FR2268674A1 - Pressure control valve for trailer pneumatic brakes - isolates trailer supply when trailer brake line broken, for hold-off brake operation - Google Patents

Pressure control valve for trailer pneumatic brakes - isolates trailer supply when trailer brake line broken, for hold-off brake operation

Info

Publication number
FR2268674A1
FR2268674A1 FR7512889A FR7512889A FR2268674A1 FR 2268674 A1 FR2268674 A1 FR 2268674A1 FR 7512889 A FR7512889 A FR 7512889A FR 7512889 A FR7512889 A FR 7512889A FR 2268674 A1 FR2268674 A1 FR 2268674A1
Authority
FR
France
Prior art keywords
trailer
brake
control valve
pressure control
hold
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
FR7512889A
Other languages
French (fr)
Other versions
FR2268674B1 (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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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
Priority claimed from DE19742419755 external-priority patent/DE2419755B2/en
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of FR2268674A1 publication Critical patent/FR2268674A1/en
Application granted granted Critical
Publication of FR2268674B1 publication Critical patent/FR2268674B1/fr
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
    • B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
    • B60T15/02—Application and release valves
    • B60T15/36—Other control devices or valves characterised by definite functions
    • B60T15/60—Other control devices or valves characterised by definite functions for releasing or applying brakes when vehicles of a vehicle train are uncoupled
    • 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
    • B60T13/24—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 gaseous
    • B60T13/26—Compressed-air systems
    • B60T13/261—Compressed-air systems systems with both indirect application and application by springs or weights and released by compressed air
    • B60T13/263—Compressed-air systems systems with both indirect application and application by springs or weights and released by compressed air specially adapted for coupling with dependent systems, e.g. tractor-trailer systems
    • 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
    • B60T15/00—Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups B60T11/00 or B60T13/00
    • B60T15/02—Application and release valves
    • B60T15/18—Triple or other relay valves which allow step-wise application or release and which are actuated by brake-pipe pressure variation to connect brake cylinders or equivalent to compressed air or vacuum source or atmosphere

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Braking Systems And Boosters (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Hydraulic Control Valves For Brake Systems (AREA)

Abstract

The supply line to the trailer pneumatic brakes is protected by a special pressure control valve which is spring loaded and is subjected to the pressures in the two braking systems, i.e. trailer and towing unit. In the event of a leak in the trailer brakes the valve closes so that the trailer brake pressure falls more rapidly than it would if supplied from the towing unit. This enables the automatic hold-off brake to operate rapidly. To increase the brake response, the control valve element can be coupled to a venting valve which vents the line of the trailer brakes. If the trailer is not coupled to the towing unit then the valve operates in any case and is thus prevented from seizing up through non-use and corrosion.
FR7512889A 1974-04-24 1975-04-24 Pressure control valve for trailer pneumatic brakes - isolates trailer supply when trailer brake line broken, for hold-off brake operation Granted FR2268674A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742419755 DE2419755B2 (en) 1975-05-09 1974-04-24 Monitoring valve for a multi-circuit dual-line brake system in trucks

Publications (2)

Publication Number Publication Date
FR2268674A1 true FR2268674A1 (en) 1975-11-21
FR2268674B1 FR2268674B1 (en) 1979-03-23

Family

ID=5913788

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7512889A Granted FR2268674A1 (en) 1974-04-24 1975-04-24 Pressure control valve for trailer pneumatic brakes - isolates trailer supply when trailer brake line broken, for hold-off brake operation

Country Status (2)

Country Link
AU (1) AU1288276A (en)
FR (1) FR2268674A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2330575A2 (en) * 1974-08-01 1977-06-03 Wabco Westinghouse Gmbh TRAILER BRAKE DEVICE
FR2341460A1 (en) * 1976-02-17 1977-09-16 Midland Ross Corp IMPROVEMENTS TO TRAILER BRAKE CONTROL SYSTEMS, MOUNTED ON THE TRACTOR VEHICLE
FR2399598A1 (en) * 1977-08-06 1979-03-02 Bosch Gmbh Robert Throttle valve for twin circuit trailer air brakes - has stepped piston to vent storage tank pressure and shorten braking time lag
EP2955073A1 (en) * 2014-05-30 2015-12-16 Studio Tecnico 6 M S.R.L. Device for the towing vehicle-trailer connection
EP3000631A1 (en) * 2014-05-30 2016-03-30 Studio Tecnico 6 M S.R.L. Device for the towing vehicle-trailer connection

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2330575A2 (en) * 1974-08-01 1977-06-03 Wabco Westinghouse Gmbh TRAILER BRAKE DEVICE
FR2341460A1 (en) * 1976-02-17 1977-09-16 Midland Ross Corp IMPROVEMENTS TO TRAILER BRAKE CONTROL SYSTEMS, MOUNTED ON THE TRACTOR VEHICLE
FR2399598A1 (en) * 1977-08-06 1979-03-02 Bosch Gmbh Robert Throttle valve for twin circuit trailer air brakes - has stepped piston to vent storage tank pressure and shorten braking time lag
EP2955073A1 (en) * 2014-05-30 2015-12-16 Studio Tecnico 6 M S.R.L. Device for the towing vehicle-trailer connection
EP3000631A1 (en) * 2014-05-30 2016-03-30 Studio Tecnico 6 M S.R.L. Device for the towing vehicle-trailer connection

Also Published As

Publication number Publication date
AU1288276A (en) 1977-10-13
FR2268674B1 (en) 1979-03-23

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Legal Events

Date Code Title Description
ST Notification of lapse