GB2402723A - Combined hydraulic and electromechanical vehicle braking system having a resetting device on the brake operating element - Google Patents

Combined hydraulic and electromechanical vehicle braking system having a resetting device on the brake operating element Download PDF

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Publication number
GB2402723A
GB2402723A GB0413086A GB0413086A GB2402723A GB 2402723 A GB2402723 A GB 2402723A GB 0413086 A GB0413086 A GB 0413086A GB 0413086 A GB0413086 A GB 0413086A GB 2402723 A GB2402723 A GB 2402723A
Authority
GB
United Kingdom
Prior art keywords
braking system
hydraulic
vehicle braking
force
brake
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
GB0413086A
Other versions
GB0413086D0 (en
GB2402723B (en
Inventor
Reinhard Weiberle
Frank Schumann
Matthias Hurst
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 GB0413086D0 publication Critical patent/GB0413086D0/en
Publication of GB2402723A publication Critical patent/GB2402723A/en
Application granted granted Critical
Publication of GB2402723B publication Critical patent/GB2402723B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • B60T8/26—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
    • B60T8/267—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 for hybrid systems with different kind of brakes on different axles
    • 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
    • B60T13/46—Vacuum systems
    • B60T13/52—Vacuum systems indirect, i.e. vacuum 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
    • 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
    • B60T13/74—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 electrical assistance or drive
    • B60T13/741—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 electrical assistance or drive acting on an ultimate actuator
    • 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
    • B60T7/00—Brake-action initiating means
    • B60T7/02—Brake-action initiating means for personal initiation
    • B60T7/04—Brake-action initiating means for personal initiation foot actuated
    • B60T7/042—Brake-action initiating means for personal initiation foot actuated by electrical means, e.g. using travel or force sensors
    • 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
    • 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
    • B60T8/34—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 having a fluid pressure regulator responsive to a speed condition
    • B60T8/48—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 having a fluid pressure regulator responsive to a speed condition connecting the brake actuator to an alternative or additional source of fluid pressure, e.g. traction control systems
    • B60T8/4809—Traction control, stability control, using both the wheel brakes and other automatic braking systems
    • B60T8/4827—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems
    • B60T8/4863—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems
    • B60T8/4872—Traction control, stability control, using both the wheel brakes and other automatic braking systems in hydraulic brake systems closed systems pump-back systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Regulating Braking Force (AREA)
  • Braking Elements And Transmission Devices (AREA)
  • Braking Systems And Boosters (AREA)

Abstract

The invention concerns a combined hydraulic and electromechanical vehicle braking system (10) or hybrid braking system. The invention proposes a resetting device 58, preferably a spring, which exerts a resetting force on an operating element 22, preferably a brake pedal, of a main brake cylinder. In this way pedal force/feel is maintained even if the hydraulic service braking system 12 fails. A single circuit form of the hydraulic service braking system 12 is also disclosed. Connection to an anti-lock system and/or a parking brake is also discussed.

Description

Combined hydraulic and electromechanical vehicle braking system
Description
Prior art
The invention concerns a combined hydraulic and electromechanical vehicle braking system with the features of the pre-characterizing clause of Claim 1. Such combined hydraulic and electromechanical vehicle braking systems can also be called hybrid braking systems.
Such a braking system is known from WO 95/16592. The known vehicle braking system has a hydraulic service braking system and an electromechanical service braking system. The hydraulic service braking system has a main brake cylinder which is operated by muscular force, with a foot brake pedal as the operating element to operate the main brake cylinder. Instead of the foot brake pedal, for instance, a hand brake lever can be provided as the operating element for operation by muscular force. Hydraulic wheel brakes, which in the known vehicle braking system brake the front wheels of a vehicle, are connected to the main brake cylinder. The hydraulic service braking system of the known vehicle braking system is in the form of a dual-circuit braking system, and has a dual-circuit main brake cylinder.
The electromechanical service braking system of the known vehicle braking system has electromechanical wheel brakes, which in the known vehicle braking system brake the rear wheels of a vehicle. As the setpoint generator for a braking force to be applied with the electromechanical service braking system, the foot brake pedal, i.e. the operating element of the hydraulic service braking system, the position of which is picked up by a sensor, is used.
The operating element and sensor form a braking value generator of the electromechanical service braking system.
Electromechanical wheel brakes are known per se. They usually have an electric motor, which for braking presses a friction brake pad onto a brake body to be braked, particularly a brake disc or brake drum, via rotation/translation shift gearing, usually helical gearing. Step-down gearing, often in the form of planetary gearing, is connected between the electric motor and the rotation/translation shift gearing. WO 96/03 301 discloses such an electromechanical wheel brake.
Explanation and advantage of the invention The vehicle braking system according to the invention, with the features of Claim 1, has a resetting device for the operating element of the main brake cylinder, which exerts a resetting force on the operating element depending on the travel of the operating element. The resetting device has the purpose of exerting a clearly detectable resetting force on the operating element of the main brake cylinder, if because of failure of the hydraulic service braking system, when the main brake cylinder is operated no hydraulic pressure is built up in the main brake cylinder, and consequently the main brake cylinder exerts no counter- force on the operating element against operation. According to the invention, the resetting device according to the invention exerts a clearly detectable resetting force on the operating element, so that a vehicle driver has at least approximately a familiar pedal feel if the hydraulic service braking system fails and consequently the brake pressure does not build up in the main brake cylinder. The resetting force of the resetting device can be approximately as great as in the case of traditional hydraulic service braking systems. The resetting force of the resetting device can also be noticeably lower, so that when the vehicle braking system is operated, a vehicle driver notices, because of the noticeably reduced pedal force, that the vehicle braking system is out of order. The resetting force of the resetting device does not remain nearly zero, and also not negligibly small in relation to the usual pedal force with a functional vehicle braking system. If the hydraulic service braking system fails, the vehicle driver should not have the feeling of a "falling through" foot brake pedal because of a pedal force which, at least after previous operation of the functional vehicle braking system, is hardly detectable. If the hydraulic service braking system fails, a pedal force which goes almost to zero, and consequently a brake pedal which "falls through" when it is operated, would have the consequence of full braking of the electromechanical wheel brakes, since the brake pedal or a different operating element simultaneously forms the braking value generator of the electromechanical service braking system. The invention thus has the advantage that full braking, i.e. excessively strong braking of the electromechanical wheel brakes, is avoided when the hydraulic service braking system fails.
Another advantage is that a vehicle driver is saved from the fright of a "falling-through brake pedal" when the hydraulic service braking system fails.
The resetting device can be, for instance, a mechanical spring element, for instance a spiral spring which acts on or near an axis of rotation of the operating element of the main brake cylinder, a coil compression spring or tension spring. A gas pressure spring, for instance, is also possible as the resetting device. In principle, a so-called pedal travel simulator can also be used as the resetting device. Pedal travel simulators are known from electro- hydraulic external energy braking systems. They usually have a pressure accumulator, which is connected to the main brake cylinder and into which brake fluid can be displaced from the main brake cylinder, if in the case of external energy operation of such a braking system the main brake cylinder is separated from the vehicle braking system by separating valves. The brake fluid which is displaced from the main brake cylinder into the pressure accumulator builds up a hydraulic pressure in the pressure accumulator and in the main brake cylinder. Such a pedal travel simulator also exerts a resetting force on the operating element of the main brake cylinder, provided that a brake pressure can be built up in the main brake cylinder. A fault resulting in the failure of the hydraulic service braking system, therefore, must not occur in the main brake cylinder, but only downstream from a separating valve which is connected downstream from the main brake cylinder, and such a separating valve must be present so that the pedal travel simulator is effective. A pedal travel simulator is thus possible as the resetting device for the vehicle braking system according to the invention. Because of the demonstrated disadvantage, and also because of its price and the costs which are associated with it, a resetting device which is less expensive, simpler and/or effective even in the case of a defect on the main brake cylinder is preferred.
The subclaims concern advantageous embodiments and extensions of the invention which is given in Claim 1.
A favourable level of the resetting force of the resetting device is seen in the range from approximately half to the whole operating force of the operating element when the vehicle braking system is fully functional (Claims 2 and 3). It should be noted that if the vehicle braking system is fully functional, the resetting force of the resetting device must be applied in addition to an operating force which is required for pressure buildup in the main brake cylinder, so that the actual operating force is increased by the resetting force of the resetting device.
Drawing The invention is explained in more detail below on the basis of an embodiment which is shown in the drawing. The only figure shows a circuit diagram of a vehicle braking system according to the invention.
Description of the embodiment
The vehicle braking system 10 according to the invention, which is shown in the drawing, has a hydraulic service braking system 12 and an electromechanical service braking system 14. The hydraulic service braking system 12 acts, in particular, on the front wheels, and the electromechanical service braking system 14 acts on the rear wheels, of a vehicle (not shown), particularly a private car. Such combined hydraulic and electromechanical vehicle braking systems can also be called hybrid braking systems.
The electromechanical service braking system 14 has electromechanical wheel brakes 16, which are operated by electric motors 18. Such electromechanical wheel brakes 16 are known per se and are therefore not explained further here. The electromechanical wheel brakes 16 are in the form of parking brakes, i.e. once a braking force has been applied they maintain it in the unpowered state, or at least they can be switched into a parking brake position, in which they maintain an applied braking force in the unpowered state. This too is known per se.
In principle the hydraulic service braking system 12 can be implemented as a dual-circuit braking system, but in the shown and described embodiment the hydraulic service braking system 12 is in the form of a single-circuit braking system with a single-circuit main brake cylinder 20. The main brake cylinder 20 is operated by muscular force using a foot brake pedal 22, and has a vacuum brake booster 24 to support the muscular force.
However, the brake booster 24 is not obligatory. Hydraulic wheel brakes 26 are connected to the main brake cylinder 20.
The single-circuit form of the hydraulic vehicle braking system 12 has the advantage of simplification and is less expensive. Firstly, a less expensive single-circuit main brake cylinder 20 can be used instead of a dual-circuit main brake cylinder. Additionally, the number of required solenoid valves of the brake slip regulation device is reduced compared with a dual-circuit form; for instance, only one separating valve 34 and only one intake valve 48 are required. The hydraulic pump 28 for a second braking circuit is also omitted.
The hydraulic service braking system 12 has a brake slip regulation device which includes, among other things, the solenoid valves to be explained below and a hydraulic pump 28, which can be driven by an electric motor 30.
Additionally, an electronic controller 32 is part of the brake slip regulation device. With the brake slip regulation device, anti-lock braking regulation, drive slip regulation and/or driving dynamics regulation are possible.
A separating valve 34, to which each hydraulic wheel brake 26 is connected via its own brake pressure buildup valve 36, is connected downstream from the main brake cylinder 20. A check valve 38, through which a flow is possible in the direction of the wheel brakes 26, is connected in parallel with the separating valve 34; check valves 40, through which a flow is possible in the direction of the main brake cylinder 20, are connected in parallel with the brake pressure buildup valves 36.
Via brake pressure reduction valves 42, the hydraulic wheel brakes 26 are connected to an intake side of the hydraulic pump 28, the delivery side of which discharges between the separating valve 34 and the brake pressure buildup valves 36. A check valve 44, through which a flow is possible in the direction of the hydraulic pump 28, is connected between the brake pressure reduction valves 42 and the hydraulic pump 28. On a side of the brake pressure reduction valves 42 facing away from the wheel brakes 26, a pressure accumulator 46 for temporary storage of brake fluid from the wheel brakes 26 in the case of brake slip regulation is connected.
The intake side of the hydraulic pump 28 is connected to the main brake cylinder 20, with an intake valve 48 connected between them. By opening the intake valve 48, the intake side of the hydraulic pump 28 can be connected directly to the main brake cylinder 20, so that in the case of drive slip regulation or driving dynamics regulation a lO rapid pressure buildup with the hydraulic pump 28 is possible.
The solenoid valves 34, 36, 42, 48 are in the form of 2/2- way solenoid valves. The separating valve 34 and brake pressure buildup valves 36 are open in their unpowered basic setting, and the brake pressure reduction valves 42 and intake valve 48 are closed in their unpowered basic setting.
For brake slip regulation, the separating valve 34 is closed, and the brake pressure buildup valves 36 and brake pressure reduction valves 42 form wheel brake pressure regulation valve arrangements (also called wheel brake pressure modulation valve arrangements), using which wheel brake pressures in the hydraulic wheel brakes 26 can be regulated. Brake slip regulation is known per se, and is therefore not explained in more detail here. Brake slip regulation for individual wheels is possible. The brake pressure buildup valve 36 which is assigned to a vehicle wheel, and the associated brake pressure reduction valve 42, can be, for instance, replaced by one 3/3-way solenoid valve (not shown), which preferably, in an unpowered basic setting, connects the hydraulic wheel brake 26 to the main brake cylinder 20, in one switch setting blocks the wheel brake 26, and in another switch setting connects the wheel brake 26 to the pressure accumulator 46 and the intake side of the hydraulic pump 28.
Brake slip regulation takes place with the electronic controller 32, which operates the solenoid valves 34, 36, 42, 48, and controls the electric motor 30 of the hydraulic pump 28 and the electric motors 18 of the electromechanical wheel brakes 16. The electronic controller 32 receives signals from a pressure sensor 50, which is connected to the main brake cylinder 20, from pressure sensors 52, which are connected to the hydraulic wheel brakes 26, and from wheel rotation sensors 54, which are assigned to every vehicle wheel which can be braked. With the electronic controller 32, brake slip regulation of the hydraulic and electromechanical wheel brakes 26, 16, individually for each wheel, is possible.
Additionally, the electronic controller 32 receives a signal from a pedal travel sensor 56, which measures a travel of the foot brake pedal 22 and/or its position. The pedal travel of the foot brake pedal 22 which forms the operating element of the main brake cylinder 20 forms a setpoint value for the level of the braking force to be applied with the electromechanical service braking system 14. The relationship between pedal travel and braking force does not have to be linear. Additionally, with the electronic controller 32, braking force distribution between the front and rear axles of the vehicle is possible. The foot brake pedal 22 which forms the operating element, and/or the pedal travel sensor, form a braking value generator for a braking force to be applied with the electromechanical service braking system 14.
The vehicle braking system 10 has a resetting device 58 for the foot brake pedal 22. This is shown symbolically in the drawing as a coil spring. Instead, a spiral or torsion spring (not shown), which acts on the foot brake pedal 22 in the area of a pedal shaft, can be provided. Other spring elements such as a gas pressure spring, or other resetting devices, are possible (not shown). The resetting device 58 causes a travel-dependent resetting force on the foot brake pedal 22, which a vehicle driver detects as resistance on pressing down the foot brake pedal 22. The purpose of the resetting device 58 is to cause a pedal force on the foot brake pedal 22, if when the hydraulic service braking system 12 fails it is no longer possible to build up a hydraulic pressure with the main brake cylinder 20, and without the resetting device 58, it would be possible to press down the foot brake pedal 22 completely, almost without resistance. If the hydraulic service braking system 12 fails, the resetting device 58 transmits to the vehicle driver, at least approximately, a familiar pedal feeling. The pedal force is noticeably reduced compared with a functional hydraulic service braking system 12, but is still clearly detectable as a resistance. This avoids the vehicle driver, when the hydraulic service braking system 12 fails unexpectedly, pressing down the foot brake pedal 22 completely, which would result in full braking of the electromechanical service braking system 14.
Additionally, the vehicle driver is saved from the fright of a "fallingthrough" foot brake pedal 22, and nevertheless receives feedback of a fault of the vehicle braking system 10 because of the reduced pedal force.

Claims (9)

  1. Claims 1. Combined hydraulic and electromechanical vehicle braking system,
    À with a hydraulic service braking system, which to operate it has a main brake cylinder which is operated by muscular force, and to which at least one hydraulic wheel brake is connected, À with an electromechanical service braking system, which has a braking value generator and at least one electromechanical wheel brake, characterized in that the vehicle braking system (10) has a resetting device (58), which exerts a travel dependent resetting force on the operating element (22) of the main brake cylinder (20), for an operating element (22) of the main brake cylinder (20).
  2. 2. Vehicle braking system according to Claim 1, characterized in that the resetting force of the resetting device (58) is approximately as great as a main brake cylinder operating force of traditional hydraulic vehicle braking systems.
  3. 3. Vehicle braking system according to Claim 1, characterized in that the resetting force of the resetting device (58) is approximately half as great as a main brake cylinder operating force of traditional hydraulic vehicle braking systems.
  4. 4. Vehicle braking system according to Claim 1, characterized in that the hydraulic service braking system (12) is in the form of a single-circuit braking system.
  5. 5. Vehicle braking system according to Claim 1, characterized in that the hydraulic service braking system (12) has a single-circuit main brake cylinder (20).
  6. 6. Vehicle braking system according to Claim 1, characterized in that the hydraulic service braking system (12) is assigned to a front axle, and the electromechanical service braking system (14) is assigned to a rear axle, of a vehicle.
  7. 7. Vehicle braking system according to Claim 1, characterized in that the vehicle braking system (10) has a brake slip regulation device (18, 32, 34, 36, 42).
  8. 8. Vehicle braking system according to Claim 1, characterized in that the at least one electromechanical wheel brake (16) has a parking device.
  9. 9. A vehicle braking system substantially as herein described with reference to the accompanying drawing.
GB0413086A 2003-06-13 2004-06-11 Combined hydraulic and electromechanical vehicle braking system Expired - Fee Related GB2402723B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2003126789 DE10326789A1 (en) 2003-06-13 2003-06-13 Combined hydraulic and electromechanical vehicle brake system

Publications (3)

Publication Number Publication Date
GB0413086D0 GB0413086D0 (en) 2004-07-14
GB2402723A true GB2402723A (en) 2004-12-15
GB2402723B GB2402723B (en) 2006-01-11

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Application Number Title Priority Date Filing Date
GB0413086A Expired - Fee Related GB2402723B (en) 2003-06-13 2004-06-11 Combined hydraulic and electromechanical vehicle braking system

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JP (1) JP2005001661A (en)
DE (1) DE10326789A1 (en)
GB (1) GB2402723B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104417509A (en) * 2013-09-10 2015-03-18 谢成刚 Motor vehicle combined pedal and combination method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2305478A (en) * 1995-09-26 1997-04-09 Delphi France Automotive Sys Brake system for a motor vehicle
US20040135432A1 (en) * 2003-01-14 2004-07-15 Delphi Technologies Inc. Failsafe operation of a hybrid brake system for a vehicle

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2305478A (en) * 1995-09-26 1997-04-09 Delphi France Automotive Sys Brake system for a motor vehicle
US20040135432A1 (en) * 2003-01-14 2004-07-15 Delphi Technologies Inc. Failsafe operation of a hybrid brake system for a vehicle

Also Published As

Publication number Publication date
DE10326789A1 (en) 2004-12-30
GB0413086D0 (en) 2004-07-14
JP2005001661A (en) 2005-01-06
GB2402723B (en) 2006-01-11

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PCNP Patent ceased through non-payment of renewal fee

Effective date: 20110611