EP3752398A1 - Système de freinage pour véhicule électrohydraulique assisté par une force extérieure pour un véhicule routier à déplacement autonome - Google Patents

Système de freinage pour véhicule électrohydraulique assisté par une force extérieure pour un véhicule routier à déplacement autonome

Info

Publication number
EP3752398A1
EP3752398A1 EP18829220.5A EP18829220A EP3752398A1 EP 3752398 A1 EP3752398 A1 EP 3752398A1 EP 18829220 A EP18829220 A EP 18829220A EP 3752398 A1 EP3752398 A1 EP 3752398A1
Authority
EP
European Patent Office
Prior art keywords
brake
power
foreign
pressure generator
brake pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP18829220.5A
Other languages
German (de)
English (en)
Inventor
Andreas Weh
Juergen Tandler
Matthias Mayr
Thomas Weitze
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 EP3752398A1 publication Critical patent/EP3752398A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—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
    • B60T8/4081—Systems with stroke simulating devices for driver input
    • 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
    • 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
    • B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
    • B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
    • B60T11/26—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
    • B60T13/66—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
    • B60T2220/00—Monitoring, detecting driver behaviour; Signalling thereof; Counteracting thereof
    • B60T2220/04—Pedal travel sensor, stroke sensor; Sensing brake request
    • 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
    • B60T2270/00—Further aspects of brake control systems not otherwise provided for
    • B60T2270/40—Failsafe aspects of brake control systems
    • B60T2270/403—Brake circuit failure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2400/00—Special features of vehicle units
    • B60Y2400/81—Braking systems

Definitions

  • the invention relates to an electrohydraulic foreign-power vehicle brake system for a land vehicle traveling autonomously on public roads with the features of the preamble of claim 1.
  • level 4 driver can be called in to intervene
  • level 5 highest level, no driver required
  • a third party vehicle brake system with redundancies is necessary, which is a complete failure of the vehicle brake system Probability excludes without the need for driver intervention.
  • the published patent application DE 10 2014 220 440 A1 discloses an electro-hydraulic foreign-power vehicle brake system with two external-pressure brake pressure generators, which are hydraulically connected in series. Each brake pressure generator has an electrically controllable pressure source. Hydraulic wheel brakes are connected to a second of the two brake pressure generator and indirectly through the second brake pressure generator to a first of the two brake pressure generator. If the first brake pressure generator is functional, the wheel brakes are hydraulically loaded with brake pressure by the first brake pressure generator through the second brake pressure generator and actuated in this way. The amount of brake pressure is controlled or regulated by the first brake pressure generator. The second brake pressure generator is passive. If the first brake pressure generator fails, the second brake pressure generator takes over braking. Disclosure of the invention
  • the electrohydraulic, foreign-power vehicle brake system having the features of claim 1, is provided for autonomous driving to lobes 4 and 5 on public roads. It has two external-pressure brake pressure generators, to which one or more hydraulic wheel brakes are connected. Hydraulic wheel brakes can be connected to both external-pressure brake pressure generators and / or the external-force brake-pressure generators have their own hydraulic wheel brakes. Also possible are versions of the vehicle brake system with more than two external-power brake printer generators. With the external force brake pressure generators, a brake pressure for Actuate supply of the connected wheel brakes can be generated, wherein the brake pressure with the external force brake pressure generators and / or with Bremsdruckregelventilanord- voltages is adjustable. A regulation is to be understood as a control. If a foreign-pressure brake pressure generator fails, braking, ie actuation of the wheel brakes connected to the other power-operated brake pressure generator, is possible with the other power-operated brake-pressure generator.
  • each of the foreign-pressure brake pressure generator has a brake fluid reservoir.
  • the foreign-power vehicle brake system has a further brake-fluid reservoir to which the brake-fluid reservoir of the external-pressure brake pressure generator is connected. This increases the availability of the foreign-power vehicle brake system according to the invention in the event of a leak at a basically arbitrary point of the foreign-vehicle brake system.
  • An embodiment of the invention provides an embodiment of at least one of the external force brake pressure generator as a dual-circuit brake pressure generator with hydraulically separated brake circuits or at least the connection of two hydraulically separated brake circuits to the Fremdkraft- brake pressure generator. At least one hydraulic wheel brake is connected to each brake circuit.
  • the dual-circuit design increases the redundancy and Thus, the reliability of the inventive Fremdkraft vehicle brake system and is particularly advantageous if a service brake with one of the two power brake pressure generator and the other Fremdkraft- brake pressure generator is provided for auxiliary braking in case of failure of a Fremdkraft- brake pressure generator.
  • the two-circuit version of the external-power vehicle brake system makes it possible to brake with one of the two external-force brake-pressure generators.
  • a preferred embodiment of the invention provides a plurality of chambers auf josde brake fluid reservoir for at least one of the external power brake pressure generator.
  • the brake fluid reservoir like a conventional multi-chamber brake fluid reservoir of a dual-force master-operated master cylinder, can be subdivided into a plurality of chambers by a kind of bulkhead walls, with a brake circuit being connected to one of the chambers, for example.
  • a brake circuit being connected to one of the chambers, for example.
  • a likewise preferred embodiment of the invention provides that the further brake fluid reservoir, to which the brake fluid reservoir of the external force brake pressure generator are connected, has a brake fluid sensor.
  • a brake fluid level is measurable or at least a drop in the brake fluid level in the further brake fluid reservoir below a specified minimum Bremsflüs- stechniksstand.
  • a leakage of the inventive vehicle power brake system can be determined, no matter where the leak is. Only the presence of a leak, but not where it is, can be determined.
  • each power-brake pressure generator has its own brake fluid reservoir, loses the Bremsschreibkeitsvorratsbe- container or a chamber of the brake fluid reservoir of a Fremdkraft- brake pressure generator to which a dense brake circuit is connected, none Brake fluid. It suffices the brake fluid sensor in the other brake fluid reservoir for detecting a leak at any point of the inventive vehicle power brake system, brake fluid sensors in the brake fluid reservoirs of Fremdkraft Bremstiker- are generators not necessary, although such additional Brems hamperkeits- sensors in the brake fluid reservoir of foreign power -Bremsdrucker- are not excluded.
  • an external power brake printer has an external power piston-cylinder unit for generating brake pressure.
  • This refers to a piston-cylinder unit whose piston in the cylinder or vice versa whose cylinder on the piston to displace Bremsflüs- stechnik and thus to brake pressure generation with foreign force is movable.
  • the piston or the cylinder is moved electromechanically with an electric motor via a screw drive or, in general, a rotational / translational change gear, wherein a mechanical reduction gear can be interposed between the electric motor and the change gear.
  • Other external power drives of the piston or cylinder of the piston-cylinder unit are possible.
  • An embodiment of the invention provides a hydraulic pump, in particular a piston pump or an (internal) gear pump, which is in particular driven by an electric motor, as a foreign-pressure brake pressure generator.
  • a preferred embodiment of the invention provides that the foreign-power piston-cylinder unit and / or the hydraulic pump are connected directly to the brake fluid reservoir, ie without the intermediary of a hydraulic component such as a valve, in particular a solenoid valve is.
  • a hydraulic component such as a valve, in particular a solenoid valve is.
  • Auxiliary power means an actuation of the master cylinder with a brake booster, that is, an operation by muscle power amplified by an amplifier force of the brake booster.
  • the auxiliary power brake must not be confused with the auxiliary brake.
  • the latter is a braking with the other power brake pressure generator in the event of failure of a foreign-pressure brake pressure generator or genge my braking with redundant components or a redundant system in case of failure of one or more components or part of the inventive power-vehicle brake system.
  • the master cylinder allows operation of the foreign-vehicle brake system in a non-autonomous driving or for a driver intervention during an autonomous driving.
  • the master cylinder can be used as a setpoint generator for a Fremdkraftbrem- solution or the vehicle brake system is operated with the brake pressure, which is generated with the master cylinder.
  • An auxiliary braking with the master cylinder is possible, for example in case of failure of a foreign-pressure brake pressure generator.
  • a further development of the invention provides a brake pressure control valve arrangement for regulating the brake pressure in the wheel brakes or for a wheel-specific brake pressure control in the wheel brakes.
  • the brake pressure control valve arrangement can be designed for slip control systems such as anti-lock, traction and / or vehicle dynamics control, anti-skid control systems, electronic stability programs for which the abbreviations ABS, ASR, FDR / ESP are used.
  • FIG. 1 shows a hydraulic circuit diagram of an electro-hydraulic foreign-power vehicle brake system according to the invention.
  • the electrohydraulic third-party vehicle brake system 1 is intended for a land vehicle driving autonomously up to level 4 or 5 on public roads, namely a passenger car.
  • Level 4 means autonomous driving, where a driver can be called to intervene, and level 5, the highest level, an autonomous driving that requires no driver intervention.
  • the foreign-power vehicle brake system 1 has two mutually independent foreign-pressure brake pressure generators 2, 3, each with its own energy supply.
  • One of the two power brake pressure generator 2 has an external power piston-cylinder unit 4 to a brake pressure generation, the piston 5 with an electric motor 6 via a screw 7, for example, a Kugelumlaufge- transmission, in a cylinder 8 is displaced to a brake actuation brake fluid from the cylinder 8 to displace and to generate the brake pressure.
  • the cylinder 8 of the power-piston-cylinder unit 4 is connected to a chamber 9 of a brake fluid reservoir 10, which is divided by partition walls 1 1 in chambers 9.
  • a flow-through in the direction of the cylinder 8 check valve 34 is arranged as an inlet valve in the leading from the brake fluid reservoir 10 to the cylinder 8 brake line, which increases the flow resistance somewhat.
  • a Fremdkraft- brake pressure generator 2 To the foreign-power piston-cylinder unit 4 and thus to a Fremdkraft- brake pressure generator 2 are hydraulically connected in parallel via two external power valves 12 and four intake valves 13, of which two are connected in parallel to the two hydraulic power valves 12, four hydraulic Wheel brakes 14 connected.
  • the power-brake pressure generator 2 is thereby divided from the foreign-power piston-cylinder unit 4 into two independent brake circuits, each with two wheel brakes 14.
  • the external force valves 12 are closed in their currentless basic position and the inlet valves 13 in their normally open position 2/2-way solenoid valves, the inlet valves 13 are designed for better brake pressure control as proportional valves.
  • the external force valves 12 For a foreign-power actuation of the vehicle brake system 1 or its wheel brakes 14 with the foreign-power piston-cylinder unit 4, the external force valves 12 are opened and a brake pressure is generated by displacement of the piston 5 in the cylinder 8 with the electric motor 6.
  • the external-pressure brake pressure generator 2 has an outlet valve 15 which, in the illustrated and described embodiment of the invention, is designed as a 2/2-way solenoid valve closed in its currentless basic position, through which the wheel brakes 14 are connected to chambers 9 of the Bremsflüs- stechniksbehrats essenceers 10.
  • the brake fluid reservoir 10 has a separate chamber 9 for each brake circuit and for the foreign-power piston-cylinder unit 4.
  • a brake pressure in the wheel brakes 14 is selectively controllable with the electric motor 6 of the foreign-power piston-cylinder unit 4 and wheel-individually with the intake valves 13 and the exhaust valves 15, which is to be understood by rules also controlling the brake pressure.
  • the intake valves 13 and the exhaust valves 15 bil the brake pressure control valve arrangements with which in addition to the regulation of the brake pressures in the wheel brakes 14 also slip controls such as anti-lock, traction and driving dynamics and spin control and electronic stability programs are feasible, for which the abbreviations ABS, ASR , FDR and ESP are common. Slip regulations are known to the person skilled in the art and will not be explained in more detail here.
  • the one foreign-pressure brake pressure generator 2 has a muscle-power-actuated dual-circuit master cylinder 16, to which the wheel brakes 14 are connected via a circular selector valve 17 in each brake circuit and via the intake valves 13, so that a brake actuation is also possible with the Hauptbremszy- cylinder 16 with muscle power ,
  • the circular valves 17 are designed as open in their normal position 2/2-way solenoid valves.
  • the master cylinder 16 serves as a setpoint generator for the brake pressure to be generated or regulated and is separated by closing the Kreistrennventile 17 of the intake valves 13.
  • a piston travel of a master brake cylinder piston is measured with a travel sensor 18 and / or a pressure generated in the master brake cylinder 16 is measured with a pressure sensor 19.
  • a pedal travel simulator 20 is connected via a simulator valve 21 to a brake circuit of the master brake cylinder 16.
  • the simulator valves 21 is closed in a foreign power braking.
  • the pedal travel simulator 20 is a piston-cylinder unit with a spring-loaded piston.
  • the other power brake pressure generator 3 of the invention electro-hydraulic foreign-power vehicle brake system 1 is also designed as a dual-circuit brake pressure generator and has in each brake circuit to a hydraulic pump 22, which are drivable together with an electric motor 23.
  • the hydraulic pumps 22 are, for example, piston pumps or (internal) gear pumps. Suction sides of the hydraulic pumps 22 of the other power brake pressure generator 3 are via flow brake lines 24 to the two brake circuits of the master cylinder 16 of the one external power brake pressure generator 2 and pressure sides of the hydraulic pumps 22 of the other power brake pressure generator 3 via return brake lines 25 on the intake valves 13 facing away from the circuit racing valves 17 of an external power brake pressure generator 2 connected.
  • the wheel brakes 14 and thus the foreign-power vehicle brake system 1 can be actuated by the other external-force brake pressure generator 3.
  • a regulation of the wheel brake pressures is possible with the intake valves 13 and the exhaust valves 15 of the one foreign-pressure brake pressure generator 2.
  • the brake actuation with the other power brake pressure generator 3 in the event of failure of a foreign-pressure brake pressure generator 2 is a so-called auxiliary braking.
  • By-pass valves 26 are hydraulically connected in parallel to the hydraulic pumps 22 of the other power brake pressure generator 3, which in the illustrated and described embodiment of the invention are designed as 2/2-way solenoid valves which are open in their currentless basic position. They connect the master brake cylinder 16 of the one foreign-pressure brake pressure generator 2 through the circular dividing valves 17 and the intake valves 13 to the wheel brakes 14, so that the wheel brakes 14 can be actuated by the master brake cylinder 16. In a Fremdkraftbremsung with the other power brake pressure generator 3, the bypass valves 26 are closed.
  • bypass valves 26 of the other power brake pressure generator 3 check valves 27 are hydraulically connected in parallel, which can be traversed by the suction side to the pressure side of the hydraulic pumps 22, so that even with closed bypass valves 26 actuation of the wheel brakes 14 with the one power brake pressure generator 2 possible is.
  • the other power brake pressure generator 3 has its own Bremssupplementary- keitsvorrats essenceer 28, which is divided by a bulkhead 29 into two chambers 30, to which the two hydraulic pumps 22 are connected.
  • the hydraulic pumps 22 of the other power brake pressure generator 3 are connected directly and thereby with low flow resistance to the Brems disruptkeitsvorratsbe- container 28, whereby a fast brake pressure build-up is ensured even with cold and consequently viscous brake fluid.
  • the electrohydraulic power-operated vehicle brake system 1 has a further brake fluid reservoir 31 to which the two brake fluid reservoirs 10, 28 of the two foreign-pressure brake pressure generating devices ger 2, 3 are connected via a connection with a T-piece 32 or a branch. Also possible is a further brake fluid reservoir 31, which for each brake fluid reservoir 10, 28 of the external power brake pressure generator 2, 3 has its own connection (not shown). The further brake fluid reservoir 31 has no bulkheads and is not divided into chambers.
  • the further brake fluid reservoir 31 has a brake fluid sensor 33 with which a brake fluid level can be measured or a decrease in the brake fluid level can be detected at or below a predetermined minimum brake fluid level. As a result, a leakage of the foreign-power vehicle brake system 1 can be detected, regardless of where the foreign-power vehicle brake system 1 is leaking.
  • each power brake pressure generator 2, 3 has its own brake fluid reservoir 10, 28, which are also divided into chambers 9, 30, the inventive foreign-power vehicle brake system 1 in a leaks, no matter where it occurs, functional , it can be operated with at least one of the two power brake pressure generators 2, 3. Due to the additional division into two brake circuits in both power brake pressure generators 2, 3, the availability of the foreign-power vehicle brake system 1 is further increased.
  • the two power-brake pressure generators 2, 3 are designed as assemblies to which the brake fluid reservoir 10, 28 are arranged or to which the brake fluid reservoir 10, 28 are placed as in a conventional master cylinder. An arrangement of one or both of the brake fluid reservoirs 10, 28 that is separate from the subassemblies is also possible.
  • the assembly of the one power brake pressure generator 2 has, in addition to the power piston-cylinder unit 4, the master cylinder 16, the brake pressure control valve assembly with the intake valves 13 and the exhaust valves 15, the power valves 12, the circular valves 17 and the pedal travel simulator 20 with the simulator valve 21 on.
  • the assembly of the other power brake pressure generator 3 has the two hydraulic pumps 22 with the electric motor 23, the bypass valves 26 and the check valves 27.

Landscapes

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

Abstract

L'invention concerne un système de freinage pour véhicule assisté par une force extérieure (1) électrohydraulique pour un véhicule de tourisme se déplaçant de manière autonome sur des routes publiques. L'invention propose deux générateurs de pression de freinage assistés par une force extérieure (2, 3) indépendants l'un de l'autre, dont l'un comporte de préférence une unité piston-cylindre assistée par une force extérieure (4) pouvant être entraînée de manière électromécanique et l'autre comporte de préférence deux pompes hydrauliques (22). Chaque générateur de pression de freinage assisté par une force extérieure (2, 3) comporte un réservoir de liquide de freinage (10, 28) divisé de préférence en chambres (9, 30), qui sont raccordés conjointement à un autre réservoir de liquide de freinage (31), qui de préférence n'est pas divisé en chambres. L'autre réservoir de liquide de freinage (31) comporte de préférence un capteur (33) de liquide de freinage, qui permet de constater une perte de liquide de freinage liée à un défaut d'étanchéité d'un emplacement quelconque du système de freinage pour véhicule assisté par une force extérieure (1). Les réservoirs de liquide de freinage (10, 28) entraînent à travers de courts conduits de faibles résistances à l'écoulement et ainsi l'établissement rapide d'une pression de freinage également en cas de liquide de freinage froid et, par conséquent, en cas de liquide de freinage visqueux.
EP18829220.5A 2018-02-15 2018-12-06 Système de freinage pour véhicule électrohydraulique assisté par une force extérieure pour un véhicule routier à déplacement autonome Withdrawn EP3752398A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018202287.9A DE102018202287A1 (de) 2018-02-15 2018-02-15 Elektrohydraulische Fremdkraft-Fahrzeugbremsanlage für ein autonom fahrendes Landfahrzeug
PCT/EP2018/083834 WO2019158242A1 (fr) 2018-02-15 2018-12-06 Système de freinage pour véhicule électrohydraulique assisté par une force extérieure pour un véhicule routier à déplacement autonome

Publications (1)

Publication Number Publication Date
EP3752398A1 true EP3752398A1 (fr) 2020-12-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP18829220.5A Withdrawn EP3752398A1 (fr) 2018-02-15 2018-12-06 Système de freinage pour véhicule électrohydraulique assisté par une force extérieure pour un véhicule routier à déplacement autonome

Country Status (6)

Country Link
US (1) US20210070267A1 (fr)
EP (1) EP3752398A1 (fr)
KR (1) KR20200118176A (fr)
CN (1) CN111699118A (fr)
DE (1) DE102018202287A1 (fr)
WO (1) WO2019158242A1 (fr)

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DE102018009370A1 (de) * 2018-11-29 2020-06-04 Zf Active Safety Gmbh Elektrohydraulische Fahrzeug-Bremsanlage mit redundanter Hydraulikdruckerzeugung und Verfahren zum Betreiben der Bremsanlage
DE102019206707A1 (de) 2019-05-09 2020-11-12 Robert Bosch Gmbh Verfahren zur Steuerung einer elektronisch schlupfregelbaren Fremdkraftbremsanlage, insbesondere für ein pilotiert fahrendes Kraftfahrzeug und pilotiert fahrendes Kraftfahrzeug
DE102021201536A1 (de) * 2021-02-18 2022-08-18 Robert Bosch Gesellschaft mit beschränkter Haftung Elektrohydraulische Fremdkraftbremsanlage für ein autonom fahrendes Kraftfahrzeug
CN115158249B (zh) * 2021-04-06 2023-12-22 芜湖伯特利汽车安全系统股份有限公司 一种应对解耦失效的车辆制动方法
DE102021208783A1 (de) * 2021-08-11 2023-02-16 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zum Entlüften eines Zylinders einer Kolben-Zylinder-Einheit eines Fremdkraft-Bremsdruckerzeugers einer hydraulischen Fremdkraft-Bremsanlage
KR102615259B1 (ko) * 2021-10-27 2023-12-19 에이치엘만도 주식회사 차량 제동 시스템 및 이의 제어 방법
DE102022213919A1 (de) * 2022-01-07 2023-07-13 Continental Automotive Technologies GmbH Bremsanlage für ein Kraftfahrzeug

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KR20200118176A (ko) 2020-10-14
DE102018202287A1 (de) 2019-08-22
CN111699118A (zh) 2020-09-22
WO2019158242A1 (fr) 2019-08-22

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