WO2021192457A1 - Electric parking brake device - Google Patents

Electric parking brake device Download PDF

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Publication number
WO2021192457A1
WO2021192457A1 PCT/JP2020/047376 JP2020047376W WO2021192457A1 WO 2021192457 A1 WO2021192457 A1 WO 2021192457A1 JP 2020047376 W JP2020047376 W JP 2020047376W WO 2021192457 A1 WO2021192457 A1 WO 2021192457A1
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WO
WIPO (PCT)
Prior art keywords
parking brake
electric actuator
vehicle state
electric
control
Prior art date
Application number
PCT/JP2020/047376
Other languages
French (fr)
Japanese (ja)
Inventor
広地 碓井
宏夢 生川
サンディプ プラネ
勝一 寺崎
崇陽 稲毛
Original Assignee
日立Astemo株式会社
日信ブレーキシステムズ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日立Astemo株式会社, 日信ブレーキシステムズ株式会社 filed Critical 日立Astemo株式会社
Priority to JP2022509269A priority Critical patent/JPWO2021192457A1/ja
Publication of WO2021192457A1 publication Critical patent/WO2021192457A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
    • 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
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • 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

Definitions

  • the present invention relates to an electric parking brake device in which the operation and release of the parking brake are switched according to the operation of the electric actuator.
  • Patent Document 1 Such an electric parking brake device is known in Patent Document 1 and Patent Document 2.
  • the present invention has been made in view of such circumstances, and is an electric parking brake device in which appropriate control is performed according to a vehicle state when the electric actuator returns to an operable state after a temporary interruption of operation.
  • the purpose is to provide.
  • the present invention presents a wheel speed detecting means for detecting a wheel speed and a wheel speed detecting means for detecting a wheel speed in an electric parking brake device in which the operation and release of the parking brake are switched according to the operation of the electric actuator. It is provided with a control unit that controls the operation of the electric actuator while having a vehicle state determination unit that determines the vehicle state based on the detected value of the above, and the control unit has a temporary interruption of operation of the electric actuator.
  • the first feature is to restart the apply control of the brake and stop the restart of the apply control of the parking brake when the judgment result of the vehicle state determination unit at the time of the return is running.
  • the vehicle in an electric parking brake device in which the operation and release of the parking brake are switched according to the operation of the electric actuator, the vehicle is based on the wheel speed detecting means for detecting the wheel speed and the detection value of the wheel speed detecting means. It includes a control unit that controls the operation of the electric actuator while having a vehicle state determination unit that determines the state, and the control unit is brought into an operable state after a temporary interruption of operation of the electric actuator occurs.
  • the release control of the parking brake is restarted. This is the second feature.
  • control unit in addition to the configuration of the first feature, is in the middle of the apply control of the parking brake when returning to the operable state after the temporary interruption of operation of the electric actuator occurs.
  • a third feature is to control the operation of the electric actuator in response to a new operation request when it is determined that the operation interruption has occurred and the determination result of the vehicle state determination unit is running.
  • the control unit in addition to the configuration of the first feature, the control unit is in the middle of the release control of the parking brake when returning to the operable state after the temporary interruption of operation of the electric actuator occurs.
  • the release control of the parking brake is executed. This is the fourth feature.
  • control unit in addition to the configuration of the second feature, is in the middle of the apply control of the parking brake when returning to the operable state after the temporary interruption of operation of the electric actuator occurs.
  • the operation of the electric actuator is controlled in response to a new operation request.
  • a drum brake including a wheel cylinder that exerts power to bring a pair of brake shoes into sliding contact with a brake drum is in a parking brake state according to the operation.
  • the sixth feature is that the parking brake lever for obtaining the above and the electric actuator connected to the parking brake lever via the parking brake cable are attached.
  • the vehicle state determination unit determines that the vehicle is running when the detection value of the wheel speed detection means is equal to or higher than a predetermined value.
  • a seventh feature is that when the detection value of the wheel speed detecting means is less than the predetermined value, it is determined that the vehicle is stopped.
  • the electric actuator when the electric actuator returns to the operable state after the temporary operation interruption of the electric actuator occurs, it is determined that the operation interruption occurs in the middle of the apply control of the parking brake.
  • the application control of the parking brake which was incomplete while the vehicle was stopped, it is possible to prevent insufficient braking effect when the vehicle is stopped, and when the vehicle is running, the parking brake is applied. Since the resumption of control is stopped, the braking force is not applied against the driver's intention.
  • the operation interruption occurs in the middle of the release control of the parking brake.
  • the release control of the incomplete parking brake is immediately restarted while the vehicle is stopped, so that it is possible to prevent the brake from being dragged.
  • the third feature of the present invention when it is determined that the operation is interrupted during the application control of the parking brake when the electric actuator returns to the operable state, a new operation request is made during traveling. By controlling the operation of the electric actuator accordingly, it is possible to immediately respond to the driver's request.
  • the vehicle when it is determined that the operation of the electric actuator is temporarily interrupted during the release control of the parking brake when the electric actuator returns to the operable state, the vehicle is stopped. Since the operation of the electric actuator is controlled in response to a new operation request, it is possible to immediately respond to the driver's request.
  • the present invention can be applied to a drum brake having a wheel cylinder.
  • the seventh feature of the present invention it is possible to easily determine whether the vehicle is running or stopped based on the detection value of the wheel speed detecting means.
  • FIG. 1 is a front view of the drum brake.
  • FIG. 2 is a rear view of the drum brake.
  • FIG. 3 is a block diagram showing a configuration for controlling an electric actuator.
  • FIG. 4 is a timing chart when the vehicle is stopped at the time of returning after a temporary interruption of operation of the electric actuator occurs during the apply control of the parking brake.
  • FIG. 5 is a timing chart when the vehicle is running at the time of return after a temporary interruption of operation of the electric actuator occurs during the apply control of the parking brake.
  • FIG. 5 is a timing chart when the vehicle is running at the time of return after a temporary interruption of operation of the electric actuator occurs during the apply control of the parking brake.
  • FIG. 6 is a timing chart when an operation request is made at the time of return after a temporary operation interruption of the electric actuator occurs during the apply control of the parking brake.
  • FIG. 7 is a timing chart when the vehicle is running at the time of returning after a temporary interruption of operation of the electric actuator occurs during the release control of the parking brake.
  • FIG. 8 is a timing chart when an operation request is made while the vehicle is stopped at the time of returning after a temporary operation interruption of the electric actuator occurs during the release control of the parking brake.
  • FIGS. 1 to 8 An embodiment of the present invention will be described with reference to FIGS. 1 to 8 attached to the invention.
  • a drum brake B is provided on a wheel of a four-wheeled vehicle, for example, the left rear wheel, and the drum brake B is fixed with a through hole 12 in the center for penetrating the axle 11 of the left rear wheel.
  • the first and second brake shoes 15, 16 and the first and second brake shoes 15 and 16 arranged in the back plate 13 so as to be slidable with the back plate 13 and the inner circumference of the brake drum 14 rotating with the left rear wheel.
  • a braking gap automatic adjusting means (so-called auto adjuster) 18 for automatically adjusting the gap and a return spring 19 provided between the first and second brake shoes 15 and 16 are provided.
  • the first and second brake shoes 15 and 16 include the first and second webs 15a and 16a formed in a bow-shaped flat plate shape along the inner circumference of the brake drum 14, and their first and second webs 15a and 16a.
  • the first and second rims 15b and 16b which are connected so as to be orthogonal to the outer periphery of the second webs 15a and 16a, and the first and 16b which are attached to the outer periphery of the first and second rims 15b and 16b. It consists of a second lining 15c and 16c.
  • an anchor plate 21 serving as a fulcrum during expansion and contraction of the first and second brake shoes 15 and 16 is provided at one end of the first and second webs 15a and 16a (this embodiment). Then, the lower end portion) is fixed so as to be rotatably supported. Further, the wheel cylinder 17 is operated by the output hydraulic pressure of a master cylinder (not shown) operated by a brake pedal to expand the first and second brake shoes 15 and 16 with the anchor plate 21 as a fulcrum. A pair of pistons 20 included in the wheel cylinder 17 are fixed to the back plate 13 between the other ends of the first and second brake shoes 15 and 16 so as to exert a driving force to the side. The outer end portion is arranged so as to face the other end portion (upper end portion in this embodiment) of the first and second webs 15a and 16a.
  • a coil spring 22 is provided between the one ends of the first and second webs 15a and 16a to urge the one ends of the first and second webs 15a and 16a toward the anchor plate 21.
  • a pair of return springs 19 for urging the first and second brake shoes 15 and 16 in the contraction direction are provided between the other ends of the first and second webs 15a and 16a.
  • the braking gap automatic adjusting means 18 is provided between the first and second webs 15a and 16a of the first and second brake shoes 15 and 16, and is a contraction position regulating that can be extended by rotation of the adjusting gear 23. It has a strut 24 and a feed claw 25a that engages with the adjust gear 23, and can rotate to the second web 16a of the second brake shoe 16 of the first and second brake shoes 15 and 16. It is composed of an adjusting lever 25 that is supported and an adjusting spring 26 that rotates and urges the adjusting lever 25 to the side that rotates the adjusting gear 23 in a direction that extends the contraction position regulating strut 24.
  • the contraction position regulating strut 24 regulates the contraction positions of the first and second brake shoes 15 and 16, and the first brake shoe 15 of the first and second brake shoes 15 and 16 includes the first and second brake shoes 15 and 16.
  • a first rod 27 having a first engaging connecting portion 27a that engages with the other end of the first web 15a and a second web 16a provided with the second brake shoe 16 near the other end.
  • a second rod 28 having a second engaging connecting portion 28a that engages with the first rod 27 and arranged coaxially with the first rod 27, and one end of the first rod 27 being inserted into the first rod 27 so as to be relatively movable in the axial direction.
  • the two rods 28 have an adjusting bolt 29 whose other end is coaxially screwed, and the adjusting gear 23 is arranged between the first and second rods 27 and 28 to provide an outer circumference of the adjusting bolt 29. Is formed in.
  • a first locking recess 30 for engaging the first engaging connecting portion 27a is provided on the side edge of the first web 15a near the other end and facing the axle 11 side, and the second web 16a is provided.
  • a second locking recess 31 for engaging the second engaging connecting portion 28a is provided on the side edge facing the axle 11 side near the other end portion of the above.
  • the adjusting lever 25 having a feed claw 25a that engages with the adjusting gear 23 is rotatably supported by the second web 16a via a support shaft 32, and is rotatably supported between the second web 16a and the adjusting lever 25. Is provided with the adjust spring 26. Moreover, the spring force of the adjust spring 26 is set to be smaller than the spring force of the return spring 19.
  • the first and second linings 15c and 16c are worn when the first and second brake shoes 15 and 16 are extended by the operation of the wheel cylinder 17.
  • the adjustment lever 25 is expanded by a certain value or more due to the above, the adjustment lever 25 is rotated around the axis of the support shaft 32 by the spring force of the adjustment spring 26, whereby the adjustment gear 23 is rotated.
  • the effective length of the contraction position regulating strut 24 is increased and corrected accordingly.
  • the drum brake B includes a parking brake lever 34 capable of generating a parking brake force according to the operation, and the parking brake lever 34 is one of the first webs 15a of the first brake shoe 15.
  • the brake drum 14 is arranged so as to overlap with each other in a front view (direction shown in FIG. 1) in a direction along the rotation axis of the brake drum 14, and extends long along the longitudinal direction of the first web 15a.
  • An engaging piece 36 fixed to one end of the brake cable 37 is engaged with one end of the parking brake lever 34 (the lower end in this embodiment), and the other end of the parking brake lever 34 (this).
  • the upper end portion is connected to the other end portion of the first web 15a in the first brake shoe 15 via a pin 35.
  • the parking brake lever 34 When the parking brake of the vehicle is activated, the parking brake lever 34 is rotated and driven in the counterclockwise direction of FIG. 1 with the pin 35 as a fulcrum by the traction force input from the brake cable 37. Due to the rotation of the lever 34, a force in a direction in which the second lining 16c of the brake shoe 16 is pressed against the inner circumference of the brake drum 14 is applied to the second brake shoe 16 via the contraction position regulating strut 24. To work. Further, when the parking brake lever 34 is continuously rotated and driven in the counterclockwise direction of FIG. 1, the parking brake lever 34 engages with the first engaging connecting portion 27a of the contraction position regulating strut 24.
  • the parking brake lever 34 operates at an operating position where the first and second linings 15c and 16c of the first and second brake shoes 15 and 16 are in pressure contact with the inner circumference of the brake drum 14. , The parking brake state can be obtained in this state.
  • the first operation is performed by the spring force of the return spring 19 in a direction away from the inner circumference of the brake drum 14.
  • the parking brake lever 34 returns to the non-operating position together with the second brake shoes 15 and 16, and the parking brake lever 34 is urged toward the non-operating position side.
  • the brake cable 37 is towed by the power exerted by the electric actuator 38, and the electric actuator 38 has a screw shaft 39 connected to the brake cable 37 and the screw shaft 39.
  • An actuator case 40 that supports the screw shaft 39 so as to be able to reciprocate in the axial direction while blocking its rotation, an electric motor 41 that can freely rotate in the forward and reverse directions and is housed in the actuator case 40, and the electric motor 41.
  • a motion conversion mechanism (not shown) interposed between the electric motor 41 and the screw shaft 39 and housed in the actuator case 40 while making it possible to convert the generated rotary motion into the linear motion of the screw shaft 39. ) And.
  • the actuator case 40 of the electric actuator 38 is attached to the back plate 13 on the opposite side of the wheel cylinder 17 via the attachment member 43.
  • the mounting member 43 is fixed to the actuator case 40, and the mounting member 43 is fastened to the back plate 13 with a plurality of, for example, three bolts 44.
  • the screw shaft 39 of the electric actuator 38 is connected to the brake cable 37 via a cable joint 51, and the screw shaft 39 and the connecting portion of the brake cable 37 are protected to be coupled to the actuator case 40. Covered with a cylinder 50.
  • a tubular portion 13a is integrally projected from the lower portion of the back plate 13 along the vehicle front-rear direction, and the brake cable 37 is introduced into the back plate 13 from the tubular portion 13a. Further, the brake cable 37 is covered with an outer cable 45 formed by winding an iron wire rod in a coil shape between the protective cylinder 50 and the cylinder portion 13a.
  • the end of the outer cable 45 on the electric actuator 38 side is attached to the protective cylinder 50 via the guide tube 52, and the end of the outer cable 45 on the back plate 13 side is the end via the guide tube 53. It is attached to the tubular portion 13a.
  • a holding plate 46 sandwiching the anchor plate 21 with the back plate 13 is formed by a pair of rivets 47 together with the anchor plate 21 to form the back plate.
  • a guide portion 46a which is attached to the lower part of the 13 and guides the brake cable 37 together with the outer cable 45, is integrally provided on the holding plate 46 so as to have a substantially U-shaped cross-sectional shape.
  • the electric power of the power source 61 is supplied to the electric motor 41 of the electric actuator 38 via the drive circuit 62, and the operation of the electric motor 41 for switching the operation and release of the parking brake, that is, the said.
  • the operation of the drive circuit 62 is controlled by the control unit C.
  • the control unit C includes an instruction means 63 that detects that the driver has performed an operation for obtaining the parking brake state by operating the electric actuator 38 and outputs a signal for obtaining the parking brake state, and a wheel speed.
  • the detection means 64 and the accelerator operation amount detecting means 65 for determining whether or not the driver intends to drive are connected.
  • control unit C has a vehicle state determination unit 66 that determines a vehicle state based on the detection value of the wheel speed detection means 64, and the vehicle state determination unit 66 has the wheel speed detection means 64.
  • the detected value of is equal to or greater than a predetermined value, it is determined that the vehicle is running, and when the detected value of the wheel speed detecting means 64 is less than the predetermined value, it is determined that the vehicle is stopped.
  • the operation of the electric motor 41 for switching the operation and release of the parking brake may be interrupted due to a temporary voltage drop of the power supply 61 or the like, and in such a case, the electric actuator 38 may be interrupted after the operation is interrupted.
  • the control unit C controls the electric actuator 38 as follows.
  • the control unit C determines that the operation interruption has occurred.
  • the apply control of the parking brake is restarted, and when the determination result of the vehicle state determination unit 66 at the time of return is running. The restart of the application control of the parking brake is stopped.
  • the operation of the electric actuator 38 was interrupted due to the system down at time t1 during the application control of the electric actuator 38 in response to the operation request for obtaining the operating state of the parking brake. Later, at time t2 when the electric actuator 38 can be operated by returning the system, when the vehicle state is stopped, the electric actuator 38 resumes the operation for obtaining the parking brake state at that time t2. It will be.
  • the operation of the electric actuator 38 was interrupted due to the system down at time t3 during the application control of the electric actuator 38 in response to the operation request for obtaining the operating state of the parking brake. Later, at time t4 when the electric actuator 38 can be operated by returning the system, the operation of the electric actuator 38 remains stopped when the vehicle state is running.
  • the control unit C controls the operation of the electric actuator 38 in response to the operation request, and at the time t4, the operation is controlled.
  • the control unit C executes the release control of the parking brake.
  • the control unit C has the control unit C.
  • the determination result of the vehicle condition determination unit 66 at the time of return is running, the release control of the parking brake is restarted, and when the determination result of the vehicle condition determination unit 66 is stopped, a new operation request is made. The operation of the electric actuator 38 is controlled accordingly.
  • the operation of the electric actuator 38 was interrupted due to the system down at time t5 during the release control of the electric actuator 38 in response to the operation request for obtaining the operating state of the parking brake. Later, at time t6 when the electric actuator 38 can be operated by returning the system, release control of the electric actuator 38 is performed so that the parking brake is released at that time t6 when the vehicle state is running. It will resume. Further, as shown in FIG. 8, when the vehicle state is stopped and a new operation request is made at the time t6 when the electric actuator 38 can be operated by the system return, the operation request is received. It controls the operation of the electric actuator 38.
  • a control unit C that controls the operation of the electric actuator 38 while having the vehicle state determination unit 66 that determines the vehicle state based on the detection value of the wheel speed detecting means 64
  • the vehicle state determination unit at the time of the return is determined.
  • the apply control of the parking brake is restarted, and when the determination result of the vehicle state determination unit 66 at the time of return is running, the apply control of the parking brake is restarted.
  • control unit C determines that the operation interruption has occurred during the application control of the parking brake at the time of returning to the operable state after the temporary operation interruption of the electric actuator 38 has occurred.
  • the control unit C determines that the operation interruption has occurred.
  • the determination result of the vehicle state determination unit 66 is running, the operation of the electric actuator 38 is controlled in response to a new operation request, so that the driver's request can be immediately responded and the driver can drive.
  • the release control of the parking brake is executed, so that the driver's intention can be immediately responded to.
  • control unit C determines that the operation interruption has occurred during the release control of the parking brake at the time of returning to the operable state after the temporary operation interruption of the electric actuator 38 has occurred, the operation interruption thereof is performed.
  • the determination result of the vehicle state determination unit 66 at the time of return is running, the release control of the parking brake is restarted, so that the occurrence of brake drag can be prevented.
  • the control unit C returns to the operable state after the temporary operation interruption of the electric actuator 38 occurs, the operation of the electric actuator 38 is temporarily interrupted during the release control of the parking brake.
  • the operation of the electric actuator 38 is controlled in response to a new operation request, so that the driver's request is immediately responded to. can do.
  • the drum brake B provided with the wheel cylinder 17 is provided with a parking brake lever 34 that obtains a parking brake state according to the operation, and the electric actuator 38 that is connected to the parking brake lever 34 via a parking brake cable 37. Therefore, the present invention can be applied to the drum brake B having the wheel cylinder 17.
  • the vehicle state determination unit 66 included in the control unit C determines that the vehicle is running when the detection value of the wheel speed detection means 64 is equal to or higher than a predetermined value, and the detection value of the wheel speed detection means 64 is determined to be running. Since it is determined that the vehicle is stopped when the value is less than the predetermined value, it can be easily determined whether the vehicle is running or stopped based on the detection value of the wheel speed detecting means 64.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Regulating Braking Force (AREA)

Abstract

Provided is an electric parking brake device in which the operation and release of a parking brake is switched according to the operation of an electric actuator. A control unit (C) controls the operation of the electric actuator (38) while having a vehicle state determination unit (66) that determines a vehicle state on the basis of a detection value from a wheel speed detection means (64). When the control unit (C) is returning the electric actuator (38) to an operable state after a temporary operation interruption of the electric actuator (38) has occurred, if the control unit (C) has determined that the operation interruption occurred during application control of the parking brake, the control unit (C) resumes application control of the parking brake when the determination result of the vehicle state determination unit (66) at the time of the return thereof was obtained while the vehicle was stopped, and the control unit (C) stops the resumption of application control of the parking brake when the determination result of the vehicle state determination unit (66) at the time of the return thereof was obtained while the vehicle was traveling. Through this, appropriate control can be implemented according to the vehicle state when returning the electric actuator to an operable state after a temporary operation interruption thereof.

Description

電動パーキングブレーキ装置Electric parking brake device
　本発明は、パーキングブレーキの作動および解除が電動アクチュエータの作動に応じて切り替えられる電動パーキングブレーキ装置に関する。 The present invention relates to an electric parking brake device in which the operation and release of the parking brake are switched according to the operation of the electric actuator.
　このような電動パーキングブレーキ装置は、特許文献１および特許文献２で知られている。 Such an electric parking brake device is known in Patent Document 1 and Patent Document 2.
日本特許第４４６６５８２号公報Japanese Patent No. 4466582 日本特許第６２９７８８３号公報Japanese Patent No. 6297883
　上記特許文献１で開示されたものでは、電動アクチュエータの一時的な作動中断後に作動可能状態に復帰したときにパーキングブレーキのリリース制御が未完了であった場合には、サービスブレーキ操作部材の非操作状態ではパーキングブレーキのリリース制御を実行しないようにして未完了であった制御を再開することで、電動アクチュエータの復帰に伴って車両が不所望に動き出してしまうような自体が生じるのを防止している。しかるにパーキングブレーキのアプライ制御の途中で電動アクチュエータの作動中断が生じた場合、電動アクチュエータの作動可能状態への復帰時に車両が走行中であるときには、運転者の意図に反してブレーキ力がかかってしまう可能性がある。 According to the above-mentioned Patent Document 1, if the release control of the parking brake is not completed when the electric actuator is returned to the operable state after the operation is temporarily interrupted, the service brake operating member is not operated. By not executing the release control of the parking brake in the state and resuming the incomplete control, it is possible to prevent the vehicle from undesirably starting to move with the return of the electric actuator. There is. However, if the operation of the electric actuator is interrupted during the application control of the parking brake, the braking force will be applied against the driver's intention when the vehicle is running when the electric actuator is returned to the operable state. there is a possibility.
　また上記特許文献２で開示されたものでは、電動アクチュエータの一時的な作動中断後の作動可能状態への復帰時には、新たな作動要求に応じて電動アクチュエータの作動を制御することで、運転者の意志に応じた制御再開を可能としている。しかるに電動アクチュエータの一時的な作動中断の前後で車両状態が同じ状態にある場合には、未完了の制御が直ちに再開されないと、パーキングブレーキのリリース制御の場合には車両走行時のブレーキの引きずりが生じる可能性が高まり、またパーキングブレーキのアプライ制御の場合には停車状態でのブレーキ効力不足が生じる可能性がある。 Further, in the one disclosed in Patent Document 2, when the electric actuator returns to the operable state after a temporary interruption of operation, the operation of the electric actuator is controlled in response to a new operation request, thereby causing the driver to operate. It is possible to resume control according to the will. However, if the vehicle state is the same before and after the temporary suspension of operation of the electric actuator, the incomplete control must be restarted immediately, or in the case of the parking brake release control, the brake drag during vehicle running. It is more likely to occur, and in the case of parking brake apply control, there is a possibility that the braking effect will be insufficient when the vehicle is stopped.
　本発明は、かかる事情に鑑みてなされたものであり、電動アクチュエータの一時的な作動中断後の作動可能状態への復帰時に車両状態に応じた適切な制御が行なわれるようにした電動パーキングブレーキ装置を提供することを目的とする。 The present invention has been made in view of such circumstances, and is an electric parking brake device in which appropriate control is performed according to a vehicle state when the electric actuator returns to an operable state after a temporary interruption of operation. The purpose is to provide.
　上記目的を達成するために、本発明は、パーキングブレーキの作動および解除が電動アクチュエータの作動に応じて切り替えられる電動パーキングブレーキ装置において、車輪速度を検出する車輪速度検出手段と、当該車輪速度検出手段の検出値に基づいて車両状態を判断する車両状態判断部を有しつつ前記電動アクチュエータの作動を制御する制御ユニットとを備え、当該制御ユニットは、前記電動アクチュエータの一時的な作動中断が生じた後の作動可能状態への復帰時に前記パーキングブレーキのアプライ制御の途中で前記作動中断が生じたと判断した場合に、その復帰時の前記車両状態判断部の判断結果が停車中であったときには前記パーキングブレーキのアプライ制御を再開し、前記復帰時の前記車両状態判断部の判断結果が走行中であったときには前記パーキングブレーキのアプライ制御の再開を停止することを第１の特徴とする。 In order to achieve the above object, the present invention presents a wheel speed detecting means for detecting a wheel speed and a wheel speed detecting means for detecting a wheel speed in an electric parking brake device in which the operation and release of the parking brake are switched according to the operation of the electric actuator. It is provided with a control unit that controls the operation of the electric actuator while having a vehicle state determination unit that determines the vehicle state based on the detected value of the above, and the control unit has a temporary interruption of operation of the electric actuator. When it is determined that the operation is interrupted during the application control of the parking brake at the time of returning to the operable state later, and the judgment result of the vehicle state determining unit at the time of returning is that the parking is stopped. The first feature is to restart the apply control of the brake and stop the restart of the apply control of the parking brake when the judgment result of the vehicle state determination unit at the time of the return is running.
　また本発明は、パーキングブレーキの作動および解除が電動アクチュエータの作動に応じて切り替えられる電動パーキングブレーキ装置において、車輪速度を検出する車輪速度検出手段と、当該車輪速度検出手段の検出値に基づいて車両状態を判断する車両状態判断部を有しつつ前記電動アクチュエータの作動を制御する制御ユニットとを備え、当該制御ユニットは、前記電動アクチュエータの一時的な作動中断が生じた後の作動可能状態への復帰時に前記パーキングブレーキのリリース制御の途中で前記作動中断が生じたと判断した場合に、その復帰時の前記車両状態判断部の判断結果が走行中であったときには前記パーキングブレーキのリリース制御を再開することを第２の特徴とする。 Further, according to the present invention, in an electric parking brake device in which the operation and release of the parking brake are switched according to the operation of the electric actuator, the vehicle is based on the wheel speed detecting means for detecting the wheel speed and the detection value of the wheel speed detecting means. It includes a control unit that controls the operation of the electric actuator while having a vehicle state determination unit that determines the state, and the control unit is brought into an operable state after a temporary interruption of operation of the electric actuator occurs. When it is determined that the operation interruption has occurred during the release control of the parking brake at the time of return, and the determination result of the vehicle state determination unit at the time of return is running, the release control of the parking brake is restarted. This is the second feature.
　本発明は、第１の特徴の構成に加えて、前記制御ユニットは、前記電動アクチュエータの一時的な作動中断が生じた後の作動可能状態への復帰時に、前記パーキングブレーキのアプライ制御の途中で前記作動中断が生じたと判断した場合に、前記車両状態判断部の判断結果が走行中であったときには新たな作動要求に応じて前記電動アクチュエータの作動を制御することを第３の特徴とする。 In the present invention, in addition to the configuration of the first feature, the control unit is in the middle of the apply control of the parking brake when returning to the operable state after the temporary interruption of operation of the electric actuator occurs. A third feature is to control the operation of the electric actuator in response to a new operation request when it is determined that the operation interruption has occurred and the determination result of the vehicle state determination unit is running.
　本発明は、第１の特徴の構成に加えて、前記制御ユニットは、前記電動アクチュエータの一時的な作動中断が生じた後の作動可能状態への復帰時に、前記パーキングブレーキのリリース制御の途中で前記作動中断が生じたと判断した場合に、前記車両状態判断部の判断結果が走行中であったときに運転者が走行を意図していると判断したときには、前記パーキングブレーキのリリース制御を実行することを第４の特徴とする。 In the present invention, in addition to the configuration of the first feature, the control unit is in the middle of the release control of the parking brake when returning to the operable state after the temporary interruption of operation of the electric actuator occurs. When it is determined that the operation interruption has occurred, and when it is determined that the driver intends to drive when the determination result of the vehicle state determination unit is running, the release control of the parking brake is executed. This is the fourth feature.
　本発明は、第２の特徴の構成に加えて、前記制御ユニットは、前記電動アクチュエータの一時的な作動中断が生じた後の作動可能状態への復帰時に、前記パーキングブレーキのアプライ制御の途中で前記電動アクチュエータの一時的な作動中断が生じたと判断した場合に、前記車両状態判断部の判断結果が停車中であったときには、新たな作動要求に応じて前記電動アクチュエータの作動を制御することを第５の特徴とする。 In the present invention, in addition to the configuration of the second feature, the control unit is in the middle of the apply control of the parking brake when returning to the operable state after the temporary interruption of operation of the electric actuator occurs. When it is determined that the operation of the electric actuator is temporarily interrupted and the determination result of the vehicle state determination unit is stopped, the operation of the electric actuator is controlled in response to a new operation request. This is the fifth feature.
　本発明は、第１～第５の特徴の構成のいずれかに加えて、一対のブレーキシューをブレーキドラムに摺接させる動力を発揮するホイールシリンダを備えるドラムブレーキに、作動に応じてパーキングブレーキ状態を得るパーキングブレーキレバーと、そのパーキングブレーキレバーにパーキングブレーキケーブルを介して連結される前記電動アクチュエータとが付設されることを第６の特徴とする。 In the present invention, in addition to any of the configurations of the first to fifth features, a drum brake including a wheel cylinder that exerts power to bring a pair of brake shoes into sliding contact with a brake drum is in a parking brake state according to the operation. The sixth feature is that the parking brake lever for obtaining the above and the electric actuator connected to the parking brake lever via the parking brake cable are attached.
　さらに本発明は、第１～第６の特徴の構成のいずれかに加えて、前記車両状態判断部は、前記車輪速度検出手段の検出値が所定値以上であるときに走行中であると判断し、前記車輪速度検出手段の検出値が前記所定値未満であるときに停車中であると判断することを第７の特徴とする。 Further, in the present invention, in addition to any of the configurations of the first to sixth features, the vehicle state determination unit determines that the vehicle is running when the detection value of the wheel speed detection means is equal to or higher than a predetermined value. A seventh feature is that when the detection value of the wheel speed detecting means is less than the predetermined value, it is determined that the vehicle is stopped.
　本発明の第１の特徴によれば、電動アクチュエータの一時的な作動中断が生じた後で電動アクチュエータが作動可能状態に復帰したときに、パーキングブレーキのアプライ制御の途中で作動中断が生じたと判断した場合の停車中には未完了であったパーキングブレーキのアプライ制御を直ちに再開することによって停車時のブレーキ効力の不足が生じることを防止することができ、また走行中であるときにはパーキングブレーキのアプライ制御の再開を停止するので運転者の意図に反してブレーキ力がかかってしまうことはない。 According to the first feature of the present invention, when the electric actuator returns to the operable state after the temporary operation interruption of the electric actuator occurs, it is determined that the operation interruption occurs in the middle of the apply control of the parking brake. By immediately resuming the application control of the parking brake, which was incomplete while the vehicle was stopped, it is possible to prevent insufficient braking effect when the vehicle is stopped, and when the vehicle is running, the parking brake is applied. Since the resumption of control is stopped, the braking force is not applied against the driver's intention.
　また本発明の第２の特徴によれば、電動アクチュエータの一時的な作動中断が生じた後で電動アクチュエータが作動可能状態に復帰したときに、パーキングブレーキのリリース制御の途中で作動中断が生じたと判断した場合の停車中には未完了のパーキングブレーキのリリース制御を直ちに再開するので、ブレーキの引きずりの発生を防止することができる。 Further, according to the second feature of the present invention, when the electric actuator returns to the operable state after the temporary operation interruption of the electric actuator occurs, the operation interruption occurs in the middle of the release control of the parking brake. When it is determined, the release control of the incomplete parking brake is immediately restarted while the vehicle is stopped, so that it is possible to prevent the brake from being dragged.
　本発明の第３の特徴によれば、電動アクチュエータが作動可能状態に復帰したときに、パーキングブレーキのアプライ制御の途中で作動中断が生じたと判断した場合の走行中には、新たな作動要求に応じて前記電動アクチュエータの作動を制御することによって、運転者の要求に即時に対応することができる。 According to the third feature of the present invention, when it is determined that the operation is interrupted during the application control of the parking brake when the electric actuator returns to the operable state, a new operation request is made during traveling. By controlling the operation of the electric actuator accordingly, it is possible to immediately respond to the driver's request.
　本発明の第４の特徴によれば、電動アクチュエータが作動可能状態に復帰したときに、パーキングブレーキのアプライ制御の途中で作動中断が生じたと判断した場合の走行中には、運転者の走行意図によってパーキングブレーキのリリース制御を実行するので、運転者の意図に即時に対応することができる。 According to the fourth feature of the present invention, when it is determined that the operation is interrupted during the application control of the parking brake when the electric actuator returns to the operable state, the driver's driving intention during the traveling Since the release control of the parking brake is executed by the driver, it is possible to immediately respond to the driver's intention.
　本発明の第５の特徴によれば、電動アクチュエータが作動可能状態に復帰したときに、パーキングブレーキのリリース制御の途中で電動アクチュエータの一時的な作動中断が生じたと判断した場合の停車中には、新たな作動要求に応じて前記電動アクチュエータの作動を制御するので、運転者の要求に即時に対応することができる。 According to the fifth feature of the present invention, when it is determined that the operation of the electric actuator is temporarily interrupted during the release control of the parking brake when the electric actuator returns to the operable state, the vehicle is stopped. Since the operation of the electric actuator is controlled in response to a new operation request, it is possible to immediately respond to the driver's request.
　本発明の第６の特徴によれば、ホイールシリンダを有するドラムブレーキに本発明を適用することができる。 According to the sixth feature of the present invention, the present invention can be applied to a drum brake having a wheel cylinder.
　さらに本発明の第７の特徴によれば、車輪速度検出手段の検出値によって車両が走行中であるか、停車中であるかを簡単に判断することができる。 Further, according to the seventh feature of the present invention, it is possible to easily determine whether the vehicle is running or stopped based on the detection value of the wheel speed detecting means.
図１はドラムブレーキの正面図である。（第１の実施の形態）FIG. 1 is a front view of the drum brake. (First Embodiment) 図２はドラムブレーキの背面図である。（第１の実施の形態）FIG. 2 is a rear view of the drum brake. (First Embodiment) 図３は電動アクチュエータを制御するための構成を示すブロック図である。（第１の実施の形態）FIG. 3 is a block diagram showing a configuration for controlling an electric actuator. (First Embodiment) 図４はパーキングブレーキのアプライ制御の途中で電動アクチュエータの一時的な作動中断が生じた後の復帰時に停車中であったときのタイミングチャートである。（第１の実施の形態）FIG. 4 is a timing chart when the vehicle is stopped at the time of returning after a temporary interruption of operation of the electric actuator occurs during the apply control of the parking brake. (First Embodiment) 図５はパーキングブレーキのアプライ制御の途中で電動アクチュエータの一時的な作動中断が生じた後の復帰時に走行中であったときのタイミングチャートである。（第１の実施の形態）FIG. 5 is a timing chart when the vehicle is running at the time of return after a temporary interruption of operation of the electric actuator occurs during the apply control of the parking brake. (First Embodiment) 図６はパーキングブレーキのアプライ制御の途中で電動アクチュエータの一時的な作動中断が生じた後の復帰時に作動要求があったときのタイミングチャートである。（第１の実施の形態）FIG. 6 is a timing chart when an operation request is made at the time of return after a temporary operation interruption of the electric actuator occurs during the apply control of the parking brake. (First Embodiment) 図７はパーキングブレーキのリリース制御の途中で電動アクチュエータの一時的な作動中断が生じた後の復帰時に走行中であったときのタイミングチャートである。（第１の実施の形態）FIG. 7 is a timing chart when the vehicle is running at the time of returning after a temporary interruption of operation of the electric actuator occurs during the release control of the parking brake. (First Embodiment) 図８はパーキングブレーキのリリース制御の途中で電動アクチュエータの一時的な作動中断が生じた後の復帰時の停車中に作動要求があったときのタイミングチャートである。（第１の実施の形態）FIG. 8 is a timing chart when an operation request is made while the vehicle is stopped at the time of returning after a temporary operation interruption of the electric actuator occurs during the release control of the parking brake. (First Embodiment)
１４・・・ブレーキドラム
１５，１６・・・ブレーキシュー
１７・・・ホイールシリンダ
３４・・・パーキングブレーキレバー
３７・・・パーキングブレーキケーブル
３８・・・電動アクチュエータ
６４・・・車輪速度検出手段
６６・・・車両状態判断部
Ｂ・・・ドラムブレーキ
Ｃ・・・制御ユニット 14 ... Brake drums 15, 16 ... Brake shoes 17 ... Wheel cylinder 34 ... Parking brake lever 37 ... Parking brake cable 38 ... Electric actuator 64 ... Wheel speed detection means 66.・ ・ Vehicle condition judgment unit B ・ ・ ・ Drum brake C ・ ・ ・ Control unit
　本発明の実施の形態について、添付の図１～図８を参照しながら説明する。 An embodiment of the present invention will be described with reference to FIGS. 1 to 8 attached to the invention.
第１の実施の形態First Embodiment
　先ず図１において、四輪車両の車輪たとえば左後輪にドラムブレーキＢが設けられており、このドラムブレーキＢは、前記左後輪の車軸１１を貫通させる貫通孔１２を中央部に有する固定のバックプレート１３と、前記左後輪とともに回転するブレーキドラム１４の内周に摺接することを可能として前記バックプレート１３内に配置される第１および第２のブレーキシュー１５，１６と、第１および第２のブレーキシュー１５，１６が拡張作動する力を発揮するようにして前記バックプレート１３に固定されるホイールシリンダ１７と、第１および第２のブレーキシュー１５，１６および前記ブレーキドラム１４間の間隙を自動的に調整する制動間隙自動調整手段（所謂オートアジャスタ）１８と、第１および第２のブレーキシュー１５，１６間に設けられるリターンスプリング１９とを備える。 First, in FIG. 1, a drum brake B is provided on a wheel of a four-wheeled vehicle, for example, the left rear wheel, and the drum brake B is fixed with a through hole 12 in the center for penetrating the axle 11 of the left rear wheel. The first and second brake shoes 15, 16 and the first and second brake shoes 15 and 16 arranged in the back plate 13 so as to be slidable with the back plate 13 and the inner circumference of the brake drum 14 rotating with the left rear wheel. Between the wheel cylinder 17 fixed to the back plate 13 so that the second brake shoes 15 and 16 exert an extended operating force, and between the first and second brake shoes 15 and 16 and the brake drum 14. A braking gap automatic adjusting means (so-called auto adjuster) 18 for automatically adjusting the gap and a return spring 19 provided between the first and second brake shoes 15 and 16 are provided.
　第１および第２のブレーキシュー１５，１６は、前記ブレーキドラム１４の内周に沿うようにして弓形の平板状に形成される第１および第２のウエブ１５ａ，１６ａと、それらの第１および第２のウエブ１５ａ，１６ａの外周に直交するように連設される第１および第２のリム１５ｂ，１６ｂと、第１および第２のリム１５ｂ，１６ｂの外周に貼着される第１および第２のライニング１５ｃ，１６ｃとから成る。 The first and second brake shoes 15 and 16 include the first and second webs 15a and 16a formed in a bow-shaped flat plate shape along the inner circumference of the brake drum 14, and their first and second webs 15a and 16a. The first and second rims 15b and 16b which are connected so as to be orthogonal to the outer periphery of the second webs 15a and 16a, and the first and 16b which are attached to the outer periphery of the first and second rims 15b and 16b. It consists of a second lining 15c and 16c.
　前記バックプレート１３には、第１および第２のブレーキシュー１５，１６の拡張、収縮時の支点となるアンカープレート２１が、第１および第２のウエブ１５ａ，１６ａの一端部（この実施の形態では下端部）を回動可能に支持するようにして固設される。また前記ホイールシリンダ１７は、ブレーキペダルで操作されるマスタシリンダ（図示せず）の出力液圧によって作動して、前記アンカープレート２１を支点として第１および第２のブレーキシュー１５，１６を拡張する側に駆動する力を発揮するようにして、第１および第２のブレーキシュー１５，１６の他端部間で前記バックプレート１３に固定されており、このホイールシリンダ１７が備える一対のピストン２０の外端部は、第１および第２のウエブ１５ａ，１６ａの他端部（この実施の形態では上端部）に対向するように配置される。 On the back plate 13, an anchor plate 21 serving as a fulcrum during expansion and contraction of the first and second brake shoes 15 and 16 is provided at one end of the first and second webs 15a and 16a (this embodiment). Then, the lower end portion) is fixed so as to be rotatably supported. Further, the wheel cylinder 17 is operated by the output hydraulic pressure of a master cylinder (not shown) operated by a brake pedal to expand the first and second brake shoes 15 and 16 with the anchor plate 21 as a fulcrum. A pair of pistons 20 included in the wheel cylinder 17 are fixed to the back plate 13 between the other ends of the first and second brake shoes 15 and 16 so as to exert a driving force to the side. The outer end portion is arranged so as to face the other end portion (upper end portion in this embodiment) of the first and second webs 15a and 16a.
　第１および第２のウエブ１５ａ，１６ａの前記一端部間には、それらの第１および第２のウエブ１５ａ，１６ａの前記一端部を前記アンカープレート２１側に付勢するコイルスプリング２２が設けられ、第１および第２のウエブ１５ａ，１６ａの他端部間には、第１および第２のブレーキシュー１５，１６を収縮方向に付勢する一対の前記リターンスプリング１９が設けられる。 A coil spring 22 is provided between the one ends of the first and second webs 15a and 16a to urge the one ends of the first and second webs 15a and 16a toward the anchor plate 21. A pair of return springs 19 for urging the first and second brake shoes 15 and 16 in the contraction direction are provided between the other ends of the first and second webs 15a and 16a.
　前記制動間隙自動調整手段１８は、第１および第２のブレーキシュー１５，１６が有する第１および第２のウエブ１５ａ，１６ａ間に設けられるとともにアジャストギヤ２３の回動によって伸長し得る収縮位置規制ストラット２４と、前記アジャストギヤ２３に係合する送り爪２５ａを有して第１および第２のブレーキシュー１５，１６のうち第２のブレーキシュー１６の前記第２のウエブ１６ａに回動可能に支持されるアジャストレバー２５と、前記収縮位置規制ストラット２４を伸長させる方向に前記アジャストギヤ２３を回動させる側に前記アジャストレバー２５を回動付勢するアジャストスプリング２６とで構成される。 The braking gap automatic adjusting means 18 is provided between the first and second webs 15a and 16a of the first and second brake shoes 15 and 16, and is a contraction position regulating that can be extended by rotation of the adjusting gear 23. It has a strut 24 and a feed claw 25a that engages with the adjust gear 23, and can rotate to the second web 16a of the second brake shoe 16 of the first and second brake shoes 15 and 16. It is composed of an adjusting lever 25 that is supported and an adjusting spring 26 that rotates and urges the adjusting lever 25 to the side that rotates the adjusting gear 23 in a direction that extends the contraction position regulating strut 24.
　前記収縮位置規制ストラット２４は、第１および第２のブレーキシュー１５，１６の収縮位置を規制するものであり、第１および第２のブレーキシュー１５，１６のうち第１のブレーキシュー１５が備える前記第１のウエブ１５ａの前記他端部寄りに係合する第１係合連結部２７ａを有する第１ロッド２７と、第２のブレーキシュー１６が備える第２のウエブ１６ａの前記他端部寄りに係合する第２係合連結部２８ａを有して第１ロッド２７と同軸に配置される第２ロッド２８と、第１ロッド２７に一端部が軸方向相対移動可能に挿入されるとともに第２ロッド２８に他端部が同軸に螺合されるアジャストボルト２９とを有しており、前記アジャストギヤ２３は、第１および第２ロッド２７，２８間に配置されて前記アジャストボルト２９の外周に形成される。 The contraction position regulating strut 24 regulates the contraction positions of the first and second brake shoes 15 and 16, and the first brake shoe 15 of the first and second brake shoes 15 and 16 includes the first and second brake shoes 15 and 16. A first rod 27 having a first engaging connecting portion 27a that engages with the other end of the first web 15a and a second web 16a provided with the second brake shoe 16 near the other end. A second rod 28 having a second engaging connecting portion 28a that engages with the first rod 27 and arranged coaxially with the first rod 27, and one end of the first rod 27 being inserted into the first rod 27 so as to be relatively movable in the axial direction. The two rods 28 have an adjusting bolt 29 whose other end is coaxially screwed, and the adjusting gear 23 is arranged between the first and second rods 27 and 28 to provide an outer circumference of the adjusting bolt 29. Is formed in.
　第１のウエブ１５ａの前記他端部寄りの前記車軸１１側に臨む側縁には、第１係合連結部２７ａを係合させる第１係止凹部３０が設けられ、また第２のウエブ１６ａの前記他端部寄りの前記車軸１１側に臨む側縁には、第２係合連結部２８ａを係合させる第２係止凹部３１が設けられる。 A first locking recess 30 for engaging the first engaging connecting portion 27a is provided on the side edge of the first web 15a near the other end and facing the axle 11 side, and the second web 16a is provided. A second locking recess 31 for engaging the second engaging connecting portion 28a is provided on the side edge facing the axle 11 side near the other end portion of the above.
　前記アジャストギヤ２３に係合する送り爪２５ａを有するアジャストレバー２５は、前記第２のウエブ１６ａに支軸３２を介して回動可能に支持され、前記第２のウエブ１６ａおよび前記アジャストレバー２５間に前記アジャストスプリング２６が設けられる。しかも前記アジャストスプリング２６のばね力は、前記リターンスプリング１９のばね力よりも小さく設定される。 The adjusting lever 25 having a feed claw 25a that engages with the adjusting gear 23 is rotatably supported by the second web 16a via a support shaft 32, and is rotatably supported between the second web 16a and the adjusting lever 25. Is provided with the adjust spring 26. Moreover, the spring force of the adjust spring 26 is set to be smaller than the spring force of the return spring 19.
　このような制動間隙自動調整手段１８によれば、第１および第２のブレーキシュー１５，１６が前記ホイールシリンダ１７の作動によって拡張作動する際に前記第１および第２のライニング１５ｃ，１６ｃの摩耗に起因して一定値以上拡張した場合には、前記アジャストスプリング２６のばね力によって前記アジャストレバー２５が前記支軸３２の軸線まわりに回動し、それによって前記アジャストギヤ２３が回動するのに応じて前記収縮位置規制ストラット２４の有効長さが増加補正される。 According to the braking gap automatic adjusting means 18, the first and second linings 15c and 16c are worn when the first and second brake shoes 15 and 16 are extended by the operation of the wheel cylinder 17. When the adjustment lever 25 is expanded by a certain value or more due to the above, the adjustment lever 25 is rotated around the axis of the support shaft 32 by the spring force of the adjustment spring 26, whereby the adjustment gear 23 is rotated. The effective length of the contraction position regulating strut 24 is increased and corrected accordingly.
　ところで、このドラムブレーキＢは、作動に応じてパーキングブレーキ力を発生させ得るパーキングブレーキレバー３４を備えており、このパーキングブレーキレバー３４は、第１のブレーキシュー１５における前記第１のウエブ１５ａの一部に、前記ブレーキドラム１４の回転軸線に沿う方向での正面視（図１で示す方向）で重なるように配置され、前記第１のウエブ１５ａの長手方向に沿って長く延びる。 By the way, the drum brake B includes a parking brake lever 34 capable of generating a parking brake force according to the operation, and the parking brake lever 34 is one of the first webs 15a of the first brake shoe 15. The brake drum 14 is arranged so as to overlap with each other in a front view (direction shown in FIG. 1) in a direction along the rotation axis of the brake drum 14, and extends long along the longitudinal direction of the first web 15a.
　前記パーキングブレーキレバー３４の一端部（この実施の形態では下端部）には、ブレーキケーブル３７の一端部に固定された係合駒３６が係合され、前記パーキングブレーキレバー３４の他端部（この実施の形態では上端部）は、第１のブレーキシュー１５における前記第１のウエブ１５ａの他端部にピン３５を介して連結される。 An engaging piece 36 fixed to one end of the brake cable 37 is engaged with one end of the parking brake lever 34 (the lower end in this embodiment), and the other end of the parking brake lever 34 (this). In the embodiment, the upper end portion) is connected to the other end portion of the first web 15a in the first brake shoe 15 via a pin 35.
　車両のパーキングブレーキ作動時には、前記ブレーキケーブル３７から入力される牽引力により、前記パーキングブレーキレバー３４が前記ピン３５を支点として図１の反時計方向に回動、駆動されるものであり、このパーキングブレーキレバー３４の回動によって、第２のブレーキシュー１６に、当該ブレーキシュー１６が有する前記第２のライニング１６ｃを前記ブレーキドラム１４の内周に圧接させる方向の力が前記収縮位置規制ストラット２４を介して作用する。さらに前記パーキングブレーキレバー３４が図１の反時計方向に続けて回動、駆動されると、前記パーキングブレーキレバー３４が前記収縮位置規制ストラット２４の第１係合連結部２７ａとの係合部を支点として回動し、今度は、前記ピン３５を介して第１のブレーキシュー１５が拡張作動し、第１のブレーキシュー１５の前記第１のライニング１５ｃが前記ブレーキドラム１４の内周に圧接することになる。すなわち前記パーキングブレーキレバー３４は、第１および第２のブレーキシュー１５，１６の前記第１および第２のライニング１５ｃ，１６ｃが前記ブレーキドラム１４の内周に圧接するようにした作動位置に作動し、この状態でパーキングブレーキ状態が得られることになる。 When the parking brake of the vehicle is activated, the parking brake lever 34 is rotated and driven in the counterclockwise direction of FIG. 1 with the pin 35 as a fulcrum by the traction force input from the brake cable 37. Due to the rotation of the lever 34, a force in a direction in which the second lining 16c of the brake shoe 16 is pressed against the inner circumference of the brake drum 14 is applied to the second brake shoe 16 via the contraction position regulating strut 24. To work. Further, when the parking brake lever 34 is continuously rotated and driven in the counterclockwise direction of FIG. 1, the parking brake lever 34 engages with the first engaging connecting portion 27a of the contraction position regulating strut 24. It rotates as a fulcrum, and this time, the first brake shoe 15 expands and operates via the pin 35, and the first lining 15c of the first brake shoe 15 presses against the inner circumference of the brake drum 14. It will be. That is, the parking brake lever 34 operates at an operating position where the first and second linings 15c and 16c of the first and second brake shoes 15 and 16 are in pressure contact with the inner circumference of the brake drum 14. , The parking brake state can be obtained in this state.
　また前記ブレーキケーブル３７を緩めることで前記パーキングブレーキレバー３４に対する回動駆動力の付与を停止したときには、前記ブレーキドラム１４の内周から離反する方向に前記リターンスプリング１９のばね力によって作動する第１および第２のブレーキシュー１５，１６とともに前記パーキングブレーキレバー３４は非作動位置に戻ることになり、前記パーキングブレーキレバー３４は非作動位置側に向けて付勢されている。 Further, when the application of the rotational driving force to the parking brake lever 34 is stopped by loosening the brake cable 37, the first operation is performed by the spring force of the return spring 19 in a direction away from the inner circumference of the brake drum 14. The parking brake lever 34 returns to the non-operating position together with the second brake shoes 15 and 16, and the parking brake lever 34 is urged toward the non-operating position side.
　図２を併せて参照して、前記ブレーキケーブル３７は、電動アクチュエータ３８が発揮する動力で牽引されるものであり、この電動アクチュエータ３８は、前記ブレーキケーブル３７に連結されるねじ軸３９と、当該ねじ軸３９をその回転を阻止しつつ軸線方向の往復運動を可能として支持するアクチュエータケース４０と、正逆回転を自在として前記アクチュエータケース４０内に収容される電動モータ４１と、その電動モータ４１で発生する回転運動を前記ねじ軸３９の直線運動に変換することを可能としつつ前記電動モータ４１および前記ねじ軸３９間に介設されて前記アクチュエータケース４０に収容される運動変換機構（図示せず）とを備える。 With reference to FIG. 2, the brake cable 37 is towed by the power exerted by the electric actuator 38, and the electric actuator 38 has a screw shaft 39 connected to the brake cable 37 and the screw shaft 39. An actuator case 40 that supports the screw shaft 39 so as to be able to reciprocate in the axial direction while blocking its rotation, an electric motor 41 that can freely rotate in the forward and reverse directions and is housed in the actuator case 40, and the electric motor 41. A motion conversion mechanism (not shown) interposed between the electric motor 41 and the screw shaft 39 and housed in the actuator case 40 while making it possible to convert the generated rotary motion into the linear motion of the screw shaft 39. ) And.
　この電動アクチュエータ３８の前記アクチュエータケース４０は、前記ホイールシリンダ１７とは反対側で前記バックプレート１３に取付け部材４３を介して取付けられる。前記取付け部材４３は、前記アクチュエータケース４０に固着されており、この取付け部材４３が複数個たとえば３個のボルト４４で前記バックプレート１３に締結される。 The actuator case 40 of the electric actuator 38 is attached to the back plate 13 on the opposite side of the wheel cylinder 17 via the attachment member 43. The mounting member 43 is fixed to the actuator case 40, and the mounting member 43 is fastened to the back plate 13 with a plurality of, for example, three bolts 44.
　前記電動アクチュエータ３８の前記ねじ軸３９は、ケーブルジョイント５１を介して前記ブレーキケーブル３７に連結されており、そのねじ軸３９および前記ブレーキケーブル３７の連結部は、前記アクチュエータケース４０に結合される保護筒５０で覆われる。 The screw shaft 39 of the electric actuator 38 is connected to the brake cable 37 via a cable joint 51, and the screw shaft 39 and the connecting portion of the brake cable 37 are protected to be coupled to the actuator case 40. Covered with a cylinder 50.
　前記バックプレート１３の下部の車両前後方向に沿う前部には筒部１３ａが一体に突設されており、前記ブレーキケーブル３７は、前記筒部１３ａから前記バックプレート１３内に導入される。また前記保護筒５０および前記筒部１３ａ間で前記ブレーキケーブル３７は、鉄製の線材をコイル状に巻回して成るアウターケーブル４５で覆われる。そのアウターケーブル４５の前記電動アクチュエータ３８側の端部は、ガイドチューブ５２を介して前記保護筒５０に取付けられ、前記アウターケーブル４５の前記バックプレート１３側の端部はガイドチューブ５３を介して前記筒部１３ａに取付けられる。 A tubular portion 13a is integrally projected from the lower portion of the back plate 13 along the vehicle front-rear direction, and the brake cable 37 is introduced into the back plate 13 from the tubular portion 13a. Further, the brake cable 37 is covered with an outer cable 45 formed by winding an iron wire rod in a coil shape between the protective cylinder 50 and the cylinder portion 13a. The end of the outer cable 45 on the electric actuator 38 side is attached to the protective cylinder 50 via the guide tube 52, and the end of the outer cable 45 on the back plate 13 side is the end via the guide tube 53. It is attached to the tubular portion 13a.
　また前記第１および第２のウエブ１５ａ，１６ａの一端部間で、前記アンカープレート２１を前記バックプレート１３との間に挟む押さえ板４６が、前記アンカープレート２１とともに一対のリベット４７によって前記バックプレート１３の下部に取付けられ、前記押さえ板４６に、前記アウターケーブル４５とともに前記ブレーキケーブル３７をガイドするガイド部４６ａが、略Ｕ字状の横断面形状を有するようにして一体に設けられる。 Further, between one ends of the first and second webs 15a and 16a, a holding plate 46 sandwiching the anchor plate 21 with the back plate 13 is formed by a pair of rivets 47 together with the anchor plate 21 to form the back plate. A guide portion 46a, which is attached to the lower part of the 13 and guides the brake cable 37 together with the outer cable 45, is integrally provided on the holding plate 46 so as to have a substantially U-shaped cross-sectional shape.
　図３において、前記電動アクチュエータ３８における前記電動モータ４１には、電源６１の電力が駆動回路６２を介して供給されるものであり、パーキングブレーキの作動および解除を切り替える前記電動モータ４１の作動すなわち前記駆動回路６２の作動は制御ユニットＣで制御される。この制御ユニットＣには、運転者が電動アクチュエータ３８の作動によってパーキングブレーキ状態を得るための操作を行なったことを検出してパーキングブレーキ状態を得るための信号を出力する指示手段６３と、車輪速度検出手段６４と、運転者が走行を意図しているか否かを判断するためのアクセル操作量検出手段６５とが接続される。一方、前記制御ユニットＣは、前記車輪速度検出手段６４の検出値に基づいて車両状態を判断する車両状態判断部６６を有しており、当該車両状態判断部６６は、前記車輪速度検出手段６４の検出値が所定値以上であるときに走行中であると判断し、前記車輪速度検出手段６４の検出値が前記所定値未満であるときに停車中であると判断する。 In FIG. 3, the electric power of the power source 61 is supplied to the electric motor 41 of the electric actuator 38 via the drive circuit 62, and the operation of the electric motor 41 for switching the operation and release of the parking brake, that is, the said. The operation of the drive circuit 62 is controlled by the control unit C. The control unit C includes an instruction means 63 that detects that the driver has performed an operation for obtaining the parking brake state by operating the electric actuator 38 and outputs a signal for obtaining the parking brake state, and a wheel speed. The detection means 64 and the accelerator operation amount detecting means 65 for determining whether or not the driver intends to drive are connected. On the other hand, the control unit C has a vehicle state determination unit 66 that determines a vehicle state based on the detection value of the wheel speed detection means 64, and the vehicle state determination unit 66 has the wheel speed detection means 64. When the detected value of is equal to or greater than a predetermined value, it is determined that the vehicle is running, and when the detected value of the wheel speed detecting means 64 is less than the predetermined value, it is determined that the vehicle is stopped.
　ところでパーキングブレーキの作動および解除を切り替える前記電動モータ４１の作動が、電源６１の一時的な電圧低下等によって中断してしまう状態が生じる可能性があり、その様な場合の作動中断後に電動アクチュエータ３８の作動が可能な状態に復帰したときに、前記制御ユニットＣは前記電動アクチュエータ３８を次のように制御する。 By the way, there is a possibility that the operation of the electric motor 41 for switching the operation and release of the parking brake may be interrupted due to a temporary voltage drop of the power supply 61 or the like, and in such a case, the electric actuator 38 may be interrupted after the operation is interrupted. When the control unit C returns to the operable state, the control unit C controls the electric actuator 38 as follows.
　先ず、前記電動アクチュエータ３８の一時的な作動中断が生じた後の作動可能状態への復帰時に前記パーキングブレーキのアプライ制御の途中で前記作動中断が生じたと判断した場合に、前記制御ユニットＣは、その復帰時の前記車両状態判断部６６の判断結果が停車中であったときには前記パーキングブレーキのアプライ制御を再開し、前記復帰時の前記車両状態判断部６６の判断結果が走行中であったときには前記パーキングブレーキのアプライ制御の再開を停止する。 First, when it is determined that the operation interruption has occurred during the apply control of the parking brake at the time of returning to the operable state after the temporary operation interruption of the electric actuator 38 has occurred, the control unit C determines that the operation interruption has occurred. When the determination result of the vehicle state determination unit 66 at the time of return is stopped, the apply control of the parking brake is restarted, and when the determination result of the vehicle state determination unit 66 at the time of return is running. The restart of the application control of the parking brake is stopped.
　すなわち図４で示すように、パーキングブレーキの作動状態を得るための作動要求に応じて電動アクチュエータ３８のアプライ制御を行なっている途中の時刻ｔ１でシステムダウンによる前記電動アクチュエータ３８の作動中断が生じた後に、システムの復帰によって前記電動アクチュエータ３８の作動が可能となった時刻ｔ２で、車両状態が停車中であったときにはその時刻ｔ２で前記電動アクチュエータ３８がパーキングブレーキ状態を得るための作動を再開することになる。 That is, as shown in FIG. 4, the operation of the electric actuator 38 was interrupted due to the system down at time t1 during the application control of the electric actuator 38 in response to the operation request for obtaining the operating state of the parking brake. Later, at time t2 when the electric actuator 38 can be operated by returning the system, when the vehicle state is stopped, the electric actuator 38 resumes the operation for obtaining the parking brake state at that time t2. It will be.
　また図５で示すように、パーキングブレーキの作動状態を得るための作動要求に応じて電動アクチュエータ３８のアプライ制御を行なっている途中の時刻ｔ３でシステムダウンによる前記電動アクチュエータ３８の作動中断が生じた後に、システムの復帰によって前記電動アクチュエータ３８の作動が可能となった時刻ｔ４で、車両状態が走行中であったときには前記電動アクチュエータ３８の作動は停止したままである。 Further, as shown in FIG. 5, the operation of the electric actuator 38 was interrupted due to the system down at time t3 during the application control of the electric actuator 38 in response to the operation request for obtaining the operating state of the parking brake. Later, at time t4 when the electric actuator 38 can be operated by returning the system, the operation of the electric actuator 38 remains stopped when the vehicle state is running.
　この際、上記時刻ｔ４で新たな作動要求があったときには、図６で示すように、前記制御ユニットＣはその作動要求に応じて前記電動アクチュエータ３８の作動を制御し、また上記時刻ｔ４で前記アクセル操作量検出手段６５からの信号入力に応じて運転者が走行を意図していると判断したときには、前記制御ユニットＣは、前記パーキングブレーキのリリース制御を実行する。 At this time, when a new operation request is made at the time t4, as shown in FIG. 6, the control unit C controls the operation of the electric actuator 38 in response to the operation request, and at the time t4, the operation is controlled. When it is determined that the driver intends to travel in response to the signal input from the accelerator operation amount detecting means 65, the control unit C executes the release control of the parking brake.
　また前記電動アクチュエータ３８の一時的な作動中断が生じた後の作動可能状態への復帰時に前記パーキングブレーキのリリース制御の途中で前記作動中断が生じたと判断した場合に、前記制御ユニットＣは、その復帰時の前記車両状態判断部６６の判断結果が走行中であったときには前記パーキングブレーキのリリース制御を再開し、前記車両状態判断部６６の判断結果が停車中であったときには新たな作動要求に応じて前記電動アクチュエータ３８の作動を制御する。 Further, when it is determined that the operation interruption has occurred during the release control of the parking brake at the time of returning to the operable state after the temporary operation interruption of the electric actuator 38 has occurred, the control unit C has the control unit C. When the determination result of the vehicle condition determination unit 66 at the time of return is running, the release control of the parking brake is restarted, and when the determination result of the vehicle condition determination unit 66 is stopped, a new operation request is made. The operation of the electric actuator 38 is controlled accordingly.
　すなわち図７で示すように、パーキングブレーキの作動状態を得るための作動要求に応じて電動アクチュエータ３８のリリース制御を行なっている途中の時刻ｔ５でシステムダウンによる前記電動アクチュエータ３８の作動中断が生じた後に、システムの復帰によって前記電動アクチュエータ３８の作動が可能となった時刻ｔ６で、車両状態が走行中であったときにはその時刻ｔ６で前記パーキングブレーキを解除するように前記電動アクチュエータ３８のリリース制御を再開することになる。また図８で示すように、システムの復帰によって前記電動アクチュエータ３８の作動が可能となった時刻ｔ６で、車両状態が停車中であって新たな作動要求があったときには、その作動要求に応じて前記電動アクチュエータ３８の作動を制御する。 That is, as shown in FIG. 7, the operation of the electric actuator 38 was interrupted due to the system down at time t5 during the release control of the electric actuator 38 in response to the operation request for obtaining the operating state of the parking brake. Later, at time t6 when the electric actuator 38 can be operated by returning the system, release control of the electric actuator 38 is performed so that the parking brake is released at that time t6 when the vehicle state is running. It will resume. Further, as shown in FIG. 8, when the vehicle state is stopped and a new operation request is made at the time t6 when the electric actuator 38 can be operated by the system return, the operation request is received. It controls the operation of the electric actuator 38.
　次にこの実施の形態の作用について説明すると、車輪速度検出手段６４の検出値に基づいて車両状態を判断する車両状態判断部６６を有しつつ電動アクチュエータ３８の作動を制御する制御ユニットＣが、前記電動アクチュエータ３８の一時的な作動中断が生じた後の作動可能状態への復帰時にパーキングブレーキのアプライ制御の途中で前記作動中断が生じたと判断した場合に、その復帰時の前記車両状態判断部６６の判断結果が停車中であったときには前記パーキングブレーキのアプライ制御を再開し、前記復帰時の前記車両状態判断部６６の判断結果が走行中であったときには前記パーキングブレーキのアプライ制御の再開を停止するので、パーキングブレーキのアプライ制御の途中で作動中断が生じたと判断した場合の停車中には未完了であったパーキングブレーキのアプライ制御を直ちに再開することによって停車時のブレーキ効力の不足が生じることを防止することができ、また走行中であるときにはパーキングブレーキのアプライ制御の再開を停止するので運転者の意図に反してブレーキ力がかかってしまうことはない。 Next, the operation of this embodiment will be described. A control unit C that controls the operation of the electric actuator 38 while having the vehicle state determination unit 66 that determines the vehicle state based on the detection value of the wheel speed detecting means 64 When it is determined that the operation interruption has occurred during the application control of the parking brake at the time of returning to the operable state after the temporary operation interruption of the electric actuator 38 has occurred, the vehicle state determination unit at the time of the return is determined. When the determination result of 66 is stopped, the apply control of the parking brake is restarted, and when the determination result of the vehicle state determination unit 66 at the time of return is running, the apply control of the parking brake is restarted. Since the vehicle is stopped, if it is determined that the operation is interrupted during the application control of the parking brake, the braking effect at the time of stopping is insufficient by immediately restarting the application control of the parking brake, which was incomplete during the stop. This can be prevented, and since the restart of the application control of the parking brake is stopped when the vehicle is running, the braking force is not applied against the driver's intention.
　また前記制御ユニットＣは、前記電動アクチュエータ３８の一時的な作動中断が生じた後の作動可能状態への復帰時に、前記パーキングブレーキのアプライ制御の途中で前記作動中断が生じたと判断した場合に、前記車両状態判断部６６の判断結果が走行中であったときには新たな作動要求に応じて前記電動アクチュエータ３８の作動を制御するので運転者の要求に即時に対応することができ、運転者が走行を意図していると判断したときには前記パーキングブレーキのリリース制御を実行するので運転者の意図に即時に対応することができる。 Further, when the control unit C determines that the operation interruption has occurred during the application control of the parking brake at the time of returning to the operable state after the temporary operation interruption of the electric actuator 38 has occurred, the control unit C determines that the operation interruption has occurred. When the determination result of the vehicle state determination unit 66 is running, the operation of the electric actuator 38 is controlled in response to a new operation request, so that the driver's request can be immediately responded and the driver can drive. When it is determined that the intention is intended, the release control of the parking brake is executed, so that the driver's intention can be immediately responded to.
　また前記制御ユニットＣは、前記電動アクチュエータ３８の一時的な作動中断が生じた後の作動可能状態への復帰時に前記パーキングブレーキのリリース制御の途中で前記作動中断が生じたと判断した場合に、その復帰時の前記車両状態判断部６６の判断結果が走行中であったときには前記パーキングブレーキのリリース制御を再開するので、ブレーキの引きずりの発生を防止することができる。 Further, when the control unit C determines that the operation interruption has occurred during the release control of the parking brake at the time of returning to the operable state after the temporary operation interruption of the electric actuator 38 has occurred, the operation interruption thereof is performed. When the determination result of the vehicle state determination unit 66 at the time of return is running, the release control of the parking brake is restarted, so that the occurrence of brake drag can be prevented.
　しかも前記制御ユニットＣは、前記電動アクチュエータ３８の一時的な作動中断が生じた後の作動可能状態への復帰時に、前記パーキングブレーキのリリース制御の途中で前記電動アクチュエータ３８の一時的な作動中断が生じたと判断した場合に、前記車両状態判断部６６の判断結果が停車中であったときには、新たな作動要求に応じて前記電動アクチュエータ３８の作動を制御するので、運転者の要求に即時に対応することができる。 Moreover, when the control unit C returns to the operable state after the temporary operation interruption of the electric actuator 38 occurs, the operation of the electric actuator 38 is temporarily interrupted during the release control of the parking brake. When it is determined that the electric actuator 38 has occurred and the determination result of the vehicle state determination unit 66 is stopped, the operation of the electric actuator 38 is controlled in response to a new operation request, so that the driver's request is immediately responded to. can do.
　またホイールシリンダ１７を備えるドラムブレーキＢに、作動に応じてパーキングブレーキ状態を得るパーキングブレーキレバー３４と、そのパーキングブレーキレバー３４にパーキングブレーキケーブル３７を介して連結される前記電動アクチュエータ３８とが付設されるので、ホイールシリンダ１７を有するドラムブレーキＢに本発明を適用することができる。 Further, the drum brake B provided with the wheel cylinder 17 is provided with a parking brake lever 34 that obtains a parking brake state according to the operation, and the electric actuator 38 that is connected to the parking brake lever 34 via a parking brake cable 37. Therefore, the present invention can be applied to the drum brake B having the wheel cylinder 17.
　さらに前記制御ユニットＣが有する前記車両状態判断部６６は、前記車輪速度検出手段６４の検出値が所定値以上であるときに走行中であると判断し、前記車輪速度検出手段６４の検出値が前記所定値未満であるときに停車中であると判断するので、前記車輪速度検出手段６４の検出値によって車両が走行中であるか、停車中であるかを簡単に判断することができる。 Further, the vehicle state determination unit 66 included in the control unit C determines that the vehicle is running when the detection value of the wheel speed detection means 64 is equal to or higher than a predetermined value, and the detection value of the wheel speed detection means 64 is determined to be running. Since it is determined that the vehicle is stopped when the value is less than the predetermined value, it can be easily determined whether the vehicle is running or stopped based on the detection value of the wheel speed detecting means 64.
　以上、本発明の実施の形態について説明したが、本発明は上記実施の形態に限定されるものではなく、その要旨を逸脱することなく種々の設計変更を行うことが可能である。 Although the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the gist thereof.

Claims (7)

  1. 　パーキングブレーキの作動および解除が電動アクチュエータ（３８）の作動に応じて切り替えられる電動パーキングブレーキ装置において、車輪速度を検出する車輪速度検出手段（６４）と、当該車輪速度検出手段（６４）の検出値に基づいて車両状態を判断する車両状態判断部（６６）を有しつつ前記電動アクチュエータ（３８）の作動を制御する制御ユニット（Ｃ）とを備え、当該制御ユニット（Ｃ）は、前記電動アクチュエータ（３８）の一時的な作動中断が生じた後の作動可能状態への復帰時に前記パーキングブレーキのアプライ制御の途中で前記作動中断が生じたと判断した場合に、その復帰時の前記車両状態判断部（６６）の判断結果が停車中であったときには前記パーキングブレーキのアプライ制御を再開し、前記復帰時の前記車両状態判断部（６６）の判断結果が走行中であったときには前記パーキングブレーキのアプライ制御の再開を停止することを特徴とする電動パーキングブレーキ装置。 In the electric parking brake device in which the operation and release of the parking brake are switched according to the operation of the electric actuator (38), the wheel speed detecting means (64) for detecting the wheel speed and the detection value of the wheel speed detecting means (64). The control unit (C) includes a control unit (C) that controls the operation of the electric actuator (38) while having a vehicle state determination unit (66) that determines the vehicle state based on the above. (38) When it is determined that the operation interruption has occurred during the application control of the parking brake at the time of returning to the operable state after the temporary operation interruption has occurred, the vehicle state determination unit at the time of the return. When the determination result of (66) is stopped, the application control of the parking brake is restarted, and when the determination result of the vehicle state determination unit (66) at the time of return is running, the apply of the parking brake is applied. An electric parking brake device characterized by stopping the resumption of control.
  2. 　パーキングブレーキの作動および解除が電動アクチュエータ（３８）の作動に応じて切り替えられる電動パーキングブレーキ装置において、車輪速度を検出する車輪速度検出手段（６４）と、当該車輪速度検出手段（６４）の検出値に基づいて車両状態を判断する車両状態判断部（６６）を有しつつ前記電動アクチュエータ（３８）の作動を制御する制御ユニット（Ｃ）とを備え、当該制御ユニット（Ｃ）は、前記電動アクチュエータ（３８）の一時的な作動中断が生じた後の作動可能状態への復帰時に前記パーキングブレーキのリリース制御の途中で前記作動中断が生じたと判断した場合に、その復帰時の前記車両状態判断部（６６）の判断結果が走行中であったときには前記パーキングブレーキのリリース制御を再開することを特徴とする電動パーキングブレーキ装置。 In the electric parking brake device in which the operation and release of the parking brake are switched according to the operation of the electric actuator (38), the wheel speed detecting means (64) for detecting the wheel speed and the detection value of the wheel speed detecting means (64). The control unit (C) includes a control unit (C) that controls the operation of the electric actuator (38) while having a vehicle state determination unit (66) that determines the vehicle state based on the above. (38) When it is determined that the operation interruption has occurred during the release control of the parking brake at the time of returning to the operable state after the temporary operation interruption has occurred, the vehicle state determination unit at the time of the return is determined. An electric parking brake device characterized in that the release control of the parking brake is restarted when the determination result of (66) is running.
  3. 　前記制御ユニット（Ｃ）は、前記電動アクチュエータ（３８）の一時的な作動中断が生じた後の作動可能状態への復帰時に、前記パーキングブレーキのアプライ制御の途中で前記作動中断が生じたと判断した場合に、前記車両状態判断部（６６）の判断結果が走行中であったときには新たな作動要求に応じて前記電動アクチュエータ（３８）の作動を制御することを特徴とする請求項１に記載の電動パーキングブレーキ装置。 The control unit (C) determined that the operation interruption occurred during the application control of the parking brake when the electric actuator (38) returned to the operable state after the temporary operation interruption occurred. The first aspect of the present invention, wherein the operation of the electric actuator (38) is controlled in response to a new operation request when the determination result of the vehicle state determination unit (66) is running. Electric parking brake device.
  4. 　前記制御ユニット（Ｃ）は、前記電動アクチュエータ（３８）の一時的な作動中断が生じた後の作動可能状態への復帰時に、前記パーキングブレーキのアプライ制御の途中で前記作動中断が生じたと判断した場合に、前記車両状態判断部（６６）の判断結果が走行中であったときに運転者が走行を意図していると判断したときには、前記パーキングブレーキのリリース制御を実行することを特徴とする請求項１に記載の電動パーキングブレーキ装置。 The control unit (C) determined that the operation interruption occurred during the application control of the parking brake when the electric actuator (38) returned to the operable state after the temporary operation interruption occurred. In this case, when it is determined that the driver intends to drive when the determination result of the vehicle state determination unit (66) is running, the release control of the parking brake is executed. The electric parking brake device according to claim 1.
  5. 　前記制御ユニット（Ｃ）は、前記電動アクチュエータ（３８）の一時的な作動中断が生じた後の作動可能状態への復帰時に、前記パーキングブレーキのリリース制御の途中で前記電動アクチュエータ（３８）の一時的な作動中断が生じたと判断した場合に、前記車両状態判断部（６６）の判断結果が停車中であったときには、新たな作動要求に応じて前記電動アクチュエータ（３８）の作動を制御することを特徴とする請求項２に記載の電動パーキングブレーキ装置。 When the control unit (C) returns to the operable state after the temporary interruption of operation of the electric actuator (38) occurs, the electric actuator (38) is temporarily interrupted during the release control of the parking brake. When it is determined that the operation is interrupted and the determination result of the vehicle state determination unit (66) is stopped, the operation of the electric actuator (38) is controlled in response to a new operation request. The electric parking brake device according to claim 2.
  6. 　一対のブレーキシュー（１５，１６）をブレーキドラム（１４）に摺接させる動力を発揮するホイールシリンダ（１７）を備えるドラムブレーキ（Ｂ）に、作動に応じてパーキングブレーキ状態を得るパーキングブレーキレバー（３４）と、そのパーキングブレーキレバー（３４）にパーキングブレーキケーブル（３７）を介して連結される前記電動アクチュエータ（３８）とが付設されることを特徴とする請求項１～５のいずれか１項に記載の電動パーキングブレーキ装置。 A parking brake lever (B) that obtains a parking brake state according to the operation of a drum brake (B) provided with a wheel cylinder (17) that exerts power to bring a pair of brake shoes (15, 16) into sliding contact with a brake drum (14). 34) and any one of claims 1 to 5, wherein the electric actuator (38) connected to the parking brake lever (34) via a parking brake cable (37) is attached. The electric parking brake device described in.
  7. 　前記車両状態判断部（６６）は、前記車輪速度検出手段（６４）の検出値が所定値以上であるときに走行中であると判断し、前記車輪速度検出手段（６４）の検出値が前記所定値未満であるときに停車中であると判断することを特徴とする請求項１～６のいずれか１項に記載の電動パーキングブレーキ装置。
          The vehicle state determination unit (66) determines that the vehicle is running when the detection value of the wheel speed detection means (64) is equal to or higher than a predetermined value, and the detection value of the wheel speed detection means (64) is the said. The electric parking brake device according to any one of claims 1 to 6, wherein it is determined that the vehicle is stopped when the value is less than a predetermined value.
PCT/JP2020/047376 2020-03-26 2020-12-18 Electric parking brake device WO2021192457A1 (en)

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Publication number Priority date Publication date Assignee Title
JP4466582B2 (en) * 2006-02-17 2010-05-26 トヨタ自動車株式会社 Electric parking brake device
JP6297883B2 (en) * 2014-03-28 2018-03-20 マツダ株式会社 Electric brake device
JP2019130938A (en) * 2018-01-29 2019-08-08 日立オートモティブシステムズ株式会社 Electric brake device and electric brake controller

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