SE1351244A1 - Cooling system in a vehicle - Google Patents
Cooling system in a vehicle Download PDFInfo
- Publication number
- SE1351244A1 SE1351244A1 SE1351244A SE1351244A SE1351244A1 SE 1351244 A1 SE1351244 A1 SE 1351244A1 SE 1351244 A SE1351244 A SE 1351244A SE 1351244 A SE1351244 A SE 1351244A SE 1351244 A1 SE1351244 A1 SE 1351244A1
- Authority
- SE
- Sweden
- Prior art keywords
- cooling
- coolant
- cooler
- thermostat
- combustion engine
- Prior art date
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 130
- 239000002826 coolant Substances 0.000 claims abstract description 110
- 238000002485 combustion reaction Methods 0.000 claims abstract description 80
- 239000000498 cooling water Substances 0.000 claims abstract description 42
- 239000000110 cooling liquid Substances 0.000 claims description 22
- 239000012809 cooling fluid Substances 0.000 claims description 9
- 229920004482 WACKER® Polymers 0.000 claims 1
- 239000003570 air Substances 0.000 description 22
- 239000007789 gas Substances 0.000 description 11
- 230000003134 recirculating effect Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- 239000012080 ambient air Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000012208 gear oil Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- 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
- F01P7/00—Controlling of coolant flow
- F01P7/14—Controlling of coolant flow the coolant being liquid
- F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
- F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
-
- 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
- F01P3/00—Liquid cooling
- F01P3/20—Cooling circuits not specific to a single part of engine or machine
-
- 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
- F01P3/00—Liquid cooling
- F01P3/02—Arrangements for cooling cylinders or cylinder heads
- F01P2003/027—Cooling cylinders and cylinder heads in parallel
-
- 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
- F01P3/00—Liquid cooling
- F01P3/18—Arrangements or mounting of liquid-to-air heat-exchangers
- F01P2003/182—Arrangements or mounting of liquid-to-air heat-exchangers with multiple heat-exchangers
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
Sammandrag Foreliggande uppfinning avser ett kylsystem i ett fordon, varvid kylsystetnet innefattar ett forsta ledningsparti (19) sorn innefattar en forsta kylare (19b) och en forsta termostat (15) som är anpassad att reglera flodet av kylvatska genom den forsta kylaren (19b), ett andra ledningsparti (20) som är anpassat aft leda kylvdtska till en forsta zon (la) av forbranningsmotorn, och ett treclje ledningsparti (21) som är anpassat att leda kylvatska till en andra zon (lb) av fOrbranningsmotom (1) i vilken andra zon det racier en lagre temperatur an i den forsta zonen (1a) under drift av forbranningsrnotorn (1). Det andra ledningspartiet (20) innefattar en andra kylare (20b) som har kapacilet att kyla kylvatskan till en lagre temperatur an i den forsta kylaren (19b) ()eh en andra termostat (16) som är anpassad att reglera flodet av kylvatska genom den andra kylaren (20b) Summary The present invention relates to a cooling system in a vehicle, the cooling system comprising a first conduit portion (19) comprising a first cooler (19b) and a first thermostat (15) adapted to regulate the flow of cooling water through the first the cooler (19b), a second conduit portion (20) adapted to conduct coolant to a first zone (1a) of the internal combustion engine, and a three-part conduit portion (21) adapted to direct coolant to a second zone (1b) of the internal combustion engine ( In which second zone it races a lower temperature than in the first zone (1a) during operation of combustion engine (1). The second conduit portion (20) includes a second cooler (20b) which has the capacity to cool the coolant to a lower temperature than in the first cooler (19b) () eh a second thermostat (16) adapted to regulate the flow of coolant through the second cooler (20b)
Description
Ky!system i ett fordon 5 UPPFINNINGENS BAKGRUND OCH RAND TEKNIK Foreliggande uppfinning avser ett kylsystem i ett fordon enligt patentkravets 1 ingress. Ky! System in a vehicle BACKGROUND OF THE INVENTION AND BACKGROUND ART The present invention relates to a cooling system in a vehicle according to the preamble of claim 1.
Under forbranningsprocesser i forbranningsmotors cylindrar skapas vdrmeenergi som varmer upp anslutande omraden i cylinderblock och cylinderhuvud. De omraden som är beldgna narmare forbranningsutrymmet erhaller i rcge an hogre temperatur an de omra.den som är belagna pa ett stone avstand frail forbranningsutrymmet. Det uppkommer darned varmare och kallare zoner i farbranningsmotorns cylinderblock och cylinderhuvud under drift av en forbranningsmotor. Vid drifts tillfallen da forbranningsmotom belastas hart under en langre period kan de varmare zonema av cylinderblocket och cylinderhuvudet erhalla en mycket hog temperatur. During combustion processes in the cylinders of the internal combustion engine, heat energy is created which heats the connecting areas in the cylinder block and cylinder head. The areas that is closer to the combustion chamber obtained at a higher temperature than the areas which are located at a stone distance from the combustion chamber. There are then warmer and colder zones in the cylinder block and cylinder head of the combustion engine during operation of an internal combustion engine. In the event of operation da the combustion engine is loaded hard for a long period of time, the warmer zones can be off the cylinder block and the cylinder head obtain a very high temperature.
Konventionella kylsystem far kylning av forbranningsmotorer cirkulerar kylvdtska som under normal drift kan ha en temperatur inom omradet 80-90°C. Da kylvatskan cirkulerar genom forbranningsmotorn kylkanaler tillhandahaller alla kylda zoner i forbranningsmotom en kylning rned kylvdtska av vdsentligen sa.mma temperatur. Vid driftstillfallen da en ferbranningsmotor belastas hart kan kylningen bli bristfallig i de varmaste zonerna av cylinderblocket och cylinderhuvudet. Conventional cooling systems for cooling internal combustion engines circulate cooling fluid which during normal operation can have a temperature in the range 80-90 ° C. Da cool water circulating through the internal combustion engine cooling ducts provide all cooled zones in the internal combustion engine a cooling rned coolant of essentially the same temperature. In the case of operation when a combustion engine is heavily loaded, the cooling may be deficient in the hottest zones of the cylinder block and the cylinder head.
DE 102011117102 visar ett kylsystem tried en cirkulerande kylvatska som kan kyla en forbranningsmotors vevhus och cylinderhuvud. Kylsystemet bestar av en hogtemperaturkylkrets och en lagtemperaturkylkrets. Kylvatska kan averforas mellan de tva kylkretsama med hjalp av ventiler. Kylvatskans temperatur i de respeldive kylkretsarna kan darmed varieras. Kylvatska frail lagtemperaturkylkretsen kan ledas genom ett nedre varmare avsnitt av forbranningsmotoms cylinderhuvud och kylvatska fran hogtemperaturkyikretsen kan ledas genom ett ovre kallare avsnitt av cylinderhuvudet. Darmed kan cylinderhuvudets neclre vanitare avsnitt kylas mcd kylvatska som har en lagre temperatur an den kylvdtska som kyler cylinderhuvudets avre kallare avsnitt. Detta kylsystem är komplicerat att styra och det innehaller bl.a. ventiler som är dyra att infOrskaffa. 2 SAMMANFATTNING AV UPPFINNINGEN Syftet med foreliggande uppfinning är att tillhandahalla ett kylsystem som har en okomplicerad styming och relativt fá koinponenter som kan inforskaffas till en relativt lag kostnad samtidigt som det är kapabelt att pa ett tillforlitligt salt kyla olika zoner en forbranningsmotor riled kylvatska av olika temperaturer. DE 102011117102 discloses a cooling system threaded by a circulating cooling vessel which can cool one internal combustion engine crankcase and cylinder head. The cooling system consists of a high-temperature cooling circuit and a low-temperature cooling circuit. Cooling fluid can be averaged between the two cooling circuits with the help of valves. The temperature of the cooling vessel in the respective cooling circuits can thus be varied. The cooling water from the low temperature cooling circuit can be led through a lower warmer section of the internal combustion engine cylinder head and coolant from the high temperature cooling circuit can be passed through an upper cooler section of the cylinder head. Thus, the lower vanitating section of the cylinder head can be cooled with a cooling liquid which has a lower temperature than the cooling liquid which cools the lower cooler section of the cylinder head. This cooling system is complicated to control and it contains i.a. valves that are expensive to procure. 2 SUMMARY OF THE INVENTION The object of the present invention is to provide a cooling system which has an uncomplicated control and relatively few components which can be procured at a relatively low cost while being able to reliably cool different zones on a reliable salt an internal combustion engine riled coolant of different temperatures.
Detta syfte uppnas med det inledningsvis definierade kylsystemet som kannetecknas av de sardrag som anges i patentkravets kanneteeknande del. Kylsystemet innefattar shledes ett forsta ledningsparti tried en kylare och en fOrsta termostat som reglerar tillforsel av kylvatska till kylaren i beroende av kylvatskans temperatur. Det forsta ledningspartiet har en motsvarande utformning som ett konventionellt kylsystem. Kylsysternet innefattar vidare ett andra ledningsparti som leder kylvatskan genom atminstorie en forsta zon av forbranningsmotom, och ett tredje ledningsparti som leder kylvatska genom en andra zon av forbranningsmotom som varms till en lagre temperatur an i den forsta zonen under drift av forbranningsmotorn. Det andra ledningspartiet innefattar en andra kylare som bar kapacitet att kyla kylvatskan till en lagre temperatur an i den forsta kylaren och en andra teimostat sorn reglerar tillfOrsel av kylvatska till den andra kylaren i beroende av kylvatskans temperatur. This object is achieved with the initially defined cooling system which can be characterized by the features stated in the characteristic part of the claim. The cooling system includes A first line of conductors is connected to a radiator and a first thermostat that regulates supply of coolant to the cooler depending on the temperature of the coolant. The first conduit portion has a similar design to a conventional cooling system. The cooling system further comprises a second conduit portion which directs the cooling liquid through atminstory a first zone of the internal combustion engine, and a third conduit portion which conducts coolant through a second zone of the internal combustion engine heated to a bearing temperature in the first zone during operation of the internal combustion engine. The second conduit portion comprises a second cooler which had the capacity to cool the coolant to a lower temperature than in the first cooler and a second thermostat which regulates the supply of coolant to the second cooler depending on the temperature of the coolant.
Kylvatskans temperatur i kylsystemet at relaterad till fOrbranningsmotoms temperatur. Da kylvatskan hat en lag temperatur i kylsystemet har aven forbranningsmotom en lag temperatur. Vid driftstillfallen da kylvatskans temperatur är lag liar fOrbranningsmotoms varmare forsta zon som har en temperatur av en acceptabel storlek. Den andra temmstaten at dirnensionerad sä den oppriar vid en kylvatsketemperatur som motsvarar en temperatur i den varmare fOrsta zonen av forbranningsmotorn cla extra kylning erfordras. Vid Adana driftstillfallen oppnar den andra termostaten och kylvatska leds genom den andra kylaren som saledes har kapacitet att kyla kylvatskan till en lagre temperatur an i den fOrsta kylaren. Darmed kan kylvatska med en lagre temperatur ledas till den forsta zonen av forbranningsmotom an den kylvatska sem leds till den andra zonen av forbranningsmotorn. I nth med det tillhandahalls en effektiviserad kylning av den forsta zonen av forbranningsmotom vilket sakerstaller att temperaturen i den forsta zonen inte stiger till en alltfor hog temperaturniva. 3 Enligt en utforingsfortn av foreliggande innefattar det andra ledningspartiet en bypassledning och att den andra termostaten är anpassad att leda kylvatskan forbi den andra kylaren via bypassledningen da kylvatskan har en lagre temperatur an den andra terrnostatens regleringstemperatur. En sadant andra ledningsparti kan ha en inloppsledning som leder kylvatskan till den andra kylaren och en utloppsledning som leder kylvatskan fran kylaren till forbranningsmotorn. Bypassledningen stracker sig detta fall mellan inloppsledningen och utloppsledningen. Den andra termostaten anordnas i inloppsledningen i anslutning till bypassledningen dar den altemativt leder kylvatskan genom bypassledningen eller genom kylaren i beroende av kylvatskans temperatur i det andra ledningspartiet. Coolant temperature in the cooling system at related to the temperature of the internal combustion engine. As the cooling water has a low temperature in the cooling system, the internal combustion engine also has a low temperature. In the case of operation when the temperature of the coolant is equal to the warmer first zone of the internal combustion engine which has a temperature of an acceptable size. The other temmstaten at dirnensionerad so it oppriar at one coolant temperature corresponding to a temperature in the warmer first zone of the internal combustion engine cla extra cooling is required. In the case of Adana operating cases, it opens the second thermostat and coolant are led through the second cooler, which thus has the capacity to cool the coolant to a lower temperature than in the first cooler. Darmed Coolant with a lower temperature can be led to the first zone of the internal combustion engine is the coolant which is led to the second zone of the internal combustion engine. In addition, more efficient cooling of the first zone of the internal combustion engine is provided, which ensures that the temperature in the first zone does not rise to an excessively high temperature level. 3 According to an embodiment of the present invention, the second conduit portion comprises a bypass line and that the second thermostat is adapted to lead the coolant past the second cooler via the bypass line as the coolant has a lower temperature than the control temperature of the second thermostat. Such a second management party may have one inlet line which leads the coolant to the other cooler and an outlet line which leads the coolant from the radiator to the internal combustion engine. The bypass line extends this case between the inlet line and the outlet line. The second thermostat is arranged in the inlet line adjacent to the bypass line where it alternatively leads the coolant through the bypass line or through the cooler depending on the coolant. temperature in the other pipe section.
Enligt en utfOringsfom] av foreliggande uppfinning mottar det andra ledningspartiet och det tredje ledningspartiet kylvatska i en ledning i kylsystemet sorn är belagen vasentligen omedelbart nedstrOms kylvatskepumpen. I denna ledning har kylvatskan ett maximalt ttyck och den befintliga kylvatskepumpen kan armed anvandas fOr att cirkulera kylvatska genom bade det andra ledningspartiet och det tredje ledningspartiet. According to an embodiment of the present invention, the second conduit portion and the third conduit portion receive cooling fluid in a conduit in the cooling system so that they are coated substantially immediately downstream of the cooling water pump. In this line has the coolant a maximum pressure and the existing coolant pump can be used to circulate cooling fluid through both the second conduit portion and the third conduit portion.
Enligt en ntforingsform av foreliggande uppfinning innefattar det andra ledningspartiet atminstone tva parallellt anordnade kylkanaler som stracker sig genom forsta zoner av forbranningsmotom. Forbranningsmotoms cylinder huvud och cylinderblock innefattar atminstone var sina varma forsta zoner vilka är belagna pa ett avstand fran varandra. Det är har lampligt att anordna en kylkanal genom de respektive forsta zonema for att en acceptabel kylning ska erhallas i de bade forsta zonema. According to an embodiment of the present invention, the second conduit portion comprises at least two parallel cooling channels extending through the first zones of combustion engine. The cylinder head and cylinder blocks of the internal combustion engine comprise at least each of their hot first zones which are spaced apart. It is appropriate to arrange a cooling channel through the respective first zones in order to obtain an acceptable cooling in the first two zones.
Enligt en utforingsform av foreliggande uppfinning innefattar det tredje ledningspartiet atminstone tva parallellt anordnade kylkanaler som stacker sig genom andra zoner av icirbranningsmotom. Forbranningsmotorns cylinder huvud och cylinderblock innefattar var sina andra zoner vilka är belagna pa ett avstand fran varandra. Det är aven i data fall lampligt att anordna en kylkanal genom de respektive pa avstand fran varandra belagna andra zonema fOr att en acceptabel kylning ska erhallas. According to an embodiment of the present invention, the third conduit portion comprises at least two cooling channels arranged in parallel which extend through other zones of the combustion engine. The cylinder head and cylinder blocks of the internal combustion engine each comprise their other zones which are located at a distance from each other. It is also in the data case appropriate to arrange a cooling duct through the respective at a distance from each other coated other zones in order to obtain an acceptable cooling.
Enligt en utfOringsform av fdreliggande uppfinning innefattar kylsystemet en tredje termostat som forhindrar att kylvatska leds via det tredje ledningspartiet till den andra zonen av fbrbranningsmotom da kylvatskan har en lagre temperatur an den tredje termostatens regleringstemperatur och tillater att kylvatska leds via det tredje 4 ledningspartiet till den andra zonen av forbranningsrnotorn da kylvatskan has en hOgre tenaperatur an den andra termostatens regleringstemperatur. I detta fall erhaller den kallare andra zonen ingen initial kylning efter en kallstart sa la.nge som kylvatskan har en lagre temperatur an den tredje termostatens regleringstemperatur. Mimed kan forbranningsmotom erhalla en snabbare uppvarmning efter en kallstart. Den tredje termostatens regleringstemperatur defmierar da det är lampfigt att borja kyla forbranningsmotorns kallare andra zoner. De forsta zonema kyls redan fran start av kylvdtska fran det andra ledningspartiet. According to an embodiment of the present invention, the cooling system comprises a third thermostat which prevents cooling liquid from being conducted via the third conduit portion to the second the zone of the internal combustion engine when the coolant has a lower temperature than the third the control temperature of the thermostat and allows cooling water to be led via the third 4 the line portion to the second zone of the combustion engine when the coolant has a higher temperature than the control temperature of the second thermostat. In this case, the colder second zone does not receive initial cooling after a cold start as long as the cooling liquid has a lower temperature than the control temperature of the third thermostat. Mimed can the internal combustion engine obtains a faster heating after a cold start. The third the control temperature of the thermostat defines as it is light-duty to start cooling the cooler other zones of the internal combustion engine. The first zones are cooled from the start by cooling water from the second line section.
Enligt en utfciringsform av foreliggande at termostaterna av den typ som innefattar en vaxkropp som andrar fas vid regleringstemperaturen. Vaxkroppen dndrar fas fran fast tillstand till flytande tillstand vid regleringstemperaturen. Vaxkroppens volym andras &armed vilket utnyttjas for att appna respektive stanga en ventil has termostaten. Sadana tennostater är mycket billiga att infOnskaffa samtidigt som de hat en mycket saker funktion. Atminstone en av termostatema kan ha en varierbar regleringstemperatur. Under vissa driftstillfallen kan det vara onslcvart att reglera tennostatemas appningstemperatur. Ovan namnda temaostat kan i delta fall fOrses med en elektrisk uppvarmningsenhet med vilken vaxkroppens regleringstemperatur kan van eras. According to an embodiment of the present invention, the thermostats of the type comprising a wax body that changes phase at the control temperature. The wax body changes phase from solid state to liquid state at the control temperature. The wax body's volume of others & armed which is used to open or rod a valve has the thermostat. Sadana tennostats are very cheap to obtain at the same time as they hate a lot things function. At least one of the thermostats can have a variable control temperature. During certain operating cases, it may be difficult to regulate the opening temperature of the tin states. The above-mentioned theme state can in some cases be provided with an electric heating unit with which the control temperature of the wax body can be adjusted.
Enligt en utforingsform av foreliggande uppfinning är innefattar kylsystemet ett fjarde ledningsparti dar kylvatskan utnyttjas for kylning av en komponent eller ett medium i fordonet. Kylsystem SOITikyler en farbra.nningsmotor utnyttjas aven med fordel for kylning av andra komponenter och tnedier i fordonet. Det flat-de ledningspartiet kan i detta fall innefatta en kylare sorn kyler ett medium. Kylaren kan vara en EGR-kylare for kylning av atercirkulerande avgaser, en laddluftkylare for kylning av laddluft, en kylare for kylning av motorolja, en kylare far kylning av vaxelladsolja etc. Kylvatskan kart avert anvandas for kylning av komponenter i fordonet sasom elektriska styrenheter. According to an embodiment of the present invention, the cooling system comprises a fourth conduit portion where the cooling liquid is used for cooling a component or a medium in the vehicle. Cooling system SOITikyler a color combustion engine is also used to advantage for cooling other components and parts in the vehicle. The flat wire portion can in This case includes a cooler that cools a medium. The radiator can be an EGR cooler for cooling recirculating exhaust gases, a charge air cooler for cooling charge air, a cooler for cooling engine oil, a cooler for cooling gear oil, etc. The cooling water card avert is used for cooling components in the vehicle such as electrical control units.
Enligt en utforingsfomi av foreliggande uppfinning innefattar naottar det fjarde ledningspartiet kylvatska fran en ledning i kylsystemet vilken är belagen vasentligen omedelbart nedstroms kylvatskepunipen. Darmed kan den befintliga kylvatskepumpen aven utnyttjas for att eirkulera kylvatska genom det fjarde ledningspartiet. Trite heller i detta fall erfordras flagon ytterligare kylvatskepurnp. According to an embodiment of the present invention, the fourth conduit portion comprises cooling water from a conduit in the cooling system which is coated substantially immediately downstream of the cooling water pipe. Thus, the existing coolant pump can also be used to circulate coolant through the fourth conduit portion. Trite rather in in this case, additional cooling water purge is required.
KORT BESKRIVN1NG AV RITNINGEN 1 det feljande beskrivs, sasom exempel, en faredragen utforingsform av uppfinningen med hanvisning till bifogade ritning, pa vilken: Fig. 1visar ett kylsystem i ett fordon enligt en utfciringsform av uppfinningen. 10 DETALJERAD BESKRTVN1NG AV EN FOREDRAGEN UTFOR1NGSFORM AV UPPFINNINGEN Fig. I visar en forbranningsmotor 1 som är anordnad i ett schematiskt visat fordon 2. Forbranningsmotom 1 kan vara en dies elmotor och fordonet ett tu.ngt fordon. BRIEF DESCRIPTION OF THE DRAWING The following describes, by way of example, a dangerous embodiment of the invention with reference to the accompanying drawing, in which: Fig. 1 shows a cooling system in a vehicle according to an embodiment of the invention. DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION Fig. 1 shows an internal combustion engine 1 which is arranged in a schematically shown vehicle 2. The internal combustion engine 1 can be a diesel electric motor and the vehicle a heavy vehicle.
Forbranningsmotom 1 innefattar en avgasledning 3 som är forsedd med en turbin 4 hos ett turboaggregat. En returledning 5 for atercirkulation av avgaser leder tillbaka en del av avgasema frail avgasledningen 3 till forbrdnningsmotorn I. Returleciningen 5 innefattar en EGR-ventil 7 med vilken avgasflOclet i returledningen 5 regleras och en EGR-kylare 6 far kylning av de atereirkulerande avgaserna. Fordonet 2 innefattar en luftledning 8 som leder I.uft till forbranningsmotorn 1. En kompressor 9 suger in och komprimerar luften i luftleclningen 8. Den komprimerade luften leds till en laddluftkylare 11 som är anordnad vid ett froraparti hos fordonet 2. En kylfldkt 10 suger en kylande luftstram av omgivande luft genom laddluftkylaren 11. Efter att laddluften har kylts i laddluftkylaren 11 blandas den med de atercirkulerande avgaser i returledningen 5 varefter blandningen leds till farbranningsmotoms cylindrar 12. The internal combustion engine 1 comprises an exhaust line 3 which is provided with a turbine 4 at a turbocharger. A return line 5 for exhaust gas recirculation returns a part of the exhaust gases from the exhaust line 3 to the internal combustion engine I. The return line 5 comprises an EGR valve 7 with which the exhaust gas flow in the return line 5 is regulated and an EGR cooler 6 cools the recirculating exhaust gases. Vehicle 2 comprises one air line 8 which leads I.uft to the internal combustion engine 1. A compressor 9 sucks in and compresses the air in the air cooler 8. The compressed air is led to a charge air cooler 11 which is arranged at a front portion of the vehicle 2. A cooling fluid 10 sucks a cooling air stream of ambient air through the charge air cooler 11. After the charge air has cooled in the charge air cooler 11 it is mixed recirculating exhaust gases in the return line 5, after which the mixture is led to the cylinders 12 of the combustion engine.
Forbranningsmotom 1 kyls av ett kylsystem med en cirkulerande kylvdtska. Kylvdtskan cirkuleras i kylsystemet med hjdlp av en kylvdtskepump 13. Kylvdtskepumpen 13 kan drivas pa konventionellt satt av forbranningsmotom 1 med en lamplig icke visad transmission. Kylsystemet innefattar en inloppsledning 13a som leder kylvdtska till kylvdtskepumpen 13 och en utloppsledning 13b som mottar kylvdtska fran kylvdtskepumpen 13. Kylsystemet innefattar en expansionstank 14 far pafyllning av kylvdtska i kylsystemet samt sakerstaller anskvart tryck i systemet nar kylvdtskan blir vaiin och expanderar. Expansionstanken 14 dr forbunden med kylvdtskepumpens inloppsledning 13a via en s.k, static line 14a. Darmed skapas ett erforderligt tryck i inloppsledningen 13a i anslutning till kylvdtskepumpens 13 sugsida 6 sa att kavitation forhindras. Kylsystemet innefattar en fersta termostat 15 som reglerar kylvatskeflodet genom ett forsta ledningsparti 19 hos kylsystemet, en andra termostat 16 som reglerar kylvatskeflodet genom ett andra ledningsparti 20 hos kylsystemet och en tredje termostat 17 som reglerar kylvatskeflodet genom ett tredje ledningsparti 21 hos kylsystemet. Teirnostatema är tried fordel av den typ som innehaller en vaxkropp som fasomvandlas vid regleringstemperaturen. Sadana termostater är mycket billiga att inferskaffa samtidigt som de har en rnyeket saker ftmktion. De kan aven forses med en elektrisk uppvarmningsenhet med vilken regleringstemperaturen kan regleras under olika Den fersta temrostaten 15 mottar kylvatska i en returledning 18 fran forbranningsmotom 1. Den forsta termostaten 15 appnar dâ kylvatskans temperatur i returledningen 18 overskrider den fersta terrnostatens 15 regleringstemperatur i. Nar kylvatskan i returledningen 18 har en lagre temperatur an den forsta regleringstemperaturen Ti sa, leder den kylvatskan till kylvatskepumpens inloppsledning 13a utan kylning När kylvatskan i returledningen 18 har en hogre temperatur an den fersta regleringstemperaturen Ti sá oppnar den fersta termostaten 15 och kylvatskan leds genom den forsta ledningskretsen 19, Den forsta ledningskretsen innefattar en inloppsledning 19a som mottar kylvatska frail returledningen 18 och leder den till en fersta kylare 19b som är anordnad vid fordonets frontparti i en position nedstrems laddluftkylaren 11 med avseende den kylande luftstrommens riktning genom laddluftkylaren 11. Kylvatskan i den fersta kylaren 19b kyls i detta fall av samma luftstrom som forsta passerat genom laddluftkylaren 11. Luften som strommar genom den fersta kylaren 19b har i och med det en hogre temperatur an den omgivande luften. Det fersta ledningspartiet 19 innefattar en utloppsledning 19c som leder kylvaskan fran den fersta kylaren 19b till kylvatskepumpens inloppsledning 13a. The internal combustion engine 1 is cooled by a cooling system with a circulating cooling box. The coolant is circulated in the cooling system by means of a coolant pump 13. The coolant pump 13 can be driven in a conventional manner by the internal combustion engine 1 with an appropriate transmission not shown. The cooling system comprises an inlet line 13a which leads the coolant to the coolant pump 13 and an outlet line 13b which receives coolant from the coolant pump 13. The cooling system comprises an expansion tank 14 for filling coolant in the cooling system as well as maintaining pressure in the system when the coolant becomes vain and expands. The expansion tank 14 dr associated with the inlet line 13a of the coolant pump via a so-called static line 14a. This creates a required pressure in the inlet line 13a in connection with the suction side of the coolant pump 13 6 said that cavitation is prevented. The cooling system comprises a first thermostat 15 which regulates the cooling water flow through a first conduit portion 19 of the cooling system, a second thermostat 16 which regulates the cooling water flow through a second conduit portion 20 of the cooling system and a third thermostat 17 which regulates the cooling water flow through a third conduit portion 21 in the cooling system. Teirnostatema are tried advantage of the type that contains a wax body which is phase converted at the control temperature. Such thermostats are very cheap to procure while at the same time they have a range of things to do. They can also be equipped with an electric heating unit with which the control temperature can be controlled during different The first thermostat 15 receives coolant in a return line 18 from the internal combustion engine 1. The first thermostat 15 opens when the temperature of the coolant in the return line 18 exceeds the control temperature of the first thermostat 15. When the coolant in the return line 18 has a lower temperature than the first the control temperature Ti said, it leads the coolant to the coolant pump Inlet line 13a without cooling When the cooling liquid in the return line 18 has a higher temperature than the first control temperature Ti, the first thermostat 15 opens and the cooling liquid is led through the first line circuit 19. The first line circuit comprises an inlet line 19a which receives the cooling water from the return line 18 and leads it to a first radiator 19b which is arranged at the front part of the vehicle in a position downstream of the charge air cooler 11 with respect to the direction of the cooling air stream through the charge air cooler 11. The cooling liquid in the first cooler 19b is cooled in this case by the same air flow as first passed through the charge air cooler 11. The air flowing through the first cooler 19b has a higher temperature. the ambient air. The first conduit portion 19 includes an outlet conduit 19c which leads the coolant from the first cooler 19b to the inlet line 13a of the coolant pump.
Den andra termostaten 16 är anordnad i ett andra ledningsparti 20. Det andra ledningspartiet 20 innefattar en inloppsledning 20a som mottar kylvatska frail kylvatskepumpens utloppsledning 13b. Inloppsledningen 20a at vid en motsatt ande ansluten till en andra kylare 20b. Den andra kylaren 20b är anordnad vid fordonets frontparti i en position i höjd med laddluftkylaren 11. Den kan alternativt vara anordnad framfer laddluftkylaren 11. Kylvatskan kyls aven i detta fall av en kylande luftstrorn sorn leds genom andra kylaren 20b med hjalp av kylflakten 10. Luften som leds genom den andra kylaren 20b har emellertid omgivningens temperatur och saledes en lagre temperatur an den luft som leds genom den fersta kylaren 19b. Det andra 7 ledningspartiet 20 innefattar en utloppsledning 20c som leder kylvatskan frail den andra kylaren 20b till tva parallellt anordnade kylkanaler 20d som stracker sig genom fOrsta zoner la av forbranningsmotom som erfordrar en mycket god kylning. De fOrsta zonema la utgor omraden av forbranningsmotorn cylinderblock och cylinderhuvud som erhaller en hog temperatur under drift. Den andra termostaten 16 är anordnad inloppsledningen 20a. Den andra termostaten har en andra regleringstemperatur T2. Nar kylvatskan i inloppsledningen 20a har en lagre temperatur an den andra regleringstemperaturen T2 sd leder den andra termostaten 16 kylv-atska, via en bypassledning 20e, fran inloppsledningen 20a till utloppsledningen 20c utan kylning i den andra kylaren 20b. Nar kylvthskan i inloppsledningen 20a har en hogre temperatur an den andra regleringstemperaturen T2 sã leder den andra termostaten 16 kylvatska till den andra kylaren 20b for kylning innan den leds vidare till kylkanalema 20d som stracker sig genorn fOrbra.nningsmotom 1. The second thermostat 16 is arranged in a second conduit portion 20. The second the conduit portion 20 includes an inlet conduit 20a which receives cooling water frail the coolant pump outlet line 13b. The inlet line 20a at at an opposite spirit connected to a second cooler 20b. The second cooler 20b is arranged at the front part of the vehicle in a position at the level of the charge air cooler 11. It may alternatively be arranged in front of the charge air cooler 11. The cooling liquid is also cooled in this case by a cooling air stream which is passed through the second cooler 20b. as passed through the second cooler 20b, however, has the ambient temperature and thus a lower temperature than the air passed through the first cooler 19b. The other 7 the conduit portion 20 includes an outlet conduit 20c which directs the coolant from the second cooler 20b to two parallel cooling channels 20d which extend through first zones 1a of the internal combustion engine which requires very good cooling. The first zones 1a form the areas of the internal combustion engine cylinder block and cylinder head which receives a high temperature during operation. The second thermostat 16 is provided inlet line 20a. The second thermostat has a second control temperature T2. When the cooling liquid in the inlet line 20a has a lower temperature than the second control temperature T2 sd, the second thermostat 16 conducts cooling liquid, via a bypass line 20e, from the inlet line 20a to the outlet line 20c without cooling in the second cooler 20b. When the cooling box in the inlet line 20a has a higher temperature at the second control temperature T2, the second thermostat 16 conducts cooling liquid to the second cooler 20b for cooling before it is passed on to the cooling channels 20d which extend through the combustion engine 1.
Det tredje ledningspartiet 21 innefattar en inloppsledning 21a som leder kylvatska frail kylvatskepumpens utloppsledning 13b till den tredje termostaten 21. Det tredje ledningspartict 21 innefattar tva parallella utloppsledningar 21b som leder kylvatska frail den tredje termostaten 17 dá den at oppen till tva parallellt anordnade kylkanaler 21c som stacker sig genom en respektive andra zon lb av ffirbranningsmotom. De andra zonema lb innefattar omraden av forbranningsmotorn cylinderblock och cylinderhuvud som inte erhaller samrna hoga temperatur under drift som i de forsta zonema la. Den tredje termostaten 17 avkanner kylvatskans temperatur i en kylvatskepumpens utloppsledning 13b. Den tredje termostaten 17 oppnar cid kylvatskan har en hogre temperatur en tredje regleringstemperatur T3. Kylsystemet innefattar aven en fjarde ledningskrets 22 som mottar kylvthska frail kylvatskepumpens utloppsledning 13b. ledningskretsen 22 innefattar en inloppsledning 22a som mottar kylvatska och leder den till EGR-kylaren 6. Den fjarde ledningskretsen 22 innefattar en returledning 22b som leder tillbaka kylvatska frail EGR-kylaren 6 till kylvatskepumpens inloppsledning 13a. The third conduit portion 21 includes an inlet conduit 21a which conducts cooling water frail the outlet line 13b of the cooling water pump to the third thermostat 21. The third line part 21 comprises two parallel outlet lines 21b which conduct coolant from the third thermostat 17 when it opens to two parallel arranged cooling channels 21c which extend through a respective second zone 1b of the combustion engine. The other zones 1b include the areas of the internal combustion engine cylinder blocks and cylinder heads which do not receive the same high temperature during operation as in the first zones 1a. The third thermostat 17 senses the temperature of the cooling water tank in the outlet line 13b of a cooling water pump. The third thermostat 17 opens cid the coolant has a higher temperature a third control temperature T3. The cooling system also includes a fourth lead circuit 22 which receives cooling velocities the coolant pump outlet line 13b. the line circuit 22 comprises an inlet line 22a which receives cooling water and leads it to the EGR cooler 6. The fourth line circuit 22 comprises a return line 22b which leads the cooling water from the EGR cooler 6 to the inlet line 13a of the cooling water pump.
Efter en kallstart av forbranningsmotorn 1 startar kylvatskepumpen 13 cirkulationen av kylvatska i kylsystemet. Kylvatskan har initialt omgivningens temperatur som vintertid kan vara mycket lag. Inloppsledningen 20a hos den andra ledningskretsen 20 mottar kontinuerligt kylvatska fran kylvthskepumpens utloppsledning 13b. Den andra termostaten 16 avkanner kylvatskans temperatur i inloppsledningen 20a. Kylvatskan har atminstone initialt en lagre temperatur an den andra termostatens 8 regleringstemperatur T2. Den andra termostaten 16 leder clamed kylvatskan, via bypassiedningen 20e, till utloppsledningen 20c utan kylning i den andra kylaren 20b. Kylvatskan leds darefter genom kylkanalema 20d som stacker sig genorn forbranningsmotorns fOrsta zoner la. Kylvatskan tillhandahaller en kylning av cylinderblock och cylinderhuvud i de fOrsta zonema. Efter att kylvatskan passerar genom fOrbranningsmotom 1 sarnlas den upp i returledningen 18 och leds mot den forsta termostaten 15 som styr kylvatskeflodet i del forsta ledningspartiet 19. Den tredje termostaten 17 avkanner kylvatskans temperatur i kylvatskepurnpens utloppsledning 13b. Kylvatskan har atrninstone initialt efter en kallstart en lagre temperatur an den tredje termostatens regleringstemperatur T3. Darmed forhindrar den tredje termostaten 17 att kylvatska leds genom kylkanalema 2 lb som stacker sig genom en de andra zonema lb av forbranningsmotorn. I detta skede sker saledes ingen kylning av de andra zonema lb av farbranningsmotorn 1. Darmed erhaller forbranningsmotom 1 en snabbare uppvannning. After a cold start of the internal combustion engine 1, the coolant pump 13 starts the circulation of coolant in the cooling system. The cooling water initially has the ambient temperature which in winter can be very low. The inlet line 20a of the second line circuit 20 continuously receives cooling liquid from the outlet line 13b of the coolant pump. The other one the thermostat 16 senses the temperature of the cooling water tank in the inlet line 20a. The cooling water has at least initially a lower temperature than that of the other thermostat 8 control temperature T2. The second thermostat 16 leads the clamed cooling liquid, via the bypass line 20e, to the outlet line 20c without cooling in the second cooler 20b. The coolant is then passed through the cooling channels 20d which stack through the first zones 1a of the internal combustion engine. The cooling fluid provides a cooling of cylinder blocks and cylinder heads in the first zones. After the coolant passes through the combustion engine 1 it is wound up in the return line 18 and led towards the first thermostat 15 which controls the cooling water flow in the part of the first line portion 19. The third thermostat 17 senses the temperature of the cooling water in the outlet line 13b of the cooling water purge. The cooling water has atrninstone initially after a cold start a storage temperature at the control temperature T3 of the third thermostat. Thus, it prevents the third thermostat 17 to cool water is led through the cooling channels 2 lb which protrude through one of the second zones 1b of the internal combustion engine. Thus, at this stage, no cooling of the other zones 1b of the combustion engine 1 takes place. Thus, the combustion engine 1 obtains a faster recovery.
Returledningen 18 mottar kylvatska som cirkulerat genom kylkanalerna 20d via den andra ledningskretsen 20. Den fOrsta termostaten 15 avkanner kylvatskans temperatur i returledningen 18. I detta skede har kylvatskan en klart lagre temperatur an den fOrsta tennostatens 15 regleringstemperatur Ti. Den forsta termostaten 15 leder darmed kylvatskan till kylvatskepumpens inloppsledning 13a utan kylning i den forsta kylaren 19b. Den fjarde ledningskretsen 22 mottar kontinuerligt kylvatska fran kylvatskepumpens utloppsledning 13b. Denna kylvatska leds till EGR-kylaren 6 dar den kyler det atercirkulerande avgaserna i returledningen 5. Kylvatskan leds darefter till kylvatskepumpens inloppsledning 13a for fornyad cirkulation i kylsystemet. Under ovan namnda initiala skede efter en kallstart tillfars kylvatskan vane fran fOrbranningsmotorns fOrsta zoner la och de atercirkulerande avgasema i EGR-kylaren 6. Kylvatskan tillhandahaller ingen kylning i varken den forsta kylaren 19b eller i den andra kylaren 20b. Kylvatskan i kylsystemet erhaller &armed en snabbt stigande temperatur. The return line 18 receives coolant circulating through the cooling channels 20d via the second line circuit 20. The first thermostat 15 senses the temperature of the coolant in the return line 18. At this stage the coolant has a clearly lower temperature than the control temperature Ti of the first tin state 15. The first thermostat 15 thus leads the coolant to the coolant pump inlet line 13a without cooling in the first cooler 19b. The fourth line circuit 22 continuously receives coolant from the outlet line 13b of the coolant pump. This coolant is led to the EGR cooler 6 where it cools the recirculating exhaust gases in the return line 5. The coolant is then led to the coolant pump inlet line 13a for renewed circulation in the cooling system. During the above-mentioned initial stage after a cold start is accustomed to the coolant from the first zones 1a of the internal combustion engine 1a and the recirculating exhaust gases in the EGR cooler 6. The coolant does not provide cooling in either the first cooler 19b or the second cooler 20b. The cooling fluid in the cooling system obtains & armed a rapidly rising temperature.
Relativt snart efter en kallstart nar kylvatskans temperatur den tredje tettuostatens 17 regleringstemperatur T3. Den tredje termostaten 17 oppnar och ett kylvatskeflode erhalls genom inloppsledningen 21a. Den tredje termostaten 17 leder nu kylvatskan, via de tva. utloppsledningama 21b, till de respektive kylkanalema 21c som stacker sig genom forbranningsmotoms andra zoner lb. Kylvatskan i den andra ledningskretsens inloppsledning 20a har dock fortfarande en lagre temperatur an den andra tennostatens 9 16 regleringstemperatur 12. Den andra termostaten leder saledes aven i data skede kylvdtska, via bypassledningen 20e, till utloppsledningen 20c utan kylning i den andra kylaren 20b. Kylvatskan leds darefter genom kylkanalerna 20d som stracker sig genom forbranningsmotoms forsta zoner la. Kylvdtskan som passerar genom forbranningsmotoms kylkanaler 20d, 21c samlas upp i returledningen 18 och leds mot den forsta termostaten 15. Den forsta termostaten 15 avkanner kylvatskans temp eratur i returledningen 18. Relatively soon after a cold start, the temperature of the coolant reaches the control temperature T3 of the third tettuostat 17. The third thermostat 17 opens and a cooling water flood is obtained through the inlet line 21a. The third thermostat 17 now leads the cooling water, via the two. the outlet lines 21b, to the respective cooling channels 21c which stack through the other zones of the internal combustion engine lb. The cooling fluid in the other circuit however, inlet line 20a still has a lower temperature than that of the other tin state 9 16 control temperature 12. The second thermostat thus also leads in the data stage cooling water, via the bypass line 20e, to the outlet line 20c without cooling in the second cooler 20b. The coolant is then passed through the cooling channels 20d which extend through the first zones 1a of the internal combustion engine. The cold that passes through the cooling ducts 20d, 21c of the internal combustion engine are collected in the return line 18 and led towards the first thermostat 15. The first thermostat 15 senses the temperature of the cooling water tank in the return line 18.
Aven i detta skede har kylvatskan en lagre temperatur an den forsta ternostatens regleringstemperatur T1. Den forsta termostaten 15 leder darrned kylvatskan till kylvatskepumpens inloppsledning 13a utan kylning i den forsta kylaren 19b. Kylvatskan eirkulation i den fiarde ledningskretsen 22 är oforandrad. Under detta skede tillkommer saledes en kylning av forbranningsmotoms andra zoner 1. Kylvatskan tillfors saledes varmeenergi fran forbranningsmotoms forsta la och andra zoner lb samt fran de atercirlculerande avgasema i EGR-kylaren 6. Kylvatskan tillhandahaller ingen kylning i kylsystemet och kylvatsketemperaturen fortsatter att stiga. Even at this stage, the coolant has a lower temperature than that of the first ternostat control temperature T1. The first thermostat 15 then leads the cooling liquid to the coolant pump inlet line 13a without cooling in the first cooler 19b. Coolant circulation in the fourth conductor circuit 22 is unchanged. During this stage, a cooling of the combustion engine's other zones 1 is added. The cooling liquid is thus supplied with heat energy from the combustion engine's first layer and other zones lb and from the recirculating exhaust gases in the EGR cooler 6. The cooling vessel provides no cooling in the cooling system and the coolant temperature continues to rise.
Under fortsatt drift av fordonet 2 varms kylvatskan sa smaningorn upp till en temperatur som är hogre an den fOrsta teiutostans 15 regleringstemperatur Ti. Den forsta termostaten 15 oppnar och leder kylvatska genom den forsta ledningskretsen 19. Kylvatskan leds, via inloppsledningen 19a, till kylaren 19b dar kylvatskan kyls av luft som forceras genom kylaren 19b med hjdlp av kylflakten 10 och fordonets fartvind. Kylvatskan leds darefter, via utloppsledningen I 9e, till kylvatskepumpens inloppsledning 13a for fornyad eirkulation i kylsysternet. I detta skede tillhandahaller kylvatskan saledes en kylning i kylaren 19. Kylarens 19 uppgift att kyla kylvatskan sá att den med hjalp av den forsta termostaten 15 kan ge kylvatskan en stabil drifttemperatur vid vilken forbranningsrnotom 1 erhaller optimala egenskaper. Den kyleffekt som kylvatskan erhaller i kylaren motsvarar har vasentligen den varmeeffekt som kylvdtskan tillfors da den varms av forbranningsmotorn och de atercirkulerande avgaserna i EGR-kylaren 6. During continued operation of the vehicle 2, the coolant is heated, said the smaningorn up to one temperature which is higher than the control temperature Ti of the first teiutostan 15. The the first thermostat 15 opens and leads coolant through the first line circuit 19. The coolant is led, via the inlet line 19a, to the cooler 19b where the coolant is cooled by air forced through the cooler 19b by means of the cooling surface 10 and the vehicle wind speed. The coolant is then led, via the outlet line I 9e, to the coolant pump inlet line 13a for renewed circulation in the cooling system. At this stage provides the coolant thus a cooling in the cooler 19. The function of the cooler 19 is to cool the coolant so that with the aid of the first thermostat 15 it can give the coolant a stable operating temperature at which the combustion engine 1 obtains optimum properties. The cooling effect that the cooling liquid receives in the cooler corresponds to essentially has the heating effect which the coolant is supplied when it is heated by the internal combustion engine and the recirculating ones the exhaust gases in the EGR radiator 6.
Forbranningsmotorns belastning varierar dock under drift och clamed den varmeeffekt som ska kylas bort i den forsta kylaren 19b. Vid driftstillfallen di forbranningsmotom 1 belastas hart bar den fOrsta kylaren 19b inte alltid kapacitet att kyla bort den varmeeffekt som kylvatskan upptar da den kyler forbranningsmotom 1 och de atercirkulerande avgaserna i EGR-kylaren 6. Det resulterar i att kylvatskans temperatur returledningen 18 stiger till en hogre niva. an den forsta termostatens regleringstemperatur Ti. Da den fOrsta kylaren 19b jute hat- kapacitet att halla kvar kylvatskans temperatur ph den onskade drifttemperaturen sa oppnar den andra tennostaten 16. Den andra termostaten 16 liar en regleringstemperatur T3 som definierar nar kylvatskans temperatur efter kylningen i den forsta kylaren 19b är far hog. D. detta intraffar leder den andra temiostaten 16 kylvatska i det andra ledningspartiet 20 till den andra kylaren 20b. Mimed leds kylvatska som redan kylts i den forsta kylaren 19b kyls i den andra kylaren 20b I ett andra steg av tuft med omgivningens temperatur. Den kan armed erhalla en lagre temperatur an kylvatskan som leds genom den tredje ledningskretsen 21 och genom forbranningstnotorns andra zoner 1. Denna relativt kalla kylvatska leds fran den andra kylaren 20b, via utloppsledningen 20c, till kylkanalema 20d sorn stracker sig genom forbranningsmotoms forsta zoner la. De forsta zonema tillhandahaller darmed en effektiv kylning. Under detta skede sker kyls saledes all kylvatska i den forsta kylaren 19b. Den del av kylvdtskan som leds genom det andra ledningspartiet crhaller aven en kylning i ett andra steg i den andra kylaren 20b till an lagre temperatur an den kylvdtska som enbart kylts i den forsta kylaren 19b, D. aven den andra kylaren 20b anvands for kylning av kylvatska tillhandahaller kylsystemet en Rad kylkapacitet. However, the load of the internal combustion engine varies during operation and clamed the heat output to be cooled in the first radiator 19b. In the event of an operation in your internal combustion engine 1 is loaded hard, the first cooler 19b did not always have the capacity to cool it off heat effect that the coolant absorbs when it cools the internal combustion engine 1 and they recirculating the exhaust gases in the EGR cooler 6. As a result, the coolant temperature of the return line 18 rises to a higher level. at the control temperature Ti of the first thermostat. Since the first radiator 19b has the capacity to maintain the temperature of the coolant at the desired operating temperature, the second opens the tennostaten 16. The second thermostat 16 liar a control temperature T3 as defines when the temperature of the coolant after cooling in the first cooler 19b is too high. D. this occurs, the second thermostat 16 leads coolant in the second conduit portion 20 to the second cooler 20b. Mimed leads coolant already cooled in the first cooler 19b is cooled in the second cooler 20b In a second stage of tuft with ambient temperature. It can be armed to maintain a lower temperature than the cooling water which is led through the third line circuit 21 and through the second zones 1 of the combustion notor. This relatively cold cooling vessel is led from the second cooler 20b, via the outlet line 20c, to the cooling channels 20d which extend through the first zones 1a 1a of the combustion engine. The first zones thus provide one efficient cooling. During this stage, all the cooling liquid in the first cooler is thus cooled 19b. The part of the coolant which is passed through the second conduit portion also contains a cooling in a second stage in the second cooler 20b to a lower temperature than the coolant which is only cooled in the first cooler 19b, D. also the second cooler 20b is used for cooling of cooling water provides the cooling system with a range of cooling capacity.
Samtidigt kan den extra tillfOrda kyleffekten tillforas till de omraden dar kylningen bast behovs namligen i de varma forsta zonema la av forbranningsmotorn 1. Risken att temperaturen i de forsta zonerna la av forbranningsmotom I blir alltfer hog om forbranningsmotorn 1 belastas mycket hart under en langre period at clamed vasentligen eliminerad. En ytterligare fordel med kylsystemet at att det endast erfordras en kylvatskepump for att cirkulera kylvatskan i alla ledningspartier 19, 20, 21, 22 hos kylsystemet. Detta kan goras genom att den andra ledningskretsen 20, den tredje ledningskretsen 21 och den fiat-de ledningskretsen 22 mottar kylvatska frau kylvatskepurnpens utloppsledning 13b I parallellt anordnade inloppsledningar 20a, 21a, 22a. En ytterligare fordel med kylsystemet ar att det har en myeket enkel styrning. At the same time, the extra supplied cooling effect can be applied to the areas where the cooling Namely, in the hot first zones 1a of the internal combustion engine 1 is required the risk that the temperature in the first zones 1a of the internal combustion engine I becomes too high if the internal combustion engine 1 is loaded very hard for a long period that clamed is substantially eliminated. An additional advantage of the cooling system is that it only a coolant pump is required to circulate the coolant in all conduit portions 19, 20, 21, 22 of the cooling system. This can be done by the second line circuit 20, the third line circuit 21 and the floating line circuit 22 receiving cooling water from the outlet line 13b of the cooling water pump in I inlet lines 20a, 21a, 22a arranged in parallel. An additional advantage of the cooling system is that it has a very simple control.
Termostatema 15, 16 och 17 tillhandahaller en enkel och effektiv styming av kylsystemet. Termostater är komponenter som kan inforskaffas till en myeket lag kostnad. The thermostats 15, 16 and 17 provide a simple and efficient control of the cooling system. Thermostats are components that can be purchased at a very low cost.
Uppfinningen at pa intet satt begransad till den utforingsfomi som beskrivs pa ritningen utan kan varieras fritt inom patentkravens ramar. 11 The invention is in no way limited to the embodiment described herein the drawing but can be varied freely within the scope of the claims. 11
Claims (11)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1351244A SE538343C2 (en) | 2013-10-18 | 2013-10-18 | Cooling system in a vehicle |
| DE112014004338.9T DE112014004338B4 (en) | 2013-10-18 | 2014-09-26 | cooling system in a vehicle |
| PCT/SE2014/051110 WO2015057129A1 (en) | 2013-10-18 | 2014-09-26 | Cooling system in a vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1351244A SE538343C2 (en) | 2013-10-18 | 2013-10-18 | Cooling system in a vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE1351244A1 true SE1351244A1 (en) | 2015-04-19 |
| SE538343C2 SE538343C2 (en) | 2016-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE1351244A SE538343C2 (en) | 2013-10-18 | 2013-10-18 | Cooling system in a vehicle |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE112014004338B4 (en) |
| SE (1) | SE538343C2 (en) |
| WO (1) | WO2015057129A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106640329A (en) * | 2015-09-06 | 2017-05-10 | 北汽福田汽车股份有限公司 | Automobile and engine cooling system thereof |
| SE539919C2 (en) * | 2016-05-19 | 2018-01-16 | Scania Cv Ab | A cooling system for a combustion engine and a further object |
| SE541554C2 (en) | 2017-01-26 | 2019-10-29 | Scania Cv Ab | A cooling system for cooling of objects with coolant at three different temperatures and a vehicle comprising such a system |
| CN109268120A (en) * | 2018-08-22 | 2019-01-25 | 浙江吉利控股集团有限公司 | A kind of cooling system of engine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07101006B2 (en) | 1987-02-06 | 1995-11-01 | マツダ株式会社 | Water-cooled engine cooling system |
| DE10134678A1 (en) * | 2001-07-20 | 2003-02-06 | Bosch Gmbh Robert | Arrangement for cooling and heating motor vehicle, has at least one bypass line with bypass valve associated with and arranged in parallel with at least one auxiliary radiator segment |
| DE10332949A1 (en) * | 2003-07-19 | 2005-02-10 | Daimlerchrysler Ag | Device for cooling and preheating |
| FR2951778B1 (en) * | 2009-10-27 | 2012-07-20 | Peugeot Citroen Automobiles Sa | DEVICE AND METHOD FOR COOLING, VEHICLE EQUIPPED WITH SAID DEVICE |
| DE102011101337A1 (en) * | 2011-05-12 | 2011-12-01 | Daimler Ag | Circuit arrangement for refrigeration of auxiliary unit of internal combustion engine of hybrid vehicle e.g. motor car, has low-temperature circuit linked with high-temperature circuit, so that coolant is passed via high-temperature circuit |
| DE102011117102A1 (en) * | 2011-10-27 | 2012-05-31 | Daimler Ag | Circuit arrangement for cooling e.g. electrical motor in diesel engine of hybrid vehicle, has low-temperature circuit opening at outlet of cylinder head or into high-temperature circuit in flow direction |
-
2013
- 2013-10-18 SE SE1351244A patent/SE538343C2/en unknown
-
2014
- 2014-09-26 DE DE112014004338.9T patent/DE112014004338B4/en active Active
- 2014-09-26 WO PCT/SE2014/051110 patent/WO2015057129A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| DE112014004338B4 (en) | 2024-10-02 |
| DE112014004338T5 (en) | 2016-06-02 |
| SE538343C2 (en) | 2016-05-24 |
| WO2015057129A1 (en) | 2015-04-23 |
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