EP3368798A1 - Automated manual transmission clutch with accumulator - Google Patents

Automated manual transmission clutch with accumulator

Info

Publication number
EP3368798A1
EP3368798A1 EP15907416.0A EP15907416A EP3368798A1 EP 3368798 A1 EP3368798 A1 EP 3368798A1 EP 15907416 A EP15907416 A EP 15907416A EP 3368798 A1 EP3368798 A1 EP 3368798A1
Authority
EP
European Patent Office
Prior art keywords
clutch
operatively connected
constructed
accumulator
actuation
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Withdrawn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
EP15907416.0A
Other languages
German (de)
French (fr)
Other versions
EP3368798A4 (en
Inventor
Yongfu Liu
Jeffrey J. Waterstredt
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.)
BorgWarner Inc
Original Assignee
BorgWarner Inc
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 BorgWarner Inc filed Critical BorgWarner Inc
Publication of EP3368798A1 publication Critical patent/EP3368798A1/en
Publication of EP3368798A4 publication Critical patent/EP3368798A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F16D48/02—Control by fluid pressure
    • 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
    • F16D48/066—Control of fluid pressure, e.g. using an accumulator
    • 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
    • F16D48/068—Control by electric or electronic means, e.g. of fluid pressure using signals from a manually actuated gearshift linkage
    • 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
    • F16D48/02—Control by fluid pressure
    • F16D2048/0203—Control by fluid pressure with an accumulator; Details thereof
    • 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
    • F16D48/02—Control by fluid pressure
    • F16D2048/0227—Source of pressure producing the clutch engagement or disengagement action within a circuit; Means for initiating command action in power assisted devices
    • F16D2048/023—Source of pressure producing the clutch engagement or disengagement action within a circuit; Means for initiating command action in power assisted devices by pedal actuation
    • 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
    • F16D48/02—Control by fluid pressure
    • F16D2048/0227—Source of pressure producing the clutch engagement or disengagement action within a circuit; Means for initiating command action in power assisted devices
    • F16D2048/0233—Source of pressure producing the clutch engagement or disengagement action within a circuit; Means for initiating command action in power assisted devices by rotary pump actuation
    • 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
    • F16D48/02—Control by fluid pressure
    • F16D2048/0227—Source of pressure producing the clutch engagement or disengagement action within a circuit; Means for initiating command action in power assisted devices
    • F16D2048/0233—Source of pressure producing the clutch engagement or disengagement action within a circuit; Means for initiating command action in power assisted devices by rotary pump actuation
    • F16D2048/0245—Electrically driven rotary pumps
    • 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
    • F16D48/02—Control by fluid pressure
    • F16D2048/0257—Hydraulic circuit layouts, i.e. details of hydraulic circuit elements or the arrangement thereof
    • F16D2048/0263—Passive valves between pressure source and actuating cylinder, e.g. check valves or throttle valves
    • 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
    • F16D48/02—Control by fluid pressure
    • F16D2048/0257—Hydraulic circuit layouts, i.e. details of hydraulic circuit elements or the arrangement thereof
    • F16D2048/0266—Actively controlled valves between pressure source and actuation cylinder
    • 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
    • F16D48/02—Control by fluid pressure
    • F16D2048/0257—Hydraulic circuit layouts, i.e. details of hydraulic circuit elements or the arrangement thereof
    • F16D2048/0269—Single valve for switching between fluid supply to actuation cylinder or draining to the sump
    • 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
    • F16D2500/102—Actuator
    • F16D2500/1026—Hydraulic
    • 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
    • F16D2500/1081—Actuation type
    • F16D2500/1082—Manual transmission
    • 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
    • F16D2500/31413—Clutch 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
    • F16D2500/316—Other signal inputs not covered by the groups above
    • 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
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/0021—Generation or control of line pressure
    • F16H61/0025—Supply of control fluid; Pumps therefor
    • F16H61/0031—Supply of control fluid; Pumps therefor using auxiliary pumps, e.g. pump driven by a different power source than the engine
    • 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
    • F16H—GEARING
    • F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
    • F16H63/40—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism comprising signals other than signals for actuating the final output mechanisms
    • F16H63/46—Signals to a clutch outside the gearbox

Definitions

  • the field to which the disclosure generally relates to includes clutches.
  • a vehicle may include an automated manual transmission clutch system.
  • a number of variations may include a hydraulic control system for automating the control of a clutch in a manual transmission vehicle comprising: a clutch for engaging and disengaging an engine from a transmission; an actuation piston operatively connected to the clutch constructed and arranged to actuate the clutch; a hydraulic pump constructed and arranged to supply oil to the system; an accumulator operatively connected to the hydraulic pump constructed and arranged to store a volume of oil under pressure; and a solenoid valve operatively connected to the actuation piston constructed and arranged to control a flow of oil to and from the actuation piston.
  • a number of variations may include a method for automating the control of a clutch in a manual transmission comprising: providing a hydraulic pump operatively connected to an accumulator and a solenoid, a piston operatively connected to the solenoid and a clutch; supplying oil from the hydraulic pump; storing oil under pressure in the accumulator; controlling a flow of the oil to and from the piston to engage and disengage the clutch; and increasing an actuation speed of the piston and the clutch using the
  • FIG. 1 illustrates a schematic of an automated manual transmission clutch system according to a number of variations.
  • an automated manual transmission vehicle may include one or more automated manual transmission clutch systems 1 0.
  • an automated manual transmission clutch system 10 may include a no-pedal manual transmission clutch.
  • a no-pedal manual transmission clutch may include a series of electronics to automatically trigger a clutch system 10 or may allow a driver to manually trigger the clutch system 10 using a shifter 16 so that a driver may manually change gears without the driver having to manually depress a clutch pedal while changing the gears.
  • an automated manual transmission clutch system 10 may include an electronic clutch pedal 16 which may eliminate the typical hydraulic connection between the pedal and clutch itself.
  • the electronics sense the pedal position and communicate that information to an ECU 14 for use in controlling the automated manual clutch 12.
  • This variation allows for the vehicle to be driven as a traditional manual transmission, wherein the driver has full control of the clutch 12 through the electronic pedal 16 or as an automated manual transmission clutch 12 wherein the ECU 14 has control of the clutch 12.
  • an automated manual transmission clutch system 1 0 may be used to transmit or prevent the flow of power from the engine of the vehicle to the transmission of the vehicle.
  • a clutch 1 2 may comprise a single plate clutch, a variation of which is illustrated in FIG. 1 , or a multi-plate clutch.
  • the clutch 1 2 may be in an "ON" mode, an OFF" mode, or a "transitional" mode.
  • the clutch 12 when the clutch 12 is in an ON mode, the engine and the transmission may be engaged which may allow torque to be applied from the engine to the wheels of the vehicle.
  • the clutch 12 When the clutch 12 is in an OFF mode, the clutch 12 may disconnect the engine from the transmission and wheels which may allow the driver to shift gears. In a number of variations, when the clutch 12 is in a transitional mode, the clutch 12 may be in a condition which is neither in a fully ON or OFF mode and may transmit partial power between the engine and the transmission in order to comfortably match the speed of the engine and transmission and smoothly begin transmitting torque from the engine to the wheels after shifting gears. In a number of variations, the automated manual transmission clutch system 1 0 may be controlled automatically by an electronic control unit (ECU) 14 and may be triggered automatically by control logic or may be manually triggered by the driver using a shifter or electronic pedal 16.
  • ECU electronice control unit
  • the ECU 14 may be operatively attached to the automated manual transmission clutch system 10.
  • the ECU 14 may receive and process input from various sensors in light of stored instructions and/or data, and transmit output signals to various actuators.
  • the ECU 14 used may be dedicated to control the automated manual transmission clutch system 10 or the ECU 14 used may already exist in the vehicle and may be used for the automated manual transmission clutch system 10 as well as for other purposes.
  • the automated manual transmission clutch system 10 may include a hydraulic control system 18 which may be used to automate the control of the clutch 12.
  • the hydraulic control system 18 may include a hydraulic pump 20 which may be operatively connected to an accumulator 22.
  • the accumulator 22 may be constructed and arranged to store a volume of oil under pressure.
  • the accumulator may be constructed in any number of variations including, but not limited to, with a spring and piston, gas and bladder, or other combination.
  • the hydraulic pump 20 may be constructed and arranged to charge the accumulator 22. Any number of hydraulic pumps 20 may be used. In one variation, the hydraulic pump 20 may be driven by an electric motor 24.
  • a flow control solenoid 26 may be operatively connected to the accumulator 22 and may be constructed and arranged to draw flow and pressure from the accumulator 22 to control an actuation piston 28 which may be operatively connected to the clutch 12 of the automated manual transmission system 10.
  • the clutch 12 may be a normally closed clutch.
  • the actuation piston 28 may engage a mechanical linkage 34 which may open or release the clutch 12 to disengage the clutch 12.
  • a check valve 30 may be operatively connected to the hydraulic control system 1 8 and may be located between the accumulator 22 and the flow control solenoid 26. Any number of check valves 30 may be used including, but not limited to, a ball check valve.
  • the check valve 30 may be constructed and arranged to prevent back flow from the accumulator 22 and/or the actuation piston 28 to the hydraulic pump 20.
  • the hydraulic control system 18 may also include a pressure sensor 32 which may be operatively connected to the accumulator 22.
  • the pressure sensor 32 may be constructed and arranged to monitor the fill status of the accumulator 22. Because the pressure in the accumulator 22 is higher as it fills and compresses the spring member, it provides a good indication of the fill state of the accumulator 22.
  • the pressure sensor 32 may relay the fill status of the accumulator 22 to the ECU 14.
  • the hydraulic pump 20, the electric motor 24, and/or the solenoid may also be operatively connected to the ECU 14 so that the ECU 14 may control actuation of the clutch 12.
  • the ECU 14 may automatically control the actuation of the clutch 1 2.
  • a shifter or electronic pedal 16 may be operatively connected to the ECU 14 and may allow a driver to manually trigger actuation of the clutch 1 2.
  • the use of the accumulator 22 may allow for a higher instantaneous flow of oil than a pump alone may provide which may allow for accelerated clutch 12 disengagement. This may be desirable in a vehicle system where shifting is accomplished without a clutch pedal or in a system having a clutch pedal, when the clutch pedal is disabled or inadvertently neglected by an inexperienced manual transmission driver.
  • Variation 1 may include a hydraulic control system for automating the control of a clutch in a manual transmission vehicle comprising: a clutch for engaging and disengaging an engine from a transmission; an actuation piston operatively connected to the clutch constructed and arranged to actuate the clutch; a hydraulic pump constructed and arranged to supply oil to the system; an accumulator operatively connected to the hydraulic pump constructed and arranged to store a volume of oil under pressure; and a solenoid valve operatively connected to the actuation piston constructed and arranged to control a flow of oil to and from the actuation piston.
  • Variation 2 may include a hydraulic control system as set forth in Variation 1 further comprising a check valve constructed and arranged to prevent back flow from at least one of the accumulator or the actuation piston to the hydraulic pump.
  • Variation 3 may include a hydraulic control system as set forth in any of Variations 1 -2 further comprising a pressure sensor constructed and arranged to monitor a fill condition of the accumulator.
  • Variation 4 may include a hydraulic control system as set forth in any of Variations 1 -3 further comprising an electric motor operatively connected to the hydraulic pump which drives the hydraulic pump.
  • Variation 5 may include a hydraulic control system as set forth in any of Variations 1 -4 wherein the clutch is a no-pedal automated manual transmission clutch.
  • Variation 6 may include a hydraulic control system as set forth in any of Variations 1 -5 further comprising an electronic control unit operatively connected to the clutch constructed and arranged to automatically control actuation of the clutch.
  • Variation 7 may include a hydraulic control system as set forth in any of Variations 1 -6 further comprising an electronic control unit operatively connected to the clutch constructed and arranged to control actuation of the clutch, and a shifter operatively connected to the electronic control unit constructed and arranged to manually trigger actuation of the clutch through the electronic control unit.
  • Variation 8 may include a hydraulic control system as set forth in any of Variations 1 -6 further comprising an electronic control unit operatively connected to the clutch constructed and arranged to control actuation of the clutch, and an electronic pedal operatively connected to the electronic control unit constructed and arranged to manually trigger actuation of the clutch through the electronic control unit.
  • Variation 9 may include a method for automating the control of a clutch in a manual transmission comprising: providing a hydraulic pump operatively connected to an accumulator and a solenoid, a piston operatively connected to the solenoid and a clutch; supplying oil from the hydraulic pump; storing oil under pressure in the accumulator; controlling a flow of the oil to and from the piston to engage and disengage the clutch; and increasing an actuation speed of the piston and the clutch by using the accumulator to allow for an increased instantaneous flow of oil.
  • Variation 10 may include a method as set forth in Variation 9 further comprising preventing back flow of oil from at least one of the accumulator or the piston to the hydraulic pump using a check valve.
  • Variation 1 1 may include a method as set forth in any of Variations 9-10 further comprising monitoring an oil fill condition of the accumulator using a pressure sensor.
  • Variation 12 may include a method as set forth in any of Variations 9-1 1 further comprising driving the hydraulic pump with an electric motor.
  • Variation 13 may include a method as set forth in any of Variations 9-12 wherein the clutch is a no-pedal automated manual transmission clutch.
  • Variation 14 may include a method as set forth in any of Variations 9-13 further comprising controlling the clutch automatically with an electronic control unit.
  • Variation 15 may include a method as set forth in any of Variations 9-1 3 further comprising triggering the clutch manually with a shifter operatively connected to an electronic control unit.
  • Variation 16 may include a method as set forth in any of Variations 9-13 further comprising triggering the clutch manually with an electronic pedal.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Abstract

A hydraulic control system for automating the control of a clutch in a manual transmission vehicle comprising: a clutch for engaging and disengaging an engine from a transmission; an actuation piston operatively connected to the clutch constructed and arranged to actuate the clutch; a hydraulic pump constructed and arranged to supply oil to the system; an accumulator operatively connected to the hydraulic pump constructed and arranged to store a volume of oil under pressure; and a solenoid valve operatively connected to the actuation piston constructed and arranged to control a flow of oil to and from the actuation piston.

Description

AUTOMATED MANUAL TRANSMISSION CLUTCH WITH ACCUMULATOR
TECHNICAL FIELD
[0001] The field to which the disclosure generally relates to includes clutches.
BACKGROUND
[0002] A vehicle may include an automated manual transmission clutch system.
SUMMARY OF ILLUSTRATIVE VARIATIONS
[0003] A number of variations may include a hydraulic control system for automating the control of a clutch in a manual transmission vehicle comprising: a clutch for engaging and disengaging an engine from a transmission; an actuation piston operatively connected to the clutch constructed and arranged to actuate the clutch; a hydraulic pump constructed and arranged to supply oil to the system; an accumulator operatively connected to the hydraulic pump constructed and arranged to store a volume of oil under pressure; and a solenoid valve operatively connected to the actuation piston constructed and arranged to control a flow of oil to and from the actuation piston.
[0004] A number of variations may include a method for automating the control of a clutch in a manual transmission comprising: providing a hydraulic pump operatively connected to an accumulator and a solenoid, a piston operatively connected to the solenoid and a clutch; supplying oil from the hydraulic pump; storing oil under pressure in the accumulator; controlling a flow of the oil to and from the piston to engage and disengage the clutch; and increasing an actuation speed of the piston and the clutch using the
accumulator to allow for an increased instantaneous flow of oil.
[0005] Other illustrative variations within the scope of the invention will become apparent from the detailed description provided hereinafter. It should be understood that the detailed description and specific examples, while disclosing variations within the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0006] Select examples of variations within the scope of the invention will become more fully understood from the detailed description and the accompanying drawing, wherein:
[0007] FIG. 1 illustrates a schematic of an automated manual transmission clutch system according to a number of variations.
DETAILED DESCRIPTION OF ILLUSTRATIVE VARIATIONS
[0008] The following description of the variations is merely illustrative in nature and is in no way intended to limit the scope of the invention, its application, or uses.
[0009] Referring to FIG. 1 , in a number of variations, an automated manual transmission vehicle may include one or more automated manual transmission clutch systems 1 0. In one variation, an automated manual transmission clutch system 10 may include a no-pedal manual transmission clutch. A no-pedal manual transmission clutch may include a series of electronics to automatically trigger a clutch system 10 or may allow a driver to manually trigger the clutch system 10 using a shifter 16 so that a driver may manually change gears without the driver having to manually depress a clutch pedal while changing the gears.
[0010] In another variation, an automated manual transmission clutch system 10 may include an electronic clutch pedal 16 which may eliminate the typical hydraulic connection between the pedal and clutch itself. In this variation, the electronics sense the pedal position and communicate that information to an ECU 14 for use in controlling the automated manual clutch 12. This variation allows for the vehicle to be driven as a traditional manual transmission, wherein the driver has full control of the clutch 12 through the electronic pedal 16 or as an automated manual transmission clutch 12 wherein the ECU 14 has control of the clutch 12.
[0011] In a number of variations, an automated manual transmission clutch system 1 0 may be used to transmit or prevent the flow of power from the engine of the vehicle to the transmission of the vehicle. In a number of variations, a clutch 1 2 may comprise a single plate clutch, a variation of which is illustrated in FIG. 1 , or a multi-plate clutch. In a number of variations, the clutch 1 2 may be in an "ON" mode, an OFF" mode, or a "transitional" mode. In a number of variations, when the clutch 12 is in an ON mode, the engine and the transmission may be engaged which may allow torque to be applied from the engine to the wheels of the vehicle. When the clutch 12 is in an OFF mode, the clutch 12 may disconnect the engine from the transmission and wheels which may allow the driver to shift gears. In a number of variations, when the clutch 12 is in a transitional mode, the clutch 12 may be in a condition which is neither in a fully ON or OFF mode and may transmit partial power between the engine and the transmission in order to comfortably match the speed of the engine and transmission and smoothly begin transmitting torque from the engine to the wheels after shifting gears. In a number of variations, the automated manual transmission clutch system 1 0 may be controlled automatically by an electronic control unit (ECU) 14 and may be triggered automatically by control logic or may be manually triggered by the driver using a shifter or electronic pedal 16.
[0012] In a number of variations, the ECU 14 may be operatively attached to the automated manual transmission clutch system 10. In a number of variations, the ECU 14 may receive and process input from various sensors in light of stored instructions and/or data, and transmit output signals to various actuators. In a number of variations, the ECU 14 used may be dedicated to control the automated manual transmission clutch system 10 or the ECU 14 used may already exist in the vehicle and may be used for the automated manual transmission clutch system 10 as well as for other purposes.
[0013] Referring again to FIG. 1 , in a number of variations, the automated manual transmission clutch system 10 may include a hydraulic control system 18 which may be used to automate the control of the clutch 12. In a number of variations, the hydraulic control system 18 may include a hydraulic pump 20 which may be operatively connected to an accumulator 22. The accumulator 22 may be constructed and arranged to store a volume of oil under pressure. The accumulator may be constructed in any number of variations including, but not limited to, with a spring and piston, gas and bladder, or other combination. The hydraulic pump 20 may be constructed and arranged to charge the accumulator 22. Any number of hydraulic pumps 20 may be used. In one variation, the hydraulic pump 20 may be driven by an electric motor 24. A flow control solenoid 26 may be operatively connected to the accumulator 22 and may be constructed and arranged to draw flow and pressure from the accumulator 22 to control an actuation piston 28 which may be operatively connected to the clutch 12 of the automated manual transmission system 10. The clutch 12 may be a normally closed clutch. In a number of variations, the actuation piston 28 may engage a mechanical linkage 34 which may open or release the clutch 12 to disengage the clutch 12. In a number of variations, a check valve 30 may be operatively connected to the hydraulic control system 1 8 and may be located between the accumulator 22 and the flow control solenoid 26. Any number of check valves 30 may be used including, but not limited to, a ball check valve. The check valve 30 may be constructed and arranged to prevent back flow from the accumulator 22 and/or the actuation piston 28 to the hydraulic pump 20. In a number of variations, the hydraulic control system 18 may also include a pressure sensor 32 which may be operatively connected to the accumulator 22. The pressure sensor 32 may be constructed and arranged to monitor the fill status of the accumulator 22. Because the pressure in the accumulator 22 is higher as it fills and compresses the spring member, it provides a good indication of the fill state of the accumulator 22. The pressure sensor 32 may relay the fill status of the accumulator 22 to the ECU 14. In a number of variations, the hydraulic pump 20, the electric motor 24, and/or the solenoid may also be operatively connected to the ECU 14 so that the ECU 14 may control actuation of the clutch 12. In one variation, the ECU 14 may automatically control the actuation of the clutch 1 2. In another variation, a shifter or electronic pedal 16 may be operatively connected to the ECU 14 and may allow a driver to manually trigger actuation of the clutch 1 2.
[0014] In a number of variations, the use of the accumulator 22 may allow for a higher instantaneous flow of oil than a pump alone may provide which may allow for accelerated clutch 12 disengagement. This may be desirable in a vehicle system where shifting is accomplished without a clutch pedal or in a system having a clutch pedal, when the clutch pedal is disabled or inadvertently neglected by an inexperienced manual transmission driver.
[0015] The following description of variants is only illustrative of components, elements, acts, products and methods considered to be within the scope of the invention and are not in any way intended to limit such scope by what is specifically disclosed or not expressly set forth. The components, elements, acts, products and methods as described herein may be combined and rearranged other than as expressly described herein and still are considered to be within the scope of the invention.
[0016] Variation 1 may include a hydraulic control system for automating the control of a clutch in a manual transmission vehicle comprising: a clutch for engaging and disengaging an engine from a transmission; an actuation piston operatively connected to the clutch constructed and arranged to actuate the clutch; a hydraulic pump constructed and arranged to supply oil to the system; an accumulator operatively connected to the hydraulic pump constructed and arranged to store a volume of oil under pressure; and a solenoid valve operatively connected to the actuation piston constructed and arranged to control a flow of oil to and from the actuation piston.
[0017] Variation 2 may include a hydraulic control system as set forth in Variation 1 further comprising a check valve constructed and arranged to prevent back flow from at least one of the accumulator or the actuation piston to the hydraulic pump.
[0018] Variation 3 may include a hydraulic control system as set forth in any of Variations 1 -2 further comprising a pressure sensor constructed and arranged to monitor a fill condition of the accumulator.
[0019] Variation 4 may include a hydraulic control system as set forth in any of Variations 1 -3 further comprising an electric motor operatively connected to the hydraulic pump which drives the hydraulic pump.
[0020] Variation 5 may include a hydraulic control system as set forth in any of Variations 1 -4 wherein the clutch is a no-pedal automated manual transmission clutch.
[0021] Variation 6 may include a hydraulic control system as set forth in any of Variations 1 -5 further comprising an electronic control unit operatively connected to the clutch constructed and arranged to automatically control actuation of the clutch.
[0022] Variation 7 may include a hydraulic control system as set forth in any of Variations 1 -6 further comprising an electronic control unit operatively connected to the clutch constructed and arranged to control actuation of the clutch, and a shifter operatively connected to the electronic control unit constructed and arranged to manually trigger actuation of the clutch through the electronic control unit.
[0023] Variation 8 may include a hydraulic control system as set forth in any of Variations 1 -6 further comprising an electronic control unit operatively connected to the clutch constructed and arranged to control actuation of the clutch, and an electronic pedal operatively connected to the electronic control unit constructed and arranged to manually trigger actuation of the clutch through the electronic control unit.
[0024] Variation 9 may include a method for automating the control of a clutch in a manual transmission comprising: providing a hydraulic pump operatively connected to an accumulator and a solenoid, a piston operatively connected to the solenoid and a clutch; supplying oil from the hydraulic pump; storing oil under pressure in the accumulator; controlling a flow of the oil to and from the piston to engage and disengage the clutch; and increasing an actuation speed of the piston and the clutch by using the accumulator to allow for an increased instantaneous flow of oil.
[0025] Variation 10 may include a method as set forth in Variation 9 further comprising preventing back flow of oil from at least one of the accumulator or the piston to the hydraulic pump using a check valve.
[0026] Variation 1 1 may include a method as set forth in any of Variations 9-10 further comprising monitoring an oil fill condition of the accumulator using a pressure sensor.
[0027] Variation 12 may include a method as set forth in any of Variations 9-1 1 further comprising driving the hydraulic pump with an electric motor. [0028] Variation 13 may include a method as set forth in any of Variations 9-12 wherein the clutch is a no-pedal automated manual transmission clutch.
[0029] Variation 14 may include a method as set forth in any of Variations 9-13 further comprising controlling the clutch automatically with an electronic control unit.
[0030] Variation 15 may include a method as set forth in any of Variations 9-1 3 further comprising triggering the clutch manually with a shifter operatively connected to an electronic control unit.
[0031] Variation 16 may include a method as set forth in any of Variations 9-13 further comprising triggering the clutch manually with an electronic pedal.
[0032] The above description of select variations within the scope of the invention is merely illustrative in nature and, thus, variations or variants thereof are not to be regarded as a departure from the spirit and scope of the invention.

Claims

CLAIMS What is claimed is:
1 . A hydraulic control system for automating the control of a clutch in a manual transmission vehicle comprising:
a clutch for engaging and disengaging an engine from a transmission;
an actuation piston operatively connected to the clutch constructed and arranged to actuate the clutch;
a hydraulic pump constructed and arranged to supply oil to the system;
an accumulator operatively connected to the hydraulic pump constructed and arranged to store a volume of oil under pressure; and
a solenoid valve operatively connected to the actuation piston constructed and arranged to control a flow of oil to and from the actuation piston.
2. The hydraulic control system of claim 1 further comprising a check valve constructed and arranged to prevent back flow from at least one of the accumulator or the actuation piston to the hydraulic pump.
3. The hydraulic control system of claim 1 further comprising a pressure sensor constructed and arranged to monitor a fill condition of the accumulator.
4. The hydraulic control system of claim 1 further comprising an electric motor operatively connected to the hydraulic pump which drives the hydraulic pump.
5. The hydraulic control system of claim 1 wherein the clutch is a no-pedal automated manual transmission clutch.
6. The hydraulic control system of claim 1 further comprising an electronic control unit operatively connected to the clutch constructed and arranged to automatically control actuation of the clutch.
7. The hydraulic control system of claim 1 further comprising an electronic control unit operatively connected to the clutch constructed and arranged to control actuation of the clutch, and a shifter operatively connected to the electronic control unit constructed and arranged to manually trigger actuation of the clutch through the electronic control unit.
8. The hydraulic control system of claim 1 further comprising an electronic control unit operatively connected to the clutch constructed and arranged to control actuation of the clutch, and an electronic pedal operatively connected to the electronic control unit constructed and arranged to manually trigger actuation of the clutch through the electronic control unit.
9. A method for automating the control of a clutch in a manual transmission comprising:
providing a hydraulic pump operatively connected to an accumulator and a solenoid, a piston operatively connected to the solenoid and a clutch; supplying oil to the system from the hydraulic pump;
storing oil under pressure in the accumulator;
controlling a flow of the oil to and from the piston to engage and disengage the clutch; and
increasing an actuation speed of the piston and the clutch by using the accumulator to allow for an increased instantaneous flow of oil.
10. The method of claim 9 further comprising preventing back flow of oil from at least one of the accumulator or the piston to the hydraulic pump using a check valve.
1 1 . The method of claim 9 further comprising monitoring an oil fill condition of the accumulator using a pressure sensor.
12. The method of claim 9 further comprising driving the hydraulic pump with an electric motor.
13. The method of claim 9 wherein the system is a no-pedal automated manual transmission clutch.
14. The method of claim 9 further comprising triggering the clutch automatically with an electronic control unit.
15. The method of claim 9 further comprising triggering the clutch manually with a shifter operatively connected to an electronic control unit.
16. The method of claim 9 further comprising triggering the clutch manually with an electronic pedal operatively connected to an electronic control unit.
EP15907416.0A 2015-10-27 2015-10-27 Automated manual transmission clutch with accumulator Withdrawn EP3368798A4 (en)

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PCT/US2015/057484 WO2017074308A1 (en) 2015-10-27 2015-10-27 Automated manual transmission clutch with accumulator

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CN112032213A (en) * 2019-06-04 2020-12-04 威伯科印度有限公司 Clutch actuation system for driving operation of clutch servo
CN111692233B (en) * 2020-05-29 2022-01-07 钦州绿传科技有限公司 Hydraulic system and control method thereof
CN114704632A (en) * 2022-04-14 2022-07-05 一汽解放汽车有限公司 Mechanical automatic transmission clutch execution system and vehicle

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US5469946A (en) * 1994-02-01 1995-11-28 Nguyen; Phuong H. Clutch actuation system
JP2002147597A (en) * 2000-11-13 2002-05-22 Fuji Heavy Ind Ltd Control device for automatic transmission for vehicle
CN101479128A (en) * 2006-07-14 2009-07-08 博格华纳公司 Hydraulically actuated electronic limited slip differential for front wheel drive vehicles
US20090032360A1 (en) * 2007-08-02 2009-02-05 Tetsushi Asano Hydraulic Vehicle Clutch System and Method
US20090126360A1 (en) * 2007-11-20 2009-05-21 Bordwell Mark A Hydraulic system with accumulator assist
CN102062204B (en) * 2010-11-16 2015-07-15 浙江吉利汽车研究院有限公司 Clutch hydraulic control device of double-clutch automatic transmission
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CN108291634A (en) 2018-07-17
EP3368798A4 (en) 2019-07-10

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