Power transmission apparatus of hybrid electric vehicle

• US 10,272,764 B2
• Filed: 12/08/2016
• Issued: 04/30/2019
• Est. Priority Date: 09/07/2016
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: Lee, Kyeong Hun, Kim, Jong Soo, Park, Jong Sool, Hwang, Dong Hwan
• Primary Examiner(s): Shapiro, Jeffrey A
• Application Number:
  US15/372,632
• Publication Number:
  US 20180065467A1
• Time in Patent Office: 873 Days
• CPC Class Codes: B60K 2006/4825 Electric machine connected or connectable to gearbox input shaft
• CPC Class Codes: B60K 6/365 with the gears having orbital motion
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60K 6/543 the transmission being a continuously variable transmission
• CPC Class Codes: B60K 6/547 the transmission being a stepped gearing
• CPC Class Codes: B60Y 2200/92 Hybrid vehicles
• CPC Class Codes: B60Y 2400/72 Continous variable transmissions [CVT]
• CPC Class Codes: B60Y 2400/73 Planetary gearings
• CPC Class Codes: F16H 2200/0039 the gear ratios comprising three forward speeds
• CPC Class Codes: F16H 2200/2005 with one sets of orbital gears
• CPC Class Codes: F16H 3/006 power being selectively transmitted by either one of the parallel flow paths
• CPC Class Codes: F16H 3/085 with more than one output shaft
• CPC Class Codes: F16H 3/089 all of the meshing gears being supported by a pair of parallel shafts, one being the input shaft and the other the output shaft, there being no countershaft involved
• CPC Class Codes: F16H 3/725 with means to change ratio in the mechanical gearing
• CPC Class Codes: F16H 37/065 with a plurality of driving or driven shafts F16H37/08 takes precedence
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y10S 903/91 Orbital, e.g. planetary gears
• CPC Class Codes: Y10S 903/918 Continuously variable
• CPC Class Codes: Y10S 903/919 Stepped shift

Abstract

A power transmitting apparatus of a hybrid electric vehicle includes an input device including four input shafts disposed with several input gears, torque converting device including a planetary gear set having rotation elements connected with the input shafts, and a shifting output device for shifting torques received from the input shafts and outputting the shifted torque.

Claims

1. A power transmitting apparatus for a vehicle including power sources of an engine and a motor/generator, including:

an input device including a first input shaft selectively connectable with an engine and the motor/generator, a second input shaft selectively connectable with the motor/generator, a third input shaft fixedly disposed with at least one input gear, and a fourth input shaft selectively connectable with the first input shaft and fixedly disposed with one input gear;

a torque converting device including a planetary gear set having a first rotation element connected with the second input shaft, a second rotation element connected with the third input shaft, and a third rotation element connected with the first input shaft; and

a shifting output device for shifting torques received from the third and fourth input shafts and outputting a shifted torque,

wherein the shifting output device includes;

a first shifting output device including a first output shaft disposed in parallel with the first input shaft, two shifting gears rotatably disposed on the first output shaft, engaged with two input gears on the third input shaft, and selectively synchronized with the first output shaft by a first synchronizer, and a first output gear fixedly disposed at an upstream portion of the first output shaft; and

a second shifting output device including a second output shaft disposed in parallel with the first input shaft, one shifting gear fixedly disposed on the second output shaft and engaged with the one input shaft on the fourth input shaft, a reverse speed shifting gear rotatably disposed on the second output shaft and selectively synchronized with the second output shaft by a second synchronizer, a reverse speed idle shaft disposed in parallel with the second output shaft, a reverse speed idle gear rotatably disposed on the reverse speed idle shaft and engaged with the reverse speed shifting gear and the one input gear on the third input shaft, and a second output gear fixedly disposed at an upstream portion of the second output shaft.

2. The power transmitting apparatus of claim 1, wherein

the second and third input shafts of the input device are formed as hollows shaft;

the first, second, and third input shafts are coaxially disposed in an order of the first, second, and third input shafts in a radial direction thereof; and

the fourth input shaft is formed as a hollow shaft, disposed rearward to the second and third input shafts and coaxially disposed with the first input shaft.

3. The power transmitting apparatus of claim 1, wherein the torque converting device is disposed on the first input shaft at a location between the second and third input shafts and the fourth input shaft.

4. The power transmitting apparatus of claim 1, wherein the torque converting device is a single pinion planetary gear set having a sun gear as the first rotation element, a planet carrier as the second rotation element, and a ring gear as the third rotation element.

5. The power transmitting apparatus of claim 1, wherein

the at least one input gear fixedly disposed on the third input shaft includes a first input gear acting as an input gear for a first forward speed and a second input gear acting as an input gear for a third forward speed;

and

the one input gear fixedly disposed on the first input shaft is a third input gear acting as an input gear for a second forward speed.

6. A power transmitting apparatus for a vehicle including power sources of an engine and a motor/generator, including:

an input device including a first input shaft selectively connectable with an engine and the motor/generator, a second input shaft selectively connectable with the motor/generator, a third input shaft fixedly disposed with at least one input gear, and a fourth input shaft selectively connectable with the first input shaft and fixedly disposed with one input gear;

a torque converting device including a planetary gear set having a first rotation element connected with the second input shaft, a second rotation element connected with the third input shaft, and a third rotation element connected with the first input shaft; and

a shifting output device for shifting torques received from the third and fourth input shafts and outputting a shifted torque,

wherein the at least one input gear fixedly disposed on the third input shaft includes a first input gear acting as an input gear for a first forward speed and a second input gear acting as an input gear for a third forward speed,

wherein the one input gear fixedly disposed on the first input shaft is a third input gear acting as an input gear for a second forward speed, and

wherein the shifting output device includes a first shifting output device including;

a first output shaft disposed in parallel with the first input shaft;

a second forward speed shifting gear fixedly disposed with the first output shaft and engaged with the third input gear;

first forward and third speed shifting gears engaged with the first and second input gears, and selectively synchronized with the first output shaft by a first synchronizer; and

a first output gear fixedly disposed at an upstream portion of the first output shaft.

7. The power transmitting apparatus of claim 6, wherein the shifting output device further includes a second shifting output device including:

a second output shaft disposed in parallel with the first input shaft;

a reverse speed shifting gear rotatably disposed on the second output shaft and selectively synchronized with the second output shaft by a second synchronizer;

a reverse speed idle shaft disposed in parallel with the second output shaft;

a reverse speed idle gear rotatably disposed on the reverse speed idle shaft and engaged with the first input gear and the reverse speed shifting gear; and

a second output gear fixedly disposed at an upstream portion of the second output shaft.

8. A power transmitting apparatus for a vehicle including power sources of an engine and a motor/generator, including:

an input device including a first input shaft selectively connectable with an engine and the motor/generator, a second input shaft selectively connectable with the motor/generator, a third input shaft fixedly disposed with at least one input gear, and a fourth input shaft selectively connectable with the first input shaft and fixedly disposed with one input gear;

a torque converting device including a planetary gear set having a first rotation element connected with the second input shaft, a second rotation element connected with the third input shaft, and a third rotation element connected with the first input shaft; and

a shifting output device for shifting torques received from the third and fourth input shafts and outputting a shifted torque,

wherein the at least one input gear fixedly disposed on the third input shaft includes a first input near acting as an input gear for a first forward speed and a second input gear acting as an input gear for a third forward speed,

wherein the one input gear fixedly disposed on the first input shaft is a third input gear acting as an input gear for a second forward speed, and

wherein the shifting output device includes;

a first shifting output device including a first output shaft disposed in parallel with the first input shaft, first forward and third speed shifting gears rotatably disposed on the first output shaft, engaged with the first and second input gears, and selectively synchronized with the first output shaft by a first synchronizer, and a first output gear fixedly disposed at an upstream portion of the first output shaft; and

a second shifting output device including a second output shaft disposed in parallel with the first input shaft, a second forward speed shifting gear fixedly disposed on the second output shaft and engaged with the third input gear, a reverse speed shifting gear rotatably disposed on the second output shaft and selectively synchronized with the second output shaft by a second synchronizer, a reverse speed idle shaft disposed in parallel with the second output shaft, a reverse speed idle gear rotatably disposed on the reverse speed idle shaft and engaged with the first input gear and the reverse speed shifting gear, and a second output gear fixedly disposed at an upstream portion of the second output shaft.