KR101886110B1 - Exhaust system for vehicle and valve thereof - Google Patents

Abstract

An exhaust system of a vehicle according to an embodiment of the present invention includes an exhaust line for exhausting exhaust gas passed through the post-treatment apparatus to the outside; A bypass line branched from the exhaust line and communicating with the exhaust line; A cooler disposed on the bypass line to recover exhaust heat from exhaust gas passing through the bypass line; A recirculation line communicating the bypass line with an intake line of the engine; A recirculation valve for opening and closing the recirculation line so that exhaust gas passing through the bypass line is selectively supplied to the intake line; And a discharge mode in which the flow path of the exhaust gas passed through the post-treatment apparatus is discharged through the exhaust line, an exhaust heat recovery mode in which the exhaust heat is discharged through the exhaust line after the exhaust heat is recovered from the cooler while passing through the bypass line And an exhaust gas recirculation mode that is transmitted to the intake line sequentially through the bypass line and the recirculation line.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an exhaust system for a vehicle,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an exhaust system of a vehicle and a valve thereof, and more particularly to a valve that is applied to an exhaust system and an exhaust system of a vehicle that realize exhaust heat recovery and exhaust gas recirculation and is operated to realize exhaust heat recovery and exhaust gas recirculation .

Generally, an exhaust gas recirculation (EGR) system is a system mounted on a vehicle for the reduction of harmful exhaust gases.

Such an exhaust gas recirculation system functions to circulate a part of the exhaust gas discharged from the engine to the intake air to reduce the amount of oxygen in the mixer, reduce the amount of exhaust gas, and reduce harmful substances in the exhaust gas.

Further, since the exhaust gas discharged from the engine is very hot, a cooling device for lowering the temperature of the recirculated exhaust gas is usually provided.

BACKGROUND ART [0002] In recent years, an exhaust heat recovery system has been applied to a vehicle in which exhaust heat recovered by the cooling device is supplied to a portion of the vehicle where heating is required.

However, if the configuration of the exhaust gas recirculation system is complicated to increase the exhaust gas recirculation efficiency or the configuration of the exhaust heat recovery system is complicated to increase the heat exchange efficiency, the cost may be increased and the weight of the vehicle may be increased. On the other hand, there is a limitation in the combination of the layout of the exhaust gas recirculation system and the layout of the exhaust heat recovery system due to the space limitation, and such restriction may deteriorate either the exhaust gas recirculation efficiency or the heat exchange efficiency.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide an exhaust system and a valve for a vehicle that realize exhaust gas recirculation and exhaust heat recovery while overcoming layout limitations.

To achieve this object, a vehicle exhaust system according to an embodiment of the present invention may be an exhaust system of a vehicle that converts a flow path of exhaust gas via an exhaust gas post-treatment apparatus of an engine.

The exhaust system includes an exhaust line for exhausting the exhaust gas passed through the post-treatment apparatus to the outside; A bypass line branched from the exhaust line and communicating with the exhaust line; A cooler disposed on the bypass line to recover exhaust heat from exhaust gas passing through the bypass line; A recirculation line communicating the bypass line with an intake line of the engine; A recirculation valve for opening and closing the recirculation line so that exhaust gas passing through the bypass line is selectively supplied to the intake line; And a discharge mode in which the flow path of the exhaust gas passed through the post-treatment apparatus is discharged through the exhaust line, an exhaust heat recovery mode in which the exhaust heat is discharged through the exhaust line after the exhaust heat is recovered from the cooler while passing through the bypass line And an exhaust gas recirculation mode that is transmitted to the intake line sequentially through the bypass line and the recirculation line.

Wherein the exhaust line includes a stop exhaust line between a point at which the bypass line is branched and a point at which the bypass line is communicated at a later stage; And a rear end exhaust line at a rear end of the stopped exhaust line.

Wherein the bypass line includes: a front bypass line of the front end of the cooler; And a rear end bypass line at the rear end of the cooler.

The mode change valve may be disposed at a portion where the stop exhaust line, the rear end exhaust line, and the rear end bypass line meet.

In the discharge mode, the recirculation valve closes the recirculation line, and the mode conversion valve closes the rear end bypass line.

In the exhaust heat recovery mode, the recirculation valve closes the recirculation line, and the mode conversion valve closes the stopped exhaust line.

In the exhaust gas recirculation mode, the recirculation valve may open the recirculation line, and the mode conversion valve may close the stop exhaust line and the rear end bypass line.

Wherein the mode changeover valve includes a recirculation flap provided to be hingeably movable to selectively close the stop exhaust line between the stop exhaust line and the rear end bypass line; A recirculation flap rotary shaft integrally formed with the recirculation flap, the hinge axis of the recirculation flap; A recirculation rotation transmitting portion formed at one axial end of the recirculation flap rotary shaft; A recirculating gear rotatably connected to the recirculating flap rotary shaft between the recirculating flap and the recirculating rotation transmitting part and rotating the recirculating rotary transmitting part by a gear connection with the motor in accordance with the rotation of the motor; A recovering flap provided hingably movably between the rear end bypass line and the recycling flap to selectively close the rear end bypass line; A recovery flap rotary shaft integrally formed with the recovery flap as a hinge shaft of the recovery flap; A recovery rotation transmitting portion formed at one axial end of the recovery flap rotation shaft; And a recovery gear rotatably connected to the recovery flap rotation shaft between the recovery flap and the recovery rotation transmitting portion and rotating the recovery rotation transmitting portion by gear connection with the motor in accordance with rotation of the motor .

Wherein the mode conversion valve includes: a recirculating radial projection projecting radially from the recirculation rotation transmitting portion; And a recirculating axial protrusion protruding from the recirculation gear in the axial direction of the recirculation flap rotary shaft at a position spaced a distance from the centrifugal point of the recirculating gear.

The recirculating gear may be rotated to rotate the recirculating rotation transmitting portion so that the recirculating axial protrusion pushes the recirculating radial protrusion.

Wherein the mode-switching valve includes: a counter-clockwise protrusion protruding in the radial direction from the recovery rotation transmitting portion; And a recovery axial protrusion protruding from the recovery gear in the axial direction of the recovery flap rotary shaft at a position spaced from the centrifugal center of the recovery gear by a predetermined distance.

And the recovery gear may rotate to rotate the recovery rotation transmitting portion so that the recovery axial protrusion pushes the recovered radial protrusion.

The recovery flap rotary shaft may be rotatably connected to the recirculating flap rotary shaft as an axis concentric with the recirculating flap rotary shaft.

The rotation timing and the direction of the motor can be controlled by the control unit.

Wherein the mode change valve includes: a motor gear rotating directly connected to the motor; A first connecting gear having a first motor connecting portion that rotates in engagement with the motor gear and a return connecting portion that rotates in engagement with the return gear; And a second connection gear having a second motor connection portion that rotates in engagement with the first motor connection portion and a recirculation connection portion that rotates in engagement with the recirculation gear.

The mode change valve may further include a stopper protruding from the recovery flap toward the recycling flap.

A valve of a vehicle exhaust system according to an embodiment of the present invention includes an exhaust line for exhausting exhaust gas of an engine via a post-treatment apparatus, a bypass line branched from the exhaust line and communicating with the exhaust line, A cooler disposed on the pass line for recovering the exhaust heat, and a recirculation line communicating the bypass line with the intake line of the engine.

Wherein the valve includes a exhaust mode in which exhaust gas is exhausted via the exhaust line, an exhaust heat recovery mode in which exhaust gas is exhausted through the exhaust line after exhaust heat is recovered from the cooler while exhaust gas passes through the bypass line, May be operated to implement one of the exhaust gas recirculation modes that are transmitted to the intake line sequentially through the bypass line and the recirculation line.

Wherein the exhaust line is constituted by an end exhaust line between a point at which the bypass line is branched and a point at which the bypass line is communicated with the downstream end and a rear end exhaust line at a rear end of the stop exhaust line, The front exhaust line, the rear end exhaust line, and the rear end bypass line, when the front end bypass line and the rear end bypass line of the front end of the cooler and the rear end of the cooler are constituted.

The valve may be actuated to close the trailing bypass line in the discharge mode.

The valve may be operated to close the stopped exhaust line in the exhaust heat recovery mode.

The valve may be actuated to close the stop exhaust line and the downstream bypass line in the exhaust gas recirculation mode.

The valve comprising: a recirculation flap provided to be hingeably movable to selectively close the stop exhaust line between the stop exhaust line and the rear end bypass line; A recirculation flap rotary shaft integrally formed with the recirculation flap, the hinge axis of the recirculation flap; A recirculation rotation transmitting portion formed at one axial end of the recirculation flap rotary shaft; A recirculating gear rotatably connected to the recirculating flap rotary shaft between the recirculating flap and the recirculating rotation transmitting part and rotating the recirculating rotary transmitting part by a gear connection with the motor in accordance with the rotation of the motor; A recovering flap provided hingably movably between the rear end bypass line and the recycling flap to selectively close the rear end bypass line; A recovery flap rotary shaft integrally formed with the recovery flap as a hinge shaft of the recovery flap; A recovery rotation transmitting portion formed at one axial end of the recovery flap rotation shaft; And a recovery gear rotatably connected to the recovery flap rotation shaft between the recovery flap and the recovery rotation transmitting portion and rotating the recovery rotation transmitting portion by gear connection with the motor in accordance with rotation of the motor .

Wherein the valve comprises: a recirculating convex projection projecting radially from the recirculation rotation transmitting portion; And a recirculating axial protrusion protruding from the recirculation gear in the axial direction of the recirculation flap rotary shaft at a position spaced a distance from the centrifugal point of the recirculating gear.

The recirculating gear may be rotated to rotate the recirculating rotation transmitting portion so that the recirculating axial protrusion pushes the recirculating radial protrusion.

Wherein the valve includes: a countercurrent projection protruding radially from the recovery rotation transmitting portion; And a recovery axial protrusion protruding from the recovery gear in the axial direction of the recovery flap rotary shaft at a position spaced from the centrifugal center of the recovery gear by a predetermined distance.

And the recovery gear may rotate to rotate the recovery rotation transmitting portion so that the recovery axial protrusion pushes the recovered radial protrusion.

The recovery flap rotary shaft may be rotatably connected to the recirculating flap rotary shaft as an axis concentric with the recirculating flap rotary shaft.

The valve may be operated as the motor is controlled by the control unit in the timing and direction of rotation.

The valve includes: a motor gear rotating directly connected to the motor; A first connecting gear having a first motor connecting portion that rotates in engagement with the motor gear and a return connecting portion that rotates in engagement with the return gear; And a second connection gear having a second motor connection portion that rotates in engagement with the first motor connection portion and a recirculation connection portion that rotates in engagement with the recirculation gear.

The valve may further include a stopper protruding from the recovery flap toward the recycling flap.

As described above, according to the embodiment of the present invention, the configuration for realizing the discharge of exhaust gas, exhaust heat recovery, and recirculation is simplified, so that the cost can be reduced.

In addition, a valve that selectively implements discharge of exhaust gas, exhaust heat recovery, and recirculation by the operation of two flaps concentrically hinging is applied to provide a configuration for realizing exhaust gas exhaust heat recovery and recirculation It is possible to overcome the spatial constraint.

Furthermore, since the recovered exhaust heat is used for engine warm-up, fuel economy can be improved ultimately.

1 is a configuration diagram of a vehicle exhaust system according to an embodiment of the present invention.
2 is a view showing an exhaust heat recovery mode of a vehicle exhaust system according to an embodiment of the present invention.
3 is a view showing an exhaust gas recirculation mode of an exhaust system of a vehicle according to an embodiment of the present invention.
4 is a schematic perspective view of a mode change valve according to an embodiment of the present invention.
5 is a view illustrating a mode conversion valve according to an embodiment of the present invention viewed from one direction.
6 is a view illustrating a mode conversion valve according to an embodiment of the present invention viewed from one direction.
FIG. 7 is a perspective view of a recirculation flap for implementing a mode of heat recovery mode according to an embodiment of the present invention. FIG.
8 is an operational view of a recovery flap for implementing a mode heat recovery mode according to an embodiment of the present invention.
FIG. 9 is a perspective view showing a mode conversion valve according to an embodiment of the present invention operated to realize an exhaust heat recovery mode. FIG.
10 is an isometric view of a recirculation flap for implementing a mode of exhaust gas recirculation mode according to an embodiment of the present invention.
11 is an operational view of a recovery flap for implementing an exhaust gas recirculation mode in accordance with an embodiment of the present invention.
12 is a perspective view showing a mode conversion valve according to an embodiment of the present invention operated to realize an exhaust gas recirculation mode.

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

1 is a configuration diagram of a vehicle exhaust system according to an embodiment of the present invention.

1, a vehicle exhaust system 1 according to an embodiment of the present invention includes an exhaust line 10, a post-processing apparatus 20, a turbocharger 60, an intake line 50, A line 15, a cooler 30, a recirculation line 40, a recirculation valve 45, and a mode changeover valve 100.

The exhaust line 10 is a passage through which the exhaust gas of an engine (not shown) is discharged to the outside.

The post-treatment apparatus 20 is disposed on the exhaust line 10 to perform post-treatment of the exhaust gas. The post-treatment apparatus 20 is a device that functions to remove or reduce contaminants contained in the exhaust gas, and will be apparent to those skilled in the art (hereinafter referred to as a person skilled in the art). .

The turbocharger 60 is composed of a turbine 62 and a compressor 64. Further, the turbine 62 is connected to the exhaust manifold of the engine and is rotated by the flow of the exhaust gas. That is, the exhaust line 10 is provided so that the exhaust gas passing through the exhaust line 10 sequentially passes through the turbine 62 of the turbocharger 60 and the post-treatment device 30. Further, the compressor 64 compresses the fresh and recirculated exhaust gas by the rotational force of the turbine 62, and the high-pressure fresh and recirculated exhaust gas compressed by the compressor 64 is supplied to the engine as an intake air. The turbocharger 60 is an auxiliary device of the engine and will be apparent to those skilled in the art, so that a detailed description thereof will be omitted.

The intake line 50 is a passage through which intake air such as fresh or recirculated exhaust gas is supplied to the engine. 1 to 3 show the exhaust line 10 at the rear end of the turbine 62 through which the exhaust gas passed through the turbine 62 passes and the front end of the compressor 64 through which the intake air transmitted to the compressor 64 passes The illustration of the exhaust line 10 at the front end of the turbine 62 and the intake line 50 at the rear end of the compressor 64 is omitted.

In the present specification, the front end and the rear end are relative expressions of each part according to the time sequence of exhaust gas, intake, or recirculated exhaust gas passing through the exhaust gas, intake, or recirculated exhaust gas flow of the engine.

The bypass line 15 is a path for bypassing the exhaust gas passing through the exhaust line 10 and branched from the exhaust line 10 at the rear end of the post-treatment device 30, And communicates with the exhaust line (10). The exhaust line 10 communicating the turbine 62 and the post-processing apparatus 30 is referred to as a front-end exhaust line 10a and the bypass line 30a is disposed at a rear end of the post- The exhaust line 10 between the point at which the bypass line 15 branches and the point at which the bypass line 15 further communicates with the exhaust line 10 is referred to as a stop exhaust line 10b, The exhaust line 10 at the rear end of the exhaust line 10b will be referred to as a rear end exhaust line 10c.

The cooler 30 is disposed on the bypass line 15 to recover exhaust heat from the exhaust gas passing through the bypass line 15. [ That is, the exhaust gas passing through the bypass line 15 is cooled through the cooler 30. The exhaust heat recovered by the cooler 30 can be supplied to a portion of the vehicle where heating is required. Further, a supply passage (not shown) of the exhaust heat recovered in the cooler 30 may be provided so as to communicate with the cooler 30 and the portion requiring the heating. The bypass line 15 at the front end of the cooler 30 is referred to as a front end bypass line 15a and the bypass line 15 at the rear end of the cooler 30 is referred to as a rear end bypass line 15b, Will be described below.

The recycle line 40 is connected to the bypass line 15 and the intake line 50 to selectively deliver the exhaust gas bypassed through the bypass line 15 to the intake line 50 as the intake air of the engine. . That is, the recirculation line 40 is a passage through which recirculated exhaust gas is supplied as an intake air. The recirculation line 40 may communicate with the bypass line 15 at the rear end of the cooler 30.

The recirculation valve (45) is disposed on the recirculation line (40) to selectively open and close the recirculation line (40). Further, when the recirculation valve 45 opens the recirculation line 40, the exhaust gas on the bypass line 15 is transferred to the intake line 50 through the recirculation line 40.

The mode conversion valve 100 is operated to implement the flow path of the exhaust gas via the post-treatment device 30 in three modes. The mode conversion valve 100 is disposed at a portion where the end exhaust line 10b, the rear end exhaust line 10c, and the rear end bypass line 15b meet so that the three modes can be implemented.

Here, the three modes are a discharge mode in which the exhaust gas passed through the post-treatment device 30 is discharged to the outside through the sequential exhaust line 10b and the rear-end exhaust line 10c, An exhaust heat recovery mode in which exhaust gas passed through the bypass line 30 is discharged to the outside through the rear end exhaust line 10c after exhaust heat is recovered from the cooler 30 while passing through the bypass line 15, An exhaust gas recirculation mode in which exhaust gas passed through the processing device 30 is transferred to the intake line 50 via the bypass line 15 and the recirculation line 40 sequentially.

1 shows an exhaust mode of a vehicle exhaust system according to an embodiment of the present invention. As shown in FIG. 1, in the discharge mode, the mode conversion valve 100 closes the rear end bypass line 15b with the recirculation valve 45 closing the recirculation line 40. Accordingly, the exhaust gas passed through the post-treatment device 30 is discharged to the outside through the end exhaust line 10b and the rear end exhaust line 10c sequentially.

2 is a view showing an exhaust heat recovery mode of a vehicle exhaust system according to an embodiment of the present invention.

2, in the exhaust heat recovery mode, the mode conversion valve 100 closes the stopped exhaust line 10b in a state in which the recirculation valve 45 closes the recirculation line 40. As shown in FIG. Accordingly, the exhaust gas passed through the post-treatment device 30 is discharged to the outside via the bypass line 15 and the rear end exhaust line 10c in sequence. At this time, the cooler 30 recovers exhaust heat.

3 is a view showing an exhaust gas recirculation mode of an exhaust system of a vehicle according to an embodiment of the present invention.

3, in the exhaust gas recirculation mode, the recirculation valve 45 opens the recirculation line 40, and the mode switching valve 100 is opened in the exhaust line 10b, The pass line 15b is closed. Accordingly, the exhaust gas passed through the post-treatment device 30 is transferred to the intake line 50 via the bypass line 15 and the recirculation line 40 in sequence.

FIG. 4 is a schematic perspective view of a mode conversion valve according to an embodiment of the present invention, FIG. 5 is a view illustrating a mode conversion valve according to an embodiment of the present invention viewed from any direction, FIG. FIG. 2 is a view showing a mode conversion valve according to another embodiment of the present invention.

On the other hand, FIG. 4 shows the arrangement of the respective components of the mode conversion valve 100 in the discharge mode as shown in FIG.

4 to 6, the mode conversion valve 100 according to the embodiment of the present invention includes a recirculation flap 110, a recirculation flap rotation axis 111, a recirculation rotation transmission portion 112, The recovery flap 120, the recovery flap rotation shaft 121, the recovery rotation transmission portion 122, the recovery yarn protrusion 124, the recovery gear 125, A motor gear 130, a first connecting gear 135, a second connecting gear 137, and a stopper 129, as shown in FIG.

The recirculation flap 110 is hingably provided between the stop exhaust line 10b and the rear end bypass line 15b to selectively close the stop exhaust line 10b. The hollow ventilation line 10b and the rear end bypass line 15b are formed in a corresponding shape and the recycling flap 110 is connected to the end exhaust line 10b and the rear end bypass line 15b, 15b, respectively.

The recirculation flap rotary shaft 111 is formed integrally with the recirculation flap 110 as the hinge axis of the recirculation flap 110. [

The recirculation rotation transmission portion 112 is formed at one end in the axial direction of the recirculation flap rotation axis 111.

The recirculating salient projections 114 are formed in the recirculation rotation transmitting portion 112. In addition, the recirculating salient projections 114 project radially from the recirculation rotation transmitting portion 112.

The recirculation gear 115 is a circular gear and is rotatably connected to the recirculation flap rotary shaft 111 between the recirculation flap 110 and the recirculation rotation transmission part 112. Further, the recirculation flap rotary shaft 111 penetrates the centrifugal shaft of the recirculating gear 115. Here, it is needless to say that gear teeth are formed along the outer circumference of the recirculation gear 115.

The recirculating shaft protrusion 117 is formed in the recirculation gear 115. The recirculating shaft protrusion 117 is projected in the axial direction of the recirculation flap rotary shaft 111 at a position adjacent to the recirculating rotation transmitting portion 112 and spaced a distance from the centrifugal force of the recirculating gear 115. That is, the recirculating axial protuberance 117 circularly moves in accordance with the rotation of the recirculation gear 115. Here, the recirculating radial projections 114 are disposed in the circular motion locus of the recirculating axial protrusion 117. Therefore, the recirculating axial protrusion 117 functions to push the recirculating radial protrusion 114 in accordance with the rotation of the recirculating gear 115, and the recirculating radial protrusion 114 is protruded by the recirculating axial protrusion 117 The recirculating flap 110 and the recirculating flap rotation shaft 111 and the recirculation flap 110 are rotated integrally so that the hinge movement of the recirculation flap 110 .

The recovery flap 120 is hingably provided to selectively close the rear bypass line 15b between the stop exhaust line 10b and the rear bypass line 15b. Further, the recovery flap 120 is formed in a plate shape corresponding to the recycling flap 110. Further, the recovery flap 120 is disposed between the rear end bypass line 15b and the recycling flap 110, and in the exhaust mode as shown in FIGS. 1 and 4, the recovery flap 120 and the recycling flap (110) overlap. 4 to 6 show a circular cross section of the hollow end face of the end discharge line 10b and the rear end bypass line 15b and the plate shape of the recycle flap 110 and the recovery flap 120. However, It is not limited.

The recovery flap rotary shaft 121 is formed integrally with the recovery flap 120 as a hinge shaft of the recovery flap 120. The recovery flap rotary shaft 121 is rotatably connected to the recirculation flap rotary shaft 111 as an axis concentric with the recirculation flap rotary shaft 111.

For example, the recovery flap rotary shaft 121 is formed into a hollow cylindrical shape, and the recirculation flap rotary shaft 111 is inserted into the hollow of the recovery flap rotary shaft 121, The flap rotary shaft 111 can be coupled so as to be concentric with each other. At this time, the recovery flap rotary shaft 121 is disposed between the recirculation flap 110 and the recirculation rotation transmission portion 112.

The recovery rotation transmitting portion 122 is formed at one end in the axial direction of the recovery flap rotation shaft 121.

The recovered radial protrusion 124 is formed in the recovery rotation transmitting portion 122. Further, the recovered radial protrusion 124 protrudes in the radial direction from the recovery rotation transmitting portion 122.

The recovery gear 125 is a circular gear and is rotatably connected to the recovery flap rotary shaft 121 between the recovery flap 120 and the recovery rotation transmission portion 122. Further, the recovery flap rotary shaft 121 passes through the centrifuge of the recovery gear 125. Here, it is needless to say that gear teeth are formed along the outer periphery of the return gear 125. In FIGS. 4 to 6, the radiuses of the return gear 125 and the recirculation gear 115 are shown to be the same, but the present invention is not limited thereto. However, it is preferable that the rotation angle of the recovery gear 125 and the recirculation gear 115 are the same when the rotation force of the power source rotating at the same rotation speed is transmitted along the outer periphery through the gear teeth.

The recovery shaft 127 is formed in the recovery gear 125. The return shaft rotation protrusion 127 protrudes in the axial direction of the recovery flap rotation shaft 121 at a position adjacent to the recovery rotation transmission portion 122 and spaced from the centrifugal shaft of the recovery gear 125 by a predetermined distance. That is, the recovery axial protrusion 127 performs a circular motion in accordance with the rotation of the recovery gear 125. Here, the recovered radial protrusion 124 is disposed in the circular motion locus of the recovery axial protrusion 127. Therefore, the recovery axial convex protrusion 127 functions to push the recovered radial protrusion 124 in accordance with the rotation of the recovery gear 125, and the recovered radial protrusion 124 is rotated by the recovery radial protrusion 127 The rotation of the recovery flap 120 and the recovery flap rotation shaft 121 and the recovery flap 110 are integrally rotated so that the hinge movement of the recovery flap 120 .

The motor gear 130 is directly connected to the motor 140, which is a power source of the mode conversion valve 100, and rotates integrally with the rotation shaft of the motor 140. Here, it is needless to say that gear teeth are formed along the outer periphery of the motor gear 130. In addition, the motor 140 is controlled by the controller 150. The control unit 60 may be a conventional electronic control unit (ECU) that controls the control of the electronic devices of the vehicle.

The first connecting gear 135 is a circular gear, and rotates around a centrifugal center. The rotation shaft (not shown) of the first connection gear 135, which is an extension of the centrifugal force of the first connection gear 135, is rotatably connected to the fixed body, As shown in Fig. Here, the fixed body means a portion fixed to the vehicle body or the vehicle body.

The first connecting gear 135 is a two-stage gear having a first motor connecting portion 135a and a return connecting portion 135b. The first motor connection part 135a and the recovery connection part 135b are integrally formed to have a different radius and to be disposed concentrically. Here, the gear teeth may be formed along the outer periphery of the first motor connecting portion 135a and the return connecting portion 135b. Further, the first motor connection part 135a is rotated by engaging with the motor gear 130, and the recovery connection part 135b is engaged with the recovery gear 125 and rotated.

The second connecting gear 137 is a circular gear, and rotates around a centrifugal center. The rotation shaft (not shown) of the second connecting gear 137, which is an extension of the centrifugal force of the second connecting gear 137, is rotatably connected to the fixing body, As shown in Fig. Here, the fixed body means a portion fixed to the vehicle body or the vehicle body.

The second connecting gear 137 is a two-stage gear having a second motor connecting portion 137a and a recirculating connecting portion 137b. In addition, the second motor connection portion 137a and the recirculation connection portion 137b are integrally formed so as to have different radii and be disposed concentrically. Here, the gear teeth may be formed along the outer periphery of the second motor connection portion 137a and the recirculation connection portion 137b. Further, the second motor connection part 137a is rotated by engaging with the first motor connection part 135a, and the recirculation connection part 137b is engaged with the recirculation gear 115 and rotates.

The stopper 129 prevents direct collision between the plate and the plate when the recycle flap 110 and the recovering flap 120 collide with each other due to the operation of the mode conversion valve 100, And is formed protruding from the flap 110 or the recovery flap 120 in the rotating direction. 4, the stopper 129 is shown protruding from the recovery flap 120 toward the recycling flap 110, but the present invention is not limited thereto. In addition, when the return flap 120 is hinged while pushing the recycling flap 110 according to the operation of the mode change valve 100, the stopper 129 can smoothly transmit the rotational force. Further, when the recovery flap 120 and the recycling flap 110 are overlapped with each other, they are spaced apart by the stopper 129 by a certain distance.

Hereinafter, the operation of the mode conversion valve 100 for implementing the exhaust heat recovery mode and the exhaust gas recirculation mode will be described with reference to FIGS. 7 to 12. FIG. Here, in the exhaust mode as shown in FIGS. 1 and 4, the position of each component of the mode change valve 100 is defined as the home position, and the mode change valve 100, which is operated to realize the exhaust heat recovery mode and the exhaust gas recirculation mode from the home position, The motion of each component of the mobile terminal 100 will be described.

FIG. 7 is a perspective view of a recirculation flap for implementing a mode of heat recovery mode according to an embodiment of the present invention. FIG.

7, when the motor gear 130 rotates in the counterclockwise direction in the home position state of the mode change valve 100, the rotation of the first coupling gear 135 engaged with the motor gear 130 The first motor connection portion 135a rotates clockwise and the second motor connection portion 137a engaged with the first motor connection portion 135a rotates counterclockwise. In addition, as the recirculation connection part 137b rotates counterclockwise integrally with the second motor connection part 137a, the recirculation gear 115 engaged with the recirculation connection part 137b rotates clockwise. At this time, as the recirculating axial protuberance 117, which is in contact with the recirculating convex protuberance 114 in the home position, circularly moves in the clockwise direction away from the recirculating convex protuberance 114, rotation of the recirculating radial protuberance 114 The hinge movement of the recirculation flap 110, which is rotated integrally with the recirculation flap 110, is not realized.

8 is an operational view of a recovery flap for implementing a mode heat recovery mode according to an embodiment of the present invention.

7 and 8, when the motor gear 130 rotates in the counterclockwise direction in the home position state of the mode change valve 100, the first connection gear (not shown) engaged with the motor gear 130 The first motor connection portion 135a of the first motor connection portion 135 and the recovery connection portion 135b integrally rotating with the first motor connection portion 135a rotate clockwise and the recovery gear 125 ) Rotates counterclockwise. At this time, as the recovery axial convex protrusion 127, which is in contact with the recovered radial protrusion 124 in the home position, circularly moves in the counterclockwise direction pushing the recovered radial protrusion 124, rotation of the recovered radial protrusion 124 The swivel flap 120 rotating integrally with the swivel arm 120 hinges in a counterclockwise direction.

FIG. 9 is a perspective view showing a mode conversion valve according to an embodiment of the present invention operated to realize an exhaust heat recovery mode. FIG.

As shown in FIG. 9, when the recovery flap 120 is hinged according to the operation of the mode conversion valve 100 described with reference to FIGS. 7 and 8, the recovery flap 120 and The overlapping recirculation flaps (110) are pushed together by the recovery flaps (120) and hinged together. At this time, the rear end bypass line 15b closed by the recovery flap 120 in the home position is opened, and the stop exhaust line 10b is closed by the recycling flap 110. [ Therefore, the exhaust heat recovery mode of the exhaust system 1 of the vehicle according to the embodiment of the present invention as shown in Fig. 2 is realized.

10 is an isometric view of a recirculation flap for implementing a mode of exhaust gas recirculation mode according to an embodiment of the present invention.

10, when the motor gear 130 rotates in the clockwise direction in the home position state of the mode change valve 100, the first gear 135 of the first coupling gear 135 engaged with the motor gear 130 The first motor connection part 135a rotates counterclockwise and the second motor connection part 137a engaged with the first motor connection part 135a rotates clockwise. Also, as the recirculation connection part 137b rotates clockwise integrally with the second motor connection part 137a, the recirculation gear 115 engaged with the recirculation connection part 137b rotates counterclockwise. At this time, as the recirculating axial protuberance 117 in contact with the recirculating cervical protrusion 114 in the home position is circularly moved in the counterclockwise direction pushing the recirculating cervical protrusion 114, the rotation of the recirculating cervical protrusion 114 The recirculating flap 110, which rotates integrally by the first and second exhaust valves 110 and 120, hinges in a counterclockwise direction.

11 is an operational view of a recovery flap for implementing an exhaust gas recirculation mode in accordance with an embodiment of the present invention.

10 and 11, when the motor gear 130 rotates in the clockwise direction in the home position state of the mode change valve 100, the first connecting gear 135 engaged with the motor gear 130, The first motor connection portion 135a of the first motor connection portion 135a and the recovery connection portion 135b that rotates integrally with the first motor connection portion 135a are rotated counterclockwise and the recovery gear 125 engaged with the recovery connection portion 135b, Is rotated clockwise. At this time, as the recovery axial convex protrusion 127, which is in contact with the recovered radial protrusion 124 in the home position, circularly moves in the clockwise direction away from the recovered radial protrusion 124, the rotation of the recovered radial protrusion 124 The hinge movement of the recovery flap 120, which is rotated integrally with the recovery flap 120, is not realized.

12 is a perspective view showing a mode conversion valve according to an embodiment of the present invention operated to realize an exhaust gas recirculation mode.

As shown in FIG. 12, when the recirculation flap 110 is hinged according to the operation of the mode conversion valve 100 described with reference to FIGS. 10 and 11, And the closed exhaust line 10b is closed by the recirculation flap 110. As a result, Therefore, the exhaust gas recirculation mode of the exhaust system 1 of the vehicle according to the embodiment of the present invention as shown in Fig. 3 is realized.

In FIGS. 4, 9, and 12, the portions where the end exhaust line 10b, the rear end exhaust line 10c, and the rear end bypass line 15b meet are omitted, but the end exhaust line 10b ), The rear end exhaust line 10c, and the rear end bypass line 15b are airtight. 9, the return to the exhaust mode as shown in FIG. 4 is performed by the recirculation flap 110 and the recovery flap 120, And a return spring (not shown) that is provided to return the sample to the original position. These return springs may be provided to the recycle flap 110 and the recovery flap 120, respectively, and are easily applicable to those skilled in the art.

As described above, according to the embodiment of the present invention, the configuration for realizing the discharge of exhaust gas, exhaust heat recovery, and recirculation is simplified, so that the cost can be reduced. In addition, by applying the valve 100 selectively implementing the discharge of the exhaust gas, the exhaust heat recovery, and the recirculation by the operation of the two flaps 110 and 120 concentrically hinged, exhaust gas discharge, exhaust heat recovery, And spatial constraints for providing a configuration that implements recirculation can be overcome. Furthermore, since the recovered exhaust heat is used for engine warm-up, fuel economy can be improved ultimately.

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.

Claims (24)

1. An exhaust system for a vehicle that converts a flow path of an exhaust gas via an exhaust gas post-treatment apparatus of an engine,
An exhaust line for exhausting the exhaust gas passed through the post-treatment apparatus to the outside;
A bypass line branched from the exhaust line and communicating with the exhaust line;
A cooler disposed on the bypass line to recover exhaust heat from exhaust gas passing through the bypass line;
A recirculation line communicating the bypass line with an intake line of the engine;
A recirculation valve for opening and closing the recirculation line so that exhaust gas passing through the bypass line is selectively supplied to the intake line; And
A discharge mode in which the flow path of the exhaust gas passed through the post-treatment apparatus is discharged through the exhaust line, an exhaust heat recovery mode in which the exhaust heat is recovered through the exhaust line after the exhaust heat is recovered from the cooler while passing through the bypass line, And an exhaust gas recirculation mode that is sequentially transmitted to the intake line via the bypass line and the recirculation line;
, ≪ / RTI &
The exhaust line
A stop exhaust line between a point where the bypass line is branched and a point that is communicated with a subsequent stage; And
A rear end exhaust line at a rear end of the stop exhaust line;
/ RTI >
The bypass line includes:
A front bypass line of the front end of the cooler; And
A rear end bypass line at the rear end of the cooler;
/ RTI >
Wherein the mode conversion valve is disposed at a portion where the stop exhaust line, the rear end exhaust line, and the rear end bypass line meet,
Wherein the mode-
A recirculation flap provided hingably movably between the stop exhaust line and the rear end bypass line so as to selectively close the stop exhaust line;
A recirculation flap rotary shaft integrally formed with the recirculation flap, the hinge axis of the recirculation flap;
A recirculation rotation transmitting portion formed at one axial end of the recirculation flap rotary shaft;
A recirculating gear rotatably connected to the recirculating flap rotary shaft between the recirculating flap and the recirculating rotation transmitting part and rotating the recirculating rotary transmitting part by a gear connection with the motor in accordance with the rotation of the motor;
A recovering flap provided hingably movably between the rear end bypass line and the recycling flap to selectively close the rear end bypass line;
A recovery flap rotary shaft integrally formed with the recovery flap as a hinge shaft of the recovery flap;
A recovery rotation transmitting portion formed at one axial end of the recovery flap rotation shaft; And
A recovery gear rotatably connected to the recovery flap rotation shaft between the recovery flap and the recovery rotation transmitting portion and rotating the recovery rotation transmitting portion while being rotated by gear connection with the motor in accordance with rotation of the motor;
And an exhaust system for exhausting the exhaust gas. delete The method according to claim 1,
The recirculation valve closes the recirculation line in the exhaust mode, and the mode conversion valve closes the rear end bypass line. The method according to claim 1,
And in the exhaust heat recovery mode, the recirculation valve closes the recirculation line, and the mode conversion valve closes the stopped exhaust line. The method according to claim 1,
Wherein the recirculation valve opens the recirculation line in the exhaust gas recirculation mode and the mode switching valve closes the stop exhaust line and the rear end bypass line. delete The method according to claim 1,
Wherein the mode-
A recirculating convex projection projecting radially from the recirculation rotation transmitting portion; And
A recirculating axial protrusion protruding from the recirculation gear in the axial direction of the recirculation flap rotary shaft at a position spaced a distance from the centrifugal point of the recirculating gear;
Further comprising:
And the recirculating gear rotates to rotate the recirculating rotation transmitting portion so that the recirculating axial protrusion pushes the recirculating radial projection. The method according to claim 1,
Wherein the mode-
A recovering radial projection projecting radially from the recovery rotation transmitting portion; And
A recovering axial protrusion protruding from the recovery gear in the axial direction of the recovery flap rotary shaft at a position spaced from the centrifugal center of the recovery gear by a predetermined distance;
Further comprising:
And the recovery gear rotates to rotate the recovery rotation transmitting portion so that the recovery axial protrusion pushes the recovered radial protrusion. The method according to claim 1,
Wherein said recovery flap rotary shaft is rotatably connected to said recirculating flap rotary shaft as an axis concentric with said recirculating flap rotary shaft. The method according to claim 1,
Wherein the motor is controlled by the control unit in a rotating timing and a direction. The method according to claim 1,
Wherein the mode-
A motor gear directly connected to the motor and rotated;
A first connecting gear having a first motor connecting portion that rotates in engagement with the motor gear and a return connecting portion that rotates in engagement with the return gear; And
A second motor connecting portion rotating in engagement with the first motor connecting portion, and a recirculating connecting portion rotating in engagement with the recirculating gear;
Further comprising: an exhaust system for exhausting the exhaust gas. The method according to claim 1,
Wherein the mode change valve further comprises a stopper protruding from the recovery flap toward the recirculation flap. A bypass line branched from the exhaust line and communicating with the exhaust line, a cooler disposed on the bypass line and recovering exhaust heat, 1. A valve for a vehicle exhaust system comprising a recirculation line communicating a line with an intake line of an engine,
An exhaust heat recovery mode in which exhaust gas is exhausted via the exhaust line, exhaust heat recovery mode in which exhaust gas is exhausted through the exhaust line after exhaust heat is recovered from the cooler while exhaust gas passes through the bypass line, And one of the exhaust gas recirculation modes being sequentially transmitted to the intake line via the line and the recirculation line,
Wherein the exhaust line is constituted by an end exhaust line between a point where the bypass line branches and a point behind the bypass line and a rear end exhaust line behind the stop exhaust line, Pass line and a rear-end bypass line at the rear end of the cooler,
The end exhaust line, the rear end exhaust line, and the rear end bypass line,
A recirculation flap provided hingably movably between the stop exhaust line and the rear end bypass line so as to selectively close the stop exhaust line;
A recirculation flap rotary shaft integrally formed with the recirculation flap, the hinge axis of the recirculation flap;
A recirculation rotation transmitting portion formed at one axial end of the recirculation flap rotary shaft;
A recirculating gear rotatably connected to the recirculating flap rotary shaft between the recirculating flap and the recirculating rotation transmitting part and rotating the recirculating rotary transmitting part by a gear connection with the motor in accordance with the rotation of the motor;
A recovery flap disposed to be hingeably movable to selectively close the rear bypass line between the rear bypass line and the recycling flap;
A recovery flap rotary shaft integrally formed with the recovery flap as a hinge shaft of the recovery flap;
A recovery rotation transmitting portion formed at one axial end of the recovery flap rotation shaft; And
A recovery gear rotatably connected to the recovery flap rotation shaft between the recovery flap and the recovery rotation transmitting portion and rotating the recovery rotation transmitting portion while being rotated by gear connection with the motor in accordance with rotation of the motor;
And a second valve. delete 14. The method of claim 13,
And to close the downstream bypass line in the exhaust mode. 14. The method of claim 13,
And to close the stopped exhaust line in the exhaust heat recovery mode. 14. The method of claim 13,
And to close the stop exhaust line and the rear end bypass line in the exhaust gas recirculation mode. delete 14. The method of claim 13,
A recirculating convex projection projecting radially from the recirculation rotation transmitting portion; And
A recirculating axial protrusion protruding from the recirculation gear in the axial direction of the recirculation flap rotary shaft at a position spaced a distance from the centrifugal point of the recirculating gear;
Further comprising:
And the recirculating gear rotates to rotate the recirculating rotation transmitting portion so that the recirculating axial protrusion pushes the recirculating radial protrusion. 14. The method of claim 13,
A recovering radial projection projecting radially from the recovery rotation transmitting portion; And
A recovering axial protrusion protruding from the recovery gear in the axial direction of the recovery flap rotary shaft at a position spaced from the centrifugal center of the recovery gear by a predetermined distance;
Further comprising:
And the recovery gear rotates to rotate the recovered rotation transmission part so that the recovery axial protrusion pushes the recovered radial protrusion. 14. The method of claim 13,
Wherein said recovery flap rotary shaft is rotatably connected to said recirculation flap rotary shaft as an axis concentric with said recirculating flap rotary shaft. 14. The method of claim 13,
Wherein the motor is actuated as the rotational timing and direction are controlled by the control unit. 14. The method of claim 13,
A motor gear directly connected to the motor and rotated;
A first connecting gear having a first motor connecting portion that rotates in engagement with the motor gear and a return connecting portion that rotates in engagement with the return gear; And
A second motor connecting portion rotating in engagement with the first motor connecting portion, and a recirculating connecting portion rotating in engagement with the recirculating gear;
Further comprising: 14. The method of claim 13,
Further comprising a stopper protruding from the recovery flap toward the recycling flap.

Images