KR20200140114A - Apparatus for reducing the temperature of degasing gas - Google Patents

Abstract

The present invention relates to a degassing gas temperature reduction device for reducing the temperature of degassing gas sucked into a pressurized reservoir tank of a cooling system from a degassing gas generating source, which includes: an ejector having a first passage, a second passage having a diameter smaller than the diameter of the first passage, a third passage connected to the second passage, and a nozzle disposed between the first passage and the second passage; a first degassing hose connecting the degassing gas generating source and the first passage of the ejector; a second degassing hose connecting the pressurized reservoir tank and the second passage of the ejector; and a low-temperature coolant hose connecting a lower radiator hose in which a low-temperature coolant is transferred from a radiator of the cooling system to an engine and the third passage of the ejector.

Description

Temperature reduction device of degassing gas {APPARATUS FOR REDUCING THE TEMPERATURE OF DEGASING GAS}

The present invention relates to an apparatus for reducing the temperature of a degassing gas, and more particularly, of degassing gas sucked from a degassing gas generating source (radiator, engine side water jacket, turbocharger side water jacket, etc.) to a reservoir tank of a cooling system. It relates to a temperature reduction device for degassing gas to reduce the temperature.

In general, when a vehicle is operated, the explosion temperature in the engine combustion chamber reaches a high temperature of about 1500°C. If this is not properly cooled, there are problems such as damage to various parts including the engine due to engine overheating, decrease in lubricant viscosity and abnormal combustion, and as a result, the engine may become inoperable. Accordingly, a cooling system for cooling the engine is mounted on the vehicle.

The cooling system includes a water jacket formed with a cylinder block and cylinder head of the engine, a radiator fluidly connected to the water jacket, a heater that heats the air supplied to the vehicle by using the coolant heated in the water jacket, and the water jacket and the radiator. It includes a reservoir tank fluidly connected.

In addition, a turbocharger is disposed adjacent to one side of the engine, and the turbocharger rotates the turbine using the exhaust gas pressure of the engine, which inevitably occurs in the internal combustion engine, and then uses this rotational force to absorb the air that is stronger than atmospheric pressure. It is a device to increase output by pushing it with pressure.

On the other hand, the turbocharger may cause abnormal wear and seizure of bearings, etc. due to the heat of exhaust gas and the high rotational speed of the turbine. Accordingly, a water jacket is formed inside the turbocharger, and the water jacket of the turbocar is fluidly connected to the water jacket of the engine through the cooling water line of the engine.

In recent years, with the high performance of engines, there is a trend that the reservoir tank is being switched from the atmospheric opening type to the pressurized type, and the pressurized reservoir tank can maintain a constant internal pressure of the reservoir tank by a pressure cap mounted on the upper end thereof. In addition, the subscribed reservoir tank is directly connected to the water jacket of the engine and/or the water jacket of the turbocharger through a degasing line, so that the gas generated from the water jacket of the engine and/or the water jacket of the turbocharger is degassed. By being sucked into the reservoir tank through the gassing line, air can be effectively drained (degasing).

In particular, high-temperature gas may be generated in the water jacket of the turbocharger compared to the water jacket of the engine in the engine system, and thus, high-temperature degassing in which the high-temperature gas is sucked toward the reservoir tank may be mainly performed in the water jacket of the turbocharger.

In general, when the vehicle's starter is in a key-on state, the water pump of the cooling system circulates the coolant to cool the coolant in the radiator. Accordingly, the low-temperature coolant that has passed through the engine's water jacket is the water of the turbocharger. By entering the jacket, the turbocharger can be properly cooled.

However, when the vehicle's starter is in a key off state, the water pump of the cooling system does not operate, so the coolant does not circulate, and the coolant cannot be cooled by the radiator. As the coolant vaporizes due to the high temperature of the turbocharger, hot gas may be generated, and the high temperature gas generated from the water jacket of the turbocharger may be sucked into the reservoir tank through the degassing line due to a pressure difference. Hereinafter, the gas sucked into the reservoir tank through the degassing line is referred to as “degassing gas”. As the hot gas is sucked into the reservoir tank, the temperature of the coolant may exceed the maximum temperature of the coolant managed while the vehicle is running. For example, the maximum temperature of the coolant managed while the vehicle is running may be 110°C, but the temperature of the coolant in the key off state of the starter is far exceeding 110°C due to the hot gas sucked into the reservoir tank. It can rise close to 140°C.

As described above, there is a disadvantage that the high temperature degassing gas (that is, the high temperature gas in which the high temperature gas is sucked into the reservoir tank) deteriorates the pressurized reservoir tank in the key-off state of the starting device. For example, since the pressurized reservoir tank is manufactured with a maximum heat resistance temperature of 120°C, the temperature of the cooling water may rise near 140°C due to the high-temperature degassing gas, which may cause deterioration of the pressurized reservoir tank.

In addition, as the degassing gas of high temperature is sucked into the reservoir tank in the key-off state of the starting device, there is a disadvantage that bubble noise is caused in the pressurized reservoir tank.

The matters described in this background are prepared to enhance an understanding of the background of the invention, and may include matters other than those of the prior art known to those of ordinary skill in the field to which this technology belongs.

The present invention was devised in consideration of the above points, and reduces the temperature of the degassing gas sucked into the reservoir tank of the cooling system from the source of the degassing gas (radiator, engine side water jacket, turbocharger side water jacket, etc.) Its purpose is to provide a temperature reduction device for degassing gas.

An embodiment of the present invention for achieving the above object is a degassing gas temperature reduction device for reducing the temperature of the degassing gas sucked into the pressurized reservoir tank of the cooling system from the degassing gas generating source,

An ejector having a first passage, a second passage having a diameter smaller than the diameter of the first passage, a third passage connected to the second passage, and a nozzle disposed between the first passage and the second passage;

A first degassing hose connecting the degassing gas generating source and the first passage of the ejector;

A second degassing hose connecting the pressurized reservoir tank and the second passage of the ejector; And

It may include; a lower radiator hose through which the low-temperature coolant is transferred from the radiator of the cooling system to the engine and a low-temperature coolant hose connecting the third passage of the ejector.

The first passage and the second passage may be arranged to be connected in a line.

The third passage may have a diameter smaller than the diameter of the second passage.

The third passage may be disposed orthogonal to the second passage.

According to an example, the degassing gas generating source may be a turbo-side water jacket formed in a turbocharger.

According to another example, the degassing gas generation source may be any one of a radiator and an engine-side water jacket formed in the engine.

The lower radiator hose is communicatively connected to the engine side water jacket through a quick connector, and the quick connector has a main port communicating with the engine side water jacket and a nipple branching from the main port, and the low temperature cooling water hose One end may be hermetically coupled to the nipple.

According to the present invention, by reducing the temperature of the gas sucked into the reservoir tank of the cooling system from the degassing gas generating source (radiator, engine side water jacket, turbocharger side water jacket, etc.), the pressurized reservoir tank is deteriorated and Bubble noise, etc. can be effectively prevented.

1 is a diagram illustrating a cooling system for a vehicle to which an apparatus for reducing a temperature of a degassing gas according to an embodiment of the present invention is applied.
2 is a diagram illustrating a cooling system for a vehicle to which an apparatus for reducing a temperature of a degassing gas according to another embodiment of the present invention is applied.
3 is a perspective view showing a structure in which an apparatus for reducing the temperature of a de-improved gas according to an embodiment of the present invention is disposed in an engine and a turbocharger.
4 is an enlarged cross-sectional view of an arrow A of FIG. 3.
5 is an enlarged view of an arrow B portion of FIG. 4.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible even if they are indicated on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function obstructs an understanding of the embodiment of the present invention, a detailed description thereof will be omitted.

In describing the constituent elements of the embodiments of the present invention, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only used to distinguish the component from other components, and the nature, order, or order of the component is not limited by the term. In addition, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

1 and 2, the vehicle cooling system 10 includes an engine-side water jacket 11 formed inside the engine 1, a radiator 12 fluidly connected to the engine-side water jacket 11, and , A pressurized reservoir tank 13 fluidly connected to the radiator 12 and the engine-side water jacket 11, and a turbo-side water jacket 14 formed inside the turbocharger 2 adjacent to the engine 1, It may include a heater 15 fluidly connected to the engine-side water jacket 11.

The engine-side water jacket 11 may be formed on the cylinder block and the cylinder head of the engine 1, and the coolant supplied from the radiator 12 circulates the engine-side water jacket 11 to properly cool the engine 1 Can be.

The radiator 12 may fluidly communicate with the engine-side water jacket 11 through the lower radiator hose 21 and the upper radiator hose 22. Since the radiator 12 is disposed adjacent to the front grill of the vehicle, the radiator 12 may be cooled by outside air or the like, and a cooling fan (not shown) may be disposed adjacent to the rear side of the radiator 12. The low-temperature coolant cooled by the radiator 12 can be transferred to the engine-side water jacket 11 through the lower radiator hose 21, and the coolant can be heated as the coolant circulates through the engine-side water jacket 11. In addition, the heated coolant may be refluxed from the engine-side water jacket 11 to the radiator 12 through the upper radiator hose 22.

The pressurized reservoir tank 13 can fluidly communicate with the radiator 12 through the radiator side degassing line 23, and gas generated as the coolant is evaporated in the radiator 12, that is, the degassing gas. It can be sucked into the pressurized reservoir tank 13 through the radiator side degassing line 23. One end of the radiator-side degassing line 23 may be directly coupled to the top side of the pressurized reservoir tank 13, and the other end of the radiator-side degassing line 23 may be connected to the radiator 12 side. In particular, a position at which one end of the radiator-side degassing line 23 is coupled may be located higher than a set maximum water level of the cooling water accommodated in the pressurized reservoir tank 13.

The pressurized reservoir tank 13 can fluidly communicate with the vehicle cooling system 10 through the return hose 24, and thus the cooling water contained in the pressurized reservoir tank 13 can be refluxed to the vehicle cooling system 10. have. For example, the pressurized reservoir tank 13 may be fluidly connected to the engine-side water jacket 11 and/or the radiator 12, and the coolant stored in the pressurized reservoir tank 13 is transferred to the engine side through the return hose 24. It may be refluxed to the water jacket 11 and/or the radiator 12.

The pressurized reservoir tank 13 may have a pressure cap 13a at its upper end, and the pressure cap 13a may be configured to maintain a constant internal pressure of the pressurized reservoir tank 13.

The turbo-side water jacket 14 may be formed inside the turbocharger 2 adjacent to the engine 1, and the turbo-side water jacket 14 is formed through a pair of turbo-side connection passages 14a and 14b. It can fluidly communicate with the side water jacket 11 or the radiator 12.

Referring to FIG. 1, the turbo side water jacket 14 can fluidly communicate with the radiator 12 through a pair of turbo side connection passages 14a, 14b, and thus the turbo side water jacket 14 and The engine-side water jacket 11 is connected in parallel to the radiator 12.

Referring to FIG. 2, the turbo side water jacket 14 can fluidly communicate with the engine side water jacket 11 through a pair of turbo side connection passages 14a and 14b, and thus the turbo side water jacket ( 14) and the engine side water jacket 11 are connected in series to the radiator 12.

The turbo side water jacket 14 may be in fluid communication with the pressurized reservoir tank 13 through the turbo side degassing line 25. As the coolant is vaporized in the turbo-side water jacket 14, high-temperature gas may be generated, and the hot gas may be sucked into the pressurized reservoir tank 13 through the turbo-side degassing line 25.

The turbo side water jacket 14 may be in fluid communication with the pressurized reservoir tank 13 through the turbo side degassing lines 31 and 32. Gas generated as the coolant is vaporized in the turbo side water jacket 14 may be sucked into the pressurized reservoir tank 13 through the turbo side degassing lines 31 and 32.

The heater 15 may fluidly communicate with the engine-side water jacket 11 through a pair of connection passages 15a and 15b. Accordingly, the coolant is heated as it circulates through the engine-side water jacket 11, and at least a part of the heated coolant may flow into the heater 15.

The temperature reduction device 10 of the degassing gas according to an embodiment of the present invention reduces the temperature of the degassing gas sucked from the degassing gas generation source where the degassing gas is generated by evaporation of cooling water to the pressurized reservoir tank 13 side. Can be configured to Here, "degassing gas" refers to gas that is sucked into the pressurized reservoir tank 13 through the degassing line after being generated from the degassing gas generating source. The “degassing gas generating source” is a high-temperature gas, that is, degassing gas may be generated as the coolant is evaporated due to high surrounding heat, such as the radiator 12, the engine side water jacket 11, and the turbo side water jacket 14. Refers to the part that is present.

According to an embodiment, the turbo-side water jacket 14 due to high heat (high temperature) of the turbocharger 2 under a condition that coolant does not circulate in the vehicle cooling system 10, such as a key off of the ignition switch. Since a large amount of high-temperature gas may be generated within, the temperature reduction device 10 of the degassing gas may be disposed on the side of the turbo-side degassing lines 31 and 32 as shown in FIGS. 1 to 5.

1 to 5, the temperature reduction device 10 of the degassing gas is a first degassing hose 31 fluidly connected between the ejector 40, the turbo side water jacket 14, and the ejector 40. ), a second degassing hose 32 fluidly connected between the pressurized reservoir tank 13 and the ejector 40, and a low temperature cooling water hose fluidly connected between the lower radiator hose 21 and the ejector 40 (33) may be included.

As shown in FIG. 4, the ejector 40 includes a first passage 41, a second passage 42 having a smaller diameter than the first passage 41, and a third passage connected to the second passage 42. It may include a passage 43 and a nozzle 45 disposed between the first passage 41 and the second passage 42.

The first passage 41, the second passage 42, and the nozzle 45 may be connected in a row along the longitudinal direction of the ejector 40, and the third passage 43 may include the first passage 41 and the second passage. It may be connected to the second passage 42 so as to cross the two passages 42 at a predetermined angle. In particular, the third passage 43 may be connected to the second passage 42 so as to be orthogonal to the first passage 41 and the second passage 42. The second passage 42 may have a diameter smaller than the diameter of the first passage 41, and the third passage 43 may have a diameter equal to or slightly smaller than the diameter of the second passage 42.

The first degassing hose 31 may be configured to connect the turbo side water jacket 14 and the first passage 41 of the ejector 40. Accordingly, the high-temperature gas generated in the turbo side water jacket 14, that is, the high-temperature degassing gas can be sucked into the first passage 41 of the ejector 40 through the first degassing hose 31. .

The second degassing hose 32 may be configured to connect the pressurized reservoir tank 13 and the second passage 42. Accordingly, the high-temperature degassing gas may be sucked into the pressurized reservoir tank 13 through the second passage 42.

The first degassing hose 31 and the second degassing hose 32 are turbo-side degassing lines 31 and 32 that transfer the degassing gas generated in the turbo-side water jacket 14 to the pressurized reservoir tank 13. ) Can be configured.

The low temperature cooling water hose 33 may be configured to connect the lower radiator hose 21 and the third passage 43. The coolant cooled by the radiator 12 can be transferred to the engine-side water jacket 11 through the lower radiator hose 21, and the coolant at low temperature from the lower radiator hose 21 is the second passage of the ejector 40 The negative pressure generated in 42 may be sucked into the third passage 43 through the low temperature cooling water hose 33.

Referring to FIG. 5, the inlet of the engine-side water jacket 11 may be formed on one side wall of the engine 1, and the quick connector 50 may be coupled to the inlet side of the engine-side water jacket 11. . The lower radiator hose 21 may be communicatively connected to the engine-side water jacket 11 through a quick connector 50. The quick connector 50 may have a main port 51 communicating with the engine-side water jacket 11 and a nipple 53 branching from the main port 51. One end of the lower radiator hose 21 can be sealedly coupled to the main port 51 of the quick connector 50, and one end of the low temperature cooling water hose 33 is the nipple 53 of the quick connector 50. Can be hermetically bonded to As described above, since the low temperature coolant hose 33 is coupled to the nipple 53 of the quick connector 50 mounted on the engine 1, the low temperature coolant hose 33 can be easily assembled.

Looking specifically at the operation of the temperature reduction device 10 of the degassing gas configured as described above is as follows.

Under the condition that the cooling water does not circulate because the water pump of the cooling system does not operate, such as when the vehicle starter is keyed off, the cooling water remaining in the turbo side water jacket 14 is high heat of the turbocharger (high temperature). ) To generate high-temperature gas. The high temperature gas may flow into the first passage 41 of the ejector 40 through the first degassing hose 31 due to a pressure difference between the turbo side water jacket 14 and the pressurized reservoir tank 13. . In this way, the high-temperature gas flowing into the first passage 41 of the ejector 40, that is, the degassing gas, increases in speed while passing through the nozzle 45 and decreases the pressure, so that the negative pressure at the side of the second passage 42 decreases. In this case, the low temperature cooling water from the lower radiator hose 21 may be sucked into the second passage 42 of the ejector 40 through the low temperature cooling water hose 33 and the third passage 43. Accordingly, the high-temperature degassing gas and the low-temperature cooling water are mixed in the second passage 42, thereby reducing the temperature of the high-temperature degassing gas. For example, the temperature of the degassing gas sucked into the first passage 41 of the ejector 40 after being generated in the turbo side water jacket 14 in the key off state of the vehicle is approximately 140°C. The temperature of the cooling water passing through the lower radiator hose 21 is approximately 95°C, and the degassing gas is reduced to approximately 110°C as the cooling water is mixed in the second passage 42 of the ejector 40. I can.

According to the prior art, when a pressurized reservoir tank directly accommodates a high-temperature degassing gas of about 140℃, the material of the degassing hose was a reinforced heat-resistant hose capable of withstanding a temperature of up to 150℃ in consideration of its heat resistance. The material of the reservoir tank was PA66 (nylon series). Accordingly, the material cost is relatively high, and PA66 has a disadvantage in that it is difficult to visually identify the amount of cooling water or the water level of the cooling water accommodated in the pressurized reservoir tank due to its low transparency due to its material properties.

On the other hand, in the present invention, the high-temperature degassing gas generated in the turbo side water jacket 14 can be reduced by the low-temperature cooling water on the second passage 42 of the ejector 40, so the second degassing hose 32 ) May be composed of an inexpensive general heat-resistant hose capable of withstanding temperatures of up to 120°C, and the material of the pressurized reservoir tank 13 may also be composed of an inexpensive general PP material. For this reason, compared to the prior art, the present invention can significantly reduce the material cost, and since the PP material has a relatively high transparency due to its material properties, the pressurized reservoir tank can be configured to be transparent, through which the pressurized reservoir tank There is an advantage in that it is easy to visually identify the amount of cooling water received.

In addition, in the case of high-end vehicles, an electric water pump was added, and the cooling water was circulated in the cooling system by driving the electric water pump for a certain period of time after turning off the ignition switch. In contrast, in the present invention, since the temperature of the degassing gas can be reduced by inhaling the low-temperature cooling water using the energy of the degassing gas, there is no need to install a separate electric water pump, and a pressurized reservoir tank according to the high performance of the engine. Considering the application of, the manufacturing cost can be greatly reduced.

According to the present invention, the apparatus 10 for reducing the temperature of the degassing gas is configured to reduce the temperature of the hot degassing gas that is sucked into the pressurized reservoir tank 13 after being generated from the turbo side water jacket 14. Although exemplified and described as applied to the gassing lines 31 and 32, the present invention is not limited thereto, and high temperature degassing gas or engine-side water sucked into the pressurized reservoir tank 13 after being generated in the radiator 12 It is applicable to the radiator side degassing line or the engine side degassing line to reduce the high temperature degassing gas that is sucked into the pressurized reservoir tank 13 after being generated in the jacket 11. That is, the source of degassing gas is not limited only to the turbo side water jacket 14, but various parts such as the radiator 12 and the engine side water jacket 11 can generate high-temperature degassing gas due to vaporization of the coolant. I can.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention.

Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

1: engine 2: turbocharger
10: Vehicle cooling system 11: Engine side water jacket
12: radiator 13: pressurized reservoir tank
13a: pressure cap 14: turbo side water jacket
14a, 14b: connection passage 15: heater
21: lower radiator hose 22: upper radiator hose
23: radiator side degassing line 24: connecting hose
30: temperature reduction device of atmospheric sink gas
31: first degassing hose 32: second degassing hose
33: low temperature cooling water hose 40: ejector
41: first passage 42: second passage
43: third passage 45: nozzle
50: quick connector 51: main port
53: nipple

Claims (7)

As a temperature reduction device for degassing gas that reduces the temperature of degassing gas sucked into the pressurized reservoir tank from the degassing gas generation source of the vehicle cooling system
An ejector having a first passage, a second passage having a diameter smaller than the diameter of the first passage, a third passage connected to the second passage, and a nozzle disposed between the first passage and the second passage;
A first degassing hose connecting the degassing gas generating source and the first passage of the ejector;
A second degassing hose connecting the pressurized reservoir tank and the second passage of the ejector; And
A lower radiator hose through which the low-temperature coolant is transferred from the radiator of the cooling system to the engine and a low-temperature coolant hose connecting the third passage of the ejector; The method according to claim 1,
The temperature reduction device of the degassing gas disposed so as to connect the first passage and the second passage in a line. The method according to claim 2,
The third passage is a temperature reducing device of the degassing gas having a diameter smaller than the diameter of the second passage. The method according to claim 2,
The third passage is a temperature reducing device of the degassing gas disposed to be orthogonal to the second passage. The method according to claim 1,
The degassing gas generation source is a temperature reduction device for a degassing gas which is a turbo-side water jacket formed in a turbocharger. The method according to claim 1,
The degassing gas generation source is any one of the radiator and an engine-side water jacket formed in the engine. The method according to claim 1,
The lower radiator hose is communicatively connected to the engine side water jacket through a quick connector, and the quick connector has a main port communicating with the engine side water jacket and a nipple branching from the main port, and the low temperature cooling water hose A device for reducing the temperature of a degassing gas in which one end is hermetically coupled to the nipple.

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