CN110385977B - Double-planet-row double-mode hybrid electric vehicle driving system configuration and vehicle - Google Patents
Double-planet-row double-mode hybrid electric vehicle driving system configuration and vehicle Download PDFInfo
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- CN110385977B CN110385977B CN201910636306.9A CN201910636306A CN110385977B CN 110385977 B CN110385977 B CN 110385977B CN 201910636306 A CN201910636306 A CN 201910636306A CN 110385977 B CN110385977 B CN 110385977B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/36—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings
- B60K6/365—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings with the gears having orbital motion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
- B60K6/44—Series-parallel type
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/62—Hybrid vehicles
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
The invention discloses a double-planet-row dual-mode hybrid electric vehicle driving system structure and a vehicle, wherein the structure comprises an engine, a torsional vibration damper, a first connecting shaft, a first clutch, a second connecting shaft, a first brake, a first planet row, a second clutch, a second brake, a first motor, a second motor and an output gear; the first planet row comprises a first sun gear, a first planet carrier and a first gear ring; the second planet row comprises a second sun gear, a second planet carrier and a second gear ring; the first sun gear is connected with the second gear ring through a second clutch and is also fixedly connected with the first motor; the first gear ring is connected with the second connecting shaft; the first planet carrier is connected with the second planet carrier, and the second planet carrier is connected with the output gear; the second gear ring is connected with the frame through a second brake; and the second sun gear is connected with a second motor.
Description
Technical Field
The invention relates to the technical field of hybrid electric vehicle driving systems, in particular to a double-planet-row dual-mode hybrid electric vehicle driving system configuration and a vehicle.
Background
With the increasing development of energy crisis and the increasing deterioration of ecological environment, energy conservation and environmental protection become two major topics of attention in the current automobile industry, and thus various new energy automobiles come into operation. At present, fuel cell vehicles and pure electric vehicles are limited by problems of cost, endurance, battery electrolyte pollution and the like, and cannot be popularized in a large range temporarily, and hybrid vehicles become the optimal choice of current vehicle manufacturers by virtue of the advantages of relatively mature technology, good dynamic property, fuel economy and the like.
At present, hybrid power systems can be divided into three structures, namely series, parallel and series-parallel. In all series-parallel structures, the power split hybrid system which uses the planetary gear mechanism as the power coupling device is the most popular. The power split type hybrid power system mainly comprises a planetary gear mechanism and two combined motors. According to the configuration characteristics of the hybrid power system, the power split hybrid power system can realize the complete decoupling of the working point of the engine and the wheels, and the engine stably works in a high-efficiency interval to output power through the speed regulation function of one motor and the torque compensation of the other motor, so that the electronic stepless speed change is realized, and the overall fuel economy of the automobile is improved.
As early as the 90 s of the last century, foreign automobile manufacturers have begun to research power split hybrid automobiles. The most well-known of these is the single mode hybrid system of mocha corpa and the general dual mode hybrid system. The Toyota single-mode hybrid power system adopts a single planet row as a power coupling mechanism, the power assembly is relatively simple in arrangement, but the power circulation phenomenon can occur under the high-speed working condition, so that the energy is repeatedly converted and lost. In order to overcome the power circulation phenomenon of the high-speed working condition of the single-mode hybrid power system of Toyota, the number of power splitting mechanical points is increased by increasing the number of the planetary rows and the number of the clutches, so that the probability of power circulation under the high-speed working condition is reduced, and the complexity and the control difficulty of the whole power distribution mechanism are increased.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a double-planet-row double-mode hybrid electric vehicle driving system configuration and a vehicle, which can improve the efficiency of the hybrid electric vehicle driving system on the basis of reducing the complexity of the configuration and the control difficulty, so that an engine runs in a high-efficiency interval, and the fuel economy of the whole vehicle is improved.
The technical scheme of the driving system configuration of the double-planet-row double-mode hybrid electric vehicle provided by the invention on the one hand is as follows:
a double-planet-row double-mode hybrid electric vehicle driving system structure comprises an engine, a torsional vibration damper, a first connecting shaft, a first clutch, a second connecting shaft, a first brake, a first planet row, a second clutch, a second brake, a first motor, a second motor and an output gear;
an output shaft of the engine is connected with the torsional vibration damper, one end of the first connecting shaft is connected with the torsional vibration damper, and the other end of the first connecting shaft is connected with a driving part of the first clutch; the driven part of the first clutch is connected with the second connecting shaft, and the first brake is arranged on the second connecting shaft;
the first planet row comprises a first sun gear, a first planet carrier and a first gear ring; the second planet row comprises a second sun gear, a second planet carrier and a second gear ring;
the first sun gear is connected with the second gear ring through a second clutch and is also fixedly connected with the first motor; the first gear ring is connected with the second connecting shaft; the first planet carrier is connected with the second planet carrier, and the second planet carrier is connected with the output gear; the second gear ring is connected with the frame through a second brake; and the second sun gear is connected with a second motor.
Further, the output gear is connected with a differential; the first and second motors are also connected to a battery through a power converter.
Further, the double-planet-row double-mode hybrid electric vehicle driving system comprises a pure electric state in which the first clutch is in a separated state, the second clutch is in a separated state, the first brake is in an engaged state, the second brake is in an engaged state, and the output gear obtains power of the second motor through the second planet carrier and the second sun gear to drive the wheels to run.
Further, the double-planet-row double-mode hybrid electric vehicle driving system comprises a pure electric state that the second clutch is in joint, the first brake is in joint, the first clutch is in separation, the second brake is in separation, the output gear obtains the power of the second motor through the second planet carrier and the second sun gear, and the power of the first motor drives the wheels to run through the second planet carrier, the second gear ring and the first sun gear.
Furthermore, the double-planet-row double-mode hybrid electric vehicle driving system comprises a pure engine state in which the first clutch is engaged, the second brake is engaged, the first brake is disengaged, and the output gear obtains the power of the engine through the second planet carrier, the first planet carrier, the second connecting shaft, the first connecting shaft and the torsional damper to drive the wheels to run.
Furthermore, the configuration of the double-planet-row double-mode hybrid electric vehicle driving system comprises a split state of input power, wherein the first clutch is in a joint state, the second brake is in a joint state, the second clutch is in a separated state, the first brake is in a separated state, the first motor obtains the electric power of the engine through the first sun gear, the first planet carrier and the first gear ring to generate electric energy to be supplied to the second motor, and the output gear obtains the power of the engine and the second motor through the second planet carrier, the first planet carrier and the first gear ring to drive wheels to run.
Furthermore, the double-planet-row double-mode hybrid electric vehicle driving system comprises a compound power split state in which the first clutch is in a joint state, the second clutch is in a joint state, the first brake is in a separation state, the second brake is in a separation state, the output gear ring passes through the second planet carrier, the first planet carrier and the first gear ring, and the second planet carrier, the second gear ring, the first sun gear, the first planet carrier and the first gear ring to obtain the power of the engine to drive the wheels to run, and the first motor obtains the power of the engine through the first sun gear, the first planet carrier and the first gear ring to drive the second motor to run.
Further, the double-planet-row double-mode hybrid electric vehicle driving system configuration comprises a regenerative braking state that a first brake is engaged, a second brake is engaged, a first clutch is disengaged, a second clutch is disengaged, and a second motor obtains the power of wheels through a second sun gear, a second planet carrier and an output gear to generate electricity.
Further, the double-planet-row double-mode hybrid electric vehicle driving system comprises a parking charging state in which the first brake is in a separated state, the second clutch is in a separated state, the first clutch is in an engaged state, and the first motor obtains the power of the engine through the first sun gear, the first planet carrier and the first gear ring to generate electricity.
The technical scheme of the automobile provided by the invention on the one hand is as follows:
an automobile comprises the double-planet-row double-mode hybrid electric automobile driving system configuration.
Through the technical scheme, the invention has the beneficial effects that:
(1) the invention can realize two pure electric modes, a pure engine mode, two combined driving modes, a regenerative braking mode and a parking charging mode, so as to meet the dynamic requirements under different driving conditions and improve the fuel economy of the whole vehicle.
(2) According to the invention, the working states of the two planet rows, the two brakes and the two clutches are controlled in a combined manner, so that the requirements of different torques in a pure electric mode are met, the size and the weight of the motor are reduced, and the motor can operate in a high-efficiency interval.
(3) Compared with a single-mode hybrid power system, the invention can realize a plurality of mechanical points, shorten the transmission ratio range of power circulation of the single-mode at high speed and realize high-efficiency operation under high-speed working conditions.
(4) The two motors are positioned at the end far away from the engine, so that the influence of the working temperature of the motors on the output power of the motors is avoided.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the application and not to limit the invention.
FIG. 1 is a schematic structural diagram of a double-planet-row and double-mode hybrid electric vehicle driving system configuration in an embodiment of the invention;
FIG. 2 is a schematic diagram of the lever model of FIG. 1;
FIG. 3 is a power transmission schematic of electric-only mode 1 in an embodiment of the present invention;
FIG. 4 is a schematic power transmission diagram for electric-only mode 2 in an embodiment of the present invention;
FIG. 5 is a schematic power transmission diagram of a pure engine in an embodiment of the present invention;
FIG. 6 is a schematic power transmission diagram of combination drive mode 1 in an embodiment of the present invention;
FIG. 7 is a schematic power transmission diagram of combination drive mode 2 in an embodiment of the present invention;
FIG. 8 is a power transmission schematic of a regenerative braking mode in an embodiment of the present invention;
FIG. 9 is a power transmission schematic of a park charge mode in an embodiment of the present invention;
the planetary gear train comprises an engine 1, an engine 2, a first planet row 3, a torsional vibration damper 4, a first connecting shaft 5, a first clutch 6, a second connecting shaft 7, a first brake 8, a first sun gear 9, a first planet carrier 10, a first gear ring 11, a second clutch 12, a second brake 13, a second gear ring 14, a second planet carrier 15, a second sun gear 16, a first motor 17, a second motor 18, an output gear 19 and a differential.
Detailed Description
The invention is further described with reference to the following figures and examples.
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
One or more embodiments provide a dual-planetary-row dual-mode hybrid electric vehicle drive system configuration. Fig. 1 is a schematic configuration diagram of a double-planet-row double-mode hybrid electric vehicle driving system, and fig. 2 is a simplified schematic diagram of a lever model of fig. 1.
Referring to fig. 1, the configuration of the dual-planetary-row dual-mode hybrid electric vehicle driving system provided by the embodiment includes an engine 1, a torsional vibration damper 3, a first connecting shaft 4, a first clutch 5, a second connecting shaft 6, a first brake 7, a first planetary row 2, a second planetary row, a second clutch 11, a second brake 12, a first electric machine 16, a second electric machine 17, an output gear 18 and a differential 19.
Specifically, the output shaft of the engine 1 is connected with the torsional vibration damper 3, one end of the first connecting shaft 4 is connected with the torsional vibration damper 3, the other end of the first connecting shaft is connected with the driving part of the first clutch 5, and the output shaft of the engine 1 transmits the engine power to the first connecting shaft 4 through the torsional vibration damper 3; one end of the second connecting shaft 6 is connected with the driven part of the first clutch 5, and the other end is connected with the first gear ring 10 of the first planet row 2; the first brake 7 is mounted on the second connecting shaft 6, and the driven part of the first clutch 5 is also connected to the first ring gear 10 of the first planetary gear set 2 via the first brake 7.
The first planetary row 2 comprises a first sun gear 8, a first planet carrier 9 and a first ring gear 10; the second planetary row comprises a second sun gear 15, a second planet carrier 14 and a second ring gear 13.
The first sun gear 8 is connected with a second gear ring 13 through a second clutch 11, and the first sun gear 8 is also fixedly connected with a first motor 16; the first gear ring 10 is connected with the first connecting shaft 4 sequentially through a first brake 7 and a first clutch 5; the first planet carrier 9 is used as a power output end of the first planet row and is connected with the second planet carrier 14 through an output shaft at the tail end of the first planet row, and the second planet carrier is used as a power output end of the second planet row and is fixedly connected with an output gear; the output gear is connected with the differential mechanism, and transmits power to the wheels of the automobile to drive the automobile to run; the output gear 18 is connected with a differential 19; the second gear ring 13 is connected with the frame through a second brake 12, so that the second gear ring is braked or unlocked; the second sun gear 15 is connected to a second motor 17.
In this embodiment, the first electric machine 16 and the second electric machine 17 are both permanent magnet synchronous machines integrating a motor and a generator, and can exchange energy with a battery of an energy storage device through a power converter in different operating modes, and when the battery energy is low, energy needs to be supplemented from the electric machines, and when the battery energy is high, energy can be provided to the electric machines.
As shown in fig. 3 to 9, the dual-planetary-row dual-mode hybrid electric vehicle driving system configuration provided by the embodiment can realize two pure electric modes, a pure engine mode, two combined driving modes, a regenerative braking mode and a parking charging mode by controlling the working states of the two planetary rows, the two brakes and the two clutches in a combined manner.
Referring to fig. 3, when the dual-planetary-row dual-mode hybrid electric vehicle driving system configuration is in the pure electric mode 1, the corresponding driving condition is a low-speed high-torque starting or medium-low-speed working condition. In the pure electric mode 1, the first clutch 5 and the second clutch 11 are both in a disengaged state, the first brake 7 and the second brake 12 are both in an engaged state, at this time, the engine 1 and the first motor 16 are not operated, and only the second motor 17 drives the automobile to run. At this time, the power of the second motor 17 is transmitted to the second carrier 14 along the second sun gear 15 of the second planetary gear set, and the power is transmitted to the wheels through the output gear 18 engaged therewith, thereby driving the vehicle to run.
Referring to fig. 4, the configuration of the dual-planetary-row dual-mode hybrid electric vehicle driving system provided in this embodiment is in the pure electric mode 2, and the corresponding driving condition is a medium-high speed or a rapid acceleration condition. In the pure electric mode 2, the second clutch 11 and the first brake 7 are both in an engaged state, the first clutch 5 and the second brake 12 are both in a disengaged state, at this time, the engine 1 does not work, and the first motor 16 and the second motor 17 jointly drive the automobile to run. At this time, the power of the second motor 17 is transmitted to the second carrier 14 along the second sun gear 15 of the second planetary row, and at the same time, the power of the first motor 16 is transmitted to the second carrier 14 along one path along the first sun gear 8 and the first carrier 9 of the first planetary row, and the other path is transmitted to the second carrier 14 along the first sun gear 8 and the second ring gear 13, and is combined with the power transmitted by the second motor 17 and transmitted to the output gear 18 engaged therewith, so that the automobile is driven to run together.
Referring to fig. 5, the configuration of the dual-planetary-row dual-mode hybrid electric vehicle driving system provided by the embodiment is under a pure engine. The corresponding running working condition at this moment is a working condition with medium-high speed and sufficient battery electric quantity. In the engine-only working mode, the first clutch 5, the second clutch 11 and the second brake 12 are all in an engaged state, the first brake 7 is in a disengaged state, at the moment, the first motor 16 and the second motor 17 are not in operation, and only the engine 1 is in operation. At this time, the power of the engine 1 is transmitted to the meshed output gear 18 via the output shaft thereof, the torsional damper 3, the first connecting shaft 4, the second connecting shaft 6, the first ring gear 10, the first carrier 9, and the second carrier 14, thereby driving the wheels.
The joint driving mode can be divided into an input power splitting mode and a composite power splitting mode.
Referring to fig. 6, the driving system configuration of the dual-planetary-row dual-mode hybrid electric vehicle according to the embodiment is in the input power split mode of the combined driving. At the moment, the corresponding running working condition is a working condition with medium-low speed, large load and low battery power. In the input power split mode, the first clutch 5 and the second brake 12 are in an engaged state, and the second clutch 11 and the first brake 7 are in a disengaged state. At this time, the engine 1 is operated, the first electric machine 16 is in a generator state, and the second electric machine 17 is in a motor state. A part of the power of the engine 1 is transmitted to the first electric machine 16 through the first ring gear 10, the first carrier 9 and the first sun gear 8, and drives the first electric machine 16 to generate electric power, and the generated electric power is supplied to the second electric machine 17. Another part of the power of the engine 1 passes through the first ring gear 10, the first carrier 9 and the second carrier 14, and then is transmitted to the output gear 18 together with the power of the second motor 17, and the output gear 18 is fixedly connected to the differential 19, and transmits the power to the driving wheels.
Referring to fig. 7, the configuration of the dual-planetary-row dual-mode hybrid electric vehicle driving system provided in this embodiment is in a combined power split mode of combined driving, and at this time, the corresponding driving condition is a high-speed large-load condition and a low battery power condition. In the compound power split mode, the first clutch 5 and the second clutch 11 are engaged, the first brake 7 and the second brake 12 are disengaged, the engine 1 is operated, the second electric machine 17 is operated as a generator when the first electric machine 16 drives the vehicle to run, and the first electric machine 16 is operated as a generator when the second electric machine 17 drives the vehicle to run. Fig. 7 is a power transmission diagram when the first electric machine 16 is a generator and the second electric machine 17 is a motor. One part of the power of the engine 1 is transmitted to the second planet carrier 14 and then transmitted to the wheels through the output gear 18, the other part of the power is transmitted to the first sun gear 8 after passing through the first gear ring 10 and the first planet carrier, the power transmitted to the first sun gear 8 is split, one part of the power drives the first motor 16 to generate power and drive the second motor 17, and the other part of the power is transmitted to the second planet carrier 14 through the second gear ring 13 and then transmitted to the wheels through the output gear 18.
Referring to fig. 8, the configuration of the dual-planetary-row dual-mode hybrid electric vehicle driving system provided in this embodiment is in a regenerative braking mode, and at this time, the corresponding driving condition is a deceleration braking condition. In the regenerative braking mode, the first brake 7 and the second brake 12 are engaged, the first clutch 5 and the second clutch 11 are disengaged, and the engine 1 and the first electric machine 16 are not operated, and the second electric machine 17 generates electric power as a generator to store the electric power in the battery. The power is transmitted from the wheels to the second planet carrier 14 through the output gear 18, and then transmitted to the second motor 17 through the second sun gear 15, so as to drive the second motor 17 to generate electricity, and then the mechanical energy is converted into electric energy through the power converter, and the electric energy is stored in the battery.
Referring to fig. 9, the configuration of the dual-planetary-row dual-mode hybrid electric vehicle driving system provided in this embodiment is in a parking charging mode, where the corresponding driving condition is a parking and low battery level condition. In the parking charging mode, the first brake 7, the second brake 12, and the second clutch 11 are all in the disengaged state, and the first clutch is in the engaged state. At this time, the engine 1 is operated, the second electric machine 17 is not operated, and the first electric machine 16 is in a generator state, and stores electric energy in the battery. The power of the engine is transmitted to the first sun gear 8 through the first gear ring 10 and the first planet carrier 9, and drives the first motor 16 to generate electricity, so that the mechanical energy is converted into electric energy to be stored in the battery.
From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:
(1) the electric vehicle can realize two pure electric modes, a pure engine mode, two combined driving modes, a regenerative braking mode and a parking charging mode so as to meet the dynamic requirements under different driving conditions and improve the fuel economy of the whole vehicle.
(2) Through the operating condition of two planet rows, two brakers and two clutches of combination control, not only satisfied the demand of different moments of torsion under the pure electric mode, reduced the size and the weight of motor simultaneously to let the motor operation at the high efficiency interval.
(3) Compared with a single-mode hybrid power system, the single-mode hybrid power system can realize a plurality of mechanical points, shortens the transmission ratio range of the single-mode with power circulation at high speed, and realizes high-efficiency operation under high-speed working conditions.
(4) The two motors are positioned at the end far away from the engine, so that the influence of the working temperature of the motors on the engine to the output power of the motors is avoided.
One or more embodiments also provide an automobile comprising a dual-planetary-row, dual-mode hybrid vehicle drive system configuration.
The specific structure of the configuration of the dual-planetary-row dual-mode hybrid electric vehicle driving system of this embodiment refers to the related description of the previous embodiments, and is not described herein again.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (8)
1. A double-planet-row double-mode hybrid electric vehicle driving system configuration is characterized by comprising an engine, a torsional vibration damper, a first connecting shaft, a first clutch, a second connecting shaft, a first brake, a first planet row, a second clutch, a second brake, a first motor, a second motor and an output gear;
an output shaft of the engine is connected with the torsional vibration damper, one end of the first connecting shaft is connected with the torsional vibration damper, and the other end of the first connecting shaft is connected with a driving part of the first clutch; the driven part of the first clutch is connected with the second connecting shaft, and the first brake is arranged on the second connecting shaft;
the first planet row comprises a first sun gear, a first planet carrier and a first gear ring; the second planet row comprises a second sun gear, a second planet carrier and a second gear ring;
the first sun gear is connected with the second gear ring through a second clutch and is also fixedly connected with the first motor; the first gear ring is connected with the second connecting shaft; the first planet carrier is connected with the second planet carrier, and the second planet carrier is connected with the output gear; the second gear ring is connected with the frame through a second brake; the second sun gear is connected with a second motor;
the output gear is connected with the differential; the first motor and the second motor are also connected with a battery through a power converter;
the double-planet-row double-mode hybrid electric vehicle driving system comprises a pure engine state in which the first clutch is in joint, the second brake is in joint, the first brake is in separation, and the output gear obtains power of the engine through the second planet carrier, the first planet carrier, the second connecting shaft, the first connecting shaft and the torsional vibration damper to drive wheels to run.
2. The dual-planetary-row dual-mode hybrid electric vehicle driving system configuration as claimed in claim 1, wherein the dual-planetary-row dual-mode hybrid electric vehicle driving system configuration comprises a pure electric state in which the first clutch is in a separated state, the second clutch is in a separated state, the first brake is in an engaged state, the second brake is in an engaged state, and the output gear obtains power of the second motor through the second planet carrier and the second sun gear to drive the wheels to run.
3. The dual-planet-row dual-mode hybrid electric vehicle driving system configuration of claim 1, wherein the dual-planet-row dual-mode hybrid electric vehicle driving system configuration comprises a pure electric state in which the second clutch is in engagement, the first brake is in engagement, the first clutch is in disengagement, the second brake is in disengagement, the output gear obtains power of the second motor through the second planet carrier and the second sun gear, and the power of the first motor is obtained through the second planet carrier, the second gear ring and the first sun gear to drive wheels to run.
4. The dual-planetary-row dual-mode hybrid electric vehicle driving system configuration as claimed in claim 1, wherein the dual-planetary-row dual-mode hybrid electric vehicle driving system configuration comprises a state that the first clutch is engaged, the second brake is engaged, the second clutch is disengaged, the first brake is disengaged, the first motor obtains electric power of the engine through the first sun gear, the first planet carrier and the first gear ring to generate electric energy to be supplied to the second motor, and the output gear obtains an input power split state that the power of the engine and the second motor drives wheels to run through the second planet carrier, the first planet carrier and the first gear ring.
5. The dual-planet-row dual-mode hybrid electric vehicle driving system configuration of claim 1, wherein the dual-planet-row dual-mode hybrid electric vehicle driving system configuration comprises a composite power split state that the first clutch is in a joint state, the second clutch is in a joint state, the first brake is in a separation state, the second brake is in a separation state, the output gear ring passes through the second planet carrier, the first planet carrier and the first gear ring, and obtains power of the engine to drive wheels to run through the second planet carrier, the second gear ring, the first sun gear, the first planet carrier and the first gear ring, and the first motor obtains power of the engine to generate power to drive the second motor to run through the first sun gear, the first planet carrier and the first gear ring.
6. The dual-planetary-row dual-mode hybrid electric vehicle driving system configuration as claimed in claim 1, wherein the dual-planetary-row dual-mode hybrid electric vehicle driving system configuration comprises a regenerative braking state in which a first brake is engaged, a second brake is engaged, a first clutch is disengaged, a second clutch is disengaged, and a second motor obtains the power of wheels through a second sun gear, a second planet carrier and an output gear to generate electricity.
7. The dual-planet-row dual-mode hybrid electric vehicle driving system configuration of claim 1, wherein the dual-planet-row dual-mode hybrid electric vehicle driving system configuration comprises a parking charging state in which a first brake is in a disengaged state, a second clutch is in a disengaged state, a first clutch is in an engaged state, and a first motor obtains power of an engine through a first sun gear, a first planet carrier and a first gear ring to generate electricity.
8. An automobile comprising the dual-planetary-row dual-mode hybrid electric vehicle drive system configuration of any one of claims 1 to 7.
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| CN112659881A (en) * | 2021-01-04 | 2021-04-16 | 重庆大学 | Double-planet-row series-parallel dual-mode transmission system |
| CN115534657A (en) * | 2021-06-30 | 2022-12-30 | 比亚迪股份有限公司 | Hybrid power system and vehicle with same |
| CN115703344A (en) * | 2021-08-16 | 2023-02-17 | 比亚迪股份有限公司 | Hybrid power system and vehicle with same |
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