WO2015146963A1 - Système de freins électriques, véhicule comportant un système de freins électriques, et procédé pour commander un système de freins électriques - Google Patents

Système de freins électriques, véhicule comportant un système de freins électriques, et procédé pour commander un système de freins électriques Download PDF

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Publication number
WO2015146963A1
WO2015146963A1 PCT/JP2015/058865 JP2015058865W WO2015146963A1 WO 2015146963 A1 WO2015146963 A1 WO 2015146963A1 JP 2015058865 W JP2015058865 W JP 2015058865W WO 2015146963 A1 WO2015146963 A1 WO 2015146963A1
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Prior art keywords
brake
electric
hydraulic
electric brake
vehicle
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Application number
PCT/JP2015/058865
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English (en)
Japanese (ja)
Inventor
安井　誠
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Ntn株式会社
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Publication of WO2015146963A1 publication Critical patent/WO2015146963A1/fr

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    • 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
    • F16D65/00—Parts or details
    • F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
    • F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
    • F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
    • 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
    • B60T13/58—Combined or convertible systems
    • B60T13/588—Combined or convertible systems both fluid and mechanical assistance or drive
    • 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
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/26—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels
    • B60T8/266—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels using valves or actuators with external control means
    • B60T8/267—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels using valves or actuators with external control means for hybrid systems with different kind of brakes on different axles
    • 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
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/321—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration deceleration
    • B60T8/3255—Systems in which the braking action is dependent on brake pedal data
    • 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
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/343—Systems characterised by their lay-out
    • B60T8/344—Hydraulic systems
    • B60T8/348—4 Channel systems
    • 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
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/88—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means
    • B60T8/885—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means using electrical circuitry
    • 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
    • F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
    • F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
    • F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
    • F16D55/228—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a separate actuating member for each side
    • 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
    • B60T2270/00—Further aspects of brake control systems not otherwise provided for
    • B60T2270/40—Failsafe aspects of brake control systems
    • B60T2270/402—Back-up
    • 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
    • F16D2121/00—Type of actuator operation force
    • F16D2121/02—Fluid pressure
    • F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid 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
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
    • F16D2125/34—Mechanical mechanisms converting rotation to linear movement or vice versa acting in the direction of the axis of rotation
    • F16D2125/40—Screw-and-nut
    • 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
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/44—Mechanical mechanisms transmitting rotation
    • F16D2125/46—Rotating members in mutual engagement
    • 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
    • F16D2125/00—Components of actuators
    • F16D2125/18—Mechanical mechanisms
    • F16D2125/44—Mechanical mechanisms transmitting rotation
    • F16D2125/46—Rotating members in mutual engagement
    • F16D2125/48—Rotating members in mutual engagement with parallel stationary axes, e.g. spur gears

Definitions

  • the present invention employs an electric brake as a service brake, and when a failure occurs in the electric brake, the electric brake system for braking the vehicle by operating the hydraulic brake provided on the wheel, and the electric brake
  • the present invention relates to a vehicle equipped with a brake system and a method for controlling an electric brake system.
  • an electric motor is driven to rotate according to an operation amount (depression amount) of a brake pedal, and the rotational force of the electric motor is used.
  • electric brakes that generate braking force have been developed.
  • the electric brake is provided on each wheel of the vehicle, and the electric brake caliper is equipped with an electric actuator including various sensors including an electric motor, a reduction gear, a linear motion mechanism, and a pressure sensor.
  • the vehicular brake control device can obtain a desired braking force when the vehicle controller detects that a pressing force sensor that detects the braking force of a brake of one wheel has failed. In addition, the braking force is applied to the other wheels in which the pressing force sensor has not failed to brake the vehicle in a stable posture.
  • the electric brake device has an effect of improving the braking force generation timing shift in each wheel and maintaining a good four-wheel braking balance even when thermal expansion or wear occurs in the brake friction material. .
  • the ignition key is turned on and the clearance between the pad and the disc is properly grasped immediately after the system is started and the brake braking motor is appropriately driven. Has an effect.
  • a drum brake may be provided separately from the disc hydraulic brake, and this drum brake may function as a parking brake.
  • a floating caliper is employed, and a caliper driving member such as a cylinder is provided from one side of the floating caliper.
  • the opposed piston caliper employed in the brake may be applied to the electric brake, and the disc rotor may be sandwiched between the inner and outer sides of the brake pad.
  • an object of the present invention is to reliably brake the vehicle even when the electric brake fails.
  • an electric brake provided on at least two left and right wheels of a vehicle that exerts a braking force by a driver's brake operation, and when the electric brake fails,
  • the hydraulic brake that exerts braking force instead of the brake, and the hydraulic brake are incorporated in the wheel provided with the electric brake together with the electric brake, and the hydraulic brake can be operated in the event of failure
  • an electric brake system having a control device for achieving a stable state.
  • the hydraulic brake can be operated when the electric brake fails, and the vehicle can be safely stopped.
  • the hydraulic brake is not operated.
  • the control device grasps the failure state, Make the hydraulic brake ready for the first time. That is, there is no competition between the electric brake and the hydraulic brake, and a stable braking force can always be obtained by the driver's brake operation.
  • the hydraulic brake may be a drum brake. Since this drum brake is built in the wheel provided with the electric brake together with the electric brake, the entire system can be made compact.
  • the hydraulic brake is a disc brake that brakes the disc rotor of the electric brake, and a hydraulic piston that drives the caliper is incorporated in a claw portion outside the caliper of the electric brake. It can also be.
  • the hydraulic piston is built in the outer claw portion of the caliper, and the brake disc of the electric brake and the brake disc of the hydraulic brake are shared, so that it is not necessary to provide a separate disc rotor for the hydraulic brake. Therefore, the entire system can be further downsized.
  • a master cylinder that operates in accordance with an operation amount of a brake pedal, a hydraulic pipe that connects the master cylinder and the hydraulic brake, and a hydraulic pipe that is provided in the middle of the hydraulic pipe
  • the control device further includes a hydraulic valve that is closed during operation, and the control device has a function of switching the hydraulic valve from a closed state to an open state when the failure occurs.
  • the vehicle is a four-wheeled vehicle provided with two front and rear wheels, and a parking brake function is provided in at least one of the front and rear two-wheel electric brakes.
  • a warning device that displays a warning to the driver or emits a warning sound when a failure occurs. In this way, since the driver can quickly notice the abnormality of the vehicle and take a countermeasure, it is possible to prevent a serious trouble from occurring.
  • a step of detecting a brake operation amount by a driver, and corresponding to the brake operation amount In the step of determining whether or not the electric brake is operating and the step of determining, if it is determined that the electric brake has failed, the operation of all the electric brakes is stopped. And a step of opening a hydraulic valve provided in the middle of a brake hydraulic pipe connected to the hydraulic brake and operating the hydraulic brake in response to the amount of brake operation, and the step of determining When it is determined that the electric brake is operating normally, the electric brake is It is possible to configure the control method of the electric brake system comprising: the step of directly operating the over key, a.
  • each step is configured to operate the hydraulic brake only when the electric brake fails, so there is no competition between the electric brake and the hydraulic brake, and it is always stable by the driver's brake operation. Braking force can be obtained.
  • the braking force is exerted by the driver's braking operation, and the braking force is exerted instead of the electric brake when the electric brake provided on all the wheels of the vehicle fails.
  • An electric brake system including a hydraulic brake and a control device that enables the hydraulic brake to operate when the failure occurs is configured.
  • FIG. 6 is a longitudinal sectional view taken along line VV showing the main part of the electric brake shown in FIG.
  • FIG. 4 is a longitudinal sectional view taken along line VI-VI showing the main part of the electric brake shown in FIG.
  • Side view showing an example of a drum-type hydraulic brake adopted in the electric brake system according to the present invention
  • This vehicle 1 is a four-wheeled vehicle provided with two front and rear wheels, all of which are provided with disc-type electric brakes 3 and two front wheels with hydraulic brakes 4.
  • the brake pedal 5 is provided with a stroke sensor 6 that detects a brake operation amount (depression amount).
  • the brake operation amount detected by the stroke sensor 6 is transmitted to the vehicle control unit 7 (VCU).
  • VCU vehicle control unit 7
  • a control signal generated from the VCU 7 is sent to the electric brake control device 8, and each electric brake 3 provided on each wheel 2 is supplied from the electric brake control device 8 to each electric brake 3 with a braking force corresponding to the brake operation amount.
  • a command is issued to brake the wheel 2.
  • the brake pedal 5 is also connected to a braking hydraulic pipe 9.
  • This braking hydraulic pipe 9 is branched halfway and connected to a hydraulic brake 4 provided on the left and right front wheels.
  • a master cylinder 10 and a hydraulic valve 11 that operate in accordance with the operation amount of the brake pedal 5 are provided in the middle of the braking hydraulic pipe 9.
  • the hydraulic valve 11 is normally closed (in a state where the electric brake 3 has not failed). In this closed state, even if the brake pedal 5 is operated, the braking force is not transmitted to the hydraulic brake 4. In this case, a braking force is applied to each wheel 2 by the electric brake 3.
  • the hydraulic valve 11 is provided with a hydraulic valve control device 12, and this hydraulic valve control device 12 is connected to the VCU 7.
  • a hydraulic valve control device 12 When the VCU 7 detects that at least one of the electric brakes 3 is not operating normally even though the brake pedal 5 is operated, an operation signal is issued from the VCU 7 to the hydraulic valve control device 12, and this operation is performed. Based on the signal, the hydraulic valve control device 12 opens the hydraulic valve 11. By opening the hydraulic valve 11 in this manner, the braking force can be applied to the hydraulic brake 4 by operating the brake pedal 5 as described above.
  • FIG. 2 shows a general control system of the electric brake 3.
  • the operation amount of the brake pedal 5 is detected by the pedal stroke sensor 6, and the detected amount is transmitted to the controller 14.
  • the detected amounts from the wheel speed sensor 15 that detects the speed of each wheel 2 and the front-rear G sensor 16 that detects acceleration in the front-rear direction of the vehicle 1 are also transmitted to the controller 14.
  • the amount of detection from each of the sensors 15 and 16 is aggregated in the CPU 17 of the controller 14 and a control algorithm stored in advance in the memory 18 is applied to calculate the braking force of the electric brake 3 provided on the wheel 2. To do. Based on the calculated braking force, the braking force of the electric brake 3 is exhibited.
  • electric power supplied from the battery 19 to the driver 20 is used.
  • the controller 14, the CPU 17, and the memory 18 are provided in the vehicle control unit 7 (VCU), and the driver 20 is provided in the electric brake control device 8.
  • the electric brake 3 operates upon receiving power supply from the battery 19, but for some reason, the charge amount of the battery 19 decreases, the sensors 15 and 16 fail, the electric wiring is disconnected, etc. When an electrical failure occurs, the braking force of the electric brake 3 may not be exhibited. In this case, the hydraulic brake 4 provided along with the electric brake 3 exerts a braking force instead of the electric brake 3 to brake the vehicle 1.
  • Fig. 3 shows the control flow of this electric brake system.
  • the electric brake 3 is a service brake
  • the hydraulic brake 4 is an emergency brake when the electric brake 3 fails.
  • the hydraulic valve 11 is closed (S1) so that the hydraulic brake 4 is not activated. In this way, when the brake pedal 5 is operated, it is possible to prevent the electric brake 3 and the hydraulic brake 4 from competing and operating to brake the vehicle 1 in an unstable manner.
  • the driver can be alerted by turning on a warning display (warning light, alarm buzzer, etc.) provided in the vehicle 1 (S8).
  • a warning display warning light, alarm buzzer, etc.
  • FIG. 4 shows a first embodiment of the electric brake system according to the present invention.
  • the electric brake 3 used in this electric brake system is a drum-in-disk type having a parking brake function as well as a service brake function.
  • a caliper 22 is provided on the outer periphery of the disc rotor 21 that rotates integrally with a wheel (not shown), and a claw portion 23 that axially faces the outer peripheral portion of the outer side surface of the disc rotor 21 is provided at one end of the caliper 22.
  • the outer brake pad 24 is supported by the claw portion 23.
  • an inner brake pad 25 is disposed on the outer peripheral portion of the inner side surface of the disk rotor 21, and the inner brake pad 25 is connected to the disk rotor 21 by an electric linear actuator 26 provided at the other end of the caliper 22. It is comprised so that it can move toward.
  • the electric linear actuator 26 has a cylindrical housing 27 integrated with the other end of the caliper 22, and an outer ring member 28 is incorporated in the housing 27 so as to be slidable in the housing 27. Yes.
  • a shaft support member 29 is incorporated in the housing 27 on the inner side of the inner side end portion of the outer ring member 28.
  • a drive shaft 32 is supported by the boss 30 formed on the shaft support member 29 via two rolling bearings 31 so as to be rotatable around the shaft.
  • An inner side end portion of the drive shaft 32 faces a gear case 33 attached to the inner side end portion of the housing 27.
  • an electric motor 34 is provided as shown in FIG.
  • the rotation of the rotor shaft 35 of the electric motor 34 is transmitted to the drive shaft 32 after being decelerated by a gear reduction mechanism 36 incorporated in the gear case 33.
  • the gear reduction mechanism 36 sequentially reduces the rotation of the input gear 37 attached to the rotor shaft 35 of the electric motor 34 by the primary reduction gear train G1 and the secondary reduction gear train G2. Then, the drive shaft 32 is rotated by being transmitted to the output gear 38 attached to the shaft end portion of the drive shaft 32.
  • a lock mechanism 39 for holding the gear reduction mechanism 36 in a locked state in which power transmission is impossible during parking.
  • the lock mechanism 39 includes a plurality of locking recesses 41 formed on the side surface of the intermediate gear 40 constituting the gear reduction mechanism 36, a plunger 42 made of a magnetic material that is movably provided in the axial direction, and the plunger 42 Has a solenoid coil 43 that advances and retracts in the axial direction thereof, and a lock pin 44 provided at the tip of the plunger 42.
  • a rotation / linear motion conversion mechanism 45 that converts the rotation of the drive shaft 32 into a linear motion in the axial direction of the outer ring member 28 is provided between the drive shaft 32 and the outer ring member 28.
  • the rotation / linear motion conversion mechanism 45 has a planetary roller 46 incorporated between the outer ring member 28 and the drive shaft 32.
  • a spiral protrusion 47 is formed on the inner periphery of the outer ring member 28 facing the planetary roller 46, and a spiral groove 48 that meshes with the spiral protrusion 47 is formed on the outer periphery of the planetary roller 46.
  • the solenoid coil 43 shown in FIG. 5 When parking, the solenoid coil 43 shown in FIG. 5 is energized while the braking force is exerted by the inner brake pad 25 and the outer brake pad 24. Then, due to the magnetic force generated by the solenoid coil 43, the plunger 42 moves to the intermediate gear 40 side, and the lock pin 44 is engaged with the locking recess 41. By this engagement, the intermediate gear 40 is locked, and the function as a parking brake is exhibited.
  • FIG. 1 An example of the hydraulic brake 4 employed in the electric brake system is shown in FIG.
  • the hydraulic brake 4 expands the leading shoe 50 and the trailing shoe 51 held by the anchor 49 by the operation of the wheel cylinder 52 and exerts a braking force by pressing the lining 54 against the inner surface of the drum 53.
  • Leading trailing type The hydraulic brake 4 can be compactly mounted in the drum 53 and has a high braking force. Therefore, even when the electric brake 3 fails, the vehicle 1 is reliably braked to ensure high safety. be able to.
  • the leading trailing hydraulic brake 4 is shown, but a two-leading shoe type or duo servo type which is widely used can also be adopted.
  • the leading trailing hydraulic brake 4 having a compact structure it is easy to fit the inner diameter side of the disk rotor 21.
  • FIG. 8 shows a second embodiment of the electric brake system according to the present invention. Since the configuration of the electric brake 3 used in this electric brake system is the same as the configuration according to the first embodiment, the description thereof is omitted.
  • the caliper 22 of the electric brake 3 is provided with a piston-type hydraulic brake 4. That is, the hydraulic piston 60 is built in the claw portion 23 outside the caliper 22. The hydraulic piston 60 is driven by supplying hydraulic oil to a hydraulic chamber 62 from a pressure oil supply port 61 formed in the claw portion 23.
  • the outer brake pad 24 provided on the claw 23 side comes into contact with the disk rotor 21 and presses the disk rotor 21 in the axial direction. Due to the reaction force of the pressing force, the caliper 22 moves so that the inner brake pad 25 connected and integrated with the outer ring member 28 approaches the disk rotor 21, and the inner brake pad 25 comes into contact with the disk rotor 21.
  • the disc rotor 21 is firmly sandwiched between the outer side brake pad 24 and the inner side brake pad 25 to exert a braking force.
  • each of the above embodiments is an example, and even if the electric brake 3 fails, the wheel on which the electric brake 3 is mounted as long as the problem of the present invention of reliably braking the vehicle 1 can be solved. 2 position (two front wheels, two rear wheels, or all four wheels), the position of the wheel 2 on which the hydraulic brake 4 built in together with the electric brake 3 is mounted (two front wheels, two rear wheels, or all four wheels) ) Or the order of the steps of the failure determination flow may be appropriately changed.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Regulating Braking Force (AREA)
  • Braking Arrangements (AREA)

Abstract

　L'invention porte sur un système de freins électriques, lequel système est constitué par le fait qu'il a : des freins électriques (3) pour exercer une force de freinage par l'intermédiaire d'un actionnement de frein d'un conducteur, les freins électriques étant disposés sur au moins deux roues gauche et droite d'un véhicule (1) ; des freins hydrauliques (4) pour exercer une force de freinage à la place des freins électriques (3) quand les freins électriques (3) sont défaillants, les freins hydrauliques (4) étant renfermés avec les freins électriques (3) à l'intérieur de roues de véhicule (2) comportant les freins électriques (3) ; et un dispositif de commande (12) pour mettre les freins hydrauliques (4) dans un état actif quand la défaillance se produit. Quand les freins électriques (3) sont défaillants, le véhicule (1) peut être freiné de façon sûre par l'activation des freins hydrauliques (4).
PCT/JP2015/058865 2014-03-25 2015-03-24 Système de freins électriques, véhicule comportant un système de freins électriques, et procédé pour commander un système de freins électriques WO2015146963A1 (fr)

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JP2014118409A JP2015193357A (ja) 2014-03-25 2014-06-09 電動式ブレーキシステム、電動式ブレーキシステムを搭載した車両、及び電動式ブレーキシステムの制御方法

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WO2020160718A1 (fr) * 2019-02-07 2020-08-13 Schaeffler Technologies AG & Co. KG Procédé pour l'exécution d'une fonction de freinage d'urgence d'un véhicule
US11149829B2 (en) * 2016-03-30 2021-10-19 Ntn Corporation Electric actuator
CN114132295A (zh) * 2021-11-17 2022-03-04 广西宁达汽车科技有限公司 电控执行***及车辆

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JP6679381B2 (ja) * 2016-03-30 2020-04-15 Ntn株式会社 電動アクチュエータ
KR20220104469A (ko) 2021-01-18 2022-07-26 주식회사 만도 전자식 주차 브레이크 시스템 및 그 제어 방법
KR20230032616A (ko) 2021-08-31 2023-03-07 에이치엘만도 주식회사 전자식 주차 브레이크 시스템 및 그 제어 방법

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JP2000280969A (ja) * 1999-03-30 2000-10-10 Honda Motor Co Ltd 自動二輪車における制動装置
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US11149829B2 (en) * 2016-03-30 2021-10-19 Ntn Corporation Electric actuator
WO2020160718A1 (fr) * 2019-02-07 2020-08-13 Schaeffler Technologies AG & Co. KG Procédé pour l'exécution d'une fonction de freinage d'urgence d'un véhicule
CN114132295A (zh) * 2021-11-17 2022-03-04 广西宁达汽车科技有限公司 电控执行***及车辆

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