WO2015025720A1 - マスタシリンダ - Google Patents
マスタシリンダ Download PDFInfo
- Publication number
- WO2015025720A1 WO2015025720A1 PCT/JP2014/070827 JP2014070827W WO2015025720A1 WO 2015025720 A1 WO2015025720 A1 WO 2015025720A1 JP 2014070827 W JP2014070827 W JP 2014070827W WO 2015025720 A1 WO2015025720 A1 WO 2015025720A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- relief port
- piston
- cylinder
- master cylinder
- hydraulic
- Prior art date
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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
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
- B60T11/16—Master control, e.g. master cylinders
- B60T11/22—Master control, e.g. master cylinders characterised by being integral with reservoir
-
- 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
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
- B60T11/16—Master control, e.g. master cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
- F15B7/06—Details
- F15B7/08—Input units; Master units
-
- 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
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
- B60T11/16—Master control, e.g. master cylinders
- B60T11/232—Recuperation valves
Definitions
- the present invention relates to a master cylinder used in a hydraulic brake system for a vehicle such as an automobile.
- this master cylinder has a cylinder body having a cylinder hole, a piston that slidably inserts into the cylinder hole, a communication passage that is provided in the cylinder body and communicates with a reservoir, and a piston.
- a relief port that is formed and communicates with the communication passage and the hydraulic chamber, and is accommodated in a recess in the inner peripheral surface of the cylinder hole of the cylinder body, and the piston slidably penetrates, and the inner peripheral surface of the cylinder hole and the piston
- a seal member that seals between the outer peripheral surface of the gas passage, and the communication path and the relief port communicate with each other when not operating, and the piston moves during operation and the communication member and the relief port are blocked by the seal member. It has become.
- the relief port functions as a throttle that suppresses the flow of hydraulic fluid from the hydraulic pressure chamber toward the reservoir before passing through the seal member, thereby ensuring brake response at the initial stage of depression of the brake pedal.
- the fluid flow from the reservoir side to the hydraulic chamber side is rapidly caused by the negative pressure tendency in the hydraulic chamber that occurs when the brake operation is suddenly released, the throttling effect by the relief port As a result, rapid fluid supply to the hydraulic chamber is hindered, which may cause a delay in returning the piston or a delay in loosening the brake.
- a second state in which a path is formed in the communication path, and having a flow path control means for switching between the first state and the second state by receiving a flow of hydraulic fluid and deforming or moving in the communication path There is something. (See Patent Document 1).
- the present invention provides a master cylinder capable of further ensuring responsiveness during brake operation, improving slack delay when releasing the brake, ensuring responsiveness during automatic braking, and quickly releasing the residual pressure in the hydraulic chamber.
- the purpose is to do.
- a first invention of the present application includes: a cylinder body having a cylinder hole; a piston that slidably inserts into the cylinder hole; and a communication path that is provided in the cylinder body and communicates with a reservoir.
- a relief port that is formed in the piston and communicates the communication passage and the hydraulic chamber, and is accommodated in a recess in a cylinder hole inner peripheral surface of the cylinder body, and the piston penetrates slidably,
- a seal member that seals between the inner peripheral surface of the cylinder hole and the outer peripheral surface of the piston, and the communication path and the relief port communicate with each other when not operating, and the piston moves when operating and the seal member
- the relief port can be opened and closed on the hydraulic pressure chamber side of the relief port.
- a master cylinder characterized in that it comprises a road control member. According to this configuration, it is possible to further ensure the responsiveness when the brake is operated, improve the slack delay when releasing the brake, ensure the responsiveness during automatic braking, and quickly release the residual pressure in the hydraulic chamber.
- 2nd invention of this application is a master cylinder of Claim 1 provided with the valve mechanism in which the said flow-path control member closes a relief port at the time of an operation
- a fourth invention of the present application is a spring member that is movable in the axial direction of the piston so that the flow path control member opens the relief port when the pressure in the hydraulic chamber is higher than the pressure in the communication path when not operating.
- the master cylinder according to any one of claims 1 to 3, wherein the cylinder is provided in a piston. According to this configuration, it is possible to improve the relaxation delay when releasing the brake and to quickly release the residual pressure in the hydraulic pressure chamber with a simple structure.
- the said flow-path control member has a valve seat which has an opening part corresponding to a relief port, and a flap part which opens and closes the said elastically deformable opening part.
- the master cylinder according to any one of the above. According to this configuration, it is possible to further ensure the responsiveness at the time of brake operation, improve the looseness delay when releasing the brake, ensure the responsiveness at the time of automatic braking, and quickly release the residual pressure in the hydraulic chamber. It can be done with a simple structure.
- FIG. 2 is an enlarged cross-sectional view showing a main part on the primary piston side in FIG. 1, showing a state in which the pressures of the first hydraulic pressure chamber and the first communication passage are balanced when the master cylinder is not operating.
- FIG. 2 is an enlarged cross-sectional view showing a main part on the primary piston side in FIG. 1, showing a state when an automatic brake is activated and a brake hydraulic pressure in a first hydraulic pressure chamber is lowered when a master cylinder is not operated.
- FIG. 2 is an enlarged cross-sectional view showing a main part on the primary piston side in FIG. 1, showing a state in which the primary piston returns to a non-operating position after the brake operation is released and the residual pressure still remains in the first hydraulic pressure chamber. Yes.
- FIG. 1 shows an entire embodiment of a master cylinder according to the present invention.
- the plunger type master cylinder 1 includes a cylinder body 2, and a cylinder hole 3 is formed in the cylinder body 2.
- a primary piston 5 as an example of the piston of the present invention and a secondary piston 7 as an example of the piston of the present invention are slidably inserted.
- the primary piston 5 is moved to the left by a brake pedal (not shown) or a brake booster that boosts and outputs the depression force of the brake pedal.
- the first hydraulic pressure chamber 10 is defined between the primary piston 5 and the secondary piston 7 in the cylinder hole 3, and the second hydraulic pressure chamber 11 is the secondary piston.
- a partition is formed between 7 and the bottom 4 of the cylinder hole 3.
- a first shaft member 12 is screwed to a column portion 6 positioned at the axial center of the primary piston 5, and the first shaft member 12 has a pair of first and second left and right.
- Two retainers 14 and 15 are provided. Although the first retainer 14 is fixed to the first shaft member 12, the second retainer 15 is slidable on the first shaft member 12. The second retainer 15 comes into contact with a latching portion 35 formed at the left end of the first shaft member 12, so that the first and second retainers 14 and 15 are set in a state of being maximally separated from each other as shown in FIG. .
- a first return spring 16 is contracted between the first and second retainers 14 and 15. The first retainer 14 is always in contact with the primary piston 5 and the second retainer 15 is always in contact with the secondary piston 7.
- the second hydraulic pressure chamber 11 is provided with a second shaft member 13 screwed to the column portion 6 positioned at the axial center of the secondary piston 7. And the 4th retainers 17 and 18 are provided.
- the third retainer 17 is fixed to the second shaft member 13, the fourth retainer 18 is slidable on the second shaft member 13.
- the fourth retainer 18 abuts on a latching portion 35 formed at the left end of the second shaft member 13 so that the third and fourth retainers 17 and 18 are set in a state of being separated from each other as shown in FIG. .
- a second return spring 19 is contracted between the third and fourth retainers 17 and 18.
- the third retainer 17 is always in contact with the secondary piston 7 and the fourth retainer 18 is always in contact.
- the cylinder body 2 is provided with a reservoir 20.
- the reservoir 20 can be communicated with the first hydraulic chamber 10 via a first relief port 22 formed in the first communication passage 21 and the primary piston 5 and constantly communicating with the first hydraulic chamber 10.
- the first relief port 22 is formed in the cylindrical portion 36 of the primary piston 5 so as to communicate the first hydraulic chamber 10 on the inner peripheral side of the primary piston 5 with the first communication passage 21 on the outer peripheral side. It is composed of communication holes.
- the reservoir 20 can communicate with the second hydraulic pressure chamber 11 via the second communication passage 23 and the second relief port 24 formed in the secondary piston 7.
- the second relief port 24 is also drilled in the cylindrical portion 36 of the secondary piston 7, and the second hydraulic chamber 11 on the inner peripheral side of the secondary piston 7 and the second link on the outer peripheral side. It is comprised from the communicating hole of the radial direction which connects the channel
- a first seal member 26 that is an annular cup seal having a substantially E-shaped cross section is accommodated, and the primary piston 5 is the first seal.
- the member 26 is liquid-tightly and slidably penetrated.
- the first hydraulic chamber 10 communicates with the first output port 29 and is connected to the wheel cylinder of the wheel of one brake system of the two brake systems (not shown) via the first output port 29. Yes.
- the second hydraulic pressure chamber 11 communicates with the second output port 30 and is connected to the wheel cylinder of the wheel of the other brake system through the second output port 30. Has been.
- a first hermetic seal recess 31 is provided on the inner periphery of the cylinder hole 3 of the cylinder body 2 where the primary piston 5 is disposed, and the first hermetic seal recess 31 is provided with a first hermetic seal 32. It has been.
- the primary piston 5 passes through the first hermetic seal 32 so as to be slidable.
- the cup seal of the first hermetic seal 32 is a conventionally known cup seal, and is formed between the inner peripheral surface of the cylinder hole 3 of the cylinder body 2 and the outer peripheral surface of the primary piston 5. Liquid tightness is ensured.
- annular second seal member 28 is accommodated in the second recess 27 of the cylinder hole 3 in which the secondary piston 7 is disposed, and the second hermetic seal recess 33 has a second hermetic seal.
- a seal 34 is provided, and the secondary piston 7 penetrates through the second seal member 28 and the second hermetic seal 34 so as to be liquid-tight and slidable.
- the second recess 27, the second seal member 28, the second sealing seal recess 33 and the second sealing seal 34 are the first recess 25, the first seal member 26, the first sealing seal recess 31 and the second sealing seal 34 shown in FIG. It is composed of exactly the same as one hermetic seal 32. Therefore, detailed description of the second recess 27, the second seal member 28, the second seal seal recess 33, and the second seal 34 is omitted.
- FIG. 2 is an enlarged cross-sectional view showing the main part on the primary piston 5 side in FIG. 1, and the pressure in the first hydraulic chamber 10 and the first communication passage 21 is balanced when the plunger type master cylinder 1 is not in operation. It shows the state.
- a flow path control member 40 is disposed on the inner periphery of the first relief port 22.
- the flow path control member 40 is slidable on the inner peripheral surface of the first relief port 22 and has a first annular portion 42 having an opening 41 at a position facing the first relief port 22, and the axial center of the primary piston 5.
- the second annular portion 43 slidable with the column portion 6, the disc portion 44 connecting the two annular portions, and the flap valve 45 capable of opening and closing the opening 41 of the first annular portion 42.
- the flow path control member 40 is in contact with the first retainer 14 when a spring 46 attached to the outer periphery of the column portion 6 of the primary piston 5 pushes the disk portion 44.
- a flap valve 45 is attached to the first annular portion 42.
- the flow path control member 40 contacts the first retainer 14 and flaps in this way.
- the valve 45 closes the first relief port 22 and the brake fluid in the first hydraulic chamber 10 is sealed.
- FIG. 3 is an enlarged cross-sectional view showing the main part on the primary piston 5 side in FIG. 1, and when the plunger type master cylinder 1 is not in operation, for example, a skid prevention device (Electronic Stability Control) is activated. The state when the brake fluid pressure in the 1 fluid pressure chamber 10 is decreasing is shown.
- a skid prevention device Electric Stability Control
- the hydraulic pump of the hydraulic unit (not shown) starts to operate.
- the hydraulic pump sucks the hydraulic fluid in the reservoir 20 into the first hydraulic chamber 10 and supplies the hydraulic fluid to the brake device of each wheel via the hydraulic pipe.
- the inside of the first hydraulic pressure chamber 10 becomes negative pressure
- the flap valve 45 of the flow path control member 40 is elastically deformed radially inward as shown in the figure, and the working fluid in the reservoir 20 is transferred to the first hydraulic pressure chamber 10. To be supplied.
- FIG. 4 is an enlarged cross-sectional view showing the main part on the primary piston 5 side in FIG. 1. After the brake operation is released, the primary piston 5 returns to the non-actuated position and is still in the first hydraulic pressure chamber 10. Indicates the remaining state.
- the residual pressure in the first hydraulic pressure chamber 10 acts in the direction of compressing the spring 46 from the right side of the flow path control member 40, moves the flow path control member 40 to the right side, and causes the first relief port 22 to move to the first hydraulic pressure. Open to communicate with the chamber 10. As a result, the residual pressure decreases and the flow path control member 40 returns to a predetermined non-operating position (FIG. 2).
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Transmission Of Braking Force In Braking Systems (AREA)
Abstract
Description
(特許文献1を参照)。
本願の第1の発明は、シリンダ孔を有するシリンダ本体と、前記シリンダ孔内に摺動可能に挿入された液圧室を区画するピストンと、前記シリンダ本体に設けられリザーバに連通する連通路と、前記ピストンに形成されて前記連通路と前記液圧室とを連通するリリーフポートと、前記シリンダ本体のシリンダ孔内周面の凹部に収容されるとともに前記ピストンが摺動可能に貫通して、前記シリンダ孔内周面と前記ピストンの外周面との間をシールするシール部材とを備え、非作動時に前記連通路と前記リリーフポートとが連通し、作動時に前記ピストンが移動して前記シール部材により前記連通路とリリーフポートとが遮断されるようになっているマスタシリンダにおいて、前記リリーフポートの前記液圧室側にリリーフポートを開閉可能な流路制御部材を備えることを特徴とするマスタシリンダである。
この構成によれば、ブレーキ作動時における応答性の更なる確保と、ブレーキ解除時の弛め遅れの改善、自動ブレーキ時の応答性の確保、液圧室内の残圧を速やかに開放できる。
この構成によれば、ブレーキ作動時における応答性の更なる確保が簡単な構造でできる。
この構成によれば、自動ブレーキ時の応答性の確保が簡単な構造でできる。
この構成によれば、ブレーキ解除時の弛め遅れの改善、液圧室内の残圧を速やかに開放することが簡単な構造でできる。
この構成によれば、ブレーキ作動時における応答性の更なる確保と、ブレーキ解除時の弛め遅れの改善、自動ブレーキ時の応答性の確保、液圧室内の残圧を速やかに開放することが簡単な構造でできる。
Claims (5)
- シリンダ孔を有するシリンダ本体と、前記シリンダ孔内に摺動可能に挿入された液圧室を区画するピストンと、前記シリンダ本体に設けられリザーバに連通する連通路と、前記ピストンに形成されて前記連通路と前記液圧室とを連通するリリーフポートと、前記シリンダ本体のシリンダ孔内周面の凹部に収容されるとともに前記ピストンが摺動可能に貫通して、前記シリンダ孔内周面と前記ピストンの外周面との間をシールするシール部材とを備え、非作動時に前記連通路と前記リリーフポートとが連通し、作動時に前記ピストンが移動して前記シール部材により前記連通路とリリーフポートとが遮断されるようになっているマスタシリンダにおいて、
前記リリーフポートの前記液圧室側にリリーフポートを開閉可能な流路制御部材を備えることを特徴とするマスタシリンダ。 - 前記流路制御部材は、作動時にリリーフポートを閉鎖する弁機構を備える請求項1に記載のマスタシリンダ。
- 前記流路制御部材は、非作動時で液圧室の圧力よりも連通路の圧力が高い時にリリーフポートを開放する弁機構を備える請求項1に記載のマスタシリンダ。
- 非作動時で連通路の圧力よりも液圧室の圧力が高い時に前記流路制御部材がリリーフポートを開放するよう前記ピストンの軸方向に移動可能とするばね部材をピストン内に備える請求項1から請求項3のいずれかに記載のマスタシリンダ。
- 前記流路制御部材は、リリーフポートに対応した開口部を有する弁座と、弾性変形可能な前記開口部を開閉するフラップ部を有する請求項1から請求項4のいずれかに記載のマスタシリンダ。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/912,703 US9944263B2 (en) | 2013-08-22 | 2014-08-07 | Master cylinder |
EP14838321.9A EP3037310B1 (en) | 2013-08-22 | 2014-08-07 | Master cylinder |
JP2015532801A JP6025990B2 (ja) | 2013-08-22 | 2014-08-07 | マスタシリンダ |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013172001 | 2013-08-22 | ||
JP2013-172001 | 2013-08-22 |
Publications (1)
Publication Number | Publication Date |
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WO2015025720A1 true WO2015025720A1 (ja) | 2015-02-26 |
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ID=52483500
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2014/070827 WO2015025720A1 (ja) | 2013-08-22 | 2014-08-07 | マスタシリンダ |
Country Status (4)
Country | Link |
---|---|
US (1) | US9944263B2 (ja) |
EP (1) | EP3037310B1 (ja) |
JP (1) | JP6025990B2 (ja) |
WO (1) | WO2015025720A1 (ja) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09136639A (ja) * | 1995-11-14 | 1997-05-27 | Nabco Ltd | マスタシリンダ |
JP2001180471A (ja) | 1999-12-24 | 2001-07-03 | Bosch Braking Systems Co Ltd | プランジャ型マスタシリンダ |
JP2007022363A (ja) * | 2005-07-19 | 2007-02-01 | Advics:Kk | プランジャ型マスタシリンダ |
-
2014
- 2014-08-07 US US14/912,703 patent/US9944263B2/en active Active
- 2014-08-07 JP JP2015532801A patent/JP6025990B2/ja active Active
- 2014-08-07 WO PCT/JP2014/070827 patent/WO2015025720A1/ja active Application Filing
- 2014-08-07 EP EP14838321.9A patent/EP3037310B1/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09136639A (ja) * | 1995-11-14 | 1997-05-27 | Nabco Ltd | マスタシリンダ |
JP2001180471A (ja) | 1999-12-24 | 2001-07-03 | Bosch Braking Systems Co Ltd | プランジャ型マスタシリンダ |
JP2007022363A (ja) * | 2005-07-19 | 2007-02-01 | Advics:Kk | プランジャ型マスタシリンダ |
Also Published As
Publication number | Publication date |
---|---|
JP6025990B2 (ja) | 2016-11-16 |
EP3037310A1 (en) | 2016-06-29 |
JPWO2015025720A1 (ja) | 2017-03-02 |
US20160200303A1 (en) | 2016-07-14 |
US9944263B2 (en) | 2018-04-17 |
EP3037310A4 (en) | 2016-09-14 |
EP3037310B1 (en) | 2020-04-01 |
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