US-12623535-B2 - Torque vectoring device for a vehicle

US12623535B2US 12623535 B2US12623535 B2US 12623535B2US-12623535-B2

Abstract

A torque vectoring device for a vehicle includes: a differential; a first planetary gear device including a first rotating element fixed to a transmission case and a second rotating element connected to a differential case of the differential; a second planetary gear device including a first rotating element connected to a motor, and a third rotating element connected to a third rotating element of the first planetary gear device; and a selective connector configured such that a second rotating element of the second planetary gear device can be selectively connected to one of the third rotating element of the second planetary gear device and a selected drive shaft which is one of two drive shafts coupled to the differential.

Inventors

Dae Young Kim
Kwang Min Choi
Baek Yu Kim
Chul Min Ahn
Sung Gon Byun
Sun Sung KWON
Jun Hoi Huh

Assignees

HYUNDAI MOTOR COMPANY
KIA CORPORATION

Dates

Publication Date: 20260512
Application Date: 20230427
Priority Date: 20221109

Claims (14)

1 . A torque vectoring device for a vehicle, the torque vectoring device comprising: a differential; a first planetary gear device including: a first element fixed to a transmission case, and a second rotating element directly connected to a differential case of the differential; a second planetary gear device including: a first rotating element connected to a motor, and a third rotating element connected to a third rotating element of the first planetary gear device; and a selective connector configured to directly and selectively connect a second rotating element of the second planetary gear device to the third rotating element of the second planetary gear device or a selected drive shaft, wherein the selected drive shaft is a drive shaft among two drive shafts coupled to the differential.
2 . The torque vectoring device of claim 1 , wherein the first element of the first planetary gear device is a first ring gear, the second rotating element of the first planetary gear device is a first carrier, the third rotating element of the first planetary gear device is a first sun gear, and wherein the first rotating element of the second planetary gear device is a second ring gear, the second rotating element of the second planetary gear device is a second carrier, and the third rotating element of the second planetary gear device is a second sun gear.
3 . The torque vectoring device of claim 2 , wherein the selective connector comprises: a first clutch gear connected to the second sun gear; a second clutch gear connected to the second carrier; a hub gear provided on the selected drive shaft; and a sleeve configured to switch between a first state in which the sleeve slides straightly along an axial direction from the second clutch gear and thus meshes with the first clutch gear and a second state in which the sleeve meshes with the hub gear.
4 . The torque vectoring device of claim 3 , wherein the first planetary gear device and the second planetary gear device are disposed on a side on which the selected drive shaft is disposed with reference to the differential case.
5 . The torque vectoring device of claim 3 , wherein an input gear is connected to the first rotating element of the second planetary gear device, a drive gear is connected to a rotating shaft of the motor, and a first idler gear and a second idler gear are connected by a concentric shaft and are connected to the input gear and the drive gear, respectively.
6 . The torque vectoring device of claim 3 , wherein the first rotating element of the second planetary gear device is connected to the motor through a third planetary gear device configured to transfer power from the motor at a reduced speed.
7 . The torque vectoring device of claim 6 , wherein the motor is connected to supply power to a third sun gear of the third planetary gear device, the third planetary gear device has a third ring gear fixed to the transmission case, and the third planetary gear device has a third carrier directly connected to the first element of the first planetary gear device.
8 . A vehicle comprising the torque vectoring device of claim 1 , wherein the torque vectoring device is provided for predetermined wheels among front wheels and rear wheels of the vehicle, and a separate driving device is provided for remaining wheels among the front wheels and the rear wheels.
9 . A torque vectoring device comprising: a differential; a first planetary gear device including: a first rotating element directly connected to a differential case of the differential, a second element fixed to a transmission case, and a third rotating element directly connected to a connecting member; a second planetary gear device including: a fourth rotating element connected to a motor to receive power from the motor, a fifth rotating element directly connected to the connecting member and a first clutch gear, and a sixth rotating element directly connected to a second clutch gear; and a selective connector configured to selectively connect the second clutch gear to the first clutch gear or a selected drive shaft which is one of two drive shafts coupled to both sides of the differential.
10 . The torque vectoring device of claim 9 , wherein the selective connector comprises: a hub gear provided integrally with the selected drive shaft; and a sleeve configured to switch between a first state in which the sleeve slides straightly along an axial direction while meshing with the second clutch gear and thus meshes with the first clutch gear and a second state in which the sleeve meshes with the hub gear.
11 . The torque vectoring device of claim 10 , wherein the second element is a first ring gear fixed to the transmission case, the first rotating element is a first carrier connected to the differential case of the differential, and the third rotating element is a first sun gear connected to the connecting member, and wherein the fourth rotating element is a second ring gear configured to receive the power from the motor, the sixth rotating element is a second carrier connected to the second clutch gear, and the fifth rotating element is a second sun gear connected to the connecting member and the first clutch gear.
12 . The torque vectoring device of claim 11 , wherein the first planetary gear device and the second planetary gear device are installed on one side of the differential case to be adjacent to each other, and the selective connector is provided between the second planetary gear device and the selected drive shaft.
13 . The torque vectoring device of claim 11 , wherein the motor is connected to the first ring gear in an external gear type.
14 . The torque vectoring device of claim 11 , wherein the motor is connected to transfer power at a reduced speed to the first ring gear by using a third planetary gear device.

Description

CROSS-REFERENCE TO RELATED APPLICATION(S) This application claims priority under 35 U.S.C. 119 to Korean Patent Application No. 10-2022-0148986, filed on Nov. 9, 2022, the disclosure of which is herein incorporated by reference in its entirety. BACKGROUND 1. Field The present disclosure relates to a technology for implementing vehicle torque vectoring. 2. Description of the Prior Art Vehicles not only travel in straight, but also turns as a result of steering a steering wheel. While a vehicle is turning, a difference in speed between an inner wheel and an outer wheel occurs. As such, a differential is used for driving wheels of the vehicle to allow such a speed difference between left and right driving wheels. The differential is a passive device that mechanically allows a speed difference between left and right driving wheels according to the difference in resistance occurring at the left and right driving wheels when the vehicle turns. Differentials have the advantage of facilitating vehicle's turns but have a drawback in that a vehicle having the differentials is difficult to escape from rough terrain or the like, which causes a substantial difference in road surface friction between the left and right driving wheels. In order to overcome the above-mentioned drawback, differential motion limiting devices or the like are used to limit the differential function of differentials. There has recently been development of torque vectoring technology such that the torque applied to left and right driving wheels is actively controlled according to the vehicle traveling situation, thereby further improving the vehicle traveling performance. The statements in this BACKGROUND section merely provide background information related to the present disclosure and may not constitute prior art. SUMMARY In an aspect of the present disclosure, a torque vectoring device for a vehicle is provided. In particular, torque vectoring of both driving wheels can be controlled by a relatively simple configuration such that the vehicle traveling performance can be improved, thereby ultimately improving the value of the vehicle. In accordance with an aspect of the present disclosure, a torque vectoring device of a vehicle may include: a differential; a first planetary gear device including a first rotating element fixed to a transmission case, and a second rotating element connected to a differential case of the differential. The vectoring device further includes: a second planetary gear device including a first rotating element connected to a motor, and a third rotating element connected to a third rotating element of the first planetary gear device; and a selective connector configured to selectively connect a second rotating element of the second planetary gear device to the third rotating element of the second planetary gear device or a selected drive shaft which is one of two drive shafts coupled to the differential. The first rotating element of the first planetary gear device may be a first ring gear, the second rotating element of the first planetary gear device may be a first carrier, the third rotating element of the first planetary gear device may be a first sun gear. In one form, the first rotating element of the second planetary gear device may be a second ring gear, the second rotating element of the second planetary gear device may be a second carrier, and the third rotating element of the second planetary gear device may be a second sun gear. The selective connector may include: a first clutch gear connected to the second sun gear; a second clutch gear connected to the second carrier; a hub gear provided on the selected drive shaft; and a sleeve configured to be able to switch between a first state in which the sleeve slides straightly along an axial direction from the second clutch gear and thus meshes with the first clutch gear and a second state in which the sleeve meshes with the hub gear. The first planetary gear device and the second planetary gear device may be disposed on a side on which the selected drive shaft is disposed with reference to the differential case. An input gear may be connected to the first rotating element of the second planetary gear device, a drive gear may be connected to a rotating shaft of the motor, and a first idler gear and a second idler gear may be connected by a concentric shaft and are connected to the input gear and the drive gear, respectively. The first rotating element of the second planetary gear device may be connected to the motor through a third planetary gear device configured to transfer power from the motor at a reduced speed. The motor may be connected to supply power to a third sun gear of the third planetary gear device, the third planetary gear device may have a third ring gear fixed to a transmission case, and the third planetary gear device may have a third carrier directly connected to the first rotating element of the first planetary gear device. In accordance with