CN119239282A - A dual-motor two-speed power split drive system - Google Patents
A dual-motor two-speed power split drive system Download PDFInfo
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- CN119239282A CN119239282A CN202411746067.XA CN202411746067A CN119239282A CN 119239282 A CN119239282 A CN 119239282A CN 202411746067 A CN202411746067 A CN 202411746067A CN 119239282 A CN119239282 A CN 119239282A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- 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
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/36—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings
- B60K6/365—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings with the gears having orbital motion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- 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
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/26—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- 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
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Structure Of Transmissions (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
本发明属于车辆混合动力系统技术领域，提供了一种双电机两挡功率分流驱动系统，驱动系统设有发电电机和驱动电机，发电电机和发动机之间设有行星功率分流机构。行星功率分流机构将发动机的冗余部分动力传递至发电电机用于发电，另一部分与驱动电机传递到输出轴上的动力耦合驱动车辆，实现双电机混动提高驱动系统的节油效率，并能够降低换挡过程中驱动电机动力中断产生的顿挫感；采用变速装置和行星功率分流机构，实现动力来源切换；由于车辆动力可以由驱动电机和发动机的动力耦合提供，可以通过改变驱动电机提供的动力在总动力中所占比例，使发动机维持在高效工作区。
The present invention belongs to the technical field of vehicle hybrid power systems, and provides a dual-motor two-speed power split drive system, wherein the drive system is provided with a generator motor and a drive motor, and a planetary power split mechanism is provided between the generator motor and the engine. The planetary power split mechanism transmits the redundant power of the engine to the generator motor for power generation, and the other part is coupled with the power transmitted to the output shaft by the drive motor to drive the vehicle, thereby realizing dual-motor hybrid to improve the fuel-saving efficiency of the drive system, and can reduce the sense of frustration caused by the interruption of the drive motor power during the gear shifting process; a speed change device and a planetary power split mechanism are used to realize the switching of power sources; since the vehicle power can be provided by the power coupling of the drive motor and the engine, the proportion of the power provided by the drive motor in the total power can be changed to keep the engine in an efficient working area.
Description
Technical Field
The invention relates to the technical field of vehicle hybrid power systems, and particularly provides a double-motor two-gear power split driving system.
Background
The hybrid technology can obviously reduce fuel consumption and exhaust emission through the synergistic effect of the motor and the internal combustion engine. The traditional single-motor multi-gear hybrid power system only can adopt an engine driving mode when the electric quantity of a battery is insufficient, the oil saving rate is poor in efficiency, and the engine driving and the motor driving have the problem of power interruption in the gear shifting process. Other hybrid power speed change schemes are applied to a commercial vehicle, have limited speed ratio adjustment capability, are difficult to consider low-speed climbing capability and highest vehicle speed, and cannot effectively utilize an efficient working area of an engine or realize a direct driving function of the engine. The prior art CN116198312a provides a two-gear longitudinal rear-drive dual-motor hybrid system, which comprises an engine, a generator, a driving motor, an engine intermediate shaft, a transmission shaft, a first synchronizer and a second synchronizer. The engine is connected with the generator through an engine input shaft, the engine intermediate shaft and the output shaft are positioned on the same axis, and a first synchronizer is arranged on the output shaft and controls the disconnection and combination of power of the engine intermediate shaft and the output shaft. The output shaft is also provided with a second synchronizer, the transmission shaft is connected with the output shaft through two groups of gear sets with different speed ratios, and the second synchronizer controls the interruption of connection and the speed ratio of connection. In the gear shifting process of the speed changing device in the prior art, short-time power interruption exists, obvious setback feeling exists, and the range of the engine maintained in a high-efficiency working state is small. The inventors believe that there is a great room for improvement in the prior art.
Disclosure of Invention
The invention aims to provide a first-gear and second-gear switching structure which can meet the requirements of the climbing performance and the highest speed of the whole vehicle and can adjust the rotation speed of a generator to maintain an engine in a high-efficiency working area. And secondly, one part of the power of the engine is used for driving the vehicle, the redundant part can be used for generating electricity for the vehicle, the fuel saving efficiency is improved to the greatest extent, and the frustration caused by power interruption in the gear shifting process is avoided. The invention provides a double-motor two-gear power split driving system which comprises an input shaft, an output shaft and an engine, wherein the driving system is provided with a power generation motor and a driving motor, a planetary power split mechanism is arranged between the power generation motor and the engine, a speed change device is arranged between the driving motor and the output shaft, the input end of the input shaft is connected with the engine, the output end of the input shaft is connected with the planetary power split mechanism, and the output shaft is connected with the planetary power split mechanism. The power generation motor and the driving motor are matched with the planetary power splitting mechanism, the planetary power splitting mechanism transmits the redundant part of the power of the engine to the power generation motor for generating power, the other part of the power is coupled with the power transmitted to the output shaft by the driving motor to drive the vehicle, the double-motor hybrid power is realized, the fuel saving efficiency of the driving system is improved, gear shifting is realized by adopting different gear pairs of the speed changing device and the planetary power splitting mechanism, the low-speed climbing capability of the vehicle is improved, the highest vehicle speed requirement is met, the power source switching is realized by adopting the speed changing device and the planetary power splitting mechanism, the driving motor is disconnected with the input end of the output shaft when the speed changing device is in neutral gear, the engine can directly drive the vehicle through the output shaft, the power of the driving motor is coupled with the power of the engine when the speed changing device is in a first gear position or a second gear position, the power of the vehicle can be provided by changing the proportion of the power provided by the driving motor in the total power, the engine is maintained in a high-efficiency working area, the fuel saving efficiency of the driving system is improved, the driving motor is interrupted in a short time in the gear shifting process, the power source is matched with the driving motor and the power splitting mechanism is matched with the engine and the power of the driving motor and the driving motor is provided by the power through the power coupling of the output shaft to the power of the output shaft, the power is properly interrupted, the power in the gear shifting process can be reduced, the power is reduced, and the power is reduced is in the driving process is interrupted.
Preferably, the planetary power splitting mechanism comprises a planet carrier assembly and a gear ring, the output end of the input shaft is connected with the planet carrier assembly, and the gear ring is connected with the input end of the output shaft. The output end of the input shaft is connected with the planet carrier component, and is indirectly connected with the output shaft by adopting gear transmission, so that the power of the output end of the input shaft is conveniently coupled with the power of the input end of the output shaft, and the gear ring is connected with the input end of the output shaft, so that the power split of the engine is realized, part of the power of the engine is used for the output shaft, the redundant power is used for a power generation motor, the fuel-saving efficiency of a driving system is improved, and the engine is maintained in a high-efficiency working area.
Preferably, the rotor shaft of the power generation motor is provided with a brake, the movable end of the brake is connected with the rotor shaft of the power generation motor, and the fixed end of the brake is fixed with the shell of the driving system. And the combination and the separation of the brake realize the stop and the rotation of the sun gear of the planetary power splitting mechanism. When the vehicle is in a stationary state, the gear ring of the planetary power splitting mechanism cannot rotate, power is input from the planet carrier assembly, the sun gear is output, and the power generation motor realizes parking power generation.
Preferably, the driving motor includes a driving gear shaft and a driven gear shaft, and a speed change device is provided between the driving gear shaft and the driven gear shaft. The speed change device is adopted to control the transmission ratio of the driving gear shaft and the driven gear shaft, the speed ratio adjusting capability is improved, and the low-speed climbing capability and the highest vehicle speed requirement of the vehicle are considered.
Preferably, the planet carrier assembly and the input shaft are provided with an oil pump, the input shaft is internally provided with an oil duct, the oil duct is provided with at least two oil outlets, and the oil duct is connected with the power generation motor. The oil pump is arranged on the planet carrier assembly and the input shaft, so that internal parts in a driving system shell are convenient to lubricate and cool, the oil passage is arranged in the input shaft, the distance from the oil pump to the power generation motor and each gear pair is shortened, the cooling efficiency of the power generation motor is improved, and the lubrication state of the internal parts is kept for a long time.
Preferably, a torsional damper is provided between the engine and the input shaft. The torsional damper can reduce torsional rigidity of a joint part between the engine crankshaft and the input shaft, reduce torsional natural frequency of the transmission system, increase torsional damping of the transmission system, inhibit amplitude corresponding to torsional resonance, absorb pulsation impact in a gear shifting process and reduce the shock of power interruption in the gear shifting process.
Preferably, a constant mesh gear pair is arranged between the driven gear shaft and the output shaft of the driving motor. And a constant-meshed gear pair is arranged between the driven gear shaft and the output shaft, so that the output torque of the output shaft is increased, and the climbing capacity of the vehicle is improved.
Preferably, the speed change device is provided with at least two pairs of gear pairs, the gear pairs comprising a gear pair with a gear ratio greater than 1 and a gear pair with a gear ratio not exceeding 1. The gear pairs with different gear ratios correspond to different gears of the speed changing device, so that the low-speed climbing capability of the vehicle is respectively realized, and the highest speed requirement of the vehicle is met.
The invention provides a double-motor two-gear power split driving system which can realize the functions of pure first gear, pure second gear, mixed first gear, mixed second gear, direct engine driving and parking power generation; the first gear and the second gear switching structure can give consideration to the requirements of the climbing performance and the highest speed of the whole vehicle, the generator can be directly driven by the generator to ensure that the generator is still in a high-efficiency working area when the vehicle is at the high speed, the engine can still be in the high-efficiency working area by adopting the regulation of the rotating speed of the generator in a mixed mode, one part of the power of the engine is used for driving the vehicle, the redundant part can be used for generating power by the vehicle power generation motor and the driving motor, the planetary power splitting mechanism is matched with the planetary power splitting mechanism, the redundant part of the power of the engine is transmitted to the power generation motor for generating power, the other part of the power is coupled with the power transmitted to the driving motor to drive the vehicle, the double-motor mixed motion is realized, the gear switching is realized by adopting different gear pairs of a speed changing device and the planetary power splitting mechanism, the low-speed climbing capability of the vehicle is improved, the highest speed requirement is met, the power source switching is realized by adopting the speed changing device and the planetary power splitting mechanism, the speed changing device is in a neutral gear, the driving motor is disconnected with the input end of the output shaft, the engine can directly drive the vehicle through the output shaft, the power of the vehicle, the power of the motor is driven by the motor, the power of the vehicle is in a first gear position or a second gear position, the power is coupled with the power of the motor, the engine can be provided by the power in the driving region, and the power ratio of the engine can be changed, and the power ratio is high, which can be provided by the power and the power in the driving region and has the driving efficiency, the planetary power split mechanism is matched with the engine and the driving motor to provide power for the output shaft through power coupling, so that proper power compensation can be carried out through the engine, and the frustration caused by the power interruption of the driving motor in the gear shifting process is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those skilled in the art from this disclosure that the drawings described below are merely exemplary and that other embodiments may be derived from the drawings provided without undue effort.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic illustration of a transmission for a full electric first gear of the present invention;
FIG. 3 is a schematic illustration of a transmission of a full electric second gear of the present invention;
FIG. 4 is a schematic diagram of a hybrid first gear transmission of the present invention;
FIG. 5 is a schematic diagram of a hybrid two-gear transmission of the present invention;
FIG. 6 is a schematic diagram of an engine direct drive transmission of the present invention;
FIG. 7 is a schematic diagram of a transmission of park power generation according to the present invention;
FIG. 8 is a schematic view of another embodiment of the present invention;
fig. 9 is an enlarged view of a portion of the present invention.
The reference numerals illustrate 1 engine, 2 torsional damper, 3 planetary power splitting mechanism, 4 gear ring, 5 planetary carrier assembly, 6 output shaft, 7 casing, 8 sun gear, 9 brake, 10 driving motor, 11 second gear position, 12 first gear position, 13 speed variator, 14 power generating motor and 15 input shaft.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Example 1
Referring to fig. 1 and 8, a dual-motor two-gear power split driving system comprises an engine 1, a torsional damper 2, a planetary power split mechanism 3, a gear ring 4, a planet carrier assembly 5, an output shaft 6, a casing 7, a sun gear 8, a brake 9, a driving motor 10, a speed changing device 13, a power generation motor 14 and an input shaft 15, wherein the driving system is provided with the power generation motor 14 and the driving motor 10, the planetary power split mechanism 3 is arranged between the power generation motor 14 and the engine 1, the speed changing device 13 is arranged between the driving motor 10 and the output shaft 6, the input end of the input shaft 15 is connected with the engine 1, the output end of the input shaft 15 is connected with the planetary power split mechanism 3, and the output shaft 6 is connected with the planetary power split mechanism 3.
In the embodiment, the power generation motor 14 and the driving motor 10 are matched with the planetary power splitting mechanism 3, the planetary power splitting mechanism 3 comprises a planet carrier assembly 5, a sun gear 8 and a gear ring 4, the planet carrier assembly 5 transmits redundant part of power of the engine 1 to the power generation motor 14 for generating power through the sun gear 8, and the other part of the power is coupled with the power transmitted to the output shaft 6 by the driving motor 10 through the gear ring 4 to drive a vehicle, so that the aim of improving the fuel saving efficiency of a driving system by double-motor mixing is fulfilled.
In the embodiment, gear shifting is realized by adopting the meshing of different gear pairs of the speed changing device 13, namely the meshing of the first gear position 12 and the second gear position 11, so that the low-speed climbing capability of the vehicle is improved and the highest vehicle speed requirement is met.
In the embodiment, the transmission device 13 and the planetary power splitting mechanism 3 are adopted to realize power source switching, three power modes including pure electric power, mixed power and direct engine driving are realized, when the transmission device 13 is in a neutral gear, the driving motor 10 is disconnected from the input end of the output shaft 6, the engine 1 can directly drive the vehicle to run through the output shaft 6, when the transmission device 13 is in the first gear position 12 or the second gear position 11, the power of the driving motor 10 and the power of the engine 1 are coupled to drive the vehicle to run through the output shaft 6, the engine 1 stops working, the power of the driving motor 10 is reduced and increased through a constant-meshed gear pair to drive the vehicle to run, and as the power of the vehicle can be provided by the power coupling of the driving motor 10 and the engine 1, the engine 1 can be maintained in a high-efficiency working area by changing the proportion of the power provided by the driving motor 10 in the total power, and the fuel saving efficiency of a driving system is improved.
In this embodiment, because there is a short-time power interruption of the driving motor 10 in the gear shifting process of the speed changing device 13, the planetary power splitting mechanism 3 is adopted to cooperate with the engine 1 and the driving motor 10 to provide power for the output shaft 6 through power coupling, and appropriate power compensation can be performed through the engine 1, so that the aim of reducing the frustration caused by the power interruption of the driving motor 10 in the gear shifting process is achieved.
The planetary power splitting mechanism 3 comprises a planet carrier assembly 5 and a gear ring 4, wherein the output end of an input shaft 15 is connected with the planet carrier assembly 5, and the input end of the gear ring 4 is connected with the input end of an output shaft 6. The output end of the input shaft 15 is connected with the planet carrier assembly 5, and is indirectly connected with the output shaft 6 by adopting gear transmission, so that the power of the output end of the input shaft 15 is conveniently coupled with the power of the input end of the output shaft 6, and the gear ring 4 is connected with the input end of the output shaft 6, so that the power of the engine 1 is split, part of the power of the engine 1 is used for the output shaft 6, the redundant power is used for the power generation motor 14, the fuel saving efficiency of a driving system is improved, and the engine 1 is maintained in a high-efficiency working area.
The rotor shaft of the generator motor 14 is provided with a brake 9, the movable end of the brake 9 is connected with the rotor shaft of the generator motor 14, and the fixed end of the brake 9 is fixed with the casing 7 of the driving system. The brake 9 is combined and separated to stop and rotate the sun gear 8 of the planetary power splitting mechanism 3. When the vehicle is in a stationary state, the gear ring 4 of the planetary power split mechanism 3 cannot rotate, power is input from the planet carrier assembly 5, the sun gear 8 is output, and the power generation motor 14 realizes parking power generation.
The drive motor 10 includes a drive gear shaft and a driven gear shaft with a speed change device 13 interposed therebetween. The driving motor 10 realizes the change of the transmission ratio through a driving gear shaft and a driven gear shaft, adopts a speed change device 13 to control the transmission ratio of the driving gear shaft and the driven gear shaft, improves the speed ratio adjusting capability, and gives consideration to the low-speed climbing capability and the highest vehicle speed requirement of the vehicle.
As shown in fig. 8 and 9, an oil pump is arranged on the planet carrier assembly 5 and the input shaft 15, an oil passage is arranged in the input shaft 15, three oil outlets are arranged in the oil passage, and the oil passage is connected with the power generation motor 14. The oil pump is arranged on the planet carrier assembly 5 and the input shaft 15, so that internal parts in the driving system shell 7 can be conveniently lubricated and the motor can be conveniently cooled, the oil passage is arranged in the input shaft 15, the distance from the oil pump to the power generation motor 14 and each gear pair is shortened, the cooling efficiency of the power generation motor 14 is improved, and the lubrication state of the internal parts is maintained. Through the arrangement, the functions of pure first gear, pure second gear, mixed first gear, mixed second gear, direct driving of the engine 1 and parking power generation are realized. In other embodiments, the oil pump may be disposed at other positions, for example, the oil pump may be disposed at an output end of the engine 1, the oil pump may be disposed at an input end of the output shaft 6, or the oil pump may be disposed coaxially with the shaft, or the oil pump may be disposed parallel to the shaft through different transmission modes such as gears and sprocket chains.
A torsional damper 2 is provided between the engine 1 and the input shaft 15. The torsional damper 2 can reduce torsional rigidity of a joint part between a crankshaft of the engine 1 and the input shaft 15, reduce torsional natural frequency of a transmission system, increase torsional damping of the transmission system, inhibit amplitude corresponding to torsional resonance, and reduce the shock feeling of power interruption in a gear shifting process.
A constant mesh gear pair is arranged between the driven gear shaft of the driving motor 10 and the output shaft 6. And a constant-meshed gear pair is arranged between the driven gear shaft and the output shaft 6, so that the output torque of the output shaft 6 is increased, and the climbing capacity of the vehicle is improved.
The speed change device 13 is provided with two pairs of gear pairs including a gear pair having a gear ratio greater than 1 and a gear pair having a gear ratio not exceeding 1. The gear pairs with different gear ratios correspond to different gears of the speed changing device 13, so that the low-speed climbing capability of the vehicle is respectively realized, and the highest speed requirement of the vehicle is met.
As shown in fig. 2, the arrow direction is the power transmission direction, wherein in the case of a pure first gear, the transmission device 13 is located at the first gear position, the driving motor 10 transmits power to the output shaft 6 through the gear pair at the first gear position, the driven gear shaft and the constant meshed gear pair of the output shaft 6, and at this time, the engine 1 does not work, and the first motor rotates freely. The forward and reverse functions of the vehicle can be realized by adjusting the rotation direction of the drive motor 10.
As shown in fig. 3, the arrow direction is the power transmission direction, and when the vehicle is in the second gear, the transmission device 13 is located at the second gear position, the driving motor 10 transmits power to the output shaft 6 through the gear pair at the second gear position, the driven gear shaft and the constant meshed gear pair of the output shaft 6, the engine 1 does not work, and the power generation motor 14 rotates freely. The forward and reverse functions of the vehicle can also be achieved by adjusting the rotational direction of the drive motor 10.
As shown in fig. 4, the arrow direction is the power transmission direction, when the first gear is mixed, the speed change device 13 is positioned at the first gear position, the driving motor 10 transmits power to the output shaft 6 through the gear pair at the first gear position, the driven gear shaft and the constant meshed gear pair of the output shaft 6, the engine 1 transmits part of power to the output shaft 6 through the gear ring 4 through the planetary power splitting mechanism 3, the redundant part of power is used for generating power by the power generation motor 14, and the power of the engine 1 and the driving motor 10 is coupled on the output shaft 6 to drive the vehicle.
As shown in fig. 5, the arrow direction is the power transmission direction, when the second gear is mixed, the speed change device 13 is positioned at the second gear position, the driving motor 10 transmits power to the output shaft 6 through the gear pair at the second gear position, the driven gear shaft and the constant meshed gear pair of the output shaft 6, the engine 1 transmits part of power to the output shaft 6 through the planetary power splitting mechanism 3 through the gear ring 4, the redundant part of power is used for generating power by the power generation motor 14, and the power of the engine 1 and the driving motor 10 is coupled on the output shaft 6 to drive the vehicle.
As shown in fig. 6, the arrow direction is the power transmission direction, when the engine 1 is directly driven, the gear pairs of the transmission 13 in the neutral position, i.e., the first gear position and the second gear position 11 are not engaged, the driving motor 10 does not operate, the brake 9 locks the sun gear 8 and the generator motor 14, and the power of the engine 1 directly drives the vehicle to run through the planetary power split mechanism 3.
As shown in fig. 7, the arrow direction is the power transmission direction, the transmission 13 is in the neutral position, the drive motor 10 is not operated, the brake 9 is disengaged, the vehicle is stationary, the ring gear 4 cannot rotate, power is input from the carrier assembly 5 to the sun gear 8 and output, and the generator motor 14 generates power.
The invention provides a double-motor two-gear power split driving system which can realize the functions of pure first gear, pure second gear, mixed first gear, mixed second gear, direct driving of an engine 1 and parking power generation; the first gear and the second gear switching structure can give consideration to the requirements of the climbing performance and the highest speed of the whole vehicle, the generator can be directly driven by the generator to ensure that the generator is still in a high-efficiency working area when the vehicle is at a high speed, the engine 1 can still be in the high-efficiency working area by adopting the regulation of the rotating speed of the generator in a mixed mode, one part of the power of the engine 1 is used for driving the vehicle, the redundant part can be used for generating power of the vehicle, the fuel saving efficiency is improved to the greatest extent, the power generating motor 14 and the driving motor 10 are matched with the planetary power splitting mechanism 3, the planetary power splitting mechanism 3 transmits the power of the redundant part of the engine 1 to the power generating motor 14 for generating power, the other part of the power is coupled with the power transmitted to the output shaft 6 of the driving motor 10 to drive the vehicle, the fuel saving efficiency of the driving system is improved, the gear switching is realized by adopting the meshing of different gear pairs of the speed changing device 13 and the planetary power splitting mechanism 3, the low-speed climbing capability of the vehicle is improved, the highest speed requirement is met, when the speed changing device 13 is in a neutral gear, the driving motor 10 is disconnected from the input end of the output shaft 6 of the engine 1, the engine 1 can be directly driven by the driving motor 6 through the speed changing device 13 and the power of the engine 1, the engine 1 is in the position of the first gear and the power of the engine 6 or the second gear is coupled with the power of the engine 6 when the engine 1 is in the position of the power driving device 10 and the power is in the position of the driving device 6, the engine 1 can be maintained in a high-efficiency working area by changing the proportion of the power provided by the driving motor 10 in the total power, so that the fuel-saving efficiency of a driving system is improved, and as the driving motor 10 power is interrupted in a short time in the gear shifting process of the speed changing device 13, the planetary power splitting mechanism 3 is adopted to match the engine 1 and the driving motor 10 to provide power for the output shaft 6 through power coupling, so that proper power compensation can be performed through the engine 1, and the pause and frustration caused by the power interruption of the driving motor 10 in the gear shifting process is reduced.
The above examples and/or embodiments are merely illustrative of preferred embodiments and/or implementations for implementing the technology of the present invention, and are not intended to limit the implementation of the technology of the present invention in any way, and any person skilled in the art should consider that the technology or embodiments substantially identical to the technology of the present invention may be modified slightly and modified to other equivalent embodiments without departing from the scope of the technical means disclosed in the present disclosure.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411746067.XA CN119239282A (en) | 2024-12-02 | 2024-12-02 | A dual-motor two-speed power split drive system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202411746067.XA CN119239282A (en) | 2024-12-02 | 2024-12-02 | A dual-motor two-speed power split drive system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210174609U (en) * | 2019-07-09 | 2020-03-24 | 长城汽车股份有限公司 | Hybrid vehicles and their powertrains and transmissions |
| CN116538280A (en) * | 2023-05-30 | 2023-08-04 | 重庆长安汽车股份有限公司 | Concentric shaft lubricating structure, double-motor hybrid power transmission mechanism and vehicle |
| CN116691317A (en) * | 2023-06-26 | 2023-09-05 | 无锡明恒混合动力技术有限公司 | Power split hybrid power speed change mechanism and speed change method |
| CN220281113U (en) * | 2023-08-01 | 2024-01-02 | 安徽江淮汽车集团股份有限公司 | Multi-gear power splitting hybrid driving system |
| CN118651049A (en) * | 2024-07-15 | 2024-09-17 | 哈尔滨东安汽车发动机制造有限公司 | A front planetary gear structure for hybrid vehicle |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN210174609U (en) * | 2019-07-09 | 2020-03-24 | 长城汽车股份有限公司 | Hybrid vehicles and their powertrains and transmissions |
| CN116538280A (en) * | 2023-05-30 | 2023-08-04 | 重庆长安汽车股份有限公司 | Concentric shaft lubricating structure, double-motor hybrid power transmission mechanism and vehicle |
| CN116691317A (en) * | 2023-06-26 | 2023-09-05 | 无锡明恒混合动力技术有限公司 | Power split hybrid power speed change mechanism and speed change method |
| CN220281113U (en) * | 2023-08-01 | 2024-01-02 | 安徽江淮汽车集团股份有限公司 | Multi-gear power splitting hybrid driving system |
| CN118651049A (en) * | 2024-07-15 | 2024-09-17 | 哈尔滨东安汽车发动机制造有限公司 | A front planetary gear structure for hybrid vehicle |
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