GB2129079A - Improvements in or relating to brake systems for tractor vehicle and trailer combinations - Google Patents

Improvements in or relating to brake systems for tractor vehicle and trailer combinations Download PDF

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Publication number
GB2129079A
GB2129079A GB08328780A GB8328780A GB2129079A GB 2129079 A GB2129079 A GB 2129079A GB 08328780 A GB08328780 A GB 08328780A GB 8328780 A GB8328780 A GB 8328780A GB 2129079 A GB2129079 A GB 2129079A
Authority
GB
United Kingdom
Prior art keywords
brake
control
pressure
tractor vehicle
trailer
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
GB08328780A
Other versions
GB8328780D0 (en
GB2129079B (en
Inventor
Ingolf Grauel
Egbert Muller
Werner Stumpe
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
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB8328780D0 publication Critical patent/GB8328780D0/en
Publication of GB2129079A publication Critical patent/GB2129079A/en
Application granted granted Critical
Publication of GB2129079B publication Critical patent/GB2129079B/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
    • B60T17/18—Safety devices; Monitoring
    • 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
    • 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
    • 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
    • B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
    • B60T13/683—Electrical control in fluid-pressure brake systems by electrically-controlled valves in pneumatic systems or parts thereof
    • 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
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Regulating Braking Force (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

Multi-circuit brake actuation member (3) is constructed to control electrical and pressure-medium- operated circuits (III, I and II). A trailer brake control valve (9) is controlled by circuits I and II of which circuit (II) is a pure control circuit from the brake actuation member for improved response. Electrical circuit (III) is used for the electrical control of pressure- control valves (14, 19) on the tractor vehicle and for the electrical control of the trailer brakes via lead 30. In the trailer, electrical and pressure medium control is simultaneous. In the tractor, the electrical control is predominant via solenoid valves 15, 23. Load sensing and anti-skid control means 26, 27 can be employed. If the electrical circuits fail the brakes are controlled by pressure medium. Other variations of tractor control circuits are described. <IMAGE>

Description

SPECIFICATION Improvements in or relating to brake systems for tractor vehicle and trailer combinations The invention relates to brake systems for tractor vehicle and trailer combinations.
One form of brake system for a tractor vehicle and trailer combination has a multi-circuit service brake which is controlled by a brake actuation member operable by the driver and a trailer brake control valve having at least two control circuits.
In one such known brake system (U.S. Patent Specification No. 3,275,381 ) each of the two hydraulic brake circuits of the tractor vehicle includes a brake booster which is hydraulically controlled and allows compressed air from a compressed-air reservoir to act upon a respective booster piston which then actuates a hydraulic cylinder for generating pressure in hydraulic wheel brake cylinders connected downstream thereof.
This known brake system has the disadvantage that the multiple pressure boosting causes large hystereses and a very long time elaspses until the brake responds. This applies both to the tractor vehicle and to the trailer.
According to the present invention there is provided a brake system for a tractor vehicle and trailer combination having a multi-circuit service brake which is controlled by a brake actuation member operable by the driver, and a trailer brake control valve having at least two control circuits, in which the brake actuation member is constructed to control electrical as well as pressure-medium-operated circuits, and one of the pressure-medium-operated circuits intended for controlling the trailer brake control valve is a pure control circuit.
A brake system for tractor vehicle and trailer combinations embodying the present invention can avoid the above mentioned disadvantage in that the pressure generated by the brake actuation member is fed to the trailer brake control valve in an individual circuit. Hence, rapid response of the trailer brake control valve is ensured.
Furthermore, it is advantageous that the response can also be accelerated on the tractor vehicle by using an electrical circuit.
The invention will be further described by way of example with reference to the accompanying drawings in which: Figure 1 is a diagrammatic illustration of a brake system for a tractor vehicle and trailer combination, according to one embodiment of the present invention, having a three-circuit brake value generator with electrical control of the tractor vehicle brake and with compressed-air auxiliary control of the tractor vehicle front axle brakes, Figure 2 is a diagrammatic illustration of a similar brake system to that of Figure 1, but with compressed-air auxiliary control of the tractor vehicle rear axle brakes, and Figure 3 is a diagrammatic illustration of a similar system with a compressed-air auxiliary actuating means for the tractor vehicle front axle brakes.
A brake system for a tractor vehicle and a trailer combination is supplied with compressed air by a compressor 1 by way of a four-circuit protective valve 2. A three-circuit brake actuation member, responsive for example to depression of a brake pedal, is disposed downstream of the protective valve 2 and comprises two individual pneumatic valves 4 and 5 and an electrical current controlling circuit element 6. The valves 4 and 5, and the circuit element 6 each monitor a circuit I, II and Ill respectively, circuit II being a pure control circuit, since it only leads from a supply line 7 by way of the individual valve 5 to a control connection 8 of a trailer brake control valve 9 having at least two control circuits.Although circuit I also leads from a supply line 10 by way of the individual valve 4 to a control connection 11 of the trailer brake control valve 9, a line 12 additionally branches from circuit I downstream of the brake actuation member 3 and leads to one control connection 13 of a pressure-control valve 1 4.
The pressure-control valve 14 has two control circuits and, for this purpose, has a second control connection for electrical control which is performed by means of a solenoid 1 5. The pressure-control valve 14 with two control circuits is associated with the front wheel brakes and is connected between a compressed-air reservoir 1 6 fed with compressed-air by way of the supply line 10, and two front wheel brake cylinders 1 7 and 1 8. A pressure-control valve 1 9 with only a single control circuit is provided for the rear wheel brakes and is disposed between a compressed-air reservoir 20 fed with compressed air by way of the supply line 7, and two rear wheel brake cylinders 21 and 22.The pressure-control valve 1 9 has a solenoid 23, and the two solenoids 1 5 and 23 are each connected by way of a respective lead 24 or 25 to a load-dependent switching element 26 which is electrically controllable by two load sensors 26' and 26". As is shown by dash-dot lines in the drawing, an anti-skid brake pressure regulating switching element 27 having sensors 27' and 27" responsive to the rotational characteristics of the wheels can be incorporated in the two lines 24 and 25. The switching element 26, and possibly also the switching element 27, are actuated by an electronic control device 28 which is connected to the electrical current controlling circuit element 6 of the brake actuation member 3 by way of an electrical lead 29.
An electrical lead 30 for the electrical control of the trailer brakes is connected to the output of the control device 28. Moreover, the trailer is connected to the tractor vehicle by way of two pairs 31 and 32 of pressure-medium coupling heads and by way of a supply line 33 and also by way of a brake line 34.
The system of Figure 1 operates as follows:- Upon operation of the brake actuation member 3, the electrical current controlling circuit element 6 and also the tvvo individual valves 4 and 5 are switched over. Current flows through the lead 29 to the electronic control device 28 where it is evaluated. A resulting brake value is then modulated by the load-dependent switching element 27, and the product is fed to the solenoids 15 and 23 by way of the leads 24 and 25. The solenoids 1 5 and 23 change over the pressure-control valves 1 4 and 19, and compressed air from the compressed-air reservoirs 1 6 and 20 is regulated and is introduced into the brake cylinders 17, 18, 21 and 22 over a short path. The brakes are applied with metered forces.
Compressed air flows directly and solely to the trailer brake control valve 9 simultaneously with electric actuation by an electrical control signal which is fed to the trailer by way of the lead 30, so that the trailer brake control valve 9 is changed over rapidly and reliably to apply the brakes and allows compressed-air to flow from the trailer supply line 33 into the trailer brake line 34. In this manner, the trailer is braked rapidly and reliably, possibly even before the tractor vehicle is braked.
The reliability of the control of the trailer brake control valve is ensured by the fact that the circuit II is solely connected to the individual valve 5 of the brake actuation member 3.
In the tractor vehicle, compressed-air also reaches the control connection 1 3 of the pressurecontrol valve 14 later than the electrical actuation.
However, the compressed-air remains ineffective if the electrical control has already taken place.
However, if the electrical system should fail, the compressed air at the control connection 1 3 changes over the pressure-control valve 14 in an auxiliary capacity, and the vehicle is still braked by at least the front wheel brakes. Since the trailer brakes are fully effective, the tractor vehicle and trailer combination can be reliably braked.
Alternatively, the auxiliary control by a pressure-control valve can be transferred to the rear wheel brakes if required. A brake system with such a modification is shown in Figure 2 in which the parts corresponding to those of Figure 1 are provided with the same reference numerals. Only the pressure-control valves 14 and 1 9 are interchanged.
When using an anti-skid brake pressure regulating control system incorporating the antiskid switching element 27, the pressure-control valves 14 and 1 9 have to be constructed such that they are able to control individual brake pressures in each case for multi-channel anti-skid control brake pressure regulating systems. By way of example, this can be achieved by a combination of a plurality of two-port, two-position solenoid valves or by one three-port, two-position solenoid valve and two two-port, two-position solenoid valves for controlled pressure rise, for decreasing the pressure and for holding the pressure.
A modification of the types of construction of Figures 1 and 2 is illustrated in Figure 3. The brake actuation member 3, the electronic switching element 28, the trailer brake control valve 9 and the entire trailer brake system and also the supply of pressure from the reservoirs 1 6 and 20 are the same as in the brake systems illustrated in Figures 1 and 2.
However, pressure-control valves 35 and 36 are used which are singly and solely controlled by a respective solenoid 37 or 38. A two-way nonreturn valve 39 is disposed downstream of the pressure-control valve 35 associated with the front wheel brakes, the second side of which valve 39 is connected to the line 12 associated with circuit I.
In this embodiment, the front wheel brakes and also the rear wheel brakes are generally controlled by way of the solenoids 37 and 38 respectively and are actuated by way of the pressure-control valves 35 and 36. However, if the electrical system should fail, the two-way non-return valve 39 is changed over into its other end position by the pressure rise in the line 12 without impairing the trailer brake, and air flows from the circuit I into the brake cylinders 17 and 1 8 of the front wheel brakes. The tractor vehicle is then still braked by the front wheel brakes. Since the trailer brakes are fully effective, the tractor vehicle and trailer combination can be reliably braked.

Claims (9)

1. A brake system for a tractor vehicle and trailer combination having a multi-circuit service brake which is controlled by a brake actuation member operable by the driver, and a trailer brake control valve having at least two control circuits, in which the brake actuation member is constructed to control electrical as well as pressure-medium-operated circuits, and one of the pressure-medium-operated circuits intended for controlling the trailer brake control valve is a pure control circuit.
2. A brake system for a tractor vehicle and trailer combination as claimed in claim 1, in which the brake actuation member is constructed to control three circuits.
3. A brake system for a tractor vehicle and trailer combination as claimed in claim 1 or 2, in which the pressure-medium-operated circuits and/or the electrical circuit controlled by the brake actuation member are/is intended for controlling the trailer brakes.
4. A brake system for a tractor vehicle and trailer combination as claimed in claim 1, 2 or 3, in which an electrical circuit controlled by the brake actuation member controls at least one pressurecontrol valve associated with a tractor vehicle brake circuit.
5. A brake system for a tractor vehicle and trailer combination as claimed in claim 4, in which the pressure-control valves are disposed between compressed-air reservoirs and wheel brake cylinders, and each compressed-air reservoir is connected by way of an individual line to one of the two pressure-medium-operated circuits.
6. A brake system for a tractor vehicle and trailer combination as claimed in claim 5, in which load-dependent switching elements are incorporated in the electrical circuit.
7. A brake system for a tractor vehicle and trailer combination as claimed in claims 4, 5 or 6, in which each of the pressure-control valves controlling brake pressure of tractor vehicle brakes has a single control circuit, and at least one brake line located downstream of one such pressurecontrol valve, incorporates a two-way non-return valve whose other side is connected to a pressuremedium-operated circuit controlled by the brake actuation member.
8. A brake system for a tractor vehicle and trailer combination as claimed in claim 5, 6 or 7, in which switching elements of an anti-skid brake pressure regulating system are incorporated in the electrical circuit and the pressure-control valves are in each case adapted for regulating individual brake pressures for the purpose of multi-channel anti-skid control.
9. A brake system for a tractor vehicle and trailer combination, constructed and arranged and adapted to operate substantially as hereinbefore particularly described with reference to and as illustrated in Figure 1 or Figure 2 or Figure 3 of the accompanying drawings.
GB08328780A 1982-10-28 1983-10-27 Improvements in or relating to brake systems for tractor vehicle and trailer combinations Expired GB2129079B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19823239970 DE3239970A1 (en) 1982-10-28 1982-10-28 CAR TRAIN BRAKE SYSTEM

Publications (3)

Publication Number Publication Date
GB8328780D0 GB8328780D0 (en) 1983-11-30
GB2129079A true GB2129079A (en) 1984-05-10
GB2129079B GB2129079B (en) 1985-12-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB08328780A Expired GB2129079B (en) 1982-10-28 1983-10-27 Improvements in or relating to brake systems for tractor vehicle and trailer combinations

Country Status (4)

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DE (1) DE3239970A1 (en)
FR (1) FR2535273B1 (en)
GB (1) GB2129079B (en)
SE (1) SE453484B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2156021A (en) * 1984-03-19 1985-10-02 Teves Gmbh Alfred Process and apparatus for the control of a brake unit for automotive vehicles
GB2161562A (en) * 1984-07-12 1986-01-15 Teves Gmbh Alfred Brake system
GB2196078A (en) * 1986-10-07 1988-04-20 Bendix Ltd Electrically controlled brake system
GB2268989A (en) * 1992-07-22 1994-01-26 Grau Ltd Braking systems

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3337800A1 (en) * 1982-10-30 1984-05-03 Robert Bosch Gmbh, 7000 Stuttgart MULTI-CIRCLE PRESSURE BRAKE SYSTEM
DE3527907A1 (en) * 1985-08-03 1987-02-12 Wabco Westinghouse Fahrzeug ELECTRICALLY CONTROLLED PRESSURE BRAKE SYSTEM
DE3545021C2 (en) * 1985-12-19 1996-09-12 Bosch Gmbh Robert Electro-pneumatic brake system
DE3602607A1 (en) * 1986-01-29 1987-07-30 Wabco Westinghouse Fahrzeug PRESSURE-OPERATED MOTOR CAR BRAKE SYSTEM
DE3603143A1 (en) * 1986-02-01 1987-08-06 Bosch Gmbh Robert Electro-pneumatic brake system
DE3841750A1 (en) * 1988-12-12 1990-06-13 Wabco Westinghouse Fahrzeug METHOD AND ARRANGEMENT FOR CONTROLLING AN ELECTRICALLY CONTROLLED BRAKE CIRCUIT OF A MULTI-CIRCLE BRAKE SYSTEM
DE3916642A1 (en) * 1989-05-22 1990-11-29 Wabco Westinghouse Fahrzeug BRAKE CIRCUIT
DE4016463A1 (en) * 1990-03-17 1991-09-19 Wabco Westinghouse Fahrzeug BRAKE SYSTEM WITH AT LEAST ONE BRAKE CIRCUIT

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3010768A (en) * 1960-02-26 1961-11-28 Bendix Westinghouse Automotive Electro-pneumatic brake system
US3275381A (en) * 1964-06-29 1966-09-27 Bendix Corp Fluid pressure servomotor
DE1963879C3 (en) * 1969-11-22 1985-03-21 Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover Trailer control valve for dual-circuit, dual-line air brake systems in motor vehicles
FR2133591B1 (en) * 1971-04-16 1977-06-17 Bendix Corp
DE2213475A1 (en) * 1971-05-10 1972-11-23 VEB Berliner Bremsenwerk, χ 1134 Berlin Dual-circuit dual-line brake system with a three-circuit brake valve, especially for road vehicles
DE2420665B2 (en) * 1974-04-29 1976-10-28 Cermak, Eduard, Dipl.-Ing., 7100 Heilbronn ELECTROPNEUMATIC BRAKE CONTROL DEVICE FOR VEHICLE TRAINS
DE2613663A1 (en) * 1976-03-31 1977-10-13 Bosch Gmbh Robert Air brake for lorry and trailer - has test position on handbrake valve for releasing trailer brake only
DE3027745A1 (en) * 1980-07-22 1982-02-18 Alfred Teves Gmbh, 6000 Frankfurt Electro-hydraulic braking system for load handling vehicle - uses emergency hydraulic brake when vehicle electrical supply fails
DE3204185A1 (en) * 1982-02-06 1983-08-11 Robert Bosch Gmbh, 7000 Stuttgart PRESSURE BRAKE SYSTEM
DE3219140C2 (en) * 1982-05-21 1995-03-16 Bosch Gmbh Robert Wagon train braking system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2156021A (en) * 1984-03-19 1985-10-02 Teves Gmbh Alfred Process and apparatus for the control of a brake unit for automotive vehicles
US4658939A (en) * 1984-03-19 1987-04-21 Alfred Teves Gmbh Process and apparatus for the control of a brake unit for automotive vehicles
GB2161562A (en) * 1984-07-12 1986-01-15 Teves Gmbh Alfred Brake system
GB2196078A (en) * 1986-10-07 1988-04-20 Bendix Ltd Electrically controlled brake system
GB2196078B (en) * 1986-10-07 1991-03-06 Bendix Ltd Fluid pressure operable vehicle braking systems
GB2268989A (en) * 1992-07-22 1994-01-26 Grau Ltd Braking systems
US5443306A (en) * 1992-07-22 1995-08-22 Grau Limited Electrohydraulic brake control system
GB2268989B (en) * 1992-07-22 1995-10-25 Grau Ltd Braking systems

Also Published As

Publication number Publication date
SE8304969L (en) 1984-04-29
FR2535273A1 (en) 1984-05-04
SE453484B (en) 1988-02-08
GB8328780D0 (en) 1983-11-30
GB2129079B (en) 1985-12-04
FR2535273B1 (en) 1987-01-30
DE3239970A1 (en) 1984-07-12
SE8304969D0 (en) 1983-09-15

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Legal Events

Date Code Title Description
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19921027