CN108859729B - Multimode coupling power transmission system of single-motor hybrid electric vehicle - Google Patents
Multimode coupling power transmission system of single-motor hybrid electric vehicle Download PDFInfo
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- CN108859729B CN108859729B CN201810689364.3A CN201810689364A CN108859729B CN 108859729 B CN108859729 B CN 108859729B CN 201810689364 A CN201810689364 A CN 201810689364A CN 108859729 B CN108859729 B CN 108859729B
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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
- B60K6/22—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
- B60K6/38—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 driveline clutches
Abstract
The invention relates to a multimode coupling power transmission system of a single-motor hybrid electric vehicle, belonging to the technical field of new energy vehicle power assembly components. The invention realizes the coupling of the rotating speed of the motor and the engine and the torque of the motor and the engine by controlling the engagement of the two clutches and the two brakes to change the coupling mode of the motor and the engine, solves the problem of low load efficiency of the engine and reduces the conversion efficiency loss of a system path.
Description
Technical Field
The invention belongs to the technical field of new energy automobile power assembly components, relates to a driving and braking device of an electric-hydraulic hybrid power system, and particularly relates to a single-motor hybrid power automobile multimode coupling power transmission system.
Background
The new energy automobile becomes an important direction for the development of the automobile at present due to the advantages of low consumption, low pollution and the like. The defects that the pure electric vehicle is limited by the technical bottleneck of the battery, the endurance mileage is short, the vehicle manufacturing cost is high and the like are the main reasons that the pure electric vehicle cannot be widely applied. And the hybrid electric vehicle is used as a transition vehicle type of the traditional fuel oil vehicle and the pure electric vehicle, and has partial advantages of the traditional fuel oil vehicle and the pure electric vehicle. Compared with the traditional fuel automobile, the fuel economy of the hybrid electric automobile is remarkably improved, the pollution emission is remarkably reduced, and mainstream automobile manufacturers research, develop and manufacture the hybrid electric automobile.
In the existing hybrid power system, a single motor and an engine are used as power sources, the problems of low efficiency and the like of the engine under low load exist, and the energy-saving effect is relatively limited. The hybrid power system with the double motors and the engine as power sources has the problems of multiple power sources, high cost, complex control and the like, and is inconvenient for practical application.
Chinese patent No. 201720789572.1 provides a hybrid coupling system for an automobile, which includes at least two clutches and a transmission device having the same number of clutches. Smooth gear shifting can be realized by closing different clutches, and the switching between the electric mode and the hybrid mode can be realized by controlling the disconnection of the clutches. The scheme has compact structural design and simple and quick gear shifting process; however, the engine rotating speed decoupling is not realized in the scheme, and double motors are adopted, so that a plurality of power sources are provided, and the cost is high.
Chinese patent application No. CN201711127609.5 provides a hybrid coupling system for an automobile, which includes a primary shaft, a secondary shaft, a main reducer, a clutch, an engine, and a motor; the engine is coupled to a shaft by a clutch. The structure is simple, various torque coupling modes can be realized, and oil consumption and emission are reduced to a certain extent. However, when the system is under low load, the working range of the engine cannot be adjusted by regulating the speed of the motor, so that the efficiency of the engine is low, and the economic performance of the whole system is affected.
Disclosure of Invention
In view of the above, the present invention provides a multimode coupling power transmission system for a single-motor hybrid vehicle, which can improve the efficiency of the engine at low load and the energy conversion utilization rate of the system path, and improve the economy of the hybrid system.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a multimode coupling power transmission system of a single-motor hybrid electric vehicle, which comprises an engine, a first planetary gear mechanism, a second planetary gear mechanism, a motor, a main reducer and a differential mechanism assembly, wherein the first planetary gear mechanism consists of a first gear ring, a first planet wheel, a first planet carrier and a first sun gear; the output shaft of the motor is in transmission connection with the first planet carrier; one end of a first sun wheel shaft arranged on the first sun wheel is in transmission connection with the main speed reducer and the differential mechanism assembly, and the other end of the first sun wheel shaft is in transmission connection with the second planet carrier; one end of a second sun wheel shaft arranged on the second sun wheel is in transmission connection with the first gear ring, and the other end of the second sun wheel shaft is connected with the third transmission shaft through a second clutch; the second gear ring is in transmission connection with a first transmission shaft, the first transmission shaft is connected with a second transmission shaft through a first clutch, and a first brake is arranged on the first transmission shaft; and a second brake is arranged on the second sun wheel shaft.
Further, a ninth gear, a fifth gear and a sixth gear are coaxially arranged on the first gear ring, the second gear ring and the second planet carrier respectively; a tenth gear is arranged at one end of the first sun gear shaft, which is in transmission connection with the main speed reducer and the differential mechanism assembly, and a seventh gear in meshing transmission with the sixth gear is arranged at one end of the first sun gear shaft, which is in transmission connection with the second planet carrier; an eighth gear in meshing transmission with the ninth gear is arranged at one end, in transmission connection with the first gear ring, of the second sun gear shaft; a fourth gear in meshing transmission with the fifth gear is arranged at one end of the first transmission shaft in transmission connection with the second gear ring; the engine output is equipped with first gear, the one end that the second transmission shaft deviates from first clutch is equipped with the second gear with first gear meshing transmission, the one end that the third transmission shaft deviates from the second clutch is equipped with the third gear with first gear meshing transmission.
Furthermore, the tenth gear, the motor, the first sun gear, the ninth gear and the seventh gear are coaxially arranged; the eighth gear, the sixth gear, the second sun gear, the fifth gear and the third gear are coaxially arranged.
Further, the first gear ring and the ninth gear, the first sun gear and the first sun gear shaft, the second sun gear and the second sun gear shaft, the second planet carrier and the sixth gear, the second gear ring and the fifth gear, the second gear and the second transmission shaft, the third gear and the third transmission shaft, and the fourth gear and the first transmission shaft are respectively of an integrated structure.
Further, the motor is electrically connected with a power battery through an inverter, and the power battery is an electric vehicle storage battery.
Furthermore, the locking part of the first brake is connected with the first transmission shaft through a spline; and the locking part of the second brake is connected with the second sun gear shaft through a spline.
Compared with the prior art, the invention has the remarkable advantages that: the invention realizes the coupling of the rotating speed of the motor and the engine and the torque of the motor and the engine by controlling the connection of the two clutches and the two brakes to change the coupling mode of the motor and the engine, improves the acceleration performance of the system, solves the problem of low load efficiency of the engine, and reduces the path conversion efficiency loss of the system by adopting a single-motor hybrid power system.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a multi-mode coupling power transmission system of a single motor hybrid electric vehicle according to the present invention;
FIG. 2 is a schematic energy flow diagram for a speed coupled mode of operation;
FIG. 3 is a schematic energy flow diagram for a torque-coupled mode of operation;
FIG. 4 is a schematic energy flow diagram of the EV1 mode of operation;
FIG. 5 is a schematic energy flow diagram of the EV2 mode of operation;
reference numerals: the power system comprises a power battery 1, an inverter 2, a first gear ring 3, an eighth gear 4, a sixth gear 5, a second planet carrier 6, a second gear ring 7, a fourth gear 8, a first transmission shaft 9, a first brake 10, a first clutch 11, a second transmission shaft 12, a second gear 13, a first gear 14, an engine 15, a third gear 16, a third transmission shaft 17, a second clutch 18, a second brake 19, a second sun gear shaft 20, a fifth gear 21, a second sun gear 22, a second planet gear 23, a seventh gear 24, a ninth gear 25, a first planet gear 26, a first planet carrier 27, a first sun gear 28, a first sun gear shaft 29, a tenth gear 30, a main reducer and differential assembly 31 and a motor 32.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings; it should be understood that the preferred embodiments are illustrative of the invention only and are not limiting upon the scope of the invention.
The present implementation is basically as shown in fig. 1, the multimode coupling power transmission system of the single motor hybrid electric vehicle comprises an engine 15, a first planetary gear mechanism, a second planetary gear mechanism, a first brake 10, a second brake 19, a power battery 1, a motor 32, a main reducer and a differential assembly 31, wherein the first planetary gear mechanism is composed of a first ring gear 3, a first planet gear 26, a first planet carrier 27 and a first sun gear 28, the second planetary gear mechanism is composed of a second ring gear 7, a second planet gear 23, a second planet carrier 6 and a second sun gear 22, the engine 15 is respectively connected with a second gear 13 and a third gear 15 through a first gear 14, the second gear is connected with a fourth gear 8 through a first clutch 11, the second ring gear 7 is meshed with the fourth gear 8 through a fifth gear 21, the second planet carrier 6 is meshed with a seventh gear 24 through a sixth gear 5, one end of the first sun gear 28 is connected with the seventh gear 24 through a first sun gear shaft 29, the other end is connected with a tenth gear 30 through the first sun gear shaft, and the tenth gear is connected with a main speed reducer and differential assembly 31; the motor 32 is electrically connected with the power battery 1 through the inverter 4, an output shaft of the motor is connected with the first planet carrier 27, the first gear ring 3 is connected with the eighth gear 4 through the ninth gear 25, the eighth gear is connected with the second sun gear 22 through the second sun gear shaft 20, and the second sun gear 22 is connected with the third gear 16 through the second clutch 18; a first brake 10 is arranged on the first transmission shaft 9 and between the fourth gear and the first clutch 11; a second brake 19 is provided on the second sun gear shaft 20 between the second sun gear 22 and the second clutch 18. By adopting the scheme, the invention realizes the coupling of the rotating speed of the motor and the engine and the torque of the motor and the engine by controlling the engagement of the two clutches and the two brakes to change the coupling mode of the motor and the engine, improves the acceleration performance of the system, solves the problem of low load efficiency of the engine, and reduces the path conversion efficiency loss of the system by adopting a single-motor hybrid power system.
In this embodiment, the locking portion of the first brake 10 is connected to the first transmission shaft 9 via a spline (not shown), and the fixed portion is connected to the planetary gear mechanism housing via a flange (not shown); the locking portion of the second brake 19 is connected to the second sun gear shaft 20 via a spline (not shown), and the fixed portion is connected to the planetary gear mechanism housing via a flange (not shown).
The tenth gear 30, the motor 32, the first sun gear 28, the ninth gear 25 and the seventh gear 24 are coaxially arranged, and the eighth gear 4, the sixth gear 5, the second sun gear 22, the fifth gear 21 and the third gear 16 are coaxially arranged; the first ring gear 3 and the second sun gear 22 realize constant-speed gear transmission through the ninth gear 25 and the eighth gear 4, the first sun gear and the second planet carrier realize constant-speed gear transmission through the sixth gear 5 and the seventh gear 24, and the fourth gear 8 and the fifth gear 21 realize constant-speed gear transmission. The first gear 14 is in constant-speed gear transmission with the second gear 13 and the third gear 16, respectively.
The power battery in the embodiment is an electric vehicle storage battery, such as a lead-acid storage battery.
In the embodiment, the first gear ring 3 and the ninth gear 25, the first sun gear 28 and the first sun gear shaft 29, the second sun gear 22 and the second sun gear shaft 20, the second planet carrier 6 and the sixth gear 5, the second gear ring 7 and the fifth gear 21, the second gear 13 and the second transmission shaft 12, the third gear 16 and the third transmission shaft 17, and the fourth gear 8 and the first transmission shaft 9 are respectively of an integrated structure, so that the assembly is convenient, and the structure is stable and reliable.
2-5, the multimode coupling power transmission system of the single-motor electric vehicle has 4 working modes, and can realize different driving forms of the motor, the engine is coupled with the motor in rotating speed and torque, and the working state of the executing mechanism in each working mode is shown in table 1, wherein C1 is the first clutch 11, C2 is the second clutch 18, and B1 is the first brake 10; b2 is a second brake 19; the specific modes are detailed as follows:
table 1 operating mode executive component attached table
(1) Rotating speed coupling mode: namely a motor and engine rotating speed coupling common driving mode; both the motor 32 and the engine 15 are in a driving state. The first clutch 11 is engaged and the second clutch 18, the first brake 10 and the second brake 19 are disengaged. The first clutch 11 connects the second transmission shaft 12 and the first transmission shaft 9, and the power output by the motor 32 is divided into two paths at the first planetary gear 26, wherein the first path is: a first planet wheel 26, a first sun wheel 28, a first sun wheel shaft 29. The second path is the first planet wheel 26, the first ring gear 3, the ninth gear 25, the eighth gear 4, the second sun gear 22, the second planet wheel 23. At the second planet wheels 23, the power of the electric machine 32 will be coupled with the power of the engine 15. The power transmission path of the engine 15 is: the first gear 14, the second gear 13, the second transmission shaft 12, the first clutch 11, the first transmission shaft 9, the fourth gear 8, the fifth gear 21, the second ring gear 7 and the second planet gear 23. After the power of the second path of the motor 32 and the power of the engine 15 are merged at the second planet wheel 23, the common transmission path is as follows: a second planet wheel 23, a second planet carrier 6, a sixth gear 5, a seventh gear 24, a first sun wheel shaft 29. At the first sun gear shaft, the three paths of power will be combined together and then transmitted together through the tenth gear 30 to the final drive and differential assembly 31. The motor 32 is coupled with the rotating speed of the engine 15 to realize the speed regulation of the engine, the working point of the engine 15 is regulated to a high-efficiency area, the fuel economy is obviously improved, and the pollution is reduced. The energy flow path through the system in the tacho coupled drive mode is shown in figure 2.
(2) Torque coupling mode: namely a motor and engine rotating speed coupling common driving mode; both the motor 32 and the engine 15 are in a driving state. The second clutch 18 and the first brake 10 are engaged, the first clutch 11 and the second brake 19 are disengaged, the first clutch 11 connects the third transmission shaft 17 with the second sun gear shaft 20, the first brake 10 locks the fourth gear 8 by braking the first transmission shaft 9, and the fourth gear 8 locks the second ring gear 7 by the fifth gear 21. The power output from the motor 32 passes through the first carrier 27, the first planetary gear 26, and is split into two paths at the first planetary gear 26. The first path is: a first planet wheel 26, a first sun wheel 28, a first sun wheel shaft 29. The second path is the first planet gear 26, the first ring gear 3, the ninth gear 25, the eighth gear 4, the second sun gear 22, the second sun gear shaft 20. At the second sun gear shaft 20, the power of the electric machine 32 will be coupled with the power of the engine 15. The power transmission path of the engine 15 is: a first gear 14, a third gear 16, a second clutch 18, a second sun gear shaft 20. After the power of the second path of the motor 32 and the power of the engine 15 are combined at the second sun gear shaft 20, the common transmission path is: a second sun gear shaft 20, a second planet wheel 23, a second planet carrier 6, a sixth gear 5, a seventh gear 24, a first sun gear shaft 29. At the first sun gear shaft 29, the three paths of power will be combined and transmitted together through the tenth gear 30 to the final drive and differential assembly 31. The torque coupling of the motor 32 and the engine 15 realizes the engine torque conversion, the working point of the engine 15 is adjusted to a high-efficiency area, the fuel economy is obviously improved, and the pollution is reduced. The energy flow path of the system in the torque-coupled drive mode is shown in FIG. 3.
(3) EV1 mode: namely a motor individual driving mode; the motor 32 is in a driving state, the first brake 10 is engaged, and the first clutch 11, the second clutch 18, and the second brake 19 are disengaged. The first brake 10 locks the fourth gear 8 by braking the first transmission shaft 9, and the fourth gear 8 locks the second ring gear 7 by braking the fifth gear 21. The power output from the motor 32 passes through the first carrier 27, the first planetary gear 26, and is split into two paths at the first planetary gear 26. The first path is: a first planet wheel 26, a first sun wheel 28, a first sun wheel shaft 29. The power of the two paths, the first planet wheel 26, the first ring gear 3, the ninth gear 25, the eighth gear 4, the second sun gear 22, the second sun gear shaft 20, the second planet wheel 23, the second planet carrier 6, the sixth gear 5, the seventh gear 24, the first sun gear shaft 29, will be merged at the first sun gear shaft 29. At the first sun gear shaft 29, the power from the two paths will combine and be transmitted together to the final drive and differential assembly 31 via tenth gear 30. In EV1 mode, the energy flow path of the system is shown in FIG. 4.
(4) EV2 mode: namely a motor individual driving mode; the motor 32 is in a driving state, the second brake 19 is engaged, and the first clutch 11, the second clutch 18, and the first brake 10 are disengaged. The second brake 19 locks the eighth gear 4 by braking the second sun gear shaft 20, and the eighth gear 4 locks the first ring gear 3 by the ninth gear 25. The power transmission path output by the motor 32 is: a first carrier 27, a first planet gear 26, a first sun gear 28, a first sun gear shaft 29, a tenth gear 30, a final drive and differential assembly 31. In EV1 mode, the energy flow path of the system is shown in FIG. 5.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (6)
1. A multimode coupling power transmission system of a single-motor hybrid electric vehicle comprises an engine (15), a first planetary gear mechanism, a second planetary gear mechanism, a motor (32), a main reducer and a differential assembly (31), wherein the first planetary gear mechanism consists of a first gear ring (3), a first planetary gear (26), a first planet carrier (27) and a first sun gear (28), the second planetary gear mechanism consists of a second gear ring (7), a second planetary gear (23), a second planet carrier (6) and a second sun gear (22), and is characterized in that an output shaft of the engine is respectively connected with a second transmission shaft (12) and a third transmission shaft (17) in a transmission way; the output shaft of the motor is in transmission connection with the first planet carrier; one end of a first sun wheel shaft (29) arranged on the first sun wheel is in transmission connection with the main speed reducer and the differential mechanism assembly, and the other end of the first sun wheel shaft is in transmission connection with the second planet carrier; one end of a second sun wheel shaft (20) arranged on the second sun wheel is in transmission connection with the first gear ring, and the other end of the second sun wheel shaft is connected with a third transmission shaft through a second clutch (18); the second gear ring is in transmission connection with a first transmission shaft (9), the first transmission shaft is connected with the second transmission shaft through a first clutch (11), and a first brake (10) is arranged on the first transmission shaft; a second brake (19) is arranged on the second sun gear shaft.
2. The multimode coupled power transmission system of the single-motor hybrid vehicle as claimed in claim 1, characterized in that a ninth gear (25), a fifth gear (21) and a sixth gear (5) are coaxially arranged on the first gear ring, the second gear ring and the second planet carrier respectively; a tenth gear (30) is arranged at one end of the first sun gear shaft (29) in transmission connection with the main speed reducer and the differential assembly, and a seventh gear (24) in meshing transmission with the sixth gear is arranged at one end of the first sun gear shaft in transmission connection with the second planet carrier; an eighth gear (4) in meshing transmission with the ninth gear is arranged at one end, in transmission connection with the first gear ring, of the second sun gear shaft (20); a fourth gear (8) in meshing transmission with the fifth gear is arranged at one end of the first transmission shaft, which is in transmission connection with the second gear ring; the engine output is equipped with first gear (14), the one end that the second transmission shaft deviates from first clutch is equipped with second gear (13) with first gear meshing transmission, the one end that the third transmission shaft deviates from the second clutch is equipped with third gear (16) with first gear meshing transmission.
3. The multimode coupled power transmission system of a single motor hybrid vehicle of claim 2, wherein the tenth gear, the motor, the first sun gear, the ninth gear and the seventh gear are coaxially arranged; the eighth gear, the sixth gear, the second sun gear, the fifth gear and the third gear are coaxially arranged.
4. The multimode coupled power transmission system of the single-motor hybrid vehicle as claimed in claim 2, wherein the first gear ring and the ninth gear, the first sun gear and the first sun gear shaft, the second sun gear and the second sun gear shaft, the second planet carrier and the sixth gear, the second gear ring and the fifth gear, the second gear and the second transmission shaft, the third gear and the third transmission shaft, and the fourth gear and the first transmission shaft are respectively of an integrated structure.
5. The multimode coupled power transmission system of the single-motor hybrid electric vehicle according to claim 1, characterized in that the motor is electrically connected with a power battery (1) through an inverter (2), and the power battery is an electric vehicle battery.
6. The multimode coupled power transmission system of a single motor hybrid vehicle of claim 1, wherein the locking portion of the first brake is connected to the first transmission shaft by a spline; and the locking part of the second brake is connected with the second sun gear shaft through a spline.
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| CN201810689364.3A CN108859729B (en) | 2018-06-28 | 2018-06-28 | Multimode coupling power transmission system of single-motor hybrid electric vehicle |
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| CN201810689364.3A CN108859729B (en) | 2018-06-28 | 2018-06-28 | Multimode coupling power transmission system of single-motor hybrid electric vehicle |
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