CN114953968A - Driving transmission system of hybrid power vehicle - Google Patents

Driving transmission system of hybrid power vehicle Download PDF

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Publication number
CN114953968A
CN114953968A CN202210615632.3A CN202210615632A CN114953968A CN 114953968 A CN114953968 A CN 114953968A CN 202210615632 A CN202210615632 A CN 202210615632A CN 114953968 A CN114953968 A CN 114953968A
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China
Prior art keywords
power
motor
transmission
clutch
gear
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Pending
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CN202210615632.3A
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Chinese (zh)
Inventor
关崴
李晓宇
姚书涛
张雪峰
苏俊元
张晓冬
袁小星
华静雪
宋名
张鹏
谭望
李承鹏
杨献亮
于泳宁
赵生波
李天威
张子健
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Harbin Dongan Automotive Engine Manufacturing Co Ltd
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Harbin Dongan Automotive Engine Manufacturing Co Ltd
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Priority to CN202210615632.3A priority Critical patent/CN114953968A/en
Publication of CN114953968A publication Critical patent/CN114953968A/en
Pending legal-status Critical Current

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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
    • 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 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 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 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 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
    • 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
    • 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 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 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
    • 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 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 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/44—Series-parallel type
    • B60K6/442—Series-parallel switching type
    • 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
    • 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 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
    • B60K6/547—Transmission for changing ratio the transmission being a stepped gearing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Structure Of Transmissions (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

A driving transmission system of a hybrid power vehicle belongs to the technical field of hybrid power vehicle transmissions. The engine crankshaft is connected with a first planet carrier through a transmission input shaft, the first planet carrier is connected with a first clutch inner hub, the first planet carrier is matched with a one-way clutch inner ring, and a rotor shaft of a second motor is connected with a second brake inner hub and a second sun gear; the third sun wheel is connected with the first inner hub of the brake, the short planet wheel and the long planet wheel are connected with the first planet carrier, the third sun wheel is meshed with the short planet wheel, the short planet wheel and the second sun wheel are meshed with the long planet wheel, the long planet wheel is meshed with the first outer gear ring, the first outer gear ring is connected with the first clutch and the second clutch outer hub, the second clutch inner hub is connected with a transmission output shaft, a rotor shaft of the first motor is connected with the first sun wheel, the second planet carrier is connected with the transmission output shaft and a transmission mechanism planet wheel, the first sun wheel is meshed with a transmission mechanism planet wheel, and the transmission mechanism planet wheel is meshed with the second outer gear ring. The invention can realize the switching of a plurality of working modes.

Description

Hybrid vehicle drive transmission system
Technical Field
The invention belongs to the technical field of hybrid vehicle transmissions, and particularly relates to a hybrid vehicle drive transmission system.
Background
In recent years, hybrid vehicles are a branch of new energy technologies, have the advantages of better fuel economy, low emission and the like, and become competitive research and development of new vehicles. The emergence of the motor hybrid technology opens up a new way for realizing the complete matching of the power between the internal combustion engine and the power wheel. Among the various designs of power assemblies, the most representative hybrid systems are series, parallel and series-parallel hybrid systems, and the specific structure has various deformations, each of which has advantages and disadvantages. In the series hybrid system, an internal combustion engine, a generator, a motor, a shafting and a driving wheel form a series power chain, and the power assembly has extremely simple structure but lower energy utilization rate. The parallel hybrid system has two independent power chains in parallel: one is composed of a traditional mechanical speed changer, and the other is composed of a motor and a battery system. The mechanical transmission is responsible for completing speed regulation, the motor and the battery system are used for completing power or torque regulation, and the number of parallel gears influences that the engine cannot always work in a high-efficiency area. The effect of adjusting the fuel consumption area of the engine in the series-parallel mode is good, but the low-speed dynamic performance and the high-speed economical efficiency are relatively inferior to those in the parallel mode.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a hybrid vehicle drive transmission system.
The hybrid vehicle drive transmission system of the invention has a pure electric mode, a series mode, a parallel mode and a parallel power split mode; according to the working condition requirements of the vehicle, different working modes are selected to meet the requirements of the vehicle, and meanwhile, the hybrid power system and the engine are in an efficient working area. The pure electric mode of the system provides a mode that when the engine does not provide power, the electric energy is provided by the battery to drive the motor to work independently, and the normal running of the vehicle is realized through the variable speed transmission mechanism. The pure electric mode is divided into two power driving modes according to the working condition of the motor, wherein one power driving mode is a single-motor working mode, and the other power driving mode is a double-motor working mode. In the series mode, the engine can drive the motor to generate electricity, the rear end drive motor is provided with electric energy, and the series range extending mode is realized. In the parallel mode, the engine can work independently, the variable speed transmission mechanism can normally transmit power to drive the whole vehicle to run, and meanwhile, the motor can be used for adjusting the torque of the engine to improve the efficiency of the engine. The hybrid power split mode is used for driving the vehicle to normally run by applying the simultaneous work of the engine and the motor; by controlling the motor to work, the rotating speed and the torque working point of the engine can be adjusted, and the oil consumption of the engine is reduced. In the running process of the vehicle, the fuel consumption of the vehicle can be effectively saved by switching the working modes.
In order to realize the purpose, the technical scheme of the invention is as follows:
a hybrid vehicle drive transmission system comprises an engine, two motors, two clutches, two brakes, a power distribution mechanism, a variable speed transmission mechanism and a one-way clutch; the power distribution mechanism comprises a sun gear II, a sun gear III, a planet carrier I, a short planet gear, a long planet gear and an outer gear ring I; the variable speed transmission mechanism comprises a first sun gear, a second planet carrier, a planetary gear of the variable speed transmission mechanism and a second outer gear ring; the two motors are respectively a motor II and a motor I; the two clutches are a first clutch and a second clutch respectively; the two brakes are respectively a brake I and a brake II;
the crankshaft of the engine is connected with the input shaft of the transmission, and the input shaft of the transmission is connected with the first planet carrier; the planet carrier I is connected with an inner hub of the clutch I, the planet carrier I is matched with an inner ring of the one-way clutch, and an outer ring of the one-way clutch is connected with the transmission shell; a rotor shaft of the motor II is connected with an inner hub of the brake II and a sun gear II; the sun gear III is connected with the inner hub of the brake I, and the outer hubs of the brake I and the brake II are integrated with the transmission shell; the short planet wheel and the long planet wheel are both connected with a planet carrier I, a sun wheel III is meshed with the short planet wheel, a short planet wheel and a sun wheel II are both meshed with the long planet wheel, the long planet wheel is meshed with an outer gear ring I, the outer gear ring I is connected with a clutch I and an outer hub of the clutch II, an inner hub of the clutch II is connected with a transmission output shaft, the outer gear ring II is fixedly connected with a transmission shell, a rotor shaft of a motor I is connected with the sun wheel I, the planet carrier II is connected with the transmission output shaft and a transmission mechanism planet wheel, the sun wheel I is meshed with a transmission mechanism planet wheel, and the transmission mechanism planet wheel is meshed with an outer gear ring II; and stators of the second motor and the first motor are arranged in the transmission shell.
Further, the first clutch and the second clutch share one outer hub, or the first clutch and the second clutch respectively have respective outer hubs, and the two outer hubs are connected through a spline or a welding mode.
Further, the hybrid vehicle drive train further includes a torsional damper or dual mass flywheel; a torsional damper or dual mass flywheel is connected between the transmission input shaft and the crankshaft of the engine, or a torsional damper or dual mass flywheel is connected between the transmission input shaft and the planet carrier.
Further, the hybrid vehicle drive train is capable of achieving the following modes of operation:
a first gear of a pure electric mode; the two clutches and the two brakes are disconnected, the engine and the motor II do not work, and the motor I works;
pure electric mode second gear; the first clutch and the two brakes are disconnected, the second clutch is combined, the engine does not work, and the two motors work;
parallel mode first gear; the first clutch and the second brake are both disconnected, the second clutch and the first brake are both combined, the engine works, and the two motors work;
a parallel mode second gear; the two clutches are combined, the two brakes are disconnected, the engine works, and the two motors work;
parallel mode third gear; the first clutch and the first brake are disconnected, the second clutch and the second brake are combined, the engine works, the second motor does not work, and the first motor works;
a series-parallel power splitting mode; the first clutch and the two brakes are disconnected, the second clutch is combined, and the engine and the two motors work;
a series range extending mode; the second brake and the two clutches are disconnected, the first brake is combined, and the engine and the two motors work;
a parking/parking power generation mode; the second brake and the two clutches are disconnected, the first brake is combined, the engine and the second motor work, and the first motor does not work.
Further, the power transmission path of the first gear of the pure electric mode is as follows:
the power of the vehicle is provided by the operation of a first motor, the first motor is fixedly connected with a first sun gear, a second outer gear ring is fixed with a transmission shell, the first sun gear is meshed with a planetary gear of a variable-speed transmission mechanism to transmit power, and the power is transmitted to an output shaft of the transmission through a second planetary carrier to output the power;
the power transmission path of the pure electric mode second gear is as follows:
the second clutch is combined, and the power of the vehicle is provided by the joint work of the first motor and the second motor; the inner hub and the outer hub of the second clutch are respectively connected with the output shaft of the transmission and the first outer gear ring, the inner ring of the one-way clutch is connected with the first planet carrier, the second motor works to provide reverse rotating speed and torque, and power is provided and transmitted to the first outer gear ring through the second sun gear and the long planet gear and is transmitted to the output shaft of the transmission through the second clutch; the first motor is fixedly connected with the first sun gear, the second outer gear ring is fixed with the shell of the transmission, and the first motor works, and power is transmitted to an output shaft of the transmission through the second planet carrier as the first sun gear is meshed with a planet gear of the transmission mechanism to transmit power; and the power of the first external gear ring and the second planet carrier is connected in parallel at the output shaft of the transmission for power transmission.
Further, the power transmission path of the parallel mode first gear is as follows:
the third sun gear is locked and cannot rotate due to the combination of the first brake; the engine works, and the power of the engine is transmitted to the long planet wheel through the planet carrier; the second motor works, power is transmitted to the long planetary gear through the second sun gear, the engine power and the second motor power are connected in parallel at the long planetary gear, and the parallel power is transmitted to the output shaft of the transmission through the first outer gear ring and the second clutch due to the combination of the second clutch; the power of the first motor is transmitted to a planetary gear of the variable speed transmission mechanism and a second planetary carrier through the sun gear when the first motor works, the second planetary carrier transmits the power to the output shaft of the transmission, and the power of the first outer gear ring and the power of the second planetary carrier are connected in parallel at the output shaft of the transmission for power transmission;
the power transmission path of the parallel mode second gear is as follows:
the engine and the two motors work, and the power of the engine is transmitted to the long planetary gear through the planetary frame; the power of the motor II is transmitted to the long planet gear through the sun gear II, and the power of the engine and the power of the motor II are connected in parallel at the long planet gear and transmitted to the outer gear ring I; due to the combination of the first clutch, the planet carrier is connected with the first outer gear ring, and the power distribution mechanism rotates at the same rotating speed; because the second clutch is combined, the power after parallel connection is transmitted to the output shaft of the transmission through the first outer gear ring and the second clutch; the power of the first outer gear ring and the power of the second planet carrier are connected in parallel at the output shaft of the speed changer for power transmission;
the power transmission path of the parallel mode third gear is as follows:
the second brake is combined, and the second motor and the second sun gear are fixed; the engine works, and the power of the engine is transmitted to the first outer gear ring through the first planet carrier and the long planet wheel; because the second clutch is combined, the power is transmitted to the output shaft of the transmission through the first outer gear ring and the second clutch; because the first motor works, the power of the first motor is transmitted to the second planet carrier through the first sun gear and the planet gear of the variable speed transmission mechanism, and the second planet carrier transmits the power to the output shaft of the transmission; and the power of the first external gear ring and the second planet carrier is connected in parallel at the output shaft of the transmission for power transmission.
Further, the power transmission path in the series-parallel power split mode is as follows;
the second negative torque of the motor works, and the torque of the engine is transmitted to the power distribution mechanism through the planet carrier, wherein: one part of torque is transmitted to the long planet wheel through the planet carrier, transmitted to the sun wheel II through the long planet wheel and transmitted to the motor II through the sun wheel II for power generation or driving; the other part of torque is transmitted to the first outer gear ring through the first planet carrier, and power is transmitted to the output shaft of the transmission through the first outer gear ring and the second clutch due to the combination of the second clutch; the first motor works, the power of the first motor is transmitted to the second planet carrier through the first sun gear and the planet gear of the variable speed transmission mechanism, and the second planet carrier transmits the power to the output shaft of the transmission; and the power of the first external gear ring and the second planet carrier is transmitted together at the output shaft of the transmission.
Further, the power transmission path in the series extended range mode is as follows;
the engine works, power is transmitted to the long planet wheel and the short planet wheel through the planet carrier, the long planet wheel transmits the power to the sun wheel II, the power is transmitted to the motor II through the sun wheel II for power generation, electric energy is supplied to the motor I, the motor I works, the power of the motor I is sequentially transmitted to the sun wheel I, the planet wheel of the variable speed transmission mechanism and the planet carrier II, and the planet carrier II transmits the power to the output shaft of the speed changer for power transmission.
Further, the power transmission path in the parking/parking power generation mode is as follows;
when the vehicle is parked/stopped, the first brake is combined, the engine is started through the second motor, after the engine is started successfully, the power of the engine is transmitted to the long planet wheel and the short planet wheel through the first planet carrier, the long planet wheel transmits the power to the second sun wheel, and the power is transmitted to the second motor through the second sun wheel to rotate and generate power to convert mechanical energy into electric energy due to the fact that the second sun wheel is connected with a rotor shaft of the second motor.
Compared with the prior art, the invention has the beneficial effects that:
1. simple structure, reasonable in design, cost are lower relatively, and based on the planet row integrated configuration and the part of the mature product in market, through increasing two motors, two clutches and two stopper, have realized possessing the pure electric mode, the series connection of single, bi-motor and have increased journey mode, the parallel mode and the series-parallel connection power reposition of redundant personnel mode of three fixed gear respectively.
2. The parallel-series power splitting mode can effectively improve the working condition of the engine, and the fuel economy and the dynamic property of the vehicle within the full working condition range can be effectively solved by combining three fixed gears connected in parallel, so that the engine can be always in a high-efficiency area, and the excellent fuel consumption performance of the whole vehicle can be achieved.
3. In the switching process of each mode, the motor participates in driving, so that the problem of power interruption does not exist;
4. the hybrid vehicle driving transmission system can cover HEV hybrid vehicles and PHEV plug-in hybrid vehicles, and has good platformization;
5. although the relative cost is increased due to the addition of the motor, the oil consumption is reduced (by about 24%) from the perspective of the whole vehicle, the target of the new energy automobile is achieved, the energy conservation and emission reduction are achieved, and the emission regulation requirement is met. The hybrid power vehicle driving transmission system has the advantages of reasonable structural configuration, simplicity in assembly, low cost and the like.
In summary, the hybrid driving apparatus of the present invention includes a plurality of hybrid systems, and integrates the operating characteristics of the plurality of hybrid systems. According to the vehicle demand, select for use different hybrid systems, mainly can make the engine operation in the high efficiency district through the coordinated operation of motor to improve whole system efficiency, and low cost, lightweight, compact structure.
Drawings
FIG. 1 is a schematic illustration of a first aspect of a hybrid vehicle drive train of the present invention;
FIG. 2 is a schematic representation of a second aspect of a hybrid vehicle drive train of the present invention.
The names and reference numbers of the components referred to in the above figures are as follows:
the transmission comprises an engine 1, a torsional damper 2, a motor II 3, a motor I4, a clutch I5, a clutch II 6, a brake I7, a brake II 8, a sun gear II 9, a sun gear III 10, a planet carrier I11, an outer gear ring I12, a short planet gear 13, a long planet gear 14, a sun gear I15, a planet carrier II 16, an outer gear ring II 17, a speed change transmission mechanism planet gear 18, a transmission output shaft 19, a power distribution mechanism 20, a speed change transmission mechanism 21, a one-way clutch 22, a transmission input shaft 23 and a transmission shell 24.
Detailed Description
The first embodiment is as follows: as shown in fig. 1, the present embodiment describes a hybrid vehicle drive transmission system including an engine 1, two motors, two clutches, two brakes, a power split mechanism 20, a speed change transmission mechanism 21, and a one-way clutch 22; the power distribution mechanism 20 comprises a second sun gear 9, a third sun gear 10, a first planet carrier 11, a short planet gear 13, a long planet gear 14 and a first outer gear ring 12 (teeth are arranged on the inner ring surface of the first outer gear ring 12); the variable speed transmission mechanism 21 comprises a first sun gear 15, a second planet carrier 16, a planetary gear 18 of the variable speed transmission mechanism and a second outer gear ring 17 (teeth are arranged on the inner ring surface of the second outer gear ring 17); the two motors are respectively a motor II 3 and a motor I4; the two clutches are a first clutch 5 and a second clutch 6 respectively; the two brakes are a brake I7 and a brake II 8 respectively;
the crankshaft of the engine 1 is connected with a transmission input shaft 23, and the transmission input shaft 23 is connected with a first planet carrier 11; the planet carrier I11 is connected with an inner hub of the clutch I5, the planet carrier I11 is matched with an inner ring of the one-way clutch 22, and an outer ring of the one-way clutch 22 is connected with a transmission shell 24 (used for locking the rotation direction of the engine 1 in one direction and preventing the engine 1 from rotating in the reverse direction); a rotor shaft of the motor II 3 is connected with an inner hub of the brake II 8 and a sun gear II 9; the third sun gear 10 is connected with the inner hub of the first brake 7, and the outer hubs of the first brake 7 and the second brake 8 are integrally formed with the transmission housing 24 (i.e., both provided by the transmission housing 24); the short planet wheel 13 and the long planet wheel 14 are both connected with a planet carrier I11, a sun wheel III 10 is meshed with the short planet wheel 13, the short planet wheel 13 and a sun wheel II 9 are both meshed with the long planet wheel 14, the long planet wheel 14 is meshed with an outer ring gear I12, the outer ring gear I12 is connected with a clutch I5 and an outer hub of a clutch II 6, an inner hub of the clutch II 6 is connected with a transmission output shaft 19, an outer ring gear II 17 is fixedly connected with a transmission shell 24, a rotor shaft of a motor I4 is connected with a sun wheel I15, the planet carrier II 16 is connected with the transmission output shaft 19 and a transmission mechanism planet wheel 18 (the transmission output shaft 19 is connected with a rear-end speed reducing mechanism or a rear axle transmission mechanism of a vehicle and then reaches the wheel), the sun wheel I15 is meshed with the transmission mechanism planet wheel 18, and the transmission mechanism planet wheel 18 is meshed with the outer ring gear II 17; the stators of the second motor 3 and the first motor 4 are both mounted within the transmission housing 24.
The second embodiment is as follows: as shown in fig. 1, the first embodiment is further described, in which the first clutch 5 and the second clutch 6 share one outer hub, or the first clutch 5 and the second clutch 6 have respective outer hubs, and the two outer hubs are connected by a spline or by welding.
The third concrete implementation mode: as shown in fig. 1, the present embodiment is further described with respect to the first embodiment, and the hybrid vehicle drive train further includes a torsional damper 2 or a dual mass flywheel; the torsional damper 2 or the dual mass flywheel is connected between the transmission input shaft 23 and the crankshaft of the engine 1 (the one-way clutch 22 may also be provided between the torsional damper 2 and the engine 1), or the torsional damper 2 or the dual mass flywheel is connected between the transmission input shaft 23 and the carrier 11.
The fourth concrete implementation mode: as shown in fig. 1, the present embodiment is a hybrid vehicle drive transmission system according to any one of the first to third embodiments, which is capable of realizing the following operation modes: as shown in table 1:
table 1:
Figure BDA0003673259680000071
a first gear of a pure electric mode; the two clutches and the two brakes are disconnected, the engine 1 and the motor II 3 do not work, and the motor I4 works;
pure electric mode second gear; the first clutch 5 and the two brakes are disconnected, the second clutch 6 is combined, the engine 1 does not work, and the two motors work;
parallel mode first gear; the first clutch 5 and the second brake 8 are disconnected, the second clutch 6 and the first brake 7 are combined, the engine 1 works, and the two motors work;
a parallel mode second gear; the two clutches are combined, the two brakes are disconnected, the engine 1 works, and the two motors work;
parallel mode third gear; the first clutch 5 and the first brake 7 are disconnected, the second clutch 6 and the second brake 8 are combined, the engine 1 works, the second motor 3 does not work, and the first motor 4 works;
a series-parallel power splitting mode; the first clutch 5 and the two brakes are disconnected, the second clutch 6 is combined, and the engine 1 and the two motors work;
a series range extending mode; the second brake 8 and the two clutches are disconnected, the first brake 7 is combined, and the engine 1 and the two motors work;
a parking/parking power generation mode; the second brake 8 and the two clutches are disconnected, the first brake 7 is combined, the engine 1 and the second motor 3 work, and the first motor 4 does not work.
The fifth concrete implementation mode is as follows: as shown in fig. 1, the present embodiment is further described with respect to the fourth embodiment, and the power transmission path of the first pure electric mode (two clutches and two brakes are both off, the engine 1 and the motor two 3 are not operated, the motor one 4 is operated, and is realized by the speed change transmission mechanism 21) is as follows:
the power of the vehicle is provided by the operation of a first motor 4, the first motor 4 is fixedly connected with a first sun gear 15, a second outer gear ring 17 is fixed with a transmission shell 24, the first sun gear 15 is meshed with a planet gear 18 of a speed change transmission mechanism to transmit power, and the power is transmitted to a transmission output shaft 19 through a second planet carrier 16 to output the power (in the pure electric mode, the first motor 4 is subjected to primary speed reduction and can be connected with a rear-end speed reduction mechanism or a rear axle speed change mechanism of a wheel and then reaches the wheel of the vehicle, the working condition point of the first motor 4 is adjusted according to the vehicle speed and torque requirements of the vehicle to meet the vehicle requirements, so that the power performance of the vehicle can be improved;
the power transmission path of the pure electric mode second gear (the first clutch 5 and the two brakes are disconnected, the second clutch 6 is combined, the engine 1 does not work, and the two motors work) is as follows:
the second clutch 6 is combined, and the power of the vehicle is provided by the joint work of the first motor 4 and the second motor 3; the inner hub and the outer hub of the second clutch 6 are respectively connected with the transmission output shaft 19 and the outer gear ring I12, the inner ring of the one-way clutch 22 is connected with the planet carrier I11 (the reverse rotation of the planet carrier I can be prevented), the second motor 3 works to provide reverse rotating speed and torque, and power is provided (according to the running characteristic of the planet row of the power distribution mechanism) and is transmitted to the outer gear ring I12 through the second sun gear 9 and the long planet gears 14 and is transmitted to the transmission output shaft 19 through the second clutch 6; the first motor 4 is fixedly connected with the first sun gear 15, the second outer gear ring 17 is fixed with the transmission shell 24, the first motor 4 works, and power is transmitted to the transmission output shaft 19 through the second planet carrier 16 due to the fact that the first sun gear 15 is meshed with the planet gear 18 of the transmission mechanism to carry out power transmission; the power of the first external gear ring 12 and the second external gear ring 16 is transmitted in parallel at the output shaft 19 of the speed changer.
The difference between the pure electric mode first gear and the pure electric mode second gear is that; in the pure electric mode, only the first motor 4 works to drive the vehicle to run; pure electric mode second gear, two motors (motor one 4 and motor two 3) work jointly, drive the vehicle and travel, promote the dynamic nature and the acceleration nature of vehicle. When the pure electric mode is in the second gear, the second clutch 6 is in a combined state, but the engine 1 cannot be dragged and rotated passively under the action of the one-way clutch 22, so that the energy loss of the dragged operation of the engine 1 can be avoided. The first gear of the pure electric mode is the reason of switching of the subsequent working mode, starting control of the engine 1, transmission efficiency and the like, and the second motor 3 and the second clutch 6 can be actively controlled to be combined, namely the first gear of the pure electric mode is the same as the second gear of the pure electric mode, and the difference lies in that the second motor 3 provides torque and has different rotating speeds in the system.
The sixth specific implementation mode: as shown in fig. 1, the present embodiment is further explained for the fourth embodiment, and the power transmission path of the parallel mode first gear (the first clutch 5 and the second brake 8 are both off, the second clutch 6 and the first brake 7 are both on, the engine 1 is on, and both the electric machines are on) is as follows:
the third sun gear 10 is locked and cannot rotate due to the combination of the first brake 7; the engine 1 works, and the power of the engine 1 is transmitted to the long planet wheel 14 through the planet carrier I11; because the second motor 3 works, power is transmitted to the long planetary gear 14 through the second sun gear 9, the power of the engine 1 and the power of the second motor 3 are connected in parallel at the long planetary gear 14, and the power after parallel connection is transmitted to the output shaft 19 of the transmission through the first outer gear ring 12 and the second clutch 6 due to the combination of the second clutch 6; because the first motor 4 works, the power of the first motor 4 is transmitted to the planet gear 18 of the speed change transmission mechanism and the second planet carrier 16 through the first sun gear 15, the second planet carrier 16 transmits the power to the output shaft 19 of the speed changer, and the power of the first external gear ring 12 and the power of the second planet carrier 16 are connected in parallel at the output shaft 19 of the speed changer for power transmission;
the power transmission path of the parallel mode second gear (both clutches are engaged, both brakes are disengaged, the engine 1 is operated, and both motors are operated) is as follows:
the engine 1 and the two motors work, and the power of the engine 1 is transmitted to the long planetary wheel 14 through the planet carrier I11; because the second motor 3 works, the power of the second motor 3 is transmitted to the long planetary gear 14 through the second sun gear 9, and the power of the engine 1 and the power of the second motor 3 are connected in parallel at the long planetary gear 14 and are transmitted to the first outer gear ring 12; due to the combination of the first clutch 5, the planet carrier 11 is connected with the first external gear ring 12, and the power distribution mechanism 20 rotates at the same rotating speed; because the second clutch 6 is combined, the power after parallel connection is transmitted to the output shaft 19 of the transmission through the first external gear ring 12 and the second clutch 6; because the first motor 4 works, power is transmitted to the planetary gear 18 of the variable transmission mechanism and the second planet carrier 16 through the first sun gear 15, the second planet carrier 16 transmits the power to the output shaft 19 of the speed changer, and the power of the first external gear ring 12 and the power of the second planet carrier 16 are connected in parallel at the output shaft 19 of the speed changer for power transmission;
the power transmission path of the parallel mode third gear (the first clutch 5 and the first brake 7 are disconnected, the second clutch 6 and the second brake 8 are combined, the engine 1 works, the second motor 3 does not work, and the first motor 4 works) is as follows:
the second brake 8 is combined, and the second motor 3 and the second sun gear 9 are fixed; the engine 1 works, and the power of the engine 1 is transmitted to the outer gear ring I12 through the planet carrier I11 and the long planet wheel 14; because the second clutch 6 is combined, the power is transmitted to the output shaft 19 of the transmission through the first external gear ring 12 and the second clutch 6; because the first motor 4 works, the power of the first motor 4 is transmitted to the second planet carrier 16 through the first sun gear 15 and the planet gear 18 of the variable speed transmission mechanism, and the second planet carrier 16 transmits the power to the output shaft 19 of the transmission; the power of the first external gear ring 12 and the second planetary carrier 16 is transmitted in parallel at the output shaft 19 of the speed changer.
The differences of the parallel mode first gear, the parallel mode second gear and the parallel mode third gear are as follows: the power transmission path of the engine 1 is different, and the speed ratio of the engine 1 to the first outer ring gear 12 and the transmission output shaft 19 is different. By having different speed ratios, the corresponding speed ratio can be selected to meet the vehicle requirements, the working condition of the engine 1 is adjusted, and the engine 1 is in a better fuel consumption area.
The seventh embodiment: as shown in fig. 1, the present embodiment further describes the fourth embodiment, and the power transmission path in the series-parallel power split mode (the first clutch 5 and both brakes are off, the second clutch 6 is on, and both the engine 1 and both motors are on) is as follows;
the second motor 3 works with negative torque, and the torque of the engine 1 is transmitted to the power distribution mechanism 20 through the first planet carrier 11, wherein: a part of torque is transmitted to the long planet wheel 14 through the planet carrier I11, transmitted to the sun wheel II 9 through the long planet wheel 14 and transmitted to the motor II 3 through the sun wheel II 9 for power generation or driving; the other part of the torque is transmitted to the first external gear ring 12 through the first planet carrier 11, and the power is transmitted to the output shaft 19 of the transmission through the first external gear ring 12 and the second clutch 6 due to the combination of the second clutch 6; the motor I4 works, the power of the motor I4 is transmitted to the planet carrier II 16 through the sun gear I15 and the planet gear 18 of the variable speed transmission mechanism, and the planet carrier II 16 transmits the power to the output shaft 19 of the speed changer; the power of the first external gear ring 12 and the second planetary carrier 16 is jointly transmitted on the output shaft 19 of the transmission.
The second clutch 6 is combined, the engine 1 and the two motors work, and the rotating speed is shown in the following relations (one) and (two) according to the running characteristics of the planet row:
N S2 +λ·N R -(1+λ)N C either as 0 (one)
λ＝Z R /Z S (II)
Wherein: z R Number of teeth, Z, of outer ring gear one 12 S The number of teeth of the second sun gear 9, and λ is the speed ratio of the planetary row (i.e., the power split mechanism 20); n is a radical of R Rotational speed of the external gear ring one 12, N S2 Rotational speed of sun gear two 9, N C The rotating speed of the planet carrier I11;
the rotating speeds of the engine 1 and the motor II 3 can be known, and the rotating speeds of the outer gear ring I12 and the motor I4 can be known; or controlling the rotating speeds of the engine 1 and the first motor 4, and then the rotating speed of the second motor 3 can be known; according to the characteristics of the planetary row, the torque is expressed by the following relation (three):
T S2 :T R :T C 1: - (1+ λ) (three)
Namely, it is
Figure BDA0003673259680000111
Wherein: t is R Torque of the first external gear ring 12, T S2 Torque of sun gear two 9, T C Is the torque of the planet carrier one 11.
The torque of the engine 1 is distributed to the second sun gear 9 and the first external gear ring 12; because the torque generated by the engine 1 is always positive, as can be seen from the relations (three) and (four), the torque transmitted to the second motor 3 is in a negative direction and the value of the torque is in a certain proportional relation with the torque generated by the engine 1, so that the force of the planet row is balanced, that is, the second motor 3 needs to provide the torque in the negative direction and is in a certain proportional relation with the torque generated by the engine 1. The power split mode is also called as an ECVT mode because the rotation speed of the engine 1 is influenced by the rotation speed of the first motor 4 or the second motor 3, and the relative continuity relationship between the engine 1 and the vehicle speed is obtained.
In the present configuration, for the series-parallel mode, i.e., the power split mode, the vehicle demand and the rotational speed and torque adjustment control strategy of the engine 1 are summarized as follows: in general, the first motor 4 is used as a driving motor, and the second motor 3 is used as a generating motor; the required speed and the required torque of the vehicle are used as input quantities, the rotating speed of the first motor 4 can be calculated according to the rotating speed of each power source (the engine 1 and the two motors), the rotating speed of the engine 1 is preset according to a high-efficiency area, and the rotating speed of the second motor 3 can be calculated. The vehicle demand torque is formed by torques sent by the first motor 4 and the first engine 1 for the torques of all power sources, the first engine 1 transmits the first outer gear ring 12 and the output shaft 19 of the transmission, namely the vehicle side, through the planet row according to the preset torque of the high-efficiency area, and the second motor 3 provides the first motor 4 through the DC/DC converter after generating electricity.
The specific implementation mode is eight: as shown in fig. 1, the present embodiment further describes the fourth embodiment, and the power transmission path of the series range extending mode (the second brake 8 and both clutches are off, the first brake 7 is on, and both the engine 1 and both the motors are on) is as follows;
the engine 1 works, power is transmitted to the long planet wheel 14 and the short planet wheel 13 through the planet carrier I11, the long planet wheel 14 transmits the power to the sun wheel II 9, the power is transmitted to the motor II 3 through the sun wheel II 9 for power generation, electric energy is supplied to the motor I4, the motor I4 works, the power of the motor I4 is sequentially transmitted to the sun wheel I15, the variable speed transmission mechanism planet wheel 18 and the planet carrier II 16, and the planet carrier II 16 transmits the power to the transmission output shaft 19 for power transmission.
The power of the vehicle is mainly provided by the work of the motor I4, and the working condition of the engine 1 is adjusted according to the requirements of a whole vehicle energy strategy and the like, so that the engine 1 is in a better fuel consumption area; the engine 1 is controlled to work to drive the second motor 3 to generate electricity, and the first electric energy supply motor 4 is used for driving a vehicle and charging a battery.
The specific implementation method nine: as shown in fig. 1, the present embodiment further describes the fourth embodiment, the power transmission path of the parking/parking power generation mode (the second brake 8 and both clutches are off, the first brake 7 is on, both the engine 1 and the second motor 3 are on, and the first motor 4 is not on) is as follows;
when the vehicle is parked/stopped, the first brake 7 is combined, the engine 1 is started through the second motor 3 according to the motion characteristics of the power distribution mechanism 20 and the planetary gear train, after the engine 1 is started successfully, the power of the engine 1 is transmitted to the long planetary gear 14 and the short planetary gear 13 through the first planet carrier 11, the power is transmitted to the second sun gear 9 through the long planetary gear 14, the second sun gear 9 is connected with a rotor shaft of the second motor 3, the power is transmitted to the second motor 3 through the second sun gear 9 to run and generate power, and mechanical energy is converted into electric energy.
When the vehicle stops, the second motor 3 can be controlled to start the engine 1 according to the motion characteristics of the power distribution mechanism 20 and the planetary gear train, the second motor 3 is driven to operate to start working and generate power after the engine 1 is started, and electric energy is distributed to enter a battery system (external component) through an energy management system (external component) to realize the function of charging the battery. According to the safety strategy, the parking power generation mode can be selected when the vehicle is in the P gear.
In addition, the invention has a reverse mode: the invention does not set a mechanical reverse gear mode; under the selectable pure electric mode, according to the operating characteristic of the motor, the function of controlling the positive and negative rotation of the motor to realize the reverse gear of the vehicle is controlled.
Example 1:
as shown in fig. 2, the second embodiment discloses a second solution of a drive transmission system of a hybrid vehicle, and the difference between the first embodiment 1 and the first solution of the present invention is that the rotor shaft of the first motor 4 and the inner hub of the second clutch 6 are both connected to the first sun gear 15, and the other structural forms are the same as the first solution of the present invention.
The hybrid power vehicle driving transmission system can realize a single-motor pure electric mode, a double-motor pure electric mode, a series-parallel power split ECVT driving mode, an engine direct driving mode with three gears, a series range extending mode, parking power generation and other working modes, and can automatically realize the switching of different modes according to the SOC (residual electric quantity) value of a power battery and the vehicle speed requirement.
The invention realizes a plurality of driving working modes and has the advantages of simple structure, space saving, convenient arrangement, lower cost and the like; the working range of the engine 1 can be optimized through the planetary gear train of the power distribution mechanism, and the economy of the engine 1 and the oil consumption of the whole vehicle are improved; the pure electric mode, the single and double single machines work in two modes to provide good pure electric driving power performance for the vehicle; under the parallel and series-parallel modes, the engine 1 and the motor can simultaneously participate in driving, the dynamic property is improved, and the working range of the engine 1 is improved.
The above embodiments are merely illustrative of the present patent and do not limit the scope of the patent, and those skilled in the art can make modifications to the parts thereof without departing from the spirit and scope of the patent.

Claims (9)

1. A hybrid vehicle drive train system characterized by: comprises an engine (1), two motors, two clutches, two brakes, a power distribution mechanism (20), a variable speed transmission mechanism (21) and a one-way clutch (22); the power distribution mechanism (20) comprises a second sun gear (9), a third sun gear (10), a first planet carrier (11), a short planet gear (13), a long planet gear (14) and a first outer gear ring (12); the variable-speed transmission mechanism (21) comprises a first sun gear (15), a second planet carrier (16), a planetary gear (18) of the variable-speed transmission mechanism and a second external gear ring (17); the two motors are respectively a motor II (3) and a motor I (4); the two clutches are a first clutch (5) and a second clutch (6) respectively; the two brakes are a brake I (7) and a brake II (8) respectively;
a crankshaft of the engine (1) is connected with a transmission input shaft (23), and the transmission input shaft (23) is connected with the planet carrier I (11); the planet carrier I (11) is connected with an inner hub of the clutch I (5), the planet carrier I (11) is matched with an inner ring of the one-way clutch (22), and an outer ring of the one-way clutch (22) is connected with the transmission shell (24); a rotor shaft of the motor II (3) is connected with an inner hub of the brake II (8) and a sun gear II (9); the sun gear III (10) is connected with an inner hub of the brake I (7), and outer hubs of the brake I (7) and the brake II (8) are integrated with a transmission shell (24); the short planet wheel (13) and the long planet wheel (14) are both connected with the planet carrier I (11), the sun wheel III (10) is meshed with the short planet wheel (13), the short planet wheel (13) and the sun wheel II (9) are both meshed with the long planet wheel (14), the long planet wheel (14) is meshed with the outer gear ring I (12), the outer gear ring I (12) is connected with the outer hubs of the clutch I (5) and the clutch II (6), the inner hub of the clutch II (6) is connected with the transmission output shaft (19), the outer gear ring II (17) is fixedly connected with the transmission shell (24), the rotor shaft of the motor I (4) is connected with the sun wheel I (15), the planet carrier II (16) is connected with the transmission output shaft (19) and the transmission mechanism planet wheel (18), the sun wheel I (15) is meshed with the transmission mechanism planet wheel (18), and the transmission mechanism planet wheel (18) is meshed with the outer gear ring II (17); stators of the second motor (3) and the first motor (4) are both arranged in the transmission shell (24).
2. A hybrid vehicle drive train as set forth in claim 1, wherein: the first clutch (5) and the second clutch (6) share one outer hub, or the first clutch (5) and the second clutch (6) respectively have respective outer hubs which are connected through a spline or a welding mode.
3. A hybrid vehicle drive train as set forth in claim 1, wherein: the hybrid vehicle drive train further comprises a torsional damper (2) or a dual mass flywheel; the torsional damper (2) or the dual mass flywheel is connected between the transmission input shaft (23) and a crankshaft of the engine (1), or the torsional damper (2) or the dual mass flywheel is connected between the transmission input shaft (23) and the planet carrier (11).
4. A hybrid vehicle drive train as set forth in any one of claims 1-3, wherein: the hybrid vehicle drive transmission system can realize the following working modes:
a first gear of a pure electric mode; the two clutches and the two brakes are disconnected, the engine (1) and the motor II (3) do not work, and the motor I (4) works;
pure electric mode second gear; the first clutch (5) and the two brakes are disconnected, the second clutch (6) is combined, the engine (1) does not work, and the two motors work;
parallel mode first gear; the first clutch (5) and the second brake (8) are disconnected, the second clutch (6) and the first brake (7) are combined, the engine (1) works, and the two motors work;
a parallel mode second gear; the two clutches are combined, the two brakes are disconnected, the engine (1) works, and the two motors work;
parallel mode third gear; the first clutch (5) and the first brake (7) are disconnected, the second clutch (6) and the second brake (8) are combined, the engine (1) works, the second motor (3) does not work, and the first motor (4) works;
a series-parallel power splitting mode; the first clutch (5) and the two brakes are disconnected, the second clutch (6) is combined, and the engine (1) and the two motors work;
a series range extending mode; the second brake (8) and the two clutches are disconnected, the first brake (7) is combined, and the engine (1) and the two motors work;
a parking/parking power generation mode; the second brake (8) and the two clutches are disconnected, the first brake (7) is combined, the engine (1) and the second motor (3) work, and the first motor (4) does not work.
5. A hybrid vehicle drive train as set forth in claim 4, wherein: the power transmission path of the first gear of the pure electric mode is as follows:
the power of the vehicle is provided by the operation of a first motor (4), the first motor (4) is fixedly connected with a first sun gear (15), a second outer gear ring (17) is fixed with a transmission shell (24), the first sun gear (15) is meshed with a planetary gear (18) of a speed change transmission mechanism to carry out power transmission, and the power is transmitted to a transmission output shaft (19) through a second planetary carrier (16) to carry out power output;
the power transmission path of the pure electric mode second gear is as follows:
the second clutch (6) is combined, and the power of the vehicle is provided by the joint work of the first motor (4) and the second motor (3); the inner hub and the outer hub of the second clutch (6) are respectively connected with a transmission output shaft (19) and the first outer gear ring (12), the inner ring of the one-way clutch (22) is connected with the first planet carrier (11), the second motor (3) works to provide reverse rotating speed and torque, power is provided and transmitted to the first outer gear ring (12) through the second sun gear (9) and the long planet gear (14), and is transmitted to the transmission output shaft (19) through the second clutch (6); the first motor (4) is fixedly connected with the first sun gear (15), the second outer gear ring (17) is fixed with the transmission shell (24), the first motor (4) works, and power is transmitted to the output shaft (19) of the transmission through the second planet carrier (16) as the first sun gear (15) is meshed with the planet gear (18) of the transmission mechanism to transmit power; the power of the first external gear ring (12) and the second planet carrier (16) is transmitted in parallel at the output shaft (19) of the speed changer.
6. A hybrid vehicle drive train as set forth in claim 4, wherein: the power transmission path of the parallel mode first gear is as follows:
the sun gear III (10) is locked and cannot rotate due to the combination of the brake I (7); the engine (1) works, and the power of the engine (1) is transmitted to the long planet wheel (14) through the planet carrier I (11); because the second motor (3) works, power is transmitted to the long planetary wheel (14) through the second sun gear (9), the power of the engine (1) and the power of the second motor (3) are connected in parallel at the long planetary wheel (14), and because the second clutch (6) is combined, the power after being connected in parallel is transmitted to the output shaft (19) of the speed changer through the first outer gear ring (12) and the second clutch (6); because the first motor (4) works, the power of the first motor (4) is transmitted to a planet wheel (18) and a second planet carrier (16) of the variable-speed transmission mechanism through the first sun wheel (15), the second planet carrier (16) transmits the power to a transmission output shaft (19), and the power of the first outer gear ring (12) and the second planet carrier (16) is connected in parallel at the transmission output shaft (19) for power transmission;
the power transmission path of the parallel mode second gear is as follows:
the engine (1) and the two motors work, and the power of the engine (1) is transmitted to the long planet wheel (14) through the planet carrier I (11); because the second motor (3) works, the power of the second motor (3) is transmitted to the long planetary gear (14) through the second sun gear (9), and the power of the engine (1) and the power of the second motor (3) are connected in parallel at the long planetary gear (14) and are transmitted to the first outer gear ring (12); due to the combination of the first clutch (5), the planet carrier (11) is connected with the first external gear ring (12), and the power distribution mechanism (20) rotates at the same rotating speed; because the second clutch (6) is combined, the power after parallel connection is transmitted to the output shaft (19) of the transmission through the first outer gear ring (12) and the second clutch (6); because the motor I (4) works, power is transmitted to the planet gear (18) and the planet carrier II (16) of the variable-speed transmission mechanism through the sun gear I (15), the planet carrier II (16) transmits the power to the output shaft (19) of the transmission, and the power of the outer gear ring I (12) and the power of the planet carrier II (16) are connected in parallel at the output shaft (19) of the transmission for power transmission;
the power transmission path of the parallel mode third gear is as follows:
the second brake (8) is combined, and the second motor (3) and the second sun gear (9) are fixed; the engine (1) works, and the power of the engine (1) is transmitted to the outer gear ring I (12) through the planet carrier I (11) and the long planet wheel (14); because the second clutch (6) is combined, power is transmitted to the output shaft (19) of the transmission through the first external gear ring (12) and the second clutch (6); because the first motor (4) works, the power of the first motor (4) is transmitted to the second planet carrier (16) through the first sun gear (15) and the planet gear (18) of the variable speed transmission mechanism, and the second planet carrier (16) transmits the power to the output shaft (19) of the transmission; the power of the first external gear ring (12) and the second planet carrier (16) is connected in parallel at the output shaft (19) of the speed changer for power transmission.
7. A hybrid vehicle drive train as set forth in claim 4, wherein: the power transmission path in the series-parallel power split mode is as follows;
the second motor (3) works with negative torque, and the torque of the engine (1) is transmitted to the power distribution mechanism (20) through the first planet carrier (11), wherein: a part of torque is transmitted to the long planet wheel (14) through the planet carrier I (11), transmitted to the sun wheel II (9) through the long planet wheel (14) and transmitted to the motor II (3) through the sun wheel II (9) for power generation or driving; the other part of torque is transmitted to the first external gear ring (12) through the first planet carrier (11), and power is transmitted to the output shaft (19) of the transmission through the first external gear ring (12) and the second clutch (6) due to the combination of the second clutch (6); the motor I (4) works, the power of the motor I (4) is transmitted to the planet carrier II (16) through the sun gear I (15) and the planet gear (18) of the variable speed transmission mechanism, and the planet carrier II (16) transmits the power to the output shaft (19) of the transmission; the power of the first external gear ring (12) and the second planet carrier (16) is transmitted together at the output shaft (19) of the speed changer.
8. A hybrid vehicle drive train as set forth in claim 4, wherein: the power transmission path in the series range extending mode is as follows;
the engine (1) works, power is transmitted to the long planet wheel (14) and the short planet wheel (13) through the planet carrier I (11), the long planet wheel (14) transmits the power to the sun wheel II (9), the power is transmitted to the motor II (3) through the sun wheel II (9) for power generation, electric energy is supplied to the motor I (4), the motor I (4) works, the power of the motor I (4) is sequentially transmitted to the sun wheel I (15), the variable speed transmission mechanism planet wheel (18) and the planet carrier II (16), and the planet carrier II (16) transmits the power to the transmission output shaft (19) for power transmission.
9. A hybrid vehicle drive train as set forth in claim 4, wherein: the power transmission path in the parking/parking power generation mode is as follows;
when the vehicle is parked/parked, the brake I (7) is combined, the engine (1) is started through the motor II (3), after the engine (1) is started successfully, power of the engine (1) is transmitted to the long planet wheel (14) and the short planet wheel (13) through the planet carrier I (11), the long planet wheel (14) transmits the power to the sun wheel II (9), the sun wheel II (9) is connected with a rotor shaft of the motor II (3), the power is transmitted to the motor II (3) through the sun wheel II (9) to rotate and generate power, and mechanical energy is converted into electric energy.
CN202210615632.3A 2022-05-31 2022-05-31 Driving transmission system of hybrid power vehicle Pending CN114953968A (en)

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