CN219749506U - Dual-motor power split hybrid system for front-drive vehicle - Google Patents
Dual-motor power split hybrid system for front-drive vehicle Download PDFInfo
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- CN219749506U CN219749506U CN202320347963.3U CN202320347963U CN219749506U CN 219749506 U CN219749506 U CN 219749506U CN 202320347963 U CN202320347963 U CN 202320347963U CN 219749506 U CN219749506 U CN 219749506U
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- 238000010248 power generation Methods 0.000 claims abstract description 27
- 230000009977 dual effect Effects 0.000 claims description 9
- 238000001816 cooling Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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Abstract
The utility model relates to a double-motor power split hybrid system for a front-drive vehicle. The planetary gear comprises a driving motor, a power generation motor, a gear box input shaft, a driving shaft, a middle shaft, a wheel output shaft and 1 planetary row; the planet carrier of the planet row is connected with an engine through the input shaft of the gear box, the gear ring of the planet row is connected with the rotor of the power generation motor, and the sun gear of the planet row is connected with one end of the driving shaft; the other end of the driving shaft is connected with a rotor of the driving motor, and a first-stage driving gear is arranged on the driving shaft; the intermediate shaft is provided with a first-stage driven gear and a second-stage driving gear, and the first-stage driving gear is meshed with the first-stage driven gear; and the wheel output shaft is provided with a main reduction driven gear, and the second-stage driving gear is meshed with the main reduction driven gear.
Description
Technical Field
The utility model relates to a precursor driven automobile power system, in particular to a double-motor power splitting and mixing system for a precursor automobile.
Background
Currently, in a dual motor hybrid system of a front drive automotive transmission, two simple planetary arrangements are employed as the primary structure, with the presence of clutches and hydraulic units. The clutch mainly comprises a friction element, a hydraulic unit and a cooling unit. The friction element comprises a main driven friction plate and a driven friction plate, the transmission torque of the clutch is realized by the friction force among the friction elements, the hydraulic unit comprises a hydraulic cylinder, a piston return device, a hydraulic pump, an electromagnetic valve, a pressure sensor and the like, the electromagnetic valve is actively controlled, pressure oil generated by the hydraulic pump enters the hydraulic cylinder through a pipeline to push the piston to press the friction unit, the clutch is combined, and the pressure sensor is used for monitoring the actual pressure of the clutch, so that the working state of the clutch is judged; the cooling unit comprises a pump, a heat exchanger and a pipeline, cooling oil generated by the pump enters between the friction elements after being cooled by the heat exchanger, and the friction elements have relative rotation speed difference when working and need to be forcedly cooled, so that the friction elements are prevented from being ablated due to relative friction.
For example, patent application No. 202020310824.X discloses a dual-motor coaxial hybrid transmission, in which the engine and the dual motor are spatially coaxially arranged, wherein the dual motor is a driving motor and a generator, and is connected to the driving motor by a simple planetary arrangement, and the simple planetary arrangement includes a sun gear, a planet carrier and a ring gear, and in the structure of the first embodiment, the structure includes an engine ICE, a generator EM1, a driving motor EM2, a clutch 100, a planetary arrangement PT1, a planetary arrangement PT2 and a differential 200, and the clutch 100 is located between the two planetary arrangements, which is characterized by compact structure of the transmission. However, since the clutch system is complicated in both mechanical and control aspects, failure risk is liable to occur, and the cost is high. In addition, the double planetary row structure is relatively complex, the number of parts is large, the cost is high, and the assembly process is difficult.
Disclosure of Invention
The utility model aims to solve the problems in the prior art and provides a double-motor power split hybrid system for a front drive vehicle, which replaces a clutch and two simple planetary rows with a single planetary row, so that the structure is simplified, the cost is reduced, and the running reliability can be improved.
The utility model is realized in the following way: a double-motor power splitting and mixing system for a front-drive vehicle comprises a driving motor, a generating motor, a gear box input shaft, a driving shaft, an intermediate shaft, a wheel output shaft and 1 planetary row;
the planet carrier of the planet row is connected with an engine through the input shaft of the gear box, the gear ring of the planet row is connected with the rotor of the power generation motor, and the sun gear of the planet row is connected with one end of the driving shaft; the other end of the driving shaft is connected with a rotor of the driving motor, and a first-stage driving gear is arranged on the driving shaft;
the intermediate shaft is provided with a first-stage driven gear and a second-stage driving gear, and the first-stage driving gear is meshed with the first-stage driven gear;
and the wheel output shaft is provided with a main reduction driven gear, and the second-stage driving gear is meshed with the main reduction driven gear.
The driving shaft and the first-stage driving gear are connected or fixedly connected into a whole through a key.
The intermediate shaft is connected with the first-stage driven gear and the second-stage driving gear through keys or is fixedly connected into a whole.
The wheel output shaft and the driving and driven gears are connected or fixedly connected into a whole through keys.
And the gear ring of the planet row is connected with the rotor of the power generation motor and is integrated into the rotor of the power generation motor.
The driving motor, the power generation motor and the engine are coaxially arranged.
The power generation motor forms linkage adjustment on the rotating speed of the engine through the planet row by adjusting the rotating speed.
The rotating speed of the power generation motor corresponds to the rotating speed of the gear ring; the rotating speed of the driving motor corresponds to the rotating speed of the sun gear; the rotational speed of the carrier corresponds to the rotational speed of the engine.
The planetary gear is provided with three moving parts of a sun gear, a gear ring and a planet carrier, the rotation speeds of the three moving parts have corresponding relations, the working state of the third part can be realized by adjusting the rotation speeds of any two parts, and by utilizing the characteristic, when the driving motor is under any rotation speed working condition, the rotation speed limitation of the engine can be realized by adjusting the rotation speed working condition of the power generation motor, and the pure electric and hybrid working modes can be realized.
The beneficial effects of the utility model are as follows: the clutch and two simple planetary rows in the prior art are replaced by one planetary row, the sun gear of the planetary row is connected with a driving motor through a driving shaft by utilizing the advantages that 1 planetary row has three degrees of freedom, the gear ring of the planetary row is connected with a power generation motor, and the planetary frame is connected with an engine through a gear box input shaft; when the engine is not expected to run, the engine can work at 0rpm by actively controlling the rotation speeds of the driving motor and the generating motor; when the engine is running, the rotation speed of the engine can be controlled by actively adjusting the rotation speeds of the driving motor and the generating motor.
When the gear ring of the planetary row is connected with the power generation motor, the planetary row system is convenient to integrate into the rotor of the power generation motor, the size and the weight of the power assembly are reduced, and meanwhile, the cost is effectively reduced.
Compared with the prior art, only 1 planetary row is arranged, so that redundant friction elements, cooling units and the like are omitted, and parts are reduced, so that the structure is relatively simple, and the purposes of low cost and higher reliability are achieved; the control system of the 1 planetary gear set is relatively simple, hydraulic units such as an oil pump, an electromagnetic valve and a pressure sensor are not needed, and the effect of controlling the rotation speed of the engine can be achieved by only adjusting the rotation speeds of the driving motor and the generating motor. The utility model has the advantages of relatively simple mechanical structure, easier control, and improved cost, assembly process and reliability.
Drawings
Fig. 1 is a schematic diagram of the structure of the present utility model.
Wherein: 1. a driving motor; 2. a power generation motor; 3. a gearbox input shaft; 4. a driving shaft; 5. a planet row; 6. an intermediate shaft; 7. a wheel output shaft; 8. an engine; 9. a planet carrier; 10. a gear ring; 11. a first stage drive gear; 12. a first stage passive gear; 13. a second stage drive gear; 14. a drive-reduction driven gear; 15. and a sun gear.
Description of the embodiments
According to fig. 1, the dual-motor power split hybrid system for a front-drive vehicle according to the present utility model comprises a drive motor 1, a generator motor 2, a gearbox input shaft 3, a drive shaft 4, 1 planetary row 5, an intermediate shaft 6 and a wheel output shaft 7.
The planet carrier 9 of the planet row 5 is connected with the gear box input shaft 3 through a hard connection, the gear box input shaft 3 is connected with the engine 8, the gear ring 10 of the planet row 5 is connected with the rotor of the power generation motor 2, and the sun gear 15 of the planet row 5 is connected with one end of the driving shaft 4 through a hard connection; the other end of the driving shaft 4 is connected with a rotor of the driving motor 1 through hard connection, a first-stage driving gear 11 is arranged on the driving shaft 4, and the first-stage driving gear 11 and the driving shaft 4 are connected through keys or are fixedly connected into a whole; the first stage driving gear 11 is intermeshed with the first stage driven gear 12.
The intermediate shaft 6 is provided with a first-stage driven gear 12 and a second-stage driving gear 13, and the intermediate shaft 6 is respectively connected with the first-stage driven gear 12 and the second-stage driving gear 13 through keys or fixedly connected into a whole. The second stage driving gear 13 is intermeshed with the driving and driven gears 14.
The wheel output shaft 7 is provided with a main reduction driven gear 14, and the wheel output shaft 7 and the main reduction driven gear 14 are connected through keys or fixedly connected into a whole. The gear ring 10 of the planetary row 5 is connected with the rotor of the power generation motor 2, and the gear ring 10 of the planetary row 5 can be integrated into the rotor of the power generation motor 2; the driving motor 1, the generating motor 2 and the engine 8 are coaxially arranged. The power generation motor 2 adjusts the rotation speed of the engine 8 through the planetary gear set 5 by adjusting the rotation speed.
The rotation speed of the generator motor 2 corresponds to the rotation speed of the ring gear 10; the rotational speed of the drive motor 1 corresponds to the rotational speed of the sun gear 15; the rotational speed of the carrier 9 corresponds to the rotational speed of the engine 8.
The planetary gear 5 is provided with three moving parts of a sun gear 15, a gear ring 10 and a planet carrier 9, the rotation speeds of the three moving parts are in corresponding relation, the working state of the third part can be adjusted by adjusting the rotation speeds of any two parts, and by utilizing the characteristic, when the driving motor 1 is under any rotation speed working condition, the rotation speed of the engine 8 can be limited by adjusting the rotation speed working condition of the generating motor 2, so that a pure electric or hybrid working mode is realized.
The working principle of the planetary gear 5 is as follows: the sun gear 15 has the highest rotating speed, the ring gear 10 and the planet carrier 9, and the connecting mode of the utility model is that the sun gear 15 is connected with the driving shaft 4, the ring gear 10 is connected with the power generation motor 2, and the planet carrier 9 is connected with the gearbox input shaft 3. For example, when the engine is not operating, the rotational speed is 0rpm. If, during operation of the vehicle, the vehicle speed is 50kmh and the rotational speed of the sun gear is 2000rpm. The rotation speed of the generator motor 2 is controlled to 5685rpm, so that the rotation speed of the engine 8 is 0rpm, and the switching of pure electric and hybrid operation modes is realized.
In a double-motor hybrid system of a front-drive automobile gearbox, a driving motor is connected with a sun gear of a planetary row, so that the structure volume is large; the utility model adopts the mode that the gear ring 10 is connected with the rotor of the power generation motor 2, so that the integration is easier to realize in structure, and the structure is more compact.
When the utility model is used, the power of the driving motor 1 is transmitted to the first-stage driving gear 11 through the driving shaft 4, the first-stage driving gear 11 is transmitted to the first-stage driven gear 12 through gear engagement, the intermediate shaft 6 is further transmitted to the second-stage driving gear 13, the second-stage driving gear 13 is transmitted to the main driven gear 14 through gear engagement, and finally the power is divided into two wheels through the wheel output shaft 7, so that the automobile is pushed to move.
The power of the automobile engine is transmitted to the driving shaft 4 through the planet row 5 and then to the first-stage driving gear 11, the first-stage driving gear 11 is transmitted to the first-stage driven gear 12 through gear engagement, the intermediate shaft 6 is further transmitted to the second-stage driving gear 13, the second-stage driving gear 13 is transmitted to the main-minus driven gear 14 through gear engagement, and finally the power is divided into two wheels through the wheel output shaft 7.
According to the utility model, a planetary row 5 is used for replacing a clutch and two simple planetary rows in the prior art, the advantages of three degrees of freedom of the 1 planetary row are utilized, a sun gear 15 of the planetary row 5 is connected with a driving motor 1 through a driving shaft 4, a gear ring 10 of the planetary row 5 is connected with a power generation motor 2, and a planet carrier 9 is connected with an engine 8 through a gear box input shaft 3; when the engine 8 is not expected to run, the engine 8 can be operated at 0rpm by actively controlling the rotation speeds of the driving motor 1 and the generating motor 2; when the engine 8 is running, the rotational speed of the engine 8 can be controlled by actively adjusting the rotational speeds of the drive motor 1 and the generator motor 2.
When the gear ring of the planetary row is connected with the power generation motor, the planetary row system is convenient to integrate into the rotor of the power generation motor, the size and the weight of the power assembly are reduced, and meanwhile, the cost is effectively reduced.
Compared with the prior art, the utility model has the advantages that only 1 planetary row is arranged, redundant friction elements, cooling units and the like are omitted, and parts are reduced, so that the structure is relatively simple, and the purposes of low cost and higher reliability are achieved; the control system of the 1 planetary gear set is relatively simple, hydraulic units such as an oil pump, an electromagnetic valve and a pressure sensor are not needed, and the effect of controlling the rotation speed of the engine can be achieved by only adjusting the rotation speeds of the driving motor and the generating motor. The utility model has the advantages of relatively simple mechanical structure, easier control, and improved cost, assembly process and reliability.
Claims (7)
1. A double-motor power splitting and mixing system for a front-drive vehicle comprises a driving motor, a generating motor, a gear box input shaft, a driving shaft, an intermediate shaft, a wheel output shaft and 1 planetary row;
the planet carrier of the planet row is connected with an engine through the input shaft of the gear box, the gear ring of the planet row is connected with the rotor of the power generation motor, and the sun gear of the planet row is connected with one end of the driving shaft; the other end of the driving shaft is connected with a rotor of the driving motor, and a first-stage driving gear is arranged on the driving shaft;
the intermediate shaft is provided with a first-stage driven gear and a second-stage driving gear, and the first-stage driving gear is meshed with the first-stage driven gear; and the wheel output shaft is provided with a main reduction driven gear, and the second-stage driving gear is meshed with the main reduction driven gear.
2. The dual motor power split hybrid system for a front-drive vehicle of claim 1, wherein: the driving shaft and the first-stage driving gear are connected or fixedly connected into a whole through a key.
3. The dual motor power split hybrid system for a front-drive vehicle of claim 1, wherein: the intermediate shaft is connected with the first-stage driven gear and the second-stage driving gear through keys or is fixedly connected into a whole.
4. The dual motor power split hybrid system for a front-drive vehicle of claim 1, wherein: the wheel output shaft and the driving and driven gears are connected or fixedly connected into a whole through keys.
5. The dual motor power split hybrid system for a front-drive vehicle of claim 1, wherein: and the gear ring of the planet row is connected with the rotor of the power generation motor and is integrated into the rotor of the power generation motor.
6. The dual motor power split hybrid system for a front-drive vehicle of claim 1, wherein: the driving motor, the power generation motor and the engine are coaxially arranged.
7. The dual motor power split hybrid system for a front-drive vehicle of claim 1, wherein: the power generation motor forms linkage adjustment on the rotating speed of the engine through the planet row by adjusting the rotating speed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320347963.3U CN219749506U (en) | 2023-03-01 | 2023-03-01 | Dual-motor power split hybrid system for front-drive vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320347963.3U CN219749506U (en) | 2023-03-01 | 2023-03-01 | Dual-motor power split hybrid system for front-drive vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219749506U true CN219749506U (en) | 2023-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320347963.3U Active CN219749506U (en) | 2023-03-01 | 2023-03-01 | Dual-motor power split hybrid system for front-drive vehicle |
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| Country | Link |
|---|---|
| CN (1) | CN219749506U (en) |
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2023
- 2023-03-01 CN CN202320347963.3U patent/CN219749506U/en active Active
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