KR101403309B1 - Exhaust gas recirculation flux control valve for vehicles - Google Patents

Abstract

The present invention relates to an automatic flow control valve for an automobile, and more particularly, to a valve control device for an automobile, which comprises a valve body (30) provided with an intake port (31) opened to allow exhaust gas to flow into a lower end thereof and an exhaust port (32) A valve 40 which is connected to the lower end of the valve 40 and whose upper end passes through the upper end of the valve body 30 and which extends outward from the upper end of the valve body 30; (50), and an actuator (60) connected to the upper end of the shaft (50) extending to the outside and axially rotating the shaft (50). Accordingly, since the actuator including the shaft is not affected by the pressure of the exhaust gas, the actuator can be applied to a relatively small and inexpensive actuator, thereby reducing the cost, The structure of the valve becomes a circular cup structure in which the structure of the valve is concaved upward from below, so that the upper end of the valve is connected to the shaft with the upper end extended to the upper end of the intake port, thereby shortening the length of the shaft connected to the valve. The overall size of the valve can be made compact and the cost can be reduced. Further, by providing the cooling means for cooling the valve body, it is possible to prevent the component damage due to the high temperature of the exhaust gas, The reliability of the product can be improved. And to obtain a.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas recirculation valve,

More particularly, the present invention relates to an automatic flow control valve for an automobile. More particularly, the present invention relates to an automatic flow control valve for an automobile, and more particularly, And the exhaust port can be partly opened and closed in a manner that the valve is opened and closed by rotating the valve so that the exhaust gas can be smoothly supplied while controlling the suction flow rate of the exhaust gas, And the valve has a circular cup structure in which the structure of the valve is concaved upwardly from below, so that the upper end of the valve is connected to the shaft in a state extending to the upper end of the intake port, whereby the length of the shaft connected to the valve is shortened, It is possible to reduce the cost of the valve body, The present invention relates to a flow control valve for an automobile which can improve the durability of a valve and improve the reliability of a product by providing cooling means for cooling the valve so as to prevent damage to components due to high temperature of the exhaust gas.

In general, exhaust gas recirculation (EGR) for internal combustion engines refers to a device that enables effective control of nitrogen oxides (NO _x ) in a variety of exhaust gas reduction technologies aimed at environmentally friendly engines.

The study of engine for automobile has developed with social phenomenon, and recently, three factors of fuel economy, environment and safety have been developed uniformly. As interest in the environment has increased worldwide, improvement measures for air pollution are being discussed And regulations on automobile exhaust gas are being implemented in earnest.

On the other hand, the EGR apparatus is one of the most effective methods for reducing nitrogen oxides. This is because the inert gas such as carbon dioxide of the exhaust gas is substituted with a part of the intake air to increase the heat capacity of the mixer, The temperature rise of the gas is suppressed, and the excess air ratio is lowered to suppress the generation of thermal nitrogen oxides, thereby reducing the total amount of nitrogen oxides.

In addition, since a portion of the intake air is replaced with an exhaust gas having a low oxygen concentration, oxygen in the combustion chamber is reduced, and therefore, the generation of nitrogen oxides is suppressed. As a result, the IZI device greatly reduces the load of the NOx reduction reaction in the catalytic converter do.

In addition, since the nitrogen oxide reduction effect of the diesel engine is different from that of the gasoline engine, the gasoline engine efficiently cools the combustion flame because the isgar gas is uniformly mixed with the fuel mixture. On the other hand, Is spatially restricted in cooling the combustion flame because the fuel gas mixture is spatially very uneven.

Therefore, the theory that the nitrogen oxide reduction mechanism of the diesel engine is reduced by reducing the oxygen concentration of the combustion air is strongly suggested, rather than the explanation that the ignition gas lowers the combustion temperature, such as the gasoline engine, Studies are continuing to do so.

As shown in FIGS. 1 and 2, an intake valve (not shown) for introducing exhaust gas into a combustion chamber (not shown) is installed at a lower end of the intake valve A seat ring 9 disposed at a lower end portion of the intake port 7a of the valve body 7 and a valve seat 7 disposed inside the valve body 7 for driving the motor 5 The rotary gear 10 is screwed with the rotary gear 10 and is lifted up and down in accordance with the forward and reverse rotation of the rotary gear 10, And a shaft 20 provided with a valve plate 22 for closely opening and closing the intake port 7a of the valve body 7 while being spaced apart.

According to the above-described configuration, the prior art Easy Valve operates in conjunction with the rotation of the rotary gear 10 in the valve body 7 when the drive gear 5a of the motor 5 rotates to open the intake port 7a And the shaft 20 threadedly engaged with the rotary gear 10 is lowered to open the inlet port 7a.

However, since the above-described prior art IGV valve for an automobile is lowered in the direction opposite to the exhaust gas pressure direction which is upwardly pressed toward the valve plate when the valve plate is opened, the load applied to the actuator through the shaft There is a fear that the actuator is damaged.

Further, since the shaft has to extend to the valve plate disposed at the inlet of the intake port, the length of the shaft becomes longer, which raises the parts cost and design restriction as much as the shaft extension length.

SUMMARY OF THE INVENTION The present invention is conceived to solve such problems and it is an object of the present invention to provide an actuator capable of relatively small and inexpensive application as an actuator such as a shaft is not affected by the pressure of exhaust gas by opening / And to provide a flow control valve for an automobile which can reduce costs.

It is another object of the present invention to provide an automatic flow control valve for an automobile which allows the discharge opening to be partly opened and closed in a manner that the valve is opened and closed, so that the exhaust gas can be smoothly supplied while controlling the suction flow rate of the exhaust gas.

In addition, since the valve has a circular cup structure in which the structure of the valve is recessed upward from below, the upper end of the valve is connected to the shaft in a state extending to the upper end of the intake port, Another object of the present invention is to provide an IGZI flow control valve for an automobile which can reduce the cost as a result.

In addition, by providing cooling means for cooling the valve body, it is possible to prevent damage to parts due to high temperature of the exhaust gas, thereby improving the durability of the valve and improving the reliability of the product. Another object is to provide a valve.

To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, there is provided a valve control system for a vehicle, comprising: a valve body having an inlet port opened to allow exhaust gas to flow into a lower end thereof; A valve for opening and closing an outlet port of the valve body; A shaft connected to the valve and a lower end of the valve, the upper end of the valve passing through the upper end of the valve body and extending to the outside of the upper end; And an actuator connected to the upper end of the shaft extending outward to rotate the shaft.

According to an embodiment of the present invention, there is provided an easy flow control valve for an automobile, wherein the valve is closely attached to an inner circumferential surface of the valve body to close the discharge port and is axially rotated by a shaft rotation of the shaft at one side, And a communication hole for opening the discharge port may be provided.

The valve body may have a circular cup structure having a lower end opened and an outlet formed on an outer circumferential surface of the valve main body, And a circular cup structure having an inner circumferential surface and an outer circumferential surface on one side of the outer circumferential surface and having the communication hole penetrated to coincide with the discharge port.

In addition, in the present invention, the outlet port of the valve body and the communication hole of the valve may have a single structure.

According to an embodiment of the present invention, the discharge port of the valve body and the communication hole of the valve may be formed of a pair disposed at both ends of the same diameter line.

Further, in the present invention, the flow control valve for an automobile may further include a bushing between the shaft and the valve body to support the rotation of the shaft smoothly.

In addition, in the present invention, it is preferable that a sealing portion for preventing exhaust gas from leaking to the outside through a gap between the shaft and the valve body between the shaft and the upper end portion of the valve body, .

The valve body may further include cooling means for preventing the valve body from being heated by the high temperature of the exhaust gas on the valve body, according to an embodiment of the present invention.

According to an embodiment of the present invention, the cooling means includes a plurality of cooling water flow paths formed on the valve body, cooling water flows through the cooling water flow paths to cool the valve body .

As described above, according to the embodiment of the present invention, the valve for controlling the flow rate of the automobile can rotate the valve shaft to open and close the discharge port, so that the actuator including the shaft is not affected by the pressure of the exhaust gas, Since the valve can be partially opened and closed in a manner that the valve is opened and closed, the exhaust gas can be smoothly supplied while controlling the suction flow rate of the exhaust gas. Further, since the valve has a circular cup structure in which the structure of the valve is concaved upward from below, the upper end of the valve is connected to the shaft in a state of extending to the upper end of the inlet, whereby the length of the shaft connected to the valve is short As a result, cost reduction can be achieved, and further, Having a cooling means for cooling and by to prevent damage to components caused by high temperature of the exhaust gas, to obtain the effects such as to enable an improvement in the durability of the valves can be also improved reliability of the product.

FIG. 1 is a cross-sectional view of a conventional flow control valve for an automobile according to the prior art.
FIG. 2 is a cross-sectional view illustrating a state in which an intake port of an easy-flow regulating valve for an automobile according to the related art is opened.
FIG. 3 is a cross-sectional view illustrating an automatic flow control valve for an automobile according to an embodiment of the present invention.
FIG. 4 is a plan view showing a state where a discharge port of a flow control valve for an automobile according to an embodiment of the present invention is closed. FIG.
FIG. 5 is a plan view showing a state where an outlet of a flow control valve for an automobile according to an embodiment of the present invention is open. FIG.
FIG. 6 is a cross-sectional view illustrating an automatic flow control valve for an automobile according to another embodiment of the present invention.
FIG. 7 is a plan view showing a state where a discharge port of a flow control valve for an automobile according to another embodiment of the present invention is closed. FIG.
FIG. 8 is a plan view showing a state in which the right outlet of the flow control valve for an automobile according to another embodiment of the present invention is open; FIG.
FIG. 9 is a plan view showing a state in which the left discharge port of the flow control valve for an automobile according to another embodiment of the present invention is open. FIG.

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

As shown in FIGS. 3 to 5, according to an embodiment of the present invention, the flow control valve for an automobile includes an intake port 31 opened to allow exhaust gas to flow into a lower end thereof, A valve 40 for opening and closing an outlet 32 of the valve body 30 and a lower end portion of the valve 40 are connected to each other and an upper end portion of the valve 40 is connected to the valve body 30 And an actuator 60 connected to the upper end of the outwardly extending shaft 50 to rotate the shaft 50 about the shaft 50. [ have.

The valve 40 is in close contact with the inner circumferential surface of the valve body 30 to close the discharge port 32 and is axially rotated by the shaft of the shaft 50 at one side to be connected to the discharge port 32 And a communication hole 41 for opening the communication hole 41 is provided.

The valve body 30 has a circular cup structure having a lower end opened and an outlet 32 formed on an outer circumferential surface thereof and the valve 40 corresponding to the circular cup structure is formed on the inner peripheral surface of the valve body 30. [ And has a circular cup structure having the communication hole 41 penetrating to one side of the outer circumferential surface so as to coincide with the discharge port 32.

A bushing 70 is provided between the shaft 50 and the valve body 30 to support the rotation of the shaft 50 smoothly.

A sealing portion 80 is provided between the shaft 50 and the upper end of the valve body 30 to prevent the exhaust gas from leaking to the outside through a gap between the shaft 50 and the valve body 30 .

Cooling means for preventing the valve body 30 from being heated by the high temperature of the exhaust gas is provided on the valve body 30. The cooling means includes a plurality of cooling water flow paths 33 and the cooling water flows through the cooling water flow path 33 so that the valve body 30 can be cooled.

Reference numeral 34 denotes a flange for fixing the valve body 30 to a predetermined position. Reference numeral 61 denotes a shaft of the actuator 60. Reference numeral 65 denotes a shaft connecting the actuator shaft 61 and the shaft 50 Lt; / RTI >

Meanwhile, the actuator 60 may include a sensor (not shown) for informing a computer (not shown) of the position of the valve 40 to allow accurate position control.

In this way, the position control (adjusting the rotation angle of the valve) becomes possible, and the flow rate of the exhaust gas can be adjusted by adjusting the opening degree of the discharge port 32.

In this embodiment of the present invention, the flow control valve for an automobile according to the present invention is configured such that the actuator 60 selectively rotates the valve 40 through the control of the sensor and the computer, In order to increase the filling rate of the incoming exhaust gas, in order to increase the temperature of the engine immediately after the engine is started, the exhaust gas flows into the engine cylinder without passing through the quick cooler, After the temperature of the engine is sufficiently raised, the exhaust gas passes through the air cooler and flows into the engine cylinder. As a result, an inert gas such as carbon dioxide of the exhaust gas is replaced with a part of the intake air, thereby increasing the heat capacity of the mixer. The temperature rise of the internal combustion gas is suppressed, and the excess air ratio is lowered to generate thermal nitrogen oxide By inhibiting it is possible to reduce the amount of total nitrogen oxides.

6 to 9, the discharge port 32 of the valve body 30 and the communication hole 41 of the valve 40 are provided at both ends on the same diameter line, And the like.

By doing so, the exhaust gas can be selectively supplied not only to the flow rate of the exhaust gas to be sucked but also to parts arranged in other directions.

In this way, the valve for the automobile is controlled to open and close the outlet while the valve is being rotated, so that the actuator including the shaft is not affected by the pressure of the exhaust gas, so that the actuator is relatively small and inexpensive. In addition, since the exhaust port can be partly opened and closed in a manner that the valve is opened and closed in a manner that the valve can be opened and closed, the exhaust gas can be smoothly supplied while controlling the flow rate of the exhaust gas, The structure of the valve becomes a circular cup structure in which the structure of the valve is concaved upward from below, so that the upper end of the valve is connected to the shaft with the upper end extended to the upper end of the intake port, thereby shortening the length of the shaft connected to the valve. The cost can be reduced. Further, when the valve body is cooled By making it possible to provided a cooling means for groups to prevent damage to components caused by high temperature of the exhaust gas, so as to improve the durability of the valves can be also improved reliability of the product.

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 taken by way of limitation, Those skilled in the art will readily appreciate that the techniques available to those skilled in the art are within the scope of the present invention.

DESCRIPTION OF REFERENCE NUMERALS
5: motor 5a: drive gear
7: Valve body 7a: Intake port
9: seat ring 20: shaft
22: valve plate 30: valve body
31: Intake port 32:
33: cooling water flow path 34: flange
40: valve 41: communicating hole
50: shaft 60: actuator
61: Actuator shaft 65: Coupling
70: bushing 80: sealing part

Claims (9)

A valve body having an inlet port opened to allow exhaust gas to flow into the lower end thereof and an outlet port through which exhaust gas is discharged to the outer circumferential surface;
A valve for opening and closing an outlet port of the valve body;
A shaft connected to the valve and a lower end of the valve, the upper end of the valve passing through the upper end of the valve body and extending to the outside of the upper end; And
And an actuator connected to an upper end of the outwardly extending shaft for axially rotating the shaft,
Wherein the valve is in close contact with an inner circumferential surface of the valve body to close the discharge port and is provided with a communication hole which is axially rotated by the shaft rotation of the shaft to open the discharge port in correspondence with the discharge port,
Wherein the valve body is formed in a circular cup structure having a lower end portion thereof opened and an outlet portion formed on an outer circumferential surface of the valve body, the valve being in contact with the inner circumferential surface of the valve body, Wherein the flow control valve is formed in a circular cup structure having a plurality of through holes. delete delete The method according to claim 1,
Wherein the outlet of the valve body and the communication hole of the valve are of a single structure. The method according to claim 1,
Wherein the outlet port of the valve body and the communication hole of the valve are formed of a pair disposed on both ends of the same diameter line. The method according to claim 1,
Further comprising a bushing disposed between the shaft and the valve body for supporting a smooth rotation of the shaft. The method according to claim 1,
Wherein a sealing portion is provided between the shaft and an upper end portion of the valve body to prevent leakage of exhaust gas to a gap between the shaft and the valve body. The method according to claim 1,
Further comprising cooling means for preventing the valve body from being heated by the high temperature of the exhaust gas on the valve body. 9. The method of claim 8,
Wherein the cooling means has a plurality of cooling water flow paths formed on the valve body so that cooling water flows through the cooling water flow paths to cool the valve main body.

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