DE102016110470A1 - EXHAUST CHANNEL CONNECTION UNIT FOR CATALYSTS AND MANUFACTURING METHOD FOR EXHAUST CHANNEL CONNECTION UNIT FOR CATALYSTS - Google Patents

Abstract

An exhaust passage connecting unit (100) for a catalyst (30) for connecting a turbocharger (20) and a warming-up catalyst (30) provided on a downstream side of the turbocharger (20), comprising a flange (110), one end thereof is attached to the turbocharger (20), and a connecting member (120) formed using a single cylindrical tube by bending, (cutting) and hydroforming, and wherein one end of the tube with the other end of the flange (110) and the other end of the tube is connected to the warm-up catalyst (30).

Description

Cross-reference to related application

This application claims the benefit of the priority of Korean Patent Application No. 10-2015-0174456 filed with the Korean Intellectual Property Office on 8 December 2015, the entire contents of which are incorporated herein by reference.

Field of the invention

The present disclosure relates to an exhaust duct connecting unit for a catalyst and a method of manufacturing the exhaust duct connecting unit. More particularly, the present disclosure relates to an exhaust passage connecting unit for a catalyst (e.g., exhaust gas catalyst) connecting a turbocharger (e.g., exhaust gas turbocharger) and a warming-up catalyst provided in an exhaust passage that discharges exhaust gas to the outside.

Background of the invention

In general, a turbocharger is provided in a vehicle to achieve greater power output.

An engine (eg, internal combustion engine) employing the turbocharger (eg, exhaust gas turbocharger) sucks and compresses exhaust gas and / or outside air by means of a compressor of the turbocharger, and the charge air (eg, high-hot compressed air) generated by the compression is supplied to the engine fed.

Such a turbocharger may e.g. be connected to a warm-up catalyst by a cone-shaped exhaust passage connecting unit, wherein the exhaust passage connection unit serves as a path for supplying exhaust gas to the warm-up catalyst.

Here, a conventional exhaust passage connecting unit may include a flange attached to the turbocharger and a connecting pipe formed of an upper cone member and a lower cone member which are connected to each other by welding, and to which the flange at a front end thereof by means of welding is appropriate.

However, such a conventional exhaust passage connecting unit is over-welded because the respective individual members are joined together by welding and the conventional exhaust passage connecting unit is made of a molded material to be resistant to high heat, so that the weight of the exhaust passage connecting unit is increased.

Further, since a material property in the welded portion may change due to the high-heat exhaust gas, an exhaust leak may occur at the welded portion, thereby deteriorating durability and efficiency.

Accordingly, a vehicle equipped with the turbocharger needs improvement of a structure of the exhaust passage connecting unit connecting the turbocharger and the warm-up catalyst because the vehicle is subjected to considerable vibration and temperature fluctuation.

The above information disclosed in this Background section is only for enhancement of understanding of the background of the disclosure / invention, and thus it may include information that does not form the prior art, as it is already known in this country to a person skilled in the art.

Explanation of the invention

The present disclosure has been made in an effort to provide an exhaust passage connecting pipe for a catalyst of which a flange and a connecting member made of the same material are made to connect a turbocharger and a warming-up catalyst provided in an exhaust pipe, through which exhaust gas is exhausted to the outside, thereby reducing the weight of the exhaust passage connecting unit and capable of minimizing a weld portion (thereby preventing exhaust leakage and improving durability, and a method of manufacturing the same provide.

An exhaust passage connecting unit for a catalyst according to an exemplary embodiment of the present disclosure is provided for connecting the turbocharger and the warming-up catalyst, the exhaust passage connecting unit comprising: a flange, one end of which is attached to the turbocharger ), and a connecting member formed using a single cylindrical tube from a single piece by bending, (cutting) cutting and hydroforming (eg hydroforming), and one end connected to the other end of the flange is and the other end is connected to the warm-up catalyst.

The flange may include a connecting portion connected to the turbocharger and an insertion portion inserted in the connecting member.

A holding step, of which one end of the connecting member is held, may be formed between the connecting portion and the insertion portion.

The flange may e.g. formed by forming austenite-based carbon alloy steel.

The connecting member may be formed by shaping / forming a cylindrical pipe into a "U" (or a shape corresponding to the character "U") by bending-forming, (cutting) the U-shaped pipe, and then Expanding the entire shape and lateral ends of each cut pipe by hydroforming.

At least one sensor installation hole penetrating from the inside to the outside may be formed on the connection member.

The connecting element may be made of austenite-based carbon alloy steel.

According to another exemplary embodiment of the present disclosure, there is provided a method of manufacturing an exhaust passage connecting unit for a turbocharger (e.g., exhaust gas turbocharger) and a warming-up catalyst provided on a downstream side (e.g., turbine output side) of the turbocharger. The method may comprise: forming a flange by forming, transforming a central portion of a single cylindrical tube made of the same material as the flange into the shape of a ("U") by means of bending-forming, (in) Cutting the U-shaped tube to reshape the U-shaped tube into the shape of an ("L") shape, forming a connector by reshaping the entire outer appearance of the tube after (cutting) and flaring the lateral ends of the tube -) cut pipe by hydroforming, and attaching the flange at one end of the formed connecting element by means of welding.

The flange and the connector may be made of austenite-based carbon alloy steel.

Brief description of the drawings

1 FIG. 12 is a perspective view of an exhaust passage system to which an exhaust passage connecting unit for a catalyst according to an exemplary embodiment of the present disclosure / invention is applied.

2 FIG. 12 is a perspective view of an exhaust passage connecting unit for the catalyst according to an exemplary embodiment of the present disclosure. FIG.

3 is a cross-sectional view of 2 along the line AA.

4 FIG. 12 illustrates a manufacturing process of a connector used in the exhaust passage connecting unit for the catalyst according to an exemplary embodiment of the present disclosure.

5 FIG. 10 is a process block diagram of a method of manufacturing an exhaust duct connection unit for a catalytic converter according to an exemplary embodiment of the present disclosure. FIG.

Detailed description

An exemplary embodiment of the present disclosure / invention will be described below in detail with reference to the accompanying drawings.

An exemplary embodiment described in this specification and a configuration shown in the drawing (s) are merely (each) an exemplary embodiment of the present disclosure / invention and are not an overall technical idea of the present disclosure / invention, and thus should be understood various variations and exemplary variations that may substitute the exemplary embodiment may exist and remain within the scope of this disclosure / invention.

The drawing and description are to be considered in their nature as illustrative and not restrictive. Like reference numerals refer to like elements throughout the description.

Furthermore, a size and thickness of each element are shown in the drawings for ease of understanding and simplifying the description. The present disclosure / invention is not limited thereto, and the thickness of some portions and regions may be significantly increased.

In addition, unless expressly stated to the contrary, the word "having" and variations, e.g. "Indicates" or "having" to mean that it implies the inclusion of the elements referred to, but not the exclusion of any other element.

In addition, the terms "... unit", "... medium", "..." and "element" described in the specification mean a unit of a configuration for performing at least a function and a process.

1 FIG. 13 is a perspective view of an exhaust passage system to which an exhaust passage connecting unit for a catalyst according to an exemplary embodiment of the present disclosure / invention is applied; FIG. 2 FIG. 12 is a side view of an exhaust passage connecting unit for the catalyst according to an exemplary embodiment of the present disclosure / invention and FIG 3 is a cross-sectional view of 2 along the line AA.

Referring to 1 For example, an exhaust passage system in which an exhaust passage connection unit 100 for a catalyst is applied, a motor 10 (see eg M (= motor) in 1 ), a turbocharger 20 (eg exhaust gas turbocharger), a warm-up catalyst 30 and a (exhaust) silencer 40 (See eg S (= silencer) in 1 ) exhibit.

Out of the engine 10 (eg internal combustion engine) exhaust gas can pass through an exhaust manifold into the turbocharger 20 flow in, and through an outlet of the turbocharger 20 exhaust gas can pass through the warm-up catalyst 30 through the exhaust duct connection unit 100 be supplied through.

From the warm-up catalyst 30 discharged exhaust gas can through the muffler 40 be discharged through to the outside. A function of the warm-up catalyst 30 is known in the art, therefore no further description is provided.

The exhaust duct connection unit 100 for the catalyst can be applied to the turbocharger 20 with the warm-up catalyst 30 to connect, which on a lower side of the turbocharger 20 is arranged.

In this case, the exhaust gas passage connection unit 100 for the catalyst according to an exemplary embodiment of the present disclosure / invention, a flange 110 and a connecting element 120 exhibit.

The flange 110 may be attached to the turbocharger through one end thereof by means of bolted connection.

The flange 110 may be formed by forming austenite-based carbon alloy steel.

Such a flange 110 can have a connection section 112 that with the turbocharger 20 is connected, and an insertion section 114 have around the connecting portion 112 is extended out of a (single) common part, and that into the connecting element 120 is used.

An outer diameter of the Einsetzabschnittes 114 may be smaller than an inner diameter of the connecting element 120 so that the insertion section 114 in one end of the connecting element 120 can be used. In addition, the insertion portion 114 on the connecting element 120 be attached by means of welding, being stuck in the connecting element 120 is fitted.

The insertion section 114 can doubly with the connecting element 120 Be overlapped to provide a heat-blocking function between the flange 110 and the connecting element 120 provide.

Accordingly, it can be prevented that an end portion of the connecting element 120 high-temperature exhaust gas is exposed directly. Thus, thermal deformation and exhaust leakage at an end portion of the connecting member 120 attached to the flange 110 is fixed, thereby improving durability and efficiency.

Here, a holding level (eg holding shoulder) 116 from which one end of the connecting element 120 is held, between the connecting portion 112 and the insertion section 114 be formed. When the insertion section 114 in the connecting element 120 is used, the holding level 116 one end of the connecting element 120 touch so that it can be determined whether the insertion section 114 is completely used or not.

In addition, the connecting element 120 be formed by bending, (cutting) and / or hydroforming a shape of a single cylindrical tube from a (single) piece, and an end of the connecting element 120 can with the other end of the flange 110 be connected, and the other end of the connecting element 120 can with the warm-up catalyst 30 be connected.

4 FIG. 10 illustrates a method of manufacturing the connector used in the exhaust duct connection unit for the catalytic converter according to an exemplary embodiment of the present disclosure.

Referring to 4 For example, a cylindrically shaped straight conduit may be bend formed (S1) such that a middle portion of the connecting element 120 Becomes U-shaped (or receives a shape corresponding to the character "U") (S2). Thereafter, the center of the U-shaped connecting element 120 in two parts (S3), and each of the two parts can be cut so as to become L-shaped (or to obtain a shape corresponding to the character "L") (S4) ,

Then, the L-shaped pipe can be reshaped by hydroforming after completion of (cutting) to widen the entire shape and lateral ends of the pipe (S5).

Here are two sensor mounting holes 122 , each penetrating from the inside to the outside, on the connecting element 120 be provided. A sensor (not shown) that detects a property of exhaust gas may be in the sensor mounting hole 122 to be appropriate.

The connecting element 120 As stated above, it may be made of austenite-based carbon alloy steel.

Hereinafter, a method of manufacturing the exhaust passage connecting unit for the catalyst as configured above according to an exemplary embodiment of the present disclosure / invention will be described in detail.

5 FIG. 10 is a process block diagram of a method of manufacturing an exhaust duct connection unit for a catalytic converter according to an exemplary embodiment of the present disclosure. FIG.

Referring to 5 For example, a method of fabricating an exhaust passage according to an exemplary embodiment of the present disclosure may include manufacturing the flange 110 by forming using austenite-based carbon alloy steel (S10) and bending-forming a central portion of a single cylindrical tube made of austenite-based carbon alloy steel, which may be the same material as that Austenite-based carbon alloy steel (S20), in the shape of a (character) "U".

Next, the U-shaped cylindrical tube may be cut twice from (or between) the lateral ends of the tube to form, after bending forming, an L-shape from the shape of the tube sections "L" corresponding shape) (S30).

The entire outer shape of the L-shaped tube can be reshaped by hydroforming, wherein the lateral ends of the L-shaped tube can be widened, so that the connecting element 120 is made (S40).

The flange 110 can on the connecting element 120 fixed by means of welding, wherein the Einsetzabschnitt 114 in one end of the connecting element 120 is inserted (S50), so that the exhaust duct connection unit 100 is made.

Thus, when the exhaust passage connection unit 100 is used for the catalyst and the method for producing the same according to an exemplary embodiment of the present disclosure / invention, the flange can 110 and the connecting element 120 be made of the same material to the turbocharger 20 and the warm-up catalyst 30 , which are provided in the exhaust pipe, through which the exhaust gas is discharged to the outside, to connect such that the weight of the exhaust gas passage connection unit 100 can be reduced and a welding section can be reduced, whereby exhaust leakage is prevented and durability and efficiency are improved.

In addition, the connecting element 120 integral with the flange 110 be formed (eg from a (single common) piece like the flange 110 by molding a single cylindrically-shaped tube by means of bending-forming and hydroforming, so that formability and productivity can be further improved as compared with a conventional technique.

Furthermore, a welding process can be omitted except for (re) forming the flange 110 (ie for attaching the insertion portion 114 of the flange 110 on the connecting element 120 by means of welding), and accordingly heat damage (caused by exhaust gas) and a change (caused by exhaust gas) of physical properties of the connecting element 120 be prevented.

Although this disclosure / invention has been described in conjunction with what is presently considered to be practical exemplary embodiments, it is to be understood that the disclosure / invention is not limited to the disclosed embodiments, but is intended to cover various modifications and related arrangements which are included in the spirit and scope of the appended claims.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• KR 10-2015-0174456 [0001]

Claims (9)

Exhaust gas channel connection unit ( 100 ) for a catalyst ( 30 ) for connecting a turbocharger ( 20 ) and a warm-up catalyst ( 30 ) located on a downstream side of the turbocharger ( 20 ), comprising: a flange 110 of which one end is attached to the turbocharger, and a connecting element ( 120 ) integrally formed using a single cylindrical tube by bending, cutting and hydroforming, one end of the tube being connected to the other end of the flange ( 110 ) and the other end of the tube is connected to the warm-up catalyst ( 30 ). Exhaust gas channel connection unit ( 100 ) for the catalyst ( 30 ) according to claim 1, wherein the flange ( 110 ) comprises: a connection section ( 112 ), with the turbocharger ( 20 ) and an insertion section ( 114 ), which in the connecting element ( 120 ) is used. Exhaust gas channel connection unit ( 100 ) for the catalyst ( 30 ) according to claim 2, wherein a holding stage ( 116 ), from which one end of the connecting element ( 120 ), between the connecting portion ( 112 ) and the insertion section ( 114 ) is trained. Exhaust gas channel connection unit ( 100 ) for the catalyst ( 30 ) according to claim 1, 2 or 3, wherein the flange ( 110 ) is formed by forming austenite-based carbon alloy steel. Exhaust gas channel connection unit ( 100 ) for the catalyst ( 30 ) according to one of claims 1 to 4, wherein the connecting element ( 120 ) is formed by forming a cylindrically shaped pipe into the shape of a "U" by bending-forming (S1, S2, S20), cutting the U-shaped pipe (S3, S4, S30), and then widening the entire shape and lateral ends of each cut pipe by hydroforming (S5; S40). Exhaust gas channel connection unit ( 100 ) for the catalyst ( 30 ) according to one of claims 1 to 5, wherein at least one sensor installation hole ( 122 ), which penetrates from the inside to the outside, on the connecting element ( 120 ) is trained. Exhaust gas channel connection unit ( 100 ) for the catalyst ( 30 ) according to one of claims 1 to 6, wherein the connecting element ( 120 ) is made of austenite-based carbon alloy steel. Method for producing an exhaust gas duct connection unit ( 100 ) for a catalyst ( 30 ) for connecting a turbocharger ( 20 ) and a warm-up catalyst ( 30 ) located on a downstream side of the turbocharger ( 20 ), comprising: producing a flange ( 110 ) by reshaping (S10), reshaping a central portion of a single cylindrical tube made of the same material as the flange into the shape of a "U" by bending forming (S1, S2, S20), cutting the U shaped tube to form the U-shaped tube in the shape of an "L" (S3, S4, S30), forming a connecting element (FIG. 120 by reshaping the entire outer appearance of the tube after the cutting step (S4; S30) and expanding lateral ends of the cut tube by hydroforming (S5; S40) and attaching the flange to one end of the deformed connecting element (S30; 120 ) by welding (S50). Method for producing the exhaust gas duct connection unit ( 100 ) for the catalyst ( 30 ) according to claim 8, wherein the flange ( 110 ) and the connecting element ( 120 ) are made of austenite-based carbon alloy steel.

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