WO2024256950A1 - Système de freinage - Google Patents

Système de freinage Download PDF

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Publication number
WO2024256950A1
WO2024256950A1 PCT/IB2024/055659 IB2024055659W WO2024256950A1 WO 2024256950 A1 WO2024256950 A1 WO 2024256950A1 IB 2024055659 W IB2024055659 W IB 2024055659W WO 2024256950 A1 WO2024256950 A1 WO 2024256950A1
Authority
WO
WIPO (PCT)
Prior art keywords
pedal
sensor
brake pedal
braking system
haptic feedback
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.)
Pending
Application number
PCT/IB2024/055659
Other languages
English (en)
Inventor
Martina Truffello
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.)
Brembo SpA
Original Assignee
Brembo SpA
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 Brembo SpA filed Critical Brembo SpA
Publication of WO2024256950A1 publication Critical patent/WO2024256950A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00—Brake-action initiating means
    • B60T7/02—Brake-action initiating means for personal initiation
    • B60T7/04—Brake-action initiating means for personal initiation foot actuated
    • B60T7/042—Brake-action initiating means for personal initiation foot actuated by electrical means, e.g. using travel or force sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/662—Electrical control in fluid-pressure brake systems characterised by specified functions of the control system components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/66—Electrical control in fluid-pressure brake systems
    • B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
    • B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
    • B60T13/745—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder

Definitions

  • the present invention relates to a braking system of the Brake-By-Wire ("BBW") type of vehicles with two or more wheels actuatable by a driver by means of a brake pedal or lever.
  • BBW Brake-By-Wire
  • Stiffness curve refers to the relationship between the displacement of the brake pedal or lever along its stroke and the respective reaction force applied by the simulator device on the brake pedal or lever, and thus by the brake pedal or lever on the driver.
  • Braking feel simulator devices comprising a master cylinder connected to the brake pedal are known.
  • the master cylinder comprises a float, which is moved by the driver's mechanical action on the brake pedal and has the function of pressurizing the hydraulic fluid.
  • the hydraulic fluid is contained in a reservoir fluidically connected to the master cylinder by means of a hydraulic connection.
  • the master cylinder is fluidically connected by means of a further hydraulic connection to an absorber, which is a device generally provided with a plurality of elastic elements arranged in series and in parallel, configured to apply an elastic reaction force against a brake pedal actuation.
  • an absorber which is a device generally provided with a plurality of elastic elements arranged in series and in parallel, configured to apply an elastic reaction force against a brake pedal actuation.
  • both BBW and conventional hydraulic braking systems do not allow transmitting special alerts or warning signals related to the braking system itself to the driver, such as a parking brake engagement or disengagement warning.
  • braking feel simulator devices which comprise means configured to provide and transmit haptic signals and feedback, in particular vibrations, to the driver, such as the trembling of the brake pedal of a conventional braking system which is triggered when the ABS intervenes.
  • the inventors are also aware of braking feel simulator devices provided with sensors configured to detect various parameters related to the braking system, such as the braking system actuation force applied by the driver to the brake pedal or lever, or the vibrations transmitted by the haptic signal transmission and feedback means.
  • a critical issue of such braking systems known to the inventors is in ensuring a correct sensor measurement of the parameters related to the braking system, such as the braking force applied by the driver and the vibrations transmitted by the haptic signal and feedback transmission means.
  • a further criticality of the braking systems known to the inventors is in the attempt to reduce the size and bulk of the integration of the sensors and the haptic signal and feedback transmission means.
  • parameters related to braking system actuation such as the braking system actuation force applied by the driver to the brake pedal or lever, or the vibrations transmitted by the haptic signal transmission and feedback means
  • FIG. 1 is a front perspective view of a component of a braking system according to an embodiment of the invention.
  • figure 2 is a rear perspective view of the component shown in figure 1 ;
  • FIG. 3 is a side view of a component of a braking system according to an embodiment of the invention.
  • figure 4 is a front view of the component in figure 3;
  • figure 5 is a rear view of the component shown in figure 3;
  • FIG. 6 is a longitudinal section view of a component of a braking system according to an embodiment of the invention.
  • figure 7 is a detail view of the longitudinal section shown in figure 6;
  • figure 8 is a longitudinal section view of the component shown in figure 6;
  • figure 9 is a detail view of the longitudinal section shown in figure 8.
  • figure 10 is an exploded view of the component of a braking system shown in figure 6;
  • FIG. 1 1 diagrammatically shows a braking system, according to an embodiment of the invention
  • FIG. 12 diagrammatically shows a braking system, according to a further embodiment of the invention
  • FIG. 13 diagrammatically shows a braking system, according to a further embodiment of the invention.
  • FIG. 14 diagrammatically shows a braking system, according to a further embodiment of the invention.
  • FIG. 15 is a front perspective view of a component of a braking system according to an embodiment of the invention.
  • FIG. 16 is a front perspective view of a component of a braking system according to an embodiment of the invention.
  • FIG. 17 is a front perspective view of a connecting system according to an embodiment of the invention.
  • the present invention relates to a braking system of the Brake-By-Wire ("BBW") type of vehicles with two or more wheels actuatable by a driver by means of a brake pedal or lever. Therefore, in the present description, the term “brake pedal” means indistinctly both a brake pedal for motor vehicles and the like and a brake lever for motorcycles, mopeds, and the like, unless otherwise specified. Moreover, “electrically connected” and “electrically connected” means a connection for the transmission of electric power and/or electric signals.
  • a braking feel simulator device is generally indicated by reference numeral 1 .
  • the braking system 1 is a braking system of the "BBW” type.
  • the braking system 1 comprises a braking feel simulator device 2.
  • the braking system 1 comprises a brake pedal 3 operatively connected to the braking feel simulator device 2.
  • the braking system 1 is configured so that an actuation of the brake pedal 3 by a driver, in particular an actuation force applied by the driver on the brake pedal 3, corresponds to a reaction force applied by the braking feel simulator device 2 to the brake pedal 3 as opposed to an actuation of the brake pedal 3.
  • the braking system 1 comprises at least a first body 4 and a second body 5.
  • the first body 4 and a second body 5 are mechanically connected to each other so that the actuating force applied by the driver to the brake pedal 3 is transferred from the first body 4 towards the second body 5, or vice versa from the second body 5 towards the first body 4.
  • the braking system 1 comprises a signaling and detection system 6.
  • the signaling and detection system 6 comprises a haptic feedback actuator 7.
  • the haptic feedback actuator 7 is configured to transmit haptic feedback to the brake pedal 3.
  • the haptic feedback actuator 7 can thus transmit haptic feedback, e.g., a vibration, to the driver.
  • Haptic feedback actuator 7 also means a "tactile feedback actuator”.
  • the signaling and detection system 6 further comprises a sensor 8.
  • the sensor 8 is configured to detect parameters related to the braking system
  • the parameters related to the braking system 1 detectable by the sensor 8 comprise the actuating force applied by the driver to the brake pedal 3 and the haptic feedback transmitted from the haptic feedback actuator 7 to the brake pedal 3.
  • the signaling and detection system 6 further comprises a transmission element 9.
  • the transmission element 9 is configured to transmit the haptic feedback generated by the haptic feedback actuator 7 to the sensor 8.
  • the transmission element 9 is configured to transfer the actuating force applied by the driver on the brake pedal 3 between the first body 4 and the second body 5.
  • the haptic feedback actuator 7 and the transmission element 9 are positioned at the first body 4.
  • the sensor 8 is located at the second body 5.
  • the transmission element 9 leads from the first housing 4 and is positioned abutting against the sensor 8.
  • the transmission element 9 thus defines a clearance 10 between the first body 4 and the second body 5.
  • the braking system 1 further comprises connecting means 12.
  • the connecting means 12 are configured to connect the first body 4 to the second body 5.
  • the braking system 1 comprises damping means 11 .
  • the damping means 11 are positioned to be interposed between the first body 4 and the second body 5.
  • the damping means 1 1 are configured to damp movements or vibrations transmissible, through the connecting means 12, between the first body 4 and the second body 5.
  • the braking system 1 thus configured allows returning haptic signals and feedback, such as the shaking or vibration, which is triggered when the ABS system intervenes, to the driver by transmitting appropriate haptic feedback from the haptic feedback actuator 7 to the brake pedal 3.
  • the braking system 1 thus configured allows transmitting particular alerts or warning signals relating to the braking system 1 itself, such as an electronic parking brake (“EPB”) engagement or disengagement alert or an electronic stability control (“ESC”) activation or deactivation alert, or a vehicle ignition key on and off alert, or a malfunction alert of the braking system 1 , or a regenerative braking activation or deactivation alert to the brake pedal 3, and thus to the driver.
  • EPB electronic parking brake
  • ESC electronic stability control
  • the braking system 1 allows transmitting an insufficient or excessively light braking force alert to the brake pedal 3, and thus an indication to the driver to increase the braking force, e.g., under the conditions in which the vehicle is approaching other vehicles and the current braking force is not sufficient to avoid a collision.
  • a braking system 1 thus configured allows detecting parameters related to braking system actuation, such as the braking system actuation force applied by the driver to the brake pedal or lever 3, or the vibrations transmitted by the haptic feedback actuator 7, by means of the sensor 8.
  • a braking system 1 thus configured ensures a correct reading of the parameters related to braking system actuation, such as the braking system actuation force applied by the driver to the brake pedal or lever 3, or the vibrations transmitted by the haptic feedback actuator 7, by means of the sensor 8.
  • the braking system 1 so configured ensures that the actuation force applied by the driver on the brake pedal 3 is transmitted between the first body 4 and the second body 5 through the transmission element 9 and the sensor 8. This ensures a correct reading by the sensor 8 of the actuation force applied by the driver on the brake pedal 3.
  • the damping means 11 damp any relative motions between the first body 4 and the second body 5, which would otherwise be transmissible through the connecting means 12, and thus not only through the transmission element 9 and the sensor 8, and which would thus distort the actuation force reading by the sensor 8.
  • the braking system 1 ensures that the haptic feedback generated by the haptic feedback actuator 7 is transmitted between the first body 4 and the second body 5 through the transmission element 9 and the sensor 8. This ensures a correct reading by the sensor 8 of the haptic feedback generated by the haptic feedback actuator 7.
  • the damping means 11 damps the transmission of haptic feedback between the first body 4 and the second body 5 by means of the connecting means 12, thus preventing the haptic feedback from also being transferred by means of the connecting means 12, which would distort the reading of the haptic feedback by the sensor 8.
  • the braking system 1 thus configured allows integrating a haptic feedback actuator 7 and a respective sensor 8, with reduced overall dimensions.
  • the first body 4 and the second body 5 are mechanically connected to each other so that the actuation force applied by the driver on the brake pedal 3 is transferred from the first body 4 to the second body 5.
  • the senor 8 and the transmission element 9 are positioned facing along a transmission axis 20.
  • the forces and vibrations transmitted from the transmission element 9 to the sensor 8 are mainly directed along the transmission axis 20.
  • the connecting means 12 are distinct from the transmission element 9.
  • the damping means 1 1 are positioned at the connecting means 12.
  • the connecting means 12 comprise at least one connection screw 13, preferably a plurality of connection screws 13.
  • the braking system 4 comprises at least one threaded hole 14.
  • the second body 5 comprises at least one through-hole 15.
  • the through-hole 15 is formed at the threaded hole 14 of the first body 4.
  • connection screw 13 is inserted through a respective through-hole 15 of the second body 5 and is screwed into the respective threaded hole 14 of the first body 4.
  • the first body 4 and the second body 5 are connected to each other by a plurality of connection screws 13 inserted into respective through-holes 15 of the second body 5 and screwed to respective threaded holes 14 of the first body 4.
  • the connection screw 13 comprises a threaded stem 16.
  • the threaded stem 16 extends along a screw axis 17.
  • the screw axis 17 is parallel to the transmission axis 20.
  • connection screw 13 comprises a screw head 18.
  • the screw wall 18 extends from the threaded stem 16 in a traverse direction to the screw axis 17.
  • the screw head 18 is positioned opposite to the threaded stem 16 with respect to the second body 5.
  • the damping means 11 are positioned interposed between the screw head 18 and the second body 5.
  • such a configuration hinders the transmission of vibrations generated by the haptic feedback actuator 7 from the first body 4 to the second body 5 by means of the connection screw 13.
  • the vibrations generated by the haptic feedback actuator 7 are transmitted to the first body 4 and the threaded rod 16 screwed to the first body 4, and therefore to the screw head 18.
  • the damping means 11 interposed between the screw head 18 and the second body 5 the vibrations are damped and not transferred to the second body 5 through the connection screw 13.
  • connection screw 13 comprises a backing wall 21 , extended between the screw head 18 and the threaded stem 16.
  • the backing wall 21 extends from the threaded stem 16 in a traverse direction to the screw axis 17.
  • the backing wall 21 is positioned passing through the through-hole screw 15. Moreover, the backing wall 21 is positioned passing through the clearance 10 between the first body 4 and the second body 5.
  • the backing wall 21 is positioned abutting against the first body 4.
  • the backing wall 21 is not threaded.
  • the diameter of the backing wall 21 with respect to the screw axis 15 is larger than the diameter of the threaded stem 16 and smaller than the diameter of the screw head 18.
  • the diameter of the through-hole 15 is larger than the diameter of the backing wall 21 and smaller than the diameter of the screw head 18.
  • the diameter of the through-hole 15 is substantially equal to the diameter of the backing wall 21 .
  • the damping means 11 comprise at least one ring-shaped element made of elastomeric material 19.
  • the ring-shaped element 19 made of elastomeric material is positioned about the connection screw 13, coaxial to the screw axis 17.
  • the ring-shaped element 19 made of elastomeric material is positioned against the screw head 18.
  • the ring-shaped element 19 made of elastomeric material is positioned about the braking system 21 , against the screw head 18, coaxial to the screw axis 17.
  • connection screw 13 is screwed to the first body 4 so as to pre-compress the respective ring-shaped element 19 made of elastomeric material between the screw head 18 and the second body 5.
  • the ring-shaped element made of elastomeric material 19 is an O-ring.
  • the ring-shaped element made of elastomeric material 19 is made of "EPDM" (Ethylene-Propylene Diene Monomer) rubber.
  • first body 4 and the second body 5 are connected to each other by four connection screws 13, as described above. Moreover, four respective ring-shaped elements made of elastomeric material 19 are arranged between the first body 4 and the second body 5, as described above.
  • the first body 4 comprises at least one threaded seat 22.
  • the threaded seat 22 is preferably coaxial to the transmission axis 20.
  • the transmission element 9 is a threaded pin.
  • the transmission element 9 is positioned screwed to the threaded seat 22.
  • the transmission element 9 comprises a threaded wall 23, screwed to the threaded seat 22.
  • the threaded wall 23 is coaxial to the transmission axis 20.
  • the transmission element 9 is thus connected to the first body 4 and leads from the first body 4. Moreover, the transmission element 9 faces the sensor 8.
  • the transmission element 9 thrust positioned also faces the sensor 8 and extends through the clearance 10 between the first body 4 and the second body 5.
  • the transmission element 9 comprises a thrust wall 24 configured to transmit to the sensor 8 haptic feedback generated by the haptic feedback actuator 7 and to allow a transfer of the actuating force applied by the driver to the brake pedal 3 between the first body 4 and the second body 5.
  • the thrust wall 24 is positioned to abut against the sensor 8.
  • the thrust wall 24 is substantially planar, extending in a transverse direction to the transmission axis 20.
  • the senor 8 is positioned to be connected to the second body 5, facing the transmission element 9.
  • the second body 5 comprises a sensor seat 25.
  • the sensor seat 25 is preferably coaxial to the transmission axis 20.
  • the sensor 8 is housed in the sensor seat 25 of the second body 5, facing the transmission element 9.
  • the sensor 8 is thus configured to receive a haptic feedback generated by the haptic feedback actuator 7 from the transmission element 9 and detect the actuation force applied by the driver to the brake pedal 3.
  • the senor 8 comprises a detection wall 26 abutting against the transmission element 9.
  • the detection wall 26 extends in the direction parallel to the transmission axis 20 and is positioned against the thrust wall 24 of the transmission element 9.
  • the detection wall 26 has a convex shape, abutting against the thrust wall 24.
  • a convex shape facilitates the transfer of forces and vibrations from the transmission element 9 to the sensor 8 and makes the reading of these forces and vibrations by the sensor 8 more accurate.
  • the senor 8 is either a position sensor, a pressure sensor, a force sensor, or a combination thereof.
  • the sensor 8 is either a laser position sensor, an infrared pressure sensor, an elastomeric sensor, a piezoelectric sensor, a Hall effect sensor, a magnetoresistive sensor, a linear magnetic sensor, a microelectromechanical system (“MEMS”), a fiber optic sensor, a strain gage, a proximity sensor, an eddy current sensor, a sine-cosine differential sensor, a mechanical moment sensor, or a combination thereof.
  • MEMS microelectromechanical system
  • Haptic feedback actuator 7 [00134] The haptic feedback actuator 7 is connected to the first body 4.
  • the first body 4 comprises a housing seat 27 inside.
  • the haptic feedback actuator 7 is housed inside the first body 4 in the housing seat 27.
  • the haptic feedback actuator 7 is positioned inside the housing seat 27 so as to transmit haptic feedback, in particular vibrations, to the transmission element 9 connected to the first body 4, and in particular screwed to the threaded seat 22.
  • the haptic feedback actuator 7 is configured to transmit a vibration transmitted according to one or a plurality of vibration modes, or vibration patterns, to the brake pedal 3 and the transmission element 9.
  • the haptic feedback is emitted according to a clicking vibration, an increasing or decreasing ramp vibration, a pulsed vibration, a continuous intensity vibration, a vibration interspersed with pauses of different durations, continuous intensity vibrations of different durations, vibrations at different vibration frequencies, or vibrations of different vibration intensities.
  • each vibration mode can correspond to a different signal or alert.
  • a braking system 1 so configured allows transmitting modulated signals or alerts to a driver.
  • the haptic feedback actuator 7 is a voice coil 28.
  • the haptic feedback actuator 7 is a voice coil 28, preferably of passive type, i.e., electrically powered by an electrical power source external to the voice coil 28.
  • the haptic feedback actuator 7 is positioned at comprises a plurality of voice coils 28.
  • the voice coil 28 refers to an electromagnetic device comprising a coil assembly and a magnetic ground in which, by applying an electrical voltage to the haptic feedback actuator 7 through its power supply, the actuator 7 moves in a given direction. By reversing the polarity of the applied voltage, the actuator 7 moves in the opposite direction. The vibration force generated by the actuator 7 is proportional to the current flowing through the coil assembly.
  • the haptic feedback actuator 7 is a piezoelectric actuator, an eccentric rotating mass (“ERM”) motor, a linear resonant actuator (“LRA”), a solenoid actuator, a brushless actuator, a stepper actuator, or a bass shaker actuator.
  • ECM eccentric rotating mass
  • LRA linear resonant actuator
  • solenoid actuator a brushless actuator
  • stepper actuator a stepper actuator
  • bass shaker actuator a bass shaker actuator
  • the brake pedal 3 is the brake pedal of a motor vehicle.
  • the brake pedal 3 comprises a pedal pad 29 fixed to a pedal crank 30.
  • the pedal pad 29 is fixed to an end of the pedal crank 30.
  • the opposite end of the pedal crank 30 is fixed to a hinge 35 configured to connect the pedal crank 30 to the chassis of a vehicle.
  • the brake pedal 3 is operatively connected to the braking feel simulator 2 by means of a mechanical connection device 36.
  • An actuating force applied by a driver on the brake pedal 3 is thus mechanically transferred to the braking feel simulator device 2.
  • the mechanical connection device 36 is a hinge mechanism or an articulated connection.
  • connection device 36 is configured to connect the pedal crank 30 to the braking feel simulator device 2 so that an actuation of the brake pedal 3 corresponds to an actuation of the braking feel simulator device 2.
  • the signaling and detection system 6 is positioned at the brake pedal 3.
  • the first body 4 corresponds to the pedal pad 29 of the brake pedal 3.
  • the second body 5 corresponds to the pedal crank 30 of the brake pedal 3 (fig. 11).
  • the pedal pad 29 comprises a pressure wall 31 and an opposite fixing wall 32.
  • the pressure wall 31 faces the driver and is configured to be pressed by a driver's foot so as to actuate the brake pedal 3.
  • the fixing wall 32 faces towards the pedal crank 30 and is fixed to the pedal crank 30.
  • the pedal crank 30 comprises a support wall 34 facing the pedal pad 29 and fixed to the pedal pad 29.
  • the haptic feedback actuator 7 is housed inside the housing 27 and is positioned in contact with the pressure wall 31 .
  • such a configuration facilitates the transmission and perception of haptic feedback by the driver because the haptic feedback is transmitted directly to the pressure wall 31 on which the driver rests his/her foot to control braking.
  • the pressure wall 31 and the fixing wall 32 are connected to each other by means of a plurality of screws 33.
  • the screws 33 are inserted through the pressure wall 31 and are screwed to the fixing wall 32.
  • the fixing wall 32 is fixed to the pedal crank 30, and in particular to the support wall 34, by means of at least one connection screw 13, preferably a plurality of connection screws 13, as described above.
  • the fixing wall 32 of the pedal pad 29 and the support wall 34 of the pedal crank 30 face each other and are spaced apart so as to define the clearance 10, as described above.
  • the damping means 1 1 e.g., the ring-shaped elements made of elastomeric material 19 described above, are positioned interposed between the support wall 34 of the pedal crank 30 and the screw head 18 of the connection screws 13.
  • the transmission element 9 is positioned to be fixed to the fixing wall 32 of the pedal pad 29, protruding from the fixing wall 32 and facing the support wall 34 of the pedal crank 30.
  • the fixing wall 32 comprises a threaded seat 22 in which the transmission element 9 is connected, as described above.
  • the sensor 8 is housed in the pedal crank 30.
  • the support wall 34 of the pedal crank 30 comprises the sensor seat 25 in which the sensor 8 is positioned.
  • the haptic feedback actuator 7 is configured to transmit haptic feedback, e.g., a vibration, to the pressure wall 31 of the pedal pad 29.
  • the haptic feedback is thus perceivable by the driver acting on the brake pedal 3, and in particular on the pedal pad 29.
  • the haptic feedback is transferred from the pressure wall to the fixing wall 32 to which the transmission element 9 is fixed.
  • the transmission element 9 thus transfers the haptic feedback to the sensor 8, and the sensor 8 is thus capable of detecting the haptic feedback and enabling its subsequent processing by an electronic processing unit connected to the sensor 8.
  • the haptic feedback transmitted to fixing wall 32 is further transmitted to the connection screws 13 screwed to the fixing wall 32.
  • the haptic feedback is damped by the damping means 11 at the connection screws 13.
  • the haptic feedback is thus prevented from being transmitted to the pedal crank 30 by means of the connection screws 13, so as to ensure the correct reading of the haptic feedback by the sensor 8.
  • the damping means 1 1 positioned interposed between the pedal pad 29 and the pedal crank 30 allow the transmission of the actuation force, applied by the driver on the pedal pad 29, from the pedal pad 29 to the pedal crank 30 through the transmission element 9. A correct reading by the sensor 8 of the actuating force applied by the driver on the pedal pad 29 is thus ensured.
  • such a configuration damps the transfer of vehicle vibrations, e.g., due to road surface, to the signaling and detection system 6.
  • vehicle vibrations e.g., due to road surface
  • the vehicle, and thus the pedal crank 30, will be subject to vibration in the presence of potholes or ditches.
  • These vehicle vibrations are not transmitted to the pedal pad 29, or are transmitted to the pedal pad 29 greatly damped, by the damping means 1 1.
  • the vehicle vibrations do not interfere in the reading of the sensor 8 of the vibrations of the haptic feedback actuator 7.
  • the positioning of the haptic feedback actuator 7 and sensor 8 inside the brake pedal 3 as described above guarantees a high transmission of haptic feedback to the driver while providing a direct detection of the actuation force applied by the driver onto the brake pedal 3, in addition to a reduction in the total size of the signaling and detection system 6.
  • the braking system 1 thus configured prevents the pedal pad 29 from colliding with the pedal crank 30 when the driver applies the actuation force of the braking system 1 onto the pedal pad 29.
  • the signaling and detection system 6 is positioned at the hinge 35 (fig. 12).
  • the hinge 35 comprises a first hinge body 37 and a second hinge body 38 hinged to each other so as to be mutually rotatable about a hinge axis 39.
  • the first hinge body 37 is connected to the pedal crank 30, while the second hinge body 38 is connected to the vehicle chassis.
  • the first body 4 corresponds to the first hinge body 37.
  • the second body 5 corresponds to the second hinge body 38.
  • such a configuration of the braking system 1 allows transmitting the haptic feedback, generated by the haptic feedback actuator 7, to the driver by means of the pedal crank 30 connected to the first hinge body 37.
  • the haptic feedback 7 is transmitted to the sensor 8 by means of the transmission element 9 in the manner described above and not repeated here to avoid redundancy.
  • the transmission of haptic feedback from the first hinge body 37 to the second hinge body 38 through the connecting means 12, e.g., the connection screws 13, by means of the damping means 11 interposed between the first hinge body 37 and the second hinge body 38, in the manner described above and not repeated here to avoid redundancies, is prevented or otherwise greatly damped.
  • such a configuration of braking system 1 allows detecting the actuation force applied by the driver on the brake pedal 3 by means of the relative movement, and subsequent transfer of the actuation force of the brake pedal 3, between the first hinge body 37 and the second hinge body 38.
  • the signaling and detection system 6 is positioned at the braking feel simulator device 2 (fig. 13).
  • the braking feel simulator device 2 comprises at least one elastic element 40.
  • the at least one elastic element 40 is configured to apply a reaction force on the brake pedal in response to an actuation of the braking feel simulation device 2.
  • the at least one elastic element 40 is configured to apply a reaction force on the brake pedal 3 in response to an actuation of the brake pedal 3 by a driver.
  • the braking feel simulator device 2 comprises a thrust shaft 41 .
  • the thrust shaft 41 configured to be biased against the at least one elastic element 40, in response to an actuation of the brake pedal 3.
  • the at least one elastic element 40 thus applies a counteracting force upon actuation of the brake pedal 3.
  • the first body 4 corresponds to the thrust shaft 41 .
  • the second body 5 corresponds to the at least one elastic element 40.
  • the braking system 4 corresponds to the at least one elastic element 40.
  • the second body 5 corresponds to the thrust shaft 41 .
  • such a configuration 1 of the braking system allows transmitting the haptic feedback, generated by the haptic feedback actuator 7, to the driver by means of the brake pedal 3, and preferably the pedal crank 30, connected to the thrust shaft 41 .
  • the haptic feedback 7 is transmitted to the sensor 8 by means of the transmission element 9 in the manner described above and not repeated here to avoid redundancy.
  • the transmission of the haptic feedback from the thrust shaft 41 to the at least one elastic element 40 by means of the connecting means 12, e.g., connection screws 13, through the damping means 11 interposed between the thrust shaft 41 and the at least one elastic element 40, in the manner described above and not repeated here to avoid redundancy, is prevented or otherwise greatly damped.
  • such a configuration of braking system 1 allows detecting the actuation force applied by the driver onto the brake pedal 3 by means of the relative movement, and subsequent transfer of the actuation force of brake pedal 3, between the thrust shaft 41 and the at least one elastic element 40.
  • the signaling and detection system 6 is positioned at the mechanical connection device 36 (fig. 14).
  • the mechanical linkage device 36 connects a thrust shaft 41 of the braking feel simulator device 2 to the pedal crank 30 of the brake pedal 3.
  • the first body 4 corresponds to the brake pedal 3, in particular the pedal crank 30.
  • the second body 5 corresponds to the braking feel simulator device 2, in particular to the thrust shaft 41 .
  • the second body 5 corresponds to the brake pedal 3, in particular to the pedal crank 30.
  • the first body 4 corresponds to the braking feel simulator device 2, in particular to the thrust shaft 41 .
  • such a configuration of the braking system 1 allows transmitting the haptic feedback, generated by haptic feedback actuator 7, to the driver by means of the pedal pad 29 connected to the pedal crank 30.
  • the haptic feedback 7 is transmitted to the sensor 8 by means of the transmission element 9 in the manner described above and not repeated here to avoid redundancy.
  • the transmission of haptic feedback from the brake pedal 3, in particular the pedal crank 30, to the braking feel simulator device 2, in particular the thrust shaft 41 , by means of the connecting means 12, e.g., the connection screws 13, is prevented or otherwise significantly damped, by means of the damping means 1 1 interposed between the brake pedal 3, in particular the pedal crank 30, and the braking feel simulator device 2, in particular the thrust shaft 41 , in the manner described above and not repeated herein to avoid redundancy.
  • such a configuration of the braking system 1 allows detecting the actuation force applied by the driver onto brake pedal 3 by means of the relative movement, and subsequent transfer of the actuation force of the brake pedal 3, between the brake pedal 3, in particular the pedal crank 30 and the braking feel simulator device 2, in particular the thrust shaft 41 .
  • the signaling and detection system 6 is positioned at a motorcycle brake lever 42 (fig. 15) or a motorcycle brake pedal 43 (fig. 16).
  • the braking system 1 comprises at least a second brake caliper.
  • the braking system 1 comprises an electronic processing unit electrically connected to the at least one brake caliper, the brake pedal 3, the braking feel simulator device 2, and the signaling and detection system 6.
  • the electronic processing unit is configured to actuate the at least one brake caliper upon the detection of an actuation and/or movement of the brake pedal 3 and/or an actuation and/or a movement of the braking feel simulator device 2.
  • the electronic processing unit is further configured to command the haptic feedback actuator 7 to generate haptic feedback and is configured to acquire and process the force and haptic feedback readings detected by the sensor 8.
  • Ring-shaped element made of elastomeric material

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Elements And Transmission Devices (AREA)

Abstract

Système de freinage (1), comprenant un premier dispositif de simulateur de sensation de freinage (2) et une pédale de frein (3) fonctionnellement reliée au dispositif de simulateur de sensation de freinage (2), le système de freinage (1) comprenant au moins un premier corps (4) et un second corps (5) reliés mécaniquement l'un à l'autre de telle sorte que la force d'actionnement appliquée par le conducteur à la pédale de frein (3) est transférée entre le premier corps (4) et le second corps (5), le système de freinage (1) comprenant un système de signalisation et de détection (6) comprenant un actionneur de rétroaction haptique (7), un capteur (8) et un élément de transmission (9) configuré pour transmettre la rétroaction haptique générée par l'actionneur de rétroaction haptique (7) au capteur (8) et/ou pour transférer la force d'actionnement appliquée par le conducteur à la pédale de frein (3) entre le premier corps (4) et le second corps (5), l'actionneur de rétroaction haptique (7) et l'élément de transmission (9) étant positionnés au niveau du premier corps (4), tandis que le capteur (8) est positionné au niveau du second corps (5), l'élément de transmission (9) conduisant du premier corps (4) et étant positionné pour venir en butée contre le capteur (8) de façon à définir un jeu (10) entre le premier corps (4) et le second corps (5), le système de freinage (1) comprenant des moyens de liaison (12) pour relier le premier corps (4) au second corps (5), le système de freinage (1) comprenant des moyens d'amortissement (11), positionnés interposés entre le premier corps (4) et le second corps (5) et configurés pour amortir des mouvements ou des vibrations transmissibles, à travers les moyens de liaison (12), entre le premier corps (4) et le second corps (5).
PCT/IB2024/055659 2023-06-12 2024-06-10 Système de freinage Pending WO2024256950A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102023000011952A IT202300011952A1 (it) 2023-06-12 2023-06-12 Sistema frenante
IT102023000011952 2023-06-12

Publications (1)

Publication Number Publication Date
WO2024256950A1 true WO2024256950A1 (fr) 2024-12-19

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IT (1) IT202300011952A1 (fr)
WO (1) WO2024256950A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202013103011U1 (de) * 2013-07-08 2013-07-15 Ford Global Technologies, Llc Fahrzeugpedal mit haptischer Rückmeldung
WO2016184458A1 (fr) * 2015-05-20 2016-11-24 Continental Automotive Gmbh Pédale comportant un actionneur pour produire un signal pouvant être perçu de façon haptique
US20180001875A1 (en) * 2016-06-30 2018-01-04 GM Global Technology Operations LLC Brake-by-wire system for a vehicle with an adjustable brake pedal emulator assembly
US20200001711A1 (en) * 2017-03-01 2020-01-02 HELLA GmbH & Co. KGaA Pedal emulator for a motor vehicle
US20200148182A1 (en) * 2017-05-31 2020-05-14 Freni Brembo S.P.A. Braking system for brake by wire vehicles provided with hydraulic feedback simulator, and actuation method of a braking system for vehicles

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202013103011U1 (de) * 2013-07-08 2013-07-15 Ford Global Technologies, Llc Fahrzeugpedal mit haptischer Rückmeldung
WO2016184458A1 (fr) * 2015-05-20 2016-11-24 Continental Automotive Gmbh Pédale comportant un actionneur pour produire un signal pouvant être perçu de façon haptique
US20180001875A1 (en) * 2016-06-30 2018-01-04 GM Global Technology Operations LLC Brake-by-wire system for a vehicle with an adjustable brake pedal emulator assembly
US20200001711A1 (en) * 2017-03-01 2020-01-02 HELLA GmbH & Co. KGaA Pedal emulator for a motor vehicle
US20200148182A1 (en) * 2017-05-31 2020-05-14 Freni Brembo S.P.A. Braking system for brake by wire vehicles provided with hydraulic feedback simulator, and actuation method of a braking system for vehicles

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