WO2015146963A1 - Electric brake system, vehicle equipped with electric brake system, and method for controlling electric brake system - Google Patents

Electric brake system, vehicle equipped with electric brake system, and method for controlling electric brake system 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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WIPO (PCT)
Prior art keywords
brake
electric
hydraulic
electric brake
vehicle
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Application number
PCT/JP2015/058865
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French (fr)
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/en

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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.

Abstract

　An electric brake system is configured by having: electric brakes (3) for exerting braking force through a brake operation of a driver, the electric brakes being provided to at least two left and right wheels of a vehicle (1); hydraulic brakes (4) for exerting braking force in place of the electric brakes (3) when the electric brakes (3) fail, the hydraulic brakes (4) being housed along with the electric brakes (3) within vehicle wheels (2) provided with the electric brakes (3); and a control device (12) for putting the hydraulic brakes (4) into an active state when the failure occurs. When the electric brakes (3) fail, the vehicle (1) can be safely braked by activating the hydraulic brakes (4).

Description

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Electric brake system, vehicle equipped with electric brake system, and control method of electric brake system
　この発明は、サービスブレーキとして電動式ブレーキを採用し、この電動式ブレーキに失陥が生じた場合に、車輪に設けた油圧式ブレーキを作動させて、車両を制動する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に関する。 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.
　自動車等の車両に用いられるブレーキとして、例えば下記特許文献１～３に示すように、ブレーキペダルの操作量（踏み込み量）に応じて電動モータを回転駆動し、この電動モータの回転力を利用して制動力を発生させる電動式ブレーキの開発が近年進められている。この電動式ブレーキは、車両の各車輪に設けられ、電動ブレーキキャリパには、電動モータ、減速機、直動機構、押圧センサを始めとする各種センサ等から構成される電動アクチュエータが装着される。 As a brake used in a vehicle such as an automobile, for example, as shown in Patent Documents 1 to 3 below, 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. In recent years, 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.
　特許文献１に係る車両用ブレーキ制御装置は、車両のコントローラが、一つの車輪のブレーキの制動力を検知する押圧力センサが失陥したことを検出した場合に、所望の制動力が得られるように、押圧力センサが失陥していない他の車輪に対し制動力を作用させて、車両を安定した姿勢で制動する作用を有する。特許文献２に係る電動ブレーキ装置は、ブレーキ摩擦材に熱膨張や摩耗が生じた場合でも、各車輪における制動力発生のタイミングのずれを改善し、四輪の制動バランスを良好に保つ作用を有する。特許文献３に係る電動ブレーキシステムは、イグニッションキーをＯＮ状態として、システムを起動した直後においても、パッドとディスクとの間のクリアランスを適切に把握して、ブレーキ制動用のモータを適切に駆動させる作用を有する。 The vehicular brake control device according to Patent Document 1 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 according to Patent Document 2 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. . In the electric brake system according to Patent Document 3, 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.
　また、例えば下記特許文献４に示すように、ディスク式油圧ブレーキとは別にドラム式ブレーキを併設し、このドラム式ブレーキをパーキングブレーキとして機能させることもある。この特許文献１～４に係る電動式ブレーキにおいてはフローティングキャリパを採用し、このフローティングキャリパの左右一方向からシリンダ等のキャリパ駆動部材を設けた構成としているが、例えば下記特許文献５に係る液圧式ブレーキで採用する対向ピストンキャリパをこの電動式ブレーキに適用し、ディスクロータをその内外両側からブレーキパッドで挟み込む構成とすることもできる。 Also, for example, as shown in Patent Document 4 below, a drum brake may be provided separately from the disc hydraulic brake, and this drum brake may function as a parking brake. In the electric brakes according to Patent Documents 1 to 4, 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.
特開２００４－２１００５４号公報Japanese Patent Laid-Open No. 2004-210054 特開２００３－１７５８１６号公報JP 2003-175816 A 特開２００２－６７９３２号公報JP 2002-67932 A 特開平９－６０６６７号公報Japanese Patent Laid-Open No. 9-60667 特開２０１２－１７７４１４号公報JP 2012-177414 A
　上記特許文献１～４に記載の電動ブレーキは、いずれもバッテリから電力の供給を受けて作動するため、バッテリの充電量の低下、センサの失陥、電気配線の断線等の電気的不具合が生じた場合、電気モータを作動して摩擦パッドをブレーキディスクに押さえ付けることができず、制動力を発揮できなくなることが生じ得る。特許文献４に示すように、ディスク式油圧ブレーキとは別にドラム式のパーキングブレーキを併設したとしても、このパーキングブレーキはサービスブレーキほどの制動力を有しないため、制動距離が大幅に長くなってしまう問題がある。また、電動式ブレーキ（サービスブレーキ）に電動式のパーキングブレーキ機能が併設されている場合は、この電動式ブレーキ以外の補助ブレーキを備えていない場合が多く、サービスブレーキが失陥したときに、それをバックアップするブレーキシステムが何ら備わっていないのが現状である。また、上記特許文献５に記載の対向ピストンキャリパは、左右両側のピストンは一つの駆動源（油圧源）によって駆動されているため、この駆動源が失陥すれば制動力を発揮できなくなるという点については、上記の電動ブレーキの場合と同様である。 All of the electric brakes described in Patent Documents 1 to 4 operate upon receiving power supply from the battery, so that electrical problems such as a decrease in the charge amount of the battery, a failure of the sensor, and disconnection of the electrical wiring occur. In this case, the electric motor cannot be operated to press the friction pad against the brake disc, and the braking force cannot be exhibited. As shown in Patent Document 4, even if a drum-type parking brake is provided in addition to the disc-type hydraulic brake, the parking brake does not have a braking force as much as a service brake, so that the braking distance is significantly increased. There's a problem. In addition, when an electric parking brake function is added to an electric brake (service brake), there are many cases where an auxiliary brake other than the electric brake is not provided. At present, there is no brake system to back up the vehicle. Further, in the opposed piston caliper described in Patent Document 5, since the left and right pistons are driven by one drive source (hydraulic power source), if this drive source fails, the braking force cannot be exerted. Is the same as in the case of the electric brake described above.
　そこで、この発明は、電動式ブレーキが失陥した場合でも、確実に車両を制動することを課題とする。 Therefore, an object of the present invention is to reliably brake the vehicle even when the electric brake fails.
　上記の課題を解決するために、この発明では、運転者のブレーキ操作によって制動力を発揮する、車両の少なくとも左右二輪に設けられた電動式ブレーキと、前記電動式ブレーキの失陥時に、この電動式ブレーキの代わりに制動力を発揮する油圧式ブレーキと、前記油圧式ブレーキは、前記電動式ブレーキを設けた車輪に前記電動式ブレーキと共に内蔵され、前記失陥時に、前記油圧式ブレーキを作動可能な状態とする制御装置と、を有する電動式ブレーキシステムを構成した。 In order to solve the above-described problems, in the present invention, 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 And an electric brake system having a control device for achieving a stable state.
　このように、サービスブレーキとして用いる電動式ブレーキ以外に油圧式ブレーキを併設することにより、この電動式ブレーキの失陥時に油圧式ブレーキを作動させて、車両を安全に停止させることができる。電動式ブレーキが正常に機能しているときは、油圧式ブレーキは作動しないようになっており、この電動式ブレーキに何らかの失陥が生じたときに、その失陥状態を制御装置が把握し、初めて油圧式ブレーキを作動可能な状態とする。すなわち、電動式ブレーキと油圧式ブレーキの動作が競合することはなく、運転者のブレーキ操作によって、常に安定した制動力を得ることができる。 Thus, by providing a hydraulic brake in addition to the electric brake used as a service brake, the hydraulic brake can be operated when the electric brake fails, and the vehicle can be safely stopped. When the electric brake is functioning normally, the hydraulic brake is not operated.When any failure occurs in this electric brake, 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.
　前記構成においては、前記油圧式ブレーキが、ドラムブレーキである構成とすることができる。このドラムブレーキは電動式ブレーキを設けた車輪にこの電動式ブレーキとともに内蔵されているため、システム全体のコンパクト化を図ることができる。 In the above configuration, 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.
　あるいは、前記油圧式ブレーキが、前記電動式ブレーキのディスクロータを制動するディスクブレーキであって、前記電動式ブレーキのキャリパの外側の爪部に、このキャリパを駆動する油圧ピストンが内蔵されている構成とすることもできる。このように、キャリパの外側の爪部に油圧ピストンを内蔵して、電動式ブレーキのブレーキディスクと油圧式ブレーキのブレーキディスクを共用することによって、油圧式ブレーキ用に別途ディスクロータを設ける必要がないため、システム全体の更なるコンパクト化を図ることができる。 Alternatively, 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. In this way, 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.
　前記構成においては、ブレーキペダルの操作量に対応して作動するマスタシリンダと、前記マスタシリンダと前記油圧式ブレーキとをつなぐ油圧配管と、前記油圧配管の途中に設けられ、前記電動式ブレーキの正常作動時に閉状態となっている油圧バルブと、をさらに有し、前記制御装置は、前記失陥時に、前記油圧バルブを閉状態から開状態に切り替える機能を有する構成とするのが好ましい。 In the above configuration, 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, It is preferable that 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.
　このように、油圧配管の途中に油圧バルブを設け、この油圧バルブの開閉を制御装置で制御することによって、電動式ブレーキの失陥時における油圧式ブレーキの作動・不作動を簡便に切り替えることができる。 Thus, by providing a hydraulic valve in the middle of the hydraulic piping and controlling the opening and closing of the hydraulic valve by the control device, it is possible to easily switch between operation and non-operation of the hydraulic brake when the electric brake fails. it can.
　前記各構成においては、前記車両が前後二輪ずつ備えた四輪車であって、前後少なくとも一方の二輪の電動式ブレーキにパーキングブレーキ機能が設けられた構成とするのが好ましい。 In each of the above-described configurations, it is preferable that 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.
　このように、電動式ブレーキにパーキングブレーキの機能を付加することによって、例えば特許文献４で示した構成のように、パーキングブレーキの機能をドラムブレーキに担わせる場合と異なり、このドラムブレーキの設置場所を有効活用することができる。 In this way, by adding the parking brake function to the electric brake, unlike the case where the parking brake function is assigned to the drum brake, for example, as shown in Patent Document 4, the installation location of this drum brake is different. Can be used effectively.
　前記各構成においては、失陥したときに運転者に対する警告を表示し、又は警告音を発する警告装置をさらに備えた構成とするのが好ましい。このようにすれば、運転者が速やかに車両の異常に気付いてその対応をとることができるため、重大なトラブルに至るのを防止することができる。 In each of the above-described configurations, it is preferable to further include 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.
　前記各構成に係る電動式ブレーキシステムを車両に搭載することによって、電動ブレーキの失陥時における車両の安全性を大幅に高めることができる。 By mounting the electric brake system according to each of the above components on the vehicle, the safety of the vehicle when the electric brake fails can be greatly increased.
　また、全輪に電動式ブレーキを備えるとともに、油圧式ブレーキを備えた車両の電動式ブレーキシステムの制御方法において、運転者によるブレーキ操作量を検知するステップと、前記ブレーキ操作量に対応して、前記電動式ブレーキが作動しているか否かを判断するステップと、前記判断するステップにおいて、前記電動式ブレーキが失陥していると判断された場合に、全ての電動式ブレーキの作動を停止するとともに、前記油圧式ブレーキに連結された制動用油圧配管の途中に設けられた油圧バルブを開状態とし、前記ブレーキ操作量に対応して前記油圧式ブレーキを作動するステップと、前記判断するステップにおいて、前記電動式ブレーキが正常に作動していると判断された場合に、前記ブレーキ操作量に対応して、前記電動式ブレーキをそのまま作動させるステップと、を有することを特徴とする電動式ブレーキシステムの制御方法を構成することができる。 In addition, in the method of controlling an electric brake system for a vehicle equipped with an electric brake on all wheels and with a hydraulic brake, 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.
　この制御方法によると、上述したように、電動式ブレーキの失陥時に油圧式ブレーキを作動させて、車両を安全に停止させることができる。しかも、電動式ブレーキの失陥時のみ油圧式ブレーキを作動するように各ステップを構成したので、電動式ブレーキと油圧式ブレーキの動作が競合することはなく、運転者のブレーキ操作によって、常に安定した制動力を得ることができる。 According to this control method, as described above, the vehicle can be safely stopped by operating the hydraulic brake when the electric brake fails. In addition, 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.
　この発明では、運転者のブレーキ操作によって制動力を発揮する、車両の全輪に設けられた電動式ブレーキと、前記電動式ブレーキの失陥時に、この電動式ブレーキの代わりに制動力を発揮する油圧式ブレーキと、前記失陥時に、前記油圧式ブレーキを作動可能な状態とする制御装置と、を有する電動式ブレーキシステムを構成した。このように電動式ブレーキシステムを構成することにより、電動式ブレーキが正常に作動しているときは、この電動式ブレーキで車両を制動する一方で、その失陥時には、その機能を油圧式ブレーキで代替することができる。このため、運転者のブレーキ操作によって、常に安定した制動力を得ることができる。 In this invention, 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. By configuring the electric brake system in this way, when the electric brake is operating normally, the vehicle is braked with this electric brake. Can be substituted. For this reason, a stable braking force can always be obtained by the driver's braking operation.
この発明に係る電動式ブレーキシステムを搭載した車両を示す概略図Schematic showing a vehicle equipped with an electric brake system according to the present invention 電動式ブレーキの一般的な制御系統を示す図Diagram showing a general control system for an electric brake この発明に係る電動式ブレーキシステムの制御方法の流れを示す図The figure which shows the flow of the control method of the electric brake system which concerns on this invention この発明に係る電動式ブレーキシステムの第一実施形態を示す縦断面図A longitudinal sectional view showing a first embodiment of an electric brake system according to the present invention 図６に示した電動式ブレーキの要部を示すＶ－Ｖ線に沿う縦断面図FIG. 6 is a longitudinal sectional view taken along line VV showing the main part of the electric brake shown in FIG. 図４に示した電動式ブレーキの要部を示すＶＩ－ＶＩ線に沿う縦断面図FIG. 4 is a longitudinal sectional view taken along line VI-VI showing the main part of the electric brake shown in FIG. この発明に係る電動式ブレーキシステムに採用したドラム式の油圧式ブレーキの一例を示す側面図Side view showing an example of a drum-type hydraulic brake adopted in the electric brake system according to the present invention この発明に係る電動式ブレーキシステムの第二実施形態を示す縦断面図A longitudinal sectional view showing a second embodiment of the electric brake system according to the present invention
　この発明に係る電動式ブレーキシステムを搭載した車両を図１に示して説明する。この車両１は、前後二輪ずつ備えた四輪車であって、全ての車輪２にディスク式の電動式ブレーキ３が設けられるとともに、前輪二輪に油圧式ブレーキ４が設けられている。ブレーキペダル５には、ブレーキ操作量（踏み込み量）を検知するストロークセンサ６が設けられている。このストロークセンサ６で検知したブレーキ操作量は、車両コントロールユニット７（ＶＣＵ）に伝えられる。そして、このＶＣＵ７から発せられた制御信号が電動ブレーキ制御装置８に送られ、この電動ブレーキ制御装置８から各車輪２に設けられた電動式ブレーキ３に、ブレーキ操作量に対応した制動力で各車輪２を制動するように指令が発せられる。 A vehicle equipped with an electric brake system according to the present invention will be described with reference to FIG. 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). Then, 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.
　このブレーキペダル５は、制動用油圧配管９にも接続されている。この制動用油圧配管９は途中で分岐され、左右の前輪に設けられた油圧式ブレーキ４に接続されている。この制動用油圧配管９の途中には、ブレーキペダル５の操作量に対応して作動するマスタシリンダ１０と、油圧バルブ１１が設けられている。この油圧バルブ１１を開状態としつつブレーキペダル５を操作すると、そのブレーキ操作量に対応して左右の油圧式ブレーキ４に制動力が伝達される。この油圧バルブ１１は、通常は（電動式ブレーキ３が失陥していない状態では）閉状態となっている。この閉状態においては、ブレーキペダル５を操作しても、油圧式ブレーキ４には制動力は伝達されない。この場合、電動式ブレーキ３によって、各車輪２に制動力が付与される。 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. When the brake pedal 5 is operated while the hydraulic valve 11 is opened, a braking force is transmitted to the left and right hydraulic brakes 4 in accordance with the amount of brake operation. 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.
　油圧バルブ１１には、油圧バルブ制御装置１２が設けられており、この油圧バルブ制御装置１２はＶＣＵ７に接続されている。ブレーキペダル５を操作したにも関わらず、少なくとも一つの電動式ブレーキ３が正常に作動していないことをＶＣＵ７が検知した場合、このＶＣＵ７から油圧バルブ制御装置１２に作動信号が発せられ、この作動信号に基づいて、油圧バルブ制御装置１２が油圧バルブ１１を開状態とする。このように油圧バルブ１１を開状態とすることによって、上述したように、ブレーキペダル５の操作によって、油圧式ブレーキ４に制動力を作用させることができる。 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. 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.
　図２に、電動式ブレーキ３の一般的な制御系統を示す。ブレーキペダル５の操作量は、ペダルストロークセンサ６で検知され、その検知量がコントローラ１４に伝えられる。このコントローラ１４には、その他に各車輪２の速度を検知する車輪速センサ１５、及び車両１の前後方向への加速度を検知する前後Ｇセンサ１６からの各検知量も伝えられる。このコントローラ１４のＣＰＵ１７に各センサ１５、１６からの検知量を集約するとともに、メモリ１８に予め記憶されている制御アルゴリズムを適用して、車輪２に設けられた電動式ブレーキ３の制動力を算出する。この算出された制動力に基づいて、電動式ブレーキ３の制動力が発揮される。この電動式ブレーキ３の作動には、バッテリ１９からドライバ２０に供給された電力が用いられる。ここでは、コントローラ１４、ＣＰＵ１７、メモリ１８が車両コントロールユニット７（ＶＣＵ）に設けられており、ドライバ２０が電動ブレーキ制御装置８に設けられている。 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. In addition to this, 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. For the operation of the electric brake 3, electric power supplied from the battery 19 to the driver 20 is used. Here, 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.
　このように、電動式ブレーキ３は、バッテリ１９から電力の供給を受けて作動するが、何らかの理由で、バッテリ１９の充電量の低下、各センサ１５、１６の失陥、電気配線の断線等の電気的不具合が生じた場合、電動式ブレーキ３の制動力が発揮できなくなることが生じる。この場合、電動式ブレーキ３に併設した油圧式ブレーキ４が電動式ブレーキ３の代わりに制動力を発揮して、車両１を制動する。 As described above, 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.
　この電動式ブレーキシステムの制御の流れを図３に示す。この電動式ブレーキシステムにおいては、電動式ブレーキ３がサービスブレーキであって、油圧式ブレーキ４は、あくまでも電動式ブレーキ３が失陥したときの非常用ブレーキである。このため、システム始動時点において、油圧バルブ１１を閉じて（Ｓ１）、油圧式ブレーキ４が作動しない状態としておく。このようにすることで、ブレーキペダル５を操作したときに、電動式ブレーキ３と油圧式ブレーキ４が競合して動作して、車両１の制動が不安定になるのを防止することができる。 Fig. 3 shows the control flow of this electric brake system. In this electric brake system, the electric brake 3 is a service brake, and the hydraulic brake 4 is an emergency brake when the electric brake 3 fails. For this reason, at the time of starting the system, 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.
　次に、ペダルストロークセンサ６によって、ブレーキペダル５が操作されているかどうか（ＯＮ・ＯＦＦ状態）がチェックされ（Ｓ２）、さらにペダルストロークセンサ６又は油圧センサによって、ブレーキペダル５の操作量（踏み込み量）が検知される（Ｓ３）。このブレーキペダル５の操作量に対応して、各輪の電動式ブレーキ３に対して、電動ブレーキ制御装置８から制御信号が発せられる（Ｓ４）。ここで、この制御信号に対して実際に電動式ブレーキ３が制動力を発揮しているかどうかがチェックされる（Ｓ５）。 Next, whether or not the brake pedal 5 is operated (ON / OFF state) is checked by the pedal stroke sensor 6 (S2), and further, the operation amount (depression amount) of the brake pedal 5 by the pedal stroke sensor 6 or the hydraulic sensor. ) Is detected (S3). In response to the operation amount of the brake pedal 5, a control signal is issued from the electric brake control device 8 to the electric brake 3 of each wheel (S4). Here, it is checked whether or not the electric brake 3 actually exhibits a braking force with respect to this control signal (S5).
　このチェックにおいて、電動式ブレーキ３の作動に特に問題がないと判断された場合（Ｓ５のＮＯ側の矢印）、そのまま電動式ブレーキ３による制動を継続する（Ｓ４）。その一方で、電動式ブレーキ３が失陥していると判断された場合（Ｓ５のＹＥＳ側の矢印）、全ての電動式ブレーキ３の作動を停止し（Ｓ６）、さらにＶＣＵ７から油圧バルブ制御装置１２に作動信号を発し、この作動信号に基づいて、油圧バルブ制御装置１２が油圧バルブ１１を開状態とする（Ｓ７）。この油圧バルブ１１を開状態とすることにより、ブレーキペダル５の操作によって油圧式ブレーキ４を作動させて、車両１を制動することができる。このように、全ての電動式ブレーキ３の作動を停止した上で、油圧式ブレーキ４を作動させることにより、各輪に設けた電動式ブレーキ３のうち失陥していないものと油圧式ブレーキ４とが競合して動作して、車両１の制動が不安定になるのを防止することができる。 In this check, if it is determined that there is no particular problem with the operation of the electric brake 3 (the arrow on the NO side of S5), the braking by the electric brake 3 is continued as it is (S4). On the other hand, when it is determined that the electric brake 3 has failed (the arrow on the YES side of S5), the operation of all the electric brakes 3 is stopped (S6), and the hydraulic valve control device is further controlled from the VCU 7. An operation signal is issued to 12, and based on this operation signal, the hydraulic valve control device 12 opens the hydraulic valve 11 (S7). By opening the hydraulic valve 11, the vehicle 1 can be braked by operating the hydraulic brake 4 by operating the brake pedal 5. In this way, by stopping the operation of all the electric brakes 3 and operating the hydraulic brakes 4, the electric brakes 3 that have not been lost among the electric brakes 3 provided on each wheel and the hydraulic brakes 4. Can compete with each other and prevent the braking of the vehicle 1 from becoming unstable.
　さらに、電動式ブレーキ３が失陥した際に、車両１内に設けた警告表示（警告灯、警報ブザー等）をＯＮ状態とすることにより（Ｓ８）、運転者に注意を促すことができる。 Furthermore, when the electric brake 3 fails, the driver can be alerted by turning on a warning display (warning light, alarm buzzer, etc.) provided in the vehicle 1 (S8).
　次に、この発明に係る電動式ブレーキシステムの第一実施形態を図４に示す。この電動式ブレーキシステムに用いられる電動式ブレーキ３は、サービスブレーキの機能とともにパーキングブレーキの機能も有する、ドラムインディスク型のものである。 Next, 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.
　車輪（図示せず）と一体に回転するディスクロータ２１の外周囲にキャリパ２２が設けられ、このキャリパ２２の一端部にディスクロータ２１のアウタ側面の外周部と軸方向で対向する爪部２３が設けられ、この爪部２３でアウタ側ブレーキパッド２４を支持している。また、ディスクロータ２１のインナ側面の外周部にインナ側ブレーキパッド２５を配置し、このインナ側ブレーキパッド２５を、キャリパ２２の他端部に設けられた電動式直動アクチュエータ２６により、ディスクロータ２１に向けて移動できるように構成されている。 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. Further, 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.
　この電動式直動アクチュエータ２６は、キャリパ２２の他端部に一体化された円筒状のハウジング２７を有し、このハウジング２７内に、このハウジング２７内をスライド自在に外輪部材２８が組み込まれている。このハウジング２７内には、外輪部材２８のインナ側端部よりも内側に軸支持部材２９が組み込まれている。そして、この軸支持部材２９に形成されたボス部３０には、２個の転がり軸受３１を介して駆動軸３２が軸周りに回転自在に支持されている。この駆動軸３２のインナ側端部は、ハウジング２７のインナ側端部に取り付けられたギアケース３３内に臨んでいる。 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.
　このギアケース３３内には、図５に示すように、電動モータ３４が設けられている。この電動モータ３４のロータ軸３５の回転は、ギアケース３３内に組み込まれたギア減速機構３６によって減速された上で、駆動軸３２に伝達される。 In the gear case 33, 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.
　このギア減速機構３６は、図５及び図６に示すように、電動モータ３４のロータ軸３５に取り付けられた入力ギア３７の回転を、一次減速ギア列Ｇ１及び二次減速ギア列Ｇ２で順次減速して、駆動軸３２の軸端部に取り付けられた出力ギア３８に伝達して、駆動軸３２を回転させるようになっている。 As shown in FIGS. 5 and 6, 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.
　ギアケース３３内には、駐車時において、このギア減速機構３６を動力伝達が不能なロック状態に保持するロック機構３９が設けられている。このロック機構３９は、ギア減速機構３６を構成する中間ギア４０の側面に形成された複数の係止凹部４１と、軸方向に移動自在に設けられた磁性材料からなるプランジャ４２と、このプランジャ４２をその軸方向に進退させるソレノイドコイル４３と、プランジャ４２の先端に設けられたロックピン４４とを有している。 In the gear case 33, there is provided 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.
　図４に示すように、駆動軸３２と外輪部材２８の間には、駆動軸３２の回転を外輪部材２８の軸方向への直線運動に変換する回転・直動変換機構４５が設けられている。この回転・直動変換機構４５は、外輪部材２８と駆動軸３２との間に組み込まれた遊星ローラ４６を有している。遊星ローラ４６に臨む外輪部材２８の内周には螺旋突条４７が形成されるとともに、遊星ローラ４６の外周には螺旋突条４７と噛み合う螺旋溝４８が形成されている。駆動軸３２を回転すると、遊星ローラ４６が外輪部材２８の内周側で自転しつつ公転し、外輪部材２８を軸方向に移動させるようになっている。 As shown in FIG. 4, 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. When the drive shaft 32 is rotated, the planetary roller 46 revolves while rotating on the inner peripheral side of the outer ring member 28 to move the outer ring member 28 in the axial direction.
　外輪部材２８をディスクロータ２１に接近するように軸方向に移動させると、この外輪部材２８に連結一体化されたインナ側ブレーキパッド２５がディスクロータ２１に当接し、このディスクロータ２１を軸方向に押圧する。この押圧力の反力により、爪部２３に取り付けられたアウタ側ブレーキパッド２４がディスクロータ２１に接近するようにキャリパ２２が移動し、アウタ側ブレーキパッド２４がディスクロータ２１に当接して、インナ側ブレーキパッド２５とアウタ側ブレーキパッド２４でディスクロータ２１が強く挟み込まれて制動力が発揮される。ここで、ディスクロータ２１の内径側に、非常用ブレーキであるドラム式の油圧式ブレーキ４が設けられている。この油圧式ブレーキ４の構造説明は図７にて後述する。 When the outer ring member 28 is moved in the axial direction so as to approach the disk rotor 21, the inner brake pad 25 connected and integrated with the outer ring member 28 contacts the disk rotor 21, and the disk rotor 21 is moved in the axial direction. Press. Due to the reaction force of the pressing force, the caliper 22 moves so that the outer brake pad 24 attached to the claw portion 23 approaches the disk rotor 21, and the outer brake pad 24 comes into contact with the disk rotor 21 to The disc rotor 21 is firmly sandwiched between the side brake pad 25 and the outer side brake pad 24 to exert a braking force. Here, a drum-type hydraulic brake 4 that is an emergency brake is provided on the inner diameter side of the disk rotor 21. The structure of the hydraulic brake 4 will be described later with reference to FIG.
　駐車に際しては、インナ側ブレーキパッド２５とアウタ側ブレーキパッド２４によって制動力が発揮された状態で、図５に示すソレノイドコイル４３に通電する。すると、ソレノイドコイル４３によって生じた磁力により、プランジャ４２が中間ギア４０側に移動し、係止凹部４１にロックピン４４が係合した状態となる。この係合により、中間ギア４０がロックされた状態となり、パーキングブレーキとしての機能が発揮される。 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.
　次に、電動式ブレーキシステムに採用される油圧式ブレーキ４の一例を図７に示す。この油圧式ブレーキ４は、アンカー４９によって保持されたリーディングシュー５０及びトレーリングシュー５１をホイールシリンダー５２の作動によって拡開し、ドラム５３の内面にライニング５４を押し付けることで制動力を発揮させる、所謂リーディングトレーリング式のものである。この油圧式ブレーキ４は、ドラム５３内にコンパクトに搭載できるとともに、高い制動力を有するため、電動式ブレーキ３が失陥した場合においても、車両１を確実に制動して高い安全性を確保することができる。この例では、リーディングトレーリング式の油圧式ブレーキ４を示したが、汎用されているツーリーディングシュー式やデュオサーボ式のものを採用することもできる。なお、コンパクトな構造のリーディングトレーリング式の油圧式ブレーキ４を採用すると、ディスクロータ２１の内径側に収めることが容易となる。 Next, 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. In this example, 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. In addition, when the leading trailing hydraulic brake 4 having a compact structure is employed, it is easy to fit the inner diameter side of the disk rotor 21.
　この発明に係る電動式ブレーキシステムの第二実施形態を図８に示す。この電動式ブレーキシステムに用いられる電動式ブレーキ３の構成は、第一実施形態に係る構成と同じなので、その説明は省略する。この第二実施形態においては、第一実施形態と異なり、電動式ブレーキ３のキャリパ２２にピストン式の油圧式ブレーキ４が設けられている。つまり、キャリパ２２の外側の爪部２３に、油圧ピストン６０が内蔵されている。この油圧ピストン６０は、爪部２３に形成した圧油供給口６１から油圧室６２に作動油を供給することにより駆動される。 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. In the second embodiment, unlike the first embodiment, 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.
　油圧ピストン６０を駆動すると、爪部２３側に設けられたアウタ側ブレーキパッド２４がディスクロータ２１に当接し、このディスクロータ２１を軸方向に押圧する。この押圧力の反力により、外輪部材２８に連結一体化されたインナ側ブレーキパッド２５がディスクロータ２１に接近するようにキャリパ２２が移動し、インナ側ブレーキパッド２５がディスクロータ２１に当接して、アウタ側ブレーキパッド２４とインナ側ブレーキパッド２５でディスクロータ２１が強く挟み込まれて制動力が発揮される。 When the hydraulic piston 60 is driven, 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.
　上記の各実施形態は例示であって、電動式ブレーキ３が失陥した場合でも、確実に車両１を制動する、という本願発明の課題を解決し得る限りにおいて、電動式ブレーキ３を搭載する車輪２の位置（前輪二輪、後輪二輪、又は四輪全輪）、電動式ブレーキ３とともに内蔵される油圧式ブレーキ４を搭載する車輪２の位置（前輪二輪、後輪二輪、又は四輪全輪）や、失陥判断のフローのステップの順序等を適宜変更することも許容される。 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.
１　車両
２　車輪
３　電動式ブレーキ
４　油圧式ブレーキ
５　ブレーキペダル
９　制動用油圧配管
１０　マスタシリンダ
１１　油圧バルブ
１２　制御装置（油圧バルブ制御装置）
２１　ディスクロータ
２２　キャリパ
２３　爪部
６０　油圧ピストン DESCRIPTION OF SYMBOLS 1 Vehicle 2 Wheel 3 Electric brake 4 Hydraulic brake 5 Brake pedal 9 Brake hydraulic piping 10 Master cylinder 11 Hydraulic valve 12 Control device (hydraulic valve control device)
21 Disc rotor 22 Caliper 23 Claw portion 60 Hydraulic piston

Claims (8)

  1. 　運転者のブレーキ操作によって制動力を発揮する、車両（１）の少なくとも左右二輪に設けられた電動式ブレーキ（３）と、
    　前記電動式ブレーキ（３）の失陥時に、この電動式ブレーキ（３）の代わりに制動力を発揮する油圧式ブレーキ（４）と、
    　前記油圧式ブレーキ（４）は、前記電動式ブレーキ（３）を設けた車輪（２）に前記電動式ブレーキ（３）と共に内蔵され、
    　前記失陥時に、前記油圧式ブレーキ（４）を作動可能な状態とする制御装置（１２）と、
    を有する電動式ブレーキシステム。     An electric brake (3) provided on at least two left and right wheels of the vehicle (1) that exerts a braking force by a driver's brake operation;
    A hydraulic brake (4) that exerts a braking force instead of the electric brake (3) when the electric brake (3) fails;
    The hydraulic brake (4) is built together with the electric brake (3) in a wheel (2) provided with the electric brake (3),
    A control device (12) that activates the hydraulic brake (4) in the event of the failure;
    Electric brake system having
  2. 　前記油圧式ブレーキ（４）が、ドラムブレーキである請求項１に記載の電動式ブレーキシステム。 The electric brake system according to claim 1, wherein the hydraulic brake (4) is a drum brake.
  3. 　前記油圧式ブレーキ（４）が、前記電動式ブレーキ（３）のディスクロータ（２１）を制動するディスクブレーキであって、前記電動式ブレーキ（３）のキャリパ（２２）の外側の爪部（２３）に、このキャリパ（２２）を駆動する油圧ピストン（６０）が内蔵されている請求項１に記載の電動式ブレーキシステム。 The hydraulic brake (4) is a disc brake that brakes the disc rotor (21) of the electric brake (3), and has a claw portion (23) outside the caliper (22) of the electric brake (3). The electric brake system according to claim 1, wherein a hydraulic piston (60) for driving the caliper (22) is incorporated in the electric brake system.
  4. 　ブレーキペダル（５）の操作量に対応して作動するマスタシリンダ（１０）と、
    　前記マスタシリンダ（１０）と前記油圧式ブレーキ（４）とをつなぐ制動用油圧配管（９）と、
    　前記制動用油圧配管（９）の途中に設けられ、前記電動式ブレーキ（３）の正常作動時に閉状態となっている油圧バルブ（１１）と、
    をさらに有し、前記制御装置（１２）は、前記失陥時に、前記油圧バルブ（１１）を閉状態から開状態に切り替える機能を有する請求項１から３のいずれか1項に記載の電動式ブレーキシステム。     A master cylinder (10) that operates in accordance with an operation amount of the brake pedal (5);
    A braking hydraulic pipe (9) connecting the master cylinder (10) and the hydraulic brake (4);
    A hydraulic valve (11) provided in the middle of the braking hydraulic pipe (9) and closed when the electric brake (3) is normally operated;
    The electric device according to any one of claims 1 to 3, wherein the control device (12) has a function of switching the hydraulic valve (11) from a closed state to an open state when the failure occurs. Brake system.
  5. 　前記車両（１）が前後二輪ずつ備えた四輪車であって、前後少なくとも一方の二輪の電動式ブレーキ（３）にパーキングブレーキ機能が設けられている請求項１から４のいずれか1項に記載の電動式ブレーキシステム。 The vehicle (1) according to any one of claims 1 to 4, wherein the vehicle (1) 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 (3). The electric brake system described.
  6. 　前記電動式ブレーキ（３）が失陥したときに運転者に対する警告を表示し、又は警告音を発する警告装置をさらに備えた請求項１から５のいずれか１項に記載の電動式ブレーキシステム。 The electric brake system according to any one of claims 1 to 5, further comprising a warning device that displays a warning to the driver or emits a warning sound when the electric brake (3) fails.
  7. 　請求項１から６のいずれか１項に記載の電動式ブレーキシステムを搭載した車両。 A vehicle equipped with the electric brake system according to any one of claims 1 to 6.
  8. 　全輪に電動式ブレーキ（３）を備えるとともに、油圧式ブレーキ（４）を備えた車両（１）の電動式ブレーキシステムの制御方法において、
    　運転者によるブレーキ操作量を検知するステップと、
    　前記ブレーキ操作量に対応して、前記電動式ブレーキ（３）が作動しているか否かを判断するステップと、
    　前記判断するステップにおいて、前記電動式ブレーキ（３）が失陥していると判断された場合に、全ての電動式ブレーキ（３）の作動を停止するとともに、前記油圧式ブレーキ（４）に連結された制動用油圧配管（９）の途中に設けられた油圧バルブ（１１）を開状態とし、前記ブレーキ操作量に対応して前記油圧式ブレーキ（４）を作動するステップと、
    　前記判断するステップにおいて、前記電動式ブレーキ（３）が正常に作動していると判断された場合に、前記ブレーキ操作量に対応して、前記電動式ブレーキ（３）をそのまま作動させるステップと、
    を有することを特徴とする電動式ブレーキシステムの制御方法。     In the control method of the electric brake system of the vehicle (1) having the electric brake (3) on all the wheels and the hydraulic brake (4),
    Detecting a brake operation amount by a driver;
    Determining whether or not the electric brake (3) is operating in response to the brake operation amount;
    In the determining step, when it is determined that the electric brake (3) has failed, the operation of all the electric brakes (3) is stopped and connected to the hydraulic brake (4). Opening the hydraulic valve (11) provided in the middle of the brake hydraulic pipe (9), and operating the hydraulic brake (4) in response to the brake operation amount;
    In the step of determining, when it is determined that the electric brake (3) is operating normally, the step of operating the electric brake (3) as it is, corresponding to the amount of brake operation;
    A control method for an electric brake system, comprising:
PCT/JP2015/058865 2014-03-25 2015-03-24 Electric brake system, vehicle equipped with electric brake system, and method for controlling electric brake system WO2015146963A1 (en)

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JP2014118409A JP2015193357A (en) 2014-03-25 2014-06-09 Electrically-driven type brake system, vehicle with electrically-driven type brake system mounted thereon, and method for controlling electrically-driven type brake system

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