KR101305690B1 - All-in-one thermostat and device for circulating cooling water for cooling retarder - Google Patents

Abstract

In the present invention, the coolant discharged from the engine installed at the end of the engine flows in, and flow paths through which the coolant flows are formed separately, thereby discharging the coolant introduced from the engine to the retarder and cooling water used for retarder cooling. The thermostat assembly is introduced, and the thermostat valve is provided in a part of the flow path to discharge the coolant to the radiator side or bypass the engine to the radiator according to the temperature of the coolant flowed from the retarder; Thermostat is introduced.

Description

Coolant circulation mechanism and integrated thermostat for retarder {ALL-IN-ONE THERMOSTAT AND DEVICE FOR CIRCULATING COOLING WATER FOR COOLING RETARDER}

The present invention relates to a retarder cooling water circulation mechanism for reducing the number of parts required for retarder cooling, reducing the weight and production cost of the vehicle, improving vehicle productivity, and simplifying the layout of the cooling pipe.

In general, in the case of a large truck or a bus, the self-load is very large, and therefore, a normal brake acting directly on the wheels has a limit in braking performance, and there is a fear that a vapor lock or a fade phenomenon may occur.

Accordingly, an auxiliary brake device capable of decelerating a vehicle without using the brake pedal is used. Such auxiliary brakes include an engine brake, an eddy current brake, a hydrodynamic brake brake, and an air resistance deceleration brake.

Among these, the hydro-dynamic brake is an auxiliary brake, also called a retarder. The hydro-dynamic brake is used to grab the power shaft inside the transmission using viscous friction of the fluid and transform the power into thermal energy to obtain braking performance.

Therefore, in order to maintain the protection and braking performance of the transmission, it is equipped with a separate cooling device for cooling the thermal energy of the retarder converted into braking energy, which sends the coolant from the engine to the retarder to cool the working fluid. Hot-type cooling can be applied.

1 is a view showing a cooling circuit of a retarder according to the prior art, the first thermostat (2) having a simple water passage function is installed in the cooling outlet port (1a) of the engine (1), the engine (1) The cooling water introduced from the discharge to the retarder (3). Then, the coolant introduced into the retarder 3 flows into the second thermostat 4 installed on the vehicle side after performing the cooling function of the operating fluid.

At this time, when the temperature of the coolant is higher than the reference temperature in the second thermostat (4), the valve in the second thermostat (4) is opened to send the coolant to the radiator (5) for cooling and then flows into the engine, and the temperature is lower than the reference temperature. In the low case, the valve in the second thermostat 4 is kept closed to bypass the cooling water to the water pump 6 to flow into the engine 1.

However, in the above-described conventional technology, since the first and second thermostats for cooling the retarder are separately installed on the engine and the vehicle side, the weight and production cost of the vehicle are increased due to the increase in the number of parts. In addition, there is also a problem that increases the work process according to the individual assembly for each part to hinder the productivity of the vehicle.

In addition, since the second thermostat is separately mounted away from the engine, the layout of the cooling pipe connected to the second thermostat has also been complicated.

It should be understood that the foregoing description of the background art is merely for the purpose of promoting an understanding of the background of the present invention and is not to be construed as an admission that the prior art is known to those skilled in the art.

The present invention has been made to solve the conventional problems as described above, by reducing the number of parts required for retarder cooling to reduce the weight and production cost of the vehicle, the retarder cooling water circulation mechanism and integrated thermostat to improve the vehicle productivity To provide.

The present invention provides a retarder cooling water circulation mechanism and an integrated thermostat designed to simplify the layout of a cooling pipe by integrating a cooling water passage for retarder cooling.

The configuration of the present invention for achieving the above object, the cooling water discharged from the engine is installed at the end of the engine flows in, the flow paths through which the cooling water flows are formed separately, and discharges the cooling water introduced from the engine to the retarder In addition, the cooling water used for cooling the retarder is introduced, the thermostat valve is provided in a portion of the flow path to discharge the cooling water to the radiator side or bypass the engine side according to the temperature of the cooling water introduced from the retarder; It may be characterized in that the configuration.

The thermostat assembly is provided to communicate with the cooling water discharge port of the engine, the first port into which the cooling water discharged from the engine is introduced; A second port provided to communicate with the first port and discharging the cooling water introduced into the first port to the retarder side; A third port provided at one side of the second port and into which cooling water used for retarder cooling is introduced; A fourth port provided to be in communication with the third port by the thermostat valve when the temperature of the cooling water introduced from the third port is equal to or higher than the reference temperature, and discharging the cooling water introduced into the third port to the radiator side for cooling; And a fifth port provided to be in communication with the third port by the thermostat valve when the temperature of the cooling water introduced from the third port is lower than the reference temperature, thereby bypassing and discharging the cooling water introduced into the third port to the engine side. Can be.

A portion of the flow path provided between the third port and the fifth port may be formed to surround a portion of the flow path provided between the first port and the second port.

The second port and the third port may be formed to face the same direction.

The present invention through the above-described problem solving means, the circulation and the direction of the coolant is made together by the thermostat assembly made of a single body, the installation of a thermostat installed separately in the vehicle for changing the direction of the coolant bar, Rita By reducing the number of parts used for cooling, the production cost and weight of the vehicle can be reduced, and the assembly process for each part can be simplified to improve the productivity of the vehicle.

In addition, since the coolant used for cooling the retarder is introduced and discharged by the thermostat assembly, a separate space of the cooling pipe for connecting with the thermostat installed in the vehicle is not necessary, thereby increasing the space efficiency inside the engine room and the thermostat. Maintenance of the stat assembly is also convenient.

1 is a view showing a retarder cooling circuit according to the prior art.
2 is a view showing a retarder cooling circuit using a thermostat assembly in the present invention.
Figure 3 is a view showing the coupling configuration of the thermostat assembly according to the present invention.
4 to 8 is a view showing a cooling water circulation configuration for each port in the thermostat assembly according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 to 8, the coolant circulation mechanism for the retarder of the present invention illustrated in FIGS. 2 to 8 is installed at an end of the engine 10 so that the coolant discharged from the engine 10 is introduced, and the ports into which the coolant is introduced and discharged are respectively distinguished. The cooling water introduced from the engine 10 is discharged to the retarder 30, and a thermostat valve 26 is provided therein to discharge the cooling water introduced from the retarder 30 to the radiator 40 according to the temperature. Or it may be configured to include a thermostat assembly 20 to bypass and discharge to the engine 10 side.

That is, as shown in FIGS. 2 and 3, the thermostat assembly 20 serves as a passage through which the coolant introduced from the engine 10 flows into and out of the retarder 30, and also flows from the retarder 30. By performing the role of a valve for discharging the coolant to the radiator 40 or the engine 10 side according to the temperature of the coolant, the existing first thermostat and the second thermostat are integrated.

Therefore, by designing a structure integrated with the first thermostat provided on the end side of the engine 10 without separately installing the second thermostat on the vehicle side, the cost required for installing the second thermostat is reduced, and the vehicle It is possible to reduce the weight of, and simplify the assembly process of the above-mentioned parts.

The thermostat assembly 20 of the present invention shown in Figures 4 to 8 is provided so as to communicate with the cooling water discharge port 11 of the engine 10, the first port (2) into which the coolant discharged from the engine 10 is introduced ( 21 and a second port 22 provided to communicate with the first port 21 and discharging the cooling water introduced into the first port 21 to the retarder 30 side, and the second port 22. It is provided on one side of, the temperature of the third port 23 and the cooling water introduced from the third port 23, the cooling water used for cooling the retarder 30, the thermostat valve 26 The fourth port 24 provided to communicate with the third port 23 by discharging the cooling water introduced into the third port 23 toward the radiator 40, and flowing from the third port 23. When the temperature of the cooled coolant is less than the reference temperature, the thermostat valve 26 is provided to communicate with the third port 23, thereby cooling the coolant introduced into the third port 23. Gene 10, may be configured side to the fifth port 25, which by-pass to exhaust.

That is, the thermostat assembly 20 is provided with each of the first port 21 to the fifth port 25 so as to serve as an outlet for the inflow and outflow of the cooling water, and the flow paths provided between the respective ports are separated from each other. By being formed, the flow of the cooling water required for cooling the retarder 30 may be integrated in the thermostat assembly 20.

Thus, in addition to the above-described structure of the first port 21 to the fifth port 25, first port 21 is provided on one side of the thermostat assembly 20, the engine 10 It is configured to communicate with the cooling water discharge port 11 formed at the upper end of one end.

The second port 22 is provided toward the front of the thermostat assembly 20, is connected to the retarder 30 by a cooling pipe, and discharges the coolant introduced from the first port 21 to the retarder 30. do.

The third port 23 is provided toward the front of the thermostat assembly 20, and the cooling water used for cooling the retarder 30 is connected to the retarder 30 by a cooling pipe in the thermostat assembly 20. Inflow.

The fourth port 24 is provided toward the front of the thermostat assembly 20 and is connected to the radiator 40 by a cooling pipe to discharge the coolant introduced through the third port 23 to the radiator 40. .

The fifth port 25 is provided toward the lower side of the thermostat assembly 20 and connected to the water pump 50 side by the cooling pipe to radiate the cooling water introduced through the third port 23 to the radiator 40. Bypass to the engine 10 side without going through.

In this case, a thermostat valve 26 is installed inside the flow path provided between the third port 23, the fourth port 24, and the fifth port 25, and the thermostat valve 26 is formed of a first thermostat valve 26. The cooling water is diverted to the fourth port 24 or the fifth port 25 according to the temperature of the cooling water introduced from the three ports 23 and discharged.

In addition, the structure of the first port 21 to the fifth port 25 configured as described above is only a preferable example for implementing the present invention, the installation of the above-described port according to the internal structure of the engine room and the mounting position of the parts The location may be changed as appropriate.

For example, in the present invention, the third port 23 and the fourth port 24 are provided above the first port 21 and the second port 22, but their arrangement and structure may be appropriately changed. will be.

Meanwhile, as shown in FIG. 8, in the present invention, a part of the flow path formed between the third port 23 and the fifth port 25 may be a part of the flow path formed between the first port 21 and the second port 22. It may be configured in a wrapping shape.

That is, the flow path formed between the first port 21 and the second port 22 is provided in the front-rear direction of the lower portion of the thermostat assembly 20, and is formed between the third port 23 and the fifth port 25. The flow path is provided side by side in the front-rear direction of the upper portion of the thermostat assembly 20 and continues in the downward direction of the thermostat assembly 20 via the side surface of the flow path between the first port 21 and the second port 22. .

At this time, the cooling water passing through the flow path between the third port 23 and the fifth port 25 is a relatively low temperature cooling water below the reference temperature. Therefore, the coolant flowing in the retarder 30 through the flow path between the first port 21 and the second port 22 and the low temperature cooling water bypassed from the third port 23 to the fifth port 25 and By the heat exchange is made, it is possible to further increase the cooling efficiency of the retarder (30).

As illustrated in FIG. 3, the second port 22 and the third port 23 may be formed to face the same direction. That is, the second port 22 is a passage for discharging the coolant to the retarder 30, and the third port 23 is the coolant used to cool the retarder 30 again in the thermostat assembly 20. As an inflow passage, both the second port 22 and the third port 23 are configured to be connected to the retarder 30, and thus cooling for connecting the retarder 30 and the thermostat assembly 20 is performed. The layout of the pipes can be simplified.

On the other hand, the cooling water circulation mechanism of the present invention may be a thermostat formed integrally, the thermostat may be composed of first to fifth ports.

4 to 8 will be described in detail the operation and effect of the present invention.

The cooling water discharged from the cooling water discharge port 11 of the engine 10 is introduced into the thermostat assembly 20 through the first port 21. As such, the introduced cooling water is discharged through the second port 22 and introduced into the retarder 30, and the cooling water introduced into the retarder 30 performs cooling of the retarder 30, and then, the third port. It is introduced back to the thermostat assembly 20 through (23).

Subsequently, the temperature of the coolant flowing into the third port 23 is determined by the thermostat valve 26, and when the temperature is higher than the reference temperature, cooling is required, and the cooling water is discharged through the fourth port 24 to the radiator 40. When the temperature is lower than the reference temperature, cooling is unnecessary. The cooling water is discharged through the fifth port 25, bypassed to the water pump 50, and discharged through the fourth port 24 and the fifth port 25. Is again used to cool the engine 10, and thus the circulation of the coolant is made.

As described above, the thermostat assembly 20 of the present invention is installed at one end of the engine 10 and serves as a passage through which the coolant introduced from the engine 10 flows into and out of the retarder 30. According to the temperature of the cooling water introduced in 30) is selected to the radiator 40 or the engine 10 side to integrally configured to perform the role of the valve to discharge together.

That is, since the circulation and direction of the coolant is made together through the thermostat assembly 20 of the present invention, it is unnecessary to install a thermostat installed separately in the vehicle for changing the direction of the existing coolant, and thus the retarder 30 The number of parts used for cooling can be reduced. Therefore, it is possible to reduce the production cost and weight of the vehicle by reducing the number of parts, and to improve the productivity of the vehicle by simplifying the assembly process for each component.

In addition, the present invention consists of a structure in which the coolant is sent from the thermostat assembly 20 to the retarder 30, and the coolant used for cooling the retarder 30 flows back into the thermostat assembly 20. As such, the separate space of the cooling pipe to be connected to the thermostat installed separately in the vehicle is not necessary, thereby increasing the space efficiency inside the engine room, and the maintenance of the thermostat assembly 20 is facilitated.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the specific embodiments set forth herein; rather, .

10 engine 11 coolant outlet
20: thermostat assembly 21: first port
22: second port 23: third port
24: 4th port 25: 5th port
30: retarder 40: radiator
50: water pump

Claims (6)

The first port 21 installed at the end of the engine 10 and the coolant flowing from the engine 10 are discharged to the retarder 30 so that the coolant discharged from the engine 10 flows into the retarder 30. 30) The coolant used for cooling flows into the radiator according to the temperatures of the second port 22 and the third port 23 configured to have flow paths through which the coolant flows, and the coolant introduced from the retarder 30. Thermostat assembly 20 comprising a fourth port 24 and the fifth port 25, the thermostat valve 26 is installed in a portion of the flow path to discharge to the 40 or bypassed to the engine 10 side ; Is composed,
The thermostat assembly 20,
The first port 21 is installed to communicate with the cooling water discharge port 11 of the engine 10 so that the cooling water discharged from the engine 10 is introduced;
The second port (22) is installed in communication with the first port (21) to discharge the coolant flowing into the first port (21) to the retarder (30) side;
The third port 23 is installed at one side of the second port 22 so that the coolant used to cool the retarder 30 flows in;
When the temperature of the cooling water introduced from the third port 23 is greater than or equal to the reference temperature, the fourth port 24 discharges the cooling water introduced into the third port 23 toward the radiator 40 to cool the thermostat. It is installed to communicate with the third port 23 by the valve 26;
When the temperature of the cooling water introduced from the third port 23 is less than the reference temperature, the fifth port 25 bypasses and discharges the cooling water introduced into the third port 23 to the engine 10 side. It is installed to communicate with the third port 23 by the stat valve 26,
A part of the flow path provided between the third port 23 and the fifth port 25 is formed in a shape that surrounds a part of the flow path provided between the first port 21 and the second port 22. Cooling water circulation mechanism for more. delete delete The method according to claim 1,
The second port (22) and the third port (23) is a retarder cooling water circulation mechanism, characterized in that formed to face the same direction. The first port 21 installed at the end of the engine 10 and the coolant flowing from the engine 10 are discharged to the retarder 30 so that the coolant discharged from the engine 10 flows into the retarder 30. 30) The coolant used for cooling flows into the radiator according to the temperatures of the second port 22 and the third port 23 configured to have flow paths through which the coolant flows, and the coolant introduced from the retarder 30. Thermostat assembly 20 comprising a fourth port 24 and the fifth port 25, the thermostat valve 26 is installed in a portion of the flow path to discharge to the 40 or bypassed to the engine 10 side ; Is composed,
The thermostat assembly 20,
The first port 21 is installed to communicate with the cooling water discharge port 11 of the engine 10 so that the cooling water discharged from the engine 10 is introduced;
The second port (22) is installed in communication with the first port (21) to discharge the coolant flowing into the first port (21) to the retarder (30) side;
The third port 23 is installed at one side of the second port 22 so that the coolant used to cool the retarder 30 flows in;
When the temperature of the cooling water introduced from the third port 23 is greater than or equal to the reference temperature, the fourth port 24 discharges the cooling water introduced into the third port 23 toward the radiator 40 to cool the thermostat. It is installed to communicate with the third port 23 by the valve 26;
When the temperature of the cooling water introduced from the third port 23 is less than the reference temperature, the fifth port 25 bypasses and discharges the cooling water introduced into the third port 23 to the engine 10 side. It is installed to communicate with the third port 23 by the stat valve 26,
A part of the flow path provided between the third port 23 and the fifth port 25 is formed in a shape that surrounds a portion of the flow path provided between the first port 21 and the second port 22. Thermostat. delete

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