KR101948520B1 - Integrated back pressure and egr valve module - Google Patents

Abstract

The present invention discloses an integrated back pressure and an EGR valve module.
The integrated back pressure and EGR valve module according to an embodiment of the present invention includes a back pressure valve disposed in an intake passage that sucks a fresh air from the outside; An EGR valve connected to the intake passage and disposed on the LP EGR passage for recirculating the exhaust gas discharged from the engine and passed through the turbine; A first pin guide hole for engaging with a first link interlocking with the EGR valve is formed inside the main body, the first pin guide hole has a first cam formed to have one or more divided regions; And a second pin guide hole for engaging with a second link interlocking with the back pressure valve inside the main body, wherein the second pin guide hole includes a second cam formed to have one or more divided regions, And the first cam and the second cam are located on an actuator axis.

Description

INTEGRATED BACK PRESSURE AND EGR VALVE MODULE

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an integrated back pressure and an EGR valve module, and more particularly, to an integrated back pressure and an EGR valve module incorporating an INTEGRATED BACK PRESSURE VALVE and control of an EGR valve.

Diesel engines are more fuel-efficient than gasoline and are widely used in commercial vehicles such as passenger cars, buses, and trucks and throughout the industry. However, the exhaust gas of diesel engine vehicles contains harmful substances such as carbon monoxide (CO), hydrocarbons (HC), and nitrogen oxides (NOx). Nitrogen oxides (NOx) are generated by the combination of oxygen and nitrogen at high pressure and high temperature, which causes corrosion of buildings and destruction of ecosystems as a major cause of acid rain, and causes human respiratory diseases such as bronchitis, pneumonia and asthma .

Generally, the term "exhaust gas recirculation (EGR)" refers to a technique in which a part of the exhaust gas of the engine is circulated back to the intake system of the engine to utilize the exhaust gas together with the outside air for combustion. And there is an advantage that NOx discharged into the atmosphere can be reduced by recirculating the exhaust gas.

EGR can be divided into HP EGR (high pressure EGR) and LP EGR (low pressure EGR) depending on the position where the exhaust gas is recirculated. Specifically, the HP EGR utilizes a high-temperature and high-pressure exhaust gas having a low pressure drop as an EGR gas by using a recirculation flow path connected from the turbine front end of the turbocharger to the intake manifold side. In contrast, the LP EGR has a difference in that exhaust gas having a relatively lower pressure drop compared to HP EGR is used as the EGR gas by using the recirculation flow path connected from the rear end of the turbine to the outside air suction flow path side of the compressor front end.

The dual LP EGR is located downstream of the DOC (Diesel Oxidation Catalyst), DPF (Diesel Particulate Filter) and / or SCR (Selective Catalytic Reduction), where the pollutants in the recirculated gas are relatively small compared to HP EGR . In addition, LP EGR has an advantage in that it is relatively advantageous in comparison with HP EGR in terms of intake-on-cooling and EGR cylinder distribution. Recently, attention has been paid to the fact that LP EGR has an advantageous effect on the improvement of fuel efficiency. Thus, attention is being paid to LP EGR in order to apply LP EGR to a vehicle equipped with a diesel engine as well as a gasoline engine.

5 is a view showing an EGR valve unit according to the prior art.

5, the low-pressure EGR apparatus 1 includes a low-pressure EGR regulating valve 4 for adjusting the opening of the low-pressure EGR passage 3 for guiding the EGR gas to the intake passage 2 through which the intake air passes, An intake throttle valve 5 for generating an intake sound pressure at a merging portion of the intake passage 2 and the low pressure EGR passage 3 and an electric actuator 6 for driving the low pressure EGR regulating valve 4, The link device 7 for driving the intake throttle valve 5 and the ECU 8 (engine control unit) for controlling the operation of the electric actuator 6 and the link device 7 change the output characteristics of the low- The cam plate 11 rotates integrally with the EGR adjusting valve 4 and rotates integrally with the cam plate 12 and the intake throttle valve 5 so that the driven pin 13 And a follower arm (14) provided with an arm (14).

According to the related art, the conventional LP EGR has a back pressure valve and an EGR valve at the exhaust end, which makes it difficult to control the entire system because the entire system is large and heavy. The back pressure valve, which is exposed to high temperature, Resulting in a problem of causing an increase in the price of the product and an increase in the weight of the system.

When the EGR valve and the back pressure valve for solving the above problems are three-way valve module type, there is an interval in which only the back pressure valve is driven without driving the EGR valve, There is a disadvantage that it must be provided.

Japanese Patent Publication No. 5146484

An embodiment of the present invention is to provide an integrated backpressure and an EGR valve incorporating a back pressure valve and an EGR valve to overcome the problems of the prior art.

According to an aspect of the present invention, there is provided a back pressure control valve comprising: a back pressure valve disposed in an intake passage for sucking a fresh air from the outside; An EGR valve connected to the intake passage and disposed on the LP EGR passage for recirculating the exhaust gas discharged from the engine and passed through the turbine; A first pin guide hole for engaging with a first link interlocking with the EGR valve is formed inside the main body, the first pin guide hole being formed to have one or more divided regions; And a second pin guide hole for engaging with a second link interlocking with the back pressure valve inside the main body, wherein the second pin guide hole includes a second cam formed to have one or more divided regions, The first cam and the second cam may be structured on an actuator axis.

In this structure, the first pin guide hole may include a first guide portion for driving the back pressure valve to rotate in a counterclockwise direction in a non-rotating state when the EGR valve rotates in a counterclockwise direction that is a forward direction; And a second guide portion for driving the back pressure valve to rotate in a counterclockwise direction when the EGR valve is in the non-rotating state.

In this case, when the EGR valve rotates in the counterclockwise direction in the first guide portion, the first cam interlocked by the first link may be rotated counterclockwise.

In addition, the second guide may have a structure in which, when the back pressure valve rotates counterclockwise, the second cam interlocked by the second link rotates counterclockwise.

Wherein the second pin guide hole includes a third guide portion in which the back pressure valve is not rotated when the EGR valve rotates in the forward direction; A fourth guide portion for driving the EGR valve and the back pressure valve to rotate in a forward direction; And a fifth guide portion for driving the back pressure valve to rotate in the reverse direction when the EGR valve is in the non-rotating state.

In the above-described structure, in the third guide portion, the back pressure valve may be in the open state and in the non-rotating state while the EGR valve rotates in the counterclockwise direction.

Further, in the fourth guide portion, while the EGR valve rotates in the counterclockwise direction, the back pressure valve can be rotated counterclockwise from the open state to the closed state.

At this time, in the fifth guide portion, the EGR valve may be in the non-rotating state and the back pressure valve may be rotated in the counterclockwise direction from the opened state to the closed state.

In this structure, when the EGR valve rotates counterclockwise in the third guide part or the fourth guide part, the first cam interlocked by the first link can be rotated clockwise.

Further, when the back pressure valve is rotated in the counterclockwise direction in the fifth guide portion, the second cam interlocked by the second link may be rotated counterclockwise.

According to the present invention, the LP EGR passage may be connected to the longitudinal direction of the intake passage in a diagonal direction at a predetermined angle.

According to one embodiment of the present invention, the integrated back pressure and the EGR valve module integrate the role of the EGR valve drive and the back pressure valve which can increase the EGR flow rate, and can perform the intake throttling in the section without using the EGR ACV (Air Control Valve) is replaced by a compact structure that controls the position of two valves with one sensor, which can reduce cost.

Therefore, by integrating the integrated back pressure and the EGR valve module and the ACV valve into one, it is possible to reduce the vehicle weight and reduce the motor load. In addition, it is possible to reduce the ECU control load by integrating the integral back pressure and control of the EGR valve module and the ACV valve into one.

Therefore, the durability of the motor is increased due to the reduction of the motor load, and the ECU control load is reduced, thereby enabling quick control, thereby increasing the durability of the entire product, lowering the performance requirement of the motor required in the past, Module can be provided.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a view showing an overall schematic view of an internal combustion engine for explaining a position where a valve module of the present invention is mounted; FIG.
2 is a view showing a configuration of a valve module according to an embodiment of the present invention.
Figs. 3 and 4 are views showing preferable opening patterns of the EGR valve and the back pressure valve. Fig.
5 is a view showing an EGR valve unit according to the prior art.

The embodiments described below are provided so that those skilled in the art can easily understand the technical idea of the present invention, and thus the present invention is not limited thereto. In addition, the matters described in the attached drawings may be different from those actually implemented by the schematic drawings to easily describe the embodiments of the present invention.

It is to be understood that when an element is referred to as being connected or connected to another element, it may be directly connected or connected to the other element, but it should be understood that there may be other elements in between.

The term "connection" as used herein means a direct connection or indirect connection between one member and another member, and may refer to all physical connections such as adhesion, attachment, fastening, bonding, and bonding.

Also, the expressions such as 'first, second', etc. are used only to distinguish a plurality of configurations, and do not limit the order or other features between configurations.

The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. Means that a feature, number, step, operation, element, component, or combination of features described in the specification is meant to imply the presence of one or more other features, A step, an operation, an element, a component, or a combination thereof.

Hereinafter, the EGR valve module of the present invention will be described in detail with reference to the drawings.

First, the overall configuration of the internal combustion engine of the present invention will be briefly described with reference to Fig. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a view showing an overall schematic view of an internal combustion engine for explaining a position where a valve module of the present invention is mounted; FIG.

The combustion chamber of the engine of the present invention has an intake manifold and an exhaust manifold. A compressor of a turbocharger is provided on a flow path for supplying intake air to the intake manifold side. An intercooler is provided downstream of the compressor, and an intake throttle (not shown) is provided to control the amount of intake air flowing into the intake manifold.

The exhaust manifold is connected to an exhaust passage for exhausting the exhaust gas to the atmosphere. A turbine (T.) of the turbo charger is connected to the exhaust flow path, and a DPF and / or a catalytic device and a muffler are installed downstream of the turbine T. as an exhaust post-treatment device for purifying the exhaust gas.

In addition, an exhaust gas recirculation (EGR) system for recirculating a part of the exhaust gas to the intake system may be installed in the exhaust passage. The EGR system is typically provided with an EGR cooler for reducing the temperature of the exhaust gas at a high temperature and an EGR valve for controlling the flow rate of the exhaust gas flowing into the EGR passage.

As the EGR system, the LP EGR system is applied to the internal combustion engine of the present invention. The LP EGR is advantageous in improving the fuel efficiency as well as the intake-on-cooling and the EGR cylinder distributing performance as described above in the background art, but it must follow the problem of forming the back pressure for recirculating the exhaust gas. Therefore, in the present invention, an EGR valve and a 3-way valve can be constructed as a valve for generating back pressure for LP EGR. This will be described in detail later.

More specifically, the LP EGR of the present invention is branched from the exhaust passage at the front end of the muffler and circulates a part of the exhaust gas to the intake system. Here, the exhaust gas recirculation cooler and the exhaust gas flowing into the EGR passage are controlled An EGR valve is provided.

The fresh air received in the air cleaner AC flows to the compressor C. side of the turbocharger via the intake passage 20. The exhaust air recirculated through the EGR passage before entering the compressor C. Mixed. The flow direction of the mixer faces the compressor (C.) side.

For reference, a crank angle sensor for detecting the rotation of the crankshaft of the internal combustion engine or an excel sensor (position sensor or opening angle sensor, etc.) for outputting a signal according to the opening degree of the excel pedal may be provided. The target output of the vehicle and thus the fuel injection amount of the engine combustion chamber, the target air amount to be introduced into the intake manifold, and the most important EGR rate (EGR rate) in the opening of the EGR valve of the present invention are calculated using the crank angle sensor and the excel sensor Can be determined.

For reference, the valve module of the present invention may be provided at a portion indicated by a dotted line in FIG.

Based on the configuration of the internal combustion engine as described above, the features of the valve module of the present invention will be described in more detail with reference to Figs. 3 and 4. Fig.

FIG. 2 is a view showing the configuration of a valve module according to one embodiment of the present invention, and FIGS. 3 and 4 show a view of a preferred opening degree of the EGR valve and the back pressure valve.

Referring to FIGS. 2 to 4 together, the integral back pressure and EGR valve module includes an EGR valve 100, a back pressure valve 200, a first cam 300 interlocked with the EGR valve 100, And a second cam (400) interlocked with the second cam (400).

According to the present invention, the back pressure valve (200) is disposed in the intake passage (20) for drawing a fresh air from the outside. The EGR valve 100 is disposed on the LP EGR passage 10 connected to the longitudinal direction of the intake passage 20 in a diagonal direction at a predetermined angle and recirculating the exhaust gas discharged from the engine and passed through the turbine have.

Here, both the EGR valve 100 and the back pressure valve 200 may be flap valves.

Here, the EGR valve 100 means an LP EGR valve, and the back-pressure valve 200 can mean a back-pressure generating valve for forming a back pressure at a junction point between the EGR passage 10 and the intake passage 20 . The back-pressure valve 200 also serves to regulate the amount of fresh air introduced, but also assists the EGR valve to facilitate recirculation and mixing of the EGR gas.

According to the present invention, the first cam 300 is shown by a relatively thick solid line in the figure, and the first pin 120 of the first link 110, which is interlocked with the EGR valve 100, A first pin guide hole 310 is formed.

The first pin guide hole 310 includes a first guide portion 311 for driving the back pressure valve 200 to rotate in the forward direction when the EGR valve 100 rotates in the forward direction, And a second guide portion 312 for driving the back pressure valve 200 so as to rotate in the forward direction when the valve body 100 is in the non-rotating state.

Here, the first pin guide hole 310 is a curved section divided into at least two sections, and is divided into two sections in the figure. Here, the curved sections divided into the first guide part 311 and the second guide part 312 may have different radii of curvature. The first pin 120 of the first link 110 interlocked with the EGR valve 100 is connected to the first pin guide hole 310 of the first pin guide hole 310, And is fastened to the hole 310.

The second cam 400 has a second pin guide hole 410 which is coupled to the second pin 220 of the second link 210 interlocked with the back pressure valve 200.

The second pin guide hole 410 includes a third guide portion 411 in which the back pressure valve 200 does not rotate when the EGR valve 100 rotates in the forward direction, And a fifth guide portion 413 for driving the back-pressure valve 200 to rotate in the reverse direction when the EGR valve 100 is in the non-rotating state, and a fourth guide portion 412 for driving the back- .

The first guide part 311 and the second guide part 312 are divided areas in which the first pin 120 is guided and the third guide part 411 and the fourth guide part 412, And the fifth guide part 413 may refer to a divided area where the second pin 220 is guided. These regions may be indicated by dashed lines as shown in Fig.

Similarly to the first pin guide hole 310 described above, the second pin guide hole 410 has a curved section divided into two or more sections, and is divided into three sections in the figure. Here, the curved sections divided into the third guide part 411, the fourth guide part 412 and the fifth guide part 413 may have centers of curvature radii different from each other. The centers of curvature radii of the second pin guide holes 410 are configured to be located in the inner direction of the main body of the second cam 400 like the centers of curvature radii of the first pin guide hole 310, The second pin 220 of the second link 210 interlocked with the second pin guide hole 410 is fastened to the second pin guide hole 410.

The second pin 220 of the second link 210 engaged with and engaged with the second pin guide hole 410 formed in the second cam 400 is supported by the third guide portion 411 When the EGR valve 100 is moved in the counterclockwise direction, the back pressure valve 200 remains open and is not rotated. That is, the first pin 120 of the first link 110 interlocked with the EGR valve 100 moves in the first guide portion 311 of the first pin guide hole 310 and the EGR valve 100 rotates And the back pressure valve 200 does not rotate even if the second pin 220 of the second link 210 moves in the third guide portion 411 of the second pin guide hole 410.

When the second pin 220 of the second link 210 engaged with and engaged with the second pin guide hole 410 formed in the second cam 400 moves in the fourth guide portion 412 The back pressure valve 100 rotates counterclockwise from the open state to the closed state while the EGR valve 100 rotates counterclockwise. That is, the first pin 120 of the first link 110 interlocked with the EGR valve 100 moves in the first guide portion 311 of the first pin guide hole 310 and the EGR valve 100 rotates And the second pin 220 of the second link 210 is moved in the fourth guide part 412 of the second pin guide hole 410 so that the back pressure valve 100 is closed from the open state. And is rotated counterclockwise.

Meanwhile, when the second pin 220 of the second link 210 coupled with and engaged with the second pin guide hole 410 formed in the second cam 400 moves in the fifth guide portion 413 When the EGR valve 100 is in the closed state, the back pressure valve 100 rotates in the counterclockwise direction to be in the closed state. That is, while the first pin 120 of the first link 110 linked with the EGR valve 100 moves in the second guide portion 312 of the first pin guide hole 310, the EGR valve 100 When the second pin 220 of the second link 210 is moved in the fifth guide portion 412 of the second pin guide hole 410 and the back pressure valve 100 is in the closed state And is rotated counterclockwise.

At this time, the first cam 300 having the first pin guide hole 310 and the second cam 400 having the second pin guide hole 410 are disposed outside the intake air flow path and the LP EGR flow path It is located on the actuator axis which is located.

In the integrated back pressure and EGR valve module according to the embodiment of the present invention, the valve units in which the EGR valve and the back pressure valve are separately controlled according to the prior art have been disclosed, but this increases the cost increase and control complexity. The present invention proposes only the structure for the valve module including the EGR valve 100, the back pressure valve 200 and the cams 300 and 400 interlocked by the respective links 330 and 430.

The EGR valve 100 and the back pressure valve 200 are connected to the first cam 300 and the second link 210 which are coupled to the first pin 120 of the first link 110, And the second cam 400 coupled to the second pin 220 of the second cam 220.

The mechanism will be described in more detail with reference to Figs. 2 to 4. Fig.

2 to 4, the first cam 300 is engaged with the EGR valve 100 by the first pin 120 of the first link 110, and the second cam 400 is engaged with the EGR valve 100 by the second And is linked with the back pressure valve 200 by the second pin 220 of the link 210.

The first pin 120 of the first link 110 interlocked with the EGR valve 100 moves from the first guide portion 311 of the first pin guide hole 310 to the first guide portion 311 of the EGR valve 100, , Only the fresh air flows on the intake flow path 20. The first back pressure valve 200 is opened in a full open state to maintain the open state and the second pin 220 interlocked with the back pressure valve 200 moves in the third guide portion 411 . That is, when the second pin 220 interlocked with the back pressure valve 200 is positioned in the third guide portion 411, the initial back pressure valve 200 is opened in a full open state to open And is in a non-rotating state.

The first pin 120 of the first link 110 interlocked with the EGR valve 100 moves counterclockwise along the first guide portion 311 of the first pin guide hole 310, When the second pin 220 of the second link 210 interlocked with the valve 200 moves in the third guide portion 411, the back pressure valve 200 is in the non-rotating state. When the second pin 220 of the second link 210 linked to the back pressure valve 200 moves in the fourth guide portion 412, the back pressure valve 200 is closed from the open state to the closed state, And rotates in the opposite direction. Therefore, when the EGR valve 100 is opened at a predetermined opening angle or more, EGR gas is supplied to the intake passage 10 side, and the supplied EGR gas is mixed with the fresh air.

When the EGR valve 100 rotates counterclockwise in the third guide part 411 and the fourth guide part 412, the first pin 110 of the first link 110 is interlocked When the back pressure valve 200 rotates counterclockwise in the fifth guide part 413, the first cam 300 rotates clockwise and the second pin 220 of the second link 210 rotates clockwise, The second cam 400 is rotated in the counterclockwise direction.

The first pin 120 of the first link 110 interlocked with the EGR valve 100 moves in the first guide portion 311 of the first pin guide hole 310 and the EGR valve 100 moves to the maximum opening The EGR gas is supplied only to the downstream of the intake passage 10, while the back pressure valve 200 interlocked with the second cam 400 is fully closed. At this time, a maximum back pressure is formed on the downstream side of the intake passage 10 by the back pressure valve 200, so that the supply rate of the EGR gas is further increased.

On the other hand, when the first pin 120 of the first link 110 interlocked with the EGR valve 100 moves in the second guide portion 312 so that the EGR valve 100 is in the non-rotating state and the second cam When the second pin 220 of the second link 210 linked with the back pressure valve 400 moves in the fifth guide portion 413, the second cam 400 interlocked with the back pressure valve 200 is rotated counterclockwise Direction.

According to an embodiment of the present invention, the EGR passage 10 may be connected to the longitudinal direction of the intake passage 20 in a diagonal direction at a predetermined angle. If the EGR passage 10 is connected to the intake passage 20 at a right angle other than diagonal directions, foreign matter such as nitrogen oxides may accumulate in the back-pressure valve 200 located in the intake passage 20, causing valve failure. Therefore, the EGR passage 10 is connected to the intake passage 20 in a diagonal direction to prevent this.

In another embodiment of the present invention, the diameter of the EGR passage 10 is smaller than the diameter of the intake passage 20. That is, when the cross-sectional area of the LP EGR passage is compared with the sectional area of the intake passage 20, the cross-sectional area of the LP EGR passage is previously designed small so that only the EGR valve 100 is opened. When the back-pressure valve 200 is closed, Can be made small.

In the prior art shown in Fig. 5, a follower arm 14 for connecting the back-pressure valve to the EGR valve is indispensably provided, and the cam is positioned on the drive shaft (on the EGR valve side) Since the cams 300 and 400 are respectively positioned on the axes of the EGR valve 100 and the back pressure valve 200 in the present invention, the inertial load . Specifically, in the section where the EGR valve only rotates, the entire cam rotates in the prior art shown in FIG. 5, but in the present invention, since there is a non-rotating section of the back pressure valve, the load applied to the motor becomes relatively small.

In summary, the integrated back pressure and EGR valve module of the present invention can perform the intake throttling in a section that does not use EGR, so that the cost can be reduced by replacing the role of ACV with a compact structure. By integrating the integrated back pressure and the control of the EGR valve module and the ACV valve into one, it is possible to reduce the vehicle weight and reduce the ECU control load.

Therefore, the structure is simple compared to the conventional technology, and the manufacturing is easy, and cost reduction is possible. In the LP EGR section, the inertial moment due to the weight reduction of the output gear is reduced, thereby reducing the product weight and the motor load.

Also, since the motor load is reduced, the durability of the motor can be increased and the controllability of the motor can be increased. Thus, the durability of the entire product can be increased, and the performance demand of the motor can be lowered, thereby providing a more compact valve module. .

If necessary, the driving period of the back pressure valve and the EGR valve can be easily changed, and the cam for the reverse rotation and the synchronous driving section can be designed more easily.

The present specification is not intended to limit the present invention by the specific terms given. 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, Modifications, alterations, and modifications can be made.

The scope of the present invention is defined by the appended claims rather than the foregoing description, and all changes or modifications derived from the meaning and scope of the claims and equivalents thereof are deemed to be included in the scope of the present invention. .

10: EGR flow passage 20: intake flow passage
100: EGR valve 110: first link
120: first pin 200: back pressure valve
210: second link 220: second pin
300: first cam 310: first pin guide hole
311: first guide part 312: second guide part
400: second cam 410: second pin guide hole
411: third guide part 412: fourth guide part
413: fifth guide portion

Claims (11)

A back pressure valve disposed in an intake passage for taking in fresh air from the outside;
An EGR valve connected to the intake passage and disposed on the LP EGR passage for recirculating the exhaust gas discharged from the engine and passed through the turbine;
A first pin guide hole for engaging with a first link interlocking with the EGR valve is formed inside the main body, the first pin guide hole being formed to have one or more divided regions; And
A second pin guide hole is formed in the body to engage with a second link interlocking with the back pressure valve, and the second pin guide hole is formed with at least one divided region;
/ RTI >
Wherein the first cam and the second cam are located on an actuator axis. The method according to claim 1,
The first pin guide hole
A first guide portion for driving the back pressure valve to rotate in a counterclockwise direction in a non-rotating state when the EGR valve rotates in a counterclockwise direction that is a forward direction; And
A second guide portion for driving the back pressure valve to rotate in a counterclockwise direction when the EGR valve is in the non-rotating state;
Wherein the EGR valve module includes: 3. The method of claim 2,
And the first cam interlocked by the first link rotates counterclockwise when the EGR valve rotates counterclockwise in the first guide portion. 3. The method of claim 2,
And the second cam interlocked by the second link rotates counterclockwise when the back pressure valve is rotated counterclockwise in the second guide portion. The method according to claim 1,
The second pin guide hole
A third guide portion in which the back pressure valve does not rotate when the EGR valve rotates in the forward direction;
A fourth guide portion for driving the EGR valve and the back pressure valve to rotate in a forward direction; And
A fifth guide portion for driving the back pressure valve to rotate in the reverse direction when the EGR valve is in the non-rotating state;
Wherein the EGR valve module includes: 6. The method of claim 5,
Wherein the back pressure valve is in the open state and in the non-rotating state in the third guide portion while the EGR valve rotates in the counterclockwise direction. 6. The method of claim 5,
And the back pressure valve is rotated in the counterclockwise direction from the open state to the closed state while the EGR valve rotates counterclockwise in the fourth guide portion. 6. The method of claim 5,
Wherein the EGR valve is in the non-rotating state and the back pressure valve is rotated in the counterclockwise direction from the open state to the closed state in the fifth guide portion. 8. The method according to claim 6 or 7,
And the first cam interlocked by the first link rotates in the clockwise direction when the EGR valve rotates counterclockwise in the third guide part or the fourth guide part. 9. The method of claim 8,
And the second cam interlocked by the second link rotates counterclockwise when the back pressure valve is rotated counterclockwise in the fifth guide portion. The method according to claim 1,
Wherein the LP EGR passage is connected to the longitudinal direction of the intake passage in a diagonal direction at a predetermined angle.

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