CN114604075B - Heavy-duty truck hybrid system with combined power taking and limp home functions - Google Patents

Heavy-duty truck hybrid system with combined power taking and limp home functions Download PDF

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Publication number
CN114604075B
CN114604075B CN202210300101.5A CN202210300101A CN114604075B CN 114604075 B CN114604075 B CN 114604075B CN 202210300101 A CN202210300101 A CN 202210300101A CN 114604075 B CN114604075 B CN 114604075B
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China
Prior art keywords
gear
shaft
transmission gear
transmission
power
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CN202210300101.5A
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Chinese (zh)
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CN114604075A (en
Inventor
甄天辉
胡凯
任福臣
张永刚
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China National Heavy Duty Truck Group Jinan Power Co Ltd
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China National Heavy Duty Truck Group Jinan Power Co Ltd
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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
    • 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
    • B60K25/00—Auxiliary drives
    • B60K25/02—Auxiliary drives directly from an engine shaft
    • 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
    • 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
    • B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
    • 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
    • B60K6/50—Architecture of the driveline characterised by arrangement or kind of transmission units
    • B60K6/54—Transmission for changing ratio
    • B60K6/543—Transmission for changing ratio the transmission being a continuously variable transmission
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/50—Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Structure Of Transmissions (AREA)

Abstract

The invention discloses a heavy truck mixing system with a combined power taking and limp home function, which belongs to the technical field of heavy truck transmission systems, wherein an engine is connected with a rear planet carrier through a central shaft; the rear sun gear is connected with an inner hollow shaft connected with a generator; the front sun gear is connected with an outer hollow shaft connected with a driving motor; the transfer shaft is connected with the central shaft, is provided with a transfer shaft gear hub, and is rotatably provided with a transfer shaft rear gear and a transfer shaft rear gear hub; the power takeoff is connected with the power takeoff shaft gear hub; a sliding sleeve locking device and a composite sliding sleeve are arranged on the shell. The generator and the engine regulate the speed of the rear sun gear and the rear planet carrier, realize stepless speed change, decoupling of the rotating speed of the engine and the speed of the vehicle, and adjust the sliding sleeve locking device to realize various mode switching; the torque compensation of the generator and the engine realizes that the output power is not interrupted in gear shifting; the composite sliding sleeve realizes limp home, driving motor power take-off and engine power take-off, and the full working condition of engine power is covered when an electric appliance fails, so that the requirement of heavy truck complex working conditions is met.

Description

Heavy-duty truck hybrid system with combined power taking and limp home functions
Technical Field
The invention belongs to the technical field of heavy truck transmission systems, and particularly relates to a heavy truck hybrid system with composite power taking and limp home functions.
Background
The new energy automobile is an automobile which adopts unconventional automobile fuel as a power source (or adopts conventional automobile fuel and a novel automobile-mounted power device) and integrates the advanced technology in the aspects of power control and driving of the automobile, and the formed technical principle is advanced, and the automobile has a new technology and a new structure.
New energy vehicles include four large types of Hybrid Electric Vehicles (HEV), pure electric vehicles (BEV, including solar vehicles), fuel Cell Electric Vehicles (FCEV), other new energy vehicles (e.g., super capacitors, efficient energy storage such as flywheels), and the like. Unconventional automotive fuels refer to fuels other than gasoline, diesel.
In the field of heavy trucks, hybrid systems have a large development space. At present, a P2 parallel connection structure is generally adopted in a heavy truck hybrid system, and a gearbox adopted in the structure is basically consistent with a traditional energy gearbox in structure, so that the problems of gear shifting power interruption, difficult axial arrangement, incapability of decoupling of engine speed and vehicle speed and the like exist. The power split type mixed-motion structure adopted in the field of passenger cars can realize stepless speed regulation and no power interruption during driving, but has the advantages of simple structure, small transmission torque and incapability of being well suitable for the field of heavy trucks with more complex working conditions.
On the other hand, the heavy engineering vehicle is required to be additionally provided with a power takeoff due to the function, and the engine and the motor cannot work simultaneously due to different working modes of the hybrid system under different working conditions, so that the feasibility of taking power of the engine and the motor cannot be guaranteed. And when an electrical failure occurs in the current double-motor power split type hybrid architecture, the vehicle cannot be normally driven by an engine because the vehicle does not have a multi-gear driven limp home module, and the use requirement of the complex working condition of the heavy vehicle cannot be met.
At present, no complete heavy vehicle mixed-motion system exists, and the requirements that the motor and the engine can take power under different working modes and the engine can still normally drive the vehicle when an electric appliance fails can be met.
Disclosure of Invention
In order to solve the problems, the invention provides a heavy truck hybrid system with a composite power taking and limp home function, wherein the motor and the engine can take power in different working modes, and the engine can still normally drive the vehicle to run when an electric appliance is in failure, so that the use requirement of the heavy vehicle under the complex working condition is met.
The invention is realized by the following technical scheme:
A heavy truck mixing system with combined power taking and limp home functions comprises a shell, a generator, a driving motor, an engine, an axle, a double-planet-row power coupling mechanism, a transfer shaft and a power takeoff;
the double-planet-row power coupling mechanism comprises a front planet-row power coupling mechanism and a rear planet-row power coupling mechanism, the outer rings of the planetary gears of the two are meshed with a gear ring, and the gear ring is in transmission connection with an axle;
the engine is connected with a rear planet carrier of the rear planet row power coupling mechanism through a central shaft; the rear sun gear of the rear planet row power coupling mechanism is connected with an inner hollow shaft, and the generator is in transmission connection with the inner hollow shaft; the front sun gear of the front planetary gear power coupling mechanism is connected with an outer hollow shaft, and the driving motor is in transmission connection with the outer hollow shaft through a driving motor gearbox system;
The transfer shaft is in transmission connection with the central shaft, a transfer shaft gear hub is arranged on the transfer shaft, a transfer shaft rear gear meshed with a gear in the driving motor gearbox system is rotatably arranged on the transfer shaft, and a transfer shaft rear gear hub is connected to the transfer shaft rear gear;
The power takeoff is connected with a power takeoff gear hub through a power takeoff shaft;
The shell is provided with a sliding sleeve locking device capable of locking the central shaft and the inner hollow shaft respectively and a composite sliding sleeve capable of connecting the gear tooth hub behind the transfer shaft, the gear tooth hub of the transfer shaft and the gear tooth hub of the power take-off shaft in pairs respectively.
A further development of the invention provides that the central shaft, the inner hollow shaft and the outer hollow shaft are arranged coaxially from inside to outside.
The invention further improves that the driving motor gearbox system comprises a fifth transmission gear which is connected and installed with the output shaft of the driving motor, a sixth transmission gear, a seventh transmission gear and an eighth transmission gear which are connected and installed through a connecting shaft; the fifth transmission gear is meshed with the sixth transmission gear; the outer hollow shaft is rotatably provided with a second transmission gear and a first transmission gear which are respectively meshed with the seventh transmission gear and the eighth transmission gear; the outer hollow shaft is provided with a main box synchronizer which can be respectively connected with the second transmission gear and the first transmission gear; and a front planet carrier of the front planet row power coupling mechanism is provided with a secondary box synchronizer which can be respectively connected with the front sun gear and the shell.
The invention further improves that a tenth transmission gear is arranged on the central shaft, and an eleventh transmission gear meshed with the tenth transmission gear is arranged on the adapting shaft; the rear gear of the transfer shaft is meshed with the seventh transmission gear.
The invention further improves that the sliding sleeve locking device comprises a central shaft gear hub connected and installed with the central shaft, an inner hollow shaft gear hub connected and installed with the inner hollow shaft and a sliding sleeve installed on the shell; the sliding sleeve is provided with three gears, namely, a gear hub connected with the central shaft, a gear hub connected with the inner hollow shaft and a neutral gear.
The invention further improves that the main box synchronizer is provided with three gears, namely, a first transmission gear, a second transmission gear and a neutral gear; the auxiliary box synchronizer is provided with two gears which are respectively connected with the front sun gear and the shell.
Further improvements of the invention are that a torque plate for connecting with the secondary box synchronizer is mounted on the housing.
A further development of the invention provides that the engine is in driving connection with the central shaft via a clutch.
The invention further improves that the generator is connected with the inner hollow shaft in a transmission way through a generator speed reducing system; the generator speed reducing system comprises a third transmission gear, a fourth transmission gear and a ninth transmission gear which are sequentially meshed; the third transmission gear is connected with an output shaft of the generator, and the ninth transmission gear is connected with the inner hollow shaft.
Further improvements of the present invention are provided in which the central shaft, the inner hollow shaft and the outer hollow shaft are rotatably mounted to the housing by bearings, respectively.
From the technical scheme, the beneficial effects of the invention are as follows:
the power of the driving motor is transmitted to the front sun wheel through a driving motor gearbox system; the power of the engine is transmitted to the rear planet carrier through the central shaft; the generator is in transmission connection with the rear sun wheel through the inner hollow shaft, so that the rotation speed of the rear sun wheel can be regulated and reversely charged, and the three power is coupled under different conditions through the double-planet-row power coupling mechanism. The whole structure is simple, the design is compact, and the practicality is good.
The speed of the rear sun gear and the rear planet carrier is respectively regulated by the generator and the engine, stepless speed change, engine rotating speed and vehicle speed decoupling are realized, the engine can continuously run in a high-efficiency interval at a constant speed, the fuel saving rate is improved, and the running economy of the whole vehicle is improved. The speed ratio range of the gearbox can be widened through the adjustment of the main box synchronizer and the auxiliary box synchronizer so as to enhance the dynamic property of the whole vehicle. The sliding sleeve position of the sliding sleeve locking device is adjusted to realize flexible switching of a pure electric mode, a hybrid mode and an engine direct-drive mode under complex working conditions. The uninterrupted output power in the gear shifting process under each working mode is realized through the torque compensation of the generator and the engine.
Through the left, middle and right adjustment of the composite sliding sleeve, three working modes of limp home, driving motor power taking and engine power taking can be respectively realized. The engine power can be used for realizing full-working-condition coverage when the electric appliance fault motor cannot work, the vehicle does not need a trailer, the operation efficiency is improved, the power taking of the engine or the motor can be realized, the power taking requirement of the whole vehicle under different working conditions is met, and the use requirement of the complex working conditions of the heavy vehicle is met.
The heavy truck hybrid system with the combined power taking and limp home functions can be widely applied to the field of new energy commercial vehicles, particularly for heavy trucks with complex working conditions and more upward and downward slopes, the power performance of the whole truck is ensured, the comfort, safety and economy of the whole truck are improved, and the heavy truck hybrid system has wide popularization and application prospects and good practicability.
Drawings
In order to more clearly illustrate the technical solutions of the present invention, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural view of a sliding sleeve locking device according to an embodiment of the present invention.
Fig. 3 is a schematic structural view of a composite sliding sleeve according to an embodiment of the present invention in different positions.
In the accompanying drawings: 1. a central shaft, 2, a shell, 3, a front planet carrier, 4, a front sun gear, 5, a gear ring, 6, a double planetary gear power coupling mechanism, 7, a rear planet carrier, 8, an output shaft, 9, a rear sun gear, 10, an inner hollow shaft, 11, a torque transmission plate, 12, a secondary box synchronizer, 13, a first transmission gear, 14, a main box synchronizer, 15, a second transmission gear, 16, a third transmission gear, 17, an outer hollow shaft, 18, a sliding sleeve locking device, 19, a fourth transmission gear, 20, an axle, 21, a fifth transmission gear, 22, a sixth transmission gear, 23, a seventh transmission gear, 24, an eighth transmission gear, 25, a connecting shaft, 26, a generator, 27, a driving motor, 28, an engine, 29, a clutch, 30, an inner hollow shaft gear hub, 31, a sliding sleeve, 32, a shifting fork, 33, a central shaft gear hub, 34, a ninth transmission gear, 35, a tenth transmission gear, 36, an eleventh transmission gear, 37, a switching shaft, 38, a power takeoff, 39, a switching shaft rear gear, 40, a composite gear hub, a gear hub, and a gear hub, 43.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of the present invention will be clearly and completely described below with reference to the drawings in this specific embodiment, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, based on the embodiments in this patent, which would be within the purview of one of ordinary skill in the art without the particular effort to make the invention are intended to be within the scope of the patent protection.
As shown in fig. 1-3, the invention discloses a heavy truck hybrid system with combined power take-off and limp home functions, which comprises a shell 2, a generator 26, a driving motor 27, an engine 28, an axle 20, a double planetary gear train power coupling mechanism 6, an adapter shaft 37 and a power take-off 38;
The double planetary gear set power coupling mechanism 6 comprises a front planetary gear set power coupling mechanism and a rear planetary gear set power coupling mechanism; the front planet row power coupling mechanism comprises a front sun gear 4, a front planet carrier 3 and a plurality of planet gears arranged on the front planet carrier 3, and the rear planet row power coupling mechanism comprises a rear sun gear 9, a rear planet carrier 7 and a plurality of planet gears arranged on the rear planet carrier 7; the outer rings of a plurality of planetary gears of the front planetary gear power coupling mechanism and the rear planetary gear power coupling mechanism are meshed with a gear ring 5, the gear ring 5 is rotatably connected with the shell 2 through a bearing, and the gear ring 5 is in transmission connection with an axle 20 through an output shaft 8 so as to drive wheels and realize advancing;
The engine 28 is connected with the rear planet carrier 7 through the central shaft 1; the rear sun gear 9 is connected with an inner hollow shaft 10, and the generator 26 is in transmission connection with the inner hollow shaft 10; the front sun gear 4 is connected with an outer hollow shaft 17, and a driving motor 27 is in transmission connection with the outer hollow shaft 17 through a driving motor gearbox system;
The transfer shaft 37 is rotatably mounted on the shell 2 through a bearing, the transfer shaft 37 is in transmission connection with the central shaft 1, the transfer shaft 37 is connected and mounted with a transfer shaft gear hub 41, a transfer shaft rear gear 39 meshed with a gear in a driving motor gearbox system is rotatably mounted on the transfer shaft 37, the transfer shaft rear gear 39 is connected with a transfer shaft rear gear hub 44 through a sleeve, and the sleeve is rotatably sleeved on the transfer shaft 37 through a needle bearing;
the power take-off 38 is connected with a power take-off gear hub 43 through a power take-off shaft 42;
The shell 2 is provided with a sliding sleeve locking device 18 capable of locking the central shaft 1 and the inner hollow shaft 10 respectively and a composite sliding sleeve 40 capable of connecting the rear gear tooth hub 44 of the transfer shaft, the gear tooth hub 41 of the transfer shaft and the gear tooth hub 43 of the power take-off shaft in pairs respectively; the inner side of the composite sliding sleeve 40 is provided with an internal spline, the two grooves divide the internal spline into three sections, and two of the gear tooth hub 44, the switching shaft gear hub 41 and the power take-off shaft gear hub 43 can be selectively connected by adjusting the axial position of the composite sliding sleeve 40, so that flexible switching of limp home, driving motor power taking and engine power taking modes is realized.
The central shaft 1, the inner hollow shaft 10 and the outer hollow shaft 17 are coaxially arranged from inside to outside, so that the space arrangement is more compact, and higher integration level is ensured.
As shown in fig. 1, the driving motor gearbox system comprises a fifth transmission gear 21 connected and installed with an output shaft of a driving motor 27, a sixth transmission gear 22 connected and installed through a connecting shaft 25, a seventh transmission gear 23 and an eighth transmission gear 24; the fifth transmission gear 21 is meshed with the sixth transmission gear 22; the outer hollow shaft 17 is rotatably provided with a second transmission gear 15 and a first transmission gear 13 which are respectively meshed with a seventh transmission gear 23 and an eighth transmission gear 24; the outer hollow shaft 17 is provided with a main box synchronizer 14 which can be respectively connected with the second transmission gear 15 and the first transmission gear 13; a front carrier 3 of the front planetary power coupling mechanism is provided with a sub-tank synchronizer 12 capable of being connected with the front sun gear 4 and the housing 2, respectively. The front planet carrier 3 is connected with the auxiliary box synchronizer 12 through a sleeve, and the sleeve is sleeved on the outer side of the outer hollow shaft 17 in a rotating mode. Through the arrangement of the main box synchronizer 14 and the auxiliary box synchronizer 12, arrangement of a plurality of gears can be realized, the speed ratio range of the gearbox can be widened, and the dynamic property of the whole vehicle is enhanced.
The second transmission gear 15, the first transmission gear 13 and the front planetary power coupling mechanism are sequentially arranged from left to right, the main box synchronizer 14 is arranged between the second transmission gear 15 and the first transmission gear 13, and the auxiliary box synchronizer 12 is arranged between the first transmission gear 13 and the front planetary power coupling mechanism. The compactness and the rationality of the space arrangement are ensured.
Wherein, the transmission ratio of the seventh transmission gear 23 to the second transmission gear 15 is different from the transmission ratio of the eighth transmission gear 24 to the first transmission gear 13, so that a wider rotation speed output range can be ensured. The transmission ratio of the former is smaller than that of the latter, and can be respectively 1:4 and 1:8.
As shown in fig. 1, a tenth transmission gear 35 is mounted on the center shaft 1, and an eleventh transmission gear 36 meshed with the tenth transmission gear 35 is mounted on the adapter shaft 37; the adapter rear gear 39 is meshed with the seventh transfer gear 23. Stable and reliable power transmission from the central shaft 1 to the adapter shaft 37 is realized through the engagement of the tenth transmission gear 35 and the eleventh transmission gear 36; the seventh transmission gear 23 is meshed with the rear gear 39 of the transfer shaft, so that the power take-off of the driving motor can be realized.
As shown in fig. 1-2, the sliding sleeve locking device 18 comprises a central shaft gear hub 33 connected and installed with the central shaft 1, an inner hollow shaft gear hub 30 connected and installed with the inner hollow shaft 10, and a sliding sleeve 31 installed on the shell 2; the sliding sleeve 31 has three gears, namely, a connection with the central shaft gear hub 33, a connection with the inner hollow shaft gear hub 30 and a neutral gear. A fork 32 for adjusting the slide bush 31 to the left and right is also mounted on the housing 2. Inner ring and outer ring of sliding sleeve 31 respectively provided with an inner part the external spline is provided with a plurality of external splines, the outer ring of the sliding sleeve 31 is provided with a radial groove, a fork 32 is inserted into this groove. The inner ring of the shell 2 is provided with an internal spline, two axial grooves are symmetrically distributed on two sides of the shell 2, and the shifting fork 32 is allowed to drive the sliding sleeve 31 to axially translate in the internal spline of the shell. The inner hollow shaft gear hub 30 is in spline connection with the inner hollow shaft 10, and when the sliding sleeve inner spline is in spline connection with the inner hollow shaft gear hub, the inner hollow shaft 10 cannot rotate. The central shaft gear hub 33 is connected with the central shaft 1 through a spline, and when the sliding sleeve internal spline is connected with the central shaft gear hub external spline, the central shaft 1 cannot rotate. Through the three gears of the sliding sleeve 31 of the sliding sleeve locking device 18 in the left, middle and right, the flexible switching among the pure electric mode, the direct engine driving mode and the hybrid mode can be realized.
By adjusting the main box synchronizer 14 and the auxiliary box synchronizer 12, the following four gear adjustments can be achieved:
When the auxiliary box synchronizer 12 moves rightwards, the front planet carrier 3 is connected with the shell 2 through a synchronizer spline, at the moment, the front planet carrier 3 is fixed, and the auxiliary box is in a low gear area; when the auxiliary box synchronizer 12 moves leftwards, the front planet carrier 3 is connected with the front sun gear 4 through a synchronizer spline, the rotating speed of the front sun gear 4 is consistent with that of the gear ring 5, and the auxiliary box is in a high gear area at the moment.
The main box synchronizer 14 moves left and right, so that the connection with the second transmission gear 15 and the first transmission gear 13 can be realized, and the gear positions are respectively a high gear and a low gear; so that the main tank has a high gear zone and a low gear zone.
The arrangement of four gears can be flexibly achieved by combining the high gear region and the low gear region of the main box with the high gear region and the low gear region of the auxiliary box (adjusting the respective left and right gears of the main box synchronizer 14 and the auxiliary box synchronizer 12), respectively: high, medium low and low.
By adjusting the position of the sliding sleeve 31 of the sliding sleeve locking device 18 (connected with the central shaft gear hub 33, connected with the inner hollow shaft gear hub 30 and neutral gear), flexible switching of the electric-only mode, the engine direct drive mode and the hybrid mode can be achieved. The method comprises the following steps:
pure electric mode: the sliding sleeve 31 moves leftwards through the operation of the shifting fork 32, the internal spline of the sliding sleeve 31 is connected with the external spline of the central shaft gear hub 33, the central shaft 1 is fixed, and the power of the driving motor 27 is transmitted to the front sun gear 4 through the external hollow shaft 17; and according to the actual power requirement of the whole vehicle, the generator 26 can be selectively participated in driving, the power of the generator 26 is transmitted to the rear sun gear 9 through the inner hollow shaft 10, and the power is transmitted to the output shaft 8 in a coupling way at the gear ring 5.
Engine direct drive mode: the sliding sleeve 31 moves rightwards through the operation of the shifting fork 32, the internal spline of the sliding sleeve 31 is connected with the external spline of the internal hollow shaft gear hub 30, the internal hollow shaft 10 is fixed with the rear sun gear 9, and the power of the engine 28 is transmitted to the rear planet carrier 7 through the central shaft 1 and is transmitted to the output shaft 8 through the gear ring 5.
Mixing mode: the sliding sleeve 31 is in a neutral position, the internal spline of the sliding sleeve 31 is not connected with any part, the power of the engine 28 is transmitted to the rear planet carrier 7 through the central shaft 1 for power split, the power is split to the gear ring 5 and the rear sun gear 9 respectively, and the rear sun gear 9 is transmitted to the generator 26 through the internal hollow shaft 10 for power generation. If the power is insufficient, the power of the driving motor 27 is transmitted to the front sun gear 4 through the outer hollow shaft 17, and the power of the driving motor 27 and the power of the engine 28 are coupled at the gear ring 5 for power coupling and output. During the speed-fixing high-efficiency interval of the engine 28, the rotation speed of the generator 26 is controlled, so that the rotation speed of the rear sun gear 9 can be adjusted to change the rotation speed of the output shaft 8, and at the moment, the rotation speed of the engine 28 and the vehicle speed are decoupled and infinitely variable.
When the pure electric mode gearbox is shifted, the sliding sleeve 31 is positioned at the left end of the locking central shaft 1, and the power of the generator 26 is transmitted to the gear ring 5 through the inner hollow shaft 10 and the rear sun gear 9 for torque compensation. When the transmission is shifted in the hybrid mode, the engine 28 transmits power to the ring gear 5 for torque compensation by driving the rear carrier 7. Uninterrupted output power during gear shifts in each operating mode is achieved by torque compensation of the generator 26 and the engine 28.
As shown in fig. 3, through the left, middle and right adjustment of the composite sliding sleeve 40, the engagement of the adapter shaft gear hub 41 and the adapter shaft rear gear hub 44, the engagement of the power take-off shaft gear hub 43 and the adapter shaft rear gear hub 44, and the engagement of the adapter shaft gear hub 41 and the power take-off shaft gear hub 43 can be respectively realized, so that three working modes of limp home, power take-off of the driving motor and power take-off of the engine are respectively realized. The method comprises the following steps:
limp home mode: operating the composite sliding sleeve 40 to the leftmost position, wherein an internal spline of the composite sliding sleeve 40 is connected with an external spline of the rear gear tooth hub 44 of the transfer shaft and the gear tooth hub 41 of the transfer shaft, and the sliding sleeve 31 in the sliding sleeve locking device 18 is positioned at the middle position; when the auxiliary box synchronizer 12 is in the low gear position (the front planet carrier 3 is fixed), the auxiliary box synchronizer is in a limp home mode forward gear; when the auxiliary box synchronizer 12 is in the high gear position (the front planet carrier 3 and the front sun gear 4 are connected through the synchronizer spline), the reverse gear is realized in the limp home mode. And the high gear and the low gear of the forward gear or the reverse gear of the limp home mode are determined by adjusting the position of the main box synchronizer 14 according to the running condition of the whole vehicle, so that the limp home mode has the forward gear and the reverse gear, and the use requirements of complex conditions of the heavy vehicle are met. The engine 28 can normally drive the vehicle to run when the electric appliance fails when the limp home is reached, and the power transmission path of the engine 28 is as follows: the central shaft 1, the tenth transmission gear 35, the eleventh transmission gear 36, the transfer shaft 37, the transfer shaft gear hub 41, the composite sliding sleeve 40, the transfer shaft rear gear hub 44, the transfer shaft rear gear 39 (the upper gear is the seventh transmission gear 23, the second transmission gear 15, the lower gear is the seventh transmission gear 23, the connecting shaft 25, the eighth transmission gear 24 and the first transmission gear 13), the outer hollow shaft 17 and the front sun gear 4, and power is sequentially transmitted to the gear ring 5 and the output shaft 8 through the double-planet-row power coupling mechanism 6 for driving the wheels by the axle 20.
Engine power take-off mode: operating the composite sliding sleeve 40 to the rightmost position, wherein the internal spline of the composite sliding sleeve 40 is connected with the external spline of the switching shaft gear hub 41 and the power taking shaft gear hub 43, and the power transmission path of the engine 28 is as follows: the central shaft 1, the tenth transmission gear 35, the eleventh transmission gear 36, the adapter shaft 37, the adapter shaft gear hub 41, the composite sliding sleeve 40, the power take-off shaft gear hub 43 and the power take-off shaft 42 are finally transmitted to the power take-off 38, so that the power take-off of the engine is realized.
Driving motor power take-off mode: operating the composite sliding sleeve 40 to the middle position, wherein the internal spline of the composite sliding sleeve 40 is connected with the external spline of the rear gear tooth hub 44 of the transfer shaft and the external spline of the gear tooth hub 43 of the power take-off shaft, and the power transmission path of the driving motor 27 is as follows: the fifth transmission gear 21, the sixth transmission gear 22, the connecting shaft 25, the seventh transmission gear 23, the transfer shaft rear gear 39, the transfer shaft rear gear tooth hub 44, the composite sliding sleeve 40, the power take-off shaft tooth hub 43 and the power take-off shaft 42 are finally transmitted to the power take-off 38, so that the power take-off of the driving motor is realized.
Not only can the limp home mode be realized through the composite sliding sleeve 40, but also the composite power taking of the engine and the driving motor can be realized, and the use requirement of the complex working condition of the heavy vehicle is met.
The main box synchronizer 14 is provided with three gears, namely a first transmission gear 13, a second transmission gear 15 and a neutral gear; the auxiliary box synchronizer 12 has two gears, which are respectively connected with the front sun gear 4 and with the housing 2. The gear of the main box synchronizer 14 and the auxiliary box synchronizer 12 is adjusted, so that multiple working modes can be realized, and the device is simple in structure and easy to realize.
Wherein, the shell 2 is provided with a torque transmission plate 11 which is used for being connected with a secondary box synchronizer 12. The torque transmission plate 11 transmits torque, has higher structural strength, and ensures the reliability of positioning the front planet carrier 3 and prevents the front planet carrier 3 from rotating when the auxiliary box synchronizer 12 is connected with the torque transmission plate 11.
Wherein the engine 28 is in driving connection with the central shaft 1 via a clutch 29. Disconnection and connection of the power transmission can be flexibly achieved by the clutch 29.
Wherein, as shown in FIG. 1, the generator 26 is in driving connection with the inner hollow shaft 10 through a generator deceleration system; the generator deceleration system comprises a third transmission gear 16, a fourth transmission gear 19 and a ninth transmission gear 34 which are sequentially meshed; the third transfer gear 16 is mounted in connection with the output shaft of the generator 26 and the ninth transfer gear 34 is mounted in connection with the inner hollow shaft 10. The generator 26 is in transmission connection with the inner hollow shaft 10 through the third transmission gear 16, the fourth transmission gear 19 and the ninth transmission gear 34, so that the reliability of power transmission of the generator 26 and the stability of reverse charging of the generator 26 are ensured.
Wherein the central shaft 1, the inner hollow shaft 10 and the outer hollow shaft 17 are rotatably mounted with the housing 2 via bearings, respectively. The gear ring 5, the output shaft 8, the central shaft of the fourth transmission gear 19, the connecting shaft 25, the transfer shaft 37 and the power take-off shaft 42 are all rotatably mounted with the shell 2 through bearings, and the power take-off 38, the generator 26, the driving motor 27 and the engine 28 are fixedly mounted on the shell 2. It should be noted that the housing 2 refers to a housing that seals the transmission member and is fixedly mounted to the vehicle frame; there may be a plurality of such as a transmission housing, etc. at the same time; it may be one, sealing and packaging all transmission components except the axle 20, generator 26, engine 28, drive motor 27, and power take-off 38.
The heavy-duty truck hybrid system with the combined power taking and limp home functions has three power sources: a generator 26, a drive motor 27 and an engine 28, and the generator 26 can be charged in reverse; the power of the drive motor 27 is transmitted to the front sun gear 4 through a drive motor gearbox system; the power of the engine 28 is transmitted to the rear carrier 7 through the center shaft 1; the generator 26 is in transmission connection with the rear sun gear 9 through the inner hollow shaft 10, so that the rotation speed of the rear sun gear 9 can be regulated and reversely charged, and the three power is coupled in different conditions through the double planetary power coupling mechanism 6. The whole structure is simple, the design is compact, and the practicality is good.
The speed of the rear sun gear 9 and the rear planet carrier 7 is respectively regulated through the generator 26 and the engine 28, stepless speed change, and decoupling of the rotating speed and the vehicle speed of the engine 28 are realized, the engine 28 can continuously run in a high-efficiency interval at a constant speed, and the fuel saving rate and the running economy of the whole vehicle are improved. The speed ratio range of the gearbox can be widened by adjusting the main box synchronizer 14 and the auxiliary box synchronizer 12 so as to enhance the dynamic property of the whole vehicle. The position of the sliding sleeve 31 of the sliding sleeve locking device 18 is adjusted to realize flexible switching of a pure electric mode, a hybrid mode and an engine direct drive mode under complex working conditions. Uninterrupted output power during gear shifts in each operating mode is achieved by torque compensation of the generator 26 and the engine 28.
By the left, middle and right adjustment of the composite sliding sleeve 40, three working modes of limp home, driving motor power taking and engine power taking can be respectively realized. The engine power can be used for realizing full-working-condition coverage when the electric appliance fault motor cannot work, the vehicle does not need a trailer, the operation efficiency is improved, the power taking of the engine or the motor can be realized, the power taking requirement of the whole vehicle under different working conditions is met, and the use requirement of the complex working conditions of the heavy vehicle is met.
The heavy truck hybrid system with the combined power taking and limp home functions can be widely applied to the field of new energy commercial vehicles, particularly for heavy trucks with complex working conditions and more upward and downward slopes, the power performance of the whole truck is ensured, the comfort, safety and economy of the whole truck are improved, and the heavy truck hybrid system has wide popularization and application prospects and good practicability.
In the present specification, each embodiment is described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same and similar parts between the embodiments are only required to be referred to each other.
The terms "upper", "lower", "outside", "inside", and the like in the description and in the claims of the present invention and in the above drawings, if any, are used for distinguishing between relative relationships in position and not necessarily for giving qualitative sense. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (7)

1. The heavy-duty truck hybrid system with the combined power taking and limp home functions is characterized by comprising a shell (2), a generator (26), a driving motor (27), an engine (28), an axle (20), a double-row planetary power coupling mechanism (6), a switching shaft (37) and a power taking device (38);
the double-planet-row power coupling mechanism (6) comprises a front planet-row power coupling mechanism and a rear planet-row power coupling mechanism, wherein the outer rings of the planet gears of the front planet-row power coupling mechanism and the rear planet-row power coupling mechanism are meshed with a gear ring (5) together, and the gear ring (5) is in transmission connection with an axle (20);
The engine (28) is connected with a rear planet carrier (7) of the rear planet row power coupling mechanism through a central shaft (1); the rear sun gear (9) of the rear planet row power coupling mechanism is connected with an inner hollow shaft (10), and the generator (26) is in transmission connection with the inner hollow shaft (10); the front sun gear (4) of the front planetary gear power coupling mechanism is connected with an outer hollow shaft (17), and a driving motor (27) is in transmission connection with the outer hollow shaft (17) through a driving motor gearbox system;
The transfer shaft (37) is in transmission connection with the central shaft (1), a transfer shaft gear hub (41) is arranged on the transfer shaft, a transfer shaft rear gear (39) meshed with a gear in the driving motor gearbox system is rotatably arranged on the transfer shaft, and a transfer shaft rear gear hub (44) is connected on the transfer shaft rear gear (39);
the power take-off (38) is connected with a power take-off shaft gear hub (43) through a power take-off shaft (42);
A sliding sleeve locking device (18) capable of locking the central shaft (1) and the inner hollow shaft (10) and a composite sliding sleeve (40) capable of connecting the rear gear tooth hub (44) of the transfer shaft, the gear tooth hub (41) of the transfer shaft and the gear tooth hub (43) of the power take-off shaft in pairs are arranged on the shell (2);
the central shaft (1), the inner hollow shaft (10) and the outer hollow shaft (17) are coaxially arranged from inside to outside;
The driving motor gearbox system comprises a fifth transmission gear (21) which is connected and installed with an output shaft of a driving motor (27), a sixth transmission gear (22) which is connected and installed through a connecting shaft (25), a seventh transmission gear (23) and an eighth transmission gear (24); the fifth transmission gear (21) is meshed with the sixth transmission gear (22); a second transmission gear (15) and a first transmission gear (13) which are respectively meshed with the seventh transmission gear (23) and the eighth transmission gear (24) are rotatably arranged on the outer hollow shaft (17); a main box synchronizer (14) which can be respectively connected with the second transmission gear (15) and the first transmission gear (13) is arranged on the outer hollow shaft (17); a front planet carrier (3) of the front planet row power coupling mechanism is provided with a secondary box synchronizer (12) which can be respectively connected with a front sun gear (4) and a shell (2);
the main box synchronizer (14) is provided with three gears, namely a first gear (13) connected with the second transmission gear (15) and a neutral gear; the auxiliary box synchronizer (12) is provided with two gears, which are respectively connected with the first transmission gear (13) and the shell (2).
2. The heavy truck mixing system with the combined power taking and limp home function according to claim 1, wherein a tenth transmission gear (35) is arranged on the central shaft (1), and an eleventh transmission gear (36) meshed with the tenth transmission gear (35) is arranged on the adapting shaft (37); the rear gear (39) of the transfer shaft is meshed with the seventh transmission gear (23).
3. The heavy truck mixing system with composite power taking and limp home functions according to claim 1, characterized in that the sliding sleeve locking device (18) comprises a central shaft gear hub (33) connected and installed with the central shaft (1), an inner hollow shaft gear hub (30) connected and installed with the inner hollow shaft (10) and a sliding sleeve (31) installed on the shell (2); the sliding sleeve (31) is provided with three gears, namely, a gear connected with the central shaft gear hub (33), a gear connected with the inner hollow shaft gear hub (30) and a neutral gear.
4. The heavy truck mixing system with combined power take-off and limp home function according to claim 1, characterized in that a torque transmission plate (11) for connecting with a secondary tank synchronizer (12) is mounted on the housing (2).
5. Heavy truck hybrid system with compound power take-off and limp home function according to claim 1, characterized in that the engine (28) is in driving connection with the central shaft (1) through a clutch (29).
6. Heavy truck hybrid system with combined power take-off and limp home function according to claim 1, characterized in that the generator (26) is in driving connection with the inner hollow shaft (10) through a generator reduction system; the generator deceleration system comprises a third transmission gear (16), a fourth transmission gear (19) and a ninth transmission gear (34) which are sequentially meshed; the third transmission gear (16) is connected with an output shaft of the generator (26), and the ninth transmission gear (34) is connected with the inner hollow shaft (10).
7. Heavy truck mixing system with combined power take-off and limp home function according to claim 1, characterized in that the central shaft (1), the inner hollow shaft (10) and the outer hollow shaft (17) are rotatably mounted with the housing (2) by means of bearings, respectively.
CN202210300101.5A 2022-03-25 2022-03-25 Heavy-duty truck hybrid system with combined power taking and limp home functions Active CN114604075B (en)

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