Dual-motor power dividing hybrid power system with dual-power output function

Abstract

The utility model relates to a dual-motor power dividing hybrid power system with a dual-power output function. The power generation motor planet carrier is in hard connection with an engine input shaft, the power generation motor sun gear and the power generation motor inner gear ring are in meshed connection with gears on the two sides of the power generation motor planet carrier respectively, the gear ring is in hard connection with the power generation motor inner gear ring, and the driving motor planet carrier is in hard connection with the gear ring. The driving motor inner gear ring and the driving motor sun gear are in meshed connection with gears on the two sides of the driving motor planet carrier respectively, a first power output shaft is further arranged on the gear ring in a hard connection mode, and a second power output shaft coaxial with the engine input shaft is further arranged on the power generation motor planet carrier in a hard connection mode. Wherein the driving motor inner gear ring is fixedly connected with the whole vehicle gearbox shell, the power generation motor sun gear is in hard connection with the power generation motor, and the driving motor sun gear is in hard connection with the driving motor. According to the utility model, the planetary gear set and the power output shaft are reasonably arranged, so that the working mode of dual-power output is increased.

Description

Technical Field

[0001] The utility model relates to a hybrid transmission system for a vehicle, and in particular discloses a dual-motor power split hybrid system with a dual power output function. Background Art

[0002] Chinese patent CN202422388805.X, name: A dual-motor power split hybrid transmission, whose main structure includes: an engine input shaft, a GM motor, a TM motor, two planetary gear sets, an output shaft, and a number of bearings for connection and bolt fasteners for fixing various components. The two planetary gear sets are respectively a GM motor planetary gear set and a TM motor planetary gear set, each set includes a sun gear, a planetary gear, a planetary carrier and a ring gear, and the GM motor, the TM motor, the two planetary gear sets and the engine are arranged on the same axis. The power split system is formed by the planetary gear set, allowing the engine and two motors (one for power generation and the other for driving) to rotate at different speeds, and the power output of the engine is reasonably distributed between the motor and the direct drive to provide the torque and speed required by the wheels, so as to realize the reasonable power distribution between the motors of new energy vehicles under different working conditions, achieve optimal fuel efficiency and driving performance, reduce energy consumption and reduce emissions. However, this structure only has a single power output shaft. For some special-purpose vehicles, there is a need for dual power output models (such as tractors), which have high power output requirements and require the power system to have two independent power output sources. This structure is not applicable. Therefore, this patent still has shortcomings and its application scenarios are not wide enough. Utility Model Content

[0003] The purpose of the utility model is to solve the defects of the prior art and design a dual-motor power split hybrid system with dual power output function. By setting a second power output shaft and cooperating with a reasonably arranged planetary gear set for transmission, the vehicle has a dual power output working mode of the engine and the drive motor, thereby improving the power output of the vehicle.

[0004] The utility model is implemented as follows: a dual-motor power split hybrid system with dual power output function, characterized in that: it sequentially includes a generator motor planetary carrier hard-linked to the engine input shaft, a generator motor sun gear and a generator motor inner gear ring respectively meshed with gears on both sides of the generator motor planetary carrier, a gear ring hard-connected to the generator motor inner gear ring, a drive motor planetary carrier hard-connected to the gear ring, a drive motor inner gear ring and a drive motor sun gear respectively meshed with gears on both sides of the drive motor planetary carrier, a first power output shaft is hard-connected to the gear ring, and a second power output shaft coaxially arranged with the engine input shaft is hard-connected to the generator motor planetary carrier, wherein the drive motor inner gear ring is fixedly connected to the vehicle gear box housing, the generator motor sun gear is hard-connected to the generator motor, and the drive motor sun gear is hard-connected to the drive motor. The generator motor, the drive motor, the two planetary carriers and the engine are coaxially arranged. The first power output shaft and the second power output shaft are hard-connected to the vehicle gear box respectively.

[0005] The utility model has pure electric, in-situ range extension, hybrid, energy recovery and dual power output working modes.

[0006] The power output path of the power-split hybrid system in the pure electric working mode is as follows: the drive motor works and transmits power to the drive motor planetary carrier, the ring gear and the first power output shaft in sequence through the drive motor sun gear.

[0007] The power output path of the power-split hybrid system in the in-situ range-extending mode is as follows: the engine power drives the planetary carrier and the sun gear of the generator motor in sequence through the engine input shaft, thereby driving the generator motor to generate electricity.

[0008] The power output path of the power-split hybrid system in the hybrid mode is as follows: the engine power drives the generator motor planetary carrier through the engine input shaft, and the generator motor planetary carrier is simultaneously transmitted to the generator motor sun gear and the generator motor inner ring gear, and then the generator motor inner ring gear is sequentially transmitted to the ring gear and the first power output shaft, and at the same time, the drive motor works and transmits power to the drive motor planetary carrier, the ring gear and the first power output shaft in sequence through the drive motor sun gear.

[0009] The power output path of the power-split hybrid system in the energy recovery mode is as follows: when the vehicle needs to brake during operation, the kinetic energy of the vehicle is transmitted to the ring gear, the inner ring gear of the drive motor, the planetary carrier of the drive motor and the sun gear of the drive motor in sequence through the first power output shaft.

[0010] The dual power output mode of the power-split hybrid system: when operating in the in-situ range extension, hybrid, and energy recovery modes, the second power output shaft can also output power. The working power of the second power output shaft comes from the engine, and the vehicle control system independently controls the engine speed to adjust the working state of the second power output shaft.

[0011] The beneficial effects of the present invention are as follows: For vehicles that require dual power output, the present invention adopts a dual power shaft concentric output structure, and adds a second output shaft coaxial with the engine input shaft for power output, so that the dual-motor power split hybrid system has a dual power output function. When the power split hybrid system is in in-situ range extension, hybrid, and energy recovery working mode, the second power output shaft can also output power, and the engine speed can be independently controlled by the control system to adjust the speed of the second output shaft. Therefore, the second output shaft has the performance of independent output speed adjustment, which is convenient for the whole vehicle to match and connect the corresponding power, meet the power characteristics requirements of special vehicles during operation, and make the dual-motor power split hybrid system suitable for more application scenarios to meet market demand. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model.

[0013] In the figure: 1. engine input shaft; 2. generator motor; 3. generator motor sun gear; 4. generator motor planetary carrier; 5. generator motor inner ring gear; 6. ring gear; 7. drive motor inner ring gear; 8. drive motor planetary carrier; 9. drive motor sun gear; 10. drive motor; 11. first power output shaft; 12. second power output shaft. DETAILED DESCRIPTION

[0014] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0015] According to the attached Figure 1 The utility model is a dual-motor power split hybrid system with dual power output function, which sequentially comprises a generator motor planetary carrier 4 hard-linked to an engine input shaft 1, a generator motor sun gear 3 and a generator motor inner gear ring 5 respectively meshed with gears on both sides of the generator motor planetary carrier 4, a gear ring 6 hard-connected to the generator motor inner gear ring 5, a drive motor planetary carrier 8 hard-connected to the gear ring 6, a drive motor inner gear ring 7 and a drive motor sun gear 9 respectively meshed with gears on both sides of the drive motor planetary carrier 8, a first power output shaft 11 is hard-connected to the gear ring 6, a second power output shaft 12 coaxially arranged with the engine input shaft 1 is hard-connected to the generator motor planetary carrier 4, and the first power output shaft 11 and the second power output shaft 12 are hard-connected to the vehicle gear box respectively, wherein the drive motor inner gear ring 7 is fixedly connected to the vehicle gear box housing, the generator motor sun gear 3 is hard-connected to the generator motor 2 (GM motor), and the drive motor sun gear 9 is hard-connected to the drive motor 10 (TM motor), and the generator motor, the drive motor, the two planetary carriers and the engine are coaxially arranged.

[0016] The working modes of the utility model are divided into: pure electric, on-site range extension, hybrid, energy recovery and dual power output working modes.

[0017] Pure electric working mode: the drive motor 10 works and transmits power to the drive motor planetary carrier 8, the ring gear 6, and the first power output shaft 11 in sequence through the drive motor sun gear 9.

[0018] In-situ range extension mode: The engine power drives the generator motor planetary carrier 4 and the generator motor sun gear 3 in sequence through the engine input shaft 1, thereby driving the generator motor 2 to generate electricity.

[0019] Hybrid mode: the engine power drives the generator motor planetary carrier 4 through the engine input shaft 1, and the generator motor planetary carrier 4 is simultaneously transmitted to the generator motor sun gear 3 and the generator motor inner ring gear 5, and then the generator motor inner ring gear 5 is sequentially transmitted to the ring gear 6 and the first power output shaft 11; at the same time, the drive motor 10 works and transmits power to the drive motor planetary carrier 8, the ring gear 6 and the first power output shaft 11 in sequence through the drive motor sun gear 9; in this state, the generator motor 2 is in power generation, and the generated electric energy is consumed by the drive motor 10 to balance the power of the vehicle's high-voltage battery. When the power is high, the drive motor 10 can consume more power, and when the power is low, the drive motor 10 can consume less power.

[0020] Energy recovery mode: When the vehicle needs to brake during operation, the kinetic energy of the vehicle is transmitted to the ring gear 6, the inner ring gear 7 of the drive motor, the planetary carrier 8 of the drive motor, and the sun gear 9 of the drive motor in sequence through the first power output shaft 11. At this time, the drive motor converts the kinetic energy of the vehicle into electrical energy and stores it in the high-voltage battery pack of the vehicle. At this time, the engine and the generator motor 2 can determine whether to generate electricity according to the power of the high-voltage battery pack of the vehicle. When the power is high, no power will be generated, and when the power is low, power can be generated.

[0021] Dual power output mode: When the above-mentioned in-situ range extension, hybrid and energy recovery are working, the second power output shaft 12 can also output power. When the second power output shaft 12 needs to adjust the speed, the engine speed can be controlled independently by the vehicle control system. The output speed and torque of the second power output shaft 12 will not change due to changes in the output speed and torque of the first power output shaft 11.

[0022] The hybrid working principle of the utility model is as follows: part of the energy of the engine is directly output to the wheels through the planetary gears, and part of the energy is generated by the generator motor. The energy generated by the generator motor is output to the wheels through the drive motor, thereby realizing power transmission.

[0023] The utility model has two independent power output sources, and is particularly suitable for vehicles that require dual power output. The second power output shaft is arranged in conjunction with a reasonably arranged planetary gear set for transmission, and combined with intelligent control of the motor and the engine, the vehicle has a dual power output working mode of the engine and the drive motor, thereby improving the vehicle's power output.

Claims

1. A dual-motor power split hybrid system with dual power output function, characterized in that: It includes, in sequence, a generator motor planetary carrier hard-linked to the engine input shaft, a generator motor sun gear and a generator motor inner gear ring respectively meshing with gears on both sides of the generator motor planetary carrier, a gear ring hard-linked to the generator motor inner gear ring, a drive motor planetary carrier hard-linked to the gear ring, a drive motor inner gear ring and a drive motor sun gear respectively meshing with gears on both sides of the drive motor planetary carrier, a first power output shaft is also hard-linked to the gear ring, a second power output shaft coaxially arranged with the engine input shaft is hard-linked to the generator motor planetary carrier, wherein the drive motor inner gear ring is fixedly connected to the vehicle gear box housing, the generator motor sun gear is hard-linked to the generator motor, and the drive motor sun gear is hard-linked to the drive motor.

2. The dual-motor power split hybrid system with dual power output function according to claim 1, characterized in that: The generator motor, the drive motor, the two planet carriers and the engine are arranged on a coaxial line.

3. The dual-motor power split hybrid system with dual power output function according to claim 1, characterized in that: The first power output shaft and the second power output shaft are respectively hard-connected to the gearbox of the vehicle.

4. A dual-motor power split hybrid system with dual power output function according to any one of claims 1 to 3, characterized in that The power output path of the power-split hybrid system in the pure electric working mode is as follows: the drive motor works and transmits power to the drive motor planetary carrier, the ring gear and the first power output shaft in sequence through the drive motor sun gear.

5. A dual-motor power split hybrid system with dual power output function according to any one of claims 1 to 3, characterized in that The power output path of the power-split hybrid system in the in-situ range-extending mode is as follows: the engine power drives the planetary carrier and the sun gear of the generator motor in sequence through the engine input shaft, thereby driving the generator motor to generate electricity.

6. A dual-motor power split hybrid system with dual power output function according to any one of claims 1 to 3, characterized in that The power output path of the power-split hybrid system in the hybrid mode is as follows: the engine power drives the generator motor planetary carrier through the engine input shaft, and the generator motor planetary carrier is simultaneously transmitted to the generator motor sun gear and the generator motor inner ring gear, and then the generator motor inner ring gear is sequentially transmitted to the ring gear and the first power output shaft, and at the same time, the drive motor works and transmits power to the drive motor planetary carrier, the ring gear and the first power output shaft in sequence through the drive motor sun gear.

7. A dual-motor power split hybrid system with dual power output function according to any one of claims 1 to 3, characterized in that The power output path of the power-split hybrid system in the energy recovery mode is as follows: when the vehicle needs to brake during operation, the kinetic energy of the vehicle is transmitted to the ring gear, the inner ring gear of the drive motor, the planetary carrier of the drive motor and the sun gear of the drive motor in sequence through the first power output shaft.

8. A dual-motor power split hybrid system with dual power output function according to claim 1 or 3, characterized in that: The working power of the second power output shaft comes from the engine, and the vehicle control system independently controls the engine speed to adjust the working state of the second power output shaft.

Images