GB2484586A - Slip regulated hydraulic vehicle braking system having and additional pump - Google Patents

Slip regulated hydraulic vehicle braking system having and additional pump Download PDF

Info

Publication number
GB2484586A
GB2484586A GB1117506.4A GB201117506A GB2484586A GB 2484586 A GB2484586 A GB 2484586A GB 201117506 A GB201117506 A GB 201117506A GB 2484586 A GB2484586 A GB 2484586A
Authority
GB
United Kingdom
Prior art keywords
brake
pump
additional pump
hydraulic
braking system
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
GB1117506.4A
Other versions
GB2484586B (en
GB201117506D0 (en
Inventor
Michael Kunz
Stefan Strengert
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 GB201117506D0 publication Critical patent/GB201117506D0/en
Publication of GB2484586A publication Critical patent/GB2484586A/en
Application granted granted Critical
Publication of GB2484586B publication Critical patent/GB2484586B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • B60T8/32—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
    • B60T8/40—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 comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/4072—Systems in which a driver input signal is used as a control signal for the additional fluid circuit which is normally used for braking
    • 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
    • B60T8/40—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 comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • 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
    • B60T8/40—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 comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/404—Control of the pump unit
    • B60T8/405—Control of the pump unit involving the start-up phase
    • 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
    • B60T13/12—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 liquid
    • B60T13/14—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 liquid using accumulators or reservoirs fed by pumps
    • B60T13/142—Systems with master cylinder
    • B60T13/145—Master cylinder integrated or hydraulically coupled with booster
    • 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
    • B60T13/12—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 liquid
    • B60T13/14—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 liquid using accumulators or reservoirs fed by pumps
    • B60T13/142—Systems with master cylinder
    • B60T13/145—Master cylinder integrated or hydraulically coupled with booster
    • B60T13/146—Part of the system directly actuated by booster pressure
    • 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
    • B60T13/12—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 liquid
    • B60T13/16—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 liquid using pumps directly, i.e. without interposition of accumulators or reservoirs
    • 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
    • B60T13/12—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 liquid
    • B60T13/16—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 liquid using pumps directly, i.e. without interposition of accumulators or reservoirs
    • B60T13/161—Systems with master cylinder
    • 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
    • B60T13/662—Electrical control in fluid-pressure brake systems characterised by specified functions of the control system components
    • 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
    • B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic 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
    • B60T8/17—Using electrical or electronic regulation means to control braking
    • 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
    • B60T8/3255—Systems in which the braking action is dependent on brake pedal data
    • B60T8/326—Hydraulic 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
    • B60T8/32—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
    • 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

Abstract

A slip-regulated, hydraulic vehicle braking system 1, wherein a brake circuit of the vehicle braking system 1 is connected to an additional pump 15 which is provided in addition to hydraulic pumps 9 provided in each brake circuit, and which is connected directly to a brake fluid reservoir 18; 20. The additional pump 15 allows an extremely quick build up of braking pressure and is provided for automatic braking for accident avoidance and reduction of accident consequences. The additional pump 15 may comprise several pump elements 17. The wheel brake 3 may be connected to the additional pump 15 via a non return valve 6.

Description

Descdption ?U.p±.gp1S hydraulic vehicle braking sySrr.
The invention relates to slip-regLdated, hydraulic vehicle brakhig systems.
Prior Art
Slipregulated, hydraulic vehicle braking systems are known. They comprise a main brake cylinder which can be actuated by human effort and to which one or more brake circuits are connected to which, in turn, one or more wheel brakes are connected in each case. In many cases, the main brake cylinder comprises a brake force booster, in most cases a lowpressure brake force booster which is often also referred to as a vacuum brake force booster, Electromechanical brake force boosters are also known. The wheel brakes are connected to the brake circuit via braking pressure modulating valve arrangements which typicafly comprise a braking pressure increasing valve and a braking pressure decreasing valve. In addition, a hydraulic pump is provided in each brake circuit for increasing braking pressure and for returning brake fluid from the wheel brakes towards the main brake cylinder, which pump is also referred to as a return pump n many cases. With the wheel braking pressure modulating valve arrangement and the hydraulic pump, it is possible to regulate the braking pressure for each wheel individuafly, e.g., using antilock braking system regulation, an&slip regulation and/or the electronic stability program, for which the abbreviations ABS, ASR, ESP and/or FDR are conventional. The slip regulators are known per se and will not be explained in more detail herein.
DE 10 2004 027 508 Al discloses a sUpregulated, hydraulic duacircuit vehicle braking system which comprises a common hydraulic pump for both brake 3o circuits instead of one hydraulic pump in each brake circuit. A suction side of the hydraulic pump is connected directly to a pressureless brake fluid reservoir which is mounted on the main brake cyfinder and can also he regarded as a (pressur&ess) hydraulic accumulator. Furthermore, the suction side of the hydrauhc pump is connected to the two brake cfrcuits via a magnetic vahie. A hydrauhc accumulator, i.e.., a pressure accumulator, is connected to a pressure side of the hydraulic pump and has the two brake circuits connected thereto via magnetic valves referred to as accumulator valves. The hydraulic pump supplies brake fluid to the pressure accumulator so that pressurised brake fluid is available to actuate the brakes independently of the main brake cylinder being actuated. The known vehide braking system allows extremely quick brake actuation since braking pressure does not have to be built up initially but rather is available in the hydraulic accumulator..
Disclosure of the invention
L5 In accordance with the present invention, there is provided a slipregulated., hydraulic vehicle braking system having at least one brake circuit which is connected to a main brake cylinder and to which at least one wheel brake is connected, a hydrauUc pump to whose pressure side the at least one wheel brake is connected, and an additional pump to whose pressure side at least one wheel brake is connected.
The inventive, slipreguIated, hydraulic vehicle braking system of the present invention comprises an additional pump in addition to the hydraulic pump provided in each brake circuit, to whose pressure side at least one wheel brake or at least one brake circuit is connected. The additional pump is an hydraulic pump. It can basically be of the same construction as the hydraulic pumps in the brake circuits but it can also be of a different construction. The word "additional" is used for unequivocally designating the pump and for differentiating from the hydraulic pumps of the brake circuit, and should ernphasise that the pump is provided in addition to the hydraulic pumps provided in the brake circuits.
The additional pump allows an extremely quick build up of braking pressure which is requlre or in any case advantageous, for accident avoidance, reduction of accident consequences and the electronic stability program, i.e., for regulating brakes in which a qulàk build up of a high braking force is a decisive advantage.
One advantage of the invention is that an exlätlng vehicle braking system can remain unchanged. It simply requires one of its brake circuits to be connected to the pressure side of the additional pump For this reason, the invention can be implemented on an existing vehicle braking system with low expenditure.
A further advantage of the invention is that the hydraulic separation of the brake circuits of a multi-circuit vehicle braking system is not impaired or Is even removed.
An additional advantage of the Invention is that a hydraulic pump, as used in slip-regulated, hydraulic vehicle braking systems can be used as the additional pump, use can therefore be made of existing components.
2U The subordinate Claims describe advantageous embodiments and developments of the Invention stated in Claim 1.
Brief description of the drawing
By way of example only, a specific embodiment of the present invention will now be described with reference to the accompanying drawing which shows an embodiment of hydraulic circuit diagram of a slip-regulated, hydraulic vehicle braking system in accordance with the invention.
3ff Embodiment of the invention The slip-regulated, hydraulic vehicle braking system I illustrated In the drawing comprises two brake cIrcuits 1, ii which are connected to a dual-circuit main brake cylinder 2. Connected to each brake circuit I, Il are two wheel brakes 3 in the exemplified embodiment, wherein neither the number of two brake circuits I, II J nor the number of two wheel brakes 3 per brake circuit I, II is compulsory for the invention.
Each wheel brake 3 Is allocated a braking pressure increasing valve 4 and a braking pressure decreasing valve 5. The braking pressure increasing valves 4 are 2-portI2way magnetic valves which are open in their currentless basic position and the braking pressure decreasing valves 5 are 2-port/2way magnetic valves which are dosed In their currentless basic position. Connected hydraulically In parallel with the braking pressure increasing valves 4 are non-return valves 6 which can have a flow passing through them in the direction from the wheel brakes 3 to the main brake cylinder 2.
Each brake circuit I, II comprises a separating valve 7 via which it is connected to the main brake cylinder 2. Connected to the separating valves 7 are the braking pressure increasing valves 4. The separating valves 7 are 2-portl2-way valves which are open in their currentless basic position and to which non-return valves 8 are connected In parallel, which non-return valves can have a flow passing through them from the main brake cylkider 2 towards the wheel brakes 3.
Each brake circuit I, II comprises a hydraulic pump 9, to whose suction side the wheel brakes 3 are connected via the braking pressure decreasing valves 5.
Furthermore, the suction sides of the hydraulic pumps 9 are connected to the main brake cylinder 2 via suction valves 10. The suction valves 10 are 2-portl2-way magnetic valves which are closed in their currentless basic position.
Connected on the suction side of the hydraulic pumps 9 are also hydraulic accumulators II which are used for the intermediate storage of brake fluid which flows from the wheel brakes 3 by opening the braking pressure decreasing valves 5 in the case of slip regulation. Disposed between the hydraulic accumulators 11 and the suction sides of the hydraulic pumps 9 are non-return valves 12 which can have a flow passing through them towards the hydraulic pumps 9. The hydraulic pumps 9 are driven by a common electric motor 13.
The braking pressure increasing valves 4 and the braking pressure decreasing valves 5 form braking pressure modulating valve arrangements, by means of which wheel braking pressures In the wheel brakes 3 can be regulated for each wheel individually for the purpose of slip regulation. For the purpose of slip regulation, the hydraulic pumps 9 are driven, the separating valves 7 can be closed for slip regulation in order to hydraulically separate the main brake cylinder 2 from the vehicle braking system 1. For the suction of the brake fluid, the suction valves 10 can be opened. Slip regulators, for example using anti-lock braking system regulation, anti-slip regulation and/or the electronic stability IS program (ASS, ASR, ESP, FDR) are known and will not be explained in more detail herein.
One brake circuit lis connected to a pressure side of an additional pump 15 via a non-return valve 14 which can have a flow passing through it towards the brake circuit I, which additional pump is likewise a hydraulic pump. The additional pump 15 comprises a dedicated electric motor 16 to drive it. In the exemplified embodiment, the additional pump 15 comprises a number of e.g., nine pump elements 17 which are driven in common by the electric motor 16 and are hydraulically connected in parallel, i.e., their pressure sides are connected together and to whose pressure sides the brake circuit I is in common connected via the non-return valve 14. Likewise, the suction sides of the pump elements 17 are connected together. The additional pump 15 can be for example a multi-piston pump in a, for example, series arrangement, box arrangement or star arrangement, even in several planes whose pump pistons of one or more eccentrics are driven in common by the electric motor 16. The embodiment of the additional pump 15 described by way of example is not compulsory for the invention.
The additional pump 15 is provided for an extremely quick build up of braking pressure and Its suction side is connected directly -i.e., without any intermediate connection of a valve or the like and using preferably a short lead -to a brake fluid reservoir 18. In the exemplified embodiment, a separate brake fluid reservoir 18 is provided for the additional pump 15. As shown with the dashed line 19$ the suction side of the additional pump 15 can also be connected to an existing brake fluid reservoir 20 of the vehicle braking system I which is typically mounted on the main brake cylinder 2. In this case, the additional brake fluid reservoir 18 is not required. The suction side of the additional pump 15 is the mutually connected suction sides of their pump elements 17. Owing to the direct connection of the suction side of the additional pump 15 to the additional brake fluid reservoir 18 or the existing brake fluid reservoir 20, the additional pump 15 has a considerably quicker build up of pressure than the hydraulic pumps 9 in the brake circuits I, II which have to draw In brake fluid from the main brake cylinder 2 through the suction valves 10, wherein the brake fluid is unpressurised when the main brake cylinder 2 is not actuated. The drawn in brake fluid Is greatly restricted by the flow resistance of the suction valves 10 and the flow resistance of the main brake cylinder 2 which has a large flow resistance owing to its construction.
Braking pressure is built up using the additional pump 15 in particular In cases In which an extremely qulck build up of braking pressure produces a considerable advantage and/or when the main brake cylinder 2 is not actuated and the vehicle braking system I is pressureless. Two such applications are the electronic stability program, whose effectiveness for skid avoidance is increased by quick engagement of the brakes,. and accident avoidance or reduction of accident consequences which are iikewise more effective the quicker the brakes are engaged. The additional pump 15 is controlled or regulated by means of control or regulating electronics,, not illustrated, of the vehicle braking system I which controls or regulates its magnetic valves 4, 5, 7, 10 and the electric motor 13 of the hydraulic pumps 9.
A flmng valve 21 is provided for fiUing the additional brake fluid reservoir 18 with brake fluid and connects the suction side of the additional pump 15 and thus the additional brake fluid reservoir 18 to the pressure side of the hydraulic pump 9 of the brake circuit Filling occurs with the vehicle braking system I not actuated, the suction valve 10 is opened to fill the additional brake fluid reservoir 18, It) The wheel brakes 3, which are connected to the brake circuit I which is connected to the additional pump 15, are allocated to a front axle of a vehicle.
snce when brakThg, the front wheels are additionally loaded with a dynamic weight shifting and normally provide, or in any case can provide, the greatest contribution to braking. However, it is not compulsory that the wheel brakes 3 allocated to the front axle are connected to the additional pump 15, other wheel brakes 3 or5 in the case of an X brake circuit distribution, one wheel brake 3 of a front wheel and one wheel brake 3 of a rear wheel can be connected to the brake cftcuit I which is connected to the additional pump 15.
GB1117506.4A 2010-10-13 2011-10-11 Slip-regulated, hydraulic vehicle braking system Expired - Fee Related GB2484586B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010042362A DE102010042362A1 (en) 2010-10-13 2010-10-13 Slip-controlled, hydraulic vehicle brake system

Publications (3)

Publication Number Publication Date
GB201117506D0 GB201117506D0 (en) 2011-11-23
GB2484586A true GB2484586A (en) 2012-04-18
GB2484586B GB2484586B (en) 2013-12-04

Family

ID=45091837

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1117506.4A Expired - Fee Related GB2484586B (en) 2010-10-13 2011-10-11 Slip-regulated, hydraulic vehicle braking system

Country Status (4)

Country Link
KR (1) KR20120038377A (en)
DE (1) DE102010042362A1 (en)
FR (1) FR2966116A1 (en)
GB (1) GB2484586B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017007524A (en) * 2015-06-23 2017-01-12 日立オートモティブシステムズ株式会社 Brake device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012223319A1 (en) * 2012-12-17 2014-06-18 Robert Bosch Gmbh Slip-controlled hydraulic vehicle brake system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0482367A1 (en) * 1990-10-26 1992-04-29 Robert Bosch Gmbh Hydraulic brake system, especially for motor vehicles
JPH08150911A (en) * 1994-11-28 1996-06-11 Mazda Motor Corp Anti-lock brake device of vehicle
EP1481864A1 (en) * 2003-05-28 2004-12-01 Bayerische Motoren Werke Aktiengesellschaft Method and device for braking a motor vehicle by means of a driver assistance system

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004027508A1 (en) 2004-06-04 2005-12-22 Robert Bosch Gmbh Hydraulic brake system and method for influencing a hydraulic brake system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0482367A1 (en) * 1990-10-26 1992-04-29 Robert Bosch Gmbh Hydraulic brake system, especially for motor vehicles
JPH08150911A (en) * 1994-11-28 1996-06-11 Mazda Motor Corp Anti-lock brake device of vehicle
EP1481864A1 (en) * 2003-05-28 2004-12-01 Bayerische Motoren Werke Aktiengesellschaft Method and device for braking a motor vehicle by means of a driver assistance system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017007524A (en) * 2015-06-23 2017-01-12 日立オートモティブシステムズ株式会社 Brake device
KR20180011205A (en) 2015-06-23 2018-01-31 히다치 오토모티브 시스템즈 가부시키가이샤 Brake device
DE112016002845B4 (en) 2015-06-23 2023-11-09 Hitachi Astemo, Ltd. Braking device

Also Published As

Publication number Publication date
GB2484586B (en) 2013-12-04
GB201117506D0 (en) 2011-11-23
FR2966116A1 (en) 2012-04-20
KR20120038377A (en) 2012-04-23
DE102010042362A1 (en) 2012-04-19

Similar Documents

Publication Publication Date Title
CN107000728B (en) Brake system and brake control device
CN107428323B (en) Brake system for a motor vehicle
KR102328466B1 (en) Braking system for a motor vehicle
EP3094529B1 (en) Brake control unit and brake system for vehicles
KR102050120B1 (en) Method for operating a brake system for motor vehicles, and brake system
US8918262B2 (en) Modularly designed pressure control device of a fluid pressure brake system of a vehicle
US9061670B2 (en) Hydraulic vehicle brake system
EP2701955A1 (en) Brake system for motor vehicles and method for operating the brake system
US20220161773A1 (en) Electrohydraulic power vehicle braking system
US20210070267A1 (en) Electrohydraulic vehicle power braking system for an autonomously driving land vehicle
KR102104190B1 (en) Method and brake system for operating a brake system for motor vehicles
US20120256478A1 (en) Hydraulic Vehicle Braking System
US8870300B2 (en) Method for actuating a hydraulic vehicle brake system
US20160200299A1 (en) Method and Device for Regulating a Brake System
US11639161B2 (en) Hydraulic power vehicle brake system and method for filling a hydraulic power vehicle brake system
US20160332611A1 (en) Hydraulic power unit and braking system for a vehicle
US9592808B2 (en) Pump housing for a motor vehicle hydraulic assembly with a connection for a wheel pressure sensor or a master brake cylinder pressure sensor
GB2484586A (en) Slip regulated hydraulic vehicle braking system having and additional pump
CN104228802B (en) The Vehicular brake device of the hydraulic pressure of slidable adjustment and the method for slidable adjustment
CN114929531A (en) Check valve for a hydraulically assisted vehicle brake system and hydraulically assisted vehicle brake system
US8141960B2 (en) Motor vehicle braking assembly
CN113993758B (en) Method for checking air in brake fluid for external force vehicle brake system
US9193341B2 (en) Slip-controlled hydraulic vehicle brake system
US20040075338A1 (en) Hydraulic brake system and method for influencing a hydraulic brake system
CN112384420A (en) Brake system

Legal Events

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

Effective date: 20151011