KR20140011565A - Waste gate valve and turbo charger system - Google Patents

Abstract

A universal waste gate valve (10) of the present invention is characterized by the formation of a chamber (K) surrounding a connecting unit (3), through which exhaust gas leaked from a bypass path (7) connected to a turbocharger (1) escapes; and of an inner clearance (C), for spreading of the exhaust gas coming out of the connecting unit (3) to the chamber (K), in an interior space of the chamber (K); and by provision of a flame leak cutoff member (20), where an outer clearance (B) for discharging to the outside the exhaust gas charged in the chamber (K) is formed between an outer periphery border face of the chamber (K) and a securing face of the connecting unit (3), a possibility where the exhaust gas discharged to the outside forms an extended leak path to be discharged as a flame leak can be fundamentally prevented, and in particular, safety against flame leak in turbochargers of gasoline engines in a relatively higher temperature condition than turbochargers of diesel engines can be secured.

Description

General-purpose waste gate valve and turbocharger system using same

The present invention relates to a waste gate valve, and in particular, a general-purpose waste gate valve having a safety of flame leakage due to high temperature exhaust gas leaking to the outside even in a turbocharger of a gasoline engine, which is relatively high temperature condition compared to a turbocharger of a diesel engine. It relates to a turbocharger system used.

In general, the intake system of the diesel engine is applied to the turbocharger that can increase the intake pressure by recycling the exhaust energy can contribute to improved fuel economy, high power and NOx reduction.

To this end, the turbocharger is composed of a turbine (Turbine) is rotated by using the energy of the flow of exhaust gas, and a compressor (Compressor) is connected to the turbine by a rotating shaft to compress the air supplied to the combustion chamber.

However, the turbocharger has a limitation that the air flow rate supplied to the combustion chamber cannot be adjusted according to the operating conditions of the engine.

Therefore, the turbocharger further includes a control means for controlling the rotation of the turbine to adjust the air flow rate supplied to the combustion chamber in accordance with the operating conditions of the engine, which is commonly referred to as a waste gate valve.

The waste gate valve is provided in a bypass passage that bypasses the turbine in the path from the exhaust manifold to the exhaust pipe, and an actuator is applied as a power source to open and close the bypass passage.

In general, the operating environment of the waste gate valve should be ensured at high temperature operation safety with appropriate airtight structure by exposure to high temperature exhaust gas heat.

Domestic Patent Publication 10-2009-0064200 (June 18, 2009)

The patent document describes a technique for a turbocharger with a waste gate valve which improves the airtightness of the bypass passage from the exhaust manifold to the exhaust pipe to the exhaust pipe and in particular prevents the boost pressure abnormality due to the deposited carbon. For example.

To this end, the patent document is a waste gate valve configured with a turbocharger is pivoted to the link, the valve stem having a valve body for opening and closing the bypass passage is coupled to the self-aligning mechanism, the return spring is to support the valve body It has a structural feature.

For this reason, the said patent document improves the airtight performance to the inlet of a bypass passage by the self-aligned mechanism of a waste gate valve, and especially the boost pressure of a turbocharger is normally ensured in the low speed low load operation area of an engine, Can be prevented from being lowered.

However, the patent document is required to change the structure and design due to the increase in the number of parts by securing the airtightness of the waste gate valve by adding a self-aligning mechanism and a return spring.

In particular, if the emphasis is on securing the airtightness of the bypass passage and the valve stem as in the above-mentioned patent document, there is no solution for preventing the formation of flames caused by the high-temperature exhaust gas flowing out from the bypass passage via the waste gate valve. .

In general, the connection portion between the waste gate valve and the turbocharger has a structure in which a path of the hot gas leaking to the outside is relatively short, and the section is heated to a high temperature due to the heat of the hot exhaust gas.

Therefore, the hot exhaust gas leaking out of the bypass passage and exiting the connection portion of the waste gate valve and the turbocharger is not discharged in the form of gas, but the risk of being discharged in the form of flame through the side portion of the connection portion is very high.

In particular, this risk is further exacerbated when durability decreases due to long-term operation of the waste gate valve, which inevitably increases the frequency of flame leakage.

In addition, the above-mentioned flame formation is particularly deepened in the gasoline engine heated to a relatively higher temperature than the diesel engine, so that the waste gate valve is hardly applied to the turbocharger of the gasoline engine.

Therefore, the present invention in view of the above-mentioned by forming a relatively long leakage path of the hot exhaust gas to the outside through the connection portion of the waste gate valve in the bypass passage can be a high temperature exhaust gas leak into the flame leak There is a turbocharger system using a universal waste gate valve, which can fundamentally prevent the possibility of fire and secure safety against flame leakage even in a turbocharger of a gasoline engine, which is relatively hot compared to a turbocharger of a diesel engine. The purpose is to.

General purpose waste gate valve of the present invention for achieving the above object and the actuator is a power source;

A manipulation rod that is pulled or pushed by the actuator;

A chamber is formed to surround the connection portion through which the exhaust gas leaked from the bypass passage connected to the turbocharger is formed, and an inner gap C through which the exhaust gas from the connection portion is diffused into the chamber is formed in the inner space of the chamber. A flame leakage blocking member having an outer gap B through which the exhaust gas filled in the chamber is discharged to the outside, formed between an outer edge of the chamber and a seating surface of the connection part;

A gate which is operated through the flame leakage blocking member connected to the operation rod and which opens the exhaust gas passage of the bypass passage by the operation;

Is included.

The flame leakage blocking member forms the chamber having an inner space, and is provided with a protective cap surrounding the connecting portion at intervals with a seating surface of the connecting portion to form the outer gap B, wherein the operation rod and the gate are provided. Interlinked with;

A gate rod coupled to the interlink, the gate rod coupled to the gate such that the gate opens an exhaust gas passage of the bypass passage;

A bush which receives the gate rod and penetrates the connection part, and a portion protruding to the outside of the connection part is spaced apart from an inner surface of the chamber to form the inner gap C;

.

The interlink is connected to the manipulation rod and the fastening rod, and the fastening rod is provided at an opposite portion of the protective cap to which the interlink is connected.

The outer gap B is set to be maintained at least 0.1 mm even if the temperature condition of the protective cap is 600 degrees or more, and the inner gap C is set to 0.35 mm.

The outer gap B is set within 0.3 mm to 0.7 mm.

In addition, the turbocharger system of the present invention for achieving the above object to form an inner gap (C) through which the exhaust gas leaked out of the bypass passage and the outer gap (B) through which the exhaust gas is discharged to the outside. A waste gate valve provided with a flame leakage blocking member having a chamber and a gate opening the exhaust gas passage of the bypass passage through operation through the flame leakage blocking member connected to an operation rod that is pulled or pushed by an actuator as a power source. Wow;

A connecting housing connected to the bypass passage is provided, and the connecting housing is provided with a connecting portion surrounded by the chamber of the flame leakage blocking member, and the connecting portion is spaced apart from an outer edge of the chamber to form the outer gap B. A turbocharger having a seating surface formed thereon;

Characterized in that it comprises a.

The flame leakage blocking member is formed with a chamber having an inner space, the outer gap (B) is provided with a protective cap surrounding the connecting portion at intervals with the seating surface of the connecting portion to be set within 0.3mm ~ 0.7mm, An interlink to which the manipulation rod and the gate are connected; A gate rod coupled to the interlink, the gate rod coupled to the gate such that the gate opens an exhaust gas passage of the bypass passage; A bush which receives the gate rod and penetrates the connection part, and a portion protruding to the outside of the connection part is spaced apart from the inner surface of the chamber to set the inner gap C to 0.35 mm; .

The present invention forms a relatively long leakage path of the hot exhaust gas that exits to the outside through the connection portion of the waste gate valve in the bypass passage, so that the hot exhaust gas is flame flamed through the connection portion of the waste gate valve and the turbocharger. There is a fundamental effect of preventing the possibility of leakage.

In addition, the present invention fundamentally prevents flame leakage due to high temperature exhaust gas at the connection portion of the waste gate valve and the turbocharger, thereby preventing flame leakage even in a turbocharger of a gasoline engine having a relatively high temperature condition compared to a turbocharger of a diesel engine. It also has the effect of ensuring safety.

1 is a configuration diagram of a turbocharger system to which a universal waste gate valve according to the present invention is applied to a turbocharger, and FIG. 2 is a configuration diagram of a flame leakage blocking member constituting a universal waste gate valve according to the present invention. 4 is a cross-sectional view of the flame leakage blocking member applied to the general-purpose waste gate valve according to the present invention, and FIG. 4 is an operating state of the flame leakage blocking member constituting the general-purpose waste gate valve according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which illustrate exemplary embodiments of the present invention. The present invention is not limited to these embodiments.

1 shows a turbocharger system to which a universal waste gate valve according to the present embodiment is applied.

As shown, the turbocharger system is provided with a turbocharger 1 having a connecting housing 2 connected to a bypass passage 7 and a bypass passage through which hot exhaust gas flows by using the connecting housing 2. It consists of the general-purpose waste gate valve 10 which opens and closes the channel | path of (7).

The turbocharger 1 is a turbocharger applied to a diesel engine or a turbocharger applied to a gasoline engine, and is usually a turbine that is rotated using the energy of the exhaust gas and a turbine that is connected to the turbine by a rotating shaft and supplied to the combustion chamber. Compressor for compressing the air.

The waste gate valve 10 is a general-purpose type used together with a turbocharger applied to a diesel engine or a turbocharger applied to a gasoline engine. This means that the waste gate valve is a gasoline engine having a relatively high temperature condition compared to a turbocharger of a diesel engine. This is due to the safety of flame leakage in the turbocharger.

To this end, the waste gate valve 10 is connected to the actuator 11 as a power source, the operation rod 12 which is pulled or pushed through the actuator 11, and the turbocharger 1 in the bypass passage 7. Flame leakage blocking member 20 to prevent flame leakage by the hot exhaust gas exiting the housing 2, and the gate 70 is rotated through the operating rod 12 to open and close the bypass passage (7) do.

The flame leakage blocking member 20 blocks the connection housing 2 from the outside while extending the leakage path of the hot exhaust gas from the bypass passage 7 to the connection housing 2 of the turbocharger 1. The interlink 30 is connected to one side of the interlink 30, the fastening rod 40 which transmits the movement of the manipulation rod 12 to the interlink 30, and the bypass passage connected to the other side of the interlink 30. The bypass passage is formed through the gap between the gate rod 50 for opening and closing the gate 70 provided in the door 7 and the inner circumferential surface surrounding the gate rod 50 through the connection housing 2 of the turbocharger 1. It consists of a bush 60 to form an external leakage path of the hot exhaust gas from 7).

On the other hand, Figure 2 shows the configuration of the interlink 30 constituting the flame leakage blocking member 20.

As shown, the interlink 30 is connected to the connection body 31 of the turbocharger 1 and the connection body 31 is connected to one side of the coupling rod 40 for transmitting the movement of the operation rod 12 to the interlink 30 (2) is provided with a chamber (K) to cover the outside exposed to the protective cap 32 integrally formed on the connecting body 31, and the opening and closing operation of the gate 70 provided in the bypass passage (7) The shaft rod 33 is fixed to the gate rod 50.

Fastening rod 40 may be integrally formed on the connection body 31.

The protective cap 32 is formed integrally with the connecting body 31 at the opposite side of the fastening rod 40, the constant chamber height (A) so that the hot exhaust gas can be collected in the chamber (K) constituting the inner space Is formed.

The diameter D of the shaft hole 33 is formed to a size that the gate rod 50 for opening and closing the gate 70 can be press-fitted.

3 is a cross-sectional view of the flame leakage blocking member 20 for connecting the general-purpose waste gate valve and the turbocharger according to the present embodiment.

When the flame leakage blocking member 20 is assembled with the connecting portion 3 constituting the connecting housing 2 of the turbocharger 1, the interlink 30 is connected to the operating rod 12 to the protective cap 32 By blocking the connection portion 3 formed in the connection housing 2 of the turbocharger 1 with the outside, the gate rod 50 is fixed to the shaft hole 33 drilled in the protective cap 32 of the interlink 30, The bush 60 is coupled to the connection part 3 of the connection housing 2 in a state in which the gate rod 50 is wrapped.

Therefore, the connecting portion 3 of the connecting housing 2 in which the hot exhaust gas flowing out of the bypass passage 7 and introduced into the gap between the gate rod 50 and the bush 60 leaks to the outside is connected to the interlink 30. ) Is covered by a protective cap 32, and the high-temperature exhaust gas from the outside of the connection part 3 is leaked out to fill the inner space of the chamber K by the chamber K of the protective cap 32. After more is formed may exit the protective cap 32 to the outside.

To this end, the protective cap 32 is the chamber height (A) of the chamber (K) is the rod exposure height (10) that the end of the gate rod 50 exits from the connecting portion (3) of the connecting housing (2) ( H) and the end surface formed by the upper portion 60a constituting the end portion of the bush 60 are determined in consideration of the bush exposure height h exiting from the connecting portion 3 of the connecting housing 2 to the outside.

The chamber height A of the chamber K is determined in consideration of the rod exposure height H of the gate rod 50, so that the protective cap 32 of the interlink 30 and the turbocharger 1 are connected to each other (2). When the connecting portion 3 forming the coupling unit 3 is coupled, an outer gap B may be formed between the outer edge of the chamber K forming the protective cap 32 and the seating surface 3a of the connecting unit 3. have.

The outer gap B is used as a discharge passage through which the hot exhaust gas exiting the chamber K formed in the protective cap 32 of the interlink 30 from the bypass passage 7 can be discharged to the outside.

In addition, the chamber height (A) of the chamber (K) is determined in consideration of the bush exposure height (h) of the bush 60 to connect the housing of the protective cap 32 and the turbocharger 1 of the interlink ( 2) When the connecting portion 3 is formed, the inner gap (C) between the inner surface of the inner space of the chamber (K) forming the protective cap 32 and the end surface formed by the upper portion (60a) of the bush (60) This can be formed.

The inner gap C is formed in the protective cap 32 of the interlink 30 by the hot exhaust gas exiting from the bypass passage 7 to the connecting portion 3 formed in the connecting housing 2 of the turbocharger 1. A diffusion path that can spread to the chamber K is used.

Due to the inner gap C as described above, the hot exhaust gas is not immediately discharged to the outside, but can spread to the inner space of the chamber K.

Therefore, in addition to the main leakage path formed by the gap between the gate rod 50 and the bush 60, the leakage path before the hot exhaust gas escapes to the outside through the outer gap B is protected from the interlink 30. Through the cap 32, the inner space of the chamber K may be as long as the sub-leakage path.

In this embodiment, the chamber height (A), the rod exposure height (H) and the bush exposure height (h) is set in a relationship in which the outer gap (B) and the inner gap (C) can be formed, in this case high temperature Conditions that do not occur, even if affected, are also considered.

For example, considering the setting conditions of the outer gap (B), even if the protective cap 32 of the interlink 30 is exposed to a temperature environment of about 600 degrees when the outer gap (B) is maintained at about 0.1mm It is an optimal condition to discharge hot exhaust gas to the outside without flame leakage, while the outer gap B is about 0.3 mm to 0.4 even when the protective cap 32 of the interlink 30 is exposed to a temperature environment of about 300 degrees. If it is maintained at mm, it is an optimum condition to discharge hot exhaust gas to the outside without flame leakage.

However, when the outer cap (B) is fixed to about 0.1mm when the protective cap 32 of the interlink 30 is exposed to a temperature environment of 600 degrees or more, the protective cap due to the high temperature exceeding the set temperature ( 32, the outer edge surface is squeezed with the seating surface (3a) of the connecting portion 3, the risk that the outer gap (B) is missing is greatly increased.

In addition, when the protective cap 32 of the interlink 30 is exposed to a temperature environment of more than 300 degrees while the outer gap B is fixed at about 0.3 mm to 0.4 mm, due to a high temperature exceeding a set temperature. Even if the outer edge of the protective cap 32 is not squeezed to the seating surface 3a of the connecting portion 3, the risk that the outer gap B may not be maintained at about 0.3 mm to 0.4 mm may be greatly increased.

Therefore, the chamber height A is set in consideration of the rod exposure height H so that the outer gap B may be within about 0.3 mm to about 0.7 mm.

Therefore, even if the waste gate valve 10 is applied to the turbocharger of the gasoline engine which is relatively high temperature condition compared to the turbocharger of the diesel engine, it is possible to secure safety against flame leakage.

However, the chamber height A is set in consideration of the bush exposure height h so that the setting condition of the inner gap C can be maintained at about 0.35 mm under any temperature condition.

On the other hand, Figure 4 shows the operating state of the flame leakage blocking member constituting the universal waste gate valve according to the present embodiment.

As shown, when the hot exhaust gas leaks from the bypass passage 7, the hot exhaust gas is discharged from the interlink 30 by using a main leakage path formed by a gap between the gate rod 50 and the bush 60. The protective cap 32 exits to the inner gap C formed between the connecting portions 3 of the turbocharger 1 wrapped therein, and then the high-temperature exhaust gas exiting the inner gap C is transferred to the protective cap 32. Using the sub-leakage path formed by the chamber K is spread to the interior space of the chamber (K).

Here, the inner gap C is maintained at about 0.35 mm.

Therefore, in addition to the main leakage path formed by the gap between the gate rod 50 and the bush 60, the leakage path before the hot exhaust gas escapes to the outside through the outer gap B, the protective cap of the interlink 30 Through the 32, the inner space of the chamber K may be as long as the sub-leakage path formed.

From this, the hot exhaust gas is maintained in the gas state rather than the flame state due to the main leakage path and the subsequent sub-leakage path even though the flame is formed.

Subsequently, the hot exhaust gas exiting the inner space of the chamber K exits through the outer gap B, and is discharged to the outside while maintaining the gas state through the outer gap B in the process. Leak risk is avoided.

Here, the outer gap B is maintained at about 0.3 mm to 0.4 mm, and at least 0.1 mm is maintained even at a high temperature condition such as a gasoline engine.

As described above, the general-purpose waste gate valve 10 according to the present embodiment includes a chamber K surrounding the connecting portion 3 through which the exhaust gas leaked from the bypass passage 7 connected to the turbocharger 1 is discharged. An inner gap C formed in the inner space of the chamber K, and the exhaust gas exiting the connecting portion 3 spreads to the chamber K, and is filled in the chamber K. The outer gap B, through which the gas is discharged to the outside, has a flame leakage blocking member 20 formed between the outer edge surface of the chamber K and the seating surface of the connecting portion 3, so that the exhaust gas discharged to the outside is further discharged. By forming a long leakage path, it is possible to fundamentally prevent the possibility of being discharged into flame leak, and in particular, it is possible to secure flame leakage even in a turbocharger of a gasoline engine, which is relatively hot compared to a turbocharger of a diesel engine. Will be.

1: turbocharger 2: connection housing
3: connection part 3a: seating surface
7: Bypass passage 10: General purpose waste gate valve
11: actuator 12: operation rod
20: flame leakage blocking member 30: interlink
31: connecting body 32: protective cap
33: shaft hole 40: fastening rod
50: gate rod 60: bush
60a: top 70: gate
A: Chamber height B: Outer clearance
C: Inner clearance D: Shaft bore diameter
H: Rod exposure height h: Bush exposure height
K: chamber

Claims (7)

An actuator which is a power source;
A manipulation rod that is pulled or pushed by the actuator;
A chamber is formed to surround the connection portion through which the exhaust gas leaked from the bypass passage connected to the turbocharger is formed, and an inner gap C through which the exhaust gas from the connection portion is diffused into the chamber is formed in the inner space of the chamber. A flame leakage blocking member having an outer gap B through which the exhaust gas filled in the chamber is discharged to the outside, formed between an outer edge of the chamber and a seating surface of the connection part;
A gate which is operated through the flame leakage blocking member connected to the operation rod and which opens the exhaust gas passage of the bypass passage by the operation;
Universal waste gate valve comprising a.
The method of claim 1, wherein the flame leakage blocking member is provided with a protective cap surrounding the connecting portion at intervals with the seating surface of the connecting portion to form the chamber having an internal space, to form the outer gap (B), An interlink to which a manipulation rod and the gate are connected;
A gate rod coupled to the interlink, the gate rod coupled to the gate such that the gate opens an exhaust gas passage of the bypass passage;
A bush which receives the gate rod and penetrates the connection part, and a portion protruding to the outside of the connection part is spaced apart from an inner surface of the chamber to form the inner gap C;
Universal waste gate valve, characterized in that consisting of.
The general-purpose waste gate valve according to claim 2, wherein the interlink is connected to the manipulation rod and the fastening rod, and the fastening rod is provided at an opposite portion of the protective cap to which the interlink is connected.
The method of claim 2, wherein the outer gap (B) is set to be maintained at least 0.1mm even if the temperature condition of the protective cap is 600 degrees or more, and the inner gap (C) is set to 0.35mm Universal waste gate valve.
The general-purpose waste gate valve according to claim 4, wherein the outer gap B is set within 0.3 mm to 0.7 mm.
The flame leakage blocking member is provided with an inner gap (C) through which the exhaust gas leaked out of the bypass passage and an outer gap (B) through which the exhaust gas is discharged to the outside, and is pulled by an actuator as a power source. A waste gate valve having a gate for opening the exhaust gas passage of the bypass passage through an operation through the flame leakage blocking member connected to the pushing rod;
A connecting housing connected to the bypass passage is provided, and the connecting housing is provided with a connecting portion surrounded by the chamber of the flame leakage blocking member, and the connecting portion is spaced apart from an outer edge of the chamber to form the outer gap B. A turbocharger having a seating surface formed thereon;
Turbocharger system comprising a.
The protection device of claim 6, wherein the flame leakage blocking member forms the chamber having an inner space and surrounds the connecting portion while spacing with a seating surface of the connecting portion such that the outer gap B is set within 0.3 mm to 0.7 mm. An interlink having a cap, wherein the operation rod and the gate are connected to each other;
A gate rod coupled to the interlink, the gate rod coupled to the gate such that the gate opens an exhaust gas passage of the bypass passage;
A bush which receives the gate rod and penetrates the connection part, and a portion protruding to the outside of the connection part is spaced apart from the inner surface of the chamber to set the inner gap C to 0.35 mm;
Turbocharger system characterized in that consisting of.

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