• 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:
    The invention relates to an arrangement (5) for venting a radiator (8, 19, 42) in a cooling system (4) in a vehicle. The arrangement comprises a valve (35) in which a closing mechanism is arranged to in a first position expose a vent connection between the cooler (8,19,42) and an expansion tank (12) and in a second position to close the connection between the cooler (8,19, 42) and the expansion tank (12). According to the invention, the valve (35) is closed when the engine is in operation to avoid continuous deaeration. (Fig. 2)
    公开号:SE1550961A1
    申请号:SE1550961
    申请日:2015-07-03
    公开日:2017-01-04
    发明作者:Ekman Mats；Enbuske David；Hildahl Stig；Liljegren Lars；Syversen Jan-Erik
    申请人:Scania Cv Ab；
    IPC主号:
    专利说明:

    TECHNICAL FIELD The present invention relates to an arrangement for venting a cooling object in a cooling system, an internal combustion engine comprising such an arrangement and a vehicle comprising an internal combustion engine with a venting arrangement according to the appended patent. cooling system for a liquid-cooled internal combustion engine includes a coolant for cooling coolant, a coolant pump for circulating the coolant through the cooler and an expansion tank.
    When coolant is added to a vehicle with a liquid-cooled internal combustion engine, it is important that all air in the cooling system is eliminated in order to e.g. the coolant pump is not damaged. In order to avoid air remaining in, above all, locally located parts of the cooling system, vent lines are used which direct the air from such parts of the cooling system to the expansion tank during operation of the vehicle.
    Known cooling systems usually include at least one additional cooling object in addition to the engine. Such an additional cooling object can e.g. be an auxiliary brake in the form of a hydraulic retarder. The oil in the retarder is cooled via a retarder cooling circuit which is connected to the cooling system. As the retarder is not used continuously, no continuous cooling or deaeration of it is required, which means that it is not deaerated during operation of the vehicle. Continuous venting of cooling objects that do not require this, in this case the retarder, causes parasite losses because the coolant pump must be activated more than necessary and the venting flow through the expansion tank increases, which results in poorer venting.
    A problem in this context is that in the case of additional cooling objects such as e.g. with the retarder, air remains in the cooling system after the object has been emptied of coolant and then refilled, e.g. in connection with maintenance or repair. Since continuous deaeration is not desirable, it is common to arrange manually actuable deaeration nipples in connection with positions where air confinement can be formed. One problem with such a solution is that it requires the operator to understand that venting is done with the vent nipples and that the operator also remembers to vent manually.
    SUMMARY OF THE INVENTION An object of the present invention is to provide an arrangement which enables a reliable and efficient venting of cooling circuits. The invention particularly aims to provide such an arrangement for cooling objects where continuous deaeration is not desirable.
    This and other objects are achieved by the features set forth in the appended claims.
    The arrangement includes a valve in a vent passage. When the coolant bag is filled on the cooling system, the valve is open so that air can be led from a cooling object via the vent line to the expansion tank. When the cooling object has been vented and the cooling system has been filled with coolant, the valve is automatically set to the closed position. This breaks the connection between the cooling object and the expansion tank, which results in no continuous deaeration during operation of the vehicle. This reduces the risk of parasite losses and the risk of damage to the coolant pump and contributes to better venting in the expansion tank. In addition, since deaeration takes place automatically, the operator does not have to remember to deaerate manually.
    According to an embodiment of the invention, the valve is closed by means of a pressure generated by the coolant when refilling coolant. The valve for this purpose comprises a float body which senses the level of the coolant in the valve and which closes the deaeration passage at times when the surface body reaches a level which indicates that the deaeration is completed. The valve is then closed until the cooling system is drained of coolant, e.g. for repair or maintenance. Such a design can be given fairly simple with functional design at the same time as it ensures that the cooling system is only vented if necessary.
    According to another embodiment of the invention, the valve is adapted to be closed by means of a pressure generated by the coolant pump via a pilot line when the engine is in operation and return to the open position when the pressure drops below a certain predetermined value.
    When the internal combustion engine starts, the coolant pump starts and thus the circulation of coolant in the cooling system. When this happens, an overpressure is created in the pilot line which is propagated to the valve, whereby it closes the vent passage. When the engine is stopped, the coolant pump and thus the circulation of cooling medium in the cooling system stops. When this happens, the pressure in the pilot line and thus the valve that opens opens. This ensures that no venting takes place after the engine has been started.
    Other features and advantages of the invention will be apparent from the claims, the description of embodiments and the accompanying figures.
    BRIEF DESCRIPTION OF THE DRAWINGS In the following, embodiments of the invention are described by way of example with reference to the accompanying drawings, in which: Fig. 1 schematically shows a vehicle driven by an internal combustion engine.
    Fig. 2 schematically shows a cooling system with an arrangement for venting a cooling object according to the present invention.
    Fig. 3 shows a perspective view with broken away parts of a valve in the venting arrangement in a venting position, i.e. when the engine is switched off Fig. 4 shows a perspective view with broken away parts of a Valve in the venting arrangement when the engine is in operation and no venting takes place via the valve.
    Fig. 5 shows a perspective view with broken away parts of an alternatively designed valve in the venting arrangement in a venting position, i.e. when the engine is off.
    Fig. 6 shows a perspective view with broken away parts of an alternatively designed valve in the venting arrangement when the motor is in operation and no venting takes place via the valve.
    DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION I f1g. 1 shows a vehicle 1 driven by an internal combustion engine 2. The internal combustion engine 2 may be a diesel engine, preferably a supercharged diesel engine, or a single-engine engine cooled by a coolant circulating in a cooling system 4. The vehicle 1 may be a heavy vehicle such as e.g. a truck or a bus or a lighter vehicle such as e.g. a car. In alternative embodiments, the internal combustion engine 2 need not be installed in a vehicle 1 but may be a separate engine adapted to drive e.g. an electricity generating unit or a boat.
    I f1g. 2, the cooling system 4 is shown with an arrangement 5 for venting a cooling object 6 according to the present invention. The cooling system 4 comprises in the vehicle engine 2 designed cooling channels not shown which are flowed through by the coolant 3 for cooling the motor 2. The cooling system 4 further comprises a cooler 8 for cooling the coolant 3, a coolant pump 9 for circulating the coolant 3 in the cooling system 4 and a downstream motor 2 arranged thermostat 10 to control the coolant 3 in the cooling system 4 depending on the temperature. The coolant pump 9 is arranged to be driven by the motor 2. The cooler 8 comprises a removable plug 11l to enable draining of the coolant 3 during maintenance or repair.
    The volume of the coolant 3 varies with its temperature and the cooling system 4 therefore comprises an expansion tank 12 with an internal space which absorbs the varying volume. The expansion tank 12 comprises a removable lid 13 to enable the filling of coolant 3 to the cooling system 4.
    A vent line 16 for the coolant 3 extends between an outlet of the engine 2 cooling ducts and an inlet of the expansion tank 12 in which any air in the cooling system 4 is continuously separated from the coolant 3 during operation of the engine 2. A corresponding vent line 17 extends between an outlet 8 and the radiator. inlet of the expansion tank 12 which is arranged on a relatively other components of the cooling system 4 high level to facilitate filling and deaeration.
    The cooling system 4 comprises an additional cooling object 6 in addition to the motor 2 in the form of an additional brake which is constituted by a hydraulic retarder. During braking with the retarder, kinetic energy in the retarder is converted into internal energy which is transferred to the retarder's working medium, for example oil. The vehicle's cooling system 4 is then a retarder utilized provided with a cooler 19 for cooling the retarder oil during the braking process by means of the coolant 3 in the cooling system 4.
    An outlet from the cooling ducts of the engine 2 is connected to an inlet of the retarder cooler 19 via a first line 22. An outlet from the retarder cooler 19 is connected to an inlet of the thermostat 10 via a second conduit 23. A first outlet from the thermostat 10 is connected to an inlet to the cooler 8 via a third line 24. An outlet from the cooler 8 is connected to an inlet to the coolant pump 9 via a fourth line 25. A first outlet from the coolant pump 9 is connected to an inlet to the engine's 2 cooling channels via a fifth line 26. A second outlet from the thermostat 10 is connected to the inlet of the coolant pump 9 via a bypass line 27 which enables coolant 3 to be led past the cooler 8 until the coolant 3 reaches normal operating temperature. An outlet on the expansion tank 12 is connected to the inlet to the coolant pump 9 via a sixth line 28.
    The arrangement 5 for venting the cooling object 6, in this example the retarder cooler 19, comprises a valve 35 with an outlet which is connected to an inlet of the expansion tank 12 via a line 36. An outlet of the retarder cooler 19 is connected to a first inlet of the valve 35 via a first vent line 37 and an outlet of the coolant pump 9 is connected to a second inlet of the valve 35 via a pilot line 38. The valve 35 is adapted to in a first position which is a vent position allow air to flow in the first vent line 37 through the valve 35 to the expansion tank 12 and in a second position which is a shut-off position prevent air from flowing through the valve 35. The valve 35 is adapted to be set in the second position by means of a pressure P generated coolant pump 9 via the pilot line 38 when the engine is in operation and return to the first position when the pressure P drops below a certain predetermined value. The deaeration arrangement 5 may comprise an additional ell your valves 35 for venting additional cooling object 6 without losing the idea of invention.
    When the motor 2 starts, the coolant pump 9 starts and thus the circulation of coolant 3 in the cooling system 4. When this occurs, an overpressure is created in the pilot line 38 which propagates to the valve 35 which closes and thereby ensures that no venting after the motor is put into operation, ie. started. When the motor 2 is stopped, the coolant pump 9 stops and thus the circulation of coolant 3 in the cooling system 4. When this occurs, the pressure in the pilot line 38 and in the valve 35 which opens decreases. This ensures that deaeration takes place after the motor 2 has been taken out of operation, ie. stopped.
    The valve 35 is thus closed by means of an overpressure in the pilot line 38 which in the described embodiment is directly connected to the coolant pump 9. However, the pilot line 38 can be connected to any other suitable connection of the cooling system 4 where the pressure during operation of the motor 2 is high enough to close the valve. In an alternative embodiment, the pilot line 38 is connected to an outlet of the motor 2.
    According to an embodiment of the invention, the cooling system 4 comprises a second vent line 40, one end of which is connected to an outlet of the radiator 8 and the other end of which is connected to an inlet of the valve 35 for venting the radiator to the expansion tank 12. The radiator 8 then forms a further cooling object. ect 6 which is vented when the motor 2 is not in operation.
    According to another embodiment of the invention, the cooling system 4 comprises a third vent line 41, one end of which is connected to the outlet of an EGR cooler 42 and the other end of which is connected to an inlet of the valve 35 for venting the EGR cooler 42 to the expansion tank 12. The EGR cooler 42 which is arranged that cooling recirculation of exhaust gases then constitutes an additional cooling object 6 which is deaerated when the engine 2 is not in operation.
    The deaeration arrangement 5 can be used in connection with refilling of coolant 3 in the cooling system 4 after it has been emptied of coolant 3 in connection with e.g. service or repair. The backfilling can take place at any suitable point in the cooling system 2, but preferably through a filling nipple (not shown) or the like which is arranged at a low level in the cooling system 4, for example under the radiator 8. via the expansion tank 12 after the cover 13 has been removed.
    I f1g. 3 and 4 show a perspective view with broken away parts of the valve 35 of the deaeration arrangement 5 according to an embodiment of the invention. Fig. 3 shows the valve 35 in a venting position, i.e. when the engine is off and f1g. 4 shows the valve 35 when the engine is in operation and no venting takes place via the valve 35.
    The valve 35 comprises an upper area in which a first inlet 43 is arranged which is connected to an outlet of the retarder cooler 19 (Fig. 2) via the first vent line 37 and an outlet 44 which is connected to an inlet of the expansion tank 12 (Figs. 2) via line 36. The valve 35 further comprises a lower area in which a second inlet 45 is arranged which is connected to an outlet on the coolant pump 19 (Fig. 2) via the pilot line 38 to receive a pressure P generated by the coolant pump 19 (Fig. 2).
    In an alternative embodiment, the valve 35 comprises a third inlet 46 arranged in the upper region which is connected to an outlet of a further cooling object such as e.g. the cooler 8 (Fig. 2) via the second vent line 40 or an outlet on the EGR cooler 42.
    The valve 35 comprises a closing mechanism in the form of a spherical body 47 e.g. ball 48 or ball arranged in a space 49 of the valve 35. The spherical body47 has a diameter of between 20 and 35 mm. The space 49 is connected to the first inlet 43, the second inlet 45 and the third inlet 46 the inlet and the co-outlet 44. The ball 48 is arranged to allow in a first position a deserted F through valve 35, in through the first inlet 43 and the third inlet 46. and out the through-outlet 44 for venting cooling object 6 (Fig. 2). The ball 48 is in the first position, as shown in FIG. 3, arranged to rest by gravity against the bottom of the space 49 in the valve 35 against the second inlet 45 and arranged to be in a second position, which is shown according to 1g. 4 close the first inlet 43 and the third inlet 46 for preventing the supply of F F to the expansion tank 12.
    When the combustion engine 2 starts, the coolant pump 9 starts and thus the circulation of coolant 3 in the cooling system 4. When this happens, an overpressure is created in the pilot line 38 which propagates to the space 49 and pushes the ball 48 upwards into the space 49 so that it closes the passage through the valve 35. deaeration takes place after the engine has been started. When the engine is stopped, the coolant pump 9 stops and thus the circulation of coolant 3 in the cooling system 4. When this occurs, the pressure P in the pilot line 38 and in the space 49 and the ball 48 drops against the bottom of the space 49, whereby the passage through the valve 35 opens. This ensures that venting takes place after the engine has been stopped.
    I f1g. 5 and 6 show a perspective view with broken away parts 35 of the venting arrangement 5 according to an alternative embodiment of the invention. Fig. 5 shows the valve 35 in a venting position, i.e. when engine 2 is off and f1g. 6 shows the valve 35 when the engine is in operation and no venting takes place via the valve 35.
    The valve 35 differs from the valve 35 according to the embodiments in f1g. 3 and 4 show the design of the arrangement for setting the valve 35 in the operating position and the venting position, respectively. In the embodiments according to f1g. 3 and 4, the valve 35 is put into operating position by means of an overpressure P in the pilot line 38 which is propagated to the space 49. The embodiments according to f1g. 5 and 6, the valve is put into operating position by means of a pressure / lifting force P generated by the coolant 3 which, when filled, flows through the vent lines 37, 40 and further through a gap 50 between the ball 48 and an inner wall surface in the space 49 to a space 51 below the ball 48. When the coolant level in the space 51 rises, the ball 48 follows the coolant level upwards in the space 49 and closes the passage through the valve 35. This ensures that no venting takes place after the engine has been started. The spherical body is thus adapted so that the level of the sensing coolant 3 in the space 51 below the spherical body 47 and the closing connection between the first inlet 43 and the outlet 44 at times when the coolant 3 fills the space 51.
    When the cooling system is emptied of coolant, the space 51 is also emptied. When the sinker pressure P takes place, which results in the ball 48 sinking towards the bottom of the space 49, the passage through the valve 35 opening. This ensures that venting takes place when refilling coolant. The space is emptied via a drainage pipe 52, one end of which is connected to an outlet 53 at the lower area of the space 51. The drainage pipe 52 the other end is connected to the cooling system 4 in such a way that when the cooling system 4 is emptied of coolant 3, the space 51 is also emptied of coolant.
    At all times when the cooling system 4 is filled with coolant 3, it is important to evacuate air from the cooling system 4. When the coolant 3 is filled, the coolant level rises in the cooling system 4 and the coolant 3 flows through the vent lines 37,40. The space above the coolant level is occupied by air. This air is successively evacuated from the cooling system 4 via the open valve 35, the vent line 36 and the expansion tank 12 as the coolant level rises. When the coolant level rises in the cooling system 4, air is simultaneously evacuated from the part of the cooling system 4 as the cooling motor 2, via the vent line 16 to the expansion tank 12 and air from the cooler 8 via the vent line 17. Coolant 3 is filled in the cooling system 4 until a marked maximum level is reached in the expansion tank 12. the deaeration is completed and the lid 13 of the expansion tank 12 is screwed on.
    According to the invention, the valve 35 is closed when the engine is in operation to avoid continuous venting of the engine. In the embodiment according to Figs. 3 and 4, the valve 35 is in the closed position by means of an overpressure created during operation of the vehicle in the pilot line 38 which is propagated to the space 49 and pushes the ball 48 upwards into the space 49 so that it closes the passage through the valve 35. 5 and 6, the valve is set in the closed position by means of a pressure / lifting force generated by the cooling liquid 3 which, when filled, flows through the vent lines 37, 40 and further through a gap 50 between the ball 48 and an inner wall surface in the space 49 to a space 51 below the ball 48. Where it remains until the cooling system is drained of coolant.
    The invention is not limited to the described embodiments, but a number of possibilities for modifications thereof should be obvious to the person skilled in the art without departing from the basic idea of the invention as defined in the claims.
    权利要求:
    Claims (16)
    [1]
    Arrangement for venting at least one further cooling object (8,19,42) in a cooling system (4) for an internal combustion engine (2), in which cooling system (4) coolant (3) is circulated for cooling the engine (2) and the at least one further cooling object (8, 19), and which cooling system (4) comprises a cooler (8), a coolant pump (9) driven by a motor (2) arranged for circulating the coolant (3) and an expansion tank (12) for the coolant (3) to which venting of the motor (2) is intended to take place during operation of the motor (2), wherein a valve (35) is connected to the expansion tank (12), which valve is switchable between a first position when an air fl desert (F) can passing the through valve (35) to the expansion tank (12) for venting the at least one additional cooling object (8, 19) and a second position when an air gap (F) is prevented from passing through the valve (35) to the expansion tank (12), the valve (35) adapted to be set to the second position by means of a press (P) and return to the first position when the pressure (P) drops below a certain predetermined value when the motor is not in operation, characterized in that the valve (35) comprises a closing mechanism in the form of a spherical body (47) arranged in a space (49) of the valve (35) which spherical body (47) in the second position closes a connection between a first inlet (43) and an outlet (44) of the valve (35) and in the first position a connection between the first inlet (43) and the outlet (44).
    [2]
    Arrangement for venting at least one further cooling object (8, 19, 42) according to claim 1, characterized in that the spherical body (47) is arranged to rest against the bottom of the space (49) in the first position.
    [3]
    Arrangement for venting at least one further cooling object (8, 19, 42) according to claim 1, characterized in that the spherical body (47) is adapted to be set in the second position by means of a pressure (P) generated by the coolant ( 3) when refilling coolant (3).
    [4]
    Arrangement for venting at least one further cooling object (8, 19, 42) according to one of the preceding claims, characterized in that a gap (50) extends between the spherical body (47) and an inner wall surface in the space (49). ) to a space (51) 12 below the spherical body (47) through which gap (50) the coolant (3) flows to refill coolant (3).
    [5]
    Arrangement for venting at least one further cooling object (8, 19, 42) according to one of the preceding claims, characterized in that the spherical body is adapted to sense the level of the coolant (3) in the space (5 l) below the spherical body (47). and closing the connection between the first inlet (43) and the outlet (44) in the event that the coolant (3) fills the space (5 l).
    [6]
    Arrangement for venting at least one further cooling object (8, 19, 42) according to one of the preceding claims, characterized in that the valve (35) comprises an outlet (53) and in that the cooling system (4) is connected to the outlet (53) via drain line (52) so that when the cooling system (4) is emptied of coolant (3), the oven space (5 l) of coolant (3) is emptied.
    [7]
    Arrangement for deaeration of at least one further cooling object (8, 19,42) according to claim 1, characterized in that the valve (35) is adapted to be placed in the second layer by means of a pressure (P) altered by the coolant pump ( 9) when operating the engine (2)
    [8]
    Arrangement for venting at least one further cooling object (8, 19, 42) according to one of Claims 1, 2 or 7, characterized in that the valve (35) comprises a second inlet (45) and in that the coolant pump (9) is connected to the second inlet (45) via a pilot line (38) for pressure transmission.
    [9]
    Arrangement for venting at least one further cooling object (8, 19, 42) according to one of Claims 1, 2, 7 or 8, characterized in that the spherical body in the first layer rests against the second inlet (45) and in the the second valve closes the passage between the first inlet (43) and outlet (44) of the valve.
    [10]
    Arrangement for venting at least one further cooling object (8, 19, 42) according to one of the preceding claims, characterized in that venting is arranged to be activated in connection with refilling of coolant (3) in the cooling system (4). 13
    [11]
    Arrangement for venting at least one further cooling object (8,19,42) according to one of the preceding claims, characterized in that one or more vent lines (37,40,41) are connected to the valve (35).
    [12]
    Arrangement for venting at least one further cooling object (8,19,42) according to claim 11, characterized in that one first vent line (37) is connected for one year to an outlet of a retarder cooler (19) and its second end is connected to an inlet (43) of the valve (35) for venting the retarder cooler (19) to the expansion tank (12), the retarder cooler (19) constituting an additional cooling object (6) which is vented when the engine (2) is not in operation.
    [13]
    Arrangement for venting at least one further cooling object (8,19,42) according to claim 11, characterized in that one second vent line (40) is connected to an outlet of the cooler (8) for one second year and its second year is connected to one inlet. (46) of the valve (35) for venting the radiator (8) to the expansion tank (12), the radiator (8) constituting an additional cooling object (6) which is vented when the motor (2) is not in operation.
    [14]
    Arrangement for venting at least one further cooling object (8,19,42) according to claim 11, characterized in that one third venting line (41) is connected to the outlet of an EGR cooler (42) for one breath and its second breath is connected to it. an inlet of the valve (35) for venting the EGR cooler (42) to the expansion tank (12), the EGR cooler (42) constituting an additional cooling object (6) which is vented when the motor (2) is not in operation.
    [15]
    Internal combustion engine (2) comprising an arrangement for venting an additional cooling object according to any one of claims 1-14.
    [16]
    Vehicle (1) comprising an internal combustion engine (2) according to claim 15.
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    同族专利:
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    DE102016007705A1|2017-01-05|
    SE540892C2|2018-12-11|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1550961A|SE540892C2|2015-07-03|2015-07-03|Arrangement for venting a cooling object in a cooling system|SE1550961A| SE540892C2|2015-07-03|2015-07-03|Arrangement for venting a cooling object in a cooling system|
    DE102016007705.0A| DE102016007705A1|2015-07-03|2016-06-23|Device for venting a cooling object in a cooling system|
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