FR2401811A1 - Servo control for trailer brakes - has direct operation from master cylinder with control pressure inversely proportional to servo pressure to allow fine control - Google Patents

Servo control for trailer brakes - has direct operation from master cylinder with control pressure inversely proportional to servo pressure to allow fine control

Info

Publication number
FR2401811A1
FR2401811A1 FR7825268A FR7825268A FR2401811A1 FR 2401811 A1 FR2401811 A1 FR 2401811A1 FR 7825268 A FR7825268 A FR 7825268A FR 7825268 A FR7825268 A FR 7825268A FR 2401811 A1 FR2401811 A1 FR 2401811A1
Authority
FR
France
Prior art keywords
control
servo
pressure
inversely proportional
master cylinder
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.)
Withdrawn
Application number
FR7825268A
Other languages
French (fr)
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
Publication of FR2401811A1 publication Critical patent/FR2401811A1/en
Withdrawn legal-status Critical Current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
    • B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
    • B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
    • B60T13/12—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being liquid
    • B60T13/22—Brakes applied by springs or weights and released hydraulically

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Regulating Braking Force (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

The servo assisted brakes for the towing unit and trailer have a main master brake cylinder (16) operated on by the brake pedal (14) and the handbrake lever (15). The unit brakes (11) are operated directly from the master brake cylinder, which also has a connection (17) to the servo control valve (31). This links the servo pressure to the trailer brakes (21 to 24). The servo pressure is controlled by a control force inversely proportional to the available servo force to maintain a fine braking control.
FR7825268A 1977-09-01 1978-09-01 Servo control for trailer brakes - has direct operation from master cylinder with control pressure inversely proportional to servo pressure to allow fine control Withdrawn FR2401811A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3644777 1977-09-01

Publications (1)

Publication Number Publication Date
FR2401811A1 true FR2401811A1 (en) 1979-03-30

Family

ID=10388226

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7825268A Withdrawn FR2401811A1 (en) 1977-09-01 1978-09-01 Servo control for trailer brakes - has direct operation from master cylinder with control pressure inversely proportional to servo pressure to allow fine control

Country Status (3)

Country Link
JP (1) JPS5451737U (en)
DE (1) DE2837019A1 (en)
FR (1) FR2401811A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2523535A1 (en) * 1982-03-19 1983-09-23 Valeo Actuator for vehicle parking brake - comprises piston which selectively connects pressure source or reservoir to slave cylinder
IT201700051988A1 (en) * 2017-05-12 2018-11-12 Safim S P A BRAKING DEVICE
IT201700051983A1 (en) * 2017-05-12 2018-11-12 Safim S P A BRAKING DEVICE

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3628061A1 (en) * 1986-08-19 1988-03-03 Mak Maschinenbau Krupp Hydraulic or pneumatic brake control - uses two parallel valves, one connected to pressure source and other to return under no pressure
DE29613282U1 (en) * 1996-07-31 1997-03-20 Clark Material Handling Gmbh Vehicle with an electric drive motor, especially as an industrial truck

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1290277A (en) * 1961-03-01 1962-04-13 Renault Hydraulic brake control device for off-road vehicles and their trailers
FR2024140A1 (en) * 1968-11-25 1970-08-28 Steyr Daimler Puch Ag
FR2070913A1 (en) * 1969-12-18 1971-09-17 Massey Ferguson Sa
FR2185529A1 (en) * 1972-05-22 1974-01-04 Bendix Corp
US3863992A (en) * 1974-05-10 1975-02-04 Bendix Corp Inverting limiting relay valve with interlock
FR2241428A1 (en) * 1973-08-24 1975-03-21 Kelsey Hayes Co
FR2262244A1 (en) * 1974-02-25 1975-09-19 Caterpillar Tractor Co Safety air brake changeover cylinder - prevents contamination of air system by hydraulic oil

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1290277A (en) * 1961-03-01 1962-04-13 Renault Hydraulic brake control device for off-road vehicles and their trailers
FR2024140A1 (en) * 1968-11-25 1970-08-28 Steyr Daimler Puch Ag
FR2070913A1 (en) * 1969-12-18 1971-09-17 Massey Ferguson Sa
FR2185529A1 (en) * 1972-05-22 1974-01-04 Bendix Corp
FR2241428A1 (en) * 1973-08-24 1975-03-21 Kelsey Hayes Co
FR2262244A1 (en) * 1974-02-25 1975-09-19 Caterpillar Tractor Co Safety air brake changeover cylinder - prevents contamination of air system by hydraulic oil
US3863992A (en) * 1974-05-10 1975-02-04 Bendix Corp Inverting limiting relay valve with interlock

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2523535A1 (en) * 1982-03-19 1983-09-23 Valeo Actuator for vehicle parking brake - comprises piston which selectively connects pressure source or reservoir to slave cylinder
IT201700051988A1 (en) * 2017-05-12 2018-11-12 Safim S P A BRAKING DEVICE
IT201700051983A1 (en) * 2017-05-12 2018-11-12 Safim S P A BRAKING DEVICE
EP3401170A1 (en) * 2017-05-12 2018-11-14 SAFIM S.p.A. Braking device

Also Published As

Publication number Publication date
DE2837019A1 (en) 1979-03-15
JPS5451737U (en) 1979-04-10

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Legal Events

Date Code Title Description
ST Notification of lapse