GB2484940A - Drive system for electric vehicle using variable speed gearboxes - Google Patents

Drive system for electric vehicle using variable speed gearboxes Download PDF

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Publication number
GB2484940A
GB2484940A GB1018075.0A GB201018075A GB2484940A GB 2484940 A GB2484940 A GB 2484940A GB 201018075 A GB201018075 A GB 201018075A GB 2484940 A GB2484940 A GB 2484940A
Authority
GB
United Kingdom
Prior art keywords
gearbox
gear
shaft
gears
clutch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB1018075.0A
Other versions
GB201018075D0 (en
Inventor
Christopher Stanford Baylis
Ryan Ellis Maughan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MSI HOLDINGS Ltd
Original Assignee
MSI HOLDINGS Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by MSI HOLDINGS Ltd filed Critical MSI HOLDINGS Ltd
Priority to GB1018075.0A priority Critical patent/GB2484940A/en
Publication of GB201018075D0 publication Critical patent/GB201018075D0/en
Publication of GB2484940A publication Critical patent/GB2484940A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • 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
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
    • B60L11/18—
    • 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
    • B60L15/2036—Electric differentials, e.g. for supporting steering vehicles
    • 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
    • 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
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Arrangement And Driving Of Transmission Devices (AREA)

Abstract

A drive system for an electric vehicle consists of two or more motors A, D with a variable speed gearbox B, E on each motor connected independently to the road wheels via a drive shaft C, F. Each gearbox has two or more ratios which can be selected by engaging a clutch mechanism on each gear. The gears remain permanently meshed, engaging the clutches controls the gear ratio and torque path through the gearbox. Using a pre-meshed gear system allows the gear change to be achieved quickly and synchronised across all of the motor and gearbox units on the vehicle. The gears may be of a spur or helical type. The gearbox consists of primary shaft G, secondary shaft H and output shaft I. The gears are fixed to the secondary shaft using a clutch arrangement. When the clutch is disengaged the gear is free to rotate on the shaft.

Description

Design for a 2 or more motor electric vehicle drive system with a variable speed gearbox on each motor The present invention relates to an arrangement for the drive system of an electric vehicle consisting of 2 or more motors driving through separate variable ratio gearboxes to the road wheels. The motor is either an induction or permanent magnet AC type motor.
Each wheel is driven by an individual motor (A, B). This could be 2 wheel drive using 2 motors or 4 wheel drive using 4 motors. Each motor is connected to a discrete variable ratio gearbox unit (B, E). The output of the gearbox is connected to the road wheels of the vehicle via a drive shaft (C, F). The motor and gearbox is mounted inboard of the driven wheels.
Each gearbox has 2 or more ratios which can be selected by engaging a clutch device on each driven gear. The gears remain permanently meshed, but are only connected to the shaft to transmit torque by engaging the clutch. Using a pre-meshed gear system allows the gear change to be achieved quickly and synchronised across all of the motor and gearbox units on the vehicle.
The gears shall be of either spur or helical type. The gearbox consists of a primary shaft (G), secondary shaft (H) and an output shaft (I). The gears are fixed to the secondary shaft using a clutch arrangement. When the clutch is disengaged the gear is free to rotate on the shaft. When the clutch is locked the gear is fixed to the shaft.
The design of the gearbox allows for the gear changing to be synchronised between the gearboxes. The clutches are actuated by an electromechanical or hydraulic actuator or magnetic system. The actuator arrangement drives a wedge into the clutch which locks it into position or energises an electro magnet which engages the clutch.
The changing of engaged gears is controlled by a central electronic controller to ensure gear shifting is controlled accurately and synchronised between the gearboxes. The electronic control system also controls the torque output of the motors in response to driver demand and driving conditions. The correct functioning of the gearbox is checked by the control algorithm shown in drawings. The controller momentarily limits the torque output of the electric motor as the gear ratio is changed by disengaging and engaging clutches to allow a smooth gear change. The motor speed and output shaft speed is monitored continuously, by monitoring the motor speed and output shaft speed the controller can detect when the gearbox is in gear and when it is transition ing between gears.
The output of each gearbox is connected to the road wheels of the vehicle via a drive shaft. The motor and gearbox assemblies are mounted in-board of the wheels of the vehicle. The output of the gearbox may be connected to a further fixed reduction ratio gearbox of either a spur, helical gear or toothed belt drive.
A vehicle with 2 motors would drive 2 road wheels giving a 2 wheel drive vehicle. A vehicle with 4 motors would drive 4 road wheels giving a four wheel drive vehicle.
GB1018075.0A 2010-10-26 2010-10-26 Drive system for electric vehicle using variable speed gearboxes Withdrawn GB2484940A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1018075.0A GB2484940A (en) 2010-10-26 2010-10-26 Drive system for electric vehicle using variable speed gearboxes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1018075.0A GB2484940A (en) 2010-10-26 2010-10-26 Drive system for electric vehicle using variable speed gearboxes

Publications (2)

Publication Number Publication Date
GB201018075D0 GB201018075D0 (en) 2010-12-08
GB2484940A true GB2484940A (en) 2012-05-02

Family

ID=43365541

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1018075.0A Withdrawn GB2484940A (en) 2010-10-26 2010-10-26 Drive system for electric vehicle using variable speed gearboxes

Country Status (1)

Country Link
GB (1) GB2484940A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105459781A (en) * 2015-12-31 2016-04-06 温岭市海风差速器有限公司 Multi-motor driving system of electric automobile
DE102018204291A1 (en) * 2018-03-21 2019-09-26 Audi Ag Drive device for an electrically operated vehicle

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020023791A1 (en) * 2000-08-30 2002-02-28 Honda Giken Kogyo Kabushiki Kaisha Control device for in-wheel transmissions in an electric vehicle
US20080236908A1 (en) * 2007-03-29 2008-10-02 Lon Cooper Electric powertrain system with planetary drive

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020023791A1 (en) * 2000-08-30 2002-02-28 Honda Giken Kogyo Kabushiki Kaisha Control device for in-wheel transmissions in an electric vehicle
US20080236908A1 (en) * 2007-03-29 2008-10-02 Lon Cooper Electric powertrain system with planetary drive

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105459781A (en) * 2015-12-31 2016-04-06 温岭市海风差速器有限公司 Multi-motor driving system of electric automobile
DE102018204291A1 (en) * 2018-03-21 2019-09-26 Audi Ag Drive device for an electrically operated vehicle
DE102018204291B4 (en) * 2018-03-21 2020-09-10 Audi Ag Driving device for an electrically operated vehicle

Also Published As

Publication number Publication date
GB201018075D0 (en) 2010-12-08

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732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20140515 AND 20140521

WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)