GB1127072A - Improvements in and relating to fluid pressure braking systems for vehicles - Google Patents

Improvements in and relating to fluid pressure braking systems for vehicles

Info

Publication number
GB1127072A
GB1127072A GB3975465A GB3975465A GB1127072A GB 1127072 A GB1127072 A GB 1127072A GB 3975465 A GB3975465 A GB 3975465A GB 3975465 A GB3975465 A GB 3975465A GB 1127072 A GB1127072 A GB 1127072A
Authority
GB
United Kingdom
Prior art keywords
chamber
valves
valve
air
hydraulic
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
GB3975465A
Inventor
Leslie Cyril Chouings
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 GB3975465A priority Critical patent/GB1127072A/en
Priority to DE19661505328 priority patent/DE1505328A1/en
Priority to DE1966A0026395 priority patent/DE1950115U/en
Publication of GB1127072A publication Critical patent/GB1127072A/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
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/08—Brake cylinders other than ultimate actuators
    • B60T17/10—Two or more cylinders acting on the same brake with means for rendering them effective selectively or successively, the number of effective cylinders being variable
    • 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
    • B60T11/24—Single initiating means operating on more than one circuit, e.g. dual circuits
    • 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
    • B60T13/241—Differential pressure systems
    • B60T13/246—The control valve is provided apart from the servomotor cylinder
    • B60T13/248—Mechanical command of the control valve, hydraulic transmission to the brakes
    • 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
    • B60T13/44—Compressed-air systems indirect, i.e. compressed air booster units indirect systems with two-chamber booster 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
    • 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
    • B60T13/581—Combined or convertible systems both hydraulic and pneumatic

Landscapes

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

Abstract

1,127,072. Fluid-pressure brakes. AUTOMOTIVE PRODUCTS CO. Ltd. 14 Sept., 1966 [17 Sept., 1965], No. 39754/65. Heading F2F. An hydraulic braking system for aroad vehicle, wherein there is provided a compressed-air servo, and which may be associated with a compressed-air trailer braking system, comprises dual hydraulic circuits 52, 61 supplying separate chambers 14, 15 of equal or approximately equal area in each of a set of brake cylinders 5-8, the circuits being fed by primary and secondary chambers 39, 48 of a tandem master cylinder 32, the primary piston 40 of which is actuated by a pair of air actuators 30, 31, or by a doublediaphragm actuator (Fig. 3, not shown), having a common output rod-34, control of the actuator(s) being by separate valves 64, .65 controlled by the pressure developed in a pedaloperated master cylinder 17 having separate reservoirs 26, 27 for the two hydraulic circuits, the latter supplying the circuit fed by the primary chamber 39 while the former supplies the circuit fed by the secondary chamber 48 via chamber 24 of the pedal-operated master cylinder. In the diagrammaticallyillustrated embodiment of Fig: 1, the pressure developed-in the pedal-operated master cylinder acts on a secondary piston 22 which in turn acts via a balance beam 76 on the stems 72 of the valves 64, 65, one of which can also be operated manually by handbrake lever 109. In the modification of Fig. 6, however, reaction pistons 134, 135 each comprising an hydraulic piston element 136 and a pneumatic piston element 137 exposed to hydraulic pressure in the chamber 24 and to pneumatic pressure delivered by the associated valve, respectively, are each provided with one valve seat 138 of a lapping valve assembly 138, 139, 141, rods 147 connected at their outer ends to a handbrake linkage engaging the pistons so that simultaneous manual application of the valves can also be effected. In both embodiments direct mechanical application of the valves can be effected in the event of failure of the hydraulic circuit including chamber 24, by contact of an extension rod 143 of the pedal-operated piston 19 engaging the secondary piston 22 or a bridging plate 144 contacting the reaction pistons 134, 135, respectively. The pneumatic system shown in Figure 1 includes three reservoirs 87, 88, 89 respectively supplying a trailer reservoir 91, via tractor protection valve 92 and relay / emergency valve 93, valve 64 and valve 65, the outputs of valves 64 and 65 supplying air circuits 103, 106 on the trailer in addition to the air actuators 30, 31 on the tractor. Circuit 103 feeds one chamber in each of the two-chamber, air brake actuators 78, 79 on the trailer wheels, by a direct connection,. circuit 106 feeding the other, chamber of each of these actuators. via the relay/emergency valve 93. Inertia valves 97, 101 associated, with. the reservoirs, 88, 89 cut off the. supply lines to. the valves 64, 65 when, a. predetermined deceleration is exceeded.
GB3975465A 1965-09-17 1965-09-17 Improvements in and relating to fluid pressure braking systems for vehicles Expired GB1127072A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB3975465A GB1127072A (en) 1965-09-17 1965-09-17 Improvements in and relating to fluid pressure braking systems for vehicles
DE19661505328 DE1505328A1 (en) 1965-09-17 1966-09-16 Pressure fluid brake system for vehicles
DE1966A0026395 DE1950115U (en) 1965-09-17 1966-09-16 COMPRESSED BRAKE SYSTEM FOR VEHICLES.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3975465A GB1127072A (en) 1965-09-17 1965-09-17 Improvements in and relating to fluid pressure braking systems for vehicles

Publications (1)

Publication Number Publication Date
GB1127072A true GB1127072A (en) 1968-09-11

Family

ID=10411302

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3975465A Expired GB1127072A (en) 1965-09-17 1965-09-17 Improvements in and relating to fluid pressure braking systems for vehicles

Country Status (2)

Country Link
DE (2) DE1950115U (en)
GB (1) GB1127072A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0310733A1 (en) * 1987-10-07 1989-04-12 BENDIX ITALIA S.p.A. Hydropneumatic actuator for automotive vehicles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0310733A1 (en) * 1987-10-07 1989-04-12 BENDIX ITALIA S.p.A. Hydropneumatic actuator for automotive vehicles

Also Published As

Publication number Publication date
DE1505328A1 (en) 1970-04-23
DE1950115U (en) 1966-11-17

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