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Low cost torque vectoring system

A technology for guiding the system, driving torque, used in the field of drive shafts and drive train components, differentials

Inactive Publication Date: 2010-01-06
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The relatively high price of currently available torque vectoring systems limits the application of torque vectoring technology to premium motor vehicles where the cost of such systems would be covered in the sticker price

Method used

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  • Low cost torque vectoring system

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Embodiment Construction

[0012] refer to figure 1 A torque vectoring driveline 10 has as its major component a conventional automotive differential unit 12 drivably coupled to a continuously variable transmission (CVT) 14 . The combination of the differential unit 12 and the continuously variable transmission 14 provides active overdrive or underdrive for the first drive wheels 16 of the motor vehicle 17 .

[0013] Power is supplied to the pinion via drive shaft 20, which is powered by the vehicle engine (not shown), transmission (not shown) and other driveline components. The pinion 22 meshingly engages the bevel gear 24 by meshing the pinion 22 with the gear teeth of the bevel gear 24 . The carrier 28 is fixed to or is part of the bevel gear 24 such that the carrier 28 rotates with the bevel gear 24 as a unit. A plurality of planet gears forming differential gear assembly 26 are housed within carrier 28 . Two opposing planet gears 30 of the differential gear assembly 26 are rotatably fixed to the...

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Abstract

A torque vectoring drive system is presented for use in a motor vehicle. The torque vectoring drive system includes a differential unit having an input shaft, a first axle shaft, a second axle shaft, and a carrier, the differential rotatably driving the axle shafts while permitting the axle shafts to have independent speeds of rotation. The system includes a continuously variable transmission (CVT) having an input shaft driveably coupled to the carrier of the differential and an output shaft driveably coupled to the first axle shaft of the differential. The CVT is operable to variably control the drive torque of the first axle shaft relative to the second axle shaft to provide torque vectoring.

Description

technical field [0001] This application relates to differentials, drive shafts and drive train assemblies used to transmit power to the drive wheels of a motor vehicle, and more particularly to drive shafts equipped with torque vectoring drive systems for on-board The available drive torque is selectively distributed or directed between the drive wheels of the motor vehicle. Background technique [0002] It is known to apply torque vectoring drivetrains to motor vehicles, for example with applications using AWD (All Wheel Drive) technology. AWD drive offers well-recognized benefits to motor vehicle traction and handling in adverse weather conditions (on-road and off-road). [0003] Torque vectoring is the ability of a motor vehicle driveline to selectively and dynamically increase the rotational speed of one driven shaft relative to a second, opposing driven shaft, thereby enhancing vehicle handling and cornering capabilities. The effect is similar to that of stability con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60K17/16B60K17/06
CPCF16H2009/166B60K17/16F16H48/08F16H48/20
Inventor J·M·马圭尔
Owner GM GLOBAL TECH OPERATIONS LLC
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