SE537275C2 - Method and apparatus for detecting strap rupture on a strap arranged in a motor vehicle - Google Patents

Method and apparatus for detecting strap rupture on a strap arranged in a motor vehicle Download PDF

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Publication number
SE537275C2
SE537275C2 SE1350809A SE1350809A SE537275C2 SE 537275 C2 SE537275 C2 SE 537275C2 SE 1350809 A SE1350809 A SE 1350809A SE 1350809 A SE1350809 A SE 1350809A SE 537275 C2 SE537275 C2 SE 537275C2
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SE
Sweden
Prior art keywords
belt
generator
function
vehicle
driven
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Application number
SE1350809A
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Swedish (sv)
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SE1350809A1 (en
Inventor
Gunnar Ledfelt
Dan Magnusson
Patrik Jansson
Holger Dreher
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Scania Cv Ab
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Application filed by Scania Cv Ab filed Critical Scania Cv Ab
Priority to SE1350809A priority Critical patent/SE537275C2/en
Priority to DE102014009508.8A priority patent/DE102014009508B4/en
Publication of SE1350809A1 publication Critical patent/SE1350809A1/en
Publication of SE537275C2 publication Critical patent/SE537275C2/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
    • F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/14—Safety means against, or active at, failure of coolant-pumps drives, e.g. shutting engine down; Means for indicating functioning of coolant pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/02—Gearings; Transmission mechanisms
    • G01M13/023—Power-transmitting endless elements, e.g. belts or chains
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/14—Indicating devices; Other safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • F02D2041/228—Warning displays
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Testing Of Engines (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

537 27 SAMMANDRAG Ett forfarande for detektering av brott pa en rem (1) som är anordnad i ett motorfordon for att drivas av en forbranningsmotor (2) och darigenom sjalv driva atminstone en generator (3) och en kylvatskepump (4), varvid fordonet uppvisar medel (5) utformade att faststalla tillstandet hos generatorns funktion och sanda ut en signal vid klanderfri funktion hos generatorn, uppvisar steget att testa att reglera, vid upphorande av namnda medel att sanda ut namnda signal, funktionen hos en annan komponent (4) hos for- donet an generatorn, vars funktion har en reglerbarhet som kraver att remmen ej är avbruten. Det bestams att brott pa remmen (1) foreligger om och endast om det vid namnda testning fast-stalls att namnda funktion inte ar reglerbar. 537 27 SUMMARY A method for detecting breakage of a belt (1) arranged in a motor vehicle to be driven by an internal combustion engine (2) and thereby itself drive at least one generator (3) and a cooling water pump (4), the vehicle having means (5) designed to determine the state of the operation of the generator and emit a signal in faultless operation of the generator, the step of testing to regulate, upon cessation of said means emitting said signal, the operation of another component (4) of - the actuator of the generator, the function of which has an adjustability which requires that the belt is not interrupted. It is determined that a break in the belt (1) exists if and only if it is established during the said testing that the said function is not controllable.

Description

537 27 spand over sa att den inte langre kan driva flagon komponent den är avsedd att driva. 537 27 spand over said that it can no longer drive the flake component it is intended to drive.

Vid ett rembrott hos ett namnt motorfordon, stannar kylvatske- pumpen, vilket medfOr att kylningen av motorn uteblir. Det är dã viktigt att motorn stannar sa snart som mojligt for att den inte ska overhettas och skadas. Av denna anledning är det av yttersta vikt att rembrott kan detekteras nar det val upptrader. In the event of a belt breakage of a named motor vehicle, the cooling water pump stops, which means that the engine does not cool down. It is then important that the engine stops as soon as possible so that it does not overheat and be damaged. For this reason, it is of utmost importance that belt breakage can be detected when the choice occurs.

BAKGRUNDSTEKNIK US 2006/0054128 Al beskriver ett forfararande av inledningsvis definierat slag for detektering av rembrott, vid vilket funktionen hos den av remmen drivna generatorn overvakas och det utgas ifr5n att rembrott foreligger nar generatorn inte fungerar som den ska. Den slutsats som dal- dras vad galler forekomst av rembrott kan under vissa omstandigheter vara felaktig. BACKGROUND ART US 2006/0054128 A1 describes a method of initially defined kind for detecting belt breakage, in which the function of the generator driven by the belt is monitored and it is assumed that belt breakage is present when the generator does not function properly. The conclusion that is diminished as to the occurrence of belt breakage may in certain circumstances be incorrect.

Det är ocksa [cant att nar namnda medel hos fordonet upphor att 20 sanda ut en signal som anger att generatorns funktion är klanderfri tanda en varningslampa i fordonet och infora en kraftig momentbegransning hos motorn for att minska risken for Overhettning av den innan foraren har mojlighet att stanga av motorn. Darvid utgas det ifran att rembrott foreligger nar namnda signal inte langre sands ut, och fordonet stalls stilla sa snart som miij- ligt och anses vara i bradskande reparationstillstand (VOR = Vehicle Off Road). 2 537 27 Att generatorn inte fungerar klanderfritt kan dock ha andra orsaker an en forekomst av ett rembrott, sa att dessa forfaranden for detektering av rembrott kan leda till onodiga stopp av ett fordon. It is also possible that when said means of the vehicle ceases to emit a signal indicating that the function of the generator is faultless, light a warning light in the vehicle and introduce a strong torque limitation in the engine to reduce the risk of overheating it before the driver has the opportunity to switch off the engine. It is assumed that there is a belt break when the said signal is no longer sent out, and the vehicle is stopped as soon as possible and is considered to be in a state of emergency repair (VOR = Vehicle Off Road). 2 537 27 However, the failure of the generator to operate properly can have other causes than the occurrence of a belt breakage, so that these procedures for detecting belt breakage can lead to unnecessary stopping of a vehicle.

SAMMANFATTNING AV UPPFINNINGEN Syftet med foreliggande uppfinning är att tillhandahalla ett forfarande av inledningsvis definierat slag, vilket är forbattrat i atminstone nagot hanseende med avseende pa tidigare kanda sa10 dana forfaranden. SUMMARY OF THE INVENTION The object of the present invention is to provide a method of initially defined kind, which is improved in at least some respect with respect to prior art such methods.

Detta syfte uppnas enligt uppfinningen genom att tillhandahalla ett sadant forfarande som uppvisar sardragen hos bifogade patentkrav 1. This object is achieved according to the invention by providing such a method which has the features of appended claim 1.

Genom att vid ej klanderfri funktion hos generatorn testa att reglera funktionen hos en annan komponent hos fordonet an generatorn, vars funktion har en reglerbarhet som kraver att remmen ej är avbruten, kan det med utgangspunkt fran huruvida denna komponent visar sig ha reglerbarhet eller ej tillforlitligt bestam- mas om remmen är hel eller avbruten/lossnat. Uppfinningen grundar sig saledes pa att vid franvaro av namnda signal, vilket sager att generatorn inte fungerar klanderfritt, cla gars aktivt nagot genom att testa reglerbarheten hos en namnd komponent, som endast later sig regleras vid ej avbruten rem. I det fall regle- ring är mojlig kan rembrott uteslutas och det bestams cla att anledningen till att generatorn inte fungerar som den ska maste vara en annan an att rembrott foreligger. T ex kan det ha upptratt nagot elektriskt fel i generatorn, sasom i dess regulator eller i en likriktarbrygga hos denna, vilket kan resultera i utebliven eller 3 537 27 reducerad laddning av till generatorn anslutna batterier, men i dessa fall gar det utmarkt att kora fordonet vidare pa enbart strom fran batterierna, kanske i flera timmar. Det uppfinningsenliga forfarandet kan saledes reducera onodiga stopp av fordonet genom att vid mindre akuta generatorproblem tillata fortsatt fard av fordonet under viss tid. Visar testet att det inte gar att reglera komponenten ifraga, cla bestams att rembrott foreligger och motorfordonet hanteras darefter, d v s stoppas sã snart det gar. By testing the function of another component of the vehicle with the generator, whose function has a controllability that requires that the belt is not interrupted, it can be based on whether this component proves to have controllability or unreliable determination. - mash if the belt is intact or interrupted / loosened. The invention is thus based on the fact that in the absence of said signal, which says that the generator does not work flawlessly, something is actively clarified by testing the controllability of a named component, which can only be regulated with uninterrupted belt. In the event that regulation is possible, belt breakage can be ruled out and it is decided that the reason why the generator does not function as it should must be different from the fact that belt breakage exists. For example, there may have been some electrical fault in the generator, such as in its regulator or in a rectifier bridge thereof, which may result in no or reduced charging of batteries connected to the generator, but in these cases it is excellent to run the vehicle. further on only power from the batteries, perhaps for several hours. The method according to the invention can thus reduce unnecessary stops of the vehicle by allowing the vehicle to continue driving for a certain period of time in the event of less acute generator problems. If the test shows that it is not possible to regulate the component in question, it is determined that there is a belt breakage and the motor vehicle is then handled, ie it is stopped as soon as possible.

"Att namnda medel upphor att sanda ut namnda signal" menas har att ett kontinuerligt upphorande av utsandande av signalen foreligger, d v s inte att signalen av flagon anledning tillfalligt faller bort och aterkommer, utan vid utforande av steg b) och c) ska signalen vara permanent forsvunnen. "Om och endast om" betyder att om det som foljer pa detta ej galler da bestams att det inte foreligger nagot rembrott. "That said means ceases to transmit said signal" means that there is a continuous cessation of transmission of the signal, ie not that the signal for flake reason occasionally falls away and reappears, but when performing steps b) and c) the signal must be permanent disappeared. "If and only if" means that if what follows on this does not apply then it is determined that there is no belt breakage.

Enligt en utforingsform av uppfinningen är det kylvatskepumpen som man testar att reglera funktionen hos i steg b). Funktionen hos denna pump gar inte att reglera om rembrott foreligger, var- for en sadan test kan anvandas f6r att bestamma om generatorns bristfalliga funktion beror pa rembrott eller ej. According to an embodiment of the invention, it is the cooling water pump which is tested to regulate the function of in step b). The function of this pump cannot be to determine whether there is a belt break, so such a test can be used to determine whether the generator's malfunction is due to a belt break or not.

Darvid kan enligt vidareutvecklingar av denna utforingsform vid genomforande av steg b) vatsketrycket levererat av pumpen, varvtalet i pumpen eller flodet i pumpen matas under forsok till reglering av pumpen for att undersoka om vardet pa vald parameter forandras och i sa fall reglerbarhet hos kylvatskepumpen kan faststallas. 4 537 27 Enligt en annan utforingsform av uppfinningen utfors forfarandet for ett fordon som uppvisar en luftkonditioneringsanlaggning som drivs av ett hjul drivet av namnda rem att rotera, och i steg b) testas att reglera luftkonditioneringsanlaggningen och darvid faststalla reglerbarheten av dess funktion genom att mata en parameter has ett medium beroende av driften hos anlaggningen. Namnda parameter kan vara temperatur hos av anlaggningen levererad luft, men aven t. ex. teniperatur, tryck eller flode hos ett koldbarande medium hos luftkonditioneringsanlaggningen. Ar namnda rem av fungerar inte luftkonditioneringsanlaggningen som den ska och kan dá inte regleras, sa att ett testande av dennas reglerbarhet kan anvandas for att tillforlitligt bestamma om rembrott foreligger eller ej. According to further developments of this embodiment, when performing step b) the liquid pressure supplied by the pump, the speed in the pump or the flow in the pump can be fed during attempts to regulate the pump to examine whether the value of the selected parameter changes and in that case controllability of the cooling water pump can be determined . According to another embodiment of the invention, the method is performed for a vehicle having an air conditioning system driven by a wheel driven by said belt to rotate, and in step b) being tested to control the air conditioning system and thereby determining the controllability of its function by feeding a parameter has a medium depending on the operation of the plant. The said parameter can be the temperature of air delivered by the plant, but also e.g. temperature, pressure or flow of a refrigerant in the air conditioner. If the said belt is off, the air conditioning system does not work as it should and cannot then be regulated, so that a test of its controllability can be used to reliably determine whether a belt breakage exists or not.

Enligt en annan utforingsform av uppfinningen utfors forfarandet pa ett fordon med en kylflakt driven av namnda rem, och i steg b) testas att reglera kylflaktens funktion och darvid kontrollera reglerbarheten genom att mata varvtalet hos kylflakten. Darvid skulle motorfordonets hastighet aven kunna beaktas i det fall ett flakthjul hos namnda flakt är sa anordnat att det aven kan drivas av fordonets fartvind. According to another embodiment of the invention, the process is performed on a vehicle with a cooling flap driven by said belt, and in step b) it is tested to regulate the function of the cooling flap and thereby check the controllability by measuring the speed of the cooling flap. In this case, the speed of the motor vehicle could also be taken into account in the event that a flat wheel of said flat is arranged so that it can also be driven by the vehicle's wind speed.

Uppfinningen avser aven en anordning for detektering av brott pa en rem enligt bifogade sjalvstandiga anordningspatentkrav. The invention also relates to a device for detecting breakage of a belt according to the appended independent device patent claims.

Funktionen has en sadan anordning samt anordningarna enligt utforingsformer definierade i bifogade osjalvstandiga patentkrav framgar av beskrivningen ovan av utforingsformerna av det uppfinningsenliga forfarandet. 537 27 Uppfinningen avser aven ett datorprogram uppvisande de i patentkrav 12 uppraknade sardragen, en datorprogramprodukt uppvisande de i patentkrav 13 uppraknade sardragen, en elektronisk styrenhet uppvisande de i patentkrav 14 uppraknade sardragen och ett motorfordon enligt patentkraven 15 och 16. The function has such a device and the devices according to embodiments defined in the appended dependent claims appear from the description above of the embodiments of the method according to the invention. The invention also relates to a computer program having the sardra features listed in claim 12, a computer program product having the sardra features listed in claim 13, an electronic control unit having the sardra features listed in claim 14 and a motor vehicle according to claims 15 and 16.

Andra fordelaktiga sardrag hos samt fordelar med uppfinningen framgar av den nedan foljande beskrivningen. Other advantageous features and advantages of the invention will become apparent from the following description.

KORT BESKRIVNING AV RITNINGARNA Har nedan beskrivs sasom exempel anforda utforingsformer av uppfinningen under hanvisning till bifogade ritningar, pa vilka: Fig 1är en forenklad vy av nagra komponenter hos ett mo- torfordon drivna av en namnd rem for illustrerande av ett forfarande enligt en utforingsform av uppfinningen, Fig 2är en Fig 1 motsvarande vy for illustrerande av forfa- randen enligt andra utforingsformer av uppfinningen, Fig 3är ett flodesdiagram som visar ett forfarande enligt en utforingsform av uppfinningen, och Fig 4är en principskiss Over en elektronisk styrenhet far implementering av ett forfarande enligt uppfinningen. BRIEF DESCRIPTION OF THE DRAWINGS The following is an exemplary embodiment of the invention with reference to the accompanying drawings, in which: Fig. 1 is a simplified view of some components of a motor vehicle driven by a named belt to illustrate a method according to an embodiment of the invention. Fig. 2 is a Fig. 1 corresponding view for illustrating the method according to other embodiments of the invention, Fig. 3 is a river diagram showing a method according to an embodiment of the invention, and Fig. 4 is a schematic diagram of an electronic control unit implementing a method according to the invention. .

DETALJERAD BESKRIVNING AV UTFORINGSFORMER AV UPPFINNINGEN 6 537 27 I Fig 1 visas schematiskt en anordning for detektering av brott pa en rem 1 som är anordnad i ett motorfordon M for att drivas av en forbranningsmotor 2 och att darigenom sjalv driva en generator 3 och en kylvatskepump 4 for kylning av forbranningsmotorn. DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION Fig. 1 Fig. 1 schematically shows a device for detecting breakage of a belt 1 which is arranged in a motor vehicle M to be driven by an internal combustion engine 2 and thereby to drive a generator 3 and a cooling water pump 4 itself. for cooling the internal combustion engine.

I anordningen ingar schematiskt antydda medel 5 utformade att faststalla tillstandet hos generatorns funktion och sanda ut en signal vid klanderfri funktion hos generatorn. Denna signal sands vid sadan klanderfri funktion vidare till en inrattning 6. Klanderfri funktion innebar att generatorn vid drift av forbranningsmotorn 2 fungerar felfritt. Fel hos generatorn maste darvid inte nadvan- digtvis markas pa fordonets funktion, sasom till batterier levererad laddningsstrom eller strom till annan utrustning om kapacitetsutnyttjandet hos sadan utrustning ej är hogt. Namnda fel kan bero pa att remmen 1 gatt av, sa att en rotor hos generatorn inte roterar, eller att generatorns regulator fungerar bristfalligt eller nagon komponent hos en likriktarbrygga has generatorn gall sander. Nagon lindning has generatorns stator kan aven ha Ott sander. Nar nagot av detta eller annat fel hos generatorns funktion intraffar upphor namnda medel 5 att sanda namnda signal till inrattningen 6. The device schematically indicates means 5 designed to determine the state of the operation of the generator and send out a signal during faultless operation of the generator. This signal is transmitted in such a fault-free function to a device 6. A fault-free function meant that the generator operates faultlessly when operating the internal combustion engine 2. Faults in the generator must not necessarily be marked on the vehicle's function, such as battery power supplied to batteries or power to other equipment if the capacity utilization of such equipment is not high. Said fault may be due to the belt 1 coming off, so that a rotor of the generator does not rotate, or that the regulator of the generator is malfunctioning or some component of a rectifier bridge has the generator bile sands. Some winding has the generator's stator can also have Ott sander. When any of this or any other fault of the function of the generator occurs, said means 5 ceases to send said signal to the device 6.

Anordningen innefattar vidare organ 7 anordnade att vid upphorande av namnda medel att sanda ut namnda signal testa att reglera funktionen hos en annan komponent hos fordonet an gene- ratorn, i det i Fig 1 visade fallet kylvatskepumpen 4, varvid denna komponent har en funktion som for att vara reglerbar kraver att namnda rem ej ar avbruten. Inrattningen 6 är utformad att mottaga information fran medlet 5 och organet 7 och bestamma att brott pa remmen 1 foreligger om och endast om det av namnda organ faststalls att namnda funktion has namnda komponent ej är 7 537 27 reglerbar samtidigt som medlet 5 anger att generatorn inte fungerar klanderfritt. The device further comprises means 7 arranged to, upon cessation of said means of transmitting said signal, test to regulate the function of another component of the vehicle and the generator, in the case shown in Fig. 1, the coolant pump 4, this component having a function which to be adjustable requires that the said strap is not interrupted. The device 6 is designed to receive information from the means 5 and the means 7 and determine that a break in the belt 1 exists if and only if it is determined by said means that said function has said component is not controllable while the means 5 indicates that the generator does not works flawlessly.

Vid bestammande av att rembrott foreligger sands denna inform- ation vidare till en display 8 som visar detta for foraren, t ex genom att tanda en rod lampa. Inrattningen 6 kan aven vara utformad att sanda en annan signal till displayen 8 for att tanda en annan lampa, t ex en gul lampa, om medlet 5 har upphort att sanda ut sin signal om klanderfri funktion hos generatorn men testet utfort av organet 7 visat att kylvatskepumpen gar att re- glera och det darmed bestamts att inget rembrott foreligger. When determining that a belt break is present, this information is passed on to a display 8 which shows this to the driver, for example by lighting a red lamp. The device 6 may also be designed to send another signal to the display 8 to light another lamp, for example a yellow lamp, if the means 5 has ceased to transmit its signal of faultless operation of the generator but the test performed by the means 7 has shown that the coolant pump can be regulated and it has thus been determined that there is no belt breakage.

I foreliggande fall är namnda organ 7 utformade att under forsok till reglering av kylvatskepumpen mata en parameter has denna, sasom ett vatsketryck, ett varvtal eller ett flode has vatskan, van- ligtvis vatten, pumpad darav. Darvid utgas det ifran att dubbelfel inte forekommer, d v s att det inte är mojligt att nagot annat an ett rembrott fororsakar ett bortfall av reglerbarheten hos kylvatskepumpen samtidigt som fel hos generatorn upptrader. Dock bar naturligtvis funktionen hos organet 7, genom vilket reglering av kylvatskepumpen testas, automatiskt kontrolleras med lampliga intervaller. In the present case, said means 7 are designed to, during attempts to regulate the cooling water pump, feed a parameter having it, such as a water pressure, a speed or a flood has the water, usually water, pumped therefrom. This assumes that double faults do not occur, ie that it is not possible for anything other than a belt breakage to cause a loss of controllability of the coolant pump at the same time as faults in the generator occur. However, of course, the operation of the means 7, through which control of the coolant pump is tested, was automatically checked at appropriate intervals.

Med hjalp av Fig 2 illustreras en mangd olika utforingsformer av en anordning enligt uppfinningen och forfaranden enligt uppfin- ningen. De komponenter som finns med i Fig 1 är forsedda med samma hanvisningsbeteckningar som dar. Har visas en rad andra komponenter som kan drivas av remmen 1 och vilkas funktion är beroende av om namnda rem är hel eller avbruten och har en reglerbarhet som kraver att remmen ej är avbruten, sa att ett tes- 8 537 27 tande att reglera dessa komponenter kan anvandas for att bestamma om rembrott foreligger eller ej. Using Fig. 2, a variety of embodiments of a device according to the invention and methods according to the invention are illustrated. The components included in Fig. 1 are provided with the same male reference numerals as dar. A number of other components are shown which can be driven by the belt 1 and whose function depends on whether said belt is whole or interrupted and has an adjustability which requires that the belt is not interrupted, so that a test to control these components can be used to determine whether a belt breakage exists or not.

Det visas organ 7' utformade att testa och reglera fun ktionen hos en i fordonet anordnad luftkonditioneringsanlaggning som drivs av ett hjul 9 drivet av namnda rem att rotera. Inrattningen 6 be-stammer har att ett rembrott foreligger om, och endast om, det vid testandet faststalls att luftkonditioneringsanlaggningen inte later sig regleras. Darvid kan vid forsok till sadan reglering lamp- lig parameter, sasom temperatur hos luftflode eller temperatur, tryck eller flode hos koldbarande medium, hos luftkonditioneringsanlaggningen matas. There are shown means 7 'designed to test and regulate the function of an air conditioning system arranged in the vehicle which is driven by a wheel 9 driven by said belt to rotate. The device 6 stipulates that a belt breakage is present if, and only if, it is determined during the testing that the air conditioning system cannot be regulated. In the case of attempts at such regulation, a suitable parameter, such as temperature of air flow or temperature, pressure or flow of cold-carrying medium, can be supplied to the air conditioning system.

Det visas aven att anordningen kan innefatta organ 7" utformade att testa att reglera funktionen hos en kylflakt 10 driven av namnda rem och darvid kontrollera reglerbarheten genom att mata varvtalet hos kylflakten. Kan vid begaran om nytt varvtal hos kylflakten detta aven uppnas, da kan forekomst av rembrott uteslutas. It is also shown that the device may comprise means 7 "designed to test to regulate the function of a cooling flap 10 driven by said belt and thereby check the controllability by feeding the speed of the cooling flap. If the request for a new speed of the cooling flap can also be achieved, then occurrence of belt breakage is excluded.

I Fig 3 visas ett flodesdiagram som illustrerar ett forfarande enligt en utforingsform av uppfinningen for detektering av brott pa en rem som är anordnad i ett motorfordon far att drivas av en forbranningsmotor och darigenom sjalv driva atminstone en genera- tor och en kylvatskepump. Forfarandet kan utforas med en anordning av den typ som illustreras i Fig 1 och 2. I ett forsta steg Si fragas om en signal om klanderfri generatorfunktion sands ut fran namnda generator. Om svaret pa denna fraga är nej fortsatts med ett steg Sz, i vilket testning sker av reglerbarheten has en annan komponent an generatorn vars reglerbarhet kraver hel 9 537 27 rem. Sedan stalls i steg S3 fragan om namnda komponent uppvisar reglerbarhet. Om svaret pa denna fraga ãr ja bestams i steg S4 att rembrott ej foreligger, men am svaret pa denna fraga är nej bestams i steg S5 att rembrott foreligger. Fig. 3 shows a flow diagram illustrating a method according to an embodiment of the invention for detecting breakage of a belt arranged in a motor vehicle which is driven by an internal combustion engine and thereby itself drives at least one generator and a cooling water pump. The process can be performed with a device of the type illustrated in Figs. 1 and 2. In a first step Si is asked if a signal of faultless generator function is emitted from said generator. If the answer to this question is no, continue with a step Sz, in which testing of the controllability takes place, there is another component to the generator whose controllability requires a full 9 537 27 belts. Then, in step S3, the question of whether said component exhibits controllability is asked. If the answer to this question is yes, in step S4 it is determined that there is no belt breakage, but if the answer to this question is no, it is determined in step S5 that there is a belt break.

Datorprogramkod for implementering av ett forfarande enligt uppfinningen är lampligen inkluderad i ett datorprogram som är inlasningsbart till internminnet hos en dator, sasom internminnet hos en elektronisk styrenhet hos en forbranningsmotor. Ett sa- dant datorprogram är lampligen tillhandahallet via en datorpro- gramprodukt innefattande ett av en elektronisk styrenhet lasbart datalagringsmedium, vilket datalagringsmedium har datorprogrammet lagrat darpa. Namnda datalagringsmedium 6r exempelvis ett optiskt datalagringsmedium i form av en CD-ROM-skiva, en DVD-skiva etc., ett magnetiskt datalagringsmedium i form av en harddisk, en diskett, ett kassettband etc., eller ett Flashminne eller ett minne av typen ROM, PROM, EPROM eller EEPROM. Computer program code for implementing a method according to the invention is suitably included in a computer program which can be loaded into the internal memory of a computer, such as the internal memory of an electronic control unit of an internal combustion engine. Such a computer program is suitably provided via a computer program product comprising a data storage medium which can be read by an electronic control unit, which data storage medium has the computer program stored there. Said data storage medium 6 is, for example, an optical data storage medium in the form of a CD-ROM, a DVD disc, etc., a magnetic data storage medium in the form of a hard disk, a floppy disk, a cassette tape, etc., or a flash memory or a ROM type memory. , PROM, EPROM or EEPROM.

Fig. 4 illustrerar mycket schematiskt en elektronisk styrenhet 11 innefattande ett exekveringsmedel 12, sasom en central proces- sorenhet (CPU), for exekvering av datorprogramvara. Exekveringsmedlet 12 kommunicerar med ett minne 13, exempelvis av typen RAM, via en databuss 14. Styrenheten 11 innefattar aven datalagringsmedium 15, exempelvis i form av ett Flashminne el- ler ett minne av typen ROM, PROM, EPROM eller EEPROM. Exekveringsmedlet 12 kommunicerar med datalagringsmediet 15 via databussen 14. Ett datorprogram innefattande datorprogramkod for implementering av ett forfarande enligt uppfinningen, exempelvis i enlighet med den i Fig. 3 illustrerade utforingsformen, är lagrat pa datalagringsmediet 15. 537 27 Uppfinningen är givetvis inte pa nagot satt begransad till de ovan beskrivna utforingsformerna, utan en mangd mojligheter till modifikationer darav torde vara uppenbara far en fackman pa omra- det utan att denne for den skull avviker fran uppfinningens ram sadan denna definieras i bifogade patentkrav. Fig. 4 very schematically illustrates an electronic control unit 11 comprising an execution means 12, such as a central processing unit (CPU), for executing computer software. The execution means 12 communicates with a memory 13, for example of the RAM type, via a data bus 14. The control unit 11 also comprises data storage medium 15, for example in the form of a Flash memory or a memory of the type ROM, PROM, EPROM or EEPROM. The execution means 12 communicates with the data storage medium 15 via the data bus 14. A computer program comprising computer program code for implementing a method according to the invention, for example in accordance with the embodiment illustrated in Fig. 3, is stored on the data storage medium 15. The invention is of course not limited in any way. to the embodiments described above, without a multitude of possibilities for modifications thereof, it will be apparent to a person skilled in the art without departing from the scope of the invention as defined in the appended claims.

Det papekas att det hos motorfordonet kan finnas andra komponenter an de visade, vilka har en funktion vars reglerbarhet ar beroende av om namnda rem er hel eller avbruten och vars funktion kan testas att regleras for att bestamma om rembrott foreligger eller ej nar namnda medel indikerar att generatorn inte fungerar som den ska. 11 It is pointed out that the motor vehicle may have other components than those shown, which have a function whose controllability depends on whether said belt is whole or interrupted and whose function can be tested to determine whether belt belt failure exists or not when said means indicate that the generator is not working properly. 11

Claims (16)

537 27 Patentkrav 1. Forfarande for detektering av brott pa en rem (1) som är anordnad i ett motorfordon (M) for att drivas av en forbran- ningsmotor (2) och darigenom sjalv driva atminstone en gene- rator (3) och en kylvatskepump (4), varvid fordonet uppvisar medel (5) formade att faststalla tillstandet hos generatorns funktion och sanda ut en signal vid klanderfri funktion hos generatorn, kannetecknat darav, att det innefattar stegen attA method for detecting breakage of a belt (1) arranged in a motor vehicle (M) for being driven by an internal combustion engine (2) and thereby driving at least one generator (3) and a cooling water pump (4), the vehicle having means (5) shaped to determine the state of operation of the generator and emit a signal of faultless operation of the generator, characterized in that it comprises the steps of 1. bestamma att en forutsattning far forekomst av brott pa namnda rem (1) är att namnda medel (5) upphor att sanda ut namnda signal, 2. testa att reglera, vid upphorande av namnda medel att sanda ut namnda signal, funktionen hos en annan kompo- nent (4, 9, 10) hos fordonet an generatorn, vars funktion har en reglerbarhet som kraver att remmen ej är avbruten, och 3. bestamma att brott pa namnda rem foreligger om och end- ast om det vid genomforande av steg b) faststalls att namnda funktion inte är reglerbar.Determine that a precondition for the occurrence of a breach of said belt (1) is that said means (5) ceases to transmit said signal, 2. try to regulate, upon cessation of said means to transmit said signal, the function of a another component (4, 9, 10) of the vehicle to the generator, the function of which has a controllability which requires that the belt is not interrupted, and 3. determine that a break in said belt is present if and only if it is performed in steps b) establishes that said function is not controllable. 2. Forfarande enligt krav 1, kannetecknat darav, att det är kylvatskepumpen (4) som man testar att reglera funktionen hos i steg b).Method according to claim 1, characterized in that it is the cooling water pump (4) which is tested to regulate the function of in step b). 3. Forfarande enligt krav 2, kannetecknat darav, att vid genomforande av steg b) mats vatsketrycket levererat av kylvatske- pumpen (4) for att faststalla forekomst av reglerbarhet. 12 537 27Method according to claim 2, characterized in that during the execution of step b) the liquid pressure supplied by the cooling water pump (4) is fed to determine the occurrence of controllability. 12 537 27 4. Forfarande enligt krav 2, kannetecknat darav, att vid genomforande av steg b) mats varvtalet i kylvatskepumpen (4) far att faststalla forekomst av reglerbarhet.Method according to Claim 2, characterized in that when carrying out step b) the speed in the cooling water pump (4) is fed to determine the occurrence of controllability. 5. Forfarande enligt krav 2, kannetecknat darav, att vid genom- forande av steg b) mats flodet i kylvatskepumpen (4) for att faststalla forekomst av reglerbarhet.Method according to claim 2, characterized in that during the execution of step b) the flow is fed into the cooling water pump (4) to determine the occurrence of controllability. 6. Forfarande enligt krav 1, kannetecknat darav, att det utfors pa ett fordon som uppvisar en luftkonditioneringsanlaggning som drivs av ett hjul (9) drivet av namnda rem (1) att rotera, och att i steg b) testas att reglera luftkonditioneringsanlaggningen och darvid faststalla reglerbarheten av dess funktion genom att mata en parameter hos ett medium beroende av driften hos anlaggningen.A method according to claim 1, characterized in that it is performed on a vehicle having an air conditioning system driven by a wheel (9) driven by said belt (1) to rotate, and that in step b) it is tested to control the air conditioning system and thereby determine the controllability of its function by feeding a parameter of a medium depending on the operation of the plant. 7. F6rfarande enligt krav 1, kannetecknat darav, att det utfors pa ett fordon med en kylflakt (10) driven av namnda rem (1), och att i steg b) testas att reglera kylflaktens funktion och darvid kontrollera reglerbarheten genom att mata varvtalet hos kylflakten.A method according to claim 1, characterized in that it is performed on a vehicle with a cooling surface (10) driven by said belt (1), and that in step b) it is tested to regulate the function of the cooling surface and thereby check the controllability by measuring the speed of the cooling surface. 8. Anordning for detektering av brott pa en rem (1) som är anordnad i ett motorfordon far att drivas av en farbranningsmo- tor (2) och att darigenom sjalv driva atminstone en generator (3) och en kylvatskepump (4), varvid fordonet uppvisar medel (5) utformade att faststalla tillstandet hos generatorns funktion och sanda ut en signal vid klanderfri funktion hos genera-torn, 13 537 27 kannetecknad darav, att den innefattar organ (7, 7', 7") anordnade att vid upphorande av namnda medel (5) att sanda ut namnda signal testa att reglera funktionen hos en annan komponent (4, 9, 10) hos fordonet an generatorn (3), varvid denna komponent har en funktion som far att vara reglerbar kraver att namnda rem ej är avbruten, samt en inrattning (6) utformad att mottaga information fran namnda medel (5) och namnda organ (7, 7', 7") och bestamma att brott p5 namnda rem foreligger om och endast om det av namnda organ fast- stalls att namnda funktion hos namnda komponent ej ar reglerbar.A device for detecting breakage of a belt (1) arranged in a motor vehicle is driven by a combustion engine (2) and thereby itself drives at least one generator (3) and a cooling water pump (4), the vehicle means (5) designed to determine the state of operation of the generator and transmit a signal in fault-free operation of the generator, characterized in that it comprises means (7, 7 ', 7 ") arranged to, upon cessation of said means (5) for transmitting said signal test to regulate the function of another component (4, 9, 10) of the vehicle and the generator (3), this component having a function which may be controllable requires that said belt is not interrupted , and a device (6) designed to receive information from said means (5) and said means (7, 7 ', 7 ") and to determine that a breach of said belt exists if and only if it is determined by said means that said function of said component is not adjustable. 9. Anordning enligt krav 8, kannetecknad dal-ay, att namnda organ (7) ar utformade att testa att reglera funktionen hos namnda kylvatskepump (4).Device according to claim 8, characterized in that said means (7) are designed to test to regulate the function of said cooling water pump (4). 10. Anordning enligt krav 8, kannetecknad darav, att den är anordnad hos ett fordon som uppvisar en luftkonditioneringsanlaggning som drivs av ett hjul (9) drivet av namnda rem (1) att rotera, och att namnda organ (7') ar utformade att testa att reglera funktionen hos luftkonditioneringsanlaggningen.Device according to claim 8, characterized in that it is arranged in a vehicle which has an air conditioning system driven by a wheel (9) driven by said belt (1) to rotate, and that said means (7 ') are designed to try to regulate the function of the air conditioner. 11. Anordning enligt krav 8, kannetecknad darav, att den är utformad att anordnas i ett fordon med en kylflakt (10) driven av namnda rem (1), och att namnda organ (7") ar utformade att testa att reglera funktionen hos kylflakten och darvid kontrollera reglerbarheten genom att mata varvtalet hos kylflakten.Device according to claim 8, characterized in that it is designed to be arranged in a vehicle with a cooling surface (10) driven by said belt (1), and that said means (7 ") are designed to test to regulate the function of the cooling surface. and thereby checking the controllability by feeding the speed of the cooling surface. 12. Datorprogram som ar laddningsbart direkt till internminnet hos en dator, vilket datorprogram innefattar datorprogramkod for 14 537 27 bringande av datorn att styra stegen enligt nagot av kraven 1- 7 nar namnda datorprogram [Kars pa datorn.A computer program that is loadable directly into the internal memory of a computer, the computer program comprising computer program code for causing the computer to control the steps according to any of claims 1-7 when said computer program [Kars on the computer. 13. Datorprogramprodukt innefattande ett datalagringsmedium som är lasbart av en dator, varvid datorprogramkoden hos ett datorprogram enligt krav 12 är lagrat pa datalagringsmediet.A computer program product comprising a computer storage medium readable by a computer, the computer program code of a computer program according to claim 12 being stored on the data storage medium. 14. Elektronisk styrenhet for en anordning for detektering av brott pa en rem (1) som drivs av en forbranningsmotor (2) hos ett motorfordon och sjalv driver en generator (3) och en kyl- vatskepump (4) hos fordonet innefattande ett exekveringsmedel (12), ett till exekveringsmedlet anslutet minne (13) och ett till exekveringsmedlet anslutet datalagringsmedium (15), varvid datorprogramkoden hos ett datorprogram enligt krav 12 är lagrat pa namnda datalagringsmedium.Electronic control unit for a device for detecting breakage of a belt (1) driven by an internal combustion engine (2) of a motor vehicle and itself drives a generator (3) and a coolant pump (4) of the vehicle comprising an execution means ( 12), a memory (13) connected to the execution means and a data storage medium (15) connected to the execution means, the computer program code of a computer program according to claim 12 being stored on said data storage medium. 15. Motorfordon, kannetecknat darav, att det innefattar en anordning enligt nagot av kraven 8-11.Motor vehicle, characterized in that it comprises a device according to any one of claims 8-11. 16. Motorfordon enligt krav 15, kannetecknad darav, att det är ett hjulburet motorfordon, sasom en lastbil eller buss. 537 27Motor vehicle according to claim 15, characterized in that it is a wheeled motor vehicle, such as a truck or bus. 537 27
SE1350809A 2013-07-01 2013-07-01 Method and apparatus for detecting strap rupture on a strap arranged in a motor vehicle SE537275C2 (en)

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