GB2127554A - Determination of the time or distance for motor vehicle servicing - Google Patents

Determination of the time or distance for motor vehicle servicing Download PDF

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Publication number
GB2127554A
GB2127554A GB08322836A GB8322836A GB2127554A GB 2127554 A GB2127554 A GB 2127554A GB 08322836 A GB08322836 A GB 08322836A GB 8322836 A GB8322836 A GB 8322836A GB 2127554 A GB2127554 A GB 2127554A
Authority
GB
United Kingdom
Prior art keywords
wear
distance
time
monitored
motor vehicle
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Withdrawn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
GB08322836A
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GB8322836D0 (en
Inventor
Rainer Fritz
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche AG
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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of GB8322836D0 publication Critical patent/GB8322836D0/en
Publication of GB2127554A publication Critical patent/GB2127554A/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
    • B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
    • B60R16/0232—Circuits relating to the driving or the functioning of the vehicle for measuring vehicle parameters and indicating critical, abnormal or dangerous conditions
    • B60R16/0234—Circuits relating to the driving or the functioning of the vehicle for measuring vehicle parameters and indicating critical, abnormal or dangerous conditions related to maintenance or repairing of vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
    • F16D66/02—Apparatus for indicating wear
    • F16D66/021—Apparatus for indicating wear using electrical detection or indication means
    • F16D66/026—Apparatus for indicating wear using electrical detection or indication means indicating different degrees of lining wear
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C5/00—Registering or indicating the working of vehicles
    • G07C5/006—Indicating maintenance

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)

Abstract

In order to determine the time or distance at which a motor vehicle should be serviced, the existing condition of motor vehicle parts prone to wear, e.g. brake and clutch linings, is monitored by measuring apparatus 2, 3. These measured values are fed to a computer 1 in which they are multiplied by weighting factors depending on the load. The computer calculates the length of life to be expected of the motor vehicle parts by comparison of the preexisting wear with a predetermined wear and value and indicates the same on an indicating apparatus 12. Other data taken into account by the computer are cooling oil or water temperature, 4, and engine speed, 5. <IMAGE>

Description

SPECIFICATION Improvements in or relating to determination of the time or distance for motor vehicle servicing The present invention relates to a method of and determining the point in time or distance for servicing a motor vehicle.
Servicing intervals are customarily selected for a given motor vehicle type so that, on the assumption of a high load, the proper functioning of all motor vehicle parts is assured up to the next maintenance service. If relatively short time intervals are determined therefor, it is possible to examine the parts with longer length of life for their operating condition, to exchange the same immediately if necessary or to fix a point in time for the exchange.
Since the longer servicing intervals have recently been selected in the course of rationalization and cost saving, there is a danger that some parts will fail before the next maintenance service is due.
Monitoring installations which are known (German Offenlegungschrift 21 38 944) are of little assistance in connection therewith because they only indicate the respective existing condition and do not provide for an indication of the imminent failure or final wear of a motor vehicle part important for correct operation.
According to one aspect of the invention, there is provided a method of determining the point in time or distance for servicing a motor vehicle, in which the operating condition of motor vehicle parts prone to wear is monitored by measuring devices, and the distance travelled by the vehicle, the operating time necessary therefor, the engine rotational speed and the cooling water or oil temperature are measured and all of the measured values are fed into a computer unit, the method comprising the steps of determining for each monitored vehicle part the preexisting wear and the corresponding distance or time, calculating the length of life to be expected as time or distance by comparison with a predetermined wear and value, and indicating either the minimum time or distance at which, within a predetermined tolerance range, several monitored parts will wear or the time or distance for a part which has worn by more than the predetermined time or distance tolerance range before the other monitored parts.
According to another aspect of the invention there is provided an apparatus for determining the point in time or distance for servicing a motor vehicle, comprising measuring means for monitoring the operating condition of motor vehicle parts prone to wear, further measuring means for determining the distance travelled by the vehicle, the operating time necessary therefor, the engine rotational speed and the cooling water or oil temperature, means for supplying all of the measured values to a computer means, means in the computer means for determining for each monitored vehicle part the preexisting wear and the corresponding distance or time and for calculating the length of life to be expected as time or distance by comparison with a predetermined wear end value, and indicating means for indicating either the minimum time or distance at which, within a predetermined maximum tolerance range, several monitored parts will wear or the time or distance for a part which has worn by more than the predetermined time or distance tolerance range before the other monitored part.
It is thus possible to determine for each motor vehicle individually the point in time for the next maintenance service corresponding to the operating condition in such a manner that as many worn parts as possible are exchanged during a single maintenance service.
For each monitored motor vehicle part, the pre-existing wear and the corresponding distance travelled or time can be determined and the length of life to be expected calculated as time or travel distance by comparison with a predeterminable wear and value, and the minimum time or travel distance at which several monitored parts will wear within a predeterminable maximum tolerance range, or the travel distance for a part which is worn by more than the predetermined time or travel distance tolerance range before the other monitored parts, can be indicated. By comparison of the existing condition of motor vehicle parts prone to wear with standard values obtained from tests, the operating period or maximum distance for which the vehicle can be driven up to the next maintenance service can be determined.As many wearing parts or operating units of the motor vehicle as possible can be included in the monitoring in order to attempt to eliminate all possibel failure sources during a stay in the workshop and prevent the workshop from being revisited after a short period of time.
Since the wear depends on the load at which the motor vehicle is driven, engine rotational speed, cooling water temperature, and vehicle velocity can also be detected and fed as weighted measuring values into the computation of the length of life of the operating parts to be monitored.
The invention will be further described, by way of example with reference to the accompanying drawing, which shows a preferred embodiment of the present invention in schematic block diagram form.
A central computer apparatus 1, which may be of any known conventional construction, is connected to a brake lining sensor or pick-up 2, a clutch lining sensor or pick-up 3, a cooling water or oil temperature sensor or pick-up 4, a rotational speed sensor or pick-up 5, a time indicator 6, a distance travelled indicator 7, a signal transmitter 8 for actuation of an engine starter, and a signal transmitter 9 for indication of coasting cut-out. The computer apparatus 1 processes predetermined values of the wear end values and tolerance ranges which are contained in a storage or memory device 1 0. The distance travelled or time to be expected to the next due maintenance service is calculated therefrom in the computer apparatus and, upon inquiry by means of keys 11, is indicated on an indicating apparatus 12.The new start of the method cycle is determined by means of reset switches 13.
The brake lining sensor or pick-up 2 includes a switch SB1/2O which responds to wear of half the lining thickness. A travel distance of about 25,000 km may correspond to this value. The length of life to be expected, at which a servicing would be necessary, would then amount to twice the travel distance, i.e. 50,000 km. However, a second contact SBO is provided for safety reasons to signal immediately imminent failure.
The vehicle load when clutch actuation takes place is important for assessing wear of the clutch plate lining. The vehicle load is determined according to vehicle velocity ranges v < 5 km/h (starting) and V > km/H. For v < 5 km/h, a weighting factor equal to 5 is used, for v > 5 km/h, a weighting factor equal to 1 is used for a non-actuated drive pedal; and v > 5 km/h, a weighting factor equal to 2 is used for an actuated drive pedal. The number of clutch actuations is measured and multiplied by the weighting factor. A maximum number of weighted actuations, for example 1 5,000 is determined as a wear end value.
The durability of the engine oil depends to a large extent on its operating temperature which is measured as cooling or oil temperatures. The following weighting factors are selected: v < OOC; Weighting factor 4 O < v < 200C; Weighting factor 3 200C < V < 400C; Weighting factor 2 400C < v < 1400C; Weighting factor 1 v > 1400C: Weighting factor 4 For the purpose of wear calculation the weighting factor is multiplied with the number of rotations.
The wear and spark plugs is dependent on the engine rotational speed n. The following weighting factors are used for multiplication by the number of engine rotations: n < 1 ,500 r.p.m.: Weighting factor 2 1 ,000 < n < 5,000 r.p.m.: Weighting factor 1 n > 5,000 r.p.m.: Weighting factor 3 Additionally, during coasting operation with fuel injection turned off, multiplication by a weighting factor of 3 takes place whereas, without coasting cut-out, a weighting factor of 1 is used.
The preexisting wear is then determined from the measured values multiplied by the weighting factors. The attainable overall travel distance or time, which is, identical with the overall length of life of the parts subject to wear can be calculated from the following relation: preexisting wear preexisting travel distance or time permissive wear attainable overall travel distance or time.
The remaining length of life is determined from the difference between the calculated and already used length of life.
If the calculation is performed in terms of distances travelled, then it is possible to convert from the average velocity, for example in km/day, the length of life into days. An indication of these values is possible by readout by means of a pushbutton. Furthermore, it is possible to determine which parts will reach their wear and value to within a predetermined tolerance range, and so that the interval to the next maintenance service is determined.

Claims (14)

Claims
1. A method of determining the point in time or distance for servicing a motor vehicle, in which the operating condition of motor vehicle parts prone to wear is monitored by measuring devices, and the distance travelled by the vehicle, the operating time necessary therefor, the engine rotational speed and the cooling water or oil temperature are measured and all of the measured values are fed into a computer unit, the method comprising the steps of determining for each monitored vehicle part the preexisting wear and the corresponding distance or time, calculating the length of life to be expected as time or distance by comparison with a predetermined wear and value, and indicating either the minimum time or distance at which, within a predetermined maximum tolerance range, several monitored parts will wear or the time or distance for a part which has worn by more than the predetermined time or distance tolerance range before the other monitored parts.
2. A method as claimed in claim 1, in which the length of life to be expected is calculated by multiplication of the preexisting operating time or distance travelled by the ratio of permissible wear to preexisting wear.
3. A method as claimed in claim 2, in which the preexisting wear is determined in the computer unit as the product of measured wear values and weighting factors depend on load.
4. A method as claimed in claim 2 or 3, in which the permissible wear is determined experimentally and/or by calculation and is stored in the computer unit as a predetermined value.
5. A method as claimed in any one of the preceding claims, in which the maximum time or distance tolerance range is determined uniformly for all monitored parts.
6. A method as claimed in any one of claims 1 to 4, in which the maximum time or distance tolerance range is determined separately for each monitored part.
7. A method as claimed in any one of the preceding claims, in which for each monitored part the time or distance up to the predicted final wear of the part is indicated on an indicating apparatus in response to actuation of a pushbutton.
8. An apparatus for determining the point in time or distance for servicing a motor vehicle, comprising measuring means for monitoring the operating condition of motor vehicle parts prone to wear, further measuring means for determining the distance travelled by the vehicle, the operating time necessary therefor, the engine rotational speed and the cooling water or oil temperature, means for supplying all of the measured values to a computer means, means in the computer means for determining for each monitored vehicle part the preexisting wear and the corresponding distance or time and for calculating the length of life to be expected as time or distance by comparison with a predetermined wear end value, and indicating means for indicating either the minimum time or distance at which, within a predetermined maximum tolerance range, several monitored parts will wear or the time or distance for a part which has worn by more than the predetermined time or distance tolerance range before the other monitored part.
9. An apparatus as claimed in claim 8, in which the computer means is arranged to calculate the length of life to be expected by multiplication of the pre-existing operating time or distance travelled by the ratio of permissible wear to preexisting wear.
10. An apparatus as claimed in claim 9, in which the computer means is arranged to determine the preexisting wear as the product of measured wear values and weighting factors dependant on load.
11. An apparatus as claimed in claim 8 or 9, in which the computer means is arranged to determine the permissible wear experimentally and/or by calculation and to store the permissible wear as a predetermined value.
12. An apparatus as claimed in claim 11, in which the permissible wear is determined by both experiment and calculation.
1 3. An apparatus as claimed in any one of claims 8 to 12, in which a maximum time or travel tolerance range is determined uniformly for all monitoring parts.
14. An apparatus as claimed in any of claims 8 to 12, in which a maximum time or travel tolerance range is determined separately for each monitored part.
1 5. An apparatus as claimed in any one of claims 8 to 14, in which the indicating means is arranged to indicate for each monitoring part the time or distance to the expected final wear of the part in response to actuation of a pushbutton.
1 6. A method of determining the point in time or distance for servicing a motor vehicle, substantially as hereinbefore described with reference to and as illustrated in the accompanying drawing.
GB08322836A 1982-09-18 1983-08-25 Determination of the time or distance for motor vehicle servicing Withdrawn GB2127554A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19823234727 DE3234727A1 (en) 1982-09-18 1982-09-18 METHOD FOR DETERMINING THE TIME FOR THE MAINTENANCE OF A MOTOR VEHICLE

Publications (2)

Publication Number Publication Date
GB8322836D0 GB8322836D0 (en) 1983-09-28
GB2127554A true GB2127554A (en) 1984-04-11

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Family Applications (1)

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GB08322836A Withdrawn GB2127554A (en) 1982-09-18 1983-08-25 Determination of the time or distance for motor vehicle servicing

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DE (1) DE3234727A1 (en)
FR (1) FR2533518B1 (en)
GB (1) GB2127554A (en)
IT (1) IT1197676B (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2612143A1 (en) * 1987-03-12 1988-09-16 Teves Gmbh Alfred DEVICE FOR MONITORING THE WEAR OF A MOTOR VEHICLE BRAKING SYSTEM
EP0332769A1 (en) * 1986-04-15 1989-09-20 William Wrigge Motor vehicle maintenance interval monitor
WO1990009645A1 (en) * 1989-02-11 1990-08-23 Morrow And Associates Limited Vehicle monitoring system
EP0426979A2 (en) * 1989-11-10 1991-05-15 Zinser Textilmaschinen GmbH Method and apparatus for ascertaining maintenance intervals on a spinning machine
EP0489261A2 (en) * 1990-12-06 1992-06-10 MAN Nutzfahrzeuge Aktiengesellschaft Device for calculating motor vehicle maintenance interval
EP0836159A3 (en) * 1996-10-09 1999-03-03 O'Donoghue, Conor Improvements in and relating to prime movers
FR2776256A1 (en) * 1998-03-20 1999-09-24 Bosch Gmbh Robert DATA PROCESSING DEVICE FOR MOTOR VEHICLE
WO2002102627A1 (en) * 2001-06-19 2002-12-27 Daimlerchrysler Ag Method for determining the time and extent of maintenance operations
WO2008152836A1 (en) 2007-06-15 2008-12-18 Honda Motor Co., Ltd. Maintenance time notification device
EP2273238B1 (en) * 2009-07-09 2020-09-23 Leine & Linde Ab A method for operating an encoder system and an encoder system

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3728432A1 (en) * 1987-08-26 1989-03-16 Hans Georg Thiel Method for determining the service intervals in motor vehicles
DE3820306A1 (en) * 1988-06-15 1989-12-21 Bayerische Motoren Werke Ag Method and device to determine the service time for changing brake fluid
DE19705946A1 (en) * 1997-02-17 1998-08-20 Audi Ag Method and device for determining the remaining part of an oil change interval of an internal combustion engine
DE10029634B4 (en) * 2000-06-15 2010-08-19 Volkswagen Ag Control procedure for the maintenance of a motor vehicle
US6609051B2 (en) 2001-09-10 2003-08-19 Daimlerchrysler Ag Method and system for condition monitoring of vehicles
DE10310116A1 (en) * 2003-03-06 2004-09-23 Voith Turbo Gmbh & Co. Kg Risk minimization and maintenance optimization by determining damage components from operating data
DE102011113025A1 (en) * 2011-09-09 2013-03-14 Knorr-Bremse Systeme für Schienenfahrzeuge GmbH Brake control device for a brake system of a rail vehicle, brake system, rail vehicle and method for operating a brake control device
DE102014011508A1 (en) 2014-07-31 2015-01-22 Daimler Ag Method and device for operating a device of a motor vehicle
DE102015120203A1 (en) * 2015-11-23 2017-05-24 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Method and system for determining a load on a vehicle
DE102018104665B4 (en) * 2018-03-01 2022-12-01 Rolls-Royce Solutions GmbH Method for operating an internal combustion engine, control device and internal combustion engine

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GB1219092A (en) * 1967-07-26 1971-01-13 Ultra Electronics Ltd Improvements in or relating to function generator arrangements
GB1378694A (en) * 1972-06-09 1974-12-27 United Aircraft Corp Gas turbine engine analyzer
GB1425280A (en) * 1973-03-26 1976-02-18 Bbc Brown Boveri & Cie Method and apparatus for monitoring the serivce life of a stress bearing member
GB2027905A (en) * 1978-08-12 1980-02-27 Vdo Schindling A device for indicating the distance a vehicle can travel
GB2029970A (en) * 1978-05-03 1980-03-26 Sp Uprav Method for determining overhaul life of gas turbine installation
GB1569610A (en) * 1975-11-04 1980-06-18 Hochstein P Method and apparatus for monitoring change in a material

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GB1298627A (en) * 1970-03-20 1972-12-06 Vdo Schindling An operational monitoring system for aircraft
US4258421A (en) * 1978-02-27 1981-03-24 Rockwell International Corporation Vehicle monitoring and recording system
US4277772A (en) * 1980-06-17 1981-07-07 General Motors Corporation Motor vehicle diagnostic and monitoring system
DE3110774A1 (en) * 1981-03-19 1982-10-14 Daimler-Benz Ag, 7000 Stuttgart "METHOD FOR DETERMINING MAINTENANCE AND CARE INTERVALS"
DE3114689C2 (en) * 1981-04-10 1985-08-01 Bayerische Motoren Werke AG, 8000 München Service interval display device for prime movers

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1219092A (en) * 1967-07-26 1971-01-13 Ultra Electronics Ltd Improvements in or relating to function generator arrangements
GB1378694A (en) * 1972-06-09 1974-12-27 United Aircraft Corp Gas turbine engine analyzer
GB1425280A (en) * 1973-03-26 1976-02-18 Bbc Brown Boveri & Cie Method and apparatus for monitoring the serivce life of a stress bearing member
GB1569610A (en) * 1975-11-04 1980-06-18 Hochstein P Method and apparatus for monitoring change in a material
GB2029970A (en) * 1978-05-03 1980-03-26 Sp Uprav Method for determining overhaul life of gas turbine installation
GB2027905A (en) * 1978-08-12 1980-02-27 Vdo Schindling A device for indicating the distance a vehicle can travel

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0332769A1 (en) * 1986-04-15 1989-09-20 William Wrigge Motor vehicle maintenance interval monitor
FR2612143A1 (en) * 1987-03-12 1988-09-16 Teves Gmbh Alfred DEVICE FOR MONITORING THE WEAR OF A MOTOR VEHICLE BRAKING SYSTEM
WO1990009645A1 (en) * 1989-02-11 1990-08-23 Morrow And Associates Limited Vehicle monitoring system
EP0426979A2 (en) * 1989-11-10 1991-05-15 Zinser Textilmaschinen GmbH Method and apparatus for ascertaining maintenance intervals on a spinning machine
EP0426979A3 (en) * 1989-11-10 1991-10-23 Zinser Textilmaschinen Gmbh Method and apparatus for ascertaining maintenance intervals on a spinning machine
EP0489261A2 (en) * 1990-12-06 1992-06-10 MAN Nutzfahrzeuge Aktiengesellschaft Device for calculating motor vehicle maintenance interval
EP0489261A3 (en) * 1990-12-06 1992-10-21 Man Nutzfahrzeuge Aktiengesellschaft Device for calculating motor vehicle maintenance interval
EP0836159A3 (en) * 1996-10-09 1999-03-03 O'Donoghue, Conor Improvements in and relating to prime movers
FR2776256A1 (en) * 1998-03-20 1999-09-24 Bosch Gmbh Robert DATA PROCESSING DEVICE FOR MOTOR VEHICLE
WO2002102627A1 (en) * 2001-06-19 2002-12-27 Daimlerchrysler Ag Method for determining the time and extent of maintenance operations
US7286916B2 (en) 2001-06-19 2007-10-23 Daimlerchrysler Ag Method for determining the time and extent of maintenance operations
WO2008152836A1 (en) 2007-06-15 2008-12-18 Honda Motor Co., Ltd. Maintenance time notification device
EP2157000A1 (en) * 2007-06-15 2010-02-24 Honda Motor Co., Ltd. Maintenance time notification device
EP2157000A4 (en) * 2007-06-15 2010-07-14 Honda Motor Co Ltd Maintenance time notification device
US8285437B2 (en) 2007-06-15 2012-10-09 Honda Motor Co., Ltd. Maintenance time notification device
CN101678817B (en) * 2007-06-15 2013-03-13 本田技研工业株式会社 Maintenance time notification device
EP2273238B1 (en) * 2009-07-09 2020-09-23 Leine & Linde Ab A method for operating an encoder system and an encoder system

Also Published As

Publication number Publication date
IT8348688A0 (en) 1983-07-14
FR2533518B1 (en) 1988-09-16
IT1197676B (en) 1988-12-06
FR2533518A1 (en) 1984-03-30
GB8322836D0 (en) 1983-09-28
DE3234727A1 (en) 1984-03-22

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