CN106945497B - A kind of bi-motor Two-mode Coupling drive system of electric motor vehicle - Google Patents

A kind of bi-motor Two-mode Coupling drive system of electric motor vehicle Download PDF

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Publication number
CN106945497B
CN106945497B CN201710200309.9A CN201710200309A CN106945497B CN 106945497 B CN106945497 B CN 106945497B CN 201710200309 A CN201710200309 A CN 201710200309A CN 106945497 B CN106945497 B CN 106945497B
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motor
clutch
speed
mode
lock device
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CN106945497A (en
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林歆悠
魏申申
吴超宇
王黎明
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Fuzhou University
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Fuzhou University
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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
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • B60K1/02—Arrangement or mounting of electrical propulsion units comprising more than one electric motor
    • 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
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B60L15/2054—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed by controlling transmissions or clutches
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D48/00—External control of clutches
    • F16D48/06—Control by electric or electronic means, e.g. of fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2220/00—Electrical machine types; Structures or applications thereof
    • B60L2220/40—Electrical machine applications
    • B60L2220/42—Electrical machine applications with use of more than one motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/10—Vehicle control parameters
    • B60L2240/12—Speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/421—Speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/10—System to be controlled
    • F16D2500/104—Clutch
    • F16D2500/10406—Clutch position
    • F16D2500/10412—Transmission line of a vehicle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/10—System to be controlled
    • F16D2500/104—Clutch
    • F16D2500/10406—Clutch position
    • F16D2500/10431—4WD Clutch dividing power between the front and the rear axle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/10—System to be controlled
    • F16D2500/106—Engine
    • F16D2500/1064—Electric
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/10—System to be controlled
    • F16D2500/108—Gear
    • F16D2500/1087—Planetary gearing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/304—Signal inputs from the clutch
    • F16D2500/3041—Signal inputs from the clutch from the input shaft
    • F16D2500/30412—Torque of the input shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/304—Signal inputs from the clutch
    • F16D2500/3041—Signal inputs from the clutch from the input shaft
    • F16D2500/30415—Speed of the input shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/31—Signal inputs from the vehicle
    • F16D2500/3108—Vehicle speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/314—Signal inputs from the user
    • F16D2500/31406—Signal inputs from the user input from pedals
    • F16D2500/31426—Brake pedal position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/30—Signal inputs
    • F16D2500/314—Signal inputs from the user
    • F16D2500/31406—Signal inputs from the user input from pedals
    • F16D2500/3144—Accelerator pedal position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2500/00—External control of clutches by electric or electronic means
    • F16D2500/70—Details about the implementation of the control system
    • F16D2500/704—Output parameters from the control unit; Target parameters to be controlled
    • F16D2500/70464—Transmission parameters
    • F16D2500/70476—Output shaft
    • F16D2500/70484—Output shaft speed
    • 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
    • Y02T10/64—Electric machine technologies in electromobility
    • 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
    • Y02T10/72—Electric energy management in electromobility

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Structure Of Transmissions (AREA)

Abstract

The present invention relates to a kind of bi-motor Two-mode Coupling drive system of electric motor vehicle, comprising: first motor, the second motor, first clutch, second clutch, third clutch, the first lock device, the second lock device and simple planetary arrangement；It further include actuating mechanism controls unit and the transducing signal acquiring unit being connected with the actuating mechanism controls unit, dtc signal calculation processing unit, Vehicular status signal acquiring unit and driving mechanism；Actuating mechanism controls unit identifies electric vehicle present mode of operation by transducing signal acquiring unit, dtc signal calculation processing unit and Vehicular status signal acquiring unit, pattern switching and power distribute, and first motor, the second motor, first clutch, second clutch, third clutch, the first lock device and the second lock device are respectively driven through driving mechanism, transmission shaft is driven by single planetary gear construction, and then drives the wheel operating of electric car.

Description

A kind of bi-motor Two-mode Coupling drive system of electric motor vehicle
Technical field
The present invention relates to a kind of bi-motor Two-mode Coupling drive system of electric motor vehicle.
Background technique
Tradition is due to global air pollution and energy shortage problem, and electric car has been to be concerned by more and more people and blueness It looks at.Driving form of the motor driven systems on electric car is mainly shown as that more motors independently drive and single motor centralization is driven It is dynamic.The vehicle that more motors independently drive is mainly shown as In-wheel motor driving form and wheel motor independence drive form.Wheel hub Type motor-driven can simplify drive system structure, and arrangement is convenient, but be confined to the torque density of driving motor, wheel hub with The integrated manufacture level of motor, technology are also immature；Wheel motor independence drive form structure is not compact, and weight, volume are big, function Rate density advantages are unobvious.
Traditional electric car remains the mechanical structure of most of fuel-engined vehicle, and part electric car is only by engine It is substituted for motor, making automobile chassis still has heavy and complicated mechanical mechanism, is unfavorable for energy conservation and reduces cost.Now Also there is the drive system using Dual-motors Driving, but since the motor or two differences that use two same sizes are big Small motor shows slightly insufficient, needs to be mentioned to the adaptability of running environment in the distribution and efficiency of energy utilization of driving force It is high.
Application No. is 201210024534.9 Chinese patent provide a kind of electric car bi-motor coupling driving and its Control system, by one group of planetary gear mechanism, one group of gear drive, two driving motors, a lock device, two clutches Device composition, by two clutches and lock device jointly control may be implemented bi-motor torque coupling output, turn Output is operated alone in speed coupling and main motor.The program realizes unpowered transmitting when vehicle driving；In low speed by double Big torque output is realized in motor torque coupling, realizes high revolving speed output by motor rotating speed coupling when high speed.But in low speed Small torque operating condition, automobile are driven by main motor, since main motor rate of load condensate is lower, cause the configuration in the small torque of low speed Economy be not obvious；Under revolving speed coupled mode, the torque unreasonable distribution of two motors, high-speed working condition economy is unknown It is aobvious；And since two motors use parallel shaft arrangement, to guarantee suitable distance between axles, cause device volume larger.
Application No. is 201010100671.7 Chinese patents to disclose a kind of bi-motor for being suitable for pure electric coach turn The electric driver of speed coupling, is made of one group of simple planetary mechanism, two driving motors, a lock device.When low speed, Lock device is exported planet carrier locking, No.1 motor power through sun gear by planet carrier, and No.1 motor is operated alone；When high speed, Planet carrier unlock, the second motor are connect with planetary gear mechanism planet carrier, are realized and are turned by planetary gear mechanism with first motor Speed coupling.Program structure structure is simple, is coupled by revolving speed under high-speed case, can reduce single motor power.The disadvantage is that Operating mode is few, and when vehicle low speed can only be operated alone by first motor, and it is big that this requires first motor torque capacities；Low Under the small torque operating condition of speed, since rate of load condensate is relatively low, the economy of No.1 motor driven configuration is not obvious.
Application No. is 201320779634.2 Chinese patents to provide a kind of follow-on electric car bi-motor coupling Drive system.It is the main motor and auxiliary motor, No. two transmission gears, No. two clutches, three by being disposed coaxially on system both ends Number transmission gear, No. three clutches, planetary gear mechanism composition.Stand-by motor, middle high revolving speed are used in the small torque operating condition of low speed Middle torque is driven using main motor, and low speed high torque uses bi-motor torque coupling, and high-speed working condition is coupled using motor rotating speed. Although the structure uses coaxially arranged, transmission gear is largely used, makes that structure is complicated, volume becomes larger.At small turn of low speed Square uses auxiliary motor, and torque uses main motor in high speed, be easy to cause low speed torque insufficient, and high speed torque is excessive, and Master, auxiliary motor, it is also possible to main motor service life be caused not grow are not utilized rationally.
For above-mentioned problem, a kind of novel dual-motor drive system is provided for electric car, structure is simpler, property Can be more reliable, keep arrangement more flexible, the energy can be made full use of but also improve the service life of drive system motor.
Summary of the invention
The purpose of the present invention is to provide a kind of bi-motor Two-mode Coupling drive system of electric motor vehicle, to overcome in the prior art Existing defect.
To achieve the above object, the technical scheme is that a kind of bi-motor Two-mode Coupling drive system of electric motor vehicle, packet Include: first motor, the second motor, first clutch, second clutch, third clutch, the first lock device, the second lock device with And simple planetary arrangement；The sensing for further including an actuating mechanism controls unit and being connected with the actuating mechanism controls unit Signal acquiring unit, dtc signal calculation processing unit, Vehicular status signal acquiring unit and driving mechanism；The execution machine Structure control unit is believed by the transducing signal acquiring unit, the dtc signal calculation processing unit and the vehicle-state Number acquiring unit identifies electric vehicle present mode of operation, the distribution of pattern switching and power, and through the driving machine Structure respectively drive the first motor, second motor, the first clutch, the second clutch, the third from Clutch, first lock device and second lock device drive the transmission shaft by the single planetary gear construction, And then drive the wheel operating of electric car.
In an embodiment of the present invention, the transducing signal acquiring unit include a vehicle speed sensor, a speed probe, The first analog signal input circuit, the accelerator pedal being connected respectively with the vehicle speed sensor and the speed probe pass Sensor, a brake pedal sensor, be connected respectively with the accelerator pedal sensor and the brake pedal sensor Two analog signal input circuits, respectively with first analog signal input circuit and second analog signal input circuit Connected signal processing circuit.
In an embodiment of the present invention, the first motor and second motor coaxle are arranged, and pass through single planetary gear Mechanism is connected with transmission shaft；The first motor passes through the sun in the first clutch and the simple planetary arrangement Wheel is connected；Second motor is connected by the second clutch and the third clutch with the sun gear, and institute It states the second motor and is connected by the third clutch with the planet carrier of the simple planetary arrangement；The first locking machine Structure is set on the planet carrier, and second lockable mechanism is set on the sun gear.
In an embodiment of the present invention, the transmission shaft is the front propeller shaft of the electric car, and the front propeller shaft is logical It overdrives left and right wheels of the bridge by power transmission to electric car front axle.
In an embodiment of the present invention, the electric vehicle present mode of operation identification, pattern switching and power distributed Journey is as follows:
(1) when electric car starting, climbing or acceleration, the actuating mechanism controls unit are sensed according to the accelerator pedal The signal that device provides obtains the corresponding current single motor demand torque of the signal, and provided with the current single motor of electric car Torque capacity is compared；If torque capacity and the current single motor demand torque that current single motor provides mismatch, The first motor is run simultaneously with second motor, using torque coupling namely TC mode；
(2) when electric car even running, the actuating mechanism controls unit is according to the speed probe and described The tach signal and speed signal that vehicle speed sensor provides, obtain and the tach signal is corresponding with speed signal matching current Single motor demand revolving speed, and the maximum (top) speed provided with the current single motor of electric car is compared；If current single motor provides Maximum (top) speed and current single motor demand revolving speed when mismatching, the first motor and second motor are run together simultaneously Shi Yunhang, is coupled namely SC mode using revolving speed；
(3) when electric car even running, the actuating mechanism controls unit is according to the speed probe and described The tach signal and speed signal that vehicle speed sensor provides, obtain and the tach signal is corresponding with speed signal matching current Single motor demand revolving speed, and the maximum (top) speed provided with the current single motor of electric car is compared；If current single motor provides Maximum (top) speed when being matched with the current single motor demand revolving speed, using single motor operational mode namely SM1 mode or SM2 mould Formula, and the SM1 mode and SM2 mode are changeable.
When in an embodiment of the present invention, using the TC mode, the first clutch and the second clutch Closure, the third clutch disconnect, and the first lock device closure, second lock device disconnects, the first motor with Second motor operates simultaneously, and connect simultaneously with the sun gear, at this time torque coupling, and the planet carrier is fixed, described Sun gear is driving link, and the planetary gear is driven to rotate；The planetary gear is as Passive part, by power transmission to transmission shaft.
When in an embodiment of the present invention, using the SC mode, the first clutch closure, the third clutch Closure, the first motor are connected by the first clutch with the sun gear, and second motor passes through the third Clutch is connect with the planet carrier, and the second clutch disconnects, and first lock device and second lock device disconnect, The first motor operates simultaneously with second motor, while the planetary gear being driven to operate, and revolving speed couples at this time, by power It is transmitted to transmission shaft.
When in an embodiment of the present invention, using the SM1 mode, the first clutch closure, the first lock device is closed It closes, second lock device disconnects, and the planet carrier is fixed, and the first motor passes through the first clutch and the sun Wheel is connected, and drives the sun gear to operate by the first motor, and the sun wheel drive is planetary gear operating, and power is passed Transport to transmission shaft.
When in an embodiment of the present invention, using the SM2 mode, the third clutch closure, first locking Device disconnects, and second lock device closure, the sun gear is fixed, second motor by the third clutch with it is described Planet carrier is connected, and drives the planet carrier to operate by second motor, and the planet carrier drives the planetary gear operating, will Power transmission is to transmission shaft.
Compared to the prior art, the invention has the following advantages:
1, the working condition that can adjust motor in due course according to vehicle driving state, can improve vehicle and fit to running environment Stress.
2, a set of simple planetary arrangement is only used only in two motors, and structure is simpler, and is arranged using trunnion axis, whole Vehicle arrangement is more flexible.
3, two motors can choose at random, and dereliction takes second place point, alternating individual can run, and improve motor uses the longevity Life.
4, it can be used alone another motor driven rear axle, improve the dynamic property of automobile, realize four-wheel drive.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of dual-motor drive system of the present invention.
Fig. 2 is a kind of flow diagram of dual-motor drive system of the present invention.
Fig. 3 is the bi-motor simplified model of mechanism of the present invention.
Fig. 4 is the power transmission figure of executing agency under mechanism TC working condition of the present invention.
Fig. 5 is the power transmission figure of executing agency under mechanism SC working condition of the present invention.
Fig. 6 is the power transmission figure of executing agency under mechanism SM1 working condition of the present invention.
Fig. 7 is the power transmission figure of executing agency under mechanism SM2 working condition of the present invention.
Fig. 8 is a kind of control strategy software figure of novel double-motor drive system of the present invention.
Specific embodiment
With reference to the accompanying drawing, technical solution of the present invention is specifically described.
The present invention provides a kind of bi-motor Two-mode Coupling drive system of electric automobile, as shown in Figure 1, include motor (M1), Motor (M2), clutch (C1), clutch (C2), clutch (C3), lock device (L1), lock device (L2), planetary gear mechanism. Bi-motor is coaxially arranged, is only connected by simple planetary arrangement with transmission shaft, power passes to wheel of vehicle through transmission shaft.Electricity Machine (M1) is connected by clutch (C1) with the sun gear of simple planetary arrangement, motor (M2) pass through clutch (C3), from Clutch (C2) is connected with sun gear, and motor (M2) passes through the planet carrier phase of clutch (C3) and simple planetary arrangement Even.Have on the planet carrier of simple planetary arrangement lockable mechanism (L1), there is lockable mechanism (L2) on sun gear, planetary gear will move Power passes to drive axle by transmission shaft, drives automobile runs.
Further, transmission shaft is the front propeller shaft of electric car.Power is respectively transmitted to by transmission shaft by drive axle The left and right wheels of automobile front axle.
Further, as shown in Fig. 3 and Fig. 8, further include an actuating mechanism controls unit and controlled with the executing agency Unit processed connected transducing signal acquiring unit, dtc signal calculation processing unit, Vehicular status signal acquiring unit and drive Motivation structure；Actuating mechanism controls unit passes through transducing signal acquiring unit, the dtc signal calculation processing unit and described Vehicular status signal acquiring unit identifies electric vehicle present mode of operation, pattern switching and power are distributed, and passed through Driving mechanism respectively drives the first motor, the second motor, first clutch, second clutch, third clutch, the first lock Only device and the second lock device drive transmission shaft by single planetary gear construction, and then drive the wheel operating of electric car. Transducing signal acquiring unit include a vehicle speed sensor, a speed probe, respectively with vehicle speed sensor and speed probe Connected the first analog signal input circuit, a brake pedal sensor, is passed with accelerator pedal one accelerator pedal sensor respectively The second connected analog signal input circuit of sensor and brake pedal sensor, respectively with the first analog signal input circuit with And the second connected signal processing circuit of analog signal input circuit.
Further, biggish due to needing when electric car starts, and climbs or accelerates as shown in table 1 and Fig. 2 Power and torque, bi-motor work at the same time, using torque coupling namely TC mode.When automobile needs higher rotation speed, bi-motor It works at the same time, is coupled using revolving speed namely SC mode.When automobile balance when driving, worked independently by a motor namely SM1 Mode or SM2 mode.When needing anxious accelerate, two motors are run simultaneously, provide power for electric car.Can satisfy automobile The requirement of small rate of load condensate, low speed and heavy load rate, high-speed cruising operating condition in middle low speed.It is driven under middle Smaller load using single motor, Rate of load condensate can be improved, reach energy-efficient purpose.It under large torque and high-speed working condition, is coupled using bi-motor, to reach section The purpose of energy.
Table 1
Further, when be in TC mode when, related mechanism include motor (1), motor (2), clutch (C1), from Clutch (C2), clutch (C3), lock device (L1), lock device (L2), planetary gear mechanism.Motor (1) and motor (2) series connection, It works together, biggish torque is provided, be bi-motor torque coupling operating mode.
When automobile starting, climbing or when accelerating, letter that actuating mechanism controls unit is provided according to accelerator pedal sensor Number, the torque capacity for obtaining the corresponding current single motor demand torque of the signal, and being provided with the current single motor of electric car into Row compares；If torque capacity and the current single motor demand torque that current single motor provides mismatch, illustrate electronic vapour Vehicle currently needs biggish power and torque, and current single motor torque capacity is insufficient for requiring, then motor (1) and electricity Machine (2) operates simultaneously, and clutch (C1) and clutch (C2) closure, clutch (C3) disconnect, lock device (L1) closure, lock device (L2) it disconnects, motor (1) and motor (2) are connect with sun gear simultaneously, and planet carrier is fixed at this time, and sun gear is as driving link, band Dynamic planetary gear operating.Planetary gear passes to front propeller shaft as Passive part, by power, and then passes to front driving axle, passes to front axle Left and right wheels.It is as shown in Figure 4 that its power transmits schematic diagram.
Further, when being in SC mode, related mechanism includes including motor (1), motor (2), clutch (C1), clutch (C2), clutch (C3), lock device (L1), lock device (L2), planetary gear mechanism.Motor (1) and motor (2) in parallel, it works together, biggish revolving speed is provided, be motor rotating speed coupled mode.
When the revolving speed that automobile balance is run, and actuating mechanism controls unit is provided according to speed probe and vehicle speed sensor Signal and speed signal, acquisition and the tach signal current single motor demand revolving speed corresponding with speed signal matching, and with The maximum (top) speed that the current single motor of electric car provides is compared；If maximum (top) speed and the current list that current single motor provides When motor demand revolving speed mismatches, then illustrate that electric car currently needs higher rotation speed, and current single motor maximum (top) speed is not It is sufficient for requiring, then motor (1) is connected by clutch (C1) with sun gear, and motor (2) passes through clutch (C3) and planet Frame is connected, and clutch (C2) disconnects, and lock device (L1) and lock device (L2) disconnect, and two motors drive planetary gear to transport simultaneously at this time Turn, revolving speed couples at this time, makes automobile that there is higher rotation speed to impart power to automobile front axle left and right wheels by front propeller shaft. It is as shown in Figure 5 that its power transmits schematic diagram.
When electric car even running, actuating mechanism controls unit is provided according to speed probe and vehicle speed sensor Tach signal and speed signal, acquisition and the tach signal current single motor demand revolving speed corresponding with speed signal matching, And the maximum (top) speed provided with the current single motor of electric car is compared；If the maximum (top) speed that current single motor provides with deserve When preceding single motor demand revolving speed matches, then illustrate that electric car does not need higher rotation speed currently, current single motor provides most Big revolving speed is met the requirements, then using single motor operational mode namely SM1 mode or SM2 mode, and SM1 mode and SM2 mode can Switching.
Further, when being in SM1 mode, related mechanism includes motor (1), clutch (C1), lock device (L1), lock device (L2), planetary gear mechanism.Motor (1) is connected by clutch C1 with sun gear, when operation, locking Device (L1) closure, planet carrier are fixed, and lock device (L2) disconnects, and motor (1) drives sun gear operating, sun wheel drive planetary gear fortune Turn, power is passed to drive axle driving automobile runs by planetary gear.It is as shown in Figure 6 that its power transmits schematic diagram.
The power needed for automobile is smaller, when required revolving speed is smaller, according to vehicle driving state and operating condition, it can be achieved that list Motor operating improves efficiency of energy utilization and running car environmental suitability, such as when automobile is when down town is run.
Further, when being in SM2 mode, related mechanism includes motor (2), clutch (C3), lock device (L1), lock device (L2), planetary gear mechanism.Motor (2) is connected by clutch (C3) with planet carrier, operation, locking Device (L1) disconnects, and lock device (L2) closure sun gear is fixed, and motor (M2) drives planet carrier operating, and planet carrier drives planetary gear fortune Turn, power is passed to drive axle driving automobilism by planetary gear.It is as shown in Figure 7 that its power transmits schematic diagram.
According to vehicle driving state and operating condition, realizes single motor operating, improve efficiency of energy utilization and running car Environmental suitability.
Further, when automobile is worked using single motor, motor (1) and motor (2) can arbitrarily switch, and be conducive to mention High motor service life；Can also be according to the difference of use environment and use condition, the motor for selecting power different improves motor Working efficiency.
The above are preferred embodiments of the present invention, all any changes made according to the technical solution of the present invention, and generated function is made When with range without departing from technical solution of the present invention, all belong to the scope of protection of the present invention.

Claims (6)

1. a kind of bi-motor Two-mode Coupling drive system of electric motor vehicle characterized by comprising first motor, the second motor, first Clutch, second clutch, third clutch, the first lock device, the second lock device and simple planetary arrangement；Further include One actuating mechanism controls unit and the transducing signal acquiring unit being connected with the actuating mechanism controls unit, dtc signal calculate Processing unit, Vehicular status signal acquiring unit and driving mechanism；The actuating mechanism controls unit is believed by the sensing Number acquiring unit, the dtc signal calculation processing unit and the Vehicular status signal acquiring unit are current for electric vehicle Operational mode is identified, pattern switching and power distribute, and respectively drives the first motor, institute through the driving mechanism State the second motor, the first clutch, the second clutch, the third clutch, first lock device and institute The second lock device is stated, the transmission shaft of electric car is driven by the single planetary gear construction, and then drives electric car Wheel operating；
Wherein, the transducing signal acquiring unit include a vehicle speed sensor, a speed probe, respectively with the speed sense The first connected analog signal input circuit of device and the speed probe, an accelerator pedal sensor, a brake pedal pass Sensor, the second analog signal being connected respectively with the accelerator pedal sensor and brake pedal sensor input electricity Road, the signal processing being connected respectively with first analog signal input circuit and second analog signal input circuit electricity Road；
Wherein, the first motor and second motor coaxle are arranged, and pass through simple planetary arrangement and transmission shaft phase Even；The first motor is connected by the first clutch with the sun gear in the simple planetary arrangement；Described Two motors are connected by the second clutch and the third clutch with the sun gear, and second motor passes through The third clutch is connected with the planet carrier of the simple planetary arrangement；First lockable mechanism is set to the row In carrier, second lockable mechanism is set on the sun gear；
Wherein, the electric vehicle present mode of operation identification, pattern switching and power assigning process are as follows:
When electric car starting, climbing or accelerate, the actuating mechanism controls unit is provided according to the accelerator pedal sensor Signal, obtain the corresponding current single motor demand torque of the signal, and the maximum provided with the current single motor of electric car turns Square is compared；If torque capacity and the current single motor demand torque that current single motor provides mismatch, described the One motor is run simultaneously with second motor, using torque coupling namely TC mode；
When electric car even running, the actuating mechanism controls unit is sensed according to the speed probe and the speed The tach signal and speed signal that device provides, obtain and the tach signal current single motor corresponding with speed signal matching needs Revolving speed is sought, and the maximum (top) speed provided with the current single motor of electric car is compared；If the maximum that current single motor provides turns When speed is mismatched with the current single motor demand revolving speed, the first motor runs simultaneously with second motor and runs simultaneously, It is coupled using revolving speed namely SC mode；
When electric car even running, the actuating mechanism controls unit is sensed according to the speed probe and the speed The tach signal and speed signal that device provides, obtain and the tach signal current single motor corresponding with speed signal matching needs Revolving speed is sought, and the maximum (top) speed provided with the current single motor of electric car is compared；If the maximum that current single motor provides turns Speed is with the current single motor demand revolving speed when matching, using single motor operational mode namely SM1 mode or SM2 mode, and it is described SM1 mode and SM2 mode are changeable.
2. a kind of bi-motor Two-mode Coupling drive system of electric motor vehicle according to claim 1, which is characterized in that the transmission Axis is the front propeller shaft of the electric car, and the front propeller shaft passes through drive axle for power transmission a to left side for electric car front axle Right wheel.
3. a kind of bi-motor Two-mode Coupling drive system of electric motor vehicle according to claim 1, which is characterized in that described in use When TC mode, the first clutch and second clutch closure, the third clutch are disconnected, first locking Device closure, second lock device disconnect, and the first motor operates simultaneously with second motor, and simultaneously with the sun Wheel connection, torque coupling, the planet carrier are fixed at this time, and the sun gear is driving link, and the planetary gear is driven to rotate；It is described Planetary gear is as Passive part, by power transmission to transmission shaft.
4. a kind of bi-motor Two-mode Coupling drive system of electric motor vehicle according to claim 1, which is characterized in that described in use When SC mode, the first clutch closure, the third clutch is closed, and the first motor passes through the first clutch It is connected with the sun gear, second motor is connect by the third clutch with the planet carrier, second clutch Device disconnects, and first lock device and second lock device disconnect, and the first motor operates simultaneously with second motor, The planetary gear is driven to operate simultaneously, revolving speed couples at this time, by power transmission to transmission shaft.
5. a kind of bi-motor Two-mode Coupling drive system of electric motor vehicle according to claim 1, which is characterized in that described in use When SM1 mode, the first clutch closure, the first lock device is closed, and second lock device disconnects, and the planet carrier is solid Fixed, the first motor is connected by the first clutch with the sun gear, described too by first motor drive Sun wheel operating, the sun wheel drive is planetary gear operating, by power transmission to transmission shaft.
6. a kind of bi-motor Two-mode Coupling drive system of electric motor vehicle according to claim 1, which is characterized in that described in use When SM2 mode, the third clutch closure, first lock device is disconnected, the second lock device closure, the sun gear Fixed, second motor is connected by the third clutch with the planet carrier, by described in second motor drive Planet carrier operating, the planet carrier drives the planetary gear operating, by power transmission to transmission shaft.
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