GB1344242A - Brake system for the trailer of a tractor-trailer combination or for a semi-trailer - Google Patents

Brake system for the trailer of a tractor-trailer combination or for a semi-trailer

Info

Publication number
GB1344242A
GB1344242A GB855072A GB855072A GB1344242A GB 1344242 A GB1344242 A GB 1344242A GB 855072 A GB855072 A GB 855072A GB 855072 A GB855072 A GB 855072A GB 1344242 A GB1344242 A GB 1344242A
Authority
GB
United Kingdom
Prior art keywords
brake
pressure
valve
braking
hydrodynamic
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
GB855072A
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.)
Continental Teves AG and Co oHG
Original Assignee
Alfred Teves 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
Application filed by Alfred Teves GmbH filed Critical Alfred Teves GmbH
Publication of GB1344242A publication Critical patent/GB1344242A/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
    • B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
    • B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
    • B60T1/08—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels using fluid or powdered medium
    • B60T1/087—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels using fluid or powdered medium in hydrodynamic, i.e. non-positive displacement, retarders
    • 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
    • B60T13/585—Combined or convertible systems comprising friction brakes and retarders

Landscapes

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

Abstract

1344242 Tractor trailer braking systems; hydrodynamic brakes ALFRED TEVES GmbH 24 Feb 1972 [26 Feb 1971] 8550/72 Headings F2F and F2E A braking arrangement on a trailer or semitrailer of a tractor-trailer combination is actuable upon actuation of the tractor service brake or a continuous engine compression brake of the tractor and comprises both a friction brake system and a hydrodynamic brake system including a hydrodynamic brake 11, a loading cylinder 13, a compressed air tank 10 and a relay valve 12 which is arranged between the loading cylinder 13 and the compressed air tank 10 and is controllable by an axle-load-dependent brakeforce-distributer 16. As shown in Fig. 1, the friction braking system includes wheel brake cylinders 6 supplied with pressure from a tank 3 via a trailer brake control valve 2 and a brake-force-control device 8. The tank 3 is connected to tank 10 via an overflow valve 9. A solenoid valve 14 operable simultaneously with the engine compression brake by means of an exciter circuit 17, 21 is connected in a line between the tank 3 and the distributer 16, and a pressure-medium-operated switch 20 is connected in the exciter circuit 17, 21 and also in the line leading from control valve 2 to the front or back brake cylinder 6 so that the switch 20 opens upon actuation of the friction braking system to a predetermined pressure to prevent simultaneous actuation of the friction and the hydrodynamic brakes. To initiate continuous braking the driver operates the tractor engine compression brake so that the valve 14 is operated to connect the tank 3 to the distributer 16 which controls the relay valve 12 to bring about hydrodynamic braking in dependence on the axle load. In the embodiment of Fig. 2, the hydrodynamic brake may be used as an additional preliminary brake during service braking. To this end, the arrangement further comprises a second solenoid valve 24 which is closed upon actuation of the tractor service brake whereby pressure is directed to a pressure reducing valve 37, and a valve 16<SP>1</SP> and thence to the valve 16 to actuate preliminary hydrodynamic braking. Pressure is also built up from the tank 10 via connections 30, 28 to respective pressure retaining valves 22, 23 in each of the brake lines 4, 5 leading to the brake cylinders 6 of the front and rear axles, and a further pressure builds up from the connection 32 of the solenoid valve 24 to a control valve 35 which is connected to the pressure retaining valve 23 so that the braking pressure at the rear axle can attain only half the value of the braking pressure at the front axle. When the control pressure reaches a value sufficient to overcome the retaining pressure (say 3 kg/cm<SP>2</SP> gauge) in valves 22, 23 the service brakes will be brought into operation, and the pressure in the loading cylinder 13 will then be at the maximum control pressure. The exciter circuit 25 of the solenoid valve 24 may be broken by a tumbler switch to prevent preliminary hydrodynamic braking.
GB855072A 1971-02-26 1972-02-24 Brake system for the trailer of a tractor-trailer combination or for a semi-trailer Expired GB1344242A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712109137 DE2109137B2 (en) 1971-02-26 1971-02-26 BRAKE SYSTEM FOR THE TRAILER OF A TOWING VEHICLE

Publications (1)

Publication Number Publication Date
GB1344242A true GB1344242A (en) 1974-01-16

Family

ID=5799881

Family Applications (1)

Application Number Title Priority Date Filing Date
GB855072A Expired GB1344242A (en) 1971-02-26 1972-02-24 Brake system for the trailer of a tractor-trailer combination or for a semi-trailer

Country Status (4)

Country Link
DE (1) DE2109137B2 (en)
GB (1) GB1344242A (en)
IT (1) IT947594B (en)
SE (1) SE382596B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2244771A (en) * 1990-04-27 1991-12-11 Akebono Brake Ind Braking rear wheels of a vehicle

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112576658B (en) * 2020-12-18 2022-06-10 陕西法士特齿轮有限责任公司 Air path control system and control method of AMT brake

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2244771A (en) * 1990-04-27 1991-12-11 Akebono Brake Ind Braking rear wheels of a vehicle
US5141086A (en) * 1990-04-27 1992-08-25 Akebono Brake Industry Co., Ltd. Controller for rear brakes
GB2244771B (en) * 1990-04-27 1994-08-10 Akebono Brake Ind Controller for rear brakes

Also Published As

Publication number Publication date
IT947594B (en) 1973-05-30
DE2109137A1 (en) 1972-08-31
SE382596B (en) 1976-02-09
DE2109137B2 (en) 1976-06-24

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Legal Events

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