• 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:
    Summary The present invention relates to a cooling system in a vehicle. The cooling system comprises a coolant pump (3) adapted to circulate coolant in the cooling system, a cooler (5) for cooling the coolant, and a valve (10) adapted to direct coolant to the cooler (5) for cooling or to a return line ( 13) without cooling, a first line circuit (6) comprising cooling channels (6a) for cooling the internal combustion engine (1) and a second line circuit (17) for cooling a hydraulic retarder. The first line circuit (6) is adapted to lead the coolant from the coolant purge (3) to a first jump (10c) of the valve (10). The second line circuit (17) is adapted to lead the cooling liquid to a second inlet (10d) of the said valve (10). The valve (10) is adapted to, in the event of operation when the hydraulic retarder is not activated, block the second inlet (10d) and clamed the circulation of coolant through the second line circuit while it consumes coolant from the first line circuit (6) via the first inlet. (10th).
    公开号:SE1351265A1
    申请号:SE1351265
    申请日:2013-10-24
    公开日:2015-04-25
    发明作者:Mats Ekman；Mattias Strindlund；Stig Hildahl
    申请人:Scania Cv Ab；
    IPC主号:
    专利说明:

    BACKGROUND OF THE INVENTION AND PRIOR ART The present invention relates to a cooling system in a vehicle according to the preamble of claim 1.
    Heavy vehicles are often equipped with one or more auxiliary brakes to reduce wear on the vehicle's regular wheel brakes. Such an auxiliary brake can be a hydraulic retarder. In a type of hydraulic retarder, oil is used as the working medium. D. the vehicle is braked with the help of the retarder, the oil receives a rapid heating. The hot oil is led to a heat exchanger where the oil is cooled by the cooling water circulating in the vehicle's cooling system. The cooled oil is then passed back to the retarded barrel for use. In another type of hydraulic retarder, the cooling fluid instead of oil is used as the working medium in a retarder. The refrigerator is connected in this case in a direct heating in the retarder.
    The cooling system usually comprises a line circuit where the cooling liquid first cools the combustion engine and then the retarder. In cases where the retarder is not activated, it generates no heat energy and thus does not need to be cooled. In such cases, the coolant instead receives a cooling effect when it is passed through the heat exchanger or retarder. The cooling of the coolant can be conducted through the retarder or vane exchanger. The time it takes for it to reach a desired operating temperature after a cold start is extended.
    This cooling also makes it more responsive for the coolant to heat up to a desired operating temperature at times when the vehicle is driven in a cold ambient environment. The continuous flow of coolant through the retarder or warning exchanger results in an additional pressure drop. The cooling system WO 98/15726 shows a cooling system in a vehicle with a circulating coolant which cools an internal combustion engine and a retarder. In cases where the retarder is not activated, the coolant can be led past the retarder via a bypass line. The cooling system comprises a conventional thermostat which leads the cooling liquid to a cooler as it has a temperature above a control temperature and to a return line without cooling when it had a lower temperature than the control temperature. The coolant is circulated in the cooling system with a variable flow with the help of one or more coolant pumps. A control unit controls the 2 coolant flow in the cooling system with the help of the coolant pump and a possible control valve so that the temperature of the internal combustion engine does not exceed a predetermined maximum temperature. SUMMARY OF THE INVENTION The object of the present invention is to provide a cooling system in a vehicle for cooling an internal combustion engine and a hydraulic retarder where the cooling of the retarder does not substantially affect the cooling system in a negative sense. This object is achieved with the features in the contemplative part of claim 1. According to the invention, the cooling system uses a first line circuit to cool the combustion engine and a second line circuit to directly or indirectly cool off the frame generated in the retarder. The cooling vessel is led clamed in parallel in the two line circuits to a valve that replaces a conventional thermostat in the cooling system.
    The valve thus comprises a separate inlet for the respective line circuits. The valve is designed so that during operation of the vehicle, when the retarder is not activated, it is adapted to block the second inlet which is connected to the second line circuit. Thus, the flow of coolant through the second line circuit can be stopped in a simple and reliable manner. In this case, the valve receives cooling fluid only from the first line circuit and via the first inlet. The cooling circuit in the cooling system thus circulates in this case only through the first control circuit. flamed The coolant receives a shorter transport path per vary in the cooling system before passing through the heat exchanger or retardem. The presence of the heat exchanger or retarder in the cooling system does not result in increased flow losses. The short transport carriage of the coolant also results in a relatively high amount of coolant being circulated in the cooling system, which promotes a rapid heating of the coolant to a desired operating temperature after a cold start. Using one and the same valve SOIT1 both teiniostat and father to control the coolant flow through the second line circuit results in the cooling system requiring few components. A cooling system of the above-mentioned type is thus not substantially adversely affected by the fact that it comprises a heat exchanger for cooling oil from a hydraulic retarder or for direct cooling of retarder.
    According to an embodiment of the present invention, the valve is adapted to direct the received coolant from the first line circuit to a return line without being cooled 3 when it has a lower temperature at a predetermined control temperature and to the cooler to be cooled when it reaches a higher temperature. the predetermined control temperature. Such a valve thus functions ph the same way as a conventional thermostat and the cooling water is led to the cooler fcirst da. it has been heated to a higher temperature than the control temperature. The cooling system thus has a corresponding function as a conventional cooling system and the retarder is not activated.
    According to an embodiment of the present invention, the valve is adapted to, in the case of operation in which the hydraulic retarder is activated, block the first inlet and thus the circulation of coolant through the first line circuit while receiving coolant from the second line circuit via the second inlet. When a retarder is activated, the supply of fuel to the internal combustion engine usually ceases. The vehicle has engine brakes and cold air is pumped through the internal combustion engine.
    The internal combustion engine thus essentially requires no cooling. For this reason, it is also necessary to have a Mgt coolant flock through the internal combustion engine. With the aid of said reversal, the cooling fluid floc in the first control circuit is blocked and a simple and efficient set of the retarder is activated. In this case, the cooling vane is led to the valve only via the second line circuit. The flow losses of the cooling fluid are relatively small, in which case the cooling fluid does not have to circulate through the relatively narrow cooling channels of the combustion engine.
    According to an embodiment of the present invention, the valve is adapted to, in the case of operation in which the hydraulic retarder is activated, reduce the circulation of coolant through the first line circuit while at the same time receiving cooling water Evan the second line via the second inlet. During certain operating cases, it may be appropriate to maintain a small flow of coolant through the first line circuit cid the retarder is activated. The valve may have a design that allows a reduced cooling water flow through the first line circuit. The valve can in this case have a design so that it does not block the first inlet completely titanium sldpper ferbi a small amount of coolant. Alternatively, the valve may be formed with a bypass line leading a reduced amount of cooling water past the blocked first inlet. Such a bypass line can lead a reduced amount of cooling water from the first line circuit to the valve via an additional inlet which is not blocked. According to an embodiment of the present invention, the valve is adapted to, in the event of operation when the retarder is activated, direct the received cooling fluid from the second line circuit to the radiator to be cooled regardless of the temperature of the cooling fluid. Yes. a retarder is activated, as a rule, the cooling system is loaded hard and especially if the retard is activated for a long time on a long downhill slope. It is very convenient to direct the entire coolant flow through the radiator as soon as the retarder is activated.
    According to an embodiment of the present invention, the cooling system comprises a control unit adapted to receive information from a brake unit indicating whether the retarder is activated or not and to control the valve with the aid of this information.
    The control unit may comprise a computer unit or a part of such which is provided with a suitable software for controlling the valve. The control unit may be adapted to receive information from a temperature sensor regarding the temperature of the coolant, to determine if the coolant has a higher temperature than the predetermined control temperature and to control the valve by means of this information. The control temperature map must be a constant temperature. However, it is possible for the control unit to compare the temperature of the cooling system with a non-constant control temperature that varies under different operating conditions.
    According to an embodiment of the present invention, the second line circuit is adapted to receive coolant from a position in the first line circuit which is the bellows downstream of the coolant pump and upstream of the cooling motor of the combustion engine. Thus, both the conductor circuits are arranged adjacent to the pressure side of the coolant pump. When the valve blocks one of the wiring circuits, the cooling fluid is led from the pump through the remaining open wiring circuit. It is possible to provide circulation of the coolant through the first line and the second line with one and the same coolant pump. The cooling system thus needs only one coolant pump. The first line may comprise at least one additional component in addition to the internal combustion engine which is cooled by the cooler in the and that the second line circuit is adapted to receive cooling fluid from the first line circuit in a position which is bellows upstream of said additional components.The cooling system may include, for example, a heat exchanger for cooling engine oil and a heat exchanger for cooling gear oil before cooling in the internal combustion engine. As a rule, flake combustion does not take place in the combustion engine when the retarder Ar is activated, less or more cooling of the engine oil and the gear oil is required.At the same time, cooling fluid with an optimal low temperature can be led to the heat exchanger working medium in the retardem as this coolant is not used for cooling the Wagon upstream coated component in the cooling system.
    According to an embodiment of the present invention, the valve comprises a valve body which is adjustable in different layers in which it simultaneously blocks one of the inlets and one of the outlets so that cooling water is led from the remaining unblocked inlet to the unblocked outlet. A shllan valve can be arranged in a valve housing with an internal space which has a circular cross-section. Inlets and outlets can be arranged in different positions along the circular periphery of the vent housing. The valve body map hdr is stabled in different turns where it blocks an inlet and an outlet at the same time as it exposes a remaining inlet and outlet. The valve may alternatively comprise a valve body in the form of a movably arranged piston which can be displaced to different layers in which it simultaneously blocks one of the inlets and one of the outlets. The valve may also comprise a valve body which is both rotatable and displaceable.
    BRIEF DESCRIPTION OF THE DRAWINGS In the following, as an example, a preferred embodiment of the invention is described with reference to the accompanying drawings, in which: Fig. 1 shows a cooling system in a vehicle according to an embodiment of the invention and Fig. 2a shows the valve in Fig. 1 1 three different teams under different operating conditions. DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT OF THE INVENTION Fig. 1 shows a cooling system with circulating a cooling water for cooling an internal combustion engine 1 in a schematically shown vehicle 2. 1. The coolant pump 3 can be driven in a conventional manner by the internal combustion engine 1 with a lateral joke shown transmission. The cooling water cooling system is cooled in coolers 5 which may be arranged at a front part of the vehicle 2. The cooling system comprises a first line circuit 6 which comprises a part of the inlet line 4 which leads the cooling water channel from the cooling water pump 3 to the internal combustion engine 1. The first line circuit 6 then comprises a passage 6 through a first heat exchanger 7 for cooling engine oil and passage through a second heat exchanger 8 for cooling gear oil. The cooling liquid in the first line circuit is then led through cooling channels 6a in the internal combustion engine 1 for cooling various parts and components of the internal combustion engine such as the areas adjacent to the cylinders 9 of the internal combustion engine.
    The coolant in the first line circuit 6 is then led to a valve 10. The valve 10 is controlled by a control unit 11. The control unit 11 receives information from a temperature sensor 12 which senses the temperature of the coolant in a suitable place in the first line circuit 6. In cases where the coolant temperature is below a control temperature, the valve 10 leads the cooling liquid to a first return line 13 which returns the cooling liquid to the cooling liquid pump 3 without cooling. At times when the temperature of the coolant is greater than the control temperature, the valve 10 leads the coolant, via a line 14, to the cooler 5 for cooling. The cooling fluid is cooled by air which is led through the cooler 5 with the aid of a cooling surface 15. The cooled cooling fluid is led from the cooler 5, via a second return line 16, back to the inlet line 4 and the cooling water pump 3.
    The cooling system comprises a second line circuit 17 which receives coolant from the first line circuit 6 in a position downstream of the coolant pump 3 and upstream of the components cooled by the coolant in the first line circuit. The second line circuit 17 thus receives coolant from the first line circuit 6 in a position upstream of the heat exchanger 7 for cooling engine oil, the heat exchanger 8 receives cooling of gear oil and the cooling ducts 6a in the internal combustion engine 1. The second line circuit 17 leads the coolant to a third heat exchanger 18 adapted to cooling oil frail a hydraulic retarder. The second line circuit 17 then leads the cooling liquid to the valve 10. The control unit 11 receives information from a brake unit 19 which informs whether the retarder is activated or not. The valve 10 is designed so that it blocks the circulation of cooling water through the second line circuit 17, i.e. the retarder is not activated. Thus, in this case, all the coolant from the coolant pump 3 is passed through the first line circuit and the valve 10. The valve 10 is designed so that it blocks or at least significantly reduces the circulation of coolant through the first line circuit 17 when the retarder is activated. In this case, all or a major part of the cooling vessel is led from the cooling water pump 3 through the second line circuit and the valve 10. Figs. 2a-c show an embodiment of a valve 10 having the function described in cyan. The valve 10 comprises a rotatable valve body 10a. The valve body 10a in this case consists of a semicircular body. The valve body 10a is arranged in a cylindrical valve housing 10b with a circular peripheral wall. The valve housing 10b includes a first inlet 10e in the circular cradle for receiving coolant from the first conduit circuit 6 and a second inlet 10d in the circular cradle for receiving coolant from the second conduit circuit 17. The valve housing 10b includes a first outlet 10e in the circular the cradle for guiding coolant to the conduit 14 and the radiator and a second outlet 10f in the circular cradle for guiding coolant to the first return line 13. The inlets 10c, 10d are arranged on opposite sides of the circular peripheral cradle. The outlets 10e, 10f are arranged between the inlets 10e, 10d on opposite sides of the circular peripheral cradle.
    During operation of the internal combustion engine 1, the coolant pump 3 circulates coolant through the cooling system. The control unit 11 essentially continuously receives information from the well unit 19 which indicates whether the retarder is activated or not. The control unit 11 receives information indicating that the retarder is not activated and when it receives information from the temperature sensor 12 that the coolant has an Idgre temperature at the control temperature, it places the valve in a position shown in Fig. 2a.
    The valve body 10a blocks in the first lead the second inlet 10d connected to the second conduit circuit 17. The valve body 10a simultaneously blocks the second outlet 10f connected to the conduit 14. The valve receives clamed coolant from the first conduit circuit 6 via the first inlet 10c. it leads via the first outlet 10e to the first return line 13. Darmecl leads the cooling liquid as cooled engine oil in the first heat exchanger 7, gear charge oil in the second heat exchanger 8 and the combustion engine 1 to the first return line 13. The cooling liquid is led clamed back to the inlet line 4 without cooling in the radiator 5. Since the valve body 10a blocks the second inlet 10d, the cooling water flow is stopped firmly through the second line circuit 17. Some cooling water flock through the second line section 17 is also not justified as there is no flake hot oil fine retardem to cool in the third heat exchanger 18. Not to lead coolant through the other a line portion 17 di retardem is not activated has several advantages. The cooling fluid does not provide armed cooling in the third water exchanger 18, which is the case when it is not re-energized by the water. This has the advantage that the cooling liquid can provide a faster heating to a desired operating temperature after, for example, a cold start. Since the cooling liquid does not need to be circulated through the second line circuit 17, it can circulate a relatively short wave under a varying cooling system. Thus, a relatively limited amount of coolant can circulate in the system, which also results in the advantage that the coolant provides a faster heating to a desired operating temperature after a cold start. Finally, reduced flow losses are obtained as the coolant does not have to circulate through the second line circuit and the third heat exchanger 18.
    When the control unit 11 receives information from the temperature sensor 12 which indicates that the cooling liquid has been heated to a higher temperature than the control temperature, the cooling liquid needs to be cooled. The control unit 11 places the valve body 10a in a second layer as shown in Fig. 2b. The valve body 10a blocks in the second act the second inlet 10d which is connected to the second line circuit 17. The valve body 10a simultaneously blocks the first outlet 10e which is connected to the first return line 13. The first inlet 10c which receives cooling water from the first line circuit 6 is thus still up. The valve 10 in this case discharges the coolant from the first line circuit 6, via the second outlet 10f, to the line 14 and the cooler 5. The coolant is cooled in the cooler 5 by the air which the radiator surface 15 sucks through the cooler 5. The cooled coolant is then led, via the second return line 16, back to the inlet line 4 and the cooling water purifier 3. Even during this operating condition, the cooling water circulates a shorter wave per vary in relation to a corresponding conventional cooling system as it does not have to circulate through the second line circuit and the third heat exchanger 18. Thus the cooling water can even during data operating conditions provide reduced flow losses.
    When the control unit 11 receives information from the brake unit 19 indicating that the retarder has been activated, it places the valve 10 in a third position shown in Fig. 2c.
    The valve body 10a in the third layer blocks the first inlet 10c connected to the first line circuit 6. This stops the circulation of coolant through the first line circuit 6. Since the fuel injection to an internal combustion engine 1 normally ceases when a retarder is activated, the internal combustion engine 1 does not need to be activated. the first heat exchanger 7 and the gear oil in the second heat exchanger 8 have essentially no cooling. The valve body 10a simultaneously blocks the first outlet 10e which is connected to the first return line 13. In this case, the cooling liquid is led out, via the second outlet 10f to the line 4 and the cooler 5 for cooling. 9 Thus, coolant is led directly to the radiator 5 to be cooled as soon as the retarder is activated. When a hydraulic retarder is activated, it results in most cases in a large load on the cooling system. In cases where the coolant has a lower temperature than the control temperature, in this case it is not customary for the coolant temperature to rise to the control temperature before the coolant is led to the cooler 5. This does not expose the cooler 5 to the same thermal load as in a cold condition. receive a start Slide of very hot coolant. Avon in this case the coolant receives a shorter circulation wave per vary in a corresponding conventional cooling system because the coolant into believer is passed through the first line circuit.
    With this, the cooling liquid can obtain relatively low flow losses as it does not have to circulate through the relatively narrow cooling channels of the internal combustion engine 1.
    In some cases, however, it may be appropriate to maintain a minor cooling ash flow through the first lead circuit 6 at times when the retard is activated. For this reason, the valve 10 can be provided with a bypass line 10g which leads a reduced cooling water flow from the first line circuit 6 into the valve 10 via an additional inlet I Ogi. The reduced amount of coolant from the first line circuit is mixed in this case with the coolant from the second line circuit 17 after which the coolant is led out, via the second outlet 10f, to the line 4 and the radiator 5. Fig. 2c shows the valve body in a layer as it exposes the extra inloppet lOgi. However, the veritable body 10a can be rotated slightly to a few degrees in a clockwise direction to a low position, it also blocks the extra inlet opening 10g in addition to already blocking the third inlet 10c and the first outlet I0e. In this layer, the cooling water flow line completely blocks the third line circuit 6.
    In the above-described embodiment of the cooling system, the oil used as working medium in a hydraulic retarder in a heating shaft cools. The cooling system can of course also be used for hydraulic decelerators of the type that any other cooling water acts as a working medium. In this case, the cooling vessel is led through the retarder instead of the heat exchanger 18.
    The invention is in no way limited to the embodiment described in the drawing but can be used freely within the scope of the claims. The valve can have an essentially arbitrary design but with the function described above.
    权利要求:
    Claims (10)
    [1]
    I. A cooling system in a vehicle, the cooling system comprising a cooling water pump (3) adapted to circulate cooling liquid in the cooling system, a cooler (5) for cooling the cooling liquid, and a valve (10) adapted to direct cooling liquid to the cooler (5) for cooling or to a return line (13) without cooling, a first line circuit (6) comprising cooling channels (6a) for cooling the internal combustion engine (1) and a second line charge (17) for cooling a hydraulic retarder, characterized in that the first line circuit (6) is adapted to lead the cooling fluid to a first inlet (10c) of the valve (10) and that the second line circuit (17) is adapted to lead the cooling fluid to a second inlet (10d) of the said valve ( 10), wherein the valve (10) is adapted to, in the event of operation when the hydraulic retarder is not activated, block the second inlet (10d) and thus the circulation of coolant through the second line circuit at the same time as it receives coolant from the first line. circuit (6) via the farthest inlet (10c).
    [2]
    Cooling system according to claim 1, characterized in that the valve (10) is adapted to direct the received, cooling liquid from the first line circuit (6) to a return line (13) without being cooled as it has a lower temperature than a predetermined control temperature and to the cooler (5) fails to cool down because it has a higher temperature than the predetermined control temperature.
    [3]
    Cooling system according to claim 1 or 2, characterized in that the valve (10) is adapted to, in the case of operation in which the hydraulic retarder is activated, block the first inlet (10c) and thus the circulation of cooling water gement the first line circuit (6) at the same time it receives cooling fluid from the second conductor circuit (17) via the second inlet (10d).
    [4]
    Cooling system according to claim 1 or 2, characterized by the valve (10) adapted to, in the event of operation when the hydraulic retarder is activated, reduce the circulation of the cooling fluid through the first line circuit (6) while receiving cooling fluid from the second line circuit ( 17) via the second inlet (10d).
    [5]
    Cooling system according to claim 3 or 4, characterized in that the valve (10) is adapted to, in the case of operation when the retarder is activated, lead the received coolant from the second line circuit (17) to the cooler (5) before cooling regardless of the temperature of the coolant. 11
    [6]
    Cooling system according to any one of the preceding claims, characterized in that the cooling system comprises a control unit (11) adapted to receive information from a brake unit (19) indicating whether the retarder is activated or not and to control the valve (10) by means thereof. information.
    [7]
    Cooling system according to claim 6, characterized in that the control unit (11) is adapted to receive information from a temperature sensor (12) regarding the temperature of the cooling water, to determine if the cooling water has a higher temperature than the predetermined control temperature and to control the valve (10) of this information.
    [8]
    Cooling system according to any one of the preceding claims, characterized in that the second line circuit (17) is adapted to receive cooling fluid from the first line circuit (6) in a position such that the coils are downstream of the coolant pump (3) and upstream of the internal combustion engine cooling channels (6a)
    [9]
    Cooling system according to claim 8, characterized in that the first line circuit (6) comprises at least one further component (7, 8) in addition to the internal combustion engine (1) which is cooled by the cooling circuit in the first line circuit (6) and that the second line circuit (17) is adapted to receive cooling water from the first line circuit (6) in a position which is located upstream of the additional components (7, 8).
    [10]
    Cooling system according to ridgot of the preceding claim, characterized in that said valve (10) comprises a valve body (10a) which is adjustable in different layers in which it simultaneously blocks one of the inlets (10c, 10d) and one of the outlets (10e, 10 So that the cooling water is led from the remaining non-blocked inlet (10c, 10d) to the lac blocked outlet (10e, 100. 2 1/2 1911 14 16
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    同族专利:
    公开号 | 公开日
    SE538626C2|2016-10-04|
    EP3060773A4|2017-08-23|
    KR101784428B1|2017-10-11|
    KR20160053985A|2016-05-13|
    RU2628689C1|2017-08-21|
    BR112016006419A2|2017-08-01|
    WO2015060768A1|2015-04-30|
    CN105658927B|2018-04-13|
    EP3060773A1|2016-08-31|
    US20160251998A1|2016-09-01|
    US10156181B2|2018-12-18|
    CN105658927A|2016-06-08|
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    法律状态:
    2021-06-01| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE1351265A|SE538626C2|2013-10-24|2013-10-24|Cooling system in a vehicle|SE1351265A| SE538626C2|2013-10-24|2013-10-24|Cooling system in a vehicle|
    PCT/SE2014/051179| WO2015060768A1|2013-10-24|2014-10-08|Cooling system in a vehicle|
    CN201480057834.4A| CN105658927B|2013-10-24|2014-10-08|Cooling system in vehicle|
    EP14855597.2A| EP3060773A4|2013-10-24|2014-10-08|Cooling system in a vehicle|
    KR1020167009145A| KR101784428B1|2013-10-24|2014-10-08|Cooling system in a vehicle|
    BR112016006419A| BR112016006419A2|2013-10-24|2014-10-08|cooling system in a vehicle|
    US15/030,433| US10156181B2|2013-10-24|2014-10-08|Cooling system in a vehicle|
    RU2016118585A| RU2628689C1|2013-10-24|2014-10-08|Cooling system for vehicles|
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