GB2202016A - Brake-monitoring device - Google Patents

Brake-monitoring device Download PDF

Info

Publication number
GB2202016A
GB2202016A GB08805438A GB8805438A GB2202016A GB 2202016 A GB2202016 A GB 2202016A GB 08805438 A GB08805438 A GB 08805438A GB 8805438 A GB8805438 A GB 8805438A GB 2202016 A GB2202016 A GB 2202016A
Authority
GB
United Kingdom
Prior art keywords
brake
memory unit
microprocessors
wear
wheel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB08805438A
Other versions
GB2202016B (en
GB8805438D0 (en
Inventor
Helmut Fennel
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.)
Continental Teves AG and Co oHG
Original Assignee
Alfred Teves 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 Alfred Teves GmbH filed Critical Alfred Teves GmbH
Publication of GB8805438D0 publication Critical patent/GB8805438D0/en
Publication of GB2202016A publication Critical patent/GB2202016A/en
Application granted granted Critical
Publication of GB2202016B publication Critical patent/GB2202016B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60TVEHICLE 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
    • B60T17/00Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/18Safety devices; Monitoring
    • B60T17/22Devices for monitoring or checking brake systems; Signal devices
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D66/00Arrangements for monitoring working conditions, e.g. wear, temperature
    • F16D66/02Apparatus for indicating wear
    • F16D66/021Apparatus for indicating wear using electrical detection or indication means
    • F16D66/022Apparatus for indicating wear using electrical detection or indication means indicating that a lining is worn to minimum allowable thickness
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D66/00Arrangements for monitoring working conditions, e.g. wear, temperature
    • F16D66/02Apparatus for indicating wear
    • F16D66/021Apparatus for indicating wear using electrical detection or indication means
    • F16D66/026Apparatus for indicating wear using electrical detection or indication means indicating different degrees of lining wear
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D66/00Arrangements for monitoring working conditions, e.g. wear, temperature
    • F16D2066/006Arrangements for monitoring working conditions, e.g. wear, temperature without direct measurement of the quantity monitored, e.g. wear or temperature calculated form force and duration of braking

Landscapes

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

Abstract

A brake monitoring device for a brake system of an automotive vehicle equipped with an electronic anti-lock system (25) comprises two microprocessors (19,20) which have input signals formed by a clock signal, wheel speed signals as well as a brake-actuating signal. A programmable and erasable memory unit (18) is connected to at least one of the microprocessors (19,20) from which it receives the most important data indicative of the degree of wear and the brake system and thus memorises the history of the brake system since the last erasure. At least one of the microprocessors determines from the contents of the memory unit (18) the degree of wear of the individual components of the brake system and issues an alarm signal when a predetermined degree of wear is reached. <IMAGE>

Description

BRAKE-MONITORING DEVICE The present invention relates to a brakemonitoring device in a brake system of automotive vehicles equipped with an electronic anti-lock system, wherein, as input signals, each microprocessor of a pair of microprocessors is supplied with a clock signal by a clock generator, is supplied with wheel speed signals by wheel speed sensors and with a brake-actuation signal by a brake light switch, and wherein both microprocessors supply as output signals, derived from these input signals, actuating signals for solenoid valves in the wheel brake circuits, which valves at the onset of wheel slip reduce the braking pressure in the wheel brake cylinders to counteract wheel slip.
For safety reasons, two microprocessors are provided and the arrangement may be such that one of them can be redundent. In this case the sensor signals are supplied in parallel to the two microprocessors and are processed in them in the same manner in accordance with the same programme.
The output signals of both microprocessors are checked for coincidence. If there is a discrepancy, due for example to a defect in any one of the two microprocessors, the control may be de-activated by a pertinent safety monitoring circuit. A suitable monitoring device is known from German published patent application 32 34 637.
Conventional brake warning devices function inadequately in the event of worn brake pads, because they generally are based upon a direct measurement of brake pad wear by electric contacts which may become corroded or damaged particularly easily in the heavy-duty service of brakes. It has not been possible so far to generally monitor all important component parts of a brake system.
The present invention seeks to provide a brakemonitoring device of the species initially referred to in which the operating condition of at least the essential component parts of the brake system is constantly checked so that, upon the occurrence of a wear condition exceeding a predetermined value, an alarm signal is provided in sufficient time to permit the driver to report to a workshop for brake inspection.
According to the invention there is provided a brake-monitoring device for a brake system of an automotive vehicle equipped with an electronic anti-lock system, wherein, as input signals, each microprocessor of a pair of microprocessors, is supplied with a clock signal by a clock generator, is supplied with wheel speed signals by wheel speed sensors and with a brake-actuation signal by a brake light switch, and wherein both microprocessors supply as output signals, derived from these input signals, actuating signals for solenoid valves in the wheel brake circuits, which valves at the onset of wheel slip reduce the braking pressure in the wheel brake cylinders to counteract wheel slip, characterised in that a programmable and erasable memory unit is connected to at Least one of the microprocessors and obtains therefrom at least that data which is most important for determining the degree of wear of the brake system, which data is calculated from the input signals, and memorises the history of the brake system since the last erasure, in that at least one of the microprocessors is connected with the memory unit such that the degree of the brake system's wear is determined by the data stored in the memory unit, in that a warning device is connected to the microprocessor evaluating the contents of the memory unit, to which warning device an alarm signal is issued upon attainment of a predetermined degree of wear by the microprocessor evaluating the contents of the memory unit.
The present invention is based on the knowledge that in anti-lock brake systems working with one microprocessor all data necessary for determining the degree of wear of the individual component parts of the brake system is already available, so that all that is required is to utilise this existing information in a suitable manner. This is enabled by the provision of an additional programmable and erasable memory unit in which the complete history since the last brake service is stored. From this data, the microprocessor evaluating the contents of the memory unit determines the degree of wear of the individual brake components so that an alarm signal can be issued when a predefined degree of wear is reached. This signal can be supplied e.g. to a service interval display unit on the instrument panel.As soon as the corresponding lamp lights up, the driver will know that now he must have the brakes inspected. The brake pads will then be checked, the anti-lock apparatus will be adjusted and/or the brake fluid will be replaced in the workshop. Subsequent to this inspection, workshop personnel will erase the history of the brake system stored in the memory unit so that, starting from this point of time, a new history of the individual brake components can be stored in the memory unit.
In order to obtain a general account as complete as possibLe of the degree of wear of the individual component parts of the brake system, it is provided according to a refinement of the invention that the microprocessors or one of the microprocessors forms from the input signals one or more of the following input parameters for the memory unit: frequency of brake application, initial velocity and final velocity on each braking action, duration of each braking action, deceleration achieved during each braking action, number of normal braking actions, number of braking actions involving slip.
Furthermore, it is expedient if the microprocessor(s) evaluating the contents of the memory unit determines from the memory contents of the memory unit one or more of the following output parameters: degree of wear of the brake pads, deterioration of the brake fluid's condition, wear of the component parts of the anti-lock system.
In this case there may be provided a threshold unit at the output of the microprocessor to evaluate the contents of the memory unit, the thresholds of which threshold unit being conformed to the predetermined degrees of wear of the individual components of the brake system.
A practical realisation of this invention arranges for the memory unit to be an EEPROM.
In order that the invention and its various other preferred features may be understood more easily, an embodiment thereof will now be described, by way of example only with reference to the drawing, the single figure of which is a schematic block diagram of a brake-monitoring device constructed in accordance with the invention.
According to the drawing, the wheels 23 of an automotive vehicle, only one of which is illustrated for the sake of clarity, are each equipped with a sensor wheel 24 co-rotating with the wheel and generating upon rotation of the wheel, in a wheel speed sensor 14 located closely thereto, an electric signal representative of the rotational speed of the wheel 23. One inductive wheel speed sensor 14 is arranged at each one of the generally four vehicle wheels.
Each wheel 23 comprises a hydraulic brake including a wheel brake cylinder 17 which is indicated only schematically in the drawing and which acts upon a non-illustrated brake disc. The wheel brake cylinders 17 are connected to a hydraulic wheel brake circuit 16 which - via a solenoid valve assembly 15 which is illustrated only schematically and belongs to an anti-lock system 25 - communicates with a hydraulic brake-actuating device 26 which e.g. is composed of a hydraulic pump 27, a return reservoir 28, a master cylinder 36 and a brake pedal 29. Upon depression of the brake pedal 29, hydraulic pressure is supplied via the solenoid valve assembly 15 and the wheel brake circuit 16 to the wheel brake cylinders 17, which pressure causes braking the vehicle wheels 23 in dependence upon the force exerted on the brake pedal 29.
The four wheel sensors sens9rs 14 are sQnnested to the anti-lock system 25. Via a pulse-forming circuit 30, the wheel speed signals are delivered to two parallel connected redundantly processing microprocessors 19,20 which form a microprocessor 11 which are each also supplied by a brake light switch 13 with a further input signal, via another pulse-forming, which switch signifies to the microprocessors 19,20 when the brake light switch 13 is closed. In this way, the microprocessors 19,20 assess how often the brake pedal is depressed.
Additionally, the brake light switch 13 actuates the stop lights 32. The microprocessors 19,20 are supplied with a stabilised direct-current voltage via a voltage controller 37.
Connected to the microprocessors 19,20 is a clock generator 12 which signals to both microprocessors 19,20 the elapsed time since the last brake inspection and also supplies a clock signal required for the normal braking operation.
In a known way, the microprocessors 19,20 form from the input signals suitable output signals for the actuation of the solenoid valve assembly 15 which are routed via an adapting circuit 33 to an amplifier 34 which acts in a directly controlling manner upon the solenoid valve assembly 15. In the case of commencement of wheel slip at one of the wheels 23, despite the brake pedal 29 being depressed, the solenoid valve assembly 15 provided for the corresponding wheel brake cylinder 17 cause the braking pressure to be decreased so far that wheel slip no longer occurs. In a known way, each solenoid valve assembly comprises in closing valves establishing a connection to the pump 27 as well as opening valves establishing a connection to the return reservoir 28.A function-monitoring stage 38 delivers a warning signal to an alarm lamp 39 when the anti-lock control is switched off e.g. due to failure of one of the two microprocessors 19,20.
A memory unit 18 in the form of an EEPROM is connected to the microprocessors 19,20 in which the entire history of the brake system since the last brake inspection is stored. This data includes the frequency of brake light switching, the initial velocity and final velocity on each braking action, the duration of each braking action, the attained deceleration during each braking action as well as the duration of use. Additionally, there is stored in the memory unit 18 information about whether a normal braking action or a braking action with brake slip control was performed, which latter required the operation of the components of the anti-lock system 25.
The microprocessor 20 evaluates the contents of the memory unit 18 by constantly interrogating the contents of the memory unit 18 and by ascertaining from the data stored in the memory unit 18 the degree of wear of the brake system. This arrangement allows recognition of the wear condition of all individual components of the brake system, such as the degree of wear of the brake pads, the consumption of brake fluid and its deterioration as well as the wear of the mechanic and the hydraulic components of the anti-lock system. These wear phenomena are computed from the input signals available.
A warning device, in the form of a service tell-tale lamp 21, is connected to the microprocessor 20 via a threshold unit 22 and another adapting circuit 35. As soon as any one of the brake components has reached a specific degree of wear or consumption, as defined by predetermined threshold levels set in the unit 22, the service tell-tale lamp 21 will light up and thus signal to the driver that he must take the vehicle for inspection.
Although in the embodiment illustrated, the programmable memory unit 18 is connected to both of the microprocessors it may be connected to only one of the microprocessors.
Although in the embodiment illustrated, only one of the microprocessors are connected to the solenoid valve and the function monitoring stage 38 and tell-tale lamp 21 both microprocessors could be so connected to provide a fail safe system where one microprocessor can be redundent.

Claims (7)

CLAIMS:
1. A brake-monitoring device for a brake system of an automotive vehicle equipped with an electronic anti-lock system, wherein, as input signals, each microprocessor of a pair of microprocessors, is supplied with a clock signal by a clock generator, is supplied with wheel speed signals by wheel speed sensors and with a brakeactuation signal by a brake light switch, and wherein both microprocessors supply as output signals, derived from these input signals, actuating signals for solenoid valves in the wheel brake circuits, which valves at the onset of wheel slip reduce the braking pressure in the wheel brake cylinders to counteract wheel slip, characterised in that a programmable and erasable memory unit (18) is connected to at least one of the microprocessors (19,20) and obtains therefrom at least that data which is most important for determining the degree of wear of the brake system, which data is calculated from the input signals, and memorises the history of the brake system since the last erasure, in that at least one of the microprocessors (19,20) is connected with the memory unit (18) such that the degree of the brake system's wear is determined by the data stored in the memory unit (18), in that a warning device (21) is connected to the microprocessor (20) evaluating the contents of the memory unit (18) , to which warning device an alarm signal is issued upon attainment of a predetermined degree of wear by the microprocessor (20) evaluating the contents of the memory unit (18).
2. A brake-monitoring device as claimed in claim 1, characterised in that the programmable memory unit (18) is connected to both of the microprocessors (19,20) and only one of the microprocessors (20) is connected with the warning device (21).
3. A device as claimed in claim 1 or 2,.
characterised in that the microprocessors (19,20) determine from the input signals one or more of the following input parameters for the memory unit (18):- frequency of brake application, initial velocity and final velocity on each braking action, duration of each braking action, deceleration achieved during each braking action, number of normal braking actions, number of braking actions involving wheel slip.
4. A device as claimed in any one of the preceding claims, characterised in that the microprocessor (20) evaluating the contents of the memory unit (18) determines from the content of the memory unit (18) one or more of the following output parameters: degree of wear of the brake pads, deterioration of the brake fluid's condition, wear of the component parts of the anti-lock system.
5. A device as claimed in any one of the preceding claims, characterised in that a threshold unit (22) is provided at the output of the microprocessor (20) which evaluates the contents of the memory unit (18), the thresholds of the threshold unit being conformed to predetermined degrees of wear or consumption of individual components of the brake system.
6. A device as claimed in any one of the preceding claims, characterised in that the memory unit (18) is an EEPROM.
7. A brake monitoring device substantially as described herein with reference to the drawing.
GB8805438A 1987-03-12 1988-03-08 Brake-monitoring device Expired - Lifetime GB2202016B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873707980 DE3707980C2 (en) 1987-03-12 1987-03-12 Brake monitoring device

Publications (3)

Publication Number Publication Date
GB8805438D0 GB8805438D0 (en) 1988-04-07
GB2202016A true GB2202016A (en) 1988-09-14
GB2202016B GB2202016B (en) 1991-03-27

Family

ID=6322877

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8805438A Expired - Lifetime GB2202016B (en) 1987-03-12 1988-03-08 Brake-monitoring device

Country Status (3)

Country Link
DE (1) DE3707980C2 (en)
FR (1) FR2612143B1 (en)
GB (1) GB2202016B (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993021458A1 (en) * 1992-04-13 1993-10-28 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Clearance detector for a pneumatically operated disc brake
FR2690720A1 (en) * 1992-04-30 1993-11-05 Daimler Benz Ag Method for adjusting the wear of brake linings in a motor vehicle braking system, actuated by a pressurized fluid.
US5372411A (en) * 1992-04-13 1994-12-13 Robert Bosch Gmbh Safety equipment for a motor vehicle
GB2279713A (en) * 1993-07-06 1995-01-11 Daimler Benz Ag Device for ABS-integrated brake pad wear indication in a motor vehicle
EP0637534A1 (en) * 1993-08-05 1995-02-08 Mercedes-Benz Ag Method for calculation a wear dependent brake force distribution
WO1998028172A1 (en) * 1996-12-20 1998-07-02 Robert Bosch Gmbh System for varying and/or evaluating a rotational speed signal
WO2000023305A1 (en) * 1998-10-19 2000-04-27 Alliedsignal Inc. Method and apparatus for monitoring brake operation in an anti-lock or electronic braking system
EP3023667A1 (en) * 2014-11-21 2016-05-25 ArvinMeritor Technology, LLC Brake pad wear monitoring system
RU2623505C2 (en) * 2012-10-03 2017-06-27 КОУНКРЭЙНС Глобал Корпорейшен Brakes operation monitoring

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3828931A1 (en) * 1988-08-26 1990-03-01 Teves Gmbh Alfred Method for monitoring the function of a brake system
DE3828932A1 (en) * 1988-08-26 1990-03-01 Teves Gmbh Alfred Method for monitoring the operation of a hydraulic, pneumatic, mechanical and/or electrical device
DE3925829A1 (en) * 1989-08-04 1991-02-07 Bosch Gmbh Robert Regulation and control device e.g. for anti-lock braking system - detects slow sensor deterioration by periodic comparison of actual and stored signal amplitudes
DE4020693A1 (en) * 1990-06-29 1992-02-20 Bosch Gmbh Robert Motor vehicle brake temp. monitoring system
DE4106704C5 (en) * 1991-03-02 2009-12-17 Wabco Gmbh Device and method for error detection and display
DE4316993C2 (en) * 1993-05-21 1995-08-24 Daimler Benz Ag Method and device for determining the state of a vehicle brake system
DE19717555A1 (en) * 1997-04-25 1998-10-29 Abb Daimler Benz Transp Process for monitoring the condition of brake pad wear in friction brakes for rail vehicles
DE10127480A1 (en) * 2000-06-16 2002-03-28 Continental Teves Ag & Co Ohg Method for determining or estimating the tightness or condition of brake pads using a determination of the braking period and intensity
EP1970274B1 (en) * 2000-08-04 2014-01-08 Meggitt Aerospace Limited Brake condition monitoring
DE10116662A1 (en) * 2001-04-04 2002-10-10 Porsche Ag Method for monitoring the label life of a ceramic brake disc
DE10161998A1 (en) * 2001-12-18 2003-07-17 Daimler Chrysler Ag Method for control system monitoring, especially of motor vehicle electrical or electronic systems, enables estimation of an aging factor for a whole system rather than just for individual components within it
DE10348951B4 (en) 2003-10-18 2018-07-19 Bayerische Motoren Werke Aktiengesellschaft Method for monitoring the quality of a brake fluid of a motor vehicle
DE102006061656B4 (en) * 2006-12-27 2011-07-21 Continental Automotive GmbH, 30165 Method and control arrangement for estimating the state of wear of at least one electric parking brake
DE102010047705A1 (en) 2010-10-06 2012-04-12 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Method for determining irregularities on a wheel brake of a vehicle and a corresponding device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2604148C2 (en) * 1976-02-04 1986-10-02 Robert Bosch Gmbh, 7000 Stuttgart Monitoring device for an electronic system for storing errors for later analysis
DE2922910A1 (en) * 1979-06-06 1980-12-11 Rau Swf Autozubehoer DISPLAY DEVICE FOR VEHICLES
DE2951753A1 (en) * 1979-12-21 1981-07-02 Alfred Teves Gmbh, 6000 Frankfurt METHOD AND DEVICE FOR MONITORING AN ANTI-BLOCKING SYSTEM
GB2125577B (en) * 1982-08-16 1986-09-24 Nissan Motor Self monitoring system
DE3234727A1 (en) * 1982-09-18 1984-03-22 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart METHOD FOR DETERMINING THE TIME FOR THE MAINTENANCE OF A MOTOR VEHICLE
DE3234637A1 (en) * 1982-09-18 1984-03-22 Alfred Teves Gmbh, 6000 Frankfurt METHOD AND CIRCUIT FOR CONTROLLING A BRAKE-SLIP CONTROL SYSTEM

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993021458A1 (en) * 1992-04-13 1993-10-28 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Clearance detector for a pneumatically operated disc brake
US5372411A (en) * 1992-04-13 1994-12-13 Robert Bosch Gmbh Safety equipment for a motor vehicle
FR2690720A1 (en) * 1992-04-30 1993-11-05 Daimler Benz Ag Method for adjusting the wear of brake linings in a motor vehicle braking system, actuated by a pressurized fluid.
GB2279713B (en) * 1993-07-06 1997-03-19 Daimler Benz Ag Device for detecting brake pad wear and/or faults in a motor vehicle
GB2279713A (en) * 1993-07-06 1995-01-11 Daimler Benz Ag Device for ABS-integrated brake pad wear indication in a motor vehicle
US6512453B1 (en) 1993-07-06 2003-01-28 Daimlerchrysler Ag Motor vehicle ABS-integrated brake pad wear indication apparatus
EP0637534A1 (en) * 1993-08-05 1995-02-08 Mercedes-Benz Ag Method for calculation a wear dependent brake force distribution
US5470134A (en) * 1993-08-05 1995-11-28 Mercedes-Benz Ag Method of determining a wear-dependent braking force distribution
WO1998028172A1 (en) * 1996-12-20 1998-07-02 Robert Bosch Gmbh System for varying and/or evaluating a rotational speed signal
US7099795B1 (en) 1996-12-20 2006-08-29 Robert Bosch Gmbh System for changing and/or evaluating a speed signal
WO2000023305A1 (en) * 1998-10-19 2000-04-27 Alliedsignal Inc. Method and apparatus for monitoring brake operation in an anti-lock or electronic braking system
US6167354A (en) * 1998-10-19 2000-12-26 Alliedsignal Truck Brake Systems Company Method and apparatus for monitoring brake operation in an anti-lock or electronic braking system
RU2623505C2 (en) * 2012-10-03 2017-06-27 КОУНКРЭЙНС Глобал Корпорейшен Brakes operation monitoring
US9803712B2 (en) 2012-10-03 2017-10-31 Konecranes Global Corporation Brake monitoring
EP3023667A1 (en) * 2014-11-21 2016-05-25 ArvinMeritor Technology, LLC Brake pad wear monitoring system

Also Published As

Publication number Publication date
DE3707980A1 (en) 1988-09-22
FR2612143A1 (en) 1988-09-16
GB2202016B (en) 1991-03-27
DE3707980C2 (en) 1995-11-30
FR2612143B1 (en) 1990-01-05
GB8805438D0 (en) 1988-04-07

Similar Documents

Publication Publication Date Title
GB2202016A (en) Brake-monitoring device
US8700285B2 (en) Control device and method for signaling a braking process at a trailer vehicle
JP3894951B2 (en) Method and apparatus for controlling open loop or closed loop of vehicle brake device
GB2397631A (en) A method for determining a brake state
KR101474688B1 (en) Automatic in and out apparatus of Multi Concent
US5845976A (en) Process and device for operating a brake system of a vehicle
US5908983A (en) Method and apparatus for testing the brake system of a vehicle
JP2546851B2 (en) Brake system
US5681992A (en) Process to determine the response pressure of a brake in a vehicle braking system
DE102011100726A1 (en) Method and device for monitoring the brake pad wear and clearance of a service brake in motor vehicles
US5632531A (en) Method and circuit configuration for determining the pedal force as a control quantity for a brake system with anti-lock control
KR970703259A (en) Brake system for a vehicle
JPH09193781A (en) Monitor device for brake device
US4884056A (en) System for displaying trouble in an electronic control system of a motor vehicle
JPH09207763A (en) Method and device for inspecting vehicle brake device
US6087929A (en) Indication device
US6205393B1 (en) Method of improving the control behavior of an antilocking system
GB2382390A (en) Calculating brake disc and caliper temperature with energy balances
US4379331A (en) Failure warning for a vehicle information processing system
EP1968832B1 (en) Shadow zone fault detection
DE3752155T2 (en) Fluid pressure controlled vehicle braking system
EP1125811A1 (en) Method and device for diagnosing a brake switch
DE10127480A1 (en) Method for determining or estimating the tightness or condition of brake pads using a determination of the braking period and intensity
US20230023343A1 (en) Test arrangement for functional testing of a vehicle brake control system
KR20030062535A (en) Warning device for friction pad&#39; wear in brake

Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20080307