• 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 invention relates to an expansion tank (1) which is intended to be present in a cooling system of a motor vehicle and which comprises: - an outer casing (2), an expansion chamber (3) enclosed in the casing for receiving coolant, and an overpressure valve arranged in the casing (10) for limiting the pressure in the expansion chamber. The housing (2) comprises a first housing part (2a) and a second housing part (2b), the second housing part being slidably connected to the first housing part and installable in different displacement layers relative thereto, thereby allowing a variation of the volume of the expansion chamber ( 3). The invention also relates to a cooling system comprising such an expansion tank.
    公开号:SE1350977A1
    申请号:SE1350977
    申请日:2013-08-27
    公开日:2015-02-28
    发明作者:Zoltan Kardos
    申请人:Scania Cv Ab；
    IPC主号:
    专利说明:

    The invention also relates to a cooling system having the features defined in claim 12.
    Other advantageous features of the cooling system according to the invention appear from the dependent claims and the following description.
    BRIEF DESCRIPTION OF THE DRAWINGS The invention will be described in more detail below with the aid of exemplary embodiments, with reference to the accompanying drawings. It is shown in: Fig. 1 a schematic side view of an expansion tank according to a first embodiment of the present invention, Fig. 2 is a partially cut, schematic side view of the expansion tank according to Fig. 1, with the displaceable housing part shown in a member for minimal expansion chamber volume, Fig. 3 partly cut away, schematic side view of the expansion tank according to Fig. 1, with the displaceable housing part shown in a face for maximum expansion chamber volume, Fig. 4 a schematic side view of an expansion tank according to a second embodiment of the present invention, Fig. a principle sketch of a cooling system according to a first embodiment of the present invention, and Fig. 6 is a schematic diagram of a cooling system according to a second embodiment of the present invention.
    DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION In Figures 1-3, an expansion tank 1 according to a first embodiment of the present invention is illustrated. This expansion tank 1 is intended to be present in a cooling system of a motor vehicle, for example a cooling system 40 of the type illustrated in Fig. 5. The expansion tank 1 comprises an outer casing 2 of rigid material, for example plastic, and an expansion chamber 3 delimited by the casing. The casing 2 comprises a first casing part 2a and a second casing part 2b. The second housing part 2b is slidably connected to the first housing part 2a and can be installed in different displacement layers relative thereto to thereby allow a variation of the volume of the expansion chamber 3. The second housing part 2b is suitably telescopically displaceable relative to the first housing part 2a with the second housing part 2b slidably stored on the first housing part 2a.
    The first housing part 2a is provided with an outlet opening 4 which is intended to be connected to a cooling water line of a cooling system, allowing the exchange of cooling water between the expansion chamber 3 and other parts of the cooling system via this outlet opening 4. The outlet opening 4 is arranged at the bottom of the expansion chamber. 3. A pipe connection 5 connected to the outlet opening 4 projects from the underside of the first housing part. Said cooling water line is intended to be connected to this rudder nozzle 5. The first housing part 2a is provided with an inlet opening 6 which is intended to be connected to a vent line of said cooling system to allow inflow of cooling water and air from this vent line to the expansion chamber 3 via this inlet opening 6. In the illustrated embodiment, the inlet opening 6 is arranged at the bottom of the expansion chamber 3. A pipe connection 7 connected to the inlet opening 6 projects from the underside of the first housing part. Said vent line is intended to be connected to this rudder nozzle 7. The inlet opening 6 could alternatively be arranged in a side cradle of the first housing part 2a and the first housing part 2a could also be provided with two or more inlet openings 6 for connection to each vent line. with said cooling system.
    The first casing part 2a is also provided with a closable filling opening 8, via which cooling liquid can be introduced into the expansion chamber 3 in order in this way to allow filling of cooling liquid to said cooling system. This filling opening is closed by means of a removable lid 9.
    An overpressure valve 10 for limiting the pressure in the expansion chamber 3 and a return valve 11 are arranged on a cradle 12 of the first housing part 2a. In the illustrated embodiment, this cradle 12 is an upper cradle of the first tail portion 2a. In the illustrated example, said valves 10, 11 are arranged at a distance from each other in their respective openings in said cradle 12, but they could alternatively be placed close to each other in a common valve unit which is arranged in a larger opening in said cradle 12. Via the overpressure valve 10 allows air 8 and coolant to flow out of the upper part of the expansion chamber 3 when in connection with the volume increase of the coolant an overpressure arises in the expansion chamber 3 which is higher than a level given by the overpressure valve. Via the return valve 11, air is allowed to flow into the upper part of the expansion chamber 3 from the environment when, in connection with the volume reduction of the cooling water, a negative pressure arises in the expansion chamber 3 which is lower than a level 6 given by the return valve.
    In the embodiment illustrated in Figs. 1-3, the second shell portion 2b is in the form of a shell-shaped hood with a closed end 15 which is water away from the first casing portion 2a and an opposite opening 16 which is water towards the first casing portion 2a. The second housing part 2b is in this case axially displaceably arranged outside about a cylindrical portion 17 of the first housing part 2a, the second housing part 2b having a cylindrical cradle 18 which slidably abuts against the outside of the cylindrical portion 17, either directly or via a plain bearing. The cylindrical cradle 18 and the cylindrical portion 17 have a suitably circular cross-sectional shape, but they could alternatively have an elliptical or rectangular cross-sectional shape. The cylindrical portion 17 has an open end 19 which is water towards the closed end 15 of the second housing part and which is surrounded by the cylindrical cradle 18 of the second housing part 18. The space 20 between the open end 19 of the cylindrical part and the closed end 15 of the second housing part forms part of the expansion chamber 3 and the volume of the expansion chamber 3 will thus vary depending on the actual displacement layer of the second housing part 2b. Fig. 2 illustrates an abutment with a minimum expansion chamber volume with the second housing part 2b in a maximum retraction. Fig. 3 illustrates a base for maximum expansion chamber volume with the second housing part 2b in a maximum extended bearing. The second housing part 2b can also be housed in the displacement layers between these two surfaces.
    In the illustrated example, the cylindrical portion 17 projects in the horizontal direction from the upper part of a base portion 21 of the first housing part 2a.
    In the illustrated embodiment, an expandable bladder 22 of flexible and liquid and air impermeable material is provided to fill the space 20 between the open end 19 of the cylindrical portion and the closed end 15 of the second housing part. The sleeve 22 may, for example, be made of plastic or rubber. material. The bladder 22 is fluidly connected to the cylindrical portion 17 and arranged to thank its open opening 19. The sleeve 22 may, for example, be glued or clamped to the cylindrical portion 17. The bladder 22 prevents air and coolant in the expansion chamber 3 from coming into contact with the vein between the two housing parts 2a, 2b and the bladder 22 thus functions as a sealing means which prevents air and coolant from flowing out of the expansion chamber 3 via the joint between the housing parts 2a, 2b. As an alternative to such a bladder, one or more sealing means may be arranged in the joint between the cavity parts 2a, 2b to prevent air and coolant from flowing out of the expansion chamber 3 via this joint.
    The second casing part 2b could be designed to be displaced manually relative to the first casing part 2a for a manual adjustment of the size of the expansion chamber 3. In the illustrated embodiments, however, the expansion tank 1 is provided with a maneuvering device 30, with the aid of the second casing part 2b is automatically installable in different displacement layers relative to the first housing part 2a. The illustrated actuators 30 include a drive motor 31 with an output shaft 32 and a power transmission mechanism 33 for converting a rotational motion of the output shaft 32 of the drive motor into an axial translational movement of the second housing portion 2b. The drive motor 31 is suitably an electric motor or a hydraulic motor. In the embodiment illustrated in Figs. 1-3, the power transmission mechanism 33 is in the form of a gear shaft with a gear 34 which is rotatably connected to the output shaft 32 of the drive motor and a rack 35 which is fixedly arranged on the outside of the second half part 2b, the gear 34 is in driving engagement with the rack 35. In the embodiment illustrated in Fig. 4, the power transmission mechanism 33 is in the form of a snack shaft with a snack screw 34 'which is rotatably connected to the output shaft 32 of the drive motor and a rack 35 fixedly mounted on the outside of the second housing part. 2b, the snack screw 34 'being in driving engagement with the rack 35. The embodiment illustrated in Fig. 4 otherwise corresponds to the embodiment illustrated in Figs. 1-3. The maneuvering device 30 could alternatively have a different design from that illustrated in Figs. 1-4 and could for instance comprise one or more hydraulic cylinders for displacing the second casing part 2b relative to the first casing part 2a.
    Figures 5 and 6 schematically illustrate two different variants of a cooling system 40 intended for a motor vehicle according to the present invention. This cooling system 40 comprises a cooling circuit 41 for cooling 11 an internal combustion engine 42 of the vehicle by means of a cooling water flowing in the cooling circuit, preferably in the form of water with any freezing point reducing additives such as glycol. A coolant pump 43 is connected to the cooling circuit 41 for circulating the cooling liquid in the cooling circuit. Furthermore, a cooler 44, for example in the form of a conventional cooling water cooler, is connected in the cooling circuit 41 for cooling said cooling water. This cooler 44 includes a cooling water inlet 45a connected to a cooling water outlet 46b of the internal combustion engine 42 via a first conduit 47 of the cooling circuit and a cooling water outlet 45b connected to a cooling water inlet 46a of the internal combustion engine 42 via a second line 48 of the cooling circuit. In the illustrated example, the coolant pump 43 is arranged in the second line 48. The first line 47 is connected to the second line 48 via a third line 49 of the cooling circuit. This third line 49 is arranged to allow cooling water to be returned from the cooling water outlet 46b of the internal combustion engine to the cooling water inlet 46a of the internal combustion engine without the cooling water passing through said cooler 44. The third line 49 thus forms a bypass through which the cooling water cooling circuit can be circulated. Reindeer 44 in its passage between the cooling water outlet 46b and the cooling water inlet 46a of the internal combustion engine 42. Between the cooling water inlet 46a and the cooling water outlet 46b of the internal combustion engine 42, the cooling water is circulated through cooling water channels (not shown) inside the internal combustion engine. A thermostat 50 is provided at the connection point between the first line 47 and the third line 49. Depending on the temperature of the coolant, the thermostat 50 directs the coolant flowing from the internal combustion engine to the cooler 44 to be cooled therein before the coolant is returned to the internal combustion engine 42 or directly back to the internal combustion engine 42 via the third line 49 without passage through the radiator 44.
    The coolant flowing through the radiator 44 is cooled by air which is biased towards the radiator when the motor vehicle is in motion. The cooling system 40 may also include a flap (not shown) which is arranged to generate an air stream through the cooler 44. This flap may be connected to the internal combustion engine 42 to be driven by it.
    The cooling system 40 is provided with an expansion tank 1 of the type described above. The outlet opening 4 of the expansion tank is connected to the above-mentioned second line 48 via a fourth line 51 of the cooling system. The fourth line 51 is connected to the second line 48 at a point located between the cooler 44 and the coolant pump 43. The inlet opening 6 of the expansion tank is connected to the cooler 44 via a first vent line 52 and connected to the cooling water channels in the internal combustion engine 42 via a second vent line 53. 52, 53, coolant is led into the expansion chamber 3 inside the expansion tank 1 and via the above-mentioned fourth conduit 51 coolant returns from the expansion chamber 3 to the cooling circuit 41. The air taken up by the coolant at the coolant circulation through the cooling circuit 41 and thereby accompanies the coolant to the expansion chamber 3 via the vent lines 52, 53 is intended to rise to the surface of the cooling water volume received in the expansion chamber 3 to accumulate in the air-filled space above the water level in the expansion chamber 3. Thereby a venting of the cooling liquid in the expansion tank 1 takes place. 6 illustrated utfo The cooling system 40 comprises an electronic control device 55 which is arranged to control the operating device 30 of the expansion tank depending on the value of the temperature of the cooling liquid in the cooling circuit 41 or the pressure in the cooling circuit 41, whereby the volume of the expansion chamber 3 is varied under the action of the control device 30 depending on the temperature of the cooling liquid in the cooling circuit 41 or the pressure in the cooling circuit 41.
    In the embodiment illustrated in Fig. 5, the control device 55 is arranged to receive the feed value from a pressure sensor 56 which is arranged to supply the pressure in the cooling circuit 41. In the illustrated example, this pressure sensor 56 is arranged in the expansion tank 1.
    In the embodiment illustrated in Fig. 6, the control device 55 is arranged to receive the feed value from a temperature sensor 57 which is arranged to supply the temperature having the cooling liquid in the cooling circuit 41. In the illustrated example this temperature sensor 57 is arranged in the internal combustion engine 42.
    The expansion tank according to the invention and the cooling system according to the invention are especially intended for use in a heavy motor vehicle, such as, for example, a bus, a towing vehicle or a truck.
    The invention is of course not in any way limited to the embodiments described above, but a number of possibilities for modifications thereof should be obvious to a person skilled in the art, without the latter deviating from the basic idea of the invention as defined in the appended claims.
    权利要求:
    Claims (2)
    [1]
    That the cooling circuit (41) comprises an expansion tank (1) according to any one of claims 9-11, and
    [2]
    2. that the cooling system (40) comprises an electronic control device (55), which is arranged to control the operating device (30) of the expansion tank in dependence on the value of the temperature of the cooling liquid in the cooling circuit (41) or the pressure in the cooling circuit (41). 02b 11 ° 24 rc24 /
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    同族专利:
    公开号 | 公开日
    WO2015030649A1|2015-03-05|
    SE537748C2|2015-10-13|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2147699A|1938-01-20|1939-02-21|Gen Motors Corp|Engine cooling system|
    FR1252221A|1959-12-18|1961-01-27|Chausson Usines Sa|Liquid cooling device for internal combustion engines|
    US3238932A|1964-03-30|1966-03-08|Ford Motor Co|Sealed cooling system for an internal combustion engine|
    FR1400560A|1964-04-16|1965-05-28|Chausson Usines Sa|Expansion compensating element for thermal engine cooling circuit expansion vessel and expansion vessel by applying|
    US3765383A|1971-10-08|1973-10-16|V Birdwell|Expansible reservoir unit for liquid cooled engines|
    JPS62147008A|1985-12-19|1987-07-01|Nippon Radiator Co Ltd|Reserve tank|SE540382C2|2016-12-19|2018-09-04|Scania Cv Ab|A tank arrangement for a working medium in a WHR system|
    法律状态:
    2021-03-30| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE1350977A|SE537748C2|2013-08-27|2013-08-27|Expansion tank and cooling system comprising such an expansion tank|SE1350977A| SE537748C2|2013-08-27|2013-08-27|Expansion tank and cooling system comprising such an expansion tank|
    PCT/SE2014/050955| WO2015030649A1|2013-08-27|2014-08-21|Expansion tank and cooling system comprising such an expansion tank|
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