POWER TRANSMISSION APPARATUS FOR VEHICLE

• US 20150184731A1
• Filed: 11/12/2014
• Published: 07/02/2015
• Est. Priority Date: 12/31/2013
• Status: Active Grant

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group)
• Inventors: LEE, Suengho, Lee, Changwook, Park, Jongsool, Cho, Hyungwook
• Granted Patent: US 9,109,682 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B60K 2006/4816 Electric machine connected or connectable to gearbox internal shaft
• CPC Class Codes: B60K 2006/4841 the gear provides shifting between multiple ratios
• CPC Class Codes: B60K 6/365 with the gears having orbital motion
• CPC Class Codes: B60K 6/48 Parallel type
• CPC Class Codes: B60K 6/547 the transmission being a stepped gearing
• CPC Class Codes: F16H 2003/0822 characterised by the arrangement of at least one reverse gear
• CPC Class Codes: F16H 2003/0931 each countershaft having an output gear meshing with a single common gear on the output shaft
• CPC Class Codes: F16H 2200/0052 the gear ratios comprising six forward speeds
• CPC Class Codes: F16H 2200/0086 the gear ratios comprising two reverse speeds
• CPC Class Codes: F16H 2200/2005 with one sets of orbital gears
• CPC Class Codes: F16H 2200/2038 with three engaging means
• CPC Class Codes: F16H 3/006 power being selectively transmitted by either one of the parallel flow paths
• CPC Class Codes: F16H 37/046 with an additional planetary gear train, e.g. creep gear, overdrive
• CPC Class Codes: F16H 61/0403 Synchronisation before shifting
• CPC Class Codes: Y02T 10/62 Hybrid vehicles
• CPC Class Codes: Y10S 903/919 Stepped shift

Abstract

A power transmission apparatus may include: a torque converting device including a first rotation element directly connected to one power source and selectively fixed to a transmission housing, a second rotation element directly connected to another power source, and a third rotation element configured to output the torque of the another power source; an input device including a first input shaft directly connected to the third rotation element, selectively connected to the second rotation element, and provided with at least one input gear, and a second input shaft selectively connected to the second rotation element, and provided with at least one input gear; a first speed output unit configured to convert toque input from the first input shaft or the second input shaft; and a second speed output unit configured to convert torque input from the first input shaft or the second input shaft.

Claims

1. A power transmission apparatus for a vehicle comprising:

a torque converting device including;

a first rotation element directly connected to one power source and selectively fixed to a transmission housing;

a second rotation element directly connected to another power source; and

a third rotation element;

an input device including;

a first input shaft directly connected to the third rotation element, selectively connected to the second rotation element, and provided with at least one input gear fixedly disposed on an exterior circumference thereof; and

a second input shaft disposed without rotational interference with the first input shaft, selectively connected to the second rotation element, and provided with at least one input gear fixedly disposed on an exterior circumference thereof;

a first speed output unit configured to convert toque input from the first input shaft or the second input shaft and output a converted torque; and

a second speed output unit configured to convert torque input from the first input shaft or the second input shaft and output a converted torque.

2. The power transmission apparatus of claim 1, wherein the one power source is a motor/generator and the another power source is an engine.

3. The power transmission apparatus of claim 2, wherein the motor/generator comprises:

a stator fixed to the transmission housing; and

a rotor rotatably disposed in the stator, directly connected to the first rotation element, and selectively connected to the transmission housing.

4. The power transmission apparatus of claim 3, further comprising:

a first clutch disposed between the second rotation element and the first input shaft;

a second clutch disposed between the second rotation element and the second input shaft; and

a brake disposed between the rotor and the transmission housing.

5. The power transmission apparatus of claim 1,

wherein a first input gear is fixedly disposed on the second input shaft, and

wherein second, third, and fourth input gears are fixedly disposed on the first input shaft.

6. The power transmission apparatus of claim 5, wherein the torque converting device is a double pinion planetary gear set, wherein the first rotation element is a sun gear, the second rotation element is a planet carrier, and the third rotation element is a ring gear.

7. The power transmission apparatus of claim 5, wherein the first speed output unit comprises:

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

a first output gear fixedly disposed on the first output shaft and outputting torque of the first output shaft;

first, second, and third speed gears rotatably disposed on the first output shaft;

a first synchronizer selectively connecting the first speed gear or the third speed gear to the first output shaft; and

a second synchronizer selectively connecting the second speed gear to the first output shaft.

8. The power transmission apparatus of claim 7, wherein the first speed gear is engaged with the second input gear, the second speed gear is engaged with the first input gear, and the third speed gear is engaged with the fourth input gear.

9. The power transmission apparatus of claim 7, wherein the second speed output unit comprises:

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

a second output gear fixedly disposed on the second output shaft and outputting torque of the second output shaft;

a fourth speed gear and a reverse speed gear rotatably disposed on the second output shaft; and

a third synchronizer selectively connecting the fourth speed gear or the reverse speed gear to the second output shaft.

10. The power transmission apparatus of claim 9, further comprising a reverse speed unit configured to achieve a reverse shift-speed using the torque of the second output shaft,

wherein the fourth speed gear is engaged with the first input gear and the reverse speed gear is operably connected to the third input gear through the reverse speed unit.

11. The power transmission apparatus of claim 10, wherein the reverse speed unit comprises:

an idle shaft disposed in parallel with the second output shaft;

a first idle gear fixedly disposed on the idle shaft and engaged with the third input gear; and

a second idle gear fixedly disposed on the idle shaft and engaged with the reverse speed gear.

12. The power transmission apparatus of claim 1,

wherein first, second, and third input gears are fixedly disposed on the first input shaft, and

wherein a fourth input gear is fixedly disposed on the second input shaft.

13. The power transmission apparatus of claim 12, wherein the torque converting device is a double pinion planetary gear set, wherein the first rotation element is a planet carrier, the second rotation element is a sun gear, and the third rotation element is a ring gear.

14. The power transmission apparatus of claim 12, wherein the first speed output unit comprises:

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

a first output gear fixedly disposed on the first output shaft and outputting torque of the first output shaft;

first, second, and third speed gears rotatably disposed on the first output shaft;

a first synchronizer selectively connecting the first speed gear or the third speed gear to the first output shaft; and

a second synchronizer selectively connecting the second speed gear to the first output shaft.

15. The power transmission apparatus of claim 14, wherein the first speed gear is engaged with the third input gear, the second speed gear is engaged with the fourth input gear, and the third speed gear is engaged with the first input gear.

16. The power transmission apparatus of claim 14, wherein the second speed output unit comprises:

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

a second output gear fixedly disposed on the second output shaft and outputting torque of the second output shaft;

a fourth speed gear and a reverse speed gear rotatably disposed on the second output shaft; and

a third synchronizer selectively connecting the fourth speed gear or the reverse speed gear to the second output shaft.

17. The power transmission apparatus of claim 16, further comprising a reverse speed unit configured to achieve a reverse shift-speed using the torque of the second output shaft,

wherein the fourth speed gear is engaged with the fourth input gear and the reverse speed gear is operably connected to the second input gear through the reverse speed unit.

18. The power transmission apparatus of claim 17, wherein the reverse speed unit comprises:

an idle shaft disposed in parallel with the second output shaft;

a first idle gear fixedly disposed on the idle shaft and engaged with the second input gear; and

a second idle gear fixedly disposed on the idle shaft and engaged with the reverse speed gear.

19. The power transmission apparatus of claim 12, wherein the torque converting device is a single pinion planetary gear set, wherein the first rotation element is a sun gear, the second rotation element is a ring gear, and the third rotation element is a planet carrier.

20. The power transmission apparatus of claim 12, wherein the torque converting device is a single pinion planetary gear set, wherein the first rotation element is a ring gear, the second rotation element is a sun gear, and the third rotation element is a planet carrier.