• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A cooling system for a motor vehicle comprises a cooling circuit (2) for cooling an internal combustion engine (3) and a hydrodynamic retarder (4) by means of a cooling liquid flowing in the cooling circuit. The retarder (4) is designed to use coolant flowing in the cooling circuit as a braking medium. A coolant cooler (6) for cooling the coolant is connected in the cooling circuit. A thermostat device comprises a first thermostat means (16) arranged to regulate the flow of coolant to the coolant cooler and to a line (14) past it depending on the temperature of coolant which is led into this thermostat means via a pilot line (17). A second thermostat means (18) is arranged to regulate the flow of coolant to the coolant cooler (6) and to a line past it in dependence on the temperature of the coolant arriving therefrom from the retarder. The second thermostat means is designed to open for flow to the coolant cooler at a second temperature which is at least 5 K higher than a first temperature from which the first thermostat means opens for the corresponding flow. (Fig. 1).
    公开号:SE1251433A1
    申请号:SE1251433
    申请日:2012-12-17
    公开日:2014-06-18
    发明作者:Zoltan Kardos；Ola Hall
    申请人:Scania Cv Ab；
    IPC主号:
    专利说明:

    1015202530fed to the internal combustion engine or directly back to the internal combustionthe engine without passage through the radiator.
    In a cooling system of an initially defined type, where in the cooling circuitthen flowing coolant replaces the oil as a braking mediumin the retarder, the retarder also becomes fast in the sense of the effectwhich during retarder braking is transferred to the coolant becomes significanthigher than in the case of an oil circuit, even if the amount of heat thattransferred to the coolant becomes the same in both cases. Consequentlygen there are two parts here, retarder and coolant cooler, which isfast in the cooling circuit and for which a short feedback time to onethermostat device is needed to keep temperature fluctuations downthe coolants and thus the stresses on the cooling circuitcomponents, in particular cooling elements in the coolantlaren. However, retarders and coolant coolers are usually locatedin completely different places in the coolant system, which makes it difficult toplacement of a thermostat device in such a cooling systemstem.
    SUMMARY OF THE INVENTIONThe object of the present invention is to provide a cooling systemsystem for a motor vehicle of an initially defined type throughwhich achieves an advantageous function in terms of speed andappropriate to the power transferred to the coolant bothin the coolant cooler and in the retarder.
    This object is achieved according to the invention bysystem of an initially defined type, arrange a thermostat devicecomprising a second thermostat means arranged to receive10152025coolant in the first line from the retarder and regulatethe flow of coolant to the coolant cooler and to said thirdline depending on the temperature of the received coolantcan, and design the second thermostat means to open for flowof coolant arriving in the cooling circuit therewith further to the coolantthe cooler from a second temperature of at least 5 Khigher than a first temperature of in said pilot line to itfirst thermostat means arriving coolant from whichThis first thermostat means is designed to open for flow ofin the first line of the refrigeration circuit from the retarderliquid on to the coolant cooler.
    This means that during normal driving of the motor vehicle, ie. in itin no case of braking with the intervention of the hydrodynamicthe retarder occurs, then only the thermostat device willthermostat means to control the temperature of the coolant,as the temperature of it arriving at the other thermostat meansthe coolant by passing the internal combustion engine does notwill be able to reach said second temperature and thereforewith the other thermostat means will always be in oneposition when this does not lead any coolant on to the coolant coolantclean. With sufficiently strong retarder braking, however,the temperature of the coolant arriving at the second thermo-the state organ from the retarder to have been raised to a temperature abovesaid second temperature, so that the second thermostat means thenopens for flow of coolant on to the coolant cooler. Therebythe reaction to the retarder braking of the thermostat devicethanks to the arrangement of the other thermostat means thatbe very fast. Accordingly, with the invention1015202530gave the cooling system a good regulation of the coolant flow with cardsresponse time in terms of both retarder power and coolant cooler power.
    According to an embodiment of the invention, the second thermostatganet designed to open for the flow of coolant to the radiator fromand with a second temperature which is 5 - 20 K, 5 - 15 K, 8 - 15 Kor 8 - 12 K higher than said first temperature. It has shownthat in many cases there is a difference between said second temperatureturn and said first temperature of about 10 K fitting, thenthis is enough to ensure that in normal driving withoutretarder braking the temperature of the to the second thermostatthe body arriving at the coolant via the passage of the combustiontower should not have been able to reach said second temperature, becausethe temperature increase of the coolant through the passage ofthe internal combustion engine is normally a maximum of about 10 K. In some typesof engines and cooling systems, this maximum temperature increasemay be lower and then a smaller difference betweensta and other temperature are accepted.
    According to another embodiment of the invention, said firsttemperature 70 - 90 ° C or 75 - 85 ° C. This is an appropriate temperatureat which coolant in the cooling circuit of a cooling system thereoftype should begin to be passed through a coolant cooler for heat dissipationto this.
    According to another embodiment of the invention, said two arethermostat means arranged in one and the same thermostat housing ashas a common inlet channel for thermostatic means which isvia a first conduit portion of the first conduit connected toan outlet of the retarder, and the thermostat housing has at least1015202530a first outlet duct connected via a second conduit portion ofthe first line with the coolant inlet of the coolant cooler anda second outlet duct connected to said third conduit.
    This gives the thermostat device a single physical position,but still it gets the two positions in terms of regulationthen the power-efficient parts (retarder and coolant) are requiredcoolers) are located in different places in the cooling system. By collectingthe two thermostat means in a single thermostat housing are simplifiedthe thermostat device and knows its space requirementskept at a low level. In this case, it is advantageous to have the thermostat housinga single first outlet duct common to the two thermostatswhich has a favorable effect on the space requirements of the thermalthe state device receives.
    According to another embodiment of the invention, saidsecond thermostat means a valve body which is displaceable betweendifferent positions for regulating the flow of coolant from saidtarder to the coolant cooler and to said third line, atemperature-dependent activating element and a displaceable partdesigned to carry the valve body with them when displaced,the activating element is arranged to influence the displacement positionof said part and thus the valve body depending on the temperaturethe temperature of the coolant received from the retarder, the valvethe body has a valve member in the form of a first plate elementwhich is designed to be in a first end position of the valve body inabutment against a second plate element which forms a valve seatbetween an inlet of the second thermostat means from the retarder andan outlet to the coolant cooler to through this bearingprevent coolant from flowing through this thermostat means tothe coolant cooler, and the first plate element is arranged below1015202530effect of the activating element slidably away from saidabutment against the second plate element to open a connectionbetween the inlet of the other thermostat means and the outlet tothe coolant cooler.
    According to another embodiment of the invention, the formerthe thermostat means a valve body which is displaceable betweenpositions for regulating the flow of coolant from said retarderto the coolant cooler and to said third line, a temperatureturn-dependent activating elements and a slidable part designedto displace the valve body when displacing it, the actuatingthe element is arranged to influence the displacement position of saidpart and thus the valve body depending on the temperature ofthe coolant received via the pilot line, the valve bodyhas a valve member in the form of a first plate element which isdesigned to be in abutment in a first end position of the valve bodyagainst a second plate element which forms a valve seat betweenan inlet in the first thermostat means from the retarder and an outletrace against the coolant cooler to prevent through this bearingcoolant to flow through this thermostat means to the coolantthe radiator, and the first plate element is arranged under the actionof the activating element slidably away from said abutmentagainst the second plate member to open a connection betweenthe inlet of the first thermostat means and the outlet for the coolant coolinglaren.
    According to another embodiment of the invention, said comprisesvalve body a second valve member which is in a second end position ofthe valve body receptively in a valve seat to thereby preventfrom the retarder to the thermostat means in question arriving cooling1015202530liquid to flow to said third conduit. Hereby can atneed for strong cooling of the coolant, especially in case of heavybraking, it is prevented that the thermo-state means arriving coolant of this thermostat meansforward to the coolant inlet of the internal combustion engine withoutthrough the coolant cooler.
    According to another embodiment of the invention, the valve body isdisplaceable from said first end position in the direction away therefromthe action of the actuating element and against the action of the spring forceof a spring member acting on the valve body. In doing so,advantageously the activating element takes a wax body.
    The invention also relates to a motor vehicle according to the corresponding appendix.appended claims.Other advantages and advantageous features of the inventionappears from the following description.
    BRIEF DESCRIPTION OF THE DRAWINGSThe invention will be described in more detail belowusing exemplary embodiments with referenceto the accompanying drawings, in which:Fig. 1 is a simplified schematic diagram illustrating a cooling systemaccording to an embodiment of the invention,Fig. 2 is a simplified, partially cut-away view of a possible thermostatarrangement of the cooling system in Fig. 1,10152025Fig. 3 is a Fig. 2 corresponding view of an alternative design ofthe thermostat device, andFig. 4 is a principle diagram corresponding to Fig. 1 illustrating a coolingsystem according to a second embodiment of the invention.
    DETAILED DESCRIPTION OF EMBODIMENTS OFTHE INVENTIONFig. 1 very schematically illustrates one for a motor vehicleseen cooling system 1 according to the present invention. This cooling systemcomprises a cooling circuit 2 for cooling an internal combustion engine 3 ofthe vehicle and a hydrodynamic retarder 4 arranged to exercisebraking action on a driving axle of the motor vehicle by means of an ithe cooling circuit flowing coolant, preferably in the form of waterwith any freezing point reducing additives such asvis glycol. The retarder 4 is located in the cooling circuit 2 directlycurrent about the internal combustion engine 3. A coolant pump 5 is connectedload in the cooling circuit to circulate the coolant in the cooling circuit. Furtheris a coolant cooler 6 connected in the cooling circuit for cooling the coolingthe liquid. The coolant cooler 6 comprises a coolant inlet 7 viaretarder 4 connected to a coolant outlet 8 of the combustionvia a first line 9 of the cooling circuit. Coolant coolantThe valve 6 further has a coolant outlet 10 which is connectedwith a coolant inlet 11 of the internal combustion engine 3 via asecond line 12 of the cooling circuit. The first line 9 is in onepoint 13 between the retarder and the coolant cooler connected tothe second line 12 via a third line 14 of the cooling circuit1015202530to allow the return of coolant from the retarder through itto the internal combustion engine without passage through the coolant cooler.
    A thermostat device 15 (see now also Fig. 2) has a firstthermostat means 16 arranged to regulate the flow of coolant tothe coolant cooler 6 and to the third line 14 depending onthe temperature of coolant conducted into the thermostat means froma pilot line 17 included in the cooling circuit, which at itscurrent end is connected to said second line 12.
    The thermostat device further has a second thermostat member18 arranged to receive coolant in the first line 9 fromretarder 4 and regulate the flow of coolant to the coolant cooler 6and to said third line 14 depending on the temperature ofthe received coolant.
    The two thermostat means are arranged in one and the same thermostat.State house 19 which has a common feature of the thermostat meanschannel 20 which is via a first conduit portion 21 of theline 9 connected to an outlet 22 of the retarder. Thermalthe State House further has a first outlet channel 23 connected viaa second conduit portion 24 of the first conduit 9 with coolingthe coolant inlet 7 of the liquid cooler and two other outlet ducts25, 26 connected to said third line 14. The first ter-the mustat means 16 has a valve body 27, which is displacedbar in the thermostat housing 19 between different positions for regulating the flowof coolant from said retarder via the inlet duct 20 to itthe first outlet duct 23 and thus to the coolant cooler and tosaid third line 14. The thermostat means has a temperaturetemperature-dependent activating element 28 which comprises a wax body10152025301029 arranged to be struck by the coolant flow in the pilot line 17 anda displaceable part 30 arranged to guide upon displacement thereofwith it the valve body. The activating element is arranged toact the displacement position of the part 30 and thus the valve body independing on the temperature of coolant received via the pilotthe cord.
    The valve body 27 has a valve member 31 in the form of a firstplate element which is designed so that in a first end position of the valvethe body be in abutment with a second plate element 32 whicha valve seat between an inlet of the first thermostat meansconnected to the inlet duct 20 and an outlet connected tothe first outlet channel 23 to pass through this abutmentprevent coolant from flowing through this thermostat means to the coolantthe liquid cooler. The first plate element 31 is arranged below theeffect of the activating element slidably away from said device.lying against the second plate member 32 to open a connectionbetween the inlet of the first thermostat means and the outlet tothe coolant cooler from an initial temperature of in the pilotline 17 to the wax body 29 arriving coolant. Thisinitial temperature is suitably about + 80 ° C. Valve body 27also has a second valve member 33 as in a second end positionof the valve body is receivable in a second valve seat 34 forthereby obstructing from the retarder via the inlet passage 20 to itfirst thermostat means arriving coolant to flow tothe third line 14.
    The second thermostat member 18 is designed in a manner similar tothe first in the case of valve body 35 with valve means in the form ofplate element 36 which is designed to be in a first end position of101520253011the valve body be in abutment against a second plate element 37forming a valve seat between an inlet of the second thermocouplethe state means connected to the inlet duct 20 and an outlet forconnected to the first outlet duct 23. The second thermostatthe means has an activating element 38 arranged to actthe displacement position of the first plate member 36 depending onthe temperature of the coolant received from the retarder viathe inlet channel 20 and for this purpose has a wax body 39arranged to be struck by this coolant. In doing so, the activationthe element 38 of the second thermostat means 18 designed to viaa displaceable member 42 removes the first plate member 36from the abutment against the second plate member 37 to openfor flow of coolant arriving in the cooling circuit tothe coolant cooler from a second temperature which isat least 5 K higher than said first temperature. Preferablythis second temperature is about 10 K higher than the first temperatureraturen.The second thermostat means also has a second valve means40 which in a second end position of the valve body 35 is receptive ina second valve seat 41 to thereby prevent from the retarder viathe inlet duct 20 to the second thermostat means arrivingcoolant to flow to the third line 14. The valve bodyThe two thermostat means are affected by the spring forceof spring means 43, 44 against the position which blocks flow ofcoolant to the coolant cooler 6.
    The function of the just described coolant system is as follows.
    During normal operation, both thermostat means will closerespective connection between the inlet duct 20 and the outlet duct10152025301223 against the coolant cooler as long as the temperature ofthe coolant arriving at the first thermostat means 16 in the pilotline 17 is below said first temperature. This meansthat the coolant will flow from the thermostat device viathe third line 14 to the coolant inlet of the internal combustion engine 10When the internal combustion engine has heated the coolant in the cooling circuitso much so that in the pilot line 17 to the wax body 29the landing coolant has a temperature exceeding saidfirst temperature, e.g. + 80 ° C, then the first thermostat-means 16 to open for flow of via the inlet duct 20 arrivingcooling liquid further to the outlet duct 23 and thus coolingthe liquid cooler. At the same time, some of the coolant will bevia the third line 14 directly to the internal combustion engine 3without going through the coolant cooler 6. The higher the temperatureof the coolant of the pilot line 17 becomes, the larger it becomespart of it to the thermostat device via the inlet duct 20landing coolant which will be passed on to the coolantthe cooler. This, of course, acts in the temperature-lowering directionon the coolant in the pilot line, and this regulation willmake sure that the temperature of the coolant in the pilot line comesto be kept close to said first temperature, preferably to a maximumoscillate between being 5 K below and above this temperature. INin any case, this brings the temperature of the thermostat tothe device via the inlet duct 20 arriving the coolant does notto reach said second temperature as long as not the vehiclebraked using the retarder 4.
    However, with relatively strong retarder braking will occurthe temperature of the coolant flowing from the retarder torapidly increase considerably and exceed said second temperature, so101520253013that the second thermostat means then directly opens a connectionbetween the inlet duct 20 and the outlet duct 23 for conductingcoolant to the coolant cooler 6.
    Fig. 3 illustrates an alternative design of one in a cooling circuitaccording to Fig. 1 arranged thermostat device, which differs fromthe one according to Fig. 2 in that the second thermostat member 2 does nothas some second valve means and here only an outlet duct26 to the third line 14 is present. Otherwise, the function ofthis thermostat device the same as that of the according toFig. 2.
    Fig. 4 illustrates a cooling system according to a second embodiment ofthe invention, which differs from that shown in Fig. 1 in thathere the two thermostat means 16 "and 18" respectively are separated fromeach other, i.e. not arranged in the same thermostat housing, butIn terms of communication, these thermostat devices work together onin the same way as the thermostat devices according to Figs. 2 and 3. Howeverit would usually be an advantage to arrange the two thermostatsnext to each other in one and the same thermostat housing. The differentthe components of this cooling system have the same referencedrawings as corresponding components of the system according toFig. 1 with the addition "_The invention is of course not in any way limited to those abovedescribed embodiments, without a variety of possibilities for modi-fications thereof should be apparent to one skilled in the artwithout departing from the scope of the invention for the sake ofas defined in the appended claims.14For example, the two thermostat means may very well change placesso that the first thermostat means is physically arranged in the cooling circuitslightly closer to the retarder than the other thermostat means.
    权利要求:
    Claims (10)
    [1]
    1. 15
    [2]
    Patent claims
    [3]
    Cooling system for a motor vehicle comprising: o a cooling circuit (2) for cooling an internal combustion engine (3) and a hydrodynamic retarder (4), which is arranged to exert a braking action on a driving shaft of the motor vehicle, by means of a coolant flowing in the cooling circuit, a coolant pump (5) for circulating the coolant in the cooling circuit, a coolant cooler (6) connected in the cooling circuit for cooling the coolant, said coolant cooler comprising a coolant inlet (7) which is via said retarder, which is designed to be used in the cooling circuit flowing coolant as brake medium, connected to a coolant outlet (8) of the internal combustion engine (3) via a first line (9) of the cooling circuit and a coolant outlet (10) connected to a coolant inlet (11) of the internal combustion engine (3) via a second line (12) of the cooling circuit, said first line (9) being connected at a point (13) between the retarder (4) and the coolant cooler (6) to said second line (12) via a third line (14) of the refrigerator to allow the return of coolant to the internal combustion engine (3) without passage through said coolant cooler (6), and a thermostat device (15) with a first thermostat means (16) arranged to regulate the flow of coolant to the coolant cooler. (6) and to said third line (14) depending on the temperature of coolant which is led into the thermostat gear from a pilot line (17) included in the cooling circuit, which at its upstream end is connected to said second line (12), characterized in that the thermostat device comprises a second thermostat means (18) arranged to receive coolant in the first line (9) from the retarder (6) and regulate the flow of coolant to the coolant cooler and to said third line (14 ) depending on the temperature of the received coolant, and that the second thermostat means (18) is designed to open for flow of coolant arriving in the cooling circuit therewith further to the coolant cooler (6) from a second temperature which is at least 5 K higher than a first temperature of coolant arriving in said pilot line (17) to the first thermostat means (16) from which this first thermostat means is designed to open for flow of in the cooling circuit line (9) from the retarder (4) to the coolant arriving thereon to the coolant cooler (6).
    [4]
    Cooling system according to claim 1, characterized in that the second thermostat means (18) is designed to open for flow of coolant to the coolant cooler from a second temperature which is 5-20 K, 5-15 K, 8-15 K or 8-12 K higher than said first temperature.
    [5]
    Cooling system according to claim 1 or 2, characterized in that said first temperature is 70-90 ° C or 75-85 ° C.
    [6]
    Cooling system according to any one of the preceding claims, characterized in that said two thermostat means (16, 18) are arranged in one and the same thermostat housing (19) which has an inlet duct (16, 18) common to the thermostat means (16, 18). 20) which is connected via a first conduit portion (21) of the first conduit (9) to an outlet (22) of the retarder (4), and that the thermostat housing has at least one first outlet channel (23) connected via a second conduit portion ( 24) of the first line (9) with the coolant inlet (7) of the coolant cooler (6) and a second outlet duct (25, 26) connected to said third line (14).
    [7]
    Cooling system according to claim 4, characterized in that the thermostat housing (19) has a single first outlet duct (23) common to the two thermostat members (16, 18).
    [8]
    Cooling system according to any one of the preceding claims, characterized in that said second thermostat means (18) has a valve body (35) which is displaceable between different positions for regulating the flow of coolant from said retarder (4) to the coolant cooler (6) and to said coolant. third conduit (14), a temperature-dependent actuating element (38) and a displaceable part (42) designed to carry the valve body with them when displaced, that the activating element is arranged to influence the displacement position of said part and thus the valve body in dependent of the temperature of the coolant received from the retarder (4), that the valve body has a valve member in the form of a first plate element (36) which is designed to abut against a second plate element (37) in a first end position of the valve body. ) which forms a valve seat between an inlet of the second thermostat means from the retarder and an outlet towards the coolant cooler (6) in order to prevent coolant through this contact a flowing through this thermostat means (18) to the coolant cooler, and that the first plate element (36) is arranged under the action of the activating element (38) slidably away from said abutment against the second plate element (37) for to open a connection between the inlet of the other thermostat means and the outlet to the coolant cooler.
    [9]
    Cooling system according to any one of the preceding claims, characterized in that the first thermostat means (16) has a valve body (27) which is displaceable between different positions for regulating the flow of coolant from said retarder (4) to the coolant cooler (6). ) and to said third line (14), a temperature-dependent actuating element (28) and a displaceable part (30) designed to carry the valve body with them when displaced, that the activating element is arranged to influence the displacement position of said part and thereby valve the body depending on the temperature of the coolant received via the pilot line (17), that the valve body has a valve member in the form of a first plate element (31) which is designed to abut against a second plate element in a first end position of the valve body (32) forming a valve seat between an inlet of the first thermostat means (16) from the retarder (4) and an outlet towards the coolant cooler (6) so that through this abutment preventing coolant from flowing through this thermostat means to the coolant cooler, and that the first plate element (31) is arranged under the action of the activating element (28) slidably away from said abutment against the second plate element (32) to open a connection between the inlet of the first thermostat means and the outlet of the coolant cooler. 10 15
    [10]
    Cooling system according to claim 6 or 7, characterized in that said valve body (27, 35) comprises a second valve member (33, 40) which in a second end position of the valve body is receivable in a second valve seat (34, 41) in order thereby to prevent coolant arriving from the retarder (4) to the thermostat means (16, 18) in question from flowing to said third line (14). Cooling system according to any one of claims 6-8, characterized in that the valve body (27, 35) is displaceable from said first end position in the direction away therefrom under the action of the activating element (28, 38) and against the action of the spring force of a valve body acting on the valve body. spring means (43, 44). Motor vehicles, in particular wheeled motor vehicles, in particular lorries or buses, characterized in that they comprise a cooling system (1) according to any one of claims 1-9.
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    JP2014125884A|2014-07-07|Oil warmer structure
    同族专利:
    公开号 | 公开日
    SE536826C2|2014-09-23|
    BR112015014337A2|2017-07-11|
    WO2014098709A1|2014-06-26|
    EP2932061A1|2015-10-21|
    KR20150095859A|2015-08-21|
    EP2932061B1|2018-01-10|
    EP2932061A4|2016-07-27|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1251433A|SE536826C2|2012-12-17|2012-12-17|Cooling|SE1251433A| SE536826C2|2012-12-17|2012-12-17|Cooling|
    EP13864898.5A| EP2932061B1|2012-12-17|2013-11-25|Cooling system|
    KR1020157018803A| KR20150095859A|2012-12-17|2013-11-25|Cooling system|
    BR112015014337-7A| BR112015014337B1|2012-12-17|2013-11-25|COOLING SYSTEM AND MOTORIZED VEHICLE|
    PCT/SE2013/051381| WO2014098709A1|2012-12-17|2013-11-25|Cooling system|
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