GB1294987A - - Google Patents

Info

Publication number
GB1294987A
GB1294987A GB5284870A GB5284870A GB1294987A GB 1294987 A GB1294987 A GB 1294987A GB 5284870 A GB5284870 A GB 5284870A GB 5284870 A GB5284870 A GB 5284870A GB 1294987 A GB1294987 A GB 1294987A
Authority
GB
United Kingdom
Prior art keywords
valve
brake
relay
pipe
circuits
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
GB5284870A
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 filed Critical
Publication of GB1294987A publication Critical patent/GB1294987A/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
    • 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
    • B60T13/36—Compressed-air systems direct, i.e. brakes applied directly by compressed air
    • 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
    • B60T13/40—Compressed-air systems indirect, i.e. compressed air booster units indirect 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
    • 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
    • B60T13/58—Combined or convertible systems
    • B60T13/62—Combined or convertible systems both straight and automatic
    • 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
    • B60T15/20—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 controlled by two fluid pressures
    • 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
    • B60T15/24—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 controlled by three fluid pressures

Landscapes

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

Abstract

1294987 Valves; dual circuit brake systems WESTINGHOUSE BREMSEN UND APPARATEBAU GmbH 6 Nov 1970 [22 Nov 1969] 52848/70 Headings F2F and F2V A tractor dual-circuit braking system incorporates a relay valve 11 which serves as a trailer brake valve and acts to control the pressure in a trailer direct brake pipe 18 in response to pressure changes in the two circuits I, II of the tractor braking system. As shown in Fig. 2, the relay valve 11 has connections 36, 41 for pipes 12, 13 of the circuits I and II: connection 36 communicates via holes 37, 38 with chambers 39, 40, respectively, above a relay piston 20 and connection 41 communicates via a hole 42 with a chamber 43 below a relay piston 21. The two relay pistons 20, 21 are coaxial and include respective seats 22, 29 which co-operate with valve cones 33, 34 of a double valve body 32 to form an inlet valve 22, 33 and an outlet valve 29, 34. A pipe 14 leading to a storage tank 5 of the brake circuit II is connected to the valve 11 at a union 44 and communicates via holes 45, 46 with a chamber 47 and a pipe 15 leading to the trailer brake pipe 18 is connected to the valve 11 at a union 50 which communicates via a hole 49 with a chamber 48. When a tractor brake valve 3 is actuated compressed air flows from storage tanks 2 and 5 into brake cylinders 4, 4<SP>1</SP> associated with the front and rear axles of the tractor respectively. The pressures in the two circuits I, II being introduced into the chambers 39, 40 and 43, respectively, act to move the relay pistons 20, 21 slidably axially towards one another. As a result the outlet valve 29, 34 closes and the inlet valve 22, 33 opens and the storage tank 5 is thereby connected to the line 18 via a line 6, a pressure control valve 7, a line 14 and chambers 47, 48 of the valve 11. The inlet valve 22, 33 opens until the forces acting on the relay pistons 20, 21 are in equilibrium whereupon the double valve 22, 33 and 29, 34 comes into the lap position. If one of the brake circuits is not pressurized the pressure in the other circuit will still cause the valve 11 to operate. A pipe 10 serves as an automatic trailer brake pipe which when broken causes the trailer to be braked and if this occurs while the tractor brake is actuated the outlet valve 29, 34 remains closed and the inlet valve 22, 33 remains open to evacuate the pipe 18 via the inlet valve 22, 23 and the pipe 14. In the relay valve 11 of Fig. 3 a relay piston 54 is in two sections 60, 61 and an advance is achieved in the trailer brake as compared with the towing vehicle brake. A compression spring 62 acts on the piston section 61 and the initial compression of the spring 62 may be altered by means of an adjusting screw 65. An inlet valve 56, 68 and an outlet valve 66, 69 are provided which are respectively opened and closed in actuation of the valve 11 by the pressure in either or both circuits I, II. The arrangement is such that a steep pressure rise occurs in a chamber 80 to bring about the aforesaid advance.
GB5284870A 1969-11-22 1970-11-06 Expired GB1294987A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1958808A DE1958808B2 (en) 1969-11-22 1969-11-22 Relay valve for use as a trailer brake valve for dual-circuit air brake systems in road vehicles

Publications (1)

Publication Number Publication Date
GB1294987A true GB1294987A (en) 1972-11-01

Family

ID=5751834

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5284870A Expired GB1294987A (en) 1969-11-22 1970-11-06

Country Status (10)

Country Link
AT (1) AT313090B (en)
CH (1) CH515812A (en)
DE (1) DE1958808B2 (en)
ES (1) ES196612Y (en)
GB (1) GB1294987A (en)
NL (1) NL7017017A (en)
PL (1) PL71949B1 (en)
SE (1) SE379178B (en)
SU (1) SU682114A3 (en)
YU (1) YU32583B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0064357A1 (en) * 1981-05-01 1982-11-10 Bendix Limited Relay valves with output pressure predominance

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2139213C3 (en) * 1971-08-05 1982-11-25 Wabco Fahrzeugbremsen Gmbh, 3000 Hannover Dual-line multi-circuit brake system for trailers
DE2246242C2 (en) * 1972-09-21 1983-10-13 Robert Bosch Gmbh, 7000 Stuttgart Trailer control valve for dual-circuit air brake systems
DE2646288B2 (en) * 1976-10-14 1979-09-27 Wabco Fahrzeugbremsen Gmbh, 3000 Hannover Load-dependent braking force control device
DE3033621A1 (en) * 1980-09-06 1982-04-29 Robert Bosch Gmbh, 7000 Stuttgart CONTROL VALVE FOR AIR BRAKE SYSTEMS
DE3210027A1 (en) * 1982-03-19 1983-09-22 Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover BRAKE PRESSURE CONTROL VALVE
DE3229836C2 (en) * 1982-08-11 1985-01-24 Graubremse Gmbh, 6900 Heidelberg Trailer control valve that can be controlled via two circuits, especially for compressed air brake systems on motor vehicles
DE3407350A1 (en) * 1984-02-29 1985-08-29 Alfred Teves Gmbh, 6000 Frankfurt VACUUM-POWERED BRAKE-AMPLIFIER
DE3409303A1 (en) * 1984-03-14 1985-09-26 Graubremse Gmbh, 6900 Heidelberg Relay valve with pressure relief, insertable between handbrake valve and spring-loaded brake cylinder
DE3526048A1 (en) * 1985-07-20 1987-01-22 Bosch Gmbh Robert Trailer control valve
DE3615002A1 (en) * 1986-05-02 1987-11-05 Wabco Westinghouse Fahrzeug DEVICE FOR CONTROLLING THE BRAKE PRESSURE
DE4226697C1 (en) * 1992-08-12 1993-09-23 Grau Gmbh, 69123 Heidelberg, De

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0064357A1 (en) * 1981-05-01 1982-11-10 Bendix Limited Relay valves with output pressure predominance

Also Published As

Publication number Publication date
SE379178B (en) 1975-09-29
ES196612Y (en) 1975-08-01
ES196612U (en) 1975-04-01
PL71949B1 (en) 1974-06-29
DE1958808A1 (en) 1971-06-09
CH515812A (en) 1971-11-30
NL7017017A (en) 1971-05-25
DE1958808B2 (en) 1973-11-29
SU682114A3 (en) 1979-08-25
AT313090B (en) 1974-01-25
YU284670A (en) 1974-08-31
YU32583B (en) 1975-02-28

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years