GB2000236A - Hydraulic master cylinder - Google Patents

Hydraulic master cylinder

Info

Publication number
GB2000236A
GB2000236A GB7826480A GB7826480A GB2000236A GB 2000236 A GB2000236 A GB 2000236A GB 7826480 A GB7826480 A GB 7826480A GB 7826480 A GB7826480 A GB 7826480A GB 2000236 A GB2000236 A GB 2000236A
Authority
GB
United Kingdom
Prior art keywords
pressure
chamber
control
secondary chamber
brakes
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.)
Granted
Application number
GB7826480A
Other versions
GB2000236B (en
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.)
Automotive Products PLC
Original Assignee
Automotive Products PLC
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 Automotive Products PLC filed Critical Automotive Products PLC
Priority to GB7826480A priority Critical patent/GB2000236B/en
Publication of GB2000236A publication Critical patent/GB2000236A/en
Application granted granted Critical
Publication of GB2000236B publication Critical patent/GB2000236B/en
Expired 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
    • B60T11/16—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
    • B60T11/34—Pressure reducing or limiting valves

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

The invention relates to two piston (e.g. tandem) master cylinders for use in vehicle hydraulic braking systems. Whilst pressure is building up in the primary chamber 115 for applying one set of brakes, pressure in the secondary chamber 121 is prevented from increasing by virtue of a control piston 125 trapping hydraulic fluid in a control chamber 139. Valve means including a valve member 143, washer 144 and plunger 146 control pressure in the control chamber so that when a predetermined pressure in the primary chamber is reached the control chamber pressure starts to reduce and eventually becomes equal to the secondary chamber pressure. The master cylinder is for use in a split system having drum brakes connected to the primary chamber and disc brakes connected to the secondary chamber. Delaying the build up of secondary chamber pressure allows the effect of the usual drum brake pull-off springs to be overcome without causing undue wear of the disc brakes. <IMAGE>
GB7826480A 1977-06-17 1978-06-07 Hydraulic master cylinder Expired GB2000236B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7826480A GB2000236B (en) 1977-06-17 1978-06-07 Hydraulic master cylinder

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB2534277 1977-06-17
GB3475777 1977-08-18
GB7826480A GB2000236B (en) 1977-06-17 1978-06-07 Hydraulic master cylinder

Publications (2)

Publication Number Publication Date
GB2000236A true GB2000236A (en) 1979-01-04
GB2000236B GB2000236B (en) 1982-01-20

Family

ID=26257630

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7826480A Expired GB2000236B (en) 1977-06-17 1978-06-07 Hydraulic master cylinder

Country Status (1)

Country Link
GB (1) GB2000236B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0041451A1 (en) * 1980-06-02 1981-12-09 The Bendix Corporation Master cylinder with fast fill auxiliary chamber

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1061352A (en) * 1964-01-30 1967-03-08 Kelsey Hayes Co Brake pressure proportioning device
GB1316925A (en) * 1970-08-05 1973-05-16 Bendix Corp Pressure metering valve for vehicle braking systems

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1061352A (en) * 1964-01-30 1967-03-08 Kelsey Hayes Co Brake pressure proportioning device
GB1316925A (en) * 1970-08-05 1973-05-16 Bendix Corp Pressure metering valve for vehicle braking systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0041451A1 (en) * 1980-06-02 1981-12-09 The Bendix Corporation Master cylinder with fast fill auxiliary chamber

Also Published As

Publication number Publication date
GB2000236B (en) 1982-01-20

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee