CN106564361B - Double-planet-row hybrid power system and hybrid power vehicle - Google Patents
Double-planet-row hybrid power system and hybrid power vehicle Download PDFInfo
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- CN106564361B CN106564361B CN201610846570.1A CN201610846570A CN106564361B CN 106564361 B CN106564361 B CN 106564361B CN 201610846570 A CN201610846570 A CN 201610846570A CN 106564361 B CN106564361 B CN 106564361B
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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 ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- 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 ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 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 ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/24—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 ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 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 combustion engines
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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 ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- 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 ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 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 ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 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 ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 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 ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- 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 ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 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 ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 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 ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 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 ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 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 ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- 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 ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—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 ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
- B60K6/48—Parallel type
- B60K6/485—Motor-assist type
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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)
- Hybrid Electric Vehicles (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Structure Of Transmissions (AREA)
Abstract
The invention relates to the field of automobiles, and discloses a double-planet-row hybrid power system and a hybrid power vehicle, which comprise an engine; a first motor; a second motor; an output member; a first planetary gear set having a first sun gear, a first carrier, and a first ring gear; a second planetary gear set having a second sun gear, a second planet carrier, and a second ring gear; a first sun gear disposed to rotate with the first motor; the first gear ring and the second sun gear are arranged to simultaneously rotate together with the second motor; the second ring gear is arranged to rotate with the output member; and, a first torque transmitting member, a second torque transmitting member, and a brake member; a first torque transmitting member selectively engagable to transmit torque of the engine to the first carrier; a second torque transmitting member selectively engagable to simultaneously transmit torque from the first carrier to the second ring gear and the output member; the brake member is selectively engageable to brake the second carrier.
Description
Technical Field
The invention relates to the field of automobiles, in particular to a double-planet-row hybrid power system and a hybrid power vehicle.
Background
At present, a driving system of a hybrid electric vehicle (including a PHEV) mainly comprises three basic forms of series connection, parallel connection and series-parallel connection (power split type). In a series connection mode, the engine and the output shaft are not mechanically connected, so that the optimal control of the rotating speed/torque can be realized, but all energy of the engine can be transmitted to the output shaft only through twice conversion between mechanical power/electric power, and the energy loss is large; the parallel connection type transmission efficiency is high, but the engine and the output shaft are mechanically connected, so that the engine cannot be always in a better working area and is usually used in a medium-high speed occasion; the series-parallel connection mode combines the advantages of series connection and parallel connection, can realize the optimal control of the engine and the high-efficiency control of medium and high speed, but has higher requirement on the limit power of the motor and lower transmission efficiency when the vehicle starts. In conclusion, the ideal driving scheme is based on a series-parallel power driving system, and functions of pure electric starting, medium-low speed power splitting, direct driving or parallel driving of a medium-high speed engine and the like are achieved.
The series-parallel hybrid power system mainly adopts a planetary mechanism as a power dividing device and is divided into four basic forms of speed dividing and torque converging, speed dividing and speed converging, torque dividing and speed converging and torque dividing and converging according to the positions of a motor and an engine in the mechanism. The current mainstream planetary hybrid power system is a Toyota THS (HSD) single E-CVT mode hybrid system, and is used for carrying Toyota Precise, carragola, redi, camry, lexus HS250h and Hanranda, ford Escape and other vehicle types; and the other is a universal single E-CVT mode system and a double E-CVT mode system which are used for carrying vehicle models such as Voltamida, karred, benz ML450 and the like. The Toyota hybrid system can realize pure electric, E-CVT hybrid modes, regenerative braking and other modes. According to different grades of vehicle types carried by the electric vehicle, the electric vehicle is divided into a single-planet-row system and a double-planet-row system, the purpose is to increase the transmission torque of the end of a driving motor by newly adding a planet-row structure speed reduction ratio (1 + k), and reduce the requirement on the torque of the driving motor (especially under the pure electric starting condition), so that the volume and the weight of the driving motor are reduced. The universal single-mode system can realize pure electric modes, series range extension modes, E-CVT hybrid power modes, regenerative braking modes and the like, and comprises 1 planet row, 2 clutches and 1 braking component. Although the system has 1 more series range-extending modes than THS, the system efficiency is low, and the system has more operating elements and complex structure.
Disclosure of Invention
The invention aims to provide a double-planet-row hybrid power system with a large transmission ratio and pure electric starting and capable of realizing a direct-drive/parallel-drive mode, so that the torque requirement of a drive motor during pure electric starting is reduced, and the transmission efficiency of the direct-drive/parallel-drive mode is improved under a medium-high speed working condition.
In order to achieve the above object, the present invention provides a double planetary row hybrid system, comprising an engine; a first motor; a second motor; an output member; a first planetary gear set having a first sun gear, a first carrier, and a first ring gear; a second planetary gear set having a second sun gear, a second planet carrier, and a second ring gear; wherein the first sun gear is disposed to rotate with the first motor; the first gear ring and the second sun gear are arranged to simultaneously rotate together with the second motor; the second ring gear is arranged to rotate with the output member; and, a first torque transmitting member, a second torque transmitting member, and a brake member; wherein the first torque transmitting member is selectively engageable to transmit torque of the engine to the first carrier; the second torque transmitting member is selectively engageable to simultaneously transmit torque of the first carrier to the second ring gear and the output member; the brake member is selectively engageable to brake the second planet carrier; wherein the first torque transmitting member, the second torque transmitting member and the brake member are combinable in different combinations to establish two electric only drive modes, a hybrid drive mode, a direct drive/parallel drive mode and a brake generating mode.
Preferably, a third torque transmitting member selectively engagable to ground the second carrier to the second sun gear and remain circumferentially stationary; the first, second, third and brake members are combinable in different combinations to establish three electric only drive modes, two hybrid drive modes, two direct drive/parallel drive modes and two brake generating modes.
As a preferred scheme, the pure electric drive mode comprises a first pure electric drive mode and a second pure electric drive mode; wherein in the first electric-only drive mode, the second torque transmitting member is in combined engagement with the braking member and torque is output by the first electric machine; in the second electric-only drive mode, only the brake member is engaged and torque is output by the second electric machine.
Preferably, the electric-only drive modes include a third electric-only drive mode in which only the third torque-transmitting member is engaged and torque is output by the second electric machine.
Preferably, the hybrid drive modes include a first hybrid drive mode in which the first torque transmitting member is in combined engagement with the brake member; the transmission of the output torque of the engine is split into a mechanical transmission path and an electric power transmission path by the first planetary gear set, and the torque transmitted by the two paths is combined to the output member by the second planetary gear set.
Preferably, the hybrid drive modes include a second hybrid drive mode in which the first torque transmitting member is in combined engagement with the third torque transmitting member; the transmission of the output torque of the engine is split into a mechanical transmission path and an electric power transmission path by the first planetary gear set, and the torque transmitted by the two paths is combined to the output member by the second planetary gear set.
Preferably, the direct drive/parallel drive mode includes a first direct drive/parallel drive mode in which the first torque transfer member and the second torque transfer member are combined and torque is output by both the engine and the second electric machine.
Preferably, the direct drive/parallel drive mode includes a second direct drive/parallel drive mode in which the first torque transfer member, the second torque transfer member and the brake member are combined and torque is output by both the engine and the second electric machine.
Preferably, the braking-power generation mode includes a first braking-power generation mode in which only the braking member is engaged and torque is transmitted from the output member to the second motor, and at this time, the second motor functions as a generator.
Preferably, the braking-power generation mode includes a second braking-power generation mode in which only the third torque transmitting member is engaged and torque is transmitted from the output member to the second electric machine, and at this time, the second electric machine functions as a generator.
As a preferred scheme, the electric vehicle further comprises a power supply module, wherein the power supply module is provided with a battery and a power converter, and electric energy of the battery is converted by the power converter and then is respectively transmitted to the first motor or the second motor; or the electric energy is converted by the power converter and then is transmitted to the battery.
Preferably, the vehicle further comprises a torque receiving unit connected to the output member to receive torque from the output member.
In order to solve the same problem, the invention also discloses a hybrid vehicle and the double-planet-row hybrid power system of any scheme.
According to the double-planet-row hybrid power system, the two planetary gear sets, the engine, the two motors and the torque transmission mechanism are arranged and combined, so that pure electric starting with a large transmission ratio in a pure electric driving mode can be realized, the requirement on the output torque of the motors can be greatly reduced, and the size and the power of the motors can be reduced; in addition, a direct-drive/parallel-connection drive mode can be realized, when the direct-drive speed ratio of the engine is 1 (the engine is directly connected with a drive output member), the direct-drive/parallel-connection drive mode can be used in medium and high speed working conditions to improve the transmission efficiency of the system, and when the torque of the engine cannot meet the requirement, the first motor and the second motor can serve as the drive motors to realize the parallel-connection mode, so that the output power of the system under the high speed working condition is improved.
Drawings
FIG. 1 is a schematic connection diagram of a dual planetary row hybrid powertrain in accordance with a preferred embodiment of the present invention;
fig. 2 is a schematic connection structure of a double planetary row hybrid system according to another preferred embodiment of the present invention.
Wherein, 1, an engine; 2. a first planetary gear set; 21. a first sun gear; 22. a first carrier; 23. a first ring gear; 3. a second planetary gear set; 31. a second sun gear; 32. a second planet carrier; 33. a second ring gear; 4. a first motor; 5. a second motor; 6. a first torque transmitting member; 7. a second torque transmitting member; 8. a brake member; 9. a third torque transmitting member; 10. an output member; 11. a power converter; 12. a battery; 13. a differential assembly; 14. a torsional vibration damper.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The engine in the embodiment of the invention is a broad concept, and the specific form of the engine can be a power output element except for an electric motor, such as a gasoline engine, a diesel engine, a fuel cell engine, an air engine and the like; the meaning of the motor in the embodiment of the invention comprises a motor and a generator, and the specific meaning of the motor has different meanings according to different working modes of the system, for example, the motor is used as the generator in a braking and generating mode and used as the motor in other modes; the term "rotate together" in the practice of the present invention means that the two members that rotate together can always be relatively stationary in the direction of rotation about their axes, including the case where neither member rotates at the same time; in the embodiment of the invention, when one of the torque transmission members or the brake members is not mentioned to be combined, the torque transmission member or the brake member which is not mentioned is in a non-combined state by default.
Example 1
As shown in fig. 1, a double planetary gear hybrid system according to an embodiment of the present invention is schematically shown, which includes an engine 1, a first planetary gear set 2, a second planetary gear set 3, a first electric machine 4, a second electric machine 5, an output member 10; wherein the first planetary gear set 2 is provided with a first sun gear 21, a first carrier 22, and a first ring gear 23, and the second planetary gear set 3 is provided with a second sun gear 31, a second carrier 32, and a second ring gear 33; the first sun gear 21 is arranged to rotate with the rotor of the first electric machine 4, the first ring gear 23 and the second sun gear 31 are arranged to simultaneously rotate with the rotor of the second electric machine 5; the second ring gear 33 is provided to rotate together with the output member 10 (e.g., output gear, output shaft, etc.); and, a first torque transmitting member 6, a second torque transmitting member 7 and a brake member 8; wherein the first torque transmitting member 6 is selectively engageable to transmit torque of the engine 1 to the first carrier 22 so that the first carrier 22 is rotatable with the output end shaft of the engine 1; the second torque transmitting member 7 is selectively engageable to simultaneously transmit torque from the first carrier 22 to the second ring gear 33 and the output member 10 such that the second ring gear 33 and the output member 10 are rotatable with the first carrier 22; the brake member 8 is selectively engageable to brake the second planet carrier 32; further, a torsional damper 14 may be provided between the output end of the engine 1 and the input end of the first torque transmission member 6 to absorb vibration from the end of the engine 1 or the end of the first torque transmission member 6 due to a sudden change in torque, so that the system tends to be smooth.
As shown in table 1, the operating logic of the dual planetary hybrid powertrain system of the embodiment of the present invention is schematically enumerated, and when the first torque transmission member 5, the second torque transmission member 7 and the brake member 8 are combined in different combinations, two electric only driving modes, one hybrid driving mode, one direct drive/parallel drive mode and one brake generating mode can be established.
With reference to fig. 1 and table 1, in the dual planetary hybrid powertrain according to the embodiment of the present invention, when the second torque transmitting member 7 and the braking member 8 are combined, a first electric-only driving mode may be implemented, and a transmission ratio between the input end and the output end in the first electric-only driving mode is: i =1+ k2, where k is a characteristic parameter of the planetary gear set, equal to the ratio of the number of teeth of the ring gear to the number of teeth of the sun gear, k1 corresponds to a characteristic parameter of the first planetary gear set 2, and k2 corresponds to a characteristic parameter of the second planetary gear set 3; in general, the value of k is k = 1.5-4, so that the value of the transmission ratio i in the first pure electric drive mode can be calculated to be 4.75-21, the rated output torque of the drive motor can be greatly reduced when the system works in the first pure electric drive mode, the size and the rated power of the drive motor can be reduced, and the first pure electric drive mode is generally used for a large-load working condition of pure electric starting.
In the first electric-only drive mode, the second torque-transmitting member 7 and the brake member 8 are engaged in combination, with the first electric machine 4 outputting torque as a motor, the torque output by the first electric machine 4 being transmitted through the first sun gear 21 of the first planetary gear set 2 to the first carrier 22, and split by the first carrier 22 into two torque-transmitting paths, one of which is transmitted from the first carrier 22 to the second torque-transmitting member 7, and then transmitted from the second torque-transmitting member 7 to the output member 10; the other is transmitted from the first planet carrier 22 to the first gear ring 23, then from the first gear ring 23 to the second sun gear 31, then from the second sun gear 31 to the second planet carrier 32, and finally to the output member 10 through the second gear ring 33; in addition, if the output torque of the first electric machine 4 does not meet the working condition, the second electric machine 5 can be started at the same time as the auxiliary output torque.
As shown in fig. 1 and table 1, in the double-planetary hybrid system according to the embodiment of the present invention, when only the brake member 8 is engaged and the second electric machine 5 is used as a motor to output a torque, a second pure electric drive mode may be implemented, in which the transmission ratio is i = k2, and the second pure electric drive mode is used for a drive condition of a medium-high speed vehicle and a small load when the SOC is high, and in which the torque of the second electric machine 5 is transmitted to the second carrier 32 through the second sun gear 31 and finally transmitted to the output member 10 through the second ring gear 33.
Referring to fig. 1 and table 1, in the dual planetary hybrid system according to the embodiment of the present invention, when the first torque transmission member 6 is combined with the brake member 8, the first hybrid driving mode can be implemented, and the dual planetary hybrid system is generally applied to the vehicle starting or middle and low speed operating condition when the SOC is low. In the first hybrid drive mode, the output torque of the engine 1 is split out of two torque transmission routes through the first planetary gear set 2. One is transmitted to the output through a mechanical connection: the output torque of the engine 1 is transmitted to the first ring gear 23 via the first carrier 22, then transmitted to the second sun gear 31 via the first ring gear 23, then transmitted to the second carrier 32 via the second sun gear 31, and finally transmitted to the output member 10 via the second ring gear 33; second, transmit to the output through the electrical connection: the output torque of the engine 1 is transmitted to the first sun gear 21 through the first carrier 22, then transmitted to the first motor 4 through the first sun gear 21, then converted into electric power by the first motor 4, transmitted to the second motor 5 through an electric system, then transmitted to the second sun gear 31 through the second motor 5, then transmitted to the second carrier 32 through the second sun gear 31, and finally transmitted to the output member 10 through the second ring gear 33. When the battery SOC is too low to meet the pure electric starting, the mode can be used for vehicle starting, the first motor 4 can serve as a starter to start the engine 1, and then the engine 1 outputs torque to finish the vehicle starting. The rotating speed n1 of the engine 1, the rotating speed n4 of the first motor 4 and the rotating speed of the first gear ring 23 satisfy the following relation: n4+ k1 × n23- (1 + k 1) × n1=0, where n23 is linearly related to the output rotational speed and the vehicle speed. As the vehicle speed increases, the engine 1 speed n1 can be made to be in the economy zone when adjusted by the motor 4. In this first hybrid mode, the first and second electric machines 4 and 5 may act as motors or generators depending on operating conditions. However, in the first hybrid mode, since the brake member 8 is engaged, n23= n31= -k2 × n33= -k2 × n10 is obtained, and it can be seen from the above relational expression that the rotation speed of the first electric machine 4 increases as the vehicle speed increases when the rotation speed of the engine 1 is constant.
Referring to fig. 1 and table 1, the dual planetary row hybrid system according to the embodiment of the present invention can implement a first direct drive/parallel drive mode when the first torque transmission member 6 is combined with the second torque transmission member 7 and simultaneously the engine 1 and the second motor 5 output torques; the first direct-drive/parallel-drive mode has the function that when the output torque of the engine 1 is insufficient, additional output torque can be provided through the second motor 5, and the parallel-drive mode is realized, so that the output power of the double-planet-row hybrid power system is improved; in the first direct drive/parallel drive mode, the output torque is divided into two transmission routes and finally converged to the output member 10, specifically, the output torque of the engine 1 is directly transmitted to the output member 10 after passing through the first torque transmission member 6 and the second torque transmission member 7; the output torque of the second electric machine 5 is transmitted from the second sun gear 31 to the second carrier 32, and finally to the output member 10 via the second ring gear 33.
Referring to fig. 1 and table 1, in the hybrid system with two planetary gear sets according to the embodiment of the present invention, when only the braking component 8 is combined, a first braking power generation mode may be implemented, in the first braking power generation mode, during a long-time braking process of a vehicle running at a high speed, when a brake is applied, the motor is driven to rotate to implement braking power generation, and then the regenerated energy is transmitted to the battery 12 through the power converter 11 to be stored; in the first braking power generation mode, the second motor 5 is used as a generator, and the torque of the output member 10 is transmitted to the second planet carrier 32 through the second ring gear 33 and then transmitted to the second sun gear 31 through the second planet carrier 32, so as to drive the rotor of the second motor 5 to rotate, thereby realizing the power generation function of the second motor 5.
TABLE 1
Example two
As shown in fig. 2, schematically showing a double planetary row hybrid system of another embodiment of the present invention, the structure of the double planetary row hybrid system of the present embodiment is substantially the same as that of the first embodiment, except that the double planetary row hybrid system of the present embodiment further includes a third torque transmission member 9, and the third torque transmission member 9 can be selectively combined to fixedly connect the second carrier 32 and the second sun gear 31 together to keep the circumferential direction stationary; therefore, more driving modes can be realized on the basis of the driving modes which can be realized in embodiment 1, and the richness of the power output modes of the double-planetary-row hybrid power system in the embodiment of the invention is increased.
As shown in table 2, the operating logic of the dual planetary hybrid powertrain system of the embodiment of the present invention is schematically outlined, and when the first torque transmitting member 5, the second torque transmitting member 7, the third torque transmitting member 9 and the brake member 8 are combined in different combinations, three electric only driving modes, two hybrid driving modes, two direct drive/parallel driving modes and two brake generating modes can be established.
Referring to fig. 2 and table 2, in the hybrid system with two planetary rows according to the embodiment of the present invention, when only the third torque transmission member 9 is engaged and the second electric machine 5 outputs a torque, a third pure electric drive mode may be implemented, where a transmission ratio in the third pure electric drive mode is i =1, and the hybrid system may be used in a high-speed and low-load operating condition at a vehicle speed when the SOC is high; the output torque of the second electric machine 5 is transmitted to the output member 10 through the second carrier 3 at the original rotation speed.
With reference to fig. 2 and table 2, the dual planetary hybrid powertrain system according to the embodiment of the present invention can implement a second hybrid driving mode when the first torque transmitting member 6 is combined with the third torque transmitting member 9; the second hybrid drive mode is generally applied to vehicle launch or medium and low speed conditions when SOC is low. In the second hybrid drive mode, the second carrier 32 of the second planetary gear set 3 is grounded to the second sun gear 31 and remains circumferentially stationary, as a result of the engagement of the third torque transmitting member 9, so that the second planetary gear set 3 can only rotate as a whole. The output torque of the engine 1 is split into two torque transmission paths by the first planetary gear set 2. One is transmitted to the output end through mechanical connection: the output torque of the engine 1 is transmitted to the first ring gear 23 through the first carrier 22, then transmitted to the second planetary gear set 3 through the first ring gear 23, and then directly transmitted to the output member 10; and the second is transmitted to the output end through electrical connection: the output torque of the engine 1 is transmitted to the first sun gear 21 through the first carrier 22, then transmitted to the first motor 4 through the first sun gear 21, then converted into electric power by the first motor 4, transmitted to the second motor 5 through an electric system, and then transmitted to the second planetary gear set 3 through the second motor 5, and then directly transmitted to the output member 10. When the battery SOC is too low to satisfy the pure electric start, the second hybrid drive mode may be used for vehicle start, and at this time, the first motor 4 may serve as a starter to start the engine 1, and then the vehicle start may be completed by the output torque of the engine 1. The rotating speed n1 of the engine 1, the rotating speed n4 of the motor 4 and the rotating speed of the first gear ring 23 satisfy the following relations: n4+ k1 × n23- (1 + k 1) × n1=0, where n23 is linearly related to the output rotational speed. As the vehicle speed increases, the engine 1 speed n1 can be adjusted to be in the economy zone by the motor 4. In this second hybrid drive mode, the first electric machine 4 and the second electric machine 5 act as motors or generators depending on the operating conditions. Unlike the first hybrid drive mode, in which the third torque transmission member 9 is engaged, the second planetary gear set 3 rotates integrally with n23= n31= n10, and when the engine 1 rotates at a constant speed, the first electric machine 4 rotates at zero and then decreases at a negative speed, and the effect of the first electric machine is gradually changed from the generator to the motor, as compared with the first hybrid drive mode, the second hybrid drive mode reduces the rotation speed requirement of the first electric machine 4 under the same operating condition.
Referring to fig. 2 and table 2, in the dual planetary row hybrid system according to the embodiment of the present invention, when the first torque transmission member 6, the second torque transmission member 7 and the brake member 8 are combined and simultaneously the engine 1 and the second electric machine 5 output torques, a second direct drive/parallel drive mode may be implemented; the second direct-drive/parallel-drive mode has the function that when the output torque of the engine 1 is insufficient, additional output torque can be provided through the second motor 5, and the parallel-drive mode is realized, so that the output power of the double-planet-row hybrid power system is improved; in the second direct drive/parallel drive mode, the output torque is finally converged to the output member 10 through two transmission routes, specifically, the output torque of the engine 1 is directly transmitted to the output member 10 after passing through the first torque transmission member 6 and the second torque transmission member 7, and the output torque of the second motor 5 is transmitted to the second carrier 32 through the second sun gear 31 and is finally transmitted to the output member 10 through the second ring gear 33.
Referring to fig. 2 and table 2, in the hybrid system with two planetary gear sets according to the embodiment of the present invention, when only the third torque transmission member 9 is combined, a second braking power generation mode may be implemented, in the second braking power generation mode, when a vehicle running at a high speed is braked for a long time, and when the vehicle is braked for a long time, the motor is driven to rotate to implement braking power generation, and then the regenerated energy is transmitted to the battery 12 through the power converter 11 to be stored; in the second braking power generation mode, the second electric machine 5 is used as a generator, and the torque of the output member 10 is integrally rotated by the second planetary gear set 3 to drive the rotor of the second electric machine 5 to rotate, so that the second electric machine 5 can generate power.
TABLE 2
Referring to fig. 1 and 2, the dual planetary gear hybrid power system in the embodiment of the present invention further includes a power module, where the power module is provided with a power converter 11 and a battery 12, and electric energy of the battery 12 is converted by the power converter 11 and then respectively transmitted to the first motor 4 and/or the second motor 5; or the electric energy generated by the first motor 4 or the second motor 5 is converted by the power converter 11 and then is transmitted to the battery 12 for storage.
Referring to fig. 1 and 2, the dual planetary row hybrid system according to the embodiment of the present invention further includes a torque receiving unit 13 (e.g., a differential, a reducer, etc.), and the torque receiving unit 13 is connected to the output member 10 to receive torque from the output member 10.
In order to solve the same problem, the embodiment of the invention also discloses a hybrid vehicle which comprises the double-planet-row hybrid power system in the embodiment.
In conclusion, the double-planet-row hybrid power system can realize pure electric starting with large transmission ratio in a pure electric driving mode through the arrangement and combination of the two planetary gear sets, the engine, the two motors and the torque transmission mechanism, can greatly reduce the requirement on the output torque of the motors, and further can reduce the volume and the power of the motors; in addition, a direct-drive/parallel-connection drive mode can be realized, when the direct-drive speed ratio of the engine is 1 (the engine is directly connected with the drive output member), the direct-drive/parallel-connection drive mode can be used for medium-high speed working conditions to improve the transmission efficiency of the system, and when the torque of the engine cannot meet the requirement, the first motor and the second motor can serve as the drive motors to realize the parallel-connection mode, so that the output power of the system under the high-speed working conditions is improved.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (13)
1. A double-planet row hybrid power system is characterized by comprising an engine; a first motor; a second motor; an output member; a first planetary gear set having a first sun gear, a first planet carrier, and a first ring gear; a second planetary gear set having a second sun gear, a second planet carrier, and a second ring gear;
wherein the first sun gear is disposed to rotate with the first motor; the first gear ring and the second sun gear are arranged to simultaneously rotate together with the second motor; the second ring gear is arranged to rotate with the output member;
and, a first torque transmitting member, a second torque transmitting member, and a brake member; wherein the first torque transmitting member is selectively engageable to transmit torque of the engine to the first carrier; the second torque transmitting member is selectively engageable to simultaneously transmit torque of the first carrier to the second ring gear and the output member; the brake member is selectively engageable to brake the second carrier;
wherein the first torque transmitting member, the second torque transmitting member and the brake member are combinable in different combinations to establish two electric only drive modes, a hybrid drive mode, a direct drive/parallel drive mode and a brake generating mode.
2. A double row planetary hybrid powertrain as in claim 1 further comprising a third torque transmitting member selectively engagable to ground the second carrier to the second sun gear circumferentially stationary; the first, second, third and brake members are combinable in different combinations to establish three electric only drive modes, two hybrid drive modes, two direct drive/parallel drive modes and two brake generating modes.
3. The double row planetary hybrid system according to claim 1 or 2, wherein the electric-only drive modes include a first electric-only drive mode and a second electric-only drive mode; wherein in the first electric-only drive mode, the second torque transmitting member is in combined engagement with the braking member and torque is output by the first electric machine; in the second electric-only drive mode, only the brake member is engaged and torque is output by the second electric machine.
4. The dual bank hybrid powertrain system of claim 2, wherein the electric-only drive mode includes a third electric-only drive mode in which only the third torque transmitting member is engaged and torque is output by the second electric machine.
5. The dual planetary row hybrid powertrain system of claim 1 or 2, wherein the hybrid drive mode includes a first hybrid drive mode in which the first torque transmitting member is in combined engagement with the brake member; the transmission of the output torque of the engine is split into a mechanical and an electrical power transmission path through the first planetary gear set and the torque transmitted by the two paths is combined to the output member through the second planetary gear set.
6. The dual bank hybrid powertrain system of claim 2, wherein the hybrid drive mode comprises a second hybrid drive mode in which the first torque transmitting member is in combined engagement with the third torque transmitting member; the transmission of the output torque of the engine is split into a mechanical transmission path and an electric power transmission path by the first planetary gear set, and the torque transmitted by the two paths is combined to the output member by the second planetary gear set.
7. The dual bank hybrid system of claim 1 or 2 wherein the direct drive/parallel drive mode includes a first direct drive/parallel drive mode in which the first and second torque transfer members are combined and torque is simultaneously output by the engine and the second electric machine.
8. The dual bank hybrid system as set forth in claim 2 wherein said direct drive/parallel drive mode includes a second direct drive/parallel drive mode in which said first torque transfer member, said second torque transfer member and said brake member are combined and torque is simultaneously output by said engine and said second electric machine.
9. The dual bank hybrid system of claim 1 or 2 wherein the braking-electric mode includes a first braking-electric mode in which only the braking members are engaged and torque is transmitted by the output member to the second electric machine, with the second electric machine functioning as a generator.
10. The dual bank hybrid system of claim 2 wherein the braking-electric mode includes a second braking-electric mode in which only the third torque transmitting member is engaged and torque is transmitted from the output member to the second electric machine, with the second electric machine functioning as a generator.
11. The double-planet-row hybrid power system according to claim 1 or 2, further comprising a power module, wherein the power module is provided with a battery and a power converter, and electric energy of the battery is converted by the power converter and then is respectively transmitted to the first motor or the second motor; or the electric energy is converted by the power converter and then is transmitted to the battery.
12. The dual bank hybrid system of claim 1 or 2, further comprising a torque receiving unit connected with the output member to receive torque from the output member.
13. A hybrid vehicle comprising the double planetary row hybrid system as claimed in any one of claims 1 to 12.
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| CN109383266B (en) * | 2017-08-07 | 2024-04-19 | 宇通客车股份有限公司 | Planet row hybrid power driving system and vehicle using same |
| CN107650666A (en) * | 2017-08-31 | 2018-02-02 | 上海众联能创新能源科技股份有限公司 | The electric parallel-serial hybrid power system of planetary gear type oil |
| CN108340763B (en) * | 2018-02-09 | 2021-02-09 | 重庆大学 | Hybrid electric vehicle power drive assembly based on double planetary rows |
| CN111038239B (en) * | 2018-10-15 | 2024-04-05 | 宇通客车股份有限公司 | Dual-motor driving system and vehicle |
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| CN204055308U (en) * | 2014-08-08 | 2014-12-31 | 郑州宇通客车股份有限公司 | A kind of planetary series-parallel connection power system and use the vehicle of this power system |
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| CN105109326B (en) * | 2015-08-19 | 2017-06-27 | 南京理工大学 | A kind of hybrid power transmission drive device |
| CN206201953U (en) * | 2016-09-23 | 2017-05-31 | 广州汽车集团股份有限公司 | Double-row planetary gear hybrid power system and motor vehicle driven by mixed power |
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