Powertrain for hybrid vehicle

Patent metadata

Field	Value
Publication number	US-10710445-B2
Application number	US-201816189254-A
Country	US
Kind code	B2
Filing date	Nov 13, 2018
Priority date	Feb 28, 2018
Publication date	Jul 14, 2020
Grant date	Jul 14, 2020

Abstract

A powertrain for a hybrid vehicle may include a planetary gear set; a first motor-generator connected to one rotation element of the planetary gear set and an engine connected to the first motor-generator; a second motor-generator connected to another rotation element of the planetary gear set; a second clutch connected to the other rotation element of the planetary gear set and a second drive gear connected to the second clutch; a first clutch connected to the rotation element to which the first motor-generator is connected and a first drive gear connected to the first clutch; and an output shaft having a first driven gear and a second driven gear engaged in the first drive gear and the second drive gear, respectively.

First claim

What is claimed is:

1. A powertrain apparatus for a vehicle, comprising:
a planetary gear set including a first rotation element, a second rotation element, and a third rotation element, wherein the first rotation element is engaged with the second rotation element and the second rotation element is engaged with the third rotation element;
a first motor-generator directly connected to the first rotation element of the planetary gear set, wherein an engine of the vehicle is connected to the first rotation element through the first motor-generator;
a second motor-generator directly connected to the third rotation element of the planetary gear-set;
a first clutch directly connected to the first rotation element and a first drive gear;
a second clutch directly connected to the second rotation element and a second drive gear; and
an output shaft having a first driven gear and a second driven gear engaged with the first drive gear and the second drive gear, respectively.

2. The powertrain apparatus for the vehicle according to claim 1 , wherein the first rotation element is further provided with a brake that is configured to selectively constrain a rotation of the first rotation element.

3. The powertrain apparatus for the vehicle according to claim 2 , wherein the brake is mounted at a transmission housing.

4. The powertrain apparatus for the vehicle according to claim 2 , wherein the first rotation element is a ring gear, the second rotation element is a carrier, and the third rotation element is a sun gear.

5. The powertrain apparatus for the hybrid vehicle according to claim 1 , wherein a gear ratio between the first drive gear and the first driven gear is formed to be different from a gear ratio between the second drive gear and the second driven gear.

6. The powertrain apparatus for the vehicle according to claim 1 , wherein a third clutch is further mounted between the engine and the first motor-generator to selectively connect the engine and the first motor-generator.

7. The powertrain apparatus for the vehicle according to claim 1 , wherein the output shaft is connected to a drive wheel.

8. The powertrain apparatus for the vehicle according to claim 1 , wherein the first rotation element of the planetary gear set is directly connected to the first motor-generator.

9. The powertrain apparatus for the vehicle according to claim 1 , wherein the second motor-generator is directly connected to the third rotation element of the planetary gear set.

10. The powertrain apparatus for the vehicle according to claim 1 , wherein the first clutch is directly connected to the first rotation element and the first drive gear.

11. The powertrain apparatus for the vehicle according to claim 1 , wherein the second clutch is directly connected to the second rotation element and the second drive gear.

12. The powertrain apparatus for the vehicle according to claim 1 , wherein the engine, the first motor-generator and the first rotation element are connected to each other in series.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Kong Jin Kook
• Cheong Yeon Min

Classifications

• Y02T10/62

  Hybrid vehicles · CPC title

• F16H3/72

  with a secondary drive, e.g. regulating motor, in order to vary speed continuously · CPC title

• B60Y2200/92

  Hybrid vehicles · CPC title

• B60K6/485 Primary

  Motor-assist type · CPC title

• B60K6/38

  characterised by the driveline clutches (shift clutches within the gearing or transmission B60K6/36) · CPC title