KR20130031540A - Cooling system for vehicle, and control method thereof - Google Patents

Abstract

The present invention relates to a vehicle cooling system for controlling the water pump mounted on the vehicle to control the cooling water to circulate, the present invention is to pass the cooling water through the engine and to circulate the cooling water passing through the engine through the respective circulation paths of the vehicle Water pump for; A valve for regulating the flow of cooling water passing through the circulation paths by external control; And an engine control unit configured to control the valve so that the coolant flowing through the engine and flowing into the valve in response to the state of the blower fan from among the vehicle information provided from the outside is discharged or cut off to the circulation paths. do. As a result, the present invention can replace the thermostat of the conventional vehicle cooling system, and appropriately control the flow of the cooling water in response to the running state and environmental conditions of the vehicle to optimize the cooling efficiency and improve fuel efficiency.

Description

Cooling system for vehicle, and control method thereof

The present invention relates to a vehicle cooling system, and more particularly, to a vehicle cooling system that can be applied to a general gasoline / diesel vehicle, a hybrid vehicle, an electric vehicle, and a fuel cell vehicle to control the flow of cooling water.

The vehicle cooling system manages temperature to ensure that each part of the vehicle runs stably. Thermostats commonly used in automotive cooling systems control the coolant flow by varying the port area with temperature.

However, the conventional thermostat type vehicle cooling system is limited in the cooling system route that is controlled and controlled in accordance with a fixed temperature, it is difficult to control according to the situation, there is a problem that loss occurs in the cooling side. This problem makes it difficult to control effectively according to the driving state of the vehicle, which also disadvantages in terms of fuel efficiency.

KR 10-2002-0058889 A, July 12, 2002, drawing 2

An object of the present invention is to replace the thermostat of the conventional vehicle cooling system, and to control the flow of coolant appropriately in response to the driving conditions and environmental conditions of the vehicle to optimize the cooling efficiency and improve fuel economy for the vehicle To provide.

The present invention for achieving the above object relates to a vehicle cooling system for controlling the water pump mounted on the vehicle to control the cooling water to circulate, the vehicle cooling system, the flow of the cooling water passing through the circulation paths by external control A valve for regulating it; And an engine control unit configured to control the valve so that the coolant flowing through the engine and flowing into the valve in response to the state of the blower fan from among the vehicle information provided from the outside is discharged or cut off to the circulation paths. do.

On the other hand, the present invention for achieving the above object is an engine for controlling the valve by obtaining a vehicle information in conjunction with a valve for controlling the flow of cooling water passing through each circulation path of the vehicle, and an external electronic device mounted on the vehicle The control method of the vehicle cooling system having a control unit, the control method of the vehicle cooling system, when the engine is turned on (ON), the engine control unit is turned on (ON) / off (OFF) of the blower fan Determining a state of the blower fan; And when the blower fan is turned off and the coolant temperature of the vehicle information is smaller than a first predetermined water temperature value, the coolant flowing through the engine into the valve is transferred to the circulation paths. It characterized in that it comprises a; mode 1 control step of controlling the valve so as not to leak.

As such, the vehicle cooling system according to the present invention replaces the thermostat with a controllable valve and organically controls the flow of the coolant according to the vehicle driving environment conditions, thereby increasing cooling efficiency and reducing friction. Therefore, fuel economy can be improved.

1 is a block diagram of a vehicle cooling system according to an embodiment of the present invention.
2 is an exploded perspective view of a valve according to an embodiment of the present invention.
3 is a cross-sectional view of the valve illustrated in FIG. 2 in a coupled state.
4 is a block diagram illustrating an engine control unit according to an embodiment of the present invention.
5 is a schematic diagram illustrating a mode 1 control module according to an embodiment of the present invention.
6 is a schematic diagram illustrating a mode 2 control module according to an embodiment of the present invention.
7 is a schematic diagram illustrating a mode 3 control module according to an embodiment of the present invention.
8 is a schematic diagram illustrating a mode 4 control module according to an embodiment of the present invention.
9 is a schematic diagram illustrating a mode 5 control module according to an embodiment of the present invention.
10 is a schematic diagram illustrating a mode 6 control module according to an embodiment of the present invention.
11 is a schematic diagram illustrating a mode 7 control module according to an embodiment of the present invention.
12 is a control procedure diagram of a vehicle cooling system according to an embodiment of the present invention.

Hereinafter, a vehicle cooling system and a control method thereof according to an embodiment of the present invention will be described with reference to the accompanying drawings.

A vehicle cooling system 1 according to an embodiment of the present invention will be described with reference to FIG. 1. 1 is a block diagram of a vehicle cooling system according to an embodiment of the present invention.

As shown in FIG. 1, the vehicle cooling system 1 according to the present exemplary embodiment may be divided into a water pump 10, a valve 40, and an engine control unit 50 in connection with the circulation of the cooling water. The engine control unit 50 may control the valve 40 by a communication line or a voltage controller separately provided.

The water pump 10 is controlled by the engine control unit 50 and serves as a driving source for passing the coolant through the engine and circulating the coolant passing through the engine through the vehicle circulation paths D1, D2, and D3. do.

The first circulation path D1 is a line through which the coolant passing through the engine circulates through the valve 40 and the heater core 20, and circulates through the second circulation path D2 valve 40 and the oil warmer 30. The third circulation path D3 is a line circulating through the valve 40 and the radiator 35.

The valve 40 is controlled by the engine control unit 50 and regulates the flow of coolant passing through the circulation paths D1, D2, and D3. Hereinafter, the valve 40 will be described with reference to FIGS. 2 and 3 by way of example.

As shown in FIG. 2, the valve 40 may include a branch pipe 41 and a rotary valve body 42. The branch pipe 41 may include a first circulation path D1, a second circulation path D2, and a second circulation path D42. 3 circulation path (D3) is connected. As shown in FIG. 3, the rotary valve body 42 may be inserted into the branch pipe 41.

The valve 40 may be selectively communicated with or blocked from each of the circulation paths D1, D2, and D3 connected to the branch pipe 41 by the rotation of the rotary valve body 42 by the rotation of the rotary valve body 42. have.

The engine control unit 50 passes through the engine in response to the vehicle information provided from the external electronic device mounted on the vehicle so that the coolant flowing into the valve 40 flows out or shuts off to the circulation paths D1, D2, and D3. 40 is controlled.

That is, as shown in FIG. 4, the engine control unit 50 includes the mode 1 control module 52, the mode 2 control module 54, the mode 3 control module 55, the mode 4 control module 56, and the mode 5. Seven control modules may be provided, such as the control module 57, the mode 6 control module 58, and the mode 7 control module 59.

When the blower fan is turned off and the coolant temperature of the vehicle information is smaller than the predetermined first water temperature value C0, the mode 1 control module 52 passes through the engine and enters the valve 40. 5, the valve 40 is controlled so as not to flow into the circulation paths D1, D2, and D3.

As such, the mode 1 control module 52 may reduce engine friction by performing fast warm-up of the coolant by blocking all ports at the outlet of the valve 40 when the coolant temperature is low, thereby improving fuel economy.

When the blower fan is turned on and the coolant temperature of the vehicle information is smaller than the predetermined first water temperature value C0, the mode 2 control module 54 passes through the engine and flows into the valve 40. As shown in FIG. 6, the valve 40 is controlled to flow out to the first circulation path D1 passing through the heater core 20.

As such, the mode 2 control module 54 may secure the heating performance by opening the heater side when the cooling water temperature is low and the room heating condition.

Mode 3 control module 55 is the blower fan is turned off (OFF), the cooling water temperature of the vehicle information is more than the first predetermined water temperature (C0) or less than the predetermined second water temperature (C1), Figure 7 As shown in FIG. 3, the valve 40 is controlled such that the coolant introduced into the valve 40 flows out into the second circulation path D2 passing through the oil warmer 30.

In this way, the mode 3 control module 55 can improve fuel economy by reducing the friction of the transmission by warming up the oil warmer 30 when the cooling water temperature reaches a predetermined temperature.

Mode 4 control module 56 is when the blower fan is turned on (ON) and the coolant temperature of the vehicle information is greater than or equal to a predetermined first water temperature (C0) and less than a predetermined second water temperature (C1), FIG. As shown in FIG. 8, the valve 40 is discharged into the first circulation path D1 passing through the heater core 20 and the second circulation path D2 passing through the oil warmer 30 as shown in FIG. 8. ).

As such, the mode 4 control module 56 may improve fuel economy by reducing transmission friction by opening the oil warmer 30 side and the heater core 20 side when the cooling water temperature reaches a predetermined temperature and then heats the room. Can be.

When the blower fan is turned off and the coolant temperature is equal to or greater than the second water temperature value C1, the mode 5 control module 57 may cool the oil introduced into the valve 40 as shown in FIG. 9. The valve 40 is controlled to flow into the second circulation path D2 passing through the second circulation path D3 and the third circulation path D3 passing through the radiator 35.

Here, the flow rate of the coolant flowing into the third circulation path D3 is not controlled by opening the valve 40 entirely, but is adjusted by proportionally controlling the valve 40.

As such, the mode 5 control module 57 may secure the safety of the vehicle by cooling the oil and the cooling water when the cooling water temperature is high to improve the overall cooling performance.

When the blower fan is turned on and the coolant temperature is greater than or equal to the second water temperature value C1, the mode 6 control module 58, as shown in FIG. 10, the coolant flowing into the valve 40 is the heater core 20. The valve 40 is controlled to flow out to the first circulation path D1 passing through) and the second circulation path D2 passing through the oil warmer 30 and the third circulation path D3 passing through the radiator 35.

Here, the flow rate of the coolant flowing into the third circulation path D3 is not controlled by opening the valve 40 entirely, but is adjusted by proportionally controlling the valve 40.

As described above, the mode 6 control module 58 activates circulation of the heater core 20 side, the oil warmer 30 side, and the radiator 35 side when the cooling water temperature is high and the room heating condition is secured. At the same time, the overall cooling performance of the vehicle can be maintained.

When the engine is turned off, the mode 7 control module 59 opens the valve 40 so that the coolant flowing into the valve 40 flows out to all of the circulation paths D1, D2, and D3 as shown in FIG. 11. To control. With respect to the control of the valve 40 of the third circulation path D3, the proportional control is not performed like the mode 5 control module 57 and the mode 6 control module 58, and the overall open control is performed.

As such, the mode 7 control module 59 may open all the routes when the engine is OFF to prevent local temperature rise of the cooling system.

Hereinafter, an operation of the vehicle cooling system 1 according to an exemplary embodiment of the present invention will be described with reference to FIG. 12. Duplicate contents as above are omitted.

The control method of the vehicle cooling system according to the present embodiment is made by the engine control unit 50 which controls the valve 40 by acquiring vehicle information in cooperation with an electronic device mounted on the vehicle.

When the vehicle key is turned on, the engine control unit 20 determines whether the blower fan, which determines whether the blower fan is on or off, is turned on or off. If it is determined that the OFF (S110), the coolant temperature of the acquired vehicle information is less than the first water temperature value (C0) (S120), the coolant flowing into the valve 40 through the engine to the circulation path ( The valve 40 is controlled so as not to flow out to D1, D2, and D3 (S125). This control procedure may be performed by the mode 1 control module 52.

In addition, when the cooling water temperature is greater than the first water temperature value and less than the predetermined second water temperature value by the steps S120 and S130, the engine control unit 50 may cool the water introduced into the valve 40 by the oil warmer 30. The valve 40 is controlled to flow to the second circulation path D2 passing through the valve 40 (S135). This control procedure may be performed by the mode 3 control module 55.

On the other hand, when the conditions of steps S120 and S130 are not satisfied, the engine control unit 50, that is, when the coolant temperature is equal to or greater than the second water temperature value C1, the coolant flowing into the valve 40 is the second circulation path. The valve 40 is controlled to flow out to the third circulation path D3 passing through the D2 and the radiator 35 (S137). This control procedure may be performed by the mode 5 control module 57.

When the engine is turned off (S128), the valve 40 is opened to be controlled so that the coolant flowing into the valve 40 flows out to all of the circulation paths D1, D2, and D3 (S129).

On the other hand, when the blower fan is turned on (ON), the engine control unit 50, when the coolant temperature is less than the first water temperature value (C0) (S140), the coolant flowing into the valve 40 The valve 40 is controlled to flow out to the first circulation path D1 passing through the heater core 20 (S145). This control procedure may be performed by the mode 2 control module 54.

When the cooling water temperature is greater than or equal to the first water temperature value and smaller than a predetermined second water temperature value (S150), the engine control unit 50 may include the first circulation path D1 and the first cooling water introduced into the valve 40. 2, the valve 40 is controlled to flow out to the circulation path D2 (S155). This control procedure may be performed by the mode 4 control module 56.

On the other hand, when the conditions of steps S140 and S150 are not satisfied, the engine control unit 50, that is, when the coolant temperature is greater than or equal to the second water temperature value, the coolant introduced into the valve 40 may be the first circulation path D1. And the valve 40 to be discharged to the second circulation path D2 and the third circulation path D3. This control procedure can be performed by the mode 6 control module 58.

As such, the vehicle cooling system 1 according to the exemplary embodiment of the present invention is a control logic of the system in which the thermostat is replaced with the controllable valve 40. Not only can it be increased, but fuel efficiency can be improved by reducing friction. For example, the fuel efficiency improvement may be 1.5% in the FTP CITY (25 degrees) mode, which is an authorized fuel efficiency certification mode, and 2.0% in the low temperature region.

1: vehicle cooling system 10: water pump
20: heater core 30: oil warmer
35: radiator 40: valve
41: branch pipe 42: rotary valve body
42a: inlet 50: engine control unit
52: Mode 1 Control Module 54: Mode 2 Control Module
55: mode 3 control module 56: mode 4 control module
57: Mode 5 Control Module 58: Mode 6 Control Module
59: Mode 7 Control Module

Claims (18)

A water pump for passing the coolant through the engine and circulating the coolant passing through the engine through respective circulation paths of the vehicle;
A valve for regulating the flow of cooling water passing through the circulation paths by external control; And
An engine control unit controlling the valve so that the coolant flowing through the engine and flowing into the valve in response to the state of the blower fan from the vehicle information provided from the outside is discharged or blocked to the circulation paths;
Vehicle cooling system comprising a. The method of claim 1,
The engine control unit, when the blower fan is off (OFF) and the coolant temperature of the vehicle information is less than a first predetermined water temperature value, the coolant flowing through the engine to the valve to the circulation paths Vehicle control system comprising a mode 1 control module for controlling the valve so as not to leak. The method of claim 1,
The engine control unit, when the blower fan is turned on (ON) and the coolant temperature of the vehicle information is less than the first predetermined water temperature value, the coolant flowing through the engine into the valve of the circulation paths And a mode 2 control module for controlling the valve to flow to the first circulation path passing through the heater core. The method of claim 1,
The engine control unit, when the blower fan is off (OFF) and the cooling water temperature of the vehicle information is more than the first predetermined water temperature value and less than the second predetermined water temperature value, passing through the engine to the valve And a mode 3 control module for controlling the valve so that the introduced cooling water flows out to the second circulation passage passing through the oil warmer among the circulation passages. The method of claim 1,
The engine control unit, when the blower fan is turned on (ON) and the cooling water temperature of the vehicle information is greater than a first predetermined water temperature value and smaller than a second predetermined water temperature value, the engine passes through the valve And a mode 4 control module for controlling the valve so that the cooling water introduced into the circulation path flows out of the first circulation path through the heater core and the second circulation path through the oil warmer. The method of claim 1,
The engine control unit, when the blower fan is turned off (OFF) and the cooling water temperature of the vehicle information is more than a second predetermined water temperature value, the coolant flowing through the engine into the valve oil of the circulation paths And a mode 5 control module for controlling the valve to flow out of the second circulation passage passing through the warmer and the third circulation passage passing through the radiator. The method according to claim 6,
Cooling water flow rate flowing into the third circulation path is adjusted by proportionally controlling the valve. The method of claim 1,
The engine control unit, when the blower fan is turned on (ON) and the coolant temperature of the vehicle information is more than a second predetermined water temperature value, the coolant flowing through the engine into the valve heater of the circulation path And a mode 6 control module for controlling the valve to flow out of the first circulation passage through the core, the second circulation passage through the oil warmer, and the third circulation passage through the radiator. 9. The method of claim 8,
The mode 6 control module is a vehicle cooling system, characterized in that for controlling the flow rate of the coolant flowing out to the third circulation path by controlling the valve proportionately. The method according to any one of claims 1 to 9,
The engine control unit includes a mode 7 control module for controlling the valve so that the coolant flowing into the valve when the engine is turned off (OFF) to the all of the circulation paths. The method of claim 1,
The engine control unit controls the valve by a communication line, or the vehicle cooling system, characterized in that for controlling the valve by a separate voltage controller. Control of the cooling system for a vehicle having a valve for controlling the flow of cooling water passing through each circulation path of the vehicle, and an engine control unit for controlling the valve by acquiring vehicle information in conjunction with an external electronic device mounted on the vehicle In the method,
A status determination step of the blower fan, in which the engine control unit determines whether the blower fan is on / off when the engine is on; And
When the blower fan is turned off and the coolant temperature of the vehicle information is smaller than a first predetermined water temperature value, the engine control unit flows into the circulation paths through the engine. A mode 1 control step of controlling the valve so as not to
Control method of a vehicle cooling system comprising a. The method of claim 12,
When the blower fan is turned off and the coolant temperature of the vehicle information is greater than or equal to the first water temperature and less than a second predetermined water temperature value, the coolant flowing into the valve is connected to the circulation paths. And a mode 3 control step of controlling the valve to flow out of the second circulation passage passing through the oil warmer. The method of claim 13,
A third circulation path through which the coolant flowing into the valve passes through the second circulation path and a radiator among the circulation paths when the blower fan is turned off and the cooling water temperature is equal to or greater than the second water temperature value. And a mode 5 control step of controlling the valve to flow out of the vehicle. The method of claim 12,
The engine control unit further comprises a mode 7 control step of controlling the valve so that the coolant flowing into the valve when the engine is turned off (OFF) to all of the circulation paths, the control of the vehicle cooling system Way. The method of claim 12,
The engine control unit, when the blower fan is turned on (ON) and the cooling water temperature is less than the first predetermined water temperature value, the cooling water flowing into the valve passes through the heater core of the circulation passages And a mode 2 control step of controlling the valve to flow out. 17. The method of claim 16,
If the engine control unit is the blower fan is turned on (ON) and the cooling water temperature is greater than the first water temperature value and less than a second predetermined water temperature value, the coolant flowing into the valve is the first circulation path and the And a mode 4 control step of controlling the valve to flow to the second circulation passage passing through the oil warmer among the circulation passages. 18. The method of claim 17,
When the blower fan is turned on and the coolant temperature is equal to or greater than the second water temperature, the engine control unit passes through the radiator among the first and second circulation paths and the circulation paths. And a mode 6 control step of controlling the valve to flow to the third circulation path.

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