KR20010091754A - Flexible catalytic converter for exhaust pipe of automobiles - Google Patents

Abstract

PURPOSE: A flexible catalytic converter is provided to ensure space for exhaust system design and allow components of exhaust pipe to be installed in an easy manner. CONSTITUTION: A flexible catalytic converter comprises a catalyst cover(10) installed at a lower body of automobile, and which has a space(11) formed inside of the cover body and an inlet port(12) formed at a side of the space and an outlet port(13) formed at the other side of the space; a catalyst member(20) disposed within the space of the catalyst cover, and which purifies exhaust gas generated from an engine through oxidation or reduction action; a guide member(30) disposed inside of the inlet port of the catalyst cover, and which selectively slides so as to assist banding displacement caused by the vibration of engine to be smoothly performed; a support bracket(40) disposed in the rear of the guide member within the space of the catalyst cover, and which prevents leakage of exhaust gas and has a fixing surface(41) formed at an end of the bracket body; a bellows(50) disposed beneath the guide member and the support bracket, and which maintains air tightness of the exhaust gas emitted from the engine; and a buffer member(60) disposed within the inlet port of the catalyst cover in such a manner as to tightly contact the guide member.

Description

Flexible Catalytic Converter for Automotive Exhaust Pipes {FLEXIBLE CATALYTIC CONVERTER FOR EXHAUST PIPE OF AUTOMOBILES}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible catalytic converter for an automobile exhaust pipe, and more particularly, a flexible coupling installed in an exhaust pipe of an automobile is installed inside a catalyzed converter (CATALYTIC CONVERTER), which is a three-way catalyst, for designing an automobile exhaust pipe. It is invented to increase the ease of arrangement and design work of exhaust pipe components through securing.

Vehicles being developed today have increased engine power, resulting in increased engine roll vibrations when starting the engine, starting the car, braking, and shifting gears.

In addition, vibration of the exhaust pipe occurs according to the state of the road surface while driving.

Therefore, in general, an exhaust pipe having a muffler is connected to an engine of a vehicle to discharge exhaust gas, and a coupling pipe decoupling element is provided at the connection portion to absorb and cushion vibration displacement, impact load, thermal deformation, and the like. Is installed.

In addition, the exhaust pipe connector in such an installation position requires a robust yet compact product capable of self supporting the entire exhaust pipe with a small number of hanger mountings.

Therefore, the flexible coupling installed in the vehicle exhaust pipe absorbs displacement from the engine and road vibration while driving the vehicle, thereby improving ride comfort and extending fatigue life of the exhaust system, thereby improving durability.

Meanwhile, a catalytic converter, which is a three-way catalyst installed in an exhaust pipe of an automobile, is a kind of exhaust gas purifier for minimizing harmful gas emitted to the atmosphere.

In other words, it is a device that oxidizes or reduces harmful CO (carbon monoxide), HC (hydrocarbon), NOx (nitrogen oxide) contained in exhaust gas of an engine using petroleum as fuel by using a catalyst.

In addition, platinum (Pt), palladium (Pd), rhodium (Rh) and the like are used as components used as a catalyst in the catalytic converter.

In addition, the conventional catalytic converter has a predetermined size, and is provided with a suction port 1 and an discharge port 2 at both sides, and a catalyst cover 3 having a space part therein, and the catalyst cover 3. Located inside of the catalyst member 4 for oxidizing or reducing the harmful gas discharged to the atmosphere by the oxidation or reduction reaction, and located in the outer portion of the catalyst member 4, preventing the flow and buffering of the catalyst member (4) And a mat member 5 which performs adiabatic action.

Since the conventional flexible coupling and the catalytic converter configured as described above are used independently of each other in the exhaust pipe of the vehicle, there is a problem that it is difficult to secure the installation space in the exhaust pipe.

That is, when the relatively long type flexible coupling is installed in the exhaust pipe, the work space and the exhaust pipe design are complicated due to the narrowing of the installation space of each component forming the exhaust pipe.

An object of the present invention is to install a flexible coupling installed in the exhaust pipe of the car to the inside of the three-catalyst catalytic converter to increase the convenience of arrangement and design work of the exhaust pipe components through the secure space in the design of the automotive exhaust pipe To provide a flexible catalytic converter for automotive exhaust pipes.

Another object of the present invention is to provide a flexible catalytic converter for an automobile exhaust pipe that can improve the reliability and commerciality of the product.

1 is a plan sectional view showing an internal shape of a flexible catalytic converter for an automobile exhaust pipe according to the present invention.

Figure 2 is a front sectional view showing the internal shape of the flexible catalytic converter for automobile exhaust pipe of the present invention.

Figure 3 is a plan sectional view showing one embodiment of the present invention.

Figure 4 is a partially cut perspective view showing the shape of a conventional catalytic converter.

* Description of the symbols for the main parts of the drawings *

10-catalyst cover 11-space

12-Inlet 13-Outlet

20-Catalyst 21-Mat

30-guide member 31-contact surface

40-diaphragm support bracket 41-fixed surface

50-Bellows 60-Shock Absorber

61-Meshing 62-Guideway

70-sleeve member 71-front sleeve member

72-Rear sleeve member 73-Expansion pipe

80-coil spring 90-cover member

91-Supporting jaw R-Radius of curvature

C-exercise point

The object of the present invention, having a predetermined width and size is installed on the underbody of the vehicle, the space portion 11 is formed inside the body, the suction port 12 is formed on one side of the space portion 11 It is provided, the other side and the catalyst cover 10, the outlet 13 is located;

A catalyst member (20) positioned in the inner space part (11) of the catalyst cover (10) and purifying exhaust gas generated from an engine side by an oxidation or reduction action;

A guide member (30) positioned inside the inlet (12) of the catalyst cover (10) to selectively slide the bending motion during bending displacement generated from engine vibration and road vibration;

The inner side of the inner cover 11 of the catalyst cover 10 is provided with a predetermined interval toward the rear side of the guide member 30 to prevent leakage of the exhaust gas, the fixed surface 41 is formed at the end of the body Diaphragm support bracket 40;

A bellows (50) positioned below the guide member (30) and the diaphragm support bracket (40) to maintain the airtightness of the exhaust gas generated from the engine side, and to absorb expansion and bending;

It is achieved by being configured to be in close contact with the guide member 30 in the inlet 12 of the catalyst cover 10 is composed of a buffer member 60 to guide the buffer and the bending of the guide member (30).

Accordingly, the present invention provides a flexible catalytic converter for automobile exhaust pipe that absorbs displacement from the engine and road surface vibration while driving the vehicle inside the catalyst cover 10 of the catalytic converter which purifies exhaust gas generated from the engine side by oxidation or reduction. Since the bellows 50 and the shock absorbing member 60 are installed, it is possible to easily secure the space when designing the vehicle exhaust structure to improve the exhaust pipe design and installation convenience.

Therefore, it is possible to prevent problems caused by the reliability of the product and the narrowing of the installation space of the exhaust pipe.

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

1 is a plan sectional view showing an internal shape of a flexible catalytic converter for an automobile exhaust pipe according to the present invention.

Figure 2 is a front sectional view showing the internal shape of the flexible catalytic converter for automobile exhaust pipe of the present invention.

3 is a plan sectional view showing an embodiment of the present invention.

4 is a partially cutaway perspective view of the shape of a conventional catalytic converter.

That is, as shown in FIGS. 1 to 4, the catalyst cover 10 of the flexible catalytic converter for an automobile exhaust pipe according to the present invention has a hollow space portion 11 formed inside the body, whereby the catalyst member 20 may be embedded. To help.

The catalyst member 20 is purified by oxidation or reduction in the process of the exhaust gas generated from the engine side is moved to the muffler side, and one or more functions according to the composition of the components are the same as those conventionally known.

In addition, the inlet 12 is opened at one side of the space 11, and the outlet 13 is opened at the other side, so that the outlet 13 is piped in an airtight state and an exhaust pipe, and the flexible inlet 12 is provided at the inlet 12. The bellows 50 having a function and the shock absorbing member 60 can be installed.

At this time, the bellows 50 and the buffer member 60 inside the inlet 12 of the catalyst cover 10 has an extended shape of the catalyst cover 10 so as to be installed smoothly, and the support jaw (at the end) A cover member 90 provided with 91 is attached.

The cover member 90 is formed by integrally extending the body of the catalyst cover 10 from the body front portion of the catalyst cover 10, or as described above, the bellows 50 and the buffer member 60 have a space 11 The cover member 90 is designed to be reattached in order to be easily installed in the inside), and is formed in a state where the internal airtightness is maintained by the butt welding method together with the plate support bracket 40 to be described later. .

As a result, the cover member 90 formed around the inlet 12 of the catalyst cover 10 maintains a space in which the buffer member 60 can be installed between the guide members 30 inserted into the inside of the catalyst cover 10. When the expansion and contraction and bending displacements in the longitudinal direction are generated between the support jaw 91 and the contact surface 31 of the guide member 30, the shock absorbing member 60 is compressed and slides to absorb the displacement. .

The mesh ring 61 is used as the buffer member 60.

The reason why the meshing 61 is used as the cushioning member 60 is that the mesh is woven from thin wires in consideration of the characteristics of having semi-permanent elasticity to be restored after being compressed in any direction and easier to form. The mesh ring 61 which is compressed and molded into a ring shape is used.

In addition, the guide member (30) to one side of the bottom surface of the body of the buffer member 60 so that the guide member 30 can selectively slide in the surface contact state in close contact with the contact surface 31 of the guide member (30). A guide surface 62 is formed with a radius of curvature R corresponding to the contact surface 31 of the surface.

Therefore, the mesh ring 61 used as the shock absorbing member 60 is in contact with the guide member 30 in a state of being closely fixed to the inner support jaw 91 of the cover member 90, so that the guide member (when bending displacement occurs) 30) slides to act as a buffer and absorb the banding displacement.

Friction is repeated on the contact surface 31 of the guide member 30 repeatedly during bending, lubricating coating with a suitable surface treatment means such as graphite coating or insulation coating for reducing the friction noise when sliding, to prevent abrasion to improve durability It is preferable to process.

On the other hand, in the inner space 11 of the catalyst cover 10, the catalyst member 20 for purifying the exhaust gas generated from the engine side by the oxidation or reduction action is carbon monoxide (CO), hydrocarbons contained in the exhaust gas (HC) and nitrogen oxides (NO _Z ) to perform the function of oxidizing or reducing to remove.

In addition, a mat 21 is installed outside the catalyst member 20 to prevent flow and breakage of the catalyst member 20 between the catalyst cover 10 and the catalyst member 20.

That is, since the catalyst member 20 positioned in the center of the inner space 11 of the catalyst cover 10 is firmly fixed inside the catalyst cover 10 by the mat 21, the catalyst member 20 due to flow. This can prevent the breakage.

In addition, the mat 21 is preferably a wire mesh type or a mixture of asbestos and wire mesh for durability.

On the other hand, the inside of the inlet 12 of the catalyst cover 10 is provided with a guide member 30 to smoothly bend the bending motion while selectively sliding during the bending displacement generated from the engine vibration and road surface vibration.

The guide member 30 has a predetermined radius of curvature R and a contact surface 31 so as to induce a bending motion while sliding in a contact state at the time of bending displacement with the buffer member 60 to be described later in the center of the body. It is formed.

That is, as shown in FIG. 1, when the bending displacement occurs, the guide member 30 is in contact with the buffer member 60, and thus, the guide member 30 of the buffer member 60 is based on the movement center point C of the bellows 50 to be described later. In the state where the contact surface 31 of the guide surface 62 and the guide member 30 are in contact with each other, the bending displacement can be absorbed and buffered while being slid within a predetermined angle θ range.

On the other hand, the predetermined angle (θ) that the above-described guide member 30 is slid when the bending displacement occurs, the center of motion (C) and the radius of curvature (R) according to the characteristics and the type of the product is adjusted according to the characteristics of the product It is preferable to use.

In addition, the reason for setting the bending center point as the center of motion (C) of the bellows 50 is to induce the bellows 50 to pure angular motion while inducing stress to the lowest to have long life durability. It is set as follows.

In addition, the rear side of the guide member 30 is formed with a diaphragm support bracket 40 having a fixed surface 41 is formed at the end of the body at a predetermined interval.

The diaphragm support bracket 40 protects the bellows 50 and the coil spring 80 to be described later from the exhaust gas discharged at a high temperature, and is located opposite to the other side of the guide member 30. 50) and serves to support the other end of the coil spring (80).

The diaphragm support bracket 40 is formed at a predetermined interval so as to secure a range of motion in which the guide member 30, the coil spring 80, and the bellows 50 can be moved during bending displacement.

Here, the coil spring 80 is located between the guide member 30 and the diaphragm support bracket 40 to push the guide member 30 in the direction of the shock absorbing member 60 so that the guide member 30 absorbs the shock absorbing member 60. ) To make contact with

Therefore, the guide member 30 is always in contact with the shock absorbing member 60 by the coil spring 80, so that the bending motion occurs while the guide member 30 slides in contact with the shock absorbing member 60 when a bending displacement occurs. It can induce and absorb and buffer the banding displacement.

In addition, a bellows 50 is installed below the guide member 30 and the diaphragm support bracket 40 to maintain the airtightness of the exhaust gas generated from the engine side and absorb the expansion and bending.

In addition, inside the bellows 50, the front sleeve member 71 and the rear smoothly guide the flow of the exhaust gas around the center of the bellows 50, and protect the bellows 50 from the high temperature exhaust gas. Sleeve member 72 is installed.

In addition, since the front sleeve member 71 and the rear sleeve member 72 are formed to be separated from each other with respect to the center of the body, the front sleeve member 71 and the bellows 50 and the guide member 30 when the bending displacement occurs. Together, they can absorb and induce banding displacements.

In addition, an expansion pipe portion 73 is formed at the rear end of the rear sleeve member 72 to facilitate the flow of the exhaust gas.

That is, since the expansion portion 73 is formed to be opened to the rear end of the rear sleeve member 72 to the outside, the exhaust gas can be more easily moved in the direction of the catalyst member (20).

Meanwhile, as shown in FIG. 3, the flexible coupling, that is, the diaphragm support bracket 40 and the guide member 30, installed at the front end suction port 12 side of the catalyst cover 10 to absorb and buffer the bending displacement. Position the coil spring 80 and the bellows 50 to absorb the bending displacement therebetween, and the buffer member 60 between the guide member 30 and the support jaw 91 bent at the end of the cover member 90. It is preferable to install each.

In addition, the front sleeve member 71 and the rear sleeve member 72 are provided to protect the bellows 50 from the high temperature exhaust gas, and the exhaust gas flows more easily at the front end of the rear sleeve member 72. To expand the discharge portion 73 is formed.

Therefore, by simultaneously installing the displacement absorbing and cushioning parts in the outlet 13 side of the catalyst cover 10 in a symmetrical symmetry with the tip inlet 12 side, the effect of buffering and absorbing the displacement from the engine and road vibration while driving the vehicle Can be increased.

In the above-described flexible catalytic converter for automobile exhaust pipe of the present invention, the engine and the road surface vibration while driving the vehicle on one side or both sides of the catalyst cover 10 of the catalytic converter for purifying exhaust gas generated from the engine side by oxidation or reduction action, respectively. By providing a flexible coupling function for absorbing displacement from the vehicle, it is possible to easily secure space in the design of the vehicle exhaust structure and to improve the workability of installing the exhaust pipe components.

Therefore, the problem caused by the lack of space in the design and mounting of the exhaust pipe components as in the prior art can be solved.

In addition, since the installation space can be reduced while performing the role of the catalytic converter and the flexible coupling, the space utilization rate of the exhaust pipe component can be increased.

Therefore, it is a very useful invention that can improve the reliability and commerciality of the product.

Claims (7)

It is installed in the underbody of the car with a predetermined width and size, the space portion 11 is formed inside the body, the suction port 12 is provided on one side of the space portion 11, the discharge port on the other side A catalyst cover 10 in which 13 is located; A catalyst member (20) positioned in the inner space part (11) of the catalyst cover (10) and purifying exhaust gas generated from an engine side by an oxidation or reduction action; A guide member (30) positioned inside the inlet (12) of the catalyst cover (10) to selectively slide the bending motion during bending displacement generated from engine vibration and road vibration; The inner side of the inner cover 11 of the catalyst cover 10 is provided with a predetermined interval toward the rear side of the guide member 30 to prevent leakage of the exhaust gas, the fixed surface 41 is formed at the end of the body Diaphragm support bracket 40; A bellows (50) positioned below the guide member (30) and the diaphragm support bracket (40) to maintain the airtightness of the exhaust gas generated from the engine side, and to absorb expansion and bending; Flexible catalyst for automobile, characterized in that it is positioned in close contact with the guide member 30 inside the suction port 12 of the catalyst cover 10 to guide the buffer and the bending of the guide member 30 Retic converter. The method of claim 1, wherein the guide member 30, the diaphragm support bracket 40, the bellows 50 and the buffer member 60 is the catalyst cover 10 front inlet 12 side and the rear outlet 13 side Flexible catalytic converter for automobile exhaust pipe, characterized in that installed on each symmetrical. According to any one of claims 1 to 3, wherein the center portion of the guide member 30 to induce bending motion while sliding in the grounded state with the guide surface 62 of the buffer member 60 when the bending displacement occurs. , Flexible Catalytic Converter for automobile exhaust pipe, characterized in that the contact surface 31 is formed with a predetermined radius of curvature (R). The coil spring (1) according to any one of claims 1 to 3, wherein the guide member (30) is in close contact with the buffer member (60) between the guide member (30) and the diaphragm support bracket (40). Flexible Catalytic Converter for Automobile Exhaust Pipe, characterized in that it is installed. The vehicle exhaust of claim 1, wherein a cover member 90 having a support jaw 91 is attached to the front suction port 12 of the catalyst cover 10. Tolerant Flexible Catalytic Converter. The center of the bellows 50, wherein the guide member 30 slides in contact with the shock absorbing member 60 when the bending displacement occurs in the bellows 50 so as to induce a bending motion. A flexible catalytic converter for an automobile exhaust pipe, characterized in that the front sleeve member (70) and the rear sleeve member (72) are formed separately. The method according to claim 6, wherein the rear end portion of the body of the rear sleeve member 72 is formed in the flexible pipe for the exhaust pipe, characterized in that the expansion pipe portion 73 is formed to be opened to the outside in order to facilitate the flow of the exhaust gas more smoothly. Converter.