adjacent the ring gear includes a plurality of flaps which open upon a rise in lubricating fluid temperature and direct more fluid to the housing to assist heat dissipation.

Description

technical field [0001] The present invention relates to rear axles or differentials, and more particularly to devices for controlling or stabilizing the temperature of lubricating fluid in a rear axle or differential. 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] The powertrain in a conventional rear wheel drive vehicle consists of a rear axle or differential having a gear set that changes the axis of rotation of power flow from longitudinal to transverse and four bevel gears with a carrier, the bevel gears in for example The wheels and axles are allowed to spin at different speeds when the vehicle is cornering. Many 4WD vehicles also employ a differential in the front axle for the same purpose. [0004] Maintaining proper lubrication in a rear axle or differential, especially a hypoid gear set, is important and challenging. The lubricat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H57/04
CPCF16H57/0483F16H57/0423F16H57/0413
Inventor G·莫尔杜克霍维奇D·G·马多克
Owner GM GLOBAL TECH OPERATIONS LLC
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