# US 11,299,027 B2 · Power system for hybrid vehicles

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- Number: US 11,299,027 B2
- Document ID: US11299027B2
- Status: Granted
- Kind: B2
- Application number: 17/259,103
- Filed: 2019-03-14
- Published: 2021-09-23
- Granted: 2022-04-12
- Earliest claimed: 2018-07-09
- Assignees: Ningbo Umd Automatic Transmission Co., Ltd
- Applicants: Ningbo Umd Automatic Transmission Co., Ltd.
- Inventors: Zhiling Qiu; Tejinder Singh; Jun Fu; Choonghyeo Kim; Daguo Luo; Xiaozhe Lin; Ruiping Wang
- Web page: https://patentgrep.com/patent/US11299027B2

## CPC

- B60K 6/365: with the gears having orbital motion
- B60K 6/442: Series-parallel switching type
- B60K 6/38: characterised by the driveline clutches (shift clutches within the gearing or transmission B60K6/36)
- B60K 6/387: Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means
- B60K 6/547: the transmission being a stepped gearing
- F16H 3/663: {with conveying rotary motion between axially spaced orbital gears, e.g. a stepped orbital gear or Ravigneaux}
- B60K 2006/381: {characterized by driveline brakes}
- B60K 2006/4825: {Electric machine connected or connectable to gearbox input shaft}
- F16H 2200/0021: specially adapted for electric vehicles
- F16H 2200/0034: the gear ratios comprising two forward speeds
- F16H 2200/2005: with one sets of orbital gears
- F16H 2200/201: with three sets of orbital gears
- F16H 2200/2023: using a Ravigneaux set with 4 connections
- F16H 2200/2035: with two engaging means
- Y02T 10/62: Hybrid vehicles
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- F16H: GEARING
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

The present invention provides a power system for a hybrid vehicle, relating to the field of hybrid vehicles. The power system for a hybrid vehicle adopts a first planetary gear mechanism with two sun gears, the first sun gear rotates with an input shaft, the second sun gear and the input shaft are independent of each other, and the second sun gear achieves different motion states through a second brake or/and a second clutch, and cooperates with a first brake to provide different transmission ratios of four to six gears when an engine and motors are in driving, so that the power system is simple in structure and low in cost, and the fuel economy and acceleration dynamic performance of the power system are improved.

## Claims

### Claim 1

A power system for a hybrid vehicle, characterized in that the power system includes an engine, a first motor, a second motor, a first planetary gear mechanism, an input shaft, a first clutch, and a first brake;
the engine is connected to the first motor, and the first clutch is arranged between the first motor and the input shaft to cut off or connect power transmission between the first motor and the input shaft through the first clutch; the second motor is arranged on the input shaft to drive the input shaft to rotate;
the first planetary gear mechanism includes a first sun gear, a first set of planetary gears, a second set of planetary gears, a first gear ring, and a first planetary carrier shared by the first set of planetary gears and the second set of planetary gears; external gears of the second set of planetary gears are respectively meshed with external gears of the first set of planetary gears and an internal gear of the first gear ring, the first sun gear is arranged on the input shaft to enable the first sun gear to rotate with the input shaft, and the first gear ring is configured to transmit power output by the power system; the first brake is arranged between the first planetary carrier and a housing of the power system; the first planetary gear mechanism further includes a second sun gear coaxial with the first sun gear, the second sun gear and the input shaft are independent of each other, and an external gear of the second sun gear is meshed with the external gears of the second set of planetary gears; and
the power system further includes a second clutch; the second clutch is configured to enable the second sun gear to rotate with the input shaft when the second clutch is in an engaged state,
wherein the second motor is connected to the input shaft through a second planetary gear mechanism, and the second planetary gear mechanism includes a third sun gear, at least one set of planetary gears, a second gear ring, and a second planetary carrier.

### Claim 2 (depends on 1)

The power system for a hybrid vehicle according to claim 1, wherein the second clutch is arranged between the input shaft and the second sun gear.

### Claim 3 (depends on 1)

The power system for a hybrid vehicle according to claim 1, wherein the second clutch is arranged between a rotor of the second motor and the second sun gear.

### Claim 4 (depends on 1)

The power system for a hybrid vehicle according to claim 1, wherein the third sun gear is fixed on a rotor of the second motor and rotates together with the rotor, the second planetary carrier is fixed to the housing, and the second motor transmits power to the input shaft through the second gear ring.

### Claim 5 (depends on 1)

The power system for a hybrid vehicle according to claim 1, wherein the third sun gear is fixed to the housing, the second gear ring is fixed on a rotor of the second motor and rotates together with the rotor, and the second motor transmits power to the input shaft through the second planetary carrier.

### Claim 6

A power system for a hybrid vehicle, characterized in that the power system includes an engine, a first motor, a second motor, a first planetary gear mechanism, a second planetary gear mechanism, an input shaft, a first clutch, a second clutch, a first brake, and a second brake;
the engine is connected to the first motor, and the first clutch is arranged between the first motor and the input shaft to cut off or connect power transmission between the engine and/or the first motor and the input shaft through the first clutch; the second motor is arranged on the input shaft to drive the input shaft to rotate;
the first planetary gear mechanism includes a first sun gear, a first set of planetary gears, a first gear ring, and a first planetary carrier; the first sun gear is arranged on the input shaft to enable the first sun gear to rotate with the input shaft; the second planetary gear mechanism includes a second sun gear, a second set of planetary gears, a second gear ring, and a second planetary carrier; the second sun gear and the input shaft are independent of each other; the second gear ring is fixedly connected to the first planetary carrier, the first gear ring is fixedly connected to the second planetary carrier, and the second gear ring is configured to transmit power output by the power system; and
the first brake is arranged between the second planetary carrier and a housing of the power system; and the second brake is arranged between the second sun gear and the housing of the power system, and the second clutch is arranged between the second sun gear and the input shaft.