CN117507786A - Double-motor multi-gear series-parallel hybrid power transmission - Google Patents

Double-motor multi-gear series-parallel hybrid power transmission Download PDF

Info

Publication number
CN117507786A
CN117507786A CN202210457609.6A CN202210457609A CN117507786A CN 117507786 A CN117507786 A CN 117507786A CN 202210457609 A CN202210457609 A CN 202210457609A CN 117507786 A CN117507786 A CN 117507786A
Authority
CN
China
Prior art keywords
gear
synchronizer
motor
engine
hev
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202210457609.6A
Other languages
Chinese (zh)
Inventor
段志辉
杨上东
邢杰
黄以明
陈子豪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xiamen Guochuang Center Advanced Electric Drive Technology Innovation Center
Original Assignee
Xiamen Guochuang Center Advanced Electric Drive Technology Innovation Center
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xiamen Guochuang Center Advanced Electric Drive Technology Innovation Center filed Critical Xiamen Guochuang Center Advanced Electric Drive Technology Innovation Center
Priority to CN202210457609.6A priority Critical patent/CN117507786A/en
Publication of CN117507786A publication Critical patent/CN117507786A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • 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
    • B60K6/44—Series-parallel type
    • B60K6/442—Series-parallel switching type

Abstract

The invention discloses a double-motor multi-gear serial-parallel hybrid power transmission, which comprises an engine, a first motor, a second motor, a parallel shaft gear set and three pairs of synchronizers required by gear shifting; the parallel shaft gear set comprises an input shaft and an output shaft which are arranged in parallel; the engine is connected with an input shaft, and a synchronizer S1 is arranged on the input shaft; the output shaft is provided with a synchronizer S2, a synchronizer S3, a gear G1, a gear G2, a gear G3 and a gear G4. In the hybrid power transmission, an engine has four speed ratios, and the working condition of an HEV (hybrid electric vehicle) can be shifted without power interruption; the two motors are respectively provided with two gears, and the EV working condition can shift gears without power interruption; the two motors can be driven simultaneously under EV working conditions, so that the torque, the power requirement, the cost, the weight and the like of the motors are reduced; the EV and HEV operating conditions can be smoothly switched to each other.

Description

Double-motor multi-gear series-parallel hybrid power transmission
Technical Field
The invention discloses a double-motor multi-gear series-parallel hybrid transmission, which belongs to the technical field of hybrid vehicle system manufacturing according to International Patent Classification (IPC).
Background
Hybrid power is an important technology for energy conservation and emission reduction of automobiles, a hybrid power transmission is one of core technologies in the field, and series-parallel hybrid power is one important technical route, and comprises an engine, a generator, a motor, a locking clutch, a reduction gear and the like; the generator is connected with the engine shaft, the motor is connected with the driving vehicle through the accelerating gear, and the locking clutch can connect the engine shaft with the output shaft. When the clutch is separated, the generator converts the power output by the engine into electric energy, and the electric energy is converted into driving torque by the motor through rectification and inversion to act on wheels so as to realize electric transmission; when the clutch is locked, the output power of the engine is directly transmitted to the driving vehicle through the reduction gear, so that mechanical transmission is realized. The electric power transmission has the advantages that the engine and the wheels are completely decoupled, so that the engine can work under the optimal working condition; the weakness is that the power output by the engine is subjected to energy conversion for several times, the energy is lost, and the transmission efficiency is reduced. The mechanical transmission has the advantages that torque is transmitted through the gears, and the transmission efficiency is high; the weakness is that the engine speed is locked with the wheel speed, the engine working point is determined by the vehicle speed, the best working condition can not be maintained, and the engine efficiency is low. The existing series-parallel hybrid power has a weakness: at low speeds, driven in series, engine torque cannot participate in vehicle acceleration, which is limited.
In order to overcome the weakness of the series-parallel hybrid power system, people begin to develop a multi-gear series-parallel hybrid power system: as in chinese document CN113400923a, a series-parallel hybrid system is disclosed, in which a 2-planetary-gear-train+2 clutch+2 brake is used, and the engine and the motor have four gears, so that the transmission efficiency and the power performance can be improved. However, the system adopts a 2-planetary-gear-row+2-clutch+2-brake as a speed change mechanism, so that the system has complex structure and high cost; the 2 clutch and the 2 brake are arranged, energy is consumed during locking, drag resistance can be generated during separation, energy loss is generated, the efficiency of the whole system is reduced, and the oil consumption of the whole vehicle is increased; these clutches and brakes require hydraulic systems to operate, and require an electric oil pump, a plurality of solenoid valves, and hydraulic lines, which are responsible for construction and are costly. In some serial-parallel system designs, power interruption can occur during gear shifting under EV working conditions, and the comfort is poor.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a double-motor multi-gear series-parallel hybrid transmission, and the electric drive EV working condition can be shifted without power interruption by controlling two motors and a gear engaging mechanism; hybrid drive HEV operating mode: the engine and the motor can alternately drive and shift gears, and the shifting process is smooth; by controlling the engine, the two motors and the gear shifting mechanism, the working conditions of the EV and the HEV can be smoothly switched.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
a dual-motor multi-speed series-parallel hybrid transmission comprising: the gear shifting device comprises an engine, a first motor, a second motor, a parallel shaft gear set and three pairs of synchronizers required by gear shifting;
a parallel shaft gear set comprising an input shaft and an output shaft arranged in parallel;
the engine is connected with an input shaft, and a synchronizer S1 is arranged on the input shaft;
the first motor is directly connected with the gear G2 or/and the gear G4 or is connected with the first transmission unit through the first transmission unit, wherein the first transmission unit comprises two gears, and the two gears are respectively connected with the gear G2 and the gear G4;
the second motor is directly connected with the gear G1 or/and the gear G3 or is connected with the gear G3 through a second transmission unit, and the second transmission unit comprises two gears which are respectively connected with the gear G1 and the gear G3;
the synchronizer S1 acts with the first transmission unit when one side gear is engaged, and acts with the second transmission unit when the other side gear is engaged;
the output shaft is provided with a synchronizer S2, a synchronizer S3, a gear G1, a gear G2, a gear G3 and a gear G4, wherein the gear G2 and the gear G4 are connected with the output shaft through the synchronizer S2, and the gear G2 and the gear G4 are respectively meshed with two gears of the first transmission unit; the gears G1 and G3 are connected with the output shaft through the synchronizer S3, and the gears G1 and G3 are respectively meshed with two gears on the second transmission unit.
Further, the first transmission unit comprises a first hollow shaft, two gears are arranged on the hollow shaft and meshed with the gear G2 and the gear G4 respectively, and the first hollow shaft is connected with the first motor;
the second transmission unit comprises a second hollow shaft, two gears are arranged on the hollow shaft and meshed with the gear G1 and the gear G3 respectively, and the second hollow shaft is connected with a second motor;
the first hollow shaft and the second hollow shaft are sleeved on the input shaft and are positioned at two sides of the synchronizer S1, and when the synchronizer S1 is in gear left, the input shaft is connected with the first hollow shaft; when the synchronizer S1 is engaged to the right side, the input shaft is connected with the second hollow shaft.
Further, the parallel shaft gear set includes an intermediate shaft positioned between the input shaft and the output shaft;
the first transmission unit comprises a first gear and an intermediate hollow shaft, wherein the intermediate hollow shaft is fixedly provided with two gears, one gear on the intermediate hollow shaft is meshed with the first gear, the first motor is connected with the first gear, and the intermediate hollow shaft is sleeved on the intermediate shaft;
the second transmission unit comprises a second gear and two gears arranged on the intermediate shaft, one gear of the intermediate shaft is meshed with the second gear,
the first gear and the second gear are arranged on the input shaft and positioned at two sides of the synchronizer S1, the input shaft is connected with the first gear when the synchronizer S1 is hung on the left side gear, the input shaft is connected with the second gear when the synchronizer S1 is hung on the right side gear,
the output shaft is sequentially provided with a gear G1, a synchronizer S3, a gear G2, a synchronizer S2 and a gear G4, wherein the gear G2 and the gear G4 are respectively meshed with two gears on the middle hollow shaft; the gears G1 and G3 are engaged with two gears on the intermediate shaft, respectively.
The synchronizer S1 or/and the synchronizer S2 or/and the synchronizer S3 in the present invention are replaced by a clutch.
In the hybrid power transmission, the engine has four speed ratios, the working efficiency is improved, and the two motors respectively have two speed ratios, so that larger torque can be output, the high-speed characteristic is improved, and the motor efficiency is improved; the traditional parallel shaft gear speed change mechanism is adopted, so that the technology is simple and mature; only one type of gear shifting mechanism, namely a synchronizer, is used, so that the transmission efficiency is high, the technology is mature, the cost is low, and the cost of a gear shifting operation executing mechanism is low and the energy loss is low; electric EV operating mode: the motor is provided with two gears, and the gear shifting can be carried out without power interruption by controlling the two motors and the gear engaging mechanism; EV operating mode: the two motors can be driven simultaneously, the torque and power requirements of the motors are reduced, and the weight, the volume and the cost can be reduced; hybrid start HEV operating mode: the engine and the motor can alternately drive and shift gears, and the shifting process is smooth; by controlling the engine, the motor G, the motor M, and the gear shifting mechanism, it is possible to achieve a smooth switching of EV and HEV operating conditions from each other.
Drawings
Fig. 1 is a schematic view of a first embodiment of the present invention.
Fig. 2 is a schematic diagram of a second embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
examples: the invention relates to a double-motor multi-gear series-parallel hybrid power transmission, which comprises: the gear shifting device comprises an engine 1, a first motor 2, a second motor 3, a parallel shaft gear set and three pairs of synchronizers required by gear shifting; a parallel shaft gear set comprising an input shaft 4 and an output shaft 5 arranged in parallel; the engine 1 is connected with an input shaft 4, and a synchronizer S1 is arranged on the input shaft 4; the first motor 2 is connected with a first transmission unit, and the transmission unit comprises two gears which are respectively connected with a gear G2 and a gear G4; the second motor 3 is connected with a second transmission unit, and the transmission unit comprises two gears which are respectively connected with the gear G1 and the gear G3; the synchronizer S1 acts with the first transmission unit when one side gear is engaged, and acts with the second transmission unit when the other side gear is engaged; the output shaft 7 is provided with a synchronizer S2, a synchronizer S3, a gear G1, a gear G2, a gear G3 and a gear G4, wherein the gear G2 and the gear G4 are connected with the output shaft through the synchronizer S2, and the gear G2 and the gear G4 are respectively meshed with two gears of the first transmission unit; the gear G1 and the gear G3 are connected with the output shaft through a synchronizer S3, and the gear G1 and the gear G3 are respectively meshed with two gears on the second transmission unit; the engine has four gears G1, G2, G3 and G4 and the second electric machine has two gears G1 and G3. The above is the core foundation of the scheme.
The invention has two embodiments, one is a two-axis parallel power system as in example 1 and the other is a three-axis parallel system as in example 2.
In the two-shaft parallel power system, on the basis of the core, a first transmission unit comprises a first hollow shaft 5, two gears are arranged on the hollow shaft and meshed with a gear G2 and a gear G4 respectively, and the first hollow shaft 5 is connected with a first motor 2; the second transmission unit comprises a second hollow shaft 6, two gears are arranged on the hollow shaft and meshed with the gear G1 and the gear G3 respectively, and the second hollow shaft 6 is connected with the second motor 3; the first hollow shaft 5 and the second hollow shaft 6 are sleeved on the input shaft 4 and are positioned at two sides of the synchronizer S1, and the input shaft is connected with the first hollow shaft when the synchronizer S1 is in gear left; when the synchronizer S1 is engaged to the right side, the input shaft is connected with the second hollow shaft. In the two-shaft parallel power system, the motor can be arranged on the side of the output shaft, for example, the output end of the first motor 2 is directly meshed with the gear G2 or the gear G4 on the output shaft, and the second motor 3 is directly meshed with the gear G1 or the gear G3 on the output shaft, so that other structures are unchanged.
In a triaxial parallel system, on the basis of a core, a parallel shaft gear set comprises an intermediate shaft 8, and the intermediate shaft 8 is positioned between an input shaft 4 and an output shaft 7; the first transmission unit comprises a first gear 10 and a middle hollow shaft 9, wherein the middle hollow shaft 9 is fixedly provided with two gears, one gear on the middle hollow shaft 9 is meshed with the first gear 10, the first motor 2 is connected with the first gear 10, and the middle hollow shaft 9 is sleeved on the middle shaft 8; the second transmission unit comprises a second gear 11 and two gears arranged on an intermediate shaft, one gear of the intermediate shaft 8 is meshed with the second gear 11, the first gear 10 and the second gear 11 are arranged on the input shaft 4 and are positioned on two sides of the synchronizer S1, the input shaft is connected with the first gear when the synchronizer S1 is hung on the left side, the input shaft is connected with the second gear when the synchronizer S1 is hung on the right side, and a gear G1, a synchronizer S3, a gear G2, a synchronizer S2 and a gear G4 are sequentially arranged on the output shaft, wherein the gear G2 and the gear G4 are respectively meshed with the two gears on the intermediate hollow shaft; the gears G1 and G3 are engaged with two gears on the intermediate shaft, respectively.
In the triaxial parallel system, the second motor 3 is connected with the intermediate shaft 8, and can be directly connected or can be meshed and connected through a gear; synchronizer S1 and synchronizer S2 may be aligned front-to-back to reduce the axial length of the transmission.
The hybrid transmission of the invention is characterized by the following:
1: the hybrid power system is constructed, so that various requirements and working conditions can be realized, the components are minimum, the cost of the components is minimum, and the operation is easy. The system can realize working conditions of EV first gear, EV second gear, HEV series connection, HEV first gear, HEV second gear, HEV third gear, HEV fourth gear and the like, and can be smoothly switched mutually. The system is composed of an engine, a motor G, a motor M, a plurality of parallel shaft gear sets and three pairs of synchronizers, at least seven main working conditions are realized, and smooth switching between working conditions can be realized. Only three pairs of synchronizers are provided, the control quantity is small, the operation is simple, the technology is mature, and the cost is low.
2: the two motors can be selectively connected or unlocked with the engine, so that the flexibility of the system is improved, and the technical difficulty and the manufacturing cost are reduced. Any one motor can be selected for driving under the EV working condition, each motor has two speed ratios which are equivalent to 4 EV speed ratios, so that the vehicle has better dynamic property, motor and transmission efficiency and NVH characteristics in a larger speed range; the motor speed ratio can be changed without power interruption; two motors can be driven simultaneously to provide peak torque and power, so that the torque and power requirements of the driving motors are reduced, and the weight, volume and cost are reduced.
3: hybrid transmission control strategy: and smooth working condition switching is realized by utilizing the characteristics of multiple power sources. The engine is a power source, and the Motor is another power source. When a gear is required to be shifted, the Motor is driven by the original gear, and the engine is switched into a new gear; then, the engine is driven by the new gear to complete the gear shift. Or the Motor is driven by the engine through the original gear, and the Motor is switched to enter a new gear; then, the Motor is driven by the new gear, the engine is switched to the new gear, and gear switching is completed.
For clarity of description of the present invention, the first motor 2 will be referred to as motor 2 or motor G, the second motor 3 will be referred to as motor 3 or motor M, the first gear 10 will be referred to as gear 10, and the second gear 11 will be referred to as gear 11, and the following description will be made specifically by means of two embodiments:
example 1: as shown in fig. 1, the dual-motor multi-gear series-parallel hybrid transmission of the present invention, also referred to as a hybrid system, includes: three pairs of synchronizers required by the gear shifting of the engine 1, the motor 2, the motor 3, the parallel shaft gear set; the engine 1 has four gears G1, G2, G3 and G4, the motor 3 has two gears G1 and G3, and the motor 2 has two gears G2 and G4; the three pairs of synchronizers are used for realizing gear switching, the types of gear shifting mechanisms are single, the actuating mechanisms are simple, and the cost is low; the speed change mechanism formed by the parallel shaft gear and the synchronizer has the advantages of mature technology, lower manufacturing cost, high transmission efficiency and less energy loss.
The engine 1 is connected with an input shaft 4, and a synchronizer S1, a hollow shaft 5 and a hollow shaft 6 are arranged on the input shaft 4; the input shaft 4 is connected with the hollow shaft 5 when the synchronizer S1 is engaged on the left side; the synchronizer S1 is engaged on the right, and the input shaft 4 is connected with the hollow shaft 6.
The motor 2 is connected with the hollow shaft 5, and can be connected with a transmission part (not shown) such as a gear; two gears are arranged on the hollow shaft 5 and meshed with the gear G2 and the gear G4 respectively.
The motor 3 is connected with the hollow shaft 6, and can be connected with a transmission part (not shown) such as a gear; two gears are arranged on the hollow shaft 6 and meshed with the gear G1 and the gear G3 respectively.
On the output shaft 7, a synchronizer S2, a synchronizer S3, a gear G1, a gear G2, a gear G3, and a gear G4 are arranged. Wherein two gears are connected with an output shaft 7 through a synchronizer S2 and are respectively meshed with two gears on the hollow shaft 5; the other two gears are connected with the output shaft 7 through the synchronizer S3 and are respectively meshed with two gears on the hollow shaft 6.
When the hybrid power system is applied to various working conditions of a vehicle, the following table 1 is configured:
the following working conditions, wherein EV refers to a vehicle-only driving mode or working condition, HEV refers to a vehicle hybrid driving mode or working condition
1. Vehicle pure electric EV operating mode:
there are several modes of operation for EV operation: the motor 3 independently drives the G1 gear or the G3 gear and has two speed ratios; the motor 2 independently drives the G2 gear or the G4 gear and has two speed ratios; two motors are driven simultaneously, and three combinations exist.
The engine is turned off, the synchronizer S1 is disengaged, the synchronizer S3 is engaged with the gear G1 (or the gear G3), the motor 3 drives the output shaft 7 through the gear pair G1 (or the gear pair G3), which is the EV mode that the motor 3 alone drives, with two gears: g1 and G3.
The engine is turned off, the synchronizer S1 is disengaged, the synchronizer S2 is engaged with the gear G2 (or the gear G4), the motor 2 drives the output shaft 7 through the gear pair G2 (or the gear pair G4), which is an EV mode in which the motor 2 alone drives two gears: g2 and G4.
The engine is closed, the synchronizer S1 is out of gear, the synchronizer S3 is in gear G1 (or gear G3), and the motor 3 drives the output shaft 7 through the gear pair G1 (or the gear pair G3); at the same time, synchronizer S2 is engaged with gear G2 (or gear G4), and motor 2 drives output shaft 7 through gear pair G2 (or gear pair G4), which is a mode in which motor 2 and motor 3 drive EV mode together, with motor 3 engaged with gear G1 and motor 2 engaged with gear G2, motor 3 engaged with gear G3 and motor 2 engaged with gear G4, and so on.
2. EV operating mode powerless interrupt shift:
when the vehicle runs at a low speed, the synchronizer S3 is engaged with the gear G1, the motor 3 drives the output shaft 7 through the gear pair G1, the gear G1 is relatively large, and the motor 3 can generate a very large driving torque on the output shaft 7, so that the vehicle is accelerated; when the vehicle speed is increased, the large speed ratio of the gear G1 enables the motor 3 to rotate at a high speed, so that the problems of motor efficiency reduction, vibration, noise and the like are brought, and the gear is required to be changed, so that the speed ratio is changed; for gear shifting, the motor 2 is synchronized, the synchronizer S2 is engaged with the left side gear, then the motor 2 drives the output shaft 7 through the gear G2, the motor 3 is unloaded and is disengaged from the gear G1, and the system enters the EV working condition G2; then, a gear G3 is engaged; finally, the motor 3 resumes driving, the motor 2 exits driving, the gear G2 is disengaged, and the system enters the gear G3 of the motor 3. In the whole gear shifting process, the driving torque is kept unchanged, and the process is smooth. The motor 3 has two gears, so that good balance can be achieved between acceleration performance and fuel economy, and meanwhile, requirements on torque and rotation speed are reduced, so that cost, weight and NVH (namely Noise, vibration and Harshness acoustic Vibration roughness can be colloquially understood as irregularity) are reduced.
3. EV operating mode switches HEV series operating mode:
the vehicle may smoothly switch from the EV operating condition to the HEV series drive operating condition: EV operating mode: the engine is shut down, the synchronizer S1 is disengaged, the synchronizer S3 is engaged with the gear G1 (or G3), and the motor 3 drives the output shaft 7 through the gear G1 (or the gear G3) and the synchronizer S3. To switch from EV operating conditions to HEV operating conditions, the following steps are implemented: the synchronizer S1 is put into gear on the left side, and the motor 2 drags and starts the engine 1 through the shaft 5, the synchronizer S1 and the input shaft 4; then, the engine enters a working state, outputs power, drives the motor 2 to generate power, supplies power to the motor 3, drives the vehicle by the motor 3, and enters an HEV series driving working condition.
4. The series mode switches the parallel mode:
when the vehicle speed is low, the system HEV is driven in series; as the vehicle speed increases, the system will enter the HEV parallel drive, with the system engaged in first, second, third or fourth gear, respectively, i.e., the engine 1 can be driven directly at four different speed ratios. The working condition efficiency of the engine 1 is better than that of a three-gear series-parallel hybrid power system. The motor 3 has two gears G1 and G3, so that good balance between acceleration performance and fuel economy can be achieved, and meanwhile, the torque and rotating speed requirements are reduced, so that cost, weight and NVH are reduced.
The series operating mode of the HEV can be smoothly switched to a first gear (or a third gear) of the HEV: HEV series mode: the synchronizer S1 is engaged to enable the shaft 5 to be connected with the input shaft 4, and the engine 1 drives the motor 2 to generate power; the synchronizer S2 is shifted off; synchronizer S3 engages G1 (or G3) and motor 3 drives output shaft 7 via S3 and G1. The parallel driving mode is switched from the series driving mode, and the following steps are implemented: the motor 3 continues to drive, and the vehicle is not interrupted by power; the motor 2 drives the engine 1 to adjust the speed, and when the input shaft 4 and the hollow shaft 5 are synchronous with the hollow shaft 6, the synchronizer S1 takes off the left side gear and hangs the right side gear, and the engine 1 is connected with the motor 3; the engine 1 then resumes output torque, driving the output shaft 7 through the synchronizer S1 right side, S3 and gear G1 (or G3), and the system enters HEV first gear (or third gear).
The series operating mode of the HEV can be smoothly switched to the second gear (or the fourth gear) of the HEV: HEV series mode: the synchronizer S1 is engaged to enable the hollow shaft 5 to be connected with the input shaft 4, and the engine 1 drives the motor 2 to generate power; the synchronizer S2 is shifted off; synchronizer S3 engages G1 (or G3) and motor 3 drives output shaft 7 via S3 and G1. The parallel driving mode is switched from the series driving mode, and the following steps are implemented: the motor 3 continues to drive, and the vehicle is not interrupted by power; the motor 2 drives the engine 1 to regulate the speed, when the gear G2 (or the gear G4) is synchronous with the output shaft 7, the synchronizer S2 is engaged, and the engine 1 is connected with the output shaft 7 through the synchronizer S1 and the gear G2 (or the gear G4) to realize direct driving and engage a second gear (or a fourth gear).
5. Under HEV working condition, no power interruption gear shifting is carried out:
the first gear (or third gear) working condition of the HEV can be smoothly switched to the second gear (or fourth gear) of the HEV: unloading the engine 1, and compensating torque increase of the motor 3; the motor 3 continues to drive through the synchronizer S3 and the gear G1 (or G3), and the vehicle is in no power interruption; after the torque of the engine is reduced to zero, the right gear of the synchronizer S1 can be easily removed; then, the left side of the synchronizer S1 is engaged, and the engine 1 is connected with the hollow shaft 5; then, the motor 2 drives the engine 1 to adjust synchronization, so that the gear G2 (or G4) is synchronized with the output shaft 7; then synchronizer S2 is engaged in gear G2 (or G4), engine 1 drives output shaft 7 through input shaft 4, synchronizer S1, hollow shaft 5 and gear G2 (or G4), and engine 1 is engaged in gear two (or gear four).
The second gear working condition of the HEV can be smoothly switched to the third gear of the HEV: an engine 1 and a motor 2; (motor 3 unloaded, S3 right side gear off; motor 3 speed governing to synchronize gear G3 with output shaft 7, then synchronizer S3 shifts gear G3; the engine 1 is unloaded, the motor 3 increases torque and compensates, the motor is continuously driven through the synchronizer S3 and the gear G3, and the vehicle is in no power interruption; after the engine 1 is unloaded, the left side gear of the S2 is removed; then, the motor 2 drives the engine 1 to adjust the speed, so that the input shaft 4 is synchronous with the hollow shaft 5, and the left side gear of the synchronizer S1 is removed and the right side gear of the synchronizer S1 is hung; the engine 1 drives the output shaft 7 through the input shaft 4, the synchronizer S1, the hollow shaft 5, the gear G3 and the synchronizer S3, and the engine 1 realizes three gears.
Example 2: as shown in fig. 2, the dual-motor multi-gear series-parallel hybrid transmission of the invention is also called a hybrid power system, and comprises an engine 1, a motor 2, a motor 3, a parallel shaft gear set and three pairs of synchronizers required by gear shifting; the engine 1 has four gears G1, G2, G3 and G4, and the electric machine 3 has two gears G1 and G3; the three pairs of synchronizers are used for realizing gear switching, the types of gear shifting mechanisms are single, the actuating mechanisms are simple, and the cost is low; the speed change mechanism formed by the parallel shaft gear and the synchronizer has the advantages of mature technology, lower manufacturing cost, high transmission efficiency and less energy loss.
The engine 1 is connected with an input shaft 4, and a gear 10, a gear 11 and a synchronizer S1 are arranged on the input shaft 4; the input shaft 4 is connected to the gear 10 when the synchronizer S1 is hung on the left side, and the input shaft 4 is connected to the gear 11 when the synchronizer S1 is hung on the right side.
The motor 2 is connected with the gear 10, can be directly connected, and can also be connected through gear engagement.
Two gears are fixedly arranged on the middle hollow shaft 9, and one of the gears is meshed with the gear 10; two gears are fixedly arranged on the intermediate shaft 8, one of which is meshed with the gear 11.
The motor 3 is connected to the intermediate shaft 8, either directly or via a gear engagement.
On the output shaft 7, a synchronizer S2, a synchronizer S3, a gear G1, a gear G2, a gear G3, and a gear G4 are arranged. Wherein two gears are connected with the output shaft 7 through a synchronizer S2 and are respectively meshed with two gears on the middle hollow shaft 9; the other two gears are connected to the output shaft 7 via a synchronizer S3 and mesh with two gears on the intermediate shaft 8, respectively.
When the hybrid power system is applied to various working conditions of a vehicle, the following table 2 is configured:
the vehicle can purely drive EV operating conditions: the engine is turned off; the motor 3 is driven using electric power supplied from a battery, and drives wheels through the synchronizer S3 and the gear G1 (or the gear G3). The pure electric driving working condition can shift without power interruption: the motor 2 is synchronized, the right side gear is hung on the S2, then the motor 2 drives wheels, and the motor 3 is unloaded at the same time; then G1 or G3 gear is picked up, and G3 or G1 gear is hung; finally, the motor 3 resumes driving and the motor 2 exits driving. In the whole gear shifting process, the driving torque is kept unchanged, and the process is smooth. The motor 3 has two gears, so that good balance can be achieved between acceleration performance and fuel economy, and meanwhile, the torque and rotating speed requirements are reduced, so that cost, weight and NVH are reduced.
The vehicle may smoothly switch from the EV operating condition to the HEV series drive operating condition: the motor 3 is driven by electric energy provided by a battery, and wheels are driven by the synchronizer S3 and gears G1/G3; the synchronizer S1 is hung on the left side, and the motor 2 drags and starts the engine 1; then, the engine outputs power, the driving motor 2 generates power to supply power to the motor 3, and the system enters into the series driving working condition of the HEV.
When the vehicle speed is low, the system HEV is driven in series; as the vehicle speed increases, the system will enter the HEV parallel drive, with the system engaged in first, second, third or fourth gear, respectively, i.e., the engine 1 can be driven directly at four different speed ratios. The working condition efficiency of the engine 1 is better than that of the series-parallel hybrid power of the first gear, the second gear and the third gear. The motor 3 has two gears G1 and G3, so that good balance between acceleration performance and fuel economy can be achieved, and meanwhile, the torque and rotating speed requirements are reduced, so that cost, weight and NVH are reduced.
The series working condition of the HEV can be smoothly switched to the first gear of the HEV: the torque of the engine 1 is transferred to the motor 3, and the torque tends to zero; the motor 3 continues to drive through S3 and G1, and the vehicle is in no power interruption; the motor 2 drives the engine 1 to adjust the speed, synchronizes with the right side of the synchronizer S1, and then gears on the right side of the synchronizer S1; after the gear is engaged, the engine 1 resumes the output torque, and the system enters the first gear of the HEV by being driven by the right side of the synchronizer S1, the S3 and the gear G1.
The first gear working condition of the HEV can be smoothly switched to the second gear of the HEV: the engine 1 transfers torque to the motor 3, and the torque tends to zero; the motor 3 continues to drive through the synchronizer S3 and the gear G1, and the vehicle is in no power interruption; after the torque of the engine is reduced to zero, the right gear of the synchronizer S1 can be easily removed; then, the motor 2 adjusts the speed, synchronizes with the left side of the synchronizer S1, and then gears on the left side of the synchronizer S1; then, the motor 2 drives the engine 1 to adjust and synchronize, and the right side of the synchronizer S2 is engaged; then, the engine 1 resumes the output torque, the wheels are driven by the synchronizers S1, S2 and the gear G2, and the system enters into the second gear of the HEV; the motor 3 may continue to be driven through the synchronizer S3 and the gear G1.
The second gear working condition of the HEV can be smoothly switched to the third gear of the HEV: the engine 1 and the motor 2 are driven, the motor 3 reduces torque, and the right gear of the S3 is picked; then the motor 3 adjusts the speed to synchronize the left side of the synchronizer S3, and then the left side of the synchronizer S3 is engaged; the engine 1 transfers torque to the motor 3, and the torque tends to zero; the motor 3 continues to drive through the synchronizer S3 and the gear G3, and the vehicle is in no power interruption; after the torque of the engine is reduced to zero, the left gear of the synchronizer S2 can be easily removed; then, the motor 2 drives the engine 1 to adjust the speed, and after synchronizing with the right side of the synchronizer S1, the left side gear of the synchronizer S1 is removed and the right side gear of the synchronizer S1 is hung; after the gear is engaged, the engine 1 resumes the output torque, and the system enters the three gear of the HEV by being driven by the synchronizers S1 and S3 and the gear G3.
The three-gear working condition of the HEV can be smoothly switched to the four-gear working condition of the HEV: the engine 1 transfers torque to the motor 3, and the torque tends to zero; the motor 3 continues to drive through the synchronizer S3 and the gear G3, and the vehicle is in no power interruption; after the torque of the engine 1 is reduced to zero, the right gear of the synchronizer S1 can be easily removed; then, the motor 2 adjusts the speed, synchronizes with the left side of the synchronizer S1, and then gears on the left side of the synchronizer S1; then, the motor 2 drives the engine 1 to adjust and synchronize, and the left side of the synchronizer S2 is engaged; then, the engine 1 resumes the output torque, the wheels are driven by the synchronizers S1, S2 and the gear G4, and the system enters into the second gear of the HEV; the motor 3 may continue to be driven through the synchronizer S3 and the gear G3.
By way of the above two embodiments, the hybrid transmission of the present invention has the following advantages:
1. the invention relates to a double-motor series-parallel hybrid power gearbox with four gears and two gears of a driving motor of an engine.
2. Compared with a series-parallel hybrid power gearbox with three gears or less, the gear of the design is increased, the fuel economy of an engine can be improved, and the acceleration performance of the whole vehicle is enhanced.
3. Compared with other four-gear series-parallel hybrid power gearboxes, 1) the speed change mechanism uses parallel shaft gears, so that the cost is low; 2) Based on the double power sources of the engine and the motor, the gear shifting strategy with alternate driving and gear shifting is adopted, the gear shifting without power interruption is realized, and the smoothness of the gear shifting process is superior to that of the mutual switching of the two clutches; 3) The synchronizer with high service efficiency, low cost and simple operating mechanism of the gear shifting mechanism can realize alternate gear shifting with double power sources, thereby being beneficial to improving the fuel economy of the vehicle and reducing the manufacturing cost; 4) Only three pairs of synchronizers are needed, so that the number of gear shifting executing mechanisms is small, and the cost is reduced; 5) The double-power alternating driving and gear shifting are superior to the double-power alternating driving and gear shifting, the requirement on excessive gear shifting time is reduced, the requirement on a gear shifting executing mechanism is reduced, and the cost is reduced; only the synchronizer is used as a gear shifting mechanism, so that the variety of the gear shifting mechanism is few, and the cost is reduced; 6) Compared with a so-called P1+P3 hybrid power gearbox, the design has the advantages of good power performance, low oil consumption, motor torque, low cost and the like; 7) The mechanism is compact, the axial dimension is short, and the popularization and the application are facilitated.
Example 3: unlike embodiment 1 and embodiment 2, in the scheme, the synchronizer S1 or/and the synchronizer S2 or/and the synchronizer S3 may be replaced by a clutch, such that the synchronizer S1 is replaced by a clutch, and the synchronizer S2 is replaced by a clutch, such as the synchronizer S3 is replaced by a clutch, so that both the two-side and middle gear shifting is realized, and other structures are unchanged and are not described herein.
The above description is illustrative of the embodiments using the present teachings, and is not intended to limit the scope of the present teachings to any particular modification or variation of the present teachings by those skilled in the art.

Claims (10)

1. A dual-motor multi-speed series-parallel hybrid transmission, comprising: the gear shifting device comprises an engine, a first motor, a second motor, a parallel shaft gear set and three pairs of synchronizers required by gear shifting;
a parallel shaft gear set comprising an input shaft and an output shaft arranged in parallel;
the engine is connected with an input shaft, and a synchronizer S1 is arranged on the input shaft;
the first motor is directly connected with the gear G2 or/and the gear G4 or is connected with the first transmission unit through the first transmission unit, wherein the first transmission unit comprises two gears, and the two gears are respectively connected with the gear G2 and the gear G4;
the second motor is directly connected with the gear G1 or/and the gear G3 or is connected with the gear G3 through a second transmission unit, and the second transmission unit comprises two gears which are respectively connected with the gear G1 and the gear G3;
the synchronizer S1 acts with the first transmission unit when one side gear is engaged, and acts with the second transmission unit when the other side gear is engaged;
the output shaft is provided with a synchronizer S2, a synchronizer S3, a gear G1, a gear G2, a gear G3 and a gear G4, wherein the gear G2 and the gear G4 are connected with the output shaft through the synchronizer S2, and the gear G2 and the gear G4 are respectively meshed with two gears of the first transmission unit; the gears G1 and G3 are connected with the output shaft through the synchronizer S3, and the gears G1 and G3 are respectively meshed with two gears on the second transmission unit.
2. The dual-motor multi-speed series-parallel hybrid transmission of claim 1, wherein:
the first transmission unit comprises a first hollow shaft, two gears are arranged on the hollow shaft and meshed with the gear G2 and the gear G4 respectively, and the first hollow shaft is connected with a first motor;
the second transmission unit comprises a second hollow shaft, two gears are arranged on the hollow shaft and meshed with the gear G1 and the gear G3 respectively, and the second hollow shaft is connected with a second motor;
the first hollow shaft and the second hollow shaft are sleeved on the input shaft and are positioned at two sides of the synchronizer S1, and the input shaft is connected with the first hollow shaft when the synchronizer S1 is in gear; when the synchronizer S1 is engaged with the other side, the input shaft is connected with the second hollow shaft.
3. The dual-motor multi-speed series-parallel hybrid transmission of claim 2, wherein: the transmission is configured with a pure electric EV operating unpowered interrupt shift mode: during low-speed running, the synchronizer S3 is engaged with the gear G1, and the second motor drives the output shaft through the gear G1; during gear shifting, the first motor is synchronized, the synchronizer S2 is used for engaging the G2 gear, then the first motor drives the output shaft through the gear G2, the second motor is used for unloading and removing the gear G1, and then the gear G3 is engaged; finally, the second motor resumes driving, the first motor exits driving, the system enters a gear G3 of the second motor, and gear shifting is completed.
4. The dual-motor multi-speed series-parallel hybrid transmission of claim 2, wherein: the transmission is configured to switch the HEV series operating mode from the EV operating mode:
when the EV working condition is met, the engine is shut down, the synchronizer S1 is in gear shifting, the synchronizer S3 is in gear shifting G1 or G3, and the second motor drives the output shaft through the gear shifting G1 or the gear shifting G3 and the synchronizer S3;
the synchronizer S1 is put into gear on the left side, and the first motor drags and starts the engine through the first hollow shaft, the synchronizer S1 and the input shaft; then, the engine enters a working state, outputs power, drives the first motor to generate power, supplies power for the second motor, drives the vehicle, and enables the system to enter an HEV series driving working condition.
5. The dual-motor multi-speed series-parallel hybrid transmission of claim 2, wherein: the transmission is configured to switch the HEV series mode to the parallel mode:
the series working condition of the HEV is switched to first gear or third gear of the HEV: HEV series mode: the synchronizer S1 is engaged to enable the first hollow shaft to be connected with the input shaft, and the engine drives the first motor to generate power; the synchronizer S2 is shifted off; the synchronizer S3 is engaged with the gear G1 or G3, and the second motor drives the output shaft through the synchronizer S3 and the gear G1; switching the parallel drive mode from the series drive mode: the second motor continues to drive, and the vehicle is not interrupted by power; the first motor drives the engine to adjust the speed, and when the input shaft and the first hollow shaft are synchronous with the second hollow shaft, the synchronizer S1 takes off the left side gear and takes on the right side gear, and the engine is connected with the second motor; then, the engine resumes the output torque, and the output shaft is driven by the synchronizer S1 on the right side and the synchronizer S3 and the gear G1 or the gear G3, and the system enters into the first gear or the third gear of the HEV; the series working condition of the HEV can be smoothly switched to the second gear or the fourth gear of the HEV: HEV series mode: the synchronizer S1 is engaged to enable the first hollow shaft to be connected with the input shaft, and the engine drives the first motor to generate power; the synchronizer S2 is shifted off; the synchronizer S3 is used for engaging the gear G1 or the gear G3, and the second motor drives the output shaft through the synchronizer S3 and the gear G1; switching the parallel drive mode from the series drive mode: the second motor continues to drive, and the vehicle is not interrupted by power; the first motor drives the engine to adjust the speed, when the gear G2 or the gear G4 is synchronous with the output shaft, the synchronizer S2 is in gear, the engine is connected with the output shaft through the synchronizer S1, the gear G2 or the gear G4, direct driving is realized, and the system enters the HEV to be in secondary gear or fourth gear.
6. The dual-motor multi-speed series-parallel hybrid transmission of claim 2, wherein: the transmission is configured for powerless interrupt shifting under HEV conditions:
the working condition of first gear or third gear of the HEV is switched to second gear or fourth gear of the HEV: unloading the engine, and compensating torque increase of the second motor; the second motor continues to drive through the synchronizer S3 and the gear G1 or the gear G3, and the vehicle is in no power interruption; after the engine torque is reduced to zero, the right gear of the synchronizer S1 is removed; then, the left side of the synchronizer S1 is engaged, and the engine is connected with the first hollow shaft; then, the first motor drives the engine to adjust synchronization, so that the gear G2 or the gear G4 is synchronous with the output shaft; then the synchronizer S2 is used for engaging the gear G2 or the gear G4, the engine 1 drives the output shaft through the input shaft, the synchronizer S1, the first hollow shaft and the gear G2 or the gear G4, and the engine 1 is used for engaging a second gear or a fourth gear;
the second gear working condition of the HEV is switched to the third gear of the HEV: an engine and a first motor drive; unloading the second motor, and picking up the right gear of the synchronizer S3; the second motor adjusts the speed to synchronize the gear G3 with the output shaft, and then the synchronizer S3 shifts into the gear G3; the engine is unloaded, the second motor increases torque and compensates, the driving is continued through the synchronizer S3 and the gear G3, and the vehicle is in no power interruption; after the engine is unloaded, the left side gear of the synchronizer S2 is removed; then, the first motor drives the engine to adjust the speed, so that the input shaft is synchronous with the first hollow shaft, and the left side gear of the synchronizer S1 is removed and the right side gear of the synchronizer S1 is hung; the engine drives the output shaft through the input shaft, the synchronizer S1, the first hollow shaft 5, the gear G3 and the synchronizer S3, and the engine realizes three gears.
7. The dual-motor multi-speed series-parallel hybrid transmission of claim 1, wherein: the parallel shaft gear set comprises an intermediate shaft, and the intermediate shaft is positioned between the input shaft and the output shaft;
the first transmission unit comprises a first gear and an intermediate hollow shaft, wherein the intermediate hollow shaft is fixedly provided with two gears, one gear on the intermediate hollow shaft is meshed with the first gear, the first motor is connected with the first gear, and the intermediate hollow shaft is sleeved on the intermediate shaft;
the second transmission unit comprises a second gear and two gears arranged on the intermediate shaft, one gear of the intermediate shaft is meshed with the second gear,
the first gear and the second gear are arranged on the input shaft and positioned at two sides of the synchronizer S1, the input shaft is connected with the first gear when the synchronizer S1 is hung on the left side gear, the input shaft is connected with the second gear when the synchronizer S1 is hung on the right side gear,
the output shaft is sequentially provided with a gear G1, a synchronizer S3, a gear G2, a synchronizer S2 and a gear G4, wherein the gear G2 and the gear G4 are respectively meshed with two gears on the middle hollow shaft; the gears G1 and G3 are engaged with two gears on the intermediate shaft, respectively.
8. The two-motor multiple speed series-parallel hybrid transmission according to claim 1 or 2 or 7, characterized in that: the transmission is configured for electric-only EV operating conditions: the engine is turned off; the second motor is driven by electric energy provided by a battery, wheels are driven by the synchronizer S3 and the gear G1 or the gear G3, and the pure electric driving working condition can be shifted without power interruption: the first motor is used for regulating synchronization, the synchronizer S2 is used for engaging a left side gear, then the first motor drives wheels, and meanwhile, the second motor is used for unloading; then G1 or G3 gear is picked up, and G3 or G1 gear is hung; finally, the second motor resumes driving and the first motor exits driving;
the transmission is configured to switch from EV operating conditions to HEV series drive operating conditions: the second motor is driven by electric energy provided by a battery, and wheels are driven through a synchronizer S3 and gears G1/G3; the synchronizer S1 is hung on the left side, and the first motor drags and starts the engine; and then, outputting power by the engine, driving the first motor to generate power, supplying power to the second motor, and enabling the system to enter an HEV series driving working condition.
9. The two-motor multiple speed series-parallel hybrid transmission according to claim 1 or 2 or 7, characterized in that: the transmission is configured for series HEV operating conditions and for each operating condition switching mode of the HEV,
the series operation of the HEV is shifted to the first gear of the HEV: transferring the torque of the engine to a second motor, wherein the torque tends to zero; the second motor continues to drive through the synchronizer S3 and the gear G1, and the vehicle is in no power interruption; the first motor drives the engine to adjust speed, synchronizes with the right side of the synchronizer S1, and then gears on the right side of the synchronizer S1; after gear engagement, the engine resumes output torque, and the system enters HEV first gear through the right side of synchronizer S1, synchronizer S3 and gear G1;
the first gear working condition of the HEV is switched to the second gear of the HEV: the engine transfers torque to the second motor, and the torque tends to zero; the second motor continues to drive through the synchronizer S3 and the gear G1, and the vehicle is in no power interruption; after the engine torque is reduced to zero, the right gear of the synchronizer S1 is removed; then, the first motor adjusts the speed, synchronizes with the left side of the synchronizer S1, and then shifts into gear on the left side of the synchronizer S1; then, the first motor drives the engine to adjust and synchronize, and the right side of the synchronizer S2 is engaged; then, the engine recovers output torque, wheels are driven through a synchronizer S1, a synchronizer S2 and a gear G2, and the system enters into an HEV second gear; the second motor may continue to drive through synchronizer S3 and gear G1;
the second gear working condition of the HEV is switched to the third gear of the HEV: the engine and the first motor are driven, the second motor reduces torque, and the right gear of the synchronizer S3 is disengaged; then the second motor adjusts the speed to synchronize the left side of the synchronizer S3, and then the left side of the synchronizer S3 is engaged; the engine transfers torque to the second motor, and the torque tends to zero; the second motor continues to drive through the synchronizer S3 and the gear G3, and the vehicle is in no power interruption; after the engine torque is reduced to zero, the left gear of the synchronizer S2 is removed; then, the first motor drives the engine to adjust the speed, and after synchronizing with the right side of the synchronizer S1, the left side gear of the synchronizer S1 is removed and the right side gear of the synchronizer S1 is hung; after gear engagement, the engine resumes output torque, and the system enters three gear of HEV through driving of synchronizers S1 and S3 and gear G3;
the three-gear working condition of the HEV is switched to the four-gear working condition of the HEV: the engine transfers torque to the second motor, and the torque tends to zero; the second motor continues to drive through the synchronizer S3 and the gear G3, and the vehicle is in no power interruption; after the torque of the engine is reduced to zero, the right gear of the synchronizer S1 can be easily removed; then, the first motor adjusts the speed, synchronizes with the left side of the synchronizer S1, and then shifts into gear on the left side of the synchronizer S1; then, the first motor drives the engine to adjust and synchronize, and the left side of the synchronizer S2 is engaged; then, the engine resumes the output torque, the wheels are driven by the synchronizers S1 and S2 and the gear G4, and the system enters into the second gear of the HEV; the second motor may continue to drive through synchronizer S3 and gear G3.
10. The two-motor multiple speed series-parallel hybrid transmission according to claim 1 or 2 or 7, characterized in that: synchronizer S1 or/and synchronizer S2 or/and synchronizer S3 is replaced by a clutch.
CN202210457609.6A 2022-04-28 2022-04-28 Double-motor multi-gear series-parallel hybrid power transmission Pending CN117507786A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210457609.6A CN117507786A (en) 2022-04-28 2022-04-28 Double-motor multi-gear series-parallel hybrid power transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210457609.6A CN117507786A (en) 2022-04-28 2022-04-28 Double-motor multi-gear series-parallel hybrid power transmission

Publications (1)

Publication Number Publication Date
CN117507786A true CN117507786A (en) 2024-02-06

Family

ID=89753597

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210457609.6A Pending CN117507786A (en) 2022-04-28 2022-04-28 Double-motor multi-gear series-parallel hybrid power transmission

Country Status (1)

Country Link
CN (1) CN117507786A (en)

Similar Documents

Publication Publication Date Title
CN110525191B (en) Hybrid system for vehicle and control method thereof
JP4205878B2 (en) Power transmission device for hybrid vehicle and control method thereof
CN108909426B (en) Double-motor coupling planetary gear type two-gear variable speed drive axle
CN107225959B (en) One kind seven keeps off mixed power automobile driving system
CN108116218B (en) Multi-gear series-parallel driving system based on planetary gear train
CN106609815B (en) Plug-in type multi-gear hybrid transmission
CN111976463A (en) Hybrid power vehicle driving system capable of realizing single-motor two-gear driving
CN112780734B (en) Hybrid transmission structure and vehicle
CN114407637B (en) Power transmission system and vehicle
CN107364330A (en) A kind of single output seven grades of mixed power automobile driving systems of spindle-type
WO2019206227A1 (en) Design method and control strategy for dual-power hybrid system
CN217705473U (en) Hybrid power transmission
CN217415460U (en) Variable speed transmission system of hybrid electric vehicle
CN219236751U (en) Hybrid power speed change system and vehicle
CN217969233U (en) Multi-gear hybrid electric vehicle variable speed transmission system
CN114811036B (en) Multi-mode double-motor two-gear gearbox for electric automobile
CN113335056B (en) Hybrid electric vehicle speed change system and method and vehicle
CN116552229A (en) Multi-gear hybrid electric vehicle variable speed transmission system
CN117507786A (en) Double-motor multi-gear series-parallel hybrid power transmission
CN212022289U (en) Dual-motor dual-clutch hybrid variable-speed transmission mechanism for vehicle
CN113942383A (en) Multi-gear dual-motor hybrid electric vehicle and transmission system thereof
CN210212009U (en) Transmission for dual-motor hybrid power
CN115214340A (en) Hybrid power driving system and automobile
CN108859730B (en) Multi-clutch unpowered interruption gear shifting hybrid power device and working method thereof
CN113602076A (en) Power system of vehicle, control method of power system, and vehicle

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination