WO2022249014A1 - Dispositif de réduction de pulsation et dispositif de régulation de pression de fluide de frein de véhicule comprenant ledit dispositif de réduction de pulsation - Google Patents

Dispositif de réduction de pulsation et dispositif de régulation de pression de fluide de frein de véhicule comprenant ledit dispositif de réduction de pulsation Download PDF

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Publication number
WO2022249014A1
WO2022249014A1 PCT/IB2022/054780 IB2022054780W WO2022249014A1 WO 2022249014 A1 WO2022249014 A1 WO 2022249014A1 IB 2022054780 W IB2022054780 W IB 2022054780W WO 2022249014 A1 WO2022249014 A1 WO 2022249014A1
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WO
WIPO (PCT)
Prior art keywords
chamber
brake fluid
fluid pressure
brake
pump
Prior art date
Application number
PCT/IB2022/054780
Other languages
English (en)
Japanese (ja)
Inventor
坂本貴紀
Original Assignee
ロベルト·ボッシュ·ゲゼルシャフト·ミト•ベシュレンクテル·ハフツング
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
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Application filed by ロベルト·ボッシュ·ゲゼルシャフト·ミト•ベシュレンクテル·ハフツング filed Critical ロベルト·ボッシュ·ゲゼルシャフト·ミト•ベシュレンクテル·ハフツング
Priority to JP2023523697A priority Critical patent/JP7546161B2/ja
Publication of WO2022249014A1 publication Critical patent/WO2022249014A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • 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
    • B60T8/40—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 comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/4068—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 comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system the additional fluid circuit comprising means for attenuating pressure pulsations
    • 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
    • B60T17/221—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems

Definitions

  • the present invention relates to a pulsation reduction device for reducing pulsation of brake hydraulic pressure in a brake hydraulic circuit of a vehicle, and a brake hydraulic pressure control device for a vehicle provided with the pulsation reduction device.
  • a brake fluid pressure control device for controlling the brake fluid pressure of a brake system in a vehicle
  • a brake fluid pressure circuit that connects the brake fluid pressure between the master cylinder and the wheel cylinder of the vehicle, It is equipped with a pump for increasing the brake fluid pressure in the brake fluid pressure circuit and a solenoid valve or the like for connecting and disconnecting the brake fluid pressure in the brake fluid pressure circuit.
  • the configuration is such that, when it becomes necessary to increase the brake fluid pressure, the pump is driven and controlled to increase the brake fluid pressure supplied to the wheel cylinder regardless of the state of operation of the brake pedal of the vehicle by the driver. (For example, see Patent Document 1, etc.).
  • Patent Document 1 Japanese Unexamined Patent Application Publication No. 2017-061246
  • the pulsation of the brake fluid pressure generated by driving the pump propagates from the brake system to the engine room of the vehicle, etc., causing the vehicle to malfunction.
  • the brake fluid pressure control device has a volume chamber having a variable volume by having a diaphragm that elastically deforms with changes in the brake fluid pressure, and the pulsation of the brake fluid pressure accompanying the driving of the pump is suppressed. can be reduced.
  • the pulsation of the brake fluid pressure may increase due to the pump being controlled at a higher rotational speed, etc., so it is necessary to further reduce the pulsation of the brake fluid pressure. Desired.
  • An object of the present invention is to provide a hydraulic control device.
  • a pulsation reducing device comprises a brake hydraulic circuit (2) that supplies brake hydraulic pressure to a wheel cylinder (12), a pump (60) that boosts the brake hydraulic pressure, and A pulsation reduction device (37, 80) provided in a vehicle brake system comprising a brake hydraulic circuit (2) for reducing pulsation of the brake hydraulic pressure in the brake hydraulic circuit (2), wherein the brake hydraulic circuit ( 2) a first chamber (in) to which brake fluid pressure is input from; a second chamber (6) connected to the first chamber (in); a third chamber that outputs brake hydraulic pressure to the brake hydraulic circuit (2); a first connection portion that connects the first chamber (in) and the second chamber (6); ) and the third chamber (O), and a second connection portion connecting the first valve seat
  • the second chamber (:6) includes a connection position connecting the chamber (:6) and the third chamber (O) and the second valve body ( 9413 ) that moves to the second chamber (:6). : 6) Elastic member (90 ).
  • the elastic member (90) included in the second chamber (:6) allows the first valve body (87) and the second valve body (9413) to It is possible to absorb abrupt pressure fluctuations accompanying operation and reduce pulsation of the brake hydraulic pressure in the brake hydraulic circuit of the vehicle.
  • the present invention may have only the matters specifying the invention stated in the claims of the present invention, and the matters specifying the invention together with the matters specifying the invention stated in the claims of the present invention It may have a structure other than the matters.
  • FIG. 1 is a diagram for explaining the configuration of a brake system according to an embodiment
  • the brake system 1 and the brake hydraulic pressure control device 50 of the present embodiment are configured to be mounted on a four-wheeled vehicle as a vehicle.
  • the brake system provided with the device may be configured to be mounted on vehicles other than four-wheeled vehicles, such as unicycles, two-wheeled vehicles, tricycles, trucks, buses, construction vehicles, and the like.
  • FIG. 1 A brake system 1 according to this embodiment will be described with reference to FIGS. 1 and 2.
  • FIG. The brake system 1 is a system that controls the braking of each wheel of the four-wheeled vehicle that is the vehicle 100 .
  • the brake system 1 includes a master cylinder 11 having a built-in piston (not shown) that reciprocates in conjunction with a brake pedal 16 provided in a vehicle. , a wheel cylinder 12 provided corresponding to each wheel of a four-wheeled vehicle to generate a braking force of each wheel, and a brake hydraulic pressure supplied to each wheel cylinder 12 to determine the state of brake operation by the driver of the vehicle. and a brake fluid pressure control device 50 that controls independently from.
  • a booster 17 is interposed between the brake pedal 16 and the piston of the master cylinder 11, and the driver's power transmitted to the brake pedal 16 The pedaling force is amplified and transmitted to the piston of master cylinder 11 .
  • Wheel cylinder 12 is provided in brake caliper 18 .
  • the brake ⁇ 02022/249014 ⁇ (:1' 2022/054780 Brake pad 19 of brake caliper 18 is pressed against rotor 20 to brake the wheel.
  • the brake fluid pressure control device 5 0 includes a base body 5 1 formed with a brake fluid hydraulic circuit 2 that connects the brake fluid pressure between the master cylinder 1 1 and the wheel cylinder 1 2 . . Inside the base body 51, there are a main flow path 13 for communicating the master cylinder 11 and the wheel cylinder 12, a sub flow path 14 for releasing the brake fluid in the main flow path 13, and a brake fluid in the sub flow path 14. and a hydraulic circuit 2 including a supply channel 15 for supplying brake fluid, and the hydraulic circuit 2 is filled with brake fluid.
  • the brake system 1 includes two systems of hydraulic circuits 2 & 213 as the hydraulic circuit 2 .
  • the hydraulic circuit 2 & is a hydraulic circuit that communicates the master cylinder 1 1 and the F-scale wheel cylinder 1 2 via the main flow path 1 3 .
  • the hydraulic circuit 213 is a hydraulic circuit that communicates the master cylinder 11 with the wheel F and the lengthy wheel cylinder 12 through the main flow path 13. These hydraulic circuits 2 &, 213 have the same configuration except that the wheel cylinder 12 that communicates with them is different.
  • the upstream end of the sub-flow path 14 is connected to the middle part 13& of the main flow path 13, and the downstream end of the sub-flow path 14 is connected to the middle of the main flow path 13. It is connected to part 1 3 13. Further, the upstream end of the supply channel 15 communicates with the master cylinder 11, and the downstream end of the supply channel 15 is connected to the middle portion 14& of the sub-channel 14. .
  • the upstream side of the sub-flow path 14 refers to the upstream side of the brake fluid flow when the pump is driven and the brake fluid is returned from the wheel cylinder to the master cylinder.
  • the downstream side refers to the downstream side in the flow of the brake fluid.
  • a valve ( ) 31 In the main flow path 13, the area between the middle portion 13 and the middle portion 13 & A valve ( ) 31 is provided.
  • a loosening valve (in-V) 32 is provided in a region between the middle portion 13& and the middle portion 14& of the sub-channel 14.
  • An accumulator 33 is provided in the area between the release valve 32 and the middle portion 14& of the sub-channel 14.
  • the inlet valve 31 is, for example, an electromagnetic valve that opens in a non-energized state and closes in an energized state.
  • the loosening valve 32 is, for example, an electromagnetic valve that closes in a non-energized state and opens in an energized state.
  • a pump 60 is provided in the region between the middle part 14& and the middle part 1313.
  • the suction side of the pump 60 communicates with the middle portion 14 &
  • the discharge side of the pump 60 communicates with the middle portion 13 13 of the secondary flow path 14.
  • 1 includes an intake channel 142 and a discharge channel 140, which are part of the secondary channel 14, as components of a brake fluid pressure control device 50.
  • the intake channel 142 is composed of: A flow path is formed between the middle portion 13 & of the sub-flow path 14 and the suction side of the pump 60, and the discharge flow path 140 is between the discharge side of the pump 60 and the sub-flow path 14. It constitutes the flow path between the central part 1 3 13 .
  • the brake fluid pressure control device 50 is provided with a pulsation reduction section 80 that attenuates the pulsation of the brake fluid discharged from the pump 60 onto the discharge flow path 140.
  • the discharge side of the pump 60 is connected to the inflow opening 91 (see FIG. 2) into which the brake fluid of the pulsation reduction section 80 flows, and the brake fluid temporarily stored in the pulsation reduction section 80 is discharged.
  • the outflow opening 910 through which the fluid flows out is connected to the middle portion 1313 of the sub-channel.
  • the flow path forming between the discharge side of the pump and the inflow opening 9113 will be referred to as the first discharge flow path 140 & , the outflow opening 910 and the middle portion 1 of the secondary flow path. 3 13 may be called a second discharge flow path 1 4 0 13 .
  • a first switching valve () 35 is provided in a region on the master cylinder 11 side with respect to the middle portion 13 of the main flow passage 13.
  • the supply channel 15 has a second switching valve 36, a damper unit 37, and are provided.
  • the damper unit 37 is provided in the region between the second switching valve 36 and the middle portion 1313 in the supply channel 15 .
  • the first switching valve 35 is, for example, an electromagnetic valve that opens in a non-energized state and closes in an energized state.
  • the second switching valve 36 is, for example, an electromagnetic valve that closes in a non-energized state and opens in an energized state.
  • both the discharge channel 140 and the supply channel 15 are provided with the damper unit 37 and the pulsation reduction section 80 as pulsation reduction devices.
  • the damper unit 37 may not be provided depending on the required pulsation damping characteristics.
  • Each member (load valve 31, release valve 32, accumulator 33, pump 60, first switching valve 35, second switching valve 36, damper unit 37 and pulsation reduction section 80) is It may be provided collectively on one base 51, or may be provided separately on a plurality of bases 51.
  • the base body 51 each member provided on the base body 51, the controller 52, and the brake fluid pressure control device 5 0.
  • the operation of the charge valve 31, the release valve 32, the pump 60, the first switching valve 35, and the second switching valve 36 is controlled by the controller 5
  • the hydraulic pressure of the brake fluid in the wheel cylinder 1 2 is controlled by being controlled by 2. That is, the controller 5 2 includes an inlet valve 3 1, a release valve 3 2, a pump 60, a first switching valve 35, and the operation of the second switching valve 36.
  • the controller 52 may be one, or may be divided into a plurality. Also, the controller 52 may be attached to the base 51, or may be attached to another member. In addition, part or all of the controller 52 may be composed of, for example, a microcomputer, a microprocessor unit, etc., or may be composed of an updatable item such as firmware, etc. It may be a program module or the like that is executed by a command from.
  • the controller 52 performs, for example, the following hydraulic pressure control actions in addition to the well-known hydraulic pressure control actions (input: 63 control action, control action, etc.).
  • the controller 5 2 keeps the inlet valve 3 1 in an open state, thereby allowing brake flow from the middle portion 1 3 of the main flow path 1 3 to the wheel cylinder 1 2. Allows fluid flow.
  • the controller 52 also limits the flow of brake fluid from the wheel cylinder 12 to the accumulator 33 by keeping the release valve 32 closed.
  • the controller 52 closes the first switching valve 35 so that the brake fluid in the flow path from the master cylinder 11 to the middle portion 1313 of the main flow path 13 without passing through the pump 60. restrict the flow of
  • the controller 52 opens the second switching valve 36 to reduce the flow of brake fluid in the flow path from the master cylinder 11 to the middle portion 1313 of the main flow path 13 via the pump 60. allow flow.
  • the controller 52 also drives the pump 60 to raise (increase) the hydraulic pressure of the brake fluid in the wheel cylinder 12.
  • the controller 52 opens the first switching valve 35, By closing the second switching valve 36 and stopping the driving of the pump 60, the active pressure increase control operation is terminated.
  • the pulsation generated in the brake fluid may be transmitted to the wheel cylinder 12 through the sub-channel 14 and the main channel 13. be.
  • this pulsation may also be transmitted to the engine room in which the brake fluid pressure control device 50 of the brake system 1 is housed, causing noise. This noise may become loud enough to make the driver feel uncomfortable. Therefore, it is important to reduce the pulsation that occurs when the pump 60 is driven.
  • the brake fluid pressure control device 50 of the brake system 1 of this embodiment can reduce the pulsation that occurs when the pump 60 is driven.
  • the brake fluid pressure control device 50 of this embodiment preferably includes the damper unit 37 as shown in FIG.
  • the damper unit 37 can reduce the pulsation of the brake fluid that propagates from the pump 60 to the brake pedal 16.
  • the damper unit 37 when the damper unit 37 is provided in the brake system 1 in which the booster 17 is omitted, the damper unit 37 is located at the upstream end of the supply passage 15. It may be provided in a region between the part and the second switching valve 36. By providing the damper unit 37 at such a position, when the user depresses and operates the brake pedal 16, the brake fluid can flow into the damper unit 37, and the hydraulic pressure transmitted to the brake pedal 16 is increased. The reaction force of the brake fluid in circuit 2 is reduced. Therefore, when the user operates the brake pedal, an operation amount of the brake pedal 16 similar to that of the brake system 1 having the booster 17 can be obtained. For this reason ⁇ 0 2022/249014 ⁇ (:1' 2022/054780
  • the user can obtain the same feeling of use in the brake system 1 in which the booster 17 is omitted as in the brake system 1 provided with the booster 17.
  • FIG. 2 shows the pump 60 and the pulsation reduction unit 80 mounted on the base body 51 of the brake fluid pressure control device 50, and the drive shaft 57 for driving the piston 62 of the pump 60 removed.
  • FIG. 4 is a partial cross-sectional view of the substrate 51 in a state; The two-dot chain line in FIG. 2 indicates the drive shaft 57 and the eccentric portion 57& formed on the drive shaft 57.
  • the base body 51 is formed with a housing chamber 59 in which a drive shaft 57 for driving the piston 62 of the pump 60 is provided.
  • the accommodation chamber 59 is a bottomed hole formed in the outer wall of the base 51.
  • the base body 51 is formed with a housing chamber 53 for housing the pump 60 .
  • These storage chambers 53 are stepped through holes penetrating from the outer wall of the base body 51 to the storage chamber 59 .
  • the pump 60 housed in the housing chamber 53 includes a cylinder 61, a piston 62 and the like.
  • Cylinder 61 is formed in a bottomed cylindrical shape having bottom 6113 .
  • One end side of a piston 62 is housed in the cylinder 61 .
  • a space surrounded by the inner peripheral surface of the cylinder 61 and the one end of the piston 62 becomes the pump chamber 63 .
  • the piston 62 can freely reciprocate in the axial direction of the cylinder 61 .
  • the end portion 62& which is the other end portion of the piston 62, protrudes into the housing chamber 59.
  • an annular seal member 66 is attached to the portion of the piston 62 that is housed in the cylinder 61. This seal member 66 prevents brake fluid from leaking between the outer peripheral surface of the piston 62 and the inner peripheral surface of the cylinder 61 .
  • a spring 67 is housed between the bottom 6113 and the piston 62, that is, in the pump chamber 63. This spring 67 always urges the piston 62 toward the storage chamber 59 side. As a result, the end portion 62 & of the piston 62 is in contact with the eccentric portion 57 & formed on the drive shaft 57 within the accommodation chamber 59 . The center position of the eccentric portion 57& is eccentric with respect to the center of rotation of the drive shaft 57. Therefore, when the drive shaft 57 is rotated by a drive source (not shown), the eccentric portion 57 & rotates eccentrically with respect to the center of rotation of the drive shaft 57 .
  • a portion of the piston 62 protruding from the cylinder 61 is slidably guided by a guide member 68 provided on the inner peripheral surface of the housing chamber 53.
  • An annular seal member 69 is attached adjacent to the guide member 68 in the storage chamber 53 . This sealing member 69 seals the outflow from the outer peripheral surface of the piston 62 in a liquid-tight manner.
  • the piston 62 is axially formed with a bottomed hole 62 that opens toward the pump chamber 63 side of the cylinder 61.
  • the piston 62 is also formed with an intake port 620 which is a through hole communicating between its outer peripheral surface and the bottomed hole 6213.
  • the piston 62 is provided with a suction valve (not shown) for freely opening and closing the opening of the bottomed hole 6213 .
  • This suction valve includes a ball valve that closes the opening of the bottomed hole 6213, and a panel that biases the ball valve from the cylinder 61 side.
  • a cylindrical filter 70 is attached so as to cover the opening.
  • the bottom 61 of the cylinder 61 is formed with a through hole 610 that communicates the pump chamber 63 with the outside of the cylinder 61.
  • a discharge valve 64 is provided on the opening side opposite to the pump chamber 63 in the through hole 610.
  • the discharge valve 64 includes a ball valve 64 &, a valve seat 6413 formed around the opening edge of the through-hole 610 and on which the ball valve 64a can be attached and detached, and the ball valve 64a.
  • the cover 65 is attached to the bottom 61 of the cylinder 61, for example, by press fitting.
  • the cover 65 is formed with a bottomed hole 65 & having an opening at a position facing the through hole 610 of the bottom 61 .
  • the spring 640 of the discharge valve 64 is accommodated in the bottomed hole 65 & .
  • the inner diameter of the bottomed hole 65& is larger than the outer diameter of the ball valve 64&. Therefore, when the ball valve 64& is separated from the valve seat 6413, the ball valve 64& moves into the bottomed hole 65 & .
  • the ball valve 64& is separated from the valve seat 6413, and the pump chamber 63 and the bottomed hole 65& of the cover 65 form the through hole 61. to communicate with each other. Then, the brake fluid in the pump chamber 63 flows into the bottomed hole 65&.
  • the cover 65 is formed with a groove as a discharge port 6513 that communicates the outside of the cover 65 with the bottomed hole 65&.
  • the brake fluid that has flowed into the bottomed hole 65& of the cover 65 is discharged from the discharge port 6513 to the outside of the cover 65, that is, the outside of the pump 60 (for example, a flow path leading to the pulsation reducing section 80). is discharged to ⁇ 0 2022/249014 ⁇ (:1' 2022/054780
  • the pump 60 configured in this manner is housed in the housing chamber 53 formed in the base 51 as described above. Specifically, in a state in which the annular protrusion 61& formed on the outer peripheral portion of the cylinder 61 is in contact with the stepped portion 53 & of the accommodation chamber 53, the opening of the accommodation chamber 53 The pump 60 is fixed in the housing chamber 53 of the base 51 by caulking.
  • the discharge port 6 of the pump 60 is positioned between the outer peripheral surface of the pump 60 and the inner peripheral surface of the housing chamber 53.
  • a discharge chamber 54 which is a space communicating with 5, is formed. That is, the discharge chamber 54 is an annular space formed on the outer peripheral side of the pump 60 so as to communicate with the discharge port 6513 of the pump 60 .
  • the discharge chamber 54 constitutes a part of the first discharge channel 140 & as described later.
  • the space between the annular projection 61 & of the cylinder 61 and the cover 65 is partitioned into two spaces by the partition 71.
  • a space on the cover 65 side of the partition portion 71 serves as the discharge chamber 54 .
  • the space on the protruding portion 6 1 & side of the partition portion 7 1 serves as an annular flow path 5 5 .
  • the partition portion 71 is composed of a projecting portion annularly projecting from the outer peripheral surface of the cylinder 61 and a ring provided on the projecting portion. ing.
  • the configuration of the partition 71 is arbitrary.
  • the partitioning portion 71 may be configured only by a projecting portion annularly projecting from the outer peripheral surface of the cylinder 61 .
  • the partition portion 71 may be configured only by the O-ring provided on the outer peripheral surface of the cylinder 61.
  • the pump 60 when the pump 60 is accommodated in the accommodation chamber 53, the pump An annular channel 56, which is a space that communicates with the suction port 620 of 60, is formed. That is, the annular flow path 56 is a space formed annularly on the outer peripheral side of the pump 60 so as to communicate with the suction port 620 of the pump 60.
  • the annular channel 56 is formed between the annular protrusion 61 & of the cylinder 61 and the seal member 69 .
  • the annular flow path 56 is formed on the outer peripheral side of the filter 70 provided so as to cover the opening of the suction port 620.
  • the annular flow path 56 communicates with the middle portion 14 & of the sub-flow path 14 in FIG.
  • the annular channel 56 constitutes a part of the secondary channel 14.
  • the discharge chamber 54 formed on the outer peripheral surface side of the pump 60 is connected to the first discharge flow path 140& which forms a part of the discharge flow path 140. It is connected.
  • the housing chamber 58 is a housing chamber for housing the pulsation reducing section 80, and is a bottomed hole formed in the outer wall of the base body 51.
  • the discharge chamber 54 is connected to the inflow opening 91 of the pulsation reducing section 80 via the first discharge channel 140&. In the figure, it is configured such that the brake fluid flows in from the lateral direction with respect to the axis of the housing chamber 58 of the pulsation reducing section 80 .
  • the outflow opening 910 located at the bottom of the storage chamber 58 is connected to the second discharge channel 14013.
  • the second discharge channel 14013 communicates with the middle portion 13 of the main channel 13 in FIG.
  • FIG. 1 A pulsation reduction device according to this embodiment will be described with reference to FIGS. 3 to 6.
  • FIG. The configuration of the pulsation reduction device described later will be described using an example of application to the pulsation reduction section 80, but the configuration may be applied to both the damper unit 37 and the pulsation reduction section 80. However, it may be applied to only one of the damper unit 37 and the pulsation reduction section 80.
  • the brake hydraulic circuit 2 includes the damper unit 37 and the pulsation reduction section 80 as the pulsation reduction device. A configuration including only 80 is also acceptable.
  • the damper unit 37 and the pulsation reduction section 80 may be collectively referred to as a pulsation reduction device.
  • the base body 51 of the brake fluid pressure control device 50 has a pulsation reducing portion 80 formed by a cylindrical hole drilled along the axis XI.
  • the accommodation chamber 58 includes a large diameter portion 58& formed on the outer peripheral surface side of the base 51, and a smaller diameter than the large diameter portion 58& and an interior of the base 51 from the large diameter portion 58&. a reduced diameter portion 58 formed on the side;
  • the large diameter portion 58& and the small diameter portion 5813 are drilled with the axis line X1 as a common central axis.
  • a closing member 81 closes the opening 58 1 of the storage chamber 58 leading to the outer peripheral surface of the base 51 .
  • the accommodation chamber 58 comprises a first partition member 82 comprising a disk portion 82a having an outer diameter approximately equal to the inner diameter of the large diameter portion 58 & and an inner diameter approximately equal to the small diameter portion 58.
  • a second partition member 83 comprising a disk portion 83 & of outer diameter.
  • the first partition member 82 is fitted inside the large-diameter portion 58 & along the inner peripheral surface of the large-diameter portion 58& on the small-diameter portion 5813 side of the inflow opening 9113.
  • second partition member ⁇ 0 2022/249014 ⁇ (:1' 2022/054780
  • the first partition member 82 is fitted and arranged inside the storage chamber 58, so that the closing member 81, the inner peripheral surface of the large diameter portion 58&, the first partition A first chamber compartment defined by member 82 is formed within storage chamber 58 .
  • the first partition member 82 and the second partition member 83 are fitted and arranged inside the storage chamber 58, the first partition member 82 and the inner peripheral surface of the small diameter portion 5813 are separated from each other.
  • a second partition member 83 and a second chamber 6 is formed in the accommodation chamber 58.
  • the second partition member 83 is fitted and arranged inside the storage chamber 58, so that the second partition member 83 and the small diameter portion
  • the third chamber is formed in the containment chamber 58, which is divided by
  • an inflow opening 91 into which the brake fluid 1 that is compressed by the pump 60 and discharged from the discharge port 65 flows. , the brake fluid pressure is input from the pump 60 to the first chamber input.
  • the bottom surface 580 of the small diameter portion 5813 is provided with an outflow opening 910 that communicates with the main flow path 13 and allows the brake fluid F2 to flow out from the pulsation reduction section 80 to the main flow path 13. , so that the brake fluid pressure in the third chamber (:) is output to the main passage 13.
  • the first partition member 82 is formed on the disk portion 82& and the outer edge portion of the disk portion 82&, and the first partition member 82 is fitted into the large diameter portion 58&.
  • a rim portion 8213 extending in the direction of the opening 581 of the housing chamber 58 along the inner peripheral surface of the large diameter portion 58& in a closed state, and a central portion of the disk portion 82a.
  • the first partition member 82 is fitted in the large-diameter portion 58 & and extends to protrude along the axis X1 in the direction of the opening 581 of the storage chamber 58.
  • a communication hole 821 communicates from the entrance side of the first chamber to the side of the second chamber 6, that is, from the side of the large diameter portion 58 & to the side of the small diameter portion 5813 when fitted into the chamber.
  • At least one communication hole 82 1 is formed in a region between the edge 82 and the projecting portion 82 0 .
  • the first partition member 82 may have one communication hole 82 ⁇ 1, or may have a plurality of communication holes 82 ⁇ 1.
  • the second partition member 83 is formed on the disk portion 83& and the outer edge portion of the disk portion 83&, and the second partition member 83 is fitted into the small diameter portion 5813.
  • the second partition member 83 is formed in the central portion of the disk portion 83 & the edge portion 8313 extending along the inner peripheral surface of the small diameter portion 5813 in a state of being folded.
  • Chamber 2 From the 6th side to the 3rd chamber (: side, that is, large diameter part 5 8 & side and small diameter part 5 8 ⁇ 0 2022/249014 ⁇ (: 1' 2022/054780 Communicating hole 830 communicating with the bottom 58 side, and the third chamber of the communicating hole 83 (: side, that is, the bottom 58 of the small diameter part 58 A second valve seat 83 ⁇ 1 formed on the ⁇ side and seated on and off a second valve body 94 described later, and a disk portion 83 in a state where the second partition member 83 is fitted in the small diameter portion 58.
  • 2nd chamber of & 6th side, ie, annular groove 836 formed in edge portion of large diameter portion 58&side;
  • the first partition member 82 is provided with the communication hole 82 ⁇ 1, so that the first chamber inlet and the second chamber: 6 are connected, and the second partition member 83 is provided with a communication hole 830 to connect the 2nd chamber 8 and the 3rd chamber. (: are connected to each other, the brake fluid that has flowed into the first chamber from the inflow opening 9113 passes through the second and third chambers (: and outflows from the outflow opening 910 It is designed to be
  • a disk-shaped disk with an outer diameter approximately equal to the inner diameter of the large diameter portion 58 & moves in the direction of the axis X1.
  • a sealing member 85 is arranged on the outer peripheral surface of the first moving body 84, and the sealing member 85 is interposed to form a smaller diameter portion 5813 than the inflow opening 9113. side slides along the inner peripheral surface of the large diameter portion 58 & in the direction of the axis line insertion X1.
  • tip F can be adopted in order to make the sliding smooth.
  • the outer peripheral surface of the first moving body 84 and the inner peripheral surface of the large diameter portion 58 & are sealed by the sealing member 85, so that the first moving body 8 enters the first chamber. 4 and the sealing member 85 partitioned into two areas, the first movement facing the inner peripheral surface of the large diameter portion 58&, one end surface of the closing member 81, and one end surface of the closing member 81 A first region 1 defined by one end surface of the body 84 is formed, and the inner peripheral surface of the large diameter portion 58 &, one end surface of the first moving body 84, and the first moving body A second region 2 defined by one end face of the first partition member 82 facing the one end face 84 is formed.
  • the volume of the first area input 1 is reduced and the volume of the second area input 2 is expanded, while the first moving body 84 is First partition member 8 Move to 2 side ⁇ 02022/249014 ⁇ (: 1' 2022/054780) By doing so, the first area input 1 is expanded and the second area input 2 is reduced.
  • first moving body 84 there is a communication path from the first area input 1 side to the second area input 2 side, that is, from the closing member 81 side to the first partition member 82 side. Holes 8 4 & are provided.
  • a first valve seat 84 that is seated on and separated from a first valve body 87 is formed at the end of the communication hole 84 & on the first region entry side.
  • the first valve seat 8413 is surrounded by a surrounding member 88 together with the first valve body 87 .
  • the surrounding member 88 is fixed to the first moving body 84 .
  • the peripheral surface of the surrounding member 88 is provided with a communication hole 88& which communicates from the inner side of the surrounding member 88 to the outer side, and as described later, brake fluid pressure is input from the inflow opening 91. reaches the first valve seat 84 through the communication hole 88&. At least one communicating hole 88 & is formed on the peripheral surface of the surrounding member 88 . Note that the surrounding member 88 may have one communication hole 88&, or may have a plurality of communication holes 88&.
  • the first biasing member 86 is an elastomer spring made of a resin material such as silicon
  • the second biasing member 89 is made of a metal material. It is a coiled elastic body. In a state where the first moving body 84 is urged by the first urging member 86 and the second urging member 89 and the first valve seat 84 is seated on the first valve body 87, the Brake fluid pressure is not transmitted from the 1st zone input 1 in the 1st compartment to the 2nd zone input 2 (see Fig. 3).
  • first valve body 87 moves against the urging forces of first urging member 86 and second urging member 89, and the brake fluid pressure exceeds a predetermined first pressure value, so that the first valve seat
  • the first valve body 87 is released from 8413, and the brake fluid pressure is transmitted from the first area input 1 of the first chamber input to the second area input 2 (Fig. 4 reference) .
  • Second chamber: 6 that is, in the small diameter portion 58 13, the inside of the area on the side of the large diameter portion 58 & which is partitioned by the second partition member 83 contains silicon etc. as described later. It is an elastomer spring formed in a ring shape from a resin material, and an elastic member 90 having an outer diameter approximately equal to the inner diameter of the small diameter portion 58 is arranged. The elastic member 90 is positioned by being fitted into the groove 836 of the second partition member 83 .
  • the volume of the elastic member 90 is reduced as the brake fluid pressure in the second chamber: 6 increases, and the volume of the elastic member 90 decreases in the second chamber: 6.
  • the volume in which the brake fluid is accommodated is enlarged.
  • the brake fluid pressure in the second chamber 8 decreases, the volume of the elastic member 90 expands, and the volume of the brake fluid in the second chamber 6 decreases.
  • the second moving body 94 includes a disc portion 94& and a second valve seat 83 ⁇ 1 of a second partition member 83 on the second chamber: 6 side of the disc portion 94a. and a second valve body 94 protruding from the disk portion 94a toward the second chamber 6 side along the axis line X1 so that the second valve body 94 is seated on the second valve seat 83.
  • the disk portion 94& of the second moving body 94 abuts against the third biasing member 92 from the bottom surface 58 side of the small diameter portion 5813. Also, the contact portion 946 of the second moving body 94 contacts the fourth biasing member 93 from the bottom surface 580 side of the small diameter portion 58 . Therefore, the second moving body 94 is urged toward the second chamber 6 by the third urging member 92 and the fourth urging member 93 .
  • the side peripheral surface of the first edge portion 94 ⁇ 1 of the second moving body 94 is such that the second valve body 9413 is seated on and separated from the second valve seat 83 ⁇ 1.
  • a communication hole 94 ⁇ is provided that communicates from the outer peripheral surface side to the inner peripheral surface side when it is in the state of being held.
  • At least one communicating hole 94 ⁇ is formed in the first edge 94 ⁇ 1 .
  • the first edge portion 94 may be configured to have one communication hole 94 ⁇ or may have a plurality of communication holes 94 ⁇ .
  • the third biasing member 92 is a coil-shaped elastic body made of a metal material
  • the fourth biasing member 93 is made of a resin material such as silicon as described later. is a formed elastomer spring
  • the fourth biasing member 93 is formed in a ring shape, and the fourth biasing member 93 is attached to the bottom surface 580 of the small diameter portion 5813 and the second moving body 94.
  • the third chamber (:) is partitioned into two regions by the second moving body 94 and the fourth biasing member 93 in contact with the contact portion 94 * 3.
  • the volume of the third region (: 1 The second moving body 94 moves in the opposite direction, that is, in the direction in which the second valve body 9413 is seated on the second valve seat 831. By doing so, the third area (: 1 ⁇ is reduced and the volume of the fourth area ⁇ 2 is expanded.
  • the second moving body 94 is urged by the third urging member 92 and the fourth urging member 93, and the second valve seat 83 ⁇ 1 is pressed against the second valve body 94.
  • the brake fluid pressure is not transmitted from the second chamber (6) to the third chamber (see Fig. 4).
  • the moving body 94 moves against the biasing forces of the third biasing member 92 and the fourth biasing member 93 and the brake fluid pressure exceeds a predetermined second pressure value
  • the second The second valve body 9413 is released from the valve seat 83 ⁇ 1, and the second chamber: 6 to the third chamber (: 3rd region ⁇ 1 to the 4th region ⁇ 2). Hydraulic pressure is transmitted (see Fig. 5).
  • the first urging member 86, the fourth urging member 93, and the elastic member 90 are divided into a loading process (a process in which the displacement changes from 0 to 31) and an unloading process (a process in which the displacement changes from 3 When the displacement is the same 3 in the process of changing from 1 to 0), the restoring force in the loading process and the restoring force in the unloading process have different magnitudes. configured and formed as a ring-shaped member.
  • Examples of materials for the first biasing member 86, the fourth biasing member 93, and the elastic member 90 include chetylene-propylene-diene rubber. , elastomer springs made of materials such as silicon can be used. Also, the first biasing member 86, the fourth biasing member 93, and the elastic member 90 are
  • It may be made of one material or may be made of multiple materials.
  • £ may be sandwiched between silicon having a relatively high modulus of rebound resilience.
  • it is possible to adjust the modulus of rebound resilience of the urging member in accordance with the peculiar pulsation frequency caused by the performance of the brake fluid pressure pump 60 .
  • the second biasing member 89 and the third biasing member 92 have the same displacement as the first biasing member 86 and the fourth biasing member 93, for example, as shown in FIG.
  • Unloading process when 3 (displacement changes from 3 2 to 0 ⁇ 02022/249014 Restoration force in ⁇ (: 1' 2022/054780 process)? is the same displacement of 3, the unloading process of the first biasing member 86 and the fourth biasing member 93 (the process of changing the displacement from 31 to 0) or the loading process (the displacement of 0 to 3 It is composed of an elastic body with a characteristic scale 2 that is larger than the restoring force in the process of changing to 1).
  • first biasing member 86 and the fourth biasing member 93 for example, metal springs can be used. Also, the first biasing member 86 and the fourth biasing member 93 may be made of one material, or may be made of a plurality of materials. Depending on the combination and shape of materials, the rebound elastic modulus of the urging member can be adjusted in accordance with the inherent pulsation frequency generated due to the performance of the brake fluid pressure pump 60.
  • the first biasing member 86, the second biasing member 89, the third biasing member 92, the fourth biasing member 93, and the elastic member 90 constitute a brake fluid pressure control device. Characteristics such as the spring constant are appropriately designed according to the pulsation tendency of the brake fluid pressure inside.
  • the brake fluid pressure on the discharge side of the pump 60 rises to a predetermined first pressure value 1 immediately after the pump 60 starts to be driven.
  • the brake fluid pressure acts on the first moving body 84, and the first moving body 84 acts on the first urging member It is moved against the biasing force of 86 and second biasing member 89 .
  • part of the energy of the brake fluid pressure is consumed by moving the first moving body 84 against the biasing force of the first biasing member 86 and the second biasing member 89. This is what happens.
  • the first moving body 84 is moved against the biasing force of the first biasing member 86 and the second biasing member 89. Therefore, a part of the energy of the brake fluid pressure is consumed by these biasing members, and the fluctuation of the brake fluid pressure in the second area entering the first chamber is reduced to the first area entering the first chamber. Reduced compared to brake fluid pressure fluctuations in input 1.
  • the brake fluid pressure entering the second region 2 entering the first chamber passes through the communication hole 82 ⁇ 1 of the first partition member 82 and is transmitted to the second chamber 6. .
  • pressure loss occurs in the brake fluid because it passes through the throttle formed by the communication hole 82 ⁇ 1 of the first partition member 82, and a part of the energy of the brake fluid pressure is consumed, resulting in the second chamber. Fluctuations in brake fluid pressure within 8 are reduced compared to fluctuations in brake fluid pressure within the first chamber.
  • the first moving body 84 is moved by the biasing force of the second biasing member 89, and the first The valve body 87 is moved to the first valve seat 8513 side.
  • the first biasing member 86 has hysteresis in the restoring force between the loading process and the unloading process as described above, it is contracted by the pressing force of the first moving body 84, and the second moving body 9 It takes a predetermined period of time to return to a displacement where the biasing force can be applied to 4 .
  • the brake fluid pressure of the first moving body 84 and the second moving body 94 begins to rise, the first moving body 84 and the second moving body 94 are subject only to the biasing forces of the second biasing member 89 and the third biasing member 92, respectively.
  • the third region The brake fluid pressure can exceed the second pressure value 2. This can reduce the amount of drop in the brake fluid pressure in the fourth region 02.
  • the pulsation reducing device of the present embodiment is configured such that the first valve body 87 is seated on the first valve seat 8413, and the first valve body 87 is placed on the first valve seat 8413.
  • a state in which the second valve body 9413 is seated on the second valve seat 8313 A state in which the second valve body 9413 is seated on the second valve seat 8313 A state in which the second valve body 9413 is seated on the second valve seat 8313
  • a vehicle brake system 1 includes a brake fluid pressure circuit 2 that supplies brake fluid pressure from a master cylinder 11 to a wheel cylinder 12, and a brake in the brake fluid pressure circuit 2.
  • a pump 60 for increasing the hydraulic pressure and a brake hydraulic pressure control device 50 for controlling the brake hydraulic pressure are provided.
  • pulsation may occur in the brake fluid pressure as the pump 60 is driven. or propagate to the engine room of a vehicle equipped with a brake system 1 equipped with a pump 60, and cause discomfort or discomfort to a vehicle driver (for example, a vehicle driver, a fellow passenger, a person outside the vehicle, etc.). Possible noise may occur.
  • ⁇ 0 2022/249014 ⁇ (:1' 2022/054780
  • the brake fluid pressure control device 50 of the brake system 1 of this embodiment includes a pulsation reducing device that reduces the pulsation of the brake fluid pressure in the brake hydraulic circuit 2.
  • a pulsation reduction device is provided in a vehicle brake system comprising a brake fluid pressure circuit (2) for supplying brake fluid pressure to a wheel cylinder (12) and a pump (60) for boosting the brake fluid pressure.
  • a pulsation reduction device (37,
  • a connection position connecting the chamber (in) and the second chamber (6), and a first valve body (87) moving to the second connection portion includes a second valve seat ( 83 !) A non-connecting position where the second chamber (: 6) and the third chamber (O are not connected), and a position where the second valve seat ( 83 ! is separated and the second chamber (6 ) and the third chamber (O), and the second valve body (9413) moving to
  • the second chamber (: 6) connected between the first chamber (ON) and the third chamber ( ⁇ ) is the brake in the second chamber (: 6) Since it includes an elastic member (90) that elastically changes with changes in hydraulic pressure, and that shrinks in volume when the brake fluid pressure rises and expands in volume when the brake fluid pressure drops, the first Fluctuations in brake fluid pressure caused by the operation of the first valve body (87) in the chamber (on) and the second valve body (9413) in the third chamber ( ⁇ ) are taken as elastic changes in the elastic member (90).
  • the brake fluid pressure circuit (2) can be absorbed by the brake fluid pressure circuit (2), reducing the speed of change and fluctuation range of the brake fluid pressure in the third chamber ( ⁇ ), which is output to the brake fluid pressure circuit of the vehicle ( 2) It is possible to reduce the pulsation of the brake fluid pressure inside.
  • the elastic member (90) provided in the second chamber (:6) of the pulsation reducing device (37, 80) of the brake fluid pressure control device 50 of this embodiment is an elastomer spring.
  • it is a structure formed of materials such as chetylene, propylene, genrubber, and silicone. According to such a configuration, the elastic change of the elastic member (90) due to the change of the brake fluid pressure in the second chamber (8) is ⁇ 0 2022/249014 ⁇ (:1' 2022/054780 It is possible to reduce the fluctuation of the brake fluid pressure and reduce the pulsation of the brake fluid pressure in the brake fluid pressure circuit 2 of the vehicle.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Regulating Braking Force (AREA)

Abstract

La présente invention concerne un dispositif de régulation de pression de fluide de frein capable de réduire les pulsations dans la pression de fluide de frein dans le circuit hydraulique de frein d'un véhicule. Un dispositif de réduction de pulsation comprend : une première chambre (A) dans laquelle une pression de fluide de frein est entrée à partir d'un circuit hydraulique de frein (2) ; une deuxième chambre (B) qui est raccordée à la première chambre (A) ; et une troisième chambre (C) qui est raccordée à la deuxième chambre (B) et qui fournit une pression de fluide de frein au circuit hydraulique de frein (2), la première chambre (A) étant pourvue d'un premier corps de soupape (87) et d'un premier siège de soupape (84b) contre lequel s'appuie le premier corps de soupape (87) et duquel il est délogé, la troisième chambre est pourvue d'un second corps de soupape (94b) et d'un second siège de soupape (83b) contre lequel le second corps de soupape (94b) s'appuie et duquel il est délogé, et la deuxième chambre (B) est pourvue d'un élément élastique (90) qui change élastiquement en fonction des changements de pression de fluide de frein à l'intérieur de la deuxième chambre (B), le volume de l'élément élastique (90) se contractant lorsque la pression du fluide de frein augmente et se dilate lorsque la pression du fluide de frein diminue.
PCT/IB2022/054780 2021-05-28 2022-05-23 Dispositif de réduction de pulsation et dispositif de régulation de pression de fluide de frein de véhicule comprenant ledit dispositif de réduction de pulsation WO2022249014A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2023523697A JP7546161B2 (ja) 2021-05-28 2022-05-23 脈動低減装置および該脈動低減装置を備える車両のブレーキ液圧制御装置

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JP2021090184 2021-05-28
JP2021-090184 2021-05-28

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WO2022249014A1 true WO2022249014A1 (fr) 2022-12-01

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013224818A1 (de) * 2013-12-04 2015-06-11 Robert Bosch Gmbh Dämpfer
US20150353065A1 (en) * 2013-01-25 2015-12-10 Nissin Kogyo Co., Ltd. Vehicular brake hydraulic pressure control apparatus
WO2019207385A1 (fr) * 2018-04-23 2019-10-31 ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング Unité amortisseur et unité de commande de pression hydraulique équipée de cette dernière
DE102020208639A1 (de) * 2019-08-29 2021-03-04 Continental Teves Ag & Co. Ohg Ventilbaugruppe
WO2022118113A1 (fr) * 2020-12-01 2022-06-09 ロベルト•ボッシュ•ゲゼルシャフト•ミト•ベシュレンクテル•ハフツング Dispositif de pompe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150353065A1 (en) * 2013-01-25 2015-12-10 Nissin Kogyo Co., Ltd. Vehicular brake hydraulic pressure control apparatus
DE102013224818A1 (de) * 2013-12-04 2015-06-11 Robert Bosch Gmbh Dämpfer
WO2019207385A1 (fr) * 2018-04-23 2019-10-31 ローベルト ボッシュ ゲゼルシャフト ミット ベシュレンクテル ハフツング Unité amortisseur et unité de commande de pression hydraulique équipée de cette dernière
DE102020208639A1 (de) * 2019-08-29 2021-03-04 Continental Teves Ag & Co. Ohg Ventilbaugruppe
WO2022118113A1 (fr) * 2020-12-01 2022-06-09 ロベルト•ボッシュ•ゲゼルシャフト•ミト•ベシュレンクテル•ハフツング Dispositif de pompe

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JP7546161B2 (ja) 2024-09-05

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