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WO2012034743A1 - Banc d'essai et procédé de contrôle d'un système de freinage d'un véhicule à moteur - Google Patents

Banc d'essai et procédé de contrôle d'un système de freinage d'un véhicule à moteur Download PDF

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Publication number
WO2012034743A1
WO2012034743A1 PCT/EP2011/062456 EP2011062456W WO2012034743A1 WO 2012034743 A1 WO2012034743 A1 WO 2012034743A1 EP 2011062456 W EP2011062456 W EP 2011062456W WO 2012034743 A1 WO2012034743 A1 WO 2012034743A1
Authority
WO
WIPO (PCT)
Prior art keywords
control unit
brake
motor vehicle
braking force
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.)
Ceased
Application number
PCT/EP2011/062456
Other languages
German (de)
English (en)
Inventor
Silke Spitzer
Karl Egle
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 WO2012034743A1 publication Critical patent/WO2012034743A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • G01L5/28—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for testing brakes
    • G01L5/282—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for testing brakes the vehicle wheels cooperating with rotatable rolls
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M17/00—Testing of vehicles
    • G01M17/007—Wheeled or endless-tracked vehicles
    • G01M17/0072—Wheeled or endless-tracked vehicles the wheels of the vehicle co-operating with rotatable rolls
    • G01M17/0074—Details, e.g. roller construction, vehicle restraining devices

Definitions

  • the invention relates to a test stand and a method for testing a brake system of a motor vehicle.
  • the braking forces are usually axle wise, i. measured simultaneously on the left and right sides. In such simultaneous measurement, evaluation of the braking force difference is easily possible by directly comparing the braking force values measured for the left and right sides.
  • pedal force tester measures the operating force (pedal force) applied to the brake pedal during the measurement. Together with this actuating force, the braking forces of the currently measured side are recorded. When the braking forces for the left and right sides of an axle have been measured in this way, the operating force measured by the pedal force tester is the reference value for calculating the difference of the braking forces.
  • the brake force distribution between the front axle and the rear axle of the vehicle can be determined.
  • the use of a pedal force tester is cumbersome and time-consuming for the user. For example, before the measurement, he first has to attach it to his foot or the brake pedal and remove it again after the measurement has been completed.
  • DE 33 26 496 discloses a control device for performing the brake test at
  • Motor vehicle trailers which are provided with compressed air brakes and have electrical and pneumatic connecting lines with coupling heads for connection with train carriage-side coupling pieces.
  • the control unit is provided with coupling pieces associated with the coupling heads, has a brake actuating element for the brake actuation and is provided at least with a pneumatic supply connection and blocking valves lying in the transition from the supply connection to the coupling pieces.
  • An object of the invention is to enable a comfortable, simple and reliable differential evaluation of braking forces measured in Einzelradier.
  • An inventive brake tester is for testing a brake system of a
  • Motor vehicle suitable which has a motor vehicle control unit, which is able to measure by means of a pressure sensor, the system pressure in the brake system.
  • the brake tester has at least one brake force measuring device which is suitable for measuring a braking force acting on one of the wheels of the motor vehicle, and a brake tester control unit which can be connected to the motor vehicle control unit such that the value of the system pressure in the brake system of the Motor vehicle is transferable from the motor vehicle control unit to the brake tester control unit.
  • An inventive method for testing the brake system of a motor vehicle with a motor vehicle control unit which is able to measure the system pressure in the brake system with the aid of a pressure sensor, comprises the steps: establishing a connection for data transmission between the motor vehicle control unit and a brake test stand control device; Actuating the brake of the vehicle; Transmitting the value of the system pressure in the brake system of the vehicle from the motor vehicle control unit to the brake tester control unit; Measuring the braking force of at least one wheel.
  • the measurements can be done so easily and quickly. In particular, can be dispensed with a complicated, uncomfortable and time-consuming on and dismantling a pedal force sensor.
  • the method is more accurate and reliable than conventional methods in which the force acting on the brake pedal force is measured and closed from this to the system pressure prevailing in the brake system.
  • the brake tester has at least two brake force measuring devices. With two brake force measuring devices, the braking forces acting on two wheels can be measured simultaneously or successively, without it being necessary to move the vehicle between the measurements and / or to change a brake force measuring device from one wheel to another wheel. The measurements can be carried out very easily, conveniently and quickly.
  • the brake tester control unit can be connected to the motor vehicle control unit via at least one control unit diagnostic module.
  • ECU diagnostic modules are known and common to read data from vehicle control units for diagnostic and / or repair purposes and / or to program the vehicle control unit.
  • a brake tester control unit according to the invention can be realized in a particularly cost-effective manner.
  • the brake tester control unit has an analog or a digital interface, which is designed to connect the brake tester control unit to the motor vehicle control unit or to the control unit diagnosis module.
  • the pressure values in the brake system can be transmitted particularly reliably and with high accuracy from the motor vehicle control unit or from the control unit diagnosis module to the brake test stand control unit.
  • An analog interface can also be used to connect a conventional pedal force sensor, which usually outputs an analog signal.
  • a brake tester control unit with an analog interface can therefore also be used together with a conventional pedal force sensor and / or controllers which output analog brake pressure values.
  • the method additionally includes measuring the braking force of at least one other (second) wheel and comparing it with the braking force measured at the first wheel.
  • the braking forces acting on the first and second wheels can be compared with each other in a particularly simple and reliable manner and a difference of the braking force acting between the two wheels can be calculated.
  • the method comprises measuring the braking force of the first wheel and the braking force of the second wheel not simultaneously but successively in separate measuring operations and with respect to the system pressure prevailing during the respective measurement in the brake system of the vehicle to compare.
  • the two consecutively measured braking forces can be related to each other.
  • both measurements are carried out at the same system pressure in the brake system.
  • the figure shows an embodiment of a brake tester 2 according to the invention on which a vehicle to be tested 4 is arranged.
  • the vehicle 4 has a front axle 12 and a rear axle 14, at each of whose ends a wheel 8a, 8b, 8c, 8d is arranged.
  • a differential gear 16, 18 is arranged in each case, which compensates for speed differences between the left wheel 8a, 8d and the right wheel 8b, 8c of each axle 12, 14.
  • the front axle 12 and the rear axle 14 are interconnected by a propeller shaft 22 (four-wheel drive).
  • a further differential gear 20 is arranged, which speed differences between the wheels 8a, 8b of the front axle 12 and the wheels 8c, 8d of the rear axle
  • An inventive brake tester 2 is particularly well suited for testing the brake system of a vehicle 4 with four-wheel drive, as shown in the figure. But with a brake tester 2 according to the invention can also
  • Vehicles with two-wheel drive in which only the front axle 12 or only the rear axle 14 is driven, are checked.
  • the front axle 12, the rear axle 14 and the propeller shaft 22 are driven via a not shown gear by a motor, also not shown, as is known in the art.
  • each of the wheels 8a, 8b, 8c, 8d is in each case a brake disc 10, 10b, 10c, 10d with associated brake shoes 1 1 a, 1 1 b, 1 1 c, 1 1 d arranged.
  • the brake discs 10, 10b, 10c, 10d are so connected to the wheels 8a, 8b, 8c, 8d that the wheels 8a, 8b, 8c, 8d by pressing the brake shoes 1 1 a, 1 1 b, 1 1 c, 1 1 d to the associated brake disc 10a, 10b, 10c, 10d are braked.
  • the brake pressure generator 26 is for example a brake cylinder and / or a brake booster and is controlled by a brake pedal.
  • the brake circuit can be filled with a brake fluid (hydraulic brake) or air (compressed-air brake).
  • motor vehicles usually have two independent brake circuits. Since this is not important for the operation of a brake tester 2 according to the invention, only a single brake circuit is shown in the embodiment shown in the figure for reasons of clarity.
  • a brake pressure sensor 28 Arranged on the brake circuit is a brake pressure sensor 28, which is able to measure the pressure prevailing in the brake system (system pressure) and to pass on the measured value via an electrical data line 30 to a motor vehicle control unit 6.
  • the brake pressure sensor 28 is preferably arranged in the vicinity of the brake pressure generator 26, before the brake circuit divides into the brake lines 24 leading to the different wheels 8a, 8b, 8c, 8d.
  • the motor vehicle control unit 6 has a data connector 32, which is designed to control the motor vehicle control unit 6 via a first data cable
  • the control unit diagnostic module 36 is designed to read out and evaluate data via the first data cable 34 and the data plug connector 32 from the motor vehicle control unit 6.
  • ECU diagnostic modules 36 are known in the automotive industry for use in diagnostics, repair, and maintenance. However, it has not hitherto been known to couple such a control module diagnostic module 36 to a brake tester control unit 40 to read the pressure in the brake system of the motor vehicle 4 during a brake test.
  • the brake tester 2 shown in the figure has two roller dynamometers 50, 52 arranged side by side, each with two rollers 50a, 50b, 52a, 52b arranged parallel to one another.
  • the rollers 50a, 50b, 52a, 52b are arranged such that the two wheels 8a, 8b; 8c, 8d of an axle 12, 14 of the motor vehicle 4 to be tested can be arranged on one of the roller test stands 50, 52 at the same time.
  • the wheels 8a, 8b of the front axle 12 of the motor vehicle 4 to be tested are arranged on one of the roller test stands 50, 52.
  • the roller test stands 50, 52 are designed such that they can drive the respective wheels 8a, 8b arranged on them and measure a braking force acting on the respective wheel 8a, 8b.
  • the two roller test stands 50, 52 via data and control lines 46, 48 with a brake tester
  • the brake tester control unit 40 has at least one display device 42, which is designed to indicate the operating state of the brake tester 2 and the measured values determined by the brake tester 2.
  • the brake tester control unit 40 has at least one input device 44, which is embodied for example as a keyboard in order to be able to enter commands into the brake tester control unit 40.
  • the exemplary embodiment of a brake tester 2 according to the invention shown in FIG has, in addition to the fixed to the brake tester control unit 40 input device 44 on a remote control 54, which allows a person testing the brake system of the motor vehicle 4, the brake tester control unit 40 from the interior of the To control vehicle 4. This allows a particularly convenient operation of the brake tester
  • Control unit 40 and in particular also an operation of the brake tester control unit 40 with simultaneous actuation of the brake, in particular of the brake pedal, the vehicle 4.
  • the remote control 54 may be formed for example as infrared or radio remote control 54.
  • the control unit diagnostic module 36 is connected to the brake tester control unit 40 via a second data cable 38, so that via the second data cable 38, the control unit diagnosis module 36 and the first data Cable 34 of the system measured by the brake pressure sensor 28 in the brake line 24 system pressure in the brake system from the motor vehicle control unit 6 and can be transmitted to the brake tester control unit 40.
  • the brake tester control unit 40 is thus aware of the system pressure in the brake system of the motor vehicle 4, without having to install an additional sensor in the brake system or on the brake pedal.
  • Control unit 6 has been read out, are stored.
  • the braking force values measured in the various measuring passes can be related to one another and, in particular, compared with each other.
  • a wheel-by-axle test of the brake system is made possible, as is particularly advantageous in vehicles 4 with four-wheel drive, in order to reliably avoid impermissible force superpositions between the individual wheels 8a, 8b, 8c, 8d, which would falsify the measurement results.
  • the system pressure prevailing in the brake system which has been measured by the brake pressure sensor 28 and passed on to the brake tester control unit 40 via the motor vehicle control unit 6 and the control unit diagnosis module 36, can be displayed on the display device 42 of the brake tester control unit 40 to ask an operator seated in the vehicle 4 to set a predetermined pressure in the brake system of the motor vehicle 4 by suitable actuation of the brake pedal.
  • the motor vehicle 4 after the braking force measurement has been carried out on the front wheels 8a, 8b, is moved such that instead of the front wheels 8a, 8b, the rear wheels 8c, 8d are positioned on the chassis dynamometers 50, 52, also on the Rear wheels 8c, 8d of the motor vehicle 4 measured braking forces and compared with each other and / or with the forces acting on the front wheels 8a, 8b braking forces, taking into account the prevailing during the individual measurements system pressure.
  • the invention enables a comfortable and simple measurement of the difference in braking forces in motor vehicles 4 with two-wheel or four-wheel drive, without that it is necessary to install a pedal force tester to detect the actuation force acting on the brake pedal during the measurement.
  • the motor vehicle control unit 6 already installed in the motor vehicle 4 and a conventional control unit diagnosis module 36 are used, the invention can be implemented simply and inexpensively.
  • control unit diagnostic module 36 is integrated into the brake tester control unit 40.
  • the operation of the brake tester control unit 40 is thus possible independently of an external control unit diagnostic module 36.
  • the data transmission from the motor vehicle control unit 6 to the control unit diagnosis module 36 or from the control unit diagnosis module 36 to the brake test stand control unit 40 can be digital, z. B. as a serial protocol, or analog, z. B. as a current or voltage signal, as it is usually issued by a conventional pedal force sensor done.
  • Digital data transmission is particularly accurate and reliable.
  • An analog signal which in particular supplies values which correspond to those of a known pedal force sensor, makes it possible for a conventional brake tester control unit 40, which is intended for use in a pedal force sensor, to be provided according to the invention with a pressure signal which is supplied by the motor vehicle control unit 6, to supply. This allows a particularly simple and inexpensive upgrade of conventional brake tester control units 40.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Regulating Braking Force (AREA)

Abstract

Banc d'essai de freinage (2) pour contrôler le système de freinage d'un véhicule à moteur (4), comportant un appareil de commande de véhicule (6) qui est apte à mesurer la pression régnant dans le système de freinage du véhicule à moteur (4) au moyen d'un capteur de pression (28). Le banc d'essai comprend au moins un dispositif de mesure de puissance de freinage (50,52), qui est apte à mesurer la force de freinage s'exerçant sur une des roues (8a, 8b, 8c, 8d) du véhicule à moteur (4), ainsi qu'un appareil de commande de banc d'essai de freinage (40). L'appareil de commande de banc d'essai de freinage (40) peut être relié à l'appareil de commande de véhicule (6) de façon que la valeur de la pression dans le système de freinage du véhicule à moteur (4) puisse être transmise par l'appareil de commande de véhicule (6) à l'appareil de commande de banc d'essai de freinage (40).
PCT/EP2011/062456 2010-09-13 2011-07-20 Banc d'essai et procédé de contrôle d'un système de freinage d'un véhicule à moteur Ceased WO2012034743A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010040644.9 2010-09-13
DE201010040644 DE102010040644A1 (de) 2010-09-13 2010-09-13 Prüfstand und Verfahren zum Prüfen einer Bremsanlage eines Kraftfahrzeugs

Publications (1)

Publication Number Publication Date
WO2012034743A1 true WO2012034743A1 (fr) 2012-03-22

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Application Number Title Priority Date Filing Date
PCT/EP2011/062456 Ceased WO2012034743A1 (fr) 2010-09-13 2011-07-20 Banc d'essai et procédé de contrôle d'un système de freinage d'un véhicule à moteur

Country Status (2)

Country Link
DE (1) DE102010040644A1 (fr)
WO (1) WO2012034743A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016009458A1 (de) 2016-08-03 2017-04-06 Daimler Ag Verfahren zum Prüfen einer Bremsanlage eines Fahrzeugs
CN106644513A (zh) * 2016-12-27 2017-05-10 中国标准化研究院 一种汽车驾驶室刹车系统工效学测试装置
CN107796636A (zh) * 2017-10-26 2018-03-13 安徽农业大学 一种车辆制动舒适性测试系统及方法
CN108931384A (zh) * 2018-08-01 2018-12-04 北京长城华冠汽车技术开发有限公司 一种用于模拟整车状态测量制动系统性能的工装

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102866020A (zh) * 2012-09-28 2013-01-09 中国人民解放军军事交通学院 基于正反转滚筒的制动力测试试验台
ITPI20130104A1 (it) * 2013-12-23 2015-06-24 Snap Nt S R L Struttura perfezionata di banco prova freni multipiastre
CN110108502B (zh) * 2019-05-07 2024-04-19 深圳市检验检疫科学研究院 用于电动独轮平衡车环境可靠性测试的固定夹具和方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0103116A1 (fr) * 1982-07-27 1984-03-21 Közlekedéstudományi Intézet Méthode de contrôle, à réglage programmé, des dispositifs de freins pour automobiles
DE3326496A1 (de) 1983-07-22 1988-07-28 Alb Maschinen Aus zusammenklappbaren funktionseinheiten bestehende vorrichtung zur betonbereitung
DE3828726A1 (de) * 1987-09-04 1989-03-23 Fuji Heavy Ind Ltd Verfahren zum ueberpruefen der funktion eines antiblockiersystems in einem kraftfahrzeug
EP0945321A1 (fr) * 1998-03-25 1999-09-29 Assembly Technology & Test Limited Un appareil de commande pour spécialement mais pas exclusivement commander la pression de freinage dans un système de freinage d'un véhicule, et un procédé de fonctionnement
JP2003014589A (ja) * 2001-06-29 2003-01-15 Nissan Motor Co Ltd 車両の旋回挙動制御機能検査装置および旋回挙動制御機能検査方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0103116A1 (fr) * 1982-07-27 1984-03-21 Közlekedéstudományi Intézet Méthode de contrôle, à réglage programmé, des dispositifs de freins pour automobiles
DE3326496A1 (de) 1983-07-22 1988-07-28 Alb Maschinen Aus zusammenklappbaren funktionseinheiten bestehende vorrichtung zur betonbereitung
DE3828726A1 (de) * 1987-09-04 1989-03-23 Fuji Heavy Ind Ltd Verfahren zum ueberpruefen der funktion eines antiblockiersystems in einem kraftfahrzeug
EP0945321A1 (fr) * 1998-03-25 1999-09-29 Assembly Technology & Test Limited Un appareil de commande pour spécialement mais pas exclusivement commander la pression de freinage dans un système de freinage d'un véhicule, et un procédé de fonctionnement
JP2003014589A (ja) * 2001-06-29 2003-01-15 Nissan Motor Co Ltd 車両の旋回挙動制御機能検査装置および旋回挙動制御機能検査方法

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016009458A1 (de) 2016-08-03 2017-04-06 Daimler Ag Verfahren zum Prüfen einer Bremsanlage eines Fahrzeugs
CN106644513A (zh) * 2016-12-27 2017-05-10 中国标准化研究院 一种汽车驾驶室刹车系统工效学测试装置
CN106644513B (zh) * 2016-12-27 2019-07-05 中国标准化研究院 一种汽车驾驶室刹车系统工效学测试装置
CN107796636A (zh) * 2017-10-26 2018-03-13 安徽农业大学 一种车辆制动舒适性测试系统及方法
CN108931384A (zh) * 2018-08-01 2018-12-04 北京长城华冠汽车技术开发有限公司 一种用于模拟整车状态测量制动系统性能的工装

Also Published As

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