EP4237296A1 - Procédé pour réaliser un test de fonctionnement dans un système de freinage hydraulique à énergie non musculaire d'un véhicule - Google Patents

Procédé pour réaliser un test de fonctionnement dans un système de freinage hydraulique à énergie non musculaire d'un véhicule

Info

Publication number
EP4237296A1
EP4237296A1 EP21782478.8A EP21782478A EP4237296A1 EP 4237296 A1 EP4237296 A1 EP 4237296A1 EP 21782478 A EP21782478 A EP 21782478A EP 4237296 A1 EP4237296 A1 EP 4237296A1
Authority
EP
European Patent Office
Prior art keywords
brake
pressure
hydraulic
valves
valve
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Withdrawn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
EP21782478.8A
Other languages
German (de)
English (en)
Inventor
Ralf Kinder
Anatoly MALKIN
Sabrina LUTZ
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 EP4237296A1 publication Critical patent/EP4237296A1/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Withdrawn legal-status Critical Current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
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • B60T17/221—Procedure or apparatus for checking or keeping in a correct functioning condition of 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
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18—Safety devices; Monitoring
    • B60T17/22—Devices for monitoring or checking brake systems; Signal devices
    • B60T17/221—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems
    • B60T17/222—Procedure or apparatus for checking or keeping in a correct functioning condition of brake systems by filling or bleeding of 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
    • B60T8/88—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 with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means
    • B60T8/885—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 with failure responsive means, i.e. means for detecting and indicating faulty operation of the speed responsive control means using electrical circuitry
    • 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
    • B60T2270/406—Test-mode; Self-diagnosis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
    • B60Y2306/00—Other features of vehicle sub-units
    • B60Y2306/15—Failure diagnostics
    • 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 a method for carrying out a function test in a pressure generation module of a hydraulic vehicle brake system, in particular a vehicle brake system having slip control, which uses the pressure generation module to generate a brake pressure with external force and a pressure control module to control the brake pressure and/or to control slip, which is connected to the pressure generating module is connected.
  • the published application DE 10 2016 201 047 A1 discloses a hydraulic externally powered vehicle brake system with slip control, which has an electrohydraulic externally powered brake pressure generator in a pressure generating module and a pressure control module having solenoid valves and return pumps for slip control, which is connected to the pressure generating module.
  • the known vehicle brake system has a master brake cylinder that is integrated into the pressure generation module.
  • the published application DE 10 2018 212 850 A1 discloses a method for testing the operability of a slip-controlled hydraulic external vehicle brake system.
  • brake fluid is pumped separately into an unpressurized brake fluid reservoir by an externally powered brake pressure generator through a non-actuated master brake cylinder.
  • a non-opening separating valve through which a brake circuit is connected to the master brake cylinder and which is not necessarily noticed when service braking is carried out as power braking, is detected by a pressure increase using the procedure for testing the functionality of the vehicle brake system.
  • a disadvantage of the known method is that brake fluid The pressure from the power brake pressure generator flows through open inlet valves into the hydraulic wheel brakes of the vehicle brake system, which delays pressure build-up and impairs the test. In order to prevent this volume outflow, the inlet valves of hydraulic wheel brakes in the relevant brake circuit can be closed during the test.
  • the method according to the invention with the features of claim 1 is provided for carrying out a function test in a pressure generation module of a hydraulic, externally powered vehicle brake system, which preferably has a slip control system.
  • the function test is used to test the functionality of the pressure generation module or hydraulic components, for example solenoid valves or check valves of the pressure generation module.
  • the pressure generation module has an in particular electrohydraulic externally powered brake pressure generator.
  • the external force brake pressure generator has, for example, a piston-cylinder unit, the piston of which is used to generate a brake pressure with external force by means of an electric motor via a helical gear or another rotary /? ranslations-converter transmission is displaceable in a cylinder of the piston-cylinder unit.
  • Another option for an externally powered brake pressure generator is a hydraulic pump that can be driven by an electric motor, for example a piston pump or an (internal) gear pump.
  • the pressure control module is connected to the pressure generation module by a connecting valve, which can be integrated into the pressure generation module or into a pressure control module.
  • the pressure control module is used to control the brake pressure and preferably a slip control, it has valves, in particular solenoid valves such as inlet valves and outlet valves for hydraulic wheel brakes, which are connected to the pressure control module, and optionally other hydraulic components, such as hydraulic accumulators and / or hydraulic pumps.
  • the connecting valve is normally present in third-party vehicle brake systems with a pressure generator module and a pressure control module, which is why the method according to the invention normally does not additional valve and no other modification of the respective power vehicle brake system required.
  • the slip control is in particular an anti-lock, traction slip and/or driving dynamics control, for which the abbreviations ABS, ASR and/or FDR are used.
  • ABS anti-lock, traction slip and/or driving dynamics control
  • ASR ASR
  • FDR FDR
  • a brake pressure is generated with the externally-powered brake pressure generator and/or brake fluid is pumped with the externally-powered brake-pressure generator or displaced from the externally-powered brake pressure generator.
  • the invention provides for brake pressure in the pressure control module with the power brake pressure generator or a hydraulic pump of the pressure control module and preferably also in the wheel brakes and then selectively to close the connection valve, through which the pressure control module is connected to the pressure generation module, and/or the inlet valves of the wheel brakes.
  • the pressure control module or at least the wheel brakes are thereby hydraulically separated from the pressure generation module and the brake pressure is included in the pressure control module or at least in the wheel brakes.
  • the function test is then carried out in the pressure generation module, whereby the generation of the brake pressure with the power brake pressure generator and the inclusion of the brake pressure in the pressure control module or in the wheel brakes can be regarded as components of the function test or as process steps that prepare the function test.
  • the hydraulic brake pressure in the vehicle brake system can be measured while the function test is being carried out.
  • a dependency of the pressure profile on a quantity of brake fluid delivered by the externally powered brake pressure generator is assessed, which is different when the vehicle brake system is functional than when the valves are not switching as intended, for example.
  • the invention avoids the function test in the pressure generation module being influenced by the pressure control module or the hydraulic wheel brakes.
  • the function test is used, for example, to check the functionality of hydraulic components of the pressure-generating module.
  • the invention is explained in more detail below with reference to the drawing.
  • the single figure shows a hydraulic circuit diagram of a vehicle brake system that is powered by an external vehicle for carrying out the method according to the invention.
  • the hydraulic externally powered vehicle brake system 1 shown in the drawing is a dual-circuit vehicle brake system with slip control.
  • the vehicle brake system 1 has a pressure generation module 2 and a pressure control module 3 which is connected to the pressure generation module 2 .
  • Hydraulic wheel brakes 22 are connected to the pressure control module 3 .
  • the pressure generation module 2 has an external power brake pressure generator 4 with a piston-cylinder unit 5, the piston 6 for generating a brake pressure with external power by means of an electric motor 7 via a helical gear 8 in a cylinder 9 of the piston-cylinder unit 5 of the external power Brake pressure generator 4 is displaceable.
  • the piston-cylinder unit 5 or the power brake pressure generator 4 as a whole can also be referred to as a plunger unit, its piston 6 as a plunger piston and its cylinder 9 as a plunger cylinder.
  • the pressure generation module 2 has a dual-circuit master brake cylinder 10, which can be actuated with muscle power by means of a foot brake pedal 11 or optionally by means of a hand brake lever (not shown).
  • the master brake cylinder 10 serves as a setpoint generator for the brake pressure to be generated by the externally powered brake pressure generator 4 .
  • a pressure sensor 12 is connected to the master brake cylinder 10 for this purpose.
  • master brake cylinder 10 is hydraulically separated from the rest of the vehicle brake system 1 by closing isolating valves 18 .
  • a pedal travel simulator 13 is connected to master brake cylinder 10 via a simulator valve 14 .
  • the pedal travel simulator 13 is a piston-cylinder unit with a spring-loaded piston into whose cylinder the brake fluid can be displaced from the master brake cylinder 10 when the isolating valves 18 are closed and the simulator valve 14 is open.
  • the master brake cylinder 10 and the pedal travel simulator 13 are integrated in the pressure generation module 2 like the externally powered brake pressure generator 4 .
  • an unpressurized brake fluid reservoir 15 is placed, to which the master cylinder 10 and the cylinder 9 of the power brake pressure generator 4, the latter through a power valve 16, are connected.
  • the pressure generation module 2 has in each brake circuit both for the externally powered brake pressure generator 4 and for the master brake cylinder 10 an isolating valve 17, 18, through which the pressure control module 3 is connected to the pressure generation module 2 or the brake circuits of the pressure control module 3 are connected to the brake circuits of the pressure generation module 2 are.
  • check valves 19 are integrated into the pressure generation module 3, the brake fluid reservoir 15 with the external power Connect brake pressure generator 4 and the master cylinder 10 facing away from the sides of the isolation valves 17, 18 and the brake fluid reservoir 15 in the direction of the isolation valves 17, 18 and thus to the pressure control module 3 can flow through.
  • the pressure generation module 2 has a pressure sensor 20 which is connected to the cylinder 9 of the power brake pressure generator 4 .
  • the pressure control module 3 is connected to the pressure generation module 2 in each brake circuit by a connection valve 21 .
  • the hydraulic wheel brakes 22 are each connected to the pressure control module 3 by an inlet valve 23 .
  • the vehicle brake system 1 has four wheel brakes 22, two of which are connected to a brake circuit.
  • each brake circuit the wheel brakes 22 are connected through an outlet valve 24 for each wheel brake 22 to a suction side of a hydraulic pump 25, which can also be referred to as a return pump.
  • the vehicle brake system 1 has a hydraulic pump 25 in each brake circuit, which can be driven together with an electric motor 26 . Pressure sides of the hydraulic pumps 25 are connected between the connection valves 21 and the inlet valves 23 .
  • the suction sides of the hydraulic pumps 25 are connected to the pressure generation module 2 by an intake valve 27 in each brake circuit, so that the hydraulic pumps 25 of the pressure control module 3 can pump brake fluid from the brake fluid reservoir 15 through the check valves 19 in the pressure generation module 2 and the suction valves 27 in the pressure control module 3 can suck.
  • the connecting valves 21, inlet valves 23, outlet valves 24 and the intake valves and the hydraulic pumps 25 are integrated into the pressure control module 3.
  • the hydraulic pumps 25, inlet valves 23 and outlet valves 24 form brake pressure control valve arrangements with which wheel-specific slip control such as anti-lock control, traction control and vehicle dynamics control can be carried out.
  • wheel-specific slip control such as anti-lock control, traction control and vehicle dynamics control can be carried out.
  • slip controls are usually associated with ABS, ASR and FDR abbreviated. Such slip regulations are known and are not explained here.
  • the simulator valve 14, the external power valve 16, the isolating valves 17, 18, the connection valves 21, the inlet valves 23, the outlet valves 24 and the intake valves 27 are 2/2-way solenoid valves, the isolating valves 18 of the master brake cylinder 10, the connection valves 21 and the inlet valves 23 are open in their currentless basic positions and the simulator valve 14, the power valve 16, the outlet valves 24 and the intake valves 27 are closed in their currentless basic positions.
  • a brake pressure is generated with the externally powered brake pressure generator 4 according to the invention.
  • the isolating valves 17 of the externally powered brake pressure generator 4, the connection valves 21 and the inlet valves 24 are or are opened, so that the brake pressure generated by the externally powered brake pressure generator 4 acts on the pressure control module 3 and the wheel brakes 22.
  • the isolating valves 18 of the master brake cylinder 10 are closed so that no brake fluid is displaced from the cylinder 9 of the externally powered brake pressure generator 4 into the master brake cylinder 10 and through the master brake cylinder 10 into the brake fluid reservoir 15 .
  • the outlet valves 24 remain closed so that no brake fluid escapes from the wheel brakes 22 .
  • connection valves 21 are then closed so that the pressure control module 3 is hydraulically separated from the pressure generation module 2 or the wheel brakes 22 are hydraulically separated from the pressure control module 3 and the brake pressure is “locked in” in the pressure control module 3 or in the wheel brakes 22, so to speak.
  • the inlet valves 23 can also be closed if no hydraulic check valve is connected in parallel with them.
  • the function test of the pressure generation module 2 can now be carried out without brake fluid flowing from the pressure generation module 2 into the pressure control module 3 or at least into the wheel brakes 22, which would affect a pressure measurement in the pressure generation module 2 during the function test and disrupt the function test or even prevent it. be measured For example, a pressure build-up with the externally powered brake pressure generator 4, whether the brake pressure is maintained, i.e. whether the isolating valves 17, 18 and the check valves 19 are tight, and whether the brake pressure drops when the isolating valves 17, 18 are opened, i.e. whether open the isolating valves 17, 18 as intended.
  • the brake pressure trapped in the pressure control module 3 and/or in the wheel brakes 22 prevents brake fluid from flowing out of the pressure generation module 2 into the pressure control module 3 or into the wheel brakes 22.
  • a vehicle equipped with the vehicle brake system 1 should be stationary during the function test because the vehicle brake system 1 is pressurized during the function test and therefore no regular actuation of the wheel brakes 22 is possible or an actuation of the vehicle brake system 1 would interrupt the function test.

Landscapes

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

Abstract

Pour permettre de réaliser un test de fonctionnement dans un module de génération de pression (2) d'un système de freinage hydraulique à énergie non musculaire (1) d'un véhicule, une pression de freinage est générée au moyen d'un générateur de pression de freinage à énergie non musculaire (4), puis un module de régulation de pression (3) est séparé hydrauliquement du module de génération de pression (2) par fermeture de soupapes de raccordement (21) ou des freins de roue hydrauliques (22) sont séparés hydrauliquement dudit module de génération de pression par fermeture de soupapes d'admission (23) de telle sorte que, pendant le test de fonctionnement, aucun liquide de frein ne s'écoule dans les freins de roue (22), ce qui abaisserait sinon la pression de freinage dans le module de génération de pression (2) et compromettrait ou empêcherait le test de fonctionnement.
EP21782478.8A 2020-11-02 2021-09-20 Procédé pour réaliser un test de fonctionnement dans un système de freinage hydraulique à énergie non musculaire d'un véhicule Withdrawn EP4237296A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020213766.8A DE102020213766A1 (de) 2020-11-02 2020-11-02 Verfahren zur Durchführung eines Funktionstests in einer hydraulischen Fremdkraft-Fahrzeugbremsanlage
PCT/EP2021/075781 WO2022089835A1 (fr) 2020-11-02 2021-09-20 Procédé pour réaliser un test de fonctionnement dans un système de freinage hydraulique à énergie non musculaire d'un véhicule

Publications (1)

Publication Number Publication Date
EP4237296A1 true EP4237296A1 (fr) 2023-09-06

Family

ID=77989797

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21782478.8A Withdrawn EP4237296A1 (fr) 2020-11-02 2021-09-20 Procédé pour réaliser un test de fonctionnement dans un système de freinage hydraulique à énergie non musculaire d'un véhicule

Country Status (7)

Country Link
US (1) US12291177B2 (fr)
EP (1) EP4237296A1 (fr)
JP (1) JP7618794B2 (fr)
KR (1) KR20230098615A (fr)
CN (1) CN116507533A (fr)
DE (1) DE102020213766A1 (fr)
WO (1) WO2022089835A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7491001B2 (ja) * 2020-03-19 2024-05-28 株式会社アドヴィックス 車両用制動装置

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112004000969D2 (de) * 2003-07-08 2006-04-13 Continental Teves Ag & Co Ohg Vorrichtung und Verfahren zur Bestimmung von hydraulischen Fehlern in elektrohydraulischen Bremssystemen
JP4631660B2 (ja) * 2005-11-11 2011-02-16 トヨタ自動車株式会社 ブレーキ制御装置
JP4730127B2 (ja) * 2006-02-22 2011-07-20 日産自動車株式会社 車両用ブレーキ装置
JP2008049957A (ja) * 2006-08-28 2008-03-06 Hitachi Ltd ブレーキ装置
WO2011024309A1 (fr) * 2009-08-31 2011-03-03 トヨタ自動車株式会社 Système de frein à pression de fluide
JP5240261B2 (ja) * 2010-09-13 2013-07-17 トヨタ自動車株式会社 ブレーキ制御装置
DE102012221770B4 (de) * 2012-05-14 2014-08-28 Ford Global Technologies, Llc Prüfverfahren für eine Bremsanlage
CN105143001B (zh) * 2013-03-29 2019-02-19 日立汽车系统株式会社 制动装置及该制动装置的配管内的大气混入检测方法
DE102016201047A1 (de) 2015-01-29 2016-08-04 Continental Teves Ag & Co. Ohg Bremsanlage für Kraftfahrzeuge
DE102015106089A1 (de) * 2015-04-21 2016-10-27 Ipgate Ag Diagnoseverfahren für ein Bremssystem
DE102015219905A1 (de) * 2015-10-14 2017-04-20 Continental Teves Ag & Co. Ohg Verfahren zur Bestimmung einer Leckage eines hydraulischen Bremssystems eines Fahrzeugs
KR20170065827A (ko) * 2015-12-04 2017-06-14 주식회사 만도 전자식 브레이크 시스템 및 이의 누설 검사방법
DE102016112971A1 (de) * 2016-07-14 2018-01-18 Ipgate Ag Diagnoseverfahren für mindestens eine Komponente eines Kraftfahrzeugs
US20200339096A1 (en) * 2017-12-31 2020-10-29 ZF Active Safety US Inc. Vehicle brake system and method of determining leakage thereof
DE102018212018A1 (de) * 2018-07-19 2020-01-23 Robert Bosch Gmbh Verfahren zur Dichtheitsprüfung einer hydraulischen Fahrzeugbremsanlage
DE102018212016A1 (de) * 2018-07-19 2020-01-23 Robert Bosch Gmbh Verfahren zu einer Prüfung einer hydraulischen Fahrzeugbremsanlage auf Dichtheit
DE102018212850A1 (de) * 2018-08-01 2020-02-06 Robert Bosch Gmbh Verfahren zur Prüfung der Funktionsfähigkeit einer hydraulischen Fahrzeugbremsanlage
DE102018009370A1 (de) * 2018-11-29 2020-06-04 Zf Active Safety Gmbh Elektrohydraulische Fahrzeug-Bremsanlage mit redundanter Hydraulikdruckerzeugung und Verfahren zum Betreiben der Bremsanlage
US11767005B2 (en) * 2020-08-21 2023-09-26 GM Global Technology Operations LLC Test sequence for brake system

Also Published As

Publication number Publication date
JP2023547094A (ja) 2023-11-09
US12291177B2 (en) 2025-05-06
DE102020213766A1 (de) 2022-05-05
WO2022089835A1 (fr) 2022-05-05
KR20230098615A (ko) 2023-07-04
JP7618794B2 (ja) 2025-01-21
US20230127912A1 (en) 2023-04-27
CN116507533A (zh) 2023-07-28

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