WO1996001985A1 - Procede et dispositif de controle d'un systeme antiblocage pour freins de vehicules actionnes par un fluide sous pression - Google Patents

Procede et dispositif de controle d'un systeme antiblocage pour freins de vehicules actionnes par un fluide sous pression Download PDF

Info

Publication number
WO1996001985A1
WO1996001985A1 PCT/EP1995/002537 EP9502537W WO9601985A1 WO 1996001985 A1 WO1996001985 A1 WO 1996001985A1 EP 9502537 W EP9502537 W EP 9502537W WO 9601985 A1 WO9601985 A1 WO 9601985A1
Authority
WO
WIPO (PCT)
Prior art keywords
control system
pedal
brake
pressure
test device
Prior art date
Application number
PCT/EP1995/002537
Other languages
German (de)
English (en)
Inventor
Herbert Kallinich
Original Assignee
Herbert Kallinich
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 Herbert Kallinich filed Critical Herbert Kallinich
Publication of WO1996001985A1 publication Critical patent/WO1996001985A1/fr

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/22—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers
    • G01L5/225—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring the force applied to control members, e.g. control members of vehicles, triggers to foot actuated controls, e.g. brake pedals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
    • G01L5/28—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for testing brakes

Definitions

  • the invention relates to a method for checking an anti-lock control system in the case of pressure-operated vehicle brakes on the basis of the current brake pressure in the brake system, the anti-lock control system having a control unit which is in control connection with brake pressure control valves assigned to individual wheels.
  • the invention also relates to a test device for checking an anti-lock control system in the case of pressure-operated vehicle brakes on the basis of the current brake pressure in the brake system.
  • the known anti-lock control systems adjust the brake pressure of each wheel according to its adhesion to the road so that the wheels are prevented from locking during the response of the control system when braking.
  • these anti-blocking systems have a plurality of speed wheel sensors, which are each assigned to individual wheels and whose speed impulses are forwarded to an electronic control unit. By continuously comparing the signals coming from each wheel with a reference speed, the acceleration or deceleration of the vehicle wheels is calculated by the control unit.
  • the control unit is in control connection with a hydraulic unit which has a hydraulic pump for changing the brake pressure and brake pressure control valves which are assigned to individual wheels.
  • the assignment of the brake pressure control valves can be provided such that the anti-lock control system has a brake pressure control valve for both front wheels of the vehicle and for its rear wheels, or that the control system has a brake pressure control valve for each of the vehicle wheels.
  • the slip occurring at the individual wheels is determined from the comparison of the wheel speeds with the reference speed and, with increasing slip, a wheel's tendency to lock is determined.
  • the corresponding brake pressure control valve is switched to pressure reduction and the pressure in the wheel brake cylinder is reduced until the wheel turns faster again. If a predetermined wheel speed is subsequently exceeded, the brake pressure is increased again by means of the hydraulic pump until a tendency to lock is found again. This control cycle is repeated continuously during braking until the vehicle has fallen below a control speed and is fully braked.
  • a device of the type mentioned at the outset has also already been created to determine the brake pressure curve controlled by the brake pressure control valves in the hose lines leading from the master brake cylinder to the wheel brake cylinders (cf. DE-OS 23 08 694).
  • the known device is designed as pliers, the first pair of legs of which comprises the hose line in a rubber-elastic partial area and the second pair of legs of which has a mechanical-electrical converter.
  • the hose line is stretched in its elastic partial area, so that the leg section of the first pair of legs of the pliers changes.
  • This change in distance of the first pair of legs is a
  • the change in distance of the second pair of legs is detected by the electrical-mechanical transducer, which delivers an electrical signal in accordance with the pressure curve in the hose line.
  • this known device can only measure the pressure curve in the brake line leading to one wheel or pair of wheels at the same time. If the pressure build-up in the brake lines leading to the other wheels is also to be measured, this previously known device must be dismantled and implemented. The checking of an anti-lock control system with the aid of this previously known device is, inter alia, therefore associated with a not inconsiderable effort.
  • the solution according to the invention in the method of the type mentioned at the outset is, in particular, that the actuation frequency of at least one control valve assigned to a wheel is measured as a brake pressure-dependent change in pedal travel when the anti-lock control system is activated on the brake pedal itself.
  • the anti-lock control system regulates the brake pressure in the individual wheel brake cylinders in the manner described above as a function of wheel acceleration and wheel deceleration by means of corresponding control commands to the brake pressure control valves. If an increasing tendency to lock is found on a wheel, the corresponding control valve is switched to pressure reduction and the pressure in the wheel brake cylinder in question is reduced. If the wheel then turns faster than a specified wheel speed, the brake pressure on the wheel in question is over the Pump and the corresponding control valve increased again. This control cycle is repeated continuously at a frequency of approximately 6 to 10 cycles per second. These cycles can also be felt as fluttering movements on the brake pedal.
  • these control cycles and the resulting fluttering movements of the brake pedal on the brake pedal itself are measured as changes in the pedal travel dependent on the brake pressure.
  • all wheels of a motor vehicle can be checked with little effort with regard to the proper functioning of the anti-lock control system.
  • the anti-lock control system is checked completely independently of whether the respective motor vehicle has a three-channel or a four-channel system.
  • a measuring section with one each Slip surface can be provided per track, which the motor vehicle passes through in two test runs.
  • a measuring section which has a sliding surface for each of the motor vehicle wheels, these sliding surfaces on the measuring section preferably being arranged with respect to one another in such a way that the wheel to be tested is on the assigned sliding surface while the other wheels are on driving on a road surface with a higher coefficient of friction.
  • the opening and closing frequency is only measured for the control valves assigned to the front wheels and if for this purpose, the control valve of one and the control valve of the other front wheel is checked in a first step by braking the vehicle.
  • the proper functioning of the anti-lock control system can be achieved not only with comparatively little effort, but also within a very short time.
  • test device has a sensor for detecting the pedal movements when the control system responds, and that the sensor is connected to an evaluation device.
  • the vehicle can also roll, for example, on a conventional roller test bench, in which at the same time only one of the roller arrangements slips through, for example by spraying water checking wheel allowed.
  • the test device according to the invention can be operated, for example, in connection with an active roller test stand, which has a corresponding rotatably driven roller arrangement for all four wheels or only for the two front or two rear wheels. By reducing the speed of one of these roller assemblies, a smooth surface with a lower coefficient of friction can be simulated, while the other roller assembly or the other roller assemblies specify the reference speed of the corresponding wheels.
  • roller dynamometer for all four wheels can be used practically independently of any motor vehicle
  • a roller dynamometer is only to be provided for the two front or rear wheels in such motor vehicles, the brake system of which each has a test mode for checking the anti-lock control system with regard to the front wheels on the one hand and with respect to the rear wheels allowed on the other hand.
  • test device is assigned a measuring section which has at least one vehicle lane, each with at least one sliding surface.
  • the anti-lock control system can be checked on this test section while the vehicle is traveling, the corresponding wheel being braked on the sliding surface.
  • each vehicle lane is assigned a sliding surface and if the sliding surfaces are spaced apart in the direction of travel.
  • the sensor is also designed as a pedal force transducer and that the test function of the transducer can preferably be switched from a check of the anti-lock control system to a pedal force measurement and vice versa.
  • a pedal force transducer known per se can also be used as a sensor for detecting the pedal movements.
  • the pulses transmitted by this pedal travel sensor can be used via a data processing system using appropriate software to check the brakes and for a corresponding pedal force measurement or to check the anti-lock control system. However, it is expedient if these pulses are evaluated by appropriate circuits, the circuit required for measuring the pedal force or the circuit necessary for checking the ABS system being controllable by switching over the test functions.
  • a preferred embodiment according to the invention provides that the pedal force transducer has at least one strain gauge for measuring changes in pedal force and / or pedal travel.
  • the evaluation device has at least one screen, a printer, a display panel or similar data output and if the evaluation device is designed as an electronic data processing system.
  • a wireless transmission preferably a radio link
  • This transmission of the pulses detected by the sensor can basically be made via an infrared or similar wireless connection.
  • Uncomplicated and interference-free data transmission is favored, however, if the sensor and the evaluation device are connected to one another by radio.
  • Fig. 1 shows the structure of a test device for checking an anti-lock control system in pressure-operated
  • FIG. 2 shows a block diagram of a sensor of the test device from FIG. 1, the sensor being used to detect the pedal movements when the anti-lock control system responds.
  • FIG. 1 shows a test device 1 for checking an anti-lock control system in hydraulic motor vehicle brake systems.
  • the rotational speed of the wheels 3 is continuously determined by speed wheel sensors, which are each assigned to individual wheels 3.
  • the determined rotational speed is reported by the rotational speed wheel sensors to a control unit of the anti-lock control system 4 (not shown in more detail here).
  • This control unit of the ABS system 4 processes the information independently of one another and continuously calculates the values for rotational speed and slip. If a wheel becomes blocked, the control unit issues control commands to a brake pressure control valve designed as a solenoid valve. The brake pressure is initially kept at the level reached.
  • the brake pressure control valve assigned to the wheel in question is switched to pressure reduction and the brake pressure in the brake line 5 provided between the master brake cylinder and the wheel brake cylinder of this wheel is reduced. If the wheel in question is then accelerated beyond a predetermined wheel speed, the brake pressure is increased by means of a hydraulic pump when the brake pressure control valve is in the appropriate position until a tendency to lock is found again. This control cycle is repeated continuously during braking until the vehicle 2 has fallen below a control speed and is fully braked.
  • the test device 1 shown here is based on the knowledge that this control cycle of the ABS system is noticeable by a fluttering movement of the brake pedal 6 and that the actuation frequency of at least one control valve assigned to a wheel 3 can be measured as a brake pressure-dependent change in pedal travel when the anti-lock control system on the brake pedal 6 responds .
  • the test device 1 has a sensor 7 for detecting the pedal movements when the control system responds, the sensor 7 being designed here as a pedal force transducer which is conventional per se.
  • the changes in travel of the brake pedal 6 are detected by at least one strain gauge.
  • a test section is assigned to the test device 1, which has a sliding surface 8 for each vehicle lane. In order to be able to examine the two front wheels of motor vehicle 2 separately from one another with regard to the proper functioning of the anti-lock control system, the sliding surfaces 8 are spaced apart from one another in the direction of travel.
  • sliding surfaces can each be formed, for example, by a metal road surface provided in a partial area of the measuring section, the frictional resistance of which is further reduced by water wetting.
  • the anti-lock control system When the selected wheel is braked on the corresponding sliding surface 8, the anti-lock control system responds at a corresponding speed and triggers the control cycle described above. This control cycle is also noticeable on the brake pedal itself as fluttering movements of the pedal.
  • sensor 7 This sensor 7 is part of a transmission unit shown in FIG. 2, which is connected to a stationary evaluation device of the test device 1 via a wireless data connection, preferably via a UHF radio connection.
  • the pulses detected by the sensor 7 are amplified in the transmitter unit 9 and, after the pulses have been processed, are forwarded via the UHF transmitter to the radio receiver of the evaluation device (not shown here).
  • the evaluation device has at least one screen 10, a printer 11, a display panel 12 or the like data output.
  • the evaluation device has an electronic data processing system, which is designed here as a personal computer 14 which is conventional per se. A comparison of the control cycles of the ABS system determined by the sensor 7 on the brake pedal 6 with a target value specific to a motor vehicle allows a conclusion to be drawn about the correct functioning of the anti-lock control system.
  • the functional check of the ABS system 4 can be carried out with the test device 1 with comparatively little effort. Since, in the test device 1 shown here, the sensor provided for detecting the changes in the pedal travel is simultaneously designed as a conventional pedal force transducer, the test device can also be used to check the brakes and the pedal force required when braking. The impulses determined by the pedal force transducer 7 during the ABS check or during the pedal force measurement are processed via separate circuits of the transmitter unit 9 shown in FIG Button 13 is switchable.
  • the test device 1 allows a direct and comprehensive check of the ABS system 4 of a motor vehicle 2.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Regulating Braking Force (AREA)

Abstract

L'invention concerne un procédé et un dispositif de contrôle d'un système antiblocage pour freins de véhicules actionnés par un fluide sous pression, utilisant la pression de freinage existant dans le système, dans lequel le système antiblocage (système ABS) présente une unité de commande qui est en liaison de commande avec des vannes de contrôle de la pression de freinage associées aux roues respectives. L'invention repose sur le fait que les cycles de régulation exercés par l'unité de commande du système ABS sur les vannes de contrôle de freinage individuelles sont également ressentis sur la pédale de frein elle-même sous forme de mouvements de flottement. Dans le procédé selon l'invention, la fréquence d'actionnement d'au moins une vanne de contrôle associée à une roue est mesurée, lorsque la réponse du système ABS est perçue sur la pédale de frein elle-même, sous forme de variations de la course de la pédale en fonction de la pression de freinage. Le dispositif de contrôle conforme à l'invention présente, à cet effet, un capteur destiné à détecter les déplacements de la pédale, lors de la réponse du système de régulation, ce capteur étant relié à un dispositif d'évaluation par l'intermédiaire de conducteurs électriques ou d'une transmission sans fil de données.
PCT/EP1995/002537 1994-07-12 1995-06-30 Procede et dispositif de controle d'un systeme antiblocage pour freins de vehicules actionnes par un fluide sous pression WO1996001985A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19944424094 DE4424094C1 (de) 1994-07-12 1994-07-12 Verfahren und Vorrichtung zur Überprüfung eines Antiblockiersystems in einem Kraftfahrzeug
DEP4424094.5 1994-07-12

Publications (1)

Publication Number Publication Date
WO1996001985A1 true WO1996001985A1 (fr) 1996-01-25

Family

ID=6522647

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1995/002537 WO1996001985A1 (fr) 1994-07-12 1995-06-30 Procede et dispositif de controle d'un systeme antiblocage pour freins de vehicules actionnes par un fluide sous pression

Country Status (2)

Country Link
DE (1) DE4424094C1 (fr)
WO (1) WO1996001985A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104614113A (zh) * 2014-12-25 2015-05-13 钟云亮 一种制动操纵力计
CN109383485A (zh) * 2018-10-26 2019-02-26 齐齐哈尔四达铁路设备有限责任公司 集控闸瓦制动单车试风装置

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10015714A1 (de) 2000-03-29 2001-10-04 Bayerische Motoren Werke Ag Elektromechanische Fahrzeug-Bremsanlage
DE102005025066A1 (de) * 2004-08-28 2006-12-07 Dürr Somac GmbH Vorrichtung und Verfahren zur Erfassung von Kraft und/oder Weg und/oder Winkel an einem Pedalwerk
DE102004041733B4 (de) * 2004-08-28 2006-07-06 Dürr Somac GmbH Vorrichtung und Verfahren zur Erfassung von Kraft und Weg an einem Pedalwerk
DE102005024335A1 (de) * 2005-05-27 2007-04-05 Man Nutzfahrzeuge Ag Verfahren und Vorrichtung zur Durchführung von Bremsenprüfungen bei Kraftfahrzeugen mit Druckluftbremsanlage
DE102006028118B4 (de) * 2006-06-15 2016-10-13 Volkswagen Ag Bremsanlage in einem Kraftfahrzeug sowie ein dafür geeigneter Sensor
DE102010021577A1 (de) 2010-05-24 2011-11-24 Dürr Somac GmbH Verfahren und Vorrichtung zur Prüfung von Bremssystemen von Kraftfahrzeugen
DE102014008039A1 (de) 2014-05-28 2015-12-03 Dürr Somac GmbH Verfahren zur Prüfung von Bremssystemen von Kraftfahrzeugen

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2250728B1 (de) * 1972-10-16 1974-03-07 Carl Schenck Maschinenfabrik Gmbh, 6100 Darmstadt Pedalkraftmesser
US4050299A (en) * 1975-03-06 1977-09-27 Maxwell Lloyd R Brake testing method
JPH06113131A (ja) * 1992-09-28 1994-04-22 Canon Inc 画像処理装置
JPH0735649A (ja) * 1993-07-16 1995-02-07 Nissan Motor Co Ltd アンチロックブレーキシステムの性能評価方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2308694A1 (de) * 1973-02-22 1974-09-05 Bosch Gmbh Robert Einrichtung zur ueberpruefung von antiblockierregelsystemen fuer druckmittelbetaetigte fahrzeugbremsen
DE2841211C2 (de) * 1978-09-22 1986-12-11 Robert Bosch Gmbh, 7000 Stuttgart Prüfgerät für ein Antiblockiersystem und Komponenten davon
DE3427358A1 (de) * 1984-07-25 1986-02-06 Robert Bosch Gmbh, 7000 Stuttgart Verfahren zur rueckmeldung von stoerungen in bremsanlagen und nach diesem verfahren arbeitende bremsanlage
DE3731603C2 (de) * 1986-11-06 2001-11-22 Continental Teves Ag & Co Ohg Blockiergeschützte Fahrzeugbremsanlage
DE4028561A1 (de) * 1990-09-08 1992-03-12 Iveco Magirus Verfahren und vorrichtung zur statischen pruefung der einzelnen komponenten eines antiblockierschutz- und/oder antriebsschlupfregelungssystems in einem kraftfahrzeug

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2250728B1 (de) * 1972-10-16 1974-03-07 Carl Schenck Maschinenfabrik Gmbh, 6100 Darmstadt Pedalkraftmesser
US4050299A (en) * 1975-03-06 1977-09-27 Maxwell Lloyd R Brake testing method
JPH06113131A (ja) * 1992-09-28 1994-04-22 Canon Inc 画像処理装置
JPH0735649A (ja) * 1993-07-16 1995-02-07 Nissan Motor Co Ltd アンチロックブレーキシステムの性能評価方法

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 160 (P - 465)<2216> 7 June 1986 (1986-06-07) *
PATENT ABSTRACTS OF JAPAN vol. 95, no. 002 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104614113A (zh) * 2014-12-25 2015-05-13 钟云亮 一种制动操纵力计
CN109383485A (zh) * 2018-10-26 2019-02-26 齐齐哈尔四达铁路设备有限责任公司 集控闸瓦制动单车试风装置

Also Published As

Publication number Publication date
DE4424094C1 (de) 1995-11-23

Similar Documents

Publication Publication Date Title
DE3644139C2 (fr)
DE4429311C2 (de) Prüfeinrichtung für Fahrzeuge mit magnetfeldsensitivem Raddrehzahlsensor
EP0869875B1 (fr) Dispositif pour surveiller la pression des pneus
DE2756192C2 (de) Schaltungsanordnung zum Verhindern des Durchdrehens von zwei mit einem Achsausgleichgetriebe verbundenen Rädern eines Kraftfahrzeugs
EP3353024B1 (fr) Procédé d&#39;évaluation d&#39;une répartition de charge sur essieu dans le cas d&#39;un train routier
EP3359430B1 (fr) Dispositif et procédé de commande anti-glissement adaptative
DE3937966A1 (de) Verfahren und vorrichtung zur bestimmung der kraftschlussverhaeltnisse zwischen fahrzeugreifen und fahrbahn
WO1996001985A1 (fr) Procede et dispositif de controle d&#39;un systeme antiblocage pour freins de vehicules actionnes par un fluide sous pression
DE4016668A1 (de) Antiblockiersteuersystem fuer kraftfahrzeuge
DE69934599T2 (de) Verfahren und vorrichtung zur bremsenüberwachung in antiblockier- oder elektronischen bremssystemen
DE10360728A1 (de) Verfahren und Vorrichtung zur Bestimmung eines Fahrzeugzustandes
DE19601529A1 (de) Verfahren zur Verbesserung des Regelverhaltens eines ABS in einer Off-Road-Fahrsituation
DE10164108A1 (de) Verfahren für die Funktionsprüfung eines Querbeschleunigungssensors
DE69816166T2 (de) Korrekturverfahren vom Ausgangsunterschied von Reifen für eine Vorrichtung zur Reifendruckabfallserkennung
EP1778529B1 (fr) Controle de performance de freins
DE19537791C2 (de) Verfahren und Vorrichtung zur Ermittlung der Fahrgeschwindigkeit eines Kraftfahrzeuges
DE60214947T2 (de) Verfahren zur Steuerung einer Bremsanlage
DE19530735A1 (de) Verfahren und Vorrichtung zur Steuerung der Bremsanlage eines Fahrzeugs
DE10026685A1 (de) Bremsanlage für mit einer ABS-Anlage bzw. einer Gleitschutzanlage ausgerüstete Fahrzeuge
DE10251381A1 (de) Verfahren zur Ermittlung des Kraftschlussbeiwertes zwischen Reifen und Fahrbahn
WO2001092075A1 (fr) Procede et dispositif destines a determiner la pression de reponse de freins automobiles
DE9410891U1 (de) Vorrichtung zur Überprüfung eines Antiblockierregelsystems bei druckmittelbetätigten Fahrzeugbremsen
DE19726072A1 (de) Verfahren zum Steuern von Bremsventilen
EP1695884B1 (fr) Procédé et dispositif pour la détermination de la masse d&#39;un véhicule automobile pendant un changement d&#39;état
WO2004110835A1 (fr) Frein de stationnement a actionnement electromecanique pour des vehicules automobiles

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CA CN CZ JP PL RU US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase