JPS6345337B2 - - Google Patents

Info

Publication number
JPS6345337B2
JPS6345337B2 JP703780A JP703780A JPS6345337B2 JP S6345337 B2 JPS6345337 B2 JP S6345337B2 JP 703780 A JP703780 A JP 703780A JP 703780 A JP703780 A JP 703780A JP S6345337 B2 JPS6345337 B2 JP S6345337B2
Authority
JP
Japan
Prior art keywords
pressure
pressure chamber
master cylinder
dual
outlet
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
JP703780A
Other languages
Japanese (ja)
Other versions
JPS55102762A (en
Inventor
Jatsuku Kare Jan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DBA SA
Original Assignee
DBA SA
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 DBA SA filed Critical DBA SA
Publication of JPS55102762A publication Critical patent/JPS55102762A/en
Publication of JPS6345337B2 publication Critical patent/JPS6345337B2/ja
Granted legal-status Critical Current

Links

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
    • B60T11/28—Valves specially adapted therefor
    • B60T11/34—Pressure reducing or limiting valves
    • 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
    • B60T11/20—Tandem, side-by-side, or other multiple master cylinder 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
    • B60T11/28—Valves specially adapted therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Transmission Of Braking Force In Braking Systems (AREA)

Description

【発明の詳細な説明】 本発明は二系統マスターシリンダに関するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dual-system master cylinder.

自動車のブレーキ回路に用いられる二系統マス
ターシリンダは独立したブレーキ回路によつて２
組のブレーキモータにそれぞれ連結される２つの
圧力室内のブレーキ流体を加圧する。 The two-system master cylinder used in automobile brake circuits has two independent brake circuits.
The brake fluid in two pressure chambers each connected to a set of brake motors is pressurized.

理論的には２つの圧力室内の圧力は同一であ
る。しかし、実際には、これらの圧力は約2.04〜
8.16Kg／cm2（２〜８バール）の僅かな値を異なつ
ていることが判つている。この圧力差は主に４つ
の理由、即ちピストン上の密封リングとマスター
シリンダの孔との間で存在する摩擦、ピストンを
押圧する２つの戻しばねのこわさの差、補給オリ
フイスを閉じるに必要な２つのピストンの無効行
程の差及び２つのブレーキ回路と２組のブレーキ
モータとの間の吸収性の差によるものである。さ
らに、この圧力差は常に一定ではなく、ペダルの
行程の関数として変化することが判つている。 Theoretically, the pressures in the two pressure chambers are the same. But in reality, these pressures are around 2.04~
It has been found that they differ by a small value of 8.16 Kg/cm 2 (2-8 bar). This pressure difference is caused by four main reasons: the friction that exists between the sealing ring on the piston and the hole in the master cylinder, the difference in the stiffness of the two return springs that press against the piston, and the stiffness required to close the supply orifice. This is due to the difference in dead stroke of the two pistons and the difference in absorption between the two brake circuits and the two sets of brake motors. Furthermore, it has been found that this pressure difference is not always constant, but varies as a function of pedal travel.

結果として、特に各組のブレーキモータが車両
の一方の側の前車輪と組み合わされたブレーキモ
ータ及び車両の他方の側の後車輪と組み合わされ
たブレーキモータから成るＸ型に配列されたブレ
ーキ回路の場合には、ブレーキライニングの摩耗
が異なる。 As a result, in particular an X-shaped arrangement of brake circuits in which each set of brake motors consists of a brake motor associated with the front wheels on one side of the vehicle and a brake motor associated with the rear wheels on the other side of the vehicle. In some cases, the wear of the brake linings is different.

この欠点を排除するため、本発明は、２つの独
立したブレーキ回路にそれぞれ連結される出口を
具えた２つの圧力室を包含し、作動時２つの圧力
室間に僅かな圧力差が生じ得る二系統マスターシ
リンダにおいて、高い圧力が発生する方の圧力室
の出口に、対応するブレーキ回路に伝達される流
体圧力を上記圧力差に略等しい一定値だけ常に低
下させるように設定された保留弁を設け、上記保
留弁は実質的に制限されない上記圧力室への流体
戻り流れを許容していることを特徴とする二系統
マスターシリンダを提案するものである。 To eliminate this drawback, the present invention includes two pressure chambers each with an outlet connected to two independent braking circuits, in which a slight pressure difference may occur between the two pressure chambers during operation. In the system master cylinder, a holding valve is provided at the outlet of the pressure chamber in which higher pressure is generated, which is set to always reduce the fluid pressure transmitted to the corresponding brake circuit by a constant value approximately equal to the pressure difference. , proposes a dual-path master cylinder, characterized in that the retention valve allows a substantially unrestricted flow of fluid back to the pressure chamber.

本発明によると、２組のブレーキモータに供給
される流体圧力の差を減少させて車両の異なつた
摩擦要素の摩耗を事実上均一にしていることが理
解できよう。 It will be appreciated that, in accordance with the present invention, the difference in fluid pressure supplied to the two sets of brake motors is reduced to substantially equalize the wear of the different friction elements of the vehicle.

本発明の一実施例を添付図面を参照して詳細に
説明する。 An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

図面において、マスターシリンダ１０は盲孔１
４を具えたハウジング１２を有する。孔１４内に
は第１のピストン１６と第２のピストン２０が流
体密封態様で摺動自在に収容され、第１ピストン
は図示しない外部の要素によつて変位され、第２
ピストンは孔１４の底部２２と第１ピストンとの
間に配設されている。第１の戻しばね２４が第２
ピストン２０に当接して第１ピストン１６を停止
部材２６に向けて押圧し、第２の戻しばね２８が
孔１４の底部２２に当接して第２ピストン２０を
停止部材３０に向けて押圧する。 In the drawing, the master cylinder 10 has a blind hole 1
4. The housing 12 has a housing 12 with a A first piston 16 and a second piston 20 are slidably housed in the bore 14 in a fluid-tight manner, the first piston being displaced by an external element (not shown), and the second piston 20 being displaced by an external element (not shown).
The piston is disposed between the bottom 22 of the bore 14 and the first piston. The first return spring 24
The second return spring 28 abuts against the piston 20 and forces the first piston 16 toward the stop 26 , and the second return spring 28 abuts the bottom 22 of the bore 14 and forces the second piston 20 toward the stop 30 .

孔１４と２つのピストンは協働してそれらの間
に第１の圧力室３２を限界し、孔１４、底部及び
第２ピストンは協働してそれらの間に第２の圧力
室３４を限界する。室３２と３４は当業技術分野
においては周知のように充填孔と補給孔によつて
貯蔵器に連結される。 The bore 14 and the two pistons cooperate to define a first pressure chamber 32 between them, and the bore 14, the bottom and the second piston cooperate to define a second pressure chamber 34 between them. do. Chambers 32 and 34 are connected to the reservoir by fill and replenishment holes as is well known in the art.

第１圧力室３２は開口又は出口３６によつて第
１の組のブレーキモータに連通する第１の回路に
連結され、第２圧力室３４は開口又は出口３８に
よつて第２の組のブレーキモータに連通する第２
の回路に連結される。 The first pressure chamber 32 is connected by an opening or outlet 36 to a first circuit communicating with the brake motors of the first set, and the second pressure chamber 34 is connected by an opening or outlet 38 to a first circuit communicating with the brake motors of the second set. the second communicating with the motor;
connected to the circuit.

図面にはまた符号１００で示されている保留弁
が示されており、保留弁は第１圧力室３２の出口
３６と上記第１回路に連結された開口４８との間
に配設されている。保留弁１００はハウジング１
２と一体に形成されたハウジング１０１を有し、
ハウジング１０１内には開口４８と３６にそれぞ
れ連通する大径部１０４と小径部１０６を含む室
１０２が形成されている。大径部１０４と小径部
１０６は弁部材１１０のための座１０８を限界す
る肩部によつて分けられている。弾性材料製の弁
部材１１０は室１０２の大径部１０４内に配置さ
れた環状胴部１１２を有する。環状胴部１１２は
その一端を閉塞されている。この端部には軸方向
通路が形成され、軸方向通路は室１０２の小径部
１０６内に突出する「かものくちばし」形の唇部
１１４によつて閉じられている。ばね１１６が弁
部材１１０を座１０８に対して押圧している。 Also shown in the drawing is a retention valve, designated 100, which is disposed between the outlet 36 of the first pressure chamber 32 and the opening 48 connected to said first circuit. . The retention valve 100 is a housing 1
has a housing 101 integrally formed with 2;
A chamber 102 is formed within the housing 101 and includes a large diameter portion 104 and a small diameter portion 106 that communicate with the openings 48 and 36, respectively. The large diameter section 104 and the small diameter section 106 are separated by a shoulder that defines a seat 108 for the valve member 110. Valve member 110 made of resilient material has an annular body 112 disposed within large diameter portion 104 of chamber 102 . The annular body 112 is closed at one end. An axial passage is formed at this end and is closed by a "duck beak" shaped lip 114 projecting into the small diameter portion 106 of the chamber 102. A spring 116 urges the valve member 110 against the seat 108.

上述したマスターシリンダは次のように作動す
る。ブレーキ適用時圧力室３２と３４内のブレー
キ流体は２つのピストン１６と２０の協働した移
動によつて加圧される。実際には、２つの圧力室
内の圧力は上述した理由により常に僅かな値を異
なつている。 The master cylinder described above operates as follows. During brake application, the brake fluid in the pressure chambers 32 and 34 is pressurized by the coordinated movement of the two pistons 16 and 20. In reality, the pressures in the two pressure chambers always differ by a small value for the reasons mentioned above.

例えば、高い圧力が発生している室が第１圧力
室３２であると仮定する。圧力室３２から対応す
る組のブレーキモータに連通する回路へ伝達され
るブレーキ流体はばね１１６の力に抗して弁部材
１１０を座１０８から離すことによつて保留弁１
００を通つて流れ、ばね１１６の目盛定めの関数
として流体圧力を所定値に減少させる。ばね１１
６は、上記所定値に減少される圧力室３２内に発
生する圧力が圧力室３４内に発生する圧力に略等
しくなるように選定される。従つて、２組のブレ
ーキモータは略等しい圧力のブレーキ流体を常に
供給され、上述した利点を得ることができるもの
である。 For example, assume that the chamber in which high pressure is generated is the first pressure chamber 32. The brake fluid transferred from the pressure chamber 32 to the circuit communicating with the brake motor of the corresponding set is transferred to the retention valve 1 by moving the valve member 110 away from the seat 108 against the force of the spring 116.
00, reducing the fluid pressure to a predetermined value as a function of the calibrating of spring 116. spring 11
6 is selected such that the pressure generated in the pressure chamber 32, which is reduced to the predetermined value, is approximately equal to the pressure generated in the pressure chamber 34. Therefore, the two sets of brake motors are always supplied with brake fluid of approximately equal pressure, and the above-mentioned advantages can be obtained.

ブレーキ解放時ブレーキ流体は「かものくちば
し」形の唇部１１４を互いに離して軸方向通路を
開くことによつてブレーキモータからマスターシ
リンダの圧力室３２へ自由に流れることができ
る。 Upon brake release, brake fluid is allowed to flow freely from the brake motor to the pressure chamber 32 of the master cylinder by separating the "duck beak" shaped lips 114 from each other to open an axial passage.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は本発明による保留弁を備えた二系統マス
ターシリンダの縦断面図である。 １０……二系統マスターシリンダ、１２，１０
１……ハウジング、１４……盲孔、１６，２０…
…ピストン、３２，３４……圧力室、３６，３８
……出口、４８……開口、１００……保留弁、１
０２……室、１０８……座、１１０……弁部材、
１１２……環状胴部、１１４……唇部、１１６…
…ばね。 The drawing is a longitudinal sectional view of a dual-system master cylinder equipped with a retention valve according to the present invention. 10...Two-system master cylinder, 12,10
1... Housing, 14... Blind hole, 16, 20...
...Piston, 32, 34...Pressure chamber, 36, 38
...Outlet, 48...Opening, 100...Retention valve, 1
02... Chamber, 108... Seat, 110... Valve member,
112...Annular trunk, 114...Lip, 116...
...Spring.

Claims (1)

【特許請求の範囲】 １ ２つの独立したブレーキ回路にそれぞれ連結
される出口を具えた２つの圧力室を包含し、作動
時２つの圧力室間に僅かな圧力差が生じ得る二系
統マスターシリンダにおいて、高い圧力が発生す
る方の圧力室の出口に、対応するブレーキ回路に
伝達される流体圧力を上記圧力差に略等しい一定
値だけ常に低下させるように設定された保留弁を
設け、上記保留弁は実質的に制限されない上記圧
力室への流体戻り流れを許容していることを特徴
とする二系統マスターシリンダ。 ２ 上記保留弁は、適宜に設定されたばねによつ
て上記圧力室の出口に形成された座に対して押圧
される弾性材料製の弁部材から成り、上記弁部材
は上記圧力室に向かつて延びたくちばし形の唇部
によつて閉塞される軸方向通路を有し、上記唇部
は実質的に制限されない上記圧力室への流体戻り
流れを許容するように互いに離れることができる
ことを特徴とする特許請求の範囲第１項記載の二
系統マスターシリンダ。[Claims] 1. In a dual-system master cylinder that includes two pressure chambers each having an outlet connected to two independent brake circuits, and in which a slight pressure difference may occur between the two pressure chambers during operation. A holding valve is provided at the outlet of the pressure chamber in which higher pressure is generated, and is set to always reduce the fluid pressure transmitted to the corresponding brake circuit by a constant value approximately equal to the pressure difference, and the holding valve a two-path master cylinder, wherein the dual-path master cylinder allows substantially unrestricted fluid return flow to the pressure chamber. 2. The retention valve comprises a valve member made of an elastic material that is pressed against a seat formed at the outlet of the pressure chamber by a suitably set spring, and the valve member extends toward the pressure chamber. characterized in that it has an axial passageway obstructed by beak-shaped lips, said lips being able to move away from each other to allow substantially unrestricted flow of fluid back into said pressure chamber. A dual-system master cylinder according to claim 1.
JP703780A 1979-01-26 1980-01-25 Twoosystem master cylinder Granted JPS55102762A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7902069A FR2447305A1 (en) 1979-01-26 1979-01-26 Double chamber brake master cylinder - is for pressure difference in chamber with loaded valve to give free brake fluid return

Publications (2)

Publication Number Publication Date
JPS55102762A JPS55102762A (en) 1980-08-06
JPS6345337B2 true JPS6345337B2 (en) 1988-09-08

Family

ID=9221262

Family Applications (1)

Application Number Title Priority Date Filing Date
JP703780A Granted JPS55102762A (en) 1979-01-26 1980-01-25 Twoosystem master cylinder

Country Status (2)

Country Link
JP (1) JPS55102762A (en)
FR (1) FR2447305A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2496027B1 (en) * 1980-12-11 1985-06-07 Dba DRUM BRAKE WITH REGULATED TORQUE AND TORQUE REGULATING VALVE FOR SUCH A BRAKE
AU556422B2 (en) * 1981-07-08 1986-11-06 Societe Anonyme D.B.A. Pressurising brake systems
FR2509244A1 (en) * 1981-07-08 1983-01-14 Dba Temporary restraint of brake system pressure retention valve - by using support or adhesive sensitive to immersion in brake fluid

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5014981A (en) * 1973-06-12 1975-02-17

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH235420A (en) * 1942-08-17 1944-11-30 Teves Maschinen & Armaturenfab Bottom valve on pressure cylinders with piston return spring, in particular for motor vehicle brakes.
US3003319A (en) * 1959-10-28 1961-10-10 Gen Motors Corp Hydraulic actuating system
DE1220273B (en) * 1959-11-14 1966-06-30 Autobrzdy Jablonec Narodni Pod Bottom valve, especially for the master cylinder of a hydraulic brake system for motor vehicles
US3155110A (en) * 1962-12-03 1964-11-03 Vernay Laboratories Rubber check and relief valve
US3159176A (en) * 1962-12-07 1964-12-01 Vernay Laboratories Check-relief valve
JPS5623181Y2 (en) * 1977-04-12 1981-05-30

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5014981A (en) * 1973-06-12 1975-02-17

Also Published As

Publication number Publication date
FR2447305B1 (en) 1982-08-20
FR2447305A1 (en) 1980-08-22
JPS55102762A (en) 1980-08-06

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