GB2449216A - Trailer braking system - Google Patents

Trailer braking system Download PDF

Info

Publication number
GB2449216A
GB2449216A GB0704746A GB0704746A GB2449216A GB 2449216 A GB2449216 A GB 2449216A GB 0704746 A GB0704746 A GB 0704746A GB 0704746 A GB0704746 A GB 0704746A GB 2449216 A GB2449216 A GB 2449216A
Authority
GB
United Kingdom
Prior art keywords
brake
pressure
axle
braking
brake pressure
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Withdrawn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
GB0704746A
Other versions
GB0704746D0 (en
Inventor
Colin Ross
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.)
Knorr Bremse Systeme fuer Schienenfahrzeuge GmbH
Knorr Bremse Systems for Commercial Vehicles Ltd
Original Assignee
Knorr Bremse Systeme fuer Schienenfahrzeuge GmbH
Knorr Bremse Systems for Commercial Vehicles Ltd
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 Knorr Bremse Systeme fuer Schienenfahrzeuge GmbH, Knorr Bremse Systems for Commercial Vehicles Ltd filed Critical Knorr Bremse Systeme fuer Schienenfahrzeuge GmbH
Priority to GB0704746A priority Critical patent/GB2449216A/en
Publication of GB0704746D0 publication Critical patent/GB0704746D0/en
Priority to PCT/GB2008/000866 priority patent/WO2008110797A1/en
Priority to EP08718708A priority patent/EP2121396A1/en
Publication of GB2449216A publication Critical patent/GB2449216A/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Withdrawn legal-status Critical Current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
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/1701—Braking or traction control means specially adapted for particular types of vehicles
    • B60T8/1708—Braking or traction control means specially adapted for particular types of vehicles for lorries or tractor-trailer combinations
    • 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
    • B60T13/66—Electrical control in fluid-pressure brake 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
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • B60T8/176—Brake regulation specially adapted to prevent excessive wheel slip during vehicle deceleration, e.g. ABS
    • B60T8/1766—Proportioning of brake forces according to vehicle axle loads, e.g. front to rear of vehicle
    • 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
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/18—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle weight or load, e.g. load distribution
    • B60T8/1887—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to vehicle weight or load, e.g. load distribution especially adapted for tractor-trailer combinations
    • 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
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/26—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels
    • 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
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/26—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels
    • B60T8/266—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force characterised by producing differential braking between front and rear wheels using valves or actuators with external control means
    • 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
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/321—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration deceleration
    • B60T8/323—Systems specially adapted for tractor-trailer combinations

Landscapes

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

Abstract

A braking system for a trailer for a motor vehicle, the braking system comprising brake cylinders 18-21 for the front axle and a rear axle trailer, brake pressure into the brake cylinders being controllable by a brake pressure control module 13. The system further comprises transducers to measure the brake pressure on the front and the rear axles, such that, in use, the brake pressure control module 13 is adapted to decrease the brake pressure on the front axle and increase the pressure on the rear such that the sum of the brake forces on the front and rear axles remains substantially constant.

Description

Trailer Braking Systems The invention relates to a braking system for
trailers of commercial or utility vehicles.
EPI4 14684 discloses a trailer braking system for a trailer having steerable wheels, which has a single common ABS valve to control the brake pressure to the wheels of the front axle. The ABS valve is controlled by an electronic braking module associated with the rear axle of the trailer in dependence on the differential slip between the front and rear axles.
Trailers of this design suffer from the problem that due to load transfer the brake force generated on the front axle is higher than on the rear axle as it is necessary to install larger brake chambers on the front axle to minimise stopping distance at high brake demands. This in turn leads to a further problem. In most driving situations, braking is carried out in the low pressure range but the differential brake actuation leads to differential brake lining wear, which ultimately can cause overheating of the front axle brakes. The standard approach to deal with this problem is to install special valves in the case of trailers with a conventional braking system or in the case of electronic control utilise a specific control algorithm. This is usually referred to as brake force equalisation.
The present invention seeks to provide a braking system for a trailer having different brake pressure modulators for the front and rear axles.
According to the invention there is provided a braking system for a trailer for a motor vehicle having a steerable front axle, the braking system comprising brake cylinders for the front axle and a rear axle trailer, brake pressure into the brake cylinders being controllable by a brake pressure control means, the system further comprising brake pressure sensing means adapted to measure the brake pressure on the front and the rear axles, wherein, in use, the brake pressure control means is adapted to control the front and rear braking pressures so that the braking forces generated on the front and rear axles remains substantially equal.
Preferably, the brake pressure on the front axle is reduced and the brake pressure on the rear axle is increased to compensate for the different size of brake chambers.
Preferably, the brake pressures are manipulated until the brake demand pressure reaches a predetermined pressure. Preferably, the predetermined pressure is in the range up to 2.5 bar. Preferably, a transducer is provided to determine the load on the front axle and the brake pressure on the front axle is adjusted in dependence on the output of the transducer. Alternatively, the load on the rear axle may be determined, wherein when a brake demand is made, the brake pressure on the rear axle is adjusted in dependence on the load and generates a wheel slip, wherein the slip on the front and rear axles is adjusted so that the slip is substantially the same such that the difference in braking force at the front and rear axle can be determined, which braking force can then be adjusted.
Therefore in contrast to known systems which should be properly categorised as brake lining wear equalisation systems, the invention provides for brake force equalization for a given demand and load condition.
Exemplaiy embodiments of the invention will now be described in greater detail with reference to the drawings in which: Fig. 1 shows a trailer braking system; Fig. 2 shows a graph of brake force distribution v brake pressure; Fig. 3 shows characteristics of the brake force.
Figure 1 shows a trailer electronic braking system in which the utility vehicle trailer has a steerable front axle with front wheels 1, 2 and a rear axle with rear wheels 3, 4.
Rotational wheel speed sensors 5 8 are in each case assigned to the front wheels 1, 2 and the rear wheels 3, 4, and are connected by way of electric lines 9 12 with an electropneumatic brake pressure control module 13 (EBS module) which is primarily assigned to the rear axle brakes. One brake 14-17 is in each case assigned to the front wheels 1, 2 and the rear wheels 3, 4, which brake 14-17 can be applied by means of brake cylinders 18, 19 of the front axle or spring-loaded brake cylinders 20, 21 of the rear axle.
The braking system of the trailer vehicle can be connected by way of three connections, specifically a pneumatic supply line connection 22, a pneumatic control line connection 23 and an electric control connection 24, with the braking system of a tractor or a iiirther trailer.
The supply line connection 22 is connected by way filter 25 and a parking valve 26 with an air brake reservoir 27. From the air brake reservoir 27, a pneumatic line 28 leads to a supply input of the pressure control module 13. In addition, a pneumatic line 29 branches off the parking valve 26 to the pressure control module 13. A pneumatic line 30 extending between the parking valve 26 and the air brake reservoir 27 is connected with a supply input 31 of an pressure control module 32.
The pressure control module 32 is assigned jointly to both brake cylinders 18, 19 of the front axle and is connected with the brake cylinder 18 by way of a pneumatic line 33 and with the brake cylinder 19 by way of a pneumatic line 34. The pressure control module 32 has an ECU 50 which is connected by way of electric line 35 with the pressure control module 13.
Furthermore, the pressure control module 32 has a pneumatic control input 36 which is connected by way of a filter 37 with the pneumatic control connection 23. The pneumatic control input 36 is also connected by way of a pneumatic control line 38 with a pneumatic control input of the pressure control module 13. The pressure control module 13 has an integrated pressure sensor (not shown) which measures the pressure in the pneumatic control line 38, that is, the control pressure present at the pneumatic control input 36 of the pressure modulating valve. The pressure control module ECU is provided with an integrated pressure sensor so that the actual brake pressure in the brake cylinders 18, 19 is known.
The pressure control module 13 has pneumatic outputs 39 42 which are connected by way of assigned pneumatic lines with the spring brake cylinders 20 or 21.
Furthermore, air springs 43 44 are provided at the rear axle and permit a determination of the axle load, particularly of the dynamic axle load during braking and starting by means of a pressure transducer. One or more of the air springs 43, 44 is connected by way of a pneumatic line with the pressure control module 13 which is shown here only as an example by means of the pneumatic line 55. A pressure transducer being optionally integrated into the pressure control module 13 as a means of transposing the air spring pressure into a load measurement. Correspondingly air springs 45, 46 are provided at the front axle, a pressure transducer 47 measures the pressure and transmits the value via electric line 48 to the pressure modulating module 32. This information is transmitted to the pressure control module 13 via electric line 35.
During a braking operation, the driver defines a braking demand signal by way of the brake pedal and the pneumatic control line as well as the electrical control line. The brake pressure control module 13 controls pressures to the brake cylinders 20, 21 and subsequently monitors the speed of the wheels 3, 4.. A braking demand is transmitted via the electric line 35 to the pressure control module 32 which subsequently controls the pressure at the brake cylinders 18, 19. Wheel speeds from wheels 1, 2 are transmitted from the pressure control module via electric line 35 to the pressure control module 13. Relative front to rear pressure control can then be realised from predefined load to pressure parameters or via the respective wheel slip generated by the respective braking forces.
In a first embodiment according to the invention, the load on the front axle is measured by a transducer 47 adapted to measure the output of the air springs 45, 46 at the front axle and pass this information to the pressure control module 13 by way of the communication means 35. The air springs 43,44 for the rear axle provide information on the loading of the rear axle.
Figure 2 shows the brake force distribution without any equalization where the load on the front axle is initially the same as on the rear axle. Due to load transfer to the front axle the brake force generated at the front axle is higher than on the rear axle, which is generally acceptable for high decelerations to minimise stopping distance.
However for 99% of service braking, the brake pressure will be below 2 bar, and generally in the region of 1.2-1.4 bar. As Figure 2 illustrates, this will lead to a non symmetrical brake distribution leading to uneven brake lining wear which can then lead to overheating.
In accordance with the invention the pressure control module 13 is adapted to control the brake pressure at the front and rear axles so that whilst the overall braking force remains the same, the brake force is equalised between the front and rear axles in particular at the pressures used for normal servicing braking. Therefore at pressures up to about 2.5 bar, the pressure control module 13 will increase the brake pressure at the rear axle and correspondingly decrease the brake pressure at the front axle so that the resultant braking forces are substantially equal but the combined braking forces remains the same. This function is illustrated in Figure 3.
Once the brake pressure demand increases above 2.5 bar, the pressure control module allows the pressure at the front axle to be greater than the pressure at the rear axle as pressures above 2.5 bar are typically associated with high decelerations where the instantaneous lining wear is of less importance as this condition does not occur often.
As Figure 3 shows, the system permits two performance lines that diverge as brake demand increases and the sum of the two give the combined trailer braking force, which remains substantially constant irrespective of the manipulation of the pressure on the front and rear axles.
In a second alternative embodiment, slip control is used to obviate the need for an additional transducer 47 and electric line 48 at the front axle as this does not require any load information from the from axle.
In this embodiment the load characteristics of the rear axle are defined and used as a datum for any given demand and load condition. When the driver makes a brake demand the rear axle generates a brake chamber pressure associated with the predefined pressure load relationship which in turn generates a wheel slip. The brake pressure on the front axle is then increased by the pressure control module 13 so that the speed of the front wheels 1,2 is the same as the rear wheels 3,4 thereby equalising the braking rate.
Under certain load conditions, equal braking rate will not lead to equal brake force.
However, once the equal braking rate is established, the pressure control module 13 can determine the brake pressure at the brake valve 32. This information can then be used to determine the difference in braking pressure between the front and rear axles and then based on the known front to rear braking ratio the pressure at the front axle can then be decreased if necessary and the pressure at the rear axle increased if necessary to ensure that the braking force is substantially equal at both axles for service braking. For higher brake pressure such as in emergency braking the pressure at the front axle can be allowed to be higher than at the rear axle as shown in Figure 3.

Claims (7)

  1. Claims 1. A braking system for a trailer for a motor vehicle having a
    steerable front axle, the braking system comprising brake cylinders for the front axle and a rear axle trailer, brake pressure into the brake cylinders being controllable by a brake pressure control means, the system further comprising brake pressure sensing means adapted to measure the brake pressure on the front and the rear axles, wherein, in use, the brake pressure control means is adapted to decrease the brake pressure on the front axle and increase the pressure on the rear such that the sum of the brake forces on the front and rear axles remains substantially constant.
  2. 2. A braking system according to Claim 1, wherein the brake pressure on the front axle is increased and the brake pressure on the rear axle is reduced until the front and rear braking forces are substantially equally.
  3. 3. A braking system according to Claim 1 or Claim 2, wherein the brake pressures are manipulated until the brake demand pressure reaches a predetermined pressure.
  4. 4. A brake system according to Claim 3, wherein the predetermined pressure is in the range up to 2.5 bar.
  5. 5. A brake system according to any one of Claims I to 4, wherein a transducer is provided to determine the load on the front axle and the brake pressure on the front axle is adjusted in dependence on the output of the transducer.
  6. 6. A brake system according to any one of Claims 1 to 4, wherein the load on the rear axle is determined, wherein when a brake demand is made, the brake pressure on the rear axle is adjusted in dependence on the load and generates a wheel slip, wherein the slip on the front and rear axles is adjusted so that the slip is substantially the same such that the difference in braking force at the front and rear axle can be determined, which braking force can then be adjusted.
  7. 7. A brake system substantially as describe herein with reference to, and as illustrated in, the accompanying drawings.
GB0704746A 2007-03-12 2007-03-12 Trailer braking system Withdrawn GB2449216A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB0704746A GB2449216A (en) 2007-03-12 2007-03-12 Trailer braking system
PCT/GB2008/000866 WO2008110797A1 (en) 2007-03-12 2008-03-12 Trailer braking systems
EP08718708A EP2121396A1 (en) 2007-03-12 2008-03-12 Trailer braking systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0704746A GB2449216A (en) 2007-03-12 2007-03-12 Trailer braking system

Publications (2)

Publication Number Publication Date
GB0704746D0 GB0704746D0 (en) 2007-04-18
GB2449216A true GB2449216A (en) 2008-11-19

Family

ID=37988826

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0704746A Withdrawn GB2449216A (en) 2007-03-12 2007-03-12 Trailer braking system

Country Status (3)

Country Link
EP (1) EP2121396A1 (en)
GB (1) GB2449216A (en)
WO (1) WO2008110797A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013021681A1 (en) * 2013-12-19 2015-06-25 Wabco Gmbh Electropneumatic brake system for a trailer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114954399B (en) * 2022-06-14 2023-08-18 安徽江淮汽车集团股份有限公司 Automobile braking system and automobile

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB707372A (en) * 1949-01-12 1954-04-14 Gyreacta Transmissions Ltd Improvements in and relating to braking systems of road vehicles
GB2199099A (en) * 1986-12-17 1988-06-29 Teves Gmbh Alfred Brake system for automotive vehicles
EP1414684A1 (en) * 2001-07-30 2004-05-06 KNORR-BREMSE SYSTEME FÜR NUTZFAHRZEUGE GmbH Braking system for trailers of utility vehicles
EP1721796A2 (en) * 2005-04-29 2006-11-15 Kelsey-Hayes Company Pressure boost for vehicle rear brake circuits

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2622746A1 (en) * 1976-05-21 1977-11-24 Wabco Westinghouse Gmbh DEVICE FOR BRAKING FORCE CONTROL OF MOTOR VEHICLES
US4768840A (en) * 1987-04-27 1988-09-06 Eaton Corporation Brake control system and method
US5312168A (en) * 1993-08-31 1994-05-17 Eaton Corporation Method and apparatus for equalizing vehicle brake wear
DE19804465C1 (en) * 1998-02-05 1999-09-02 Daimler Chrysler Ag Device for controlling the brake force distribution in a three- or multi-axle vehicle
DE19958324A1 (en) * 1999-12-03 2001-06-07 Wabco Gmbh & Co Ohg Method for braking a vehicle
DE10219067A1 (en) * 2002-04-29 2003-11-20 Wabco Gmbh & Co Ohg Method and arrangement for applying brake energy in electronically controlled braking systems of vehicles
DE10335616B4 (en) * 2003-08-04 2006-06-14 Lucas Automotive Gmbh Low-noise vehicle brake system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB707372A (en) * 1949-01-12 1954-04-14 Gyreacta Transmissions Ltd Improvements in and relating to braking systems of road vehicles
GB2199099A (en) * 1986-12-17 1988-06-29 Teves Gmbh Alfred Brake system for automotive vehicles
EP1414684A1 (en) * 2001-07-30 2004-05-06 KNORR-BREMSE SYSTEME FÜR NUTZFAHRZEUGE GmbH Braking system for trailers of utility vehicles
EP1721796A2 (en) * 2005-04-29 2006-11-15 Kelsey-Hayes Company Pressure boost for vehicle rear brake circuits

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013021681A1 (en) * 2013-12-19 2015-06-25 Wabco Gmbh Electropneumatic brake system for a trailer
US9333955B2 (en) 2013-12-19 2016-05-10 Wabco Gmbh Electropneumatic brake system for a towed vehicle

Also Published As

Publication number Publication date
WO2008110797A1 (en) 2008-09-18
EP2121396A1 (en) 2009-11-25
GB0704746D0 (en) 2007-04-18

Similar Documents

Publication Publication Date Title
US8267485B2 (en) Electronic braking system and method for drawbar trailers
US5588716A (en) Method and device for electronically controlling the brake system of a vehicle
AU600215B2 (en) Tractor-trailer brake control system
US7925409B2 (en) Trailer electronic braking system
CA1323083C (en) Brake control system
US9315179B2 (en) Method for controlling a brake system of a vehicle with an electronically rgulated rear-axle brake circuit and an pneumatically controlled front-axle brake circuit
US11247649B2 (en) Method for decelerating a vehicle combination and combination of pneumatic brake systems of the vehicles of a vehicle combination
US6934618B2 (en) System and method for monitoring brake overload in electronically-controlled brake systems of vehicles and vehicle combinations
US9327695B2 (en) Method and device for the electronic control of the brake force distribution according to the differential slip
AU2002336937B2 (en) Braking system for trailers of utility vehicles
CA1327844C (en) Tractor-trailer brake control system
US10625719B2 (en) Method for adjusting brake pressures on pneumatically actuated wheel brakes of a vehicle, brake system for carrying out the method, and vehicle
JP3116314B2 (en) Vehicle with trailing axle that can be raised and lowered
CA2874659C (en) Electropneumatic brake system for a towed vehicle
US11059467B2 (en) Braking force control apparatus for vehicle
WO2020076748A1 (en) System and method for controlling compounding in a brake actuator
CN101962011B (en) Vehicle ABS valve device with a pressure limit device capable of indirectly adjusting sliding rate on an axle
GB2449216A (en) Trailer braking system
EP3789255B1 (en) Brake system for commercial vehicle
Lindemann et al. EBS and tractor trailer brake compatibility
US20030130781A1 (en) Anti-lock braking system (ABS) for vehicles with an additional axle
JP5645341B2 (en) Equipment for influencing yaw moment
Reini et al. Designing a Next Generation Trailer Braking System
GB2621839A (en) Trailer brake control system

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)