KR20180068225A - Engine system having coolant control valve - Google Patents

Abstract

The present invention relates to a coolant control valve unit, and an engine system having the same. The engine system having the coolant control valve unit according to an embodiment of the present invention may comprise: an engine in which a cylinder head is disposed on a cylinder block; a first coolant demanded by the coolant discharged from the cylinder head; a coolant control valve unit; and an actuator arranged to drive the coolant control valve unit. The coolant control valve unit is arranged to control the coolant discharged from a first coolant consumer and to supply the coolant to a coolant inlet side of the cylinder block. The coolant control valve unit controls the coolant discharged from a coolant outlet of the cylinder block, receives the coolant discharged from the cylinder head, and distributes the coolant to a second coolant consumer.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling water control valve unit,

The present invention relates to a cooling water control valve unit, and an engine system having the cooling water control valve unit, each of which controls cooling water to be distributed to cooling elements that require cooling water, increases cooling performance, and improves control accuracy of cooling water.

The engine generates torque by combustion of the fuel, and the remainder is discharged as thermal energy. Particularly, the cooling water circulates the engine, the heater, and the radiator, absorbing the heat energy, and discharging the heat energy to the outside.

If the cooling water temperature of the engine is low, the viscosity of the oil becomes high, the friction force increases, fuel consumption tends to increase, the temperature of the exhaust gas slowly rises, the catalyst activation time becomes longer, . In addition, the time for normalization of the function of the heater becomes long, so that the passenger and the driver can be cold.

If the cooling water temperature of the engine is excessive, knocking occurs, and the performance may be deteriorated by adjusting the ignition timing in order to suppress the knocking. Further, if the temperature of the lubricating oil is excessive, the lubricating action may be deteriorated.

Accordingly, a single cooling water control valve for controlling a plurality of cooling elements through a single valve, such as a specific portion of the engine, maintains the temperature of the cooling water at a high level and the other portion is kept at a low level.

On the other hand, a technique in which one cooling water control valve unit controls the cooling water passing through the radiator, the heater core, the isothermal cooler, the oil cooler, or the cylinder block is studied, and the structure of the cooling water control valve unit Studies are being conducted together.

A single cooling water control valve unit can be used to control the cooling water to be distributed to more cooling elements (radiator, heater core, idle cooler, oil cooler, etc.) and improve cooling performance.

As a prior art document, Japanese Patent Laid-Open Publication No. 2015-59615.

On the other hand, there is an outlet control method for installing the cooling water control valve unit on the cooling water discharge passage side of the cylinder head, and an inlet control method for installing the cooling water control valve unit on the cooling water inlet side of the cylinder block. The cooling water discharged from the cylinder block is transmitted to the cooling water control valve unit side in order to control the cooling water discharged from the cylinder block so that the cooling capacity of the radiator is lowered, The cooling performance may be deteriorated.

The matters described in the background section are intended to enhance the understanding of the background of the invention and may include matters not previously known to those skilled in the art.

An object of the present invention is to provide a cooling water control valve unit which can control the cooling water entering the cooling water inlet side of the cylinder block and the cooling water discharged from the cylinder head and the cylinder block respectively to improve the control accuracy of the cooling water temperature, And an engine system having the same.

A cooling water control valve unit according to an embodiment of the present invention includes: a first rotary valve having a pipe type in which at least one first cooling water passage is formed at a position set from an inner peripheral surface to an outer peripheral surface, a first rotary valve disposed coaxially with the first rotary valve, A second rotary valve in which at least one second cooling water passage is formed at a position set as an outer peripheral surface in an inner peripheral surface of a pipe type, the first rotary valve and the second rotary valve are rotatably arranged, And a valve housing to which a connection line is connected at a set position corresponding to the first and second cooling water passages, and an actuator arranged to rotate the first and second rotary valves in the valve housing have.

The portions of the first and second rotary valves opposed to the first and second rotary valves may be closed and the opposite sides thereof may be opened.

And a rotating shaft disposed on the rotational center axis of the first rotary valve and the second rotary valve for connecting the first and second rotary valves, and the actuator can be arranged to rotate the rotating shaft .

A worm wheel gear formed on the rotating shaft, and a worm gear external to the worm wheel gear, and the actuator may be arranged to rotate the worm gear to rotate the first and second rotary valves.

An engine system having a cooling water control valve unit according to an embodiment of the present invention includes an engine in which a cylinder head is disposed on a cylinder block, a first cooling water demanding person supplied with cooling water discharged from the cylinder head, And controls the cooling water discharged from the cooling water outlet of the cylinder block to be supplied with the cooling water discharged from the cylinder head and supplies the cooling water to the second cooling water demanding place A cooling water control valve unit for distributing the cooling water, and an actuator arranged to drive the cooling water control valve unit.

Wherein the cooling water control valve unit includes a first unit arranged to control cooling water discharged from the first cooling water consumer and to supply cooling water to a cooling water inlet side of the cylinder block, and a second unit arranged to control cooling water discharged from a cooling water outlet of the cylinder block And a second cooling water control valve unit for receiving the cooling water discharged from the cylinder head and distributing the cooling water to the second cooling water demanding unit.

The first cooling water consumer may include an oil cooler for heat exchange with oil or an oil cooler for heat exchange with the recirculated exhaust gas.

The second cooling water consumer may include a heater core that is heat-exchanged with the indoor air of the vehicle, or a radiator that exchanges heat with the outside air.

The second cooling water consumer and the cooling water discharged from the first cooling water control valve unit may be supplied to the cooling water inlet side of the cylinder block.

And a cooling water pump arranged to pump cooling water to the cooling water inlet side of the cylinder block.

A part of the cooling water supplied to the cylinder block may be distributed to the cylinder head side, and the rest may pass the cylinder block.

Wherein the cooling water control valve unit comprises a first rotary valve having a pipe type and at least one first cooling water passage formed at a position set to an outer peripheral surface from an inner peripheral surface thereof and a second rotary valve disposed coaxially with the first rotary valve, And a second rotary valve in which at least one second cooling water passage is formed at a position where the first and second rotary valves are opposed to each other, and a portion of the first and second rotary valves facing the first and second rotary valves is closed, The first rotary valve and the second rotary valve are rotatably disposed and the valve housing is connected to both ends of the open ends of the first and second rotary valves and to the predetermined positions corresponding to the first and second cooling water passages, .

And a rotating shaft disposed on the rotational center axis of the first rotary valve and the second rotary valve for connecting the first and second rotary valves, and the actuator can be arranged to rotate the rotating shaft .

A worm wheel gear formed on the rotating shaft, and a worm gear external to the worm wheel gear, and the actuator may be arranged to rotate the worm gear to rotate the first and second rotary valves.

The cooling water discharged through the one end opening of the first rotary valve is connected to the cooling water inlet side of the cylinder block, and the inlet opened at the tee end of the second rotary valve is supplied with cooling water discharged from the cylinder head .

And a controller for controlling the actuator according to the cooling water temperature to control the cooling water flowing through the cylinder block, the first cooling water consumer, and the second cooling water consumer, respectively.

According to the present invention for achieving these objects, it is possible to control the cooling water discharged from the outlet side of the engine and the cooling water entering the inlet side by using one cooling water control valve unit, respectively, The overall cooling efficiency can be improved.

Further, the cooling water passing through the cylinder block can be controlled, and the cooling water passing through the cylinder head can be controlled to improve the cooling efficiency.

In addition, the cooling water control valve unit can be installed regardless of the positions of the inlet side and the outlet side of the engine, thereby improving the overall layout.

1 is a schematic configuration diagram of an engine system having a cooling water control valve unit according to an embodiment of the present invention.
2 is a schematic cross-sectional view of a cooling water control valve unit according to an embodiment of the present invention.
3 is a schematic diagram showing the overall flow of cooling water in a first condition in an engine system having a cooling water control valve unit according to an embodiment of the present invention.
4 is a schematic diagram showing the overall flow of cooling water in a second condition in an engine system having a cooling water control valve unit according to an embodiment of the present invention.
5 is a chart showing cooling water ON in the third condition and the fourth condition in the engine system having the cooling water control valve unit according to the embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

It is to be understood, however, that the present invention is not limited to the illustrated embodiments, and that various changes and modifications may be made without departing from the spirit and scope of the invention. .

In order to clearly illustrate the embodiments of the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the entire specification.

In the following description, the names of the components are denoted by the first, second, etc. in order to distinguish them from each other because the names of the components are the same and are not necessarily limited to the order.

1 is a schematic configuration diagram of an engine system having a cooling water control valve unit according to an embodiment of the present invention.

Referring to FIG. 1, the engine system includes a cylinder head 100, a cylinder block 110, an easy alum cooler 120, an oil cooler 130, a coolant pump 140, a heater core 150, A radiator 160, a cooling water control valve unit 170 and a control unit 190. The cooling water control valve unit 170 includes an actuator 173, a first unit 171, and a second unit 172, .

The cylinder head 100 is disposed on the cylinder block 110 and the cooling water pump 140 pumps cooling water to the cooling water inlet side of the cylinder block 110.

The cooling water pumped by the cooling water pump 140 is pumped to the cooling water inlet side formed on one side of the cylinder block 110 and a part of the pumped cooling water moves to one side of the cylinder head 100.

The cooling water flows through the cylinder block 110 and the cylinder head 100 and can be discharged to the cooling water outlet side formed on the other side of the cylinder head 100 and the cylinder block 110.

Cooling water discharged from a cooling water outlet of the cylinder head 100 is distributed to the oil cooler 130 and the idle cooler 120. Then, the cooling water is supplied to the cooling water inlet side of the second unit 172.

The cooling water discharged from the cooling water outlet formed on the other side of the cylinder block 110 is supplied to the second unit 172 and the cooling water supplied to the second unit 172 flows through the heater core 150, And may be supplied to the radiator 160, respectively.

The second unit 172 receives the cooling water discharged from the cylinder block 110 and the cylinder head 100 and controls the cooling water discharged from the cylinder block 110, The cooling water can be always supplied from the cooling water supply source.

The second unit 172 can control the cooling water supplied to the heater core 150 and the radiator 160, respectively.

The first unit 171 can control the cooling water discharged from the oil cooler 130 and the easy al cooler 120 and the cooling water outlet of the first unit 171 can control the cooling water discharged from the coolant pump 140, So that the cooling water can be transferred to the cooling water pump 140. [

The controller 190 can simultaneously control the first unit 171 and the second unit 172 according to the cooling water ON through the actuator 173. [

The control unit 190 controls the oil cooler 130, the idle al cooler 120, the cylinder block 110, the radiator 160, and the heater core 160 through the cooling water control valve unit 170. [ And the cooling water passing through the heat exchanger 150 can be controlled.

As described above, cooling water inlet and cooling water outlet are formed at both ends of the cooling water control valve unit 170, respectively. Here, the cooling water inlet is formed at the outer end of the second unit 172, and the cooling water outlet is formed at the outer end of the first unit 171.

The controller 190 according to an exemplary embodiment of the present invention may be implemented as one or more microprocessors that operate according to a set program. The set program may include a series of methods for performing the method and the inspection according to an embodiment of the present invention Command.

The oil cooler 130, the idle cooler 120, the cylinder head 100, the cylinder block 110, the coolant pump 140, the heater core 150, and the radiator 160 ), Reference is made to the prior art.

2 is a schematic cross-sectional view of a cooling water control valve unit according to an embodiment of the present invention.

2, the cooling water control valve unit 170 includes main components such as an actuator 173, a worm gear 202, a worm wheel gear 204, a rotating shaft 200, a first rotary valve 221, 2 rotary valve 222, a first cooling water passage 231, a second cooling water passage 232, a cooling water inlet 212, a cooling water outlet 211, and a valve housing 210.

The first rotary valve 221 has a pipe shape, and a first cooling water passage 231 opened from the inner circumferential surface to the outer circumferential surface is formed at a predetermined position. The second rotary valve 222 has a pipe shape disposed coaxially with the first rotary valve 221 and a second cooling water passage 232 opened from the inner circumferential surface to the outer circumferential surface is formed at a predetermined position.

A portion of the first and second rotary valves 221 and 222 facing the first and second rotary valves 221 and 222 is closed and the one end of the first rotary valve 221 and the second rotary valve 221, And the other end of the movable member 222 is opened. That is, a cooling water outlet 211 is formed at one end of the first rotary valve 221 and a cooling water inlet 212 is formed at the other end of the second rotary valve 222.

The rotary shaft 200 is disposed on the rotational central axis of the first and second rotary valves 221 and 222 and rotates together with the first and second rotary valves 221 and 222 . A worm wheel gear 204 is disposed at a center portion in the longitudinal direction of the rotating shaft 200, and the worm gear 202 is circumscribed by the worm wheel gear 204.

The actuator 173 is arranged to rotate the worm gear 202 and the actuator 173 is connected to the worm gear 202 through the worm wheel 204 and the rotary shaft 200, 1,2 rotary valves 221, 222, respectively.

The first and second rotary valves 221 and 222 are rotatably disposed within the valve housing 210 and the first and second cooling water passages 231 and 232 formed in the first and second rotary valves 221 and 222, (Not shown) are connected to the valve housing 210 in correspondence with the openings of the first and second rotary valves 221 and 222 at both ends of the valve housing 210, A cooling water outlet and a cooling water inlet are respectively formed.

The first one of the first cooling water passages formed in the first rotary valve 221 is configured to control cooling water discharged from the idle al cooler 120 and the second is configured to control the cooling water discharged from the oil cooler 130 .

The first one of the second cooling water passages 232 formed in the second rotary valve 222 is configured to control the cooling water supplied to the heater core 150 and the second one is configured to control the cooling water discharged from the cylinder block 110 And the third is configured to control the cooling water discharged to the radiator 160. [

The cooling water outlet 211 formed at one end of the first rotary valve 221 and the valve housing 210 discharges cooling water to the cooling water inlet side of the cylinder block 110, (212) receives cooling water from the cooling water discharge side of the cylinder head (100).

3 is a schematic diagram showing the overall flow of cooling water in a first condition in an engine system having a cooling water control valve unit according to an embodiment of the present invention.

3, the coolant pump 140 pumps the coolant at a first condition (warm condition: coolant temperature is 90 degrees or less and higher than 40 degrees), and the coolant is pumped through the cylinder block 110 And supplies the cooling water to the cylinder head (100).

The cooling water control valve unit 170 supplies cooling water discharged from the cylinder head 100 to the heater core 150 and circulates the cooling water discharged from the oil cooler 130 and the easy- .

The cooling water outlet side of the cylinder block 110 is blocked by the cooling water control valve unit 170 and does not flow the cooling water along the cylinder block 110. In addition, the cooling water control valve unit 170 does not distribute cooling water to the radiator 160.

4 is a schematic diagram showing the overall flow of cooling water in a second condition in an engine system having a cooling water control valve unit according to an embodiment of the present invention.

4, the cooling water pump 140 pumps the cooling water in the second condition (hot condition: cooling water temperature is 105 degrees or less and higher than 90 degrees), and the cooling water is pumped through the cylinder block 110 And supplies the cooling water to the cylinder head (100).

The cooling water control valve unit 170 supplies the cooling water discharged from the cylinder head 100 to the heater core and circulates the cooling water discharged from the oil cooler 130 and the easy aluminum cooler 120.

The cooling water outlet side of the cylinder block 110 is blocked by the cooling water control valve unit 170 and does not flow the cooling water along the cylinder block 110. In addition, the cooling water control valve unit 170 distributes cooling water to the radiator 160.

5 is a chart showing cooling water ON in the third condition and the fourth condition in the engine system having the cooling water control valve unit according to the embodiment of the present invention.

5, the cooling water control valve unit 170 is configured to cool the cooling water discharged from the cylinder head 100 to the heater core 150 (cooling condition: cold water temperature not higher than 40 degrees Celsius) under the third condition And cut off the discharge side of the oil cooler 130 and the idle cooler 120.

In addition, the cooling water outlet side of the cylinder block 110 is blocked by the cooling water control valve unit 170 and does not flow the cooling water along the cylinder block 110. In addition, the cooling water control valve unit 170 does not distribute cooling water to the radiator 160.

5, in the fourth condition (superheat condition: cooling water temperature is higher than 105 degrees), the cooling water pump 140 pumps the cooling water and supplies the cooling water to the cylinder head 100 through the cylinder block 110 Cooling water is supplied.

The cooling water control valve unit 170 supplies cooling water discharged from the cylinder head 100 to the heater core 150 and circulates the cooling water discharged from the oil cooler 130 and the easy- .

The cooling water outlet side of the cylinder block 110 is opened by the cooling water control valve unit 170 to flow cooling water along the cylinder block 110. The cooling water control valve unit 170 is connected to the radiator 160, To distribute the cooling water.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And all changes to the scope that are deemed to be valid.

100: cylinder head 110: cylinder block
120: Easy Al cooler 130: Oil cooler
140: coolant pump 150: heater core
160: Radiator 170: Cooling water control valve unit
173: Actuator 171: First unit
172: the second unit

Claims (17)

A first rotary valve having a pipe type in which at least one first cooling water passage is formed at a position set to an outer peripheral surface from an inner peripheral surface;
A second rotary valve disposed coaxially with the first rotary valve and having at least one second cooling water passage formed at a position set to an outer peripheral surface at an inner peripheral surface in a pipe type;
Wherein the first rotary valve and the second rotary valve are rotatably disposed, and both the open ends of the first and second rotary valves and the valve to which the connection line is connected at a set position corresponding to the first and second cooling water passages, housing; And
An actuator disposed in the valve housing to rotate the first and second rotary valves;
Wherein the cooling water control valve unit comprises: The method according to claim 1,
Wherein a portion of the first and second rotary valves facing the first and second rotary valves is closed and an opposite side thereof is opened. The method according to claim 1,
A rotary shaft disposed on a rotation center axis of the first rotary valve and the second rotary valve and connecting the first and second rotary valves;
And wherein the actuator is arranged to rotate the rotating shaft. The method of claim 3,
A worm wheel gear formed on the rotating shaft; And
A worm gear external to the worm wheel gear;
Wherein the actuator is arranged to rotate the worm gear to rotate the first and second rotary valves. An engine in which a cylinder head is disposed on a cylinder block;
A first cooling water demanded by the cooling water discharged from the cylinder head;
A cooling water discharge control unit for controlling the cooling water discharged from the first cooling water consumer and supplying cooling water to the cooling water inlet side of the cylinder block,
A cooling water control valve unit for controlling the cooling water discharged from the cooling water outlet of the cylinder block, receiving the cooling water discharged from the cylinder head, and distributing the cooling water to the second cooling water demand site; And
An actuator arranged to drive the cooling water control valve unit; And a cooling water control valve unit 6. The method of claim 5,
The cooling water control valve unit includes:
A first unit arranged to control cooling water discharged from the first cooling water consumer and to supply cooling water to a cooling water inlet side of the cylinder block; And
A second cooling water control valve unit for controlling the cooling water discharged from the cooling water outlet of the cylinder block, receiving the cooling water discharged from the cylinder head, and distributing the cooling water to the second cooling water demanding place;
And a cooling water control valve unit for cooling the engine. The method according to claim 6,
The first cooling water demanding entity,
An oil cooler that is heat-exchanged with the oil, and an idle cooler that is heat-exchanged with the recirculated exhaust gas. The method according to claim 6,
And the second cooling water demanding entity,
And a radiator that exchanges heat with indoor air of a vehicle or with a heater core that is heat-exchanged with indoor air of the vehicle or outdoor air. The method according to claim 6,
Wherein the second cooling water demanding unit and the cooling water discharged from the first cooling water control valve unit are supplied to a cooling water inlet side of the cylinder block. 10. The method of claim 9,
A cooling water pump arranged to pump cooling water to a cooling water inlet side of the cylinder block;
And a cooling water control valve unit for cooling the engine. 10. The method of claim 9,
Wherein a part of the cooling water supplied to the cylinder block is distributed to the cylinder head side and the rest passes the cylinder block. The method according to claim 6,
The cooling water control valve unit includes:
A first rotary valve having a pipe type in which at least one first cooling water passage is formed at a position set to an outer peripheral surface from an inner peripheral surface;
A second rotary valve disposed coaxially with the first rotary valve and having at least one second cooling water passage formed at a position set to an outer peripheral surface at an inner peripheral surface in a pipe type; And
Wherein the first rotary valve and the second rotary valve are rotatably disposed, and both the open ends of the first and second rotary valves, and the valve housing in which the connection line is connected at a set position corresponding to the first and second cooling water passages, ;
And a cooling water control valve unit for cooling the engine. 13. The method of claim 12,
A rotary shaft disposed on a rotation center axis of the first rotary valve and the second rotary valve and connecting the first and second rotary valves; Lt; / RTI >
And the actuator is arranged to rotate the rotating shaft. 14. The method of claim 13,
A worm wheel gear formed on the rotating shaft; And
A worm gear external to the worm wheel gear; Lt; / RTI >
Wherein the actuator is arranged to rotate the worm gear to rotate the first and second rotary valves. 14. The method of claim 13,
The cooling water discharged through the one open end of the first rotary valve is connected to the cooling water inlet side of the cylinder block,
And an inlet opened at the tee end of the second rotary valve is supplied with cooling water discharged from the cylinder head. 14. The method of claim 13,
A controller for controlling the actuator according to the cooling water temperature to control the cooling water flowing through the cylinder block, the first cooling water consumer, and the second cooling water consumer; And a cooling water control valve unit for cooling the engine. 13. The method of claim 12,
Wherein a portion of the first and second rotary valves facing the first and second rotary valves is closed and an opposite side of the first and second rotary valves is opened.

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