CN111196141A - Hybrid power coupling mechanism, control system and control method - Google Patents

Hybrid power coupling mechanism, control system and control method Download PDF

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Publication number
CN111196141A
CN111196141A CN201811374524.1A CN201811374524A CN111196141A CN 111196141 A CN111196141 A CN 111196141A CN 201811374524 A CN201811374524 A CN 201811374524A CN 111196141 A CN111196141 A CN 111196141A
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China
Prior art keywords
engine
mode
hybrid
driving
controlling
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CN201811374524.1A
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Chinese (zh)
Inventor
赵江灵
张安伟
杨勇
尚阳
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Guangzhou Automobile Group Co Ltd
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Guangzhou Automobile Group Co Ltd
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Priority to CN201811374524.1A priority Critical patent/CN111196141A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/36—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings
    • B60K6/365—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings with the gears having orbital motion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/44—Series-parallel type
    • B60K6/445—Differential gearing distribution type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/02—Conjoint control of vehicle sub-units of different type or different function including control of driveline clutches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
    • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
    • B60W20/15—Control strategies specially adapted for achieving a particular effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2510/00—Input parameters relating to a particular sub-units
    • B60W2510/24—Energy storage means
    • B60W2510/242—Energy storage means for electrical energy
    • B60W2510/244—Charge state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2520/00—Input parameters relating to overall vehicle dynamics
    • B60W2520/10—Longitudinal speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/02—Clutches
    • B60W2710/021—Clutch engagement state
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/06—Combustion engines, Gas turbines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W2710/00—Output or target parameters relating to a particular sub-units
    • B60W2710/08—Electric propulsion units
    • 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)
  • Automation & Control Theory (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention discloses a hybrid power coupling mechanism, comprising: the engine, one-way clutch, the torsional vibration damper, the generator, first planet row includes first sun gear, first planet carrier and first ring gear, stopper, second planet row, the second planet row includes second sun gear, second planet carrier and second ring gear, driving motor, differential mechanism. The invention also provides a hybrid power coupling control system and a control method. The hybrid power coupling mechanism, the control system and the control method have high system efficiency and good economic performance.

Description

Hybrid power coupling mechanism, control system and control method
Technical Field
The invention relates to the technical field of automobiles, in particular to a hybrid power coupling mechanism, a control system and a control method.
Background
Currently, the powertrain system includes an engine (internal combustion engine) and a transmission system consisting of a transmission, a differential and a propeller shaft, and functions to provide the vehicle with the driving power required for the driving wheels. Engines (internal combustion engines) have a range of speeds and torques and achieve optimum operation over a small range, with minimal fuel consumption, minimal harmful emissions, or both. However, the actual road conditions vary greatly, and they are reflected not only in the speed of the driving wheels, but also in the torque required by the driving wheels. Therefore, it is a primary task of the transmission to achieve the optimum rotation speed and torque of the engine (internal combustion engine), i.e., the optimum power state, and match the power state of the driving wheels well.
In recent years, the advent of motor hybrid technology has opened up new ways to achieve a complete match of power between an engine (internal combustion engine) and a power wheel. Among the many designs of powertrain, the most representative are the series hybrid system and the parallel hybrid system.
In the motor 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. The generator-motor combination can be considered as a transmission in the conventional sense, which, when used in combination with an energy storage, such as a battery, capacitor, etc., can also be used as an energy regulating device to accomplish independent speed and torque regulation.
The motor parallel hybrid system has two parallel independent power chains: one power chain consists of a conventional mechanical transmission and the other consists of a motor-battery system. The mechanical transmission is responsible for speed regulation, while the motor-battery system regulates power or torque. In order to fully develop the potential of the whole system, the mechanical transmission also needs to adopt a stepless speed change mode.
The series hybrid system has the advantages of simple structure and flexible layout; but because all power passes through the generator and the motor, the power requirement of the motor is high, the volume is large, and the weight is heavy; meanwhile, the efficiency of the whole system is low because the energy transmission process is subjected to two mechanical-electrical and electrical-mechanical conversions.
In the parallel hybrid system, only part of power passes through the motor system, so the power requirement on the motor is relatively low, and the efficiency of the whole system is high; however, this parallel hybrid system requires two separate subsystems, is expensive, and is typically only used for weak hybrid systems.
Disclosure of Invention
The invention aims to provide a hybrid power coupling mechanism, a control system and a control method, which have high system efficiency and good economic performance.
In order to achieve the above object, the present invention provides a hybrid coupling mechanism for driving a hybrid vehicle, including:
an engine;
a one-way clutch connected to the engine output shaft to rotate the engine only in a forward direction;
a torsional damper connected to the engine output shaft and located between the engine and a one-way clutch;
a generator arranged coaxially with the engine;
the first planet row is used for connecting the engine and the generator and comprises a first sun gear, a first planet carrier and a first inner gear ring; wherein the engine is connected with the first planet carrier and the generator is connected with the first sun gear;
a brake connected to the first sun gear;
the second planet row comprises a second sun gear, a second planet carrier and a second inner gear ring, wherein the second inner gear ring is fixed, and the second sun gear is meshed with the first inner gear ring of the first planet row through a first gear;
the input end of the driving motor is connected with the power battery, the output end of the driving motor is connected with the second sun gear of the second planet row through a second gear, and the driving motor is arranged in parallel with the generator;
and the differential is connected with the second planet carrier of the second planet row and is connected with a wheel axle.
In the hybrid power coupling mechanism, when braking is needed, the driving motor can generate braking torque to brake wheels, and can generate induced current to charge the power battery.
In order to solve the same technical problem, the present invention also provides a hybrid coupling control system for driving a hybrid vehicle, comprising a hybrid coupling mechanism and a mode control device, wherein:
the hybrid coupling mechanism includes:
an engine;
a one-way clutch connected to the engine output shaft to rotate the engine only in a forward direction;
a torsional damper connected to the engine output shaft and located between the engine and a one-way clutch;
a generator arranged coaxially with the engine;
the first planet row is used for connecting the engine and the generator and comprises a first sun gear, a first planet carrier and a first inner gear ring; wherein the engine is connected with the first planet carrier and the generator is connected with the first sun gear;
a brake connected to the first sun gear;
the second planet row comprises a second sun gear, a second planet carrier and a second inner gear ring, wherein the second inner gear ring is fixed, and the second sun gear is meshed with the first inner gear ring of the first planet row through a first gear;
the input end of the driving motor is connected with the power battery, the output end of the driving motor is connected with the second sun gear of the second planet row through a second gear, and the driving motor is arranged in parallel with the generator;
the differential is connected with the second planet carrier of the second planet row and is connected with a wheel axle;
the mode control device is used for determining the working mode of the hybrid power coupling mechanism according to the current battery SOC value or/and the current vehicle speed of the vehicle and switching the hybrid power coupling mechanism to the determined working mode, wherein the working mode comprises a single-motor pure electric driving mode, a double-motor pure electric driving mode, an engine single driving mode and a hybrid driving mode.
In the above hybrid coupling control system, the mode control means further includes:
the comparison unit is used for comparing the current battery SOC value with a first threshold value or/and comparing the current speed of the automobile with a second threshold value;
the working mode determining unit is used for determining the working mode of the hybrid power coupling control system according to the comparison result of the comparing unit;
and the working mode executing unit is used for controlling the closing or the position of each element in the hybrid coupling control system according to the working mode determined by the working mode determining unit so as to switch the hybrid coupling mechanism to the working mode.
In the hybrid coupling control system, the operating mode executing unit specifically switches the operating mode in the following manner:
when the determined working mode is a single-motor pure electric driving mode, controlling the engine and the generator to be closed and the brake to be disconnected, controlling the driving motor to work, and outputting driving force to the wheels;
when the determined working mode is a dual-motor pure electric driving mode, controlling the engine to be closed and the brake to be disconnected, controlling the generator and the driving motor to work, and outputting driving force to the wheels together;
when the determined working mode is an engine single driving mode, controlling the generator and the driving motor to be closed, engaging a brake, controlling the engine to work, and outputting driving force to wheels;
and when the determined working mode is a hybrid driving mode, controlling the brake to be disconnected, controlling the engine, the generator and the driving motor to work, and jointly outputting driving force to the wheels.
In the hybrid power coupling control system, the mode control device further includes a braking mode processing unit, which is used for controlling the engine to be turned off when the automobile is in a braking condition, controlling the driving motor to generate braking torque to brake the wheels, and collecting induced current generated in the driving motor to charge the power battery.
In order to solve the same technical problem, the invention further provides a hybrid coupling control method, which is applied to any one of the hybrid coupling control systems, and comprises the following steps:
step S10, determining the working mode of the hybrid power coupling mechanism according to the current battery SOC value or/and the current vehicle speed of the vehicle, wherein the working mode comprises a single-motor pure electric driving mode, a double-motor pure electric driving mode, an engine single driving mode and a hybrid driving mode;
and step S11, switching the hybrid power coupling mechanism to the determined working mode.
In the hybrid coupling control method, step S10 further includes:
step S100, comparing the current SOC value of the battery with a first threshold value, or/and comparing the current speed of the automobile with a second threshold value;
step S101, determining the working mode of the hybrid power coupling control system according to the comparison result;
and S102, controlling the closing or the position of each element in the hybrid power coupling control system according to the determined working mode, and switching the hybrid power coupling mechanism to the working mode.
In the hybrid coupling control method, step S102 includes:
when the determined working mode is a single-motor pure electric driving mode, controlling the engine and the generator to be closed and the brake to be disconnected, controlling the driving motor to work, and outputting driving force to the wheels;
when the determined working mode is a dual-motor pure electric driving mode, controlling the engine to be closed and the brake to be disconnected, controlling the generator and the driving motor to work, and outputting driving force to the wheels together;
when the determined working mode is an engine single driving mode, controlling the generator and the driving motor to be closed, engaging a brake, controlling the engine to work, and outputting driving force to wheels;
and when the determined working mode is a hybrid driving mode, controlling the brake to be disconnected, controlling the engine, the generator and the driving motor to work, and jointly outputting driving force to the wheels.
In the hybrid coupling control method, the method further includes:
and step S12, when the automobile is in a braking state, controlling the engine to be closed, controlling the driving motor to generate braking torque to brake the wheels, and collecting induced current generated in the driving motor to charge a power battery.
Compared with the prior art, the invention has the following beneficial effects:
in the hybrid power coupling mechanism, under the condition of pure electric power, both the generator and the driving motor can participate in driving, so that the power performance can be improved; under a high-speed working condition mode driven by the engine independently, the system is high in efficiency and good in economical efficiency; in a hybrid driving mode, the speed can be regulated through the planetary gear mechanism, the working interval of the engine is optimized, and the economic performance of the engine is improved;
in addition, the engine and the generator of the hybrid power coupling mechanism are connected through the planetary gear, the speed ratio is adjustable, the speed ratio range is large, and the size of the generator can be reduced; the driving motor is connected and output through the planetary gear, so that the speed ratio of the driving motor can be increased, the high speed of the motor is facilitated, the size of the motor can be reduced, and the space saving and the light weight are facilitated; the hybrid power coupling mechanism is simple in structure, only provided with one brake and simple to control.
Drawings
FIG. 1 is a schematic structural diagram of a hybrid coupling mechanism of an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a hybrid power coupling control system in a single-motor pure electric driving mode according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a hybrid power coupling control system in a dual-motor pure electric driving mode according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a hybrid power coupling control system in an engine single-drive mode according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a hybrid coupling control system in a hybrid driving mode according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a mode control device in a hybrid coupled control system according to an embodiment of the present invention;
fig. 7 is a main flow chart of the hybrid coupling control method according to the embodiment of the invention.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
As shown in fig. 1, the Hybrid coupling mechanism provided in the present embodiment is used for driving a Hybrid Electric Vehicle, and particularly, may be applied to a plug in Hybrid Electric Vehicle (PHEV) or a Hybrid Electric Vehicle (HEV), and includes:
an engine 1;
a one-way clutch 3 connected to an output shaft of the engine 1 to rotate the engine 1 only in a forward direction;
a torsional damper 2 connected to an output shaft of the engine 1 and located between the engine 1 and a one-way clutch 3;
a generator 4 arranged coaxially with the engine 1;
a first planetary row for connecting the engine 1 and the generator 4, the first planetary row including a first sun gear 5, a first carrier 6, and a first ring gear 7; wherein the engine 1 is connected with the first planet carrier 6, and the generator 4 is connected with the first sun gear 5;
a brake 8 connected to the first sun gear 5;
a second planet row comprising a second sun gear 12, a second planet carrier 14 and a second ring gear 13, wherein the second ring gear 13 is fixed, and the second sun gear 12 is meshed with the first ring gear 7 of the first planet row through a first gear 9;
the input end of the driving motor 10 is connected with a power battery, the output end of the driving motor is connected with a second sun gear 12 of the second planet row through a second gear 11, and the driving motor 10 is arranged in parallel with the generator 4;
and a differential 15 connected to the second carrier 14 of the second planetary row and to a wheel axle.
Wherein the one-way clutch 3 does not need to be controlled separately. The outer ring of the one-way clutch 3 is fixed on the housing, and the inner ring of the one-way clutch 3 is connected with the output shaft of the engine 1. The one-way clutch 1 allows only the engine 1 to rotate in the forward direction, and does not allow the engine 1 to rotate in the reverse direction, i.e., the output shaft of the engine 1 is either rotated in the forward direction or locked.
When braking is needed, the driving motor 10 can generate braking torque to brake the wheels, and can generate induced current to charge the power battery.
Correspondingly, the invention also provides a hybrid power coupling control system for driving the hybrid electric vehicle, which comprises a hybrid power coupling mechanism and a mode control device, wherein:
the hybrid coupling mechanism includes:
an engine 1;
a one-way clutch 3 connected to an output shaft of the engine 1 to rotate the engine 1 only in a forward direction;
a torsional damper 2 connected to an output shaft of the engine 1 and located between the engine 1 and a one-way clutch 3;
a generator 4 arranged coaxially with the engine 1;
a first planetary row for connecting the engine 1 and the generator 4, the first planetary row including a first sun gear 5, a first carrier 6, and a first ring gear 7; wherein the engine 1 is connected with the first planet carrier 6, and the generator 4 is connected with the first sun gear 5;
a brake 8 connected to the first sun gear 5;
a second planet row comprising a second sun gear 12, a second planet carrier 14 and a second ring gear 13, wherein the second ring gear 13 is fixed, and the second sun gear 12 is meshed with the first ring gear 7 of the first planet row through a first gear 9;
the input end of the driving motor 10 is connected with a power battery, the output end of the driving motor is connected with a second sun gear 12 of the second planet row through a second gear 11, and the driving motor 10 is arranged in parallel with the generator 4;
a differential 15 connected to the second carrier 14 of the second planetary row and to a wheel axle;
the mode control device is used for determining the working mode of the hybrid power coupling mechanism according to the current battery SOC value or/and the current vehicle speed of the vehicle and switching the hybrid power coupling mechanism to the determined working mode, wherein the working mode comprises a single-motor pure electric driving mode, a double-motor pure electric driving mode, an engine single driving mode and a hybrid driving mode.
As shown in fig. 6, in particular, in one embodiment, the mode control device 20 further includes:
the comparison unit 200 is used for comparing the current battery SOC value with a first threshold value, or/and comparing the current speed of the automobile with a second threshold value;
an operation mode determining unit 201, configured to determine an operation mode of the hybrid coupling control system according to a comparison result of the comparing unit;
and an operation mode executing unit 202, configured to control, according to the operation mode determined by the operation mode determining unit, closing or positions of various elements in the hybrid coupling control system, so that the hybrid coupling mechanism is switched to the operation mode.
Specifically, in one embodiment, the mode control device 20 further includes a braking mode processing unit 203 for controlling the engine 1 to be turned off and the driving motor 10 to generate braking torque to brake the wheels when the vehicle is in a braking condition, and collecting the induced current generated in the driving motor 10 to charge the power battery.
Specifically, the working mode executing unit switches the working mode specifically by adopting the following mode:
as shown in fig. 2, when the determined operation mode is the single-motor electric-only driving mode, the engine 1 and the generator 4 are controlled to be turned off, the brake 8 is controlled to be turned off, the driving motor 10 is controlled to operate, and driving force is output to wheels;
as shown in fig. 3, when the determined operation mode is the dual-motor electric-only driving mode, the engine 1 is controlled to be turned off, the brake 8 is controlled to be turned off, and the generator 4 and the driving motor 10 are controlled to operate to output driving force to the wheels together;
as shown in fig. 4, when the determined operation mode is the engine-only driving mode, the generator 4 and the driving motor 10 are controlled to be turned off, the brake 8 is controlled to be engaged, the engine 1 is controlled to operate, and driving force is output to wheels;
as shown in fig. 5, when the determined operation mode is the hybrid driving mode, the brake 8 is controlled to be off, and the engine 1, the generator 4 and the driving motor 10 are controlled to operate to output driving force to the wheels in common.
Table 1 lists the execution components and the use conditions in the above 4 driving modes:
TABLE 1 driving mode, executive component and service condition comparison table
Figure BDA0001869162580000101
In each drive mode, the one-way clutch operates as follows:
1) the dual-motor pure electric driving mode comprises the following steps: when the generator participates in driving, the one-way clutch works, and at the moment, the output shaft of the engine is locked;
2) starting the engine: when the engine is started, the generator drives the output shaft of the engine to rotate forwards;
3) hybrid drive mode: the engine also rotates forwards;
4) engine-only drive mode: the engine is also rotating in the forward direction.
Table 2 lists the one-way clutch and engine states in the 4 drive modes described above:
TABLE 2 Driving mode with one-way clutch and Engine State LUT
Figure BDA0001869162580000111
It can be understood that when the battery electric quantity is sufficient, the whole vehicle can run in a pure electric drive mode; the pure electric working condition can be that the driving motor works alone, or the driving motor and the generator participate in driving at the same time, so that the power performance of the automobile can be improved, as shown in fig. 2 and 3.
And when the speed is higher, the engine can be used for driving the vehicle in a single mode, so that the economical efficiency of the vehicle is good, and the system efficiency is high, as shown in figure 4.
According to the working condition of the whole vehicle, when the requirement on the vehicle speed is high, the coupling mechanism can be switched to a hybrid driving mode, and at the moment, the speed can be regulated through the planetary gear mechanism, so that the working interval of the engine is optimized, and the economic performance of the engine is improved, as shown in fig. 5.
In the aspect of power regulation, the hybrid power coupling control system provided by the invention can effectively supplement the driving power required by the power wheel through the power battery so as to more reasonably allocate the power of the engine and keep the working state of the engine not influenced or less influenced by road conditions. The engine can always work in a set optimal state so as to improve the efficiency of the whole vehicle. Meanwhile, the system can also recover the kinetic energy during braking and return the kinetic energy to the power battery. All of these actions greatly improve the fuel efficiency of the entire vehicle.
As shown in fig. 7, the present invention further provides a hybrid coupling control method, which is applied to the hybrid coupling control system, in this embodiment, the method includes the following steps:
step S10, determining the working mode of the hybrid power coupling mechanism according to the current battery SOC value or/and the current vehicle speed of the vehicle, wherein the working mode comprises a single-motor pure electric driving mode, a double-motor pure electric driving mode, an engine single driving mode and a hybrid driving mode;
and step S11, switching the hybrid power coupling mechanism to the determined working mode.
Specifically, the step S10 further includes:
step S100, comparing the current SOC value of the battery with a first threshold value, or/and comparing the current speed of the automobile with a second threshold value;
step S101, determining the working mode of the hybrid power coupling control system according to the comparison result;
and S102, controlling the closing or the position of each element in the hybrid power coupling control system according to the determined working mode, and switching the hybrid power coupling mechanism to the working mode.
Specifically, the step S102 includes:
when the determined working mode is a single-motor pure electric driving mode, controlling the engine 1 and the generator 4 to be closed, and the brake 8 to be disconnected, controlling the driving motor 10 to work, and outputting driving force to wheels;
when the determined working mode is a dual-motor pure electric driving mode, controlling the engine 1 to be closed and the brake 8 to be disconnected, controlling the generator 4 and the driving motor 10 to work, and outputting driving force to wheels together;
when the determined working mode is an engine single driving mode, controlling the generator 4 and the driving motor 10 to be closed, engaging the brake 8, controlling the engine 1 to work, and outputting driving force to wheels;
when the determined working mode is the hybrid driving mode, the brake 8 is controlled to be disconnected, and the engine 1, the generator 4 and the driving motor 10 are controlled to work to jointly output driving force to the wheels.
Specifically, in one embodiment, the control method further includes:
and step S12, when the automobile is in a braking state, controlling the engine 1 to be closed, controlling the driving motor 10 to generate braking torque to brake wheels, and collecting induced current generated in the driving motor 10 to charge a power battery.
In conclusion, compared with the prior art, the invention has the following beneficial effects:
in the hybrid power coupling mechanism, under the condition of pure electric power, both the generator and the driving motor can participate in driving, so that the power performance can be improved; under a high-speed working condition mode driven by the engine independently, the system is high in efficiency and good in economical efficiency; in a hybrid driving mode, the speed can be regulated through the planetary gear mechanism, the working interval of the engine is optimized, and the economic performance of the engine is improved;
in addition, the engine and the generator of the hybrid power coupling mechanism are connected through the planetary gear, the speed ratio is adjustable, the speed ratio range is large, and the size of the generator can be reduced; the driving motor is connected and output through the planetary gear, so that the speed ratio of the driving motor can be increased, the high speed of the motor is facilitated, the size of the motor can be reduced, and the space saving and the light weight are facilitated; the hybrid power coupling mechanism is simple in structure, only provided with one brake and simple to control.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims (10)

1. A hybrid coupling mechanism for driving a hybrid vehicle, comprising:
an engine (1);
a one-way clutch (3) connected to an output shaft of the engine (1) so that the engine (1) rotates only in a forward direction;
a torsional damper (2) connected to an output shaft of the engine (1) and located between the engine (1) and a one-way clutch (3);
a generator (4) arranged coaxially with the engine (1);
a first planetary row for connecting the engine (1) and a generator (4), the first planetary row comprising a first sun gear (5), a first planet carrier (6) and a first ring gear (7); wherein the engine (1) is connected with the first planet carrier (6) and the generator (4) is connected with the first sun gear (5);
a brake (8) connected to the first sun gear (5);
the second planet row comprises a second sun gear (12), a second planet carrier (14) and a second inner gear ring (13), wherein the second inner gear ring (13) is fixed, and the second sun gear (12) is meshed with the first inner gear ring (7) of the first planet row through a first gear (9);
the input end of the driving motor (10) is connected with a power battery, the output end of the driving motor is connected with a second sun gear (12) of the second planet row through a second gear (11), and the driving motor (10) is arranged in parallel with the generator (4);
a differential (15) connected to the second planet carrier (14) of the second row and to a wheel axle.
2. A hybrid coupling mechanism according to claim 1, wherein the drive motor (10) is adapted to generate a braking torque to brake the wheels when braking is required, and to generate an induced current to charge the power battery.
3. A hybrid coupling control system for driving a hybrid vehicle, comprising a hybrid coupling mechanism and a mode control device, wherein:
the hybrid coupling mechanism includes:
an engine (1);
a one-way clutch (3) connected to an output shaft of the engine (1) so that the engine (1) rotates only in a forward direction;
a torsional damper (2) connected to an output shaft of the engine (1) and located between the engine (1) and a one-way clutch (3);
a generator (4) arranged coaxially with the engine (1);
a first planetary row for connecting the engine (1) and a generator (4), the first planetary row comprising a first sun gear (5), a first planet carrier (6) and a first ring gear (7); wherein the engine (1) is connected with the first planet carrier (6) and the generator (4) is connected with the first sun gear (5);
a brake (8) connected to the first sun gear (5);
the second planet row comprises a second sun gear (12), a second planet carrier (14) and a second inner gear ring (13), wherein the second inner gear ring (13) is fixed, and the second sun gear (12) is meshed with the first inner gear ring (7) of the first planet row through a first gear (9);
the input end of the driving motor (10) is connected with a power battery, the output end of the driving motor is connected with a second sun gear (12) of the second planet row through a second gear (11), and the driving motor (10) is arranged in parallel with the generator (4);
a differential (15) connected to the second planet carrier (14) of the second planetary row and to a wheel axle;
the mode control device is used for determining the working mode of the hybrid power coupling mechanism according to the current battery SOC value or/and the current vehicle speed of the vehicle and switching the hybrid power coupling mechanism to the determined working mode, wherein the working mode comprises a single-motor pure electric driving mode, a double-motor pure electric driving mode, an engine single driving mode and a hybrid driving mode.
4. The hybrid coupling control system of claim 3, wherein the mode control means further comprises:
the comparison unit is used for comparing the current battery SOC value with a first threshold value or/and comparing the current speed of the automobile with a second threshold value;
the working mode determining unit is used for determining the working mode of the hybrid power coupling control system according to the comparison result of the comparing unit;
and the working mode executing unit is used for controlling the closing or the position of each element in the hybrid coupling control system according to the working mode determined by the working mode determining unit so as to switch the hybrid coupling mechanism to the working mode.
5. The hybrid coupling control system according to claim 4, wherein the operation mode executing unit switches the operation mode specifically by:
when the determined working mode is a single-motor pure electric driving mode, controlling the engine (1) and the generator (4) to be closed, and the brake (8) to be disconnected, controlling the driving motor (10) to work, and outputting driving force to wheels;
when the determined working mode is a double-motor pure electric driving mode, controlling the engine (1) to be closed and the brake (8) to be disconnected, controlling the generator (4) and the driving motor (10) to work, and outputting driving force to wheels together;
when the determined working mode is an engine single driving mode, controlling the generator (4) and the driving motor (10) to be closed, engaging a brake (8), controlling the engine (1) to work, and outputting driving force to wheels;
and when the determined working mode is a hybrid driving mode, controlling the brake (8) to be disconnected, controlling the engine (1), the generator (4) and the driving motor (10) to work, and jointly outputting driving force to the wheels.
6. The hybrid coupling control system according to claim 4, wherein the mode control means further comprises a braking mode processing unit for controlling the engine (1) to be turned off and the driving motor (10) to generate a braking torque to brake the wheels while collecting an induced current generated in the driving motor (10) to charge a power battery when the vehicle is in a braking condition.
7. A hybrid coupling control method applied to the hybrid coupling control system according to any one of claims 3 to 6, characterized by comprising the steps of:
step S10, determining the working mode of the hybrid power coupling mechanism according to the current battery SOC value or/and the current vehicle speed of the vehicle, wherein the working mode comprises a single-motor pure electric driving mode, a double-motor pure electric driving mode, an engine single driving mode and a hybrid driving mode;
and step S11, switching the hybrid power coupling mechanism to the determined working mode.
8. The hybrid coupling control method according to claim 7, wherein the step S10 further includes:
step S100, comparing the current SOC value of the battery with a first threshold value, or/and comparing the current speed of the automobile with a second threshold value;
step S101, determining the working mode of the hybrid power coupling control system according to the comparison result;
and S102, controlling the closing or the position of each element in the hybrid power coupling control system according to the determined working mode, and switching the hybrid power coupling mechanism to the working mode.
9. The hybrid coupling control method according to claim 8, wherein the step S102 includes:
when the determined working mode is a single-motor pure electric driving mode, controlling the engine (1) and the generator (4) to be closed, and the brake (8) to be disconnected, controlling the driving motor (10) to work, and outputting driving force to wheels;
when the determined working mode is a double-motor pure electric driving mode, controlling the engine (1) to be closed and the brake (8) to be disconnected, controlling the generator (4) and the driving motor (10) to work, and outputting driving force to wheels together;
when the determined working mode is an engine single driving mode, controlling the generator (4) and the driving motor (10) to be closed, engaging a brake (8), controlling the engine (1) to work, and outputting driving force to wheels;
and when the determined working mode is a hybrid driving mode, controlling the brake (8) to be disconnected, controlling the engine (1), the generator (4) and the driving motor (10) to work, and jointly outputting driving force to the wheels.
10. The hybrid coupling control method of claim 9, wherein the method further comprises:
and step S12, when the automobile is in a braking state, controlling the engine (1) to be closed, controlling the driving motor (10) to generate braking torque to brake the wheels, and collecting induced current generated in the driving motor (10) to charge a power battery.
CN201811374524.1A 2018-11-16 2018-11-16 Hybrid power coupling mechanism, control system and control method Pending CN111196141A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000094973A (en) * 1998-09-28 2000-04-04 Hitachi Ltd Transmission and hybrid vehicle using it
CN103770625A (en) * 2014-01-23 2014-05-07 江苏大学 Double-planet row type dynamic coupling mechanism for hybrid electric vehicle
CN106080169A (en) * 2016-07-06 2016-11-09 南京理工大学 Mixed power coupling device based on two-row planetary gear
CN107054050A (en) * 2017-04-27 2017-08-18 广州汽车集团股份有限公司 Automobile hybrid power coupled system and its control method
CN108128138A (en) * 2017-12-14 2018-06-08 广州汽车集团股份有限公司 A kind of hybrid power coupling mechanism, control system and control method
CN208035935U (en) * 2018-03-19 2018-11-02 广州汽车集团股份有限公司 Automobile hybrid power coupled system
CN209208473U (en) * 2018-11-16 2019-08-06 广州汽车集团股份有限公司 Hybrid power coupling mechanism, hybrid power coupling control system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000094973A (en) * 1998-09-28 2000-04-04 Hitachi Ltd Transmission and hybrid vehicle using it
CN103770625A (en) * 2014-01-23 2014-05-07 江苏大学 Double-planet row type dynamic coupling mechanism for hybrid electric vehicle
CN106080169A (en) * 2016-07-06 2016-11-09 南京理工大学 Mixed power coupling device based on two-row planetary gear
CN107054050A (en) * 2017-04-27 2017-08-18 广州汽车集团股份有限公司 Automobile hybrid power coupled system and its control method
CN108128138A (en) * 2017-12-14 2018-06-08 广州汽车集团股份有限公司 A kind of hybrid power coupling mechanism, control system and control method
CN208035935U (en) * 2018-03-19 2018-11-02 广州汽车集团股份有限公司 Automobile hybrid power coupled system
CN209208473U (en) * 2018-11-16 2019-08-06 广州汽车集团股份有限公司 Hybrid power coupling mechanism, hybrid power coupling control system

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