JPH0538318U - Manifold converter - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention relates to a manifold converter,
An object of the present invention is to provide a manifold converter in which stepped wear of a catalyst carrier is prevented. A manifold converter in which a catalyst carrier 33 is housed in a cylindrical catalyst container 35 composed of a pair of half-split containers 35a and 35b, which is mounted substantially vertically to an exhaust gas exhaust port of an exhaust manifold. An annular groove 45 is formed on the outer circumference of the catalyst carrier 33 along the circumferential direction, and both shoulders 33c of the catalyst carrier 33 facing each other with the annular groove 45 sandwiched therebetween.
Buffer members 23 ′ and 23 ″ that restrict the movement of the catalyst carrier 33 in the axial direction are arranged at 33 d.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a manifold converter mounted on an exhaust gas outlet of an exhaust manifold.

[0002]

[Prior Art]

 Conventionally, a vehicle exhaust system is equipped with a catalytic converter for purifying exhaust gas under the floor, but recently, in addition to such a catalytic converter, for example, as disclosed in Japanese Utility Model Laid-Open No. 59-34012. Various manifold converters are installed in many vehicles.

4 to 6 show a conventional structure of a manifold converter of this type, in which 1 is a manifold converter, and the manifold converter 1 is connected to an exhaust gas exhaust port of an exhaust manifold 5 mounted on an engine 3. It is installed almost vertically.

In the manifold converter 1, an elliptical catalyst carrier 7 is housed in a body portion 11 of an elliptical catalyst container 9 composed of a pair of half-split containers 9 a and 9 b. The body portion 11 is continuously formed between the upstream diffuser 13 connected to the gas inlet 13a and the downstream diffuser 15 connected to the gas outlet 15a.

Then, the discharge ends of the four pipes 5 a, 5 b, 5 c, 5 d of the exhaust manifold 5 are assembled and connected to the gas inlet 13 a, and the gas outlet 15 a is connected to the flange portion 17. The exhaust outlet pipe 19 is connected to the flange portion 17.

On the other hand, an annular buffer member 23 is attached to the upper end surface 7a side of the catalyst carrier 7 via a holding frame 21 fixed to the inner circumference 11a of the body 11 of the catalyst container 9, The buffer member 21 is in contact with the upper end surface 7a of the catalyst carrier 7. Similarly, on the lower end surface 7b side of the catalyst carrier 7, an annular buffer member 23 is attached via a holding frame 21 fixed to the inner circumference 11a of the body portion 11, so that the catalyst carrier 7 The buffer member 23 is in contact with the lower end surface 7b.

Further, a support 25 and an interram mat 27 are arranged between the catalyst carrier 7 and the catalyst container 9, and the interram mat 27 prevents exhaust gas bypass. A shroud 29 is attached to the catalyst container 9 at a portion located outside the engine 3.

Therefore, according to such a manifold converter 1, the exhaust gas flowing from the exhaust manifold 5 into the catalyst container 9 is purified by the catalyst carrier 7, and then passes through the exhaust outlet pipe 19 to reach the downstream side. You will be guided to the silencer.

[0009]

[Problems to be solved by the device]

 However, in the manifold converter 1, since the catalyst container 9 expands and expands in the upward and downward directions due to the heat during operation, a clearance is provided between the buffer member 23 mounted on the holding frame 21 and the upper end surface 7a of the catalyst carrier 7. Occurs.

However, in the manifold converter 1, the catalyst carrier 7 is mounted on the exhaust manifold 5 such that the axial direction of the catalyst carrier 7 coincides with the vertical vibration and the direction of gravity when the vehicle is running. It will be vibrated in the vertical direction due to vibration during driving and engine vibration.

Therefore, when the manifold converter 1 is vertically vibrated in the state where a clearance is generated between the cushioning member 23 and the upper end surface 7 a of the catalyst carrier 7, the catalyst carrier 7 is vertically moved along with the vibration. As a result, there is a possibility that stepped wear may occur on the lower end surface 7b of the lower shock absorbing member 23 that collides with the buffer member 23 on the downstream side due to long-term use.

The present invention has been devised in view of such circumstances, and the heat generated during operation causes the catalyst container to extend upward and downward, resulting in a clearance between the upper end surface of the catalyst carrier and the catalyst container. Another object of the present invention is to provide a manifold converter in which vertical vibration of the catalyst carrier is prevented to prevent stepwise wear of the catalyst carrier.

[0013]

[Means for Solving the Problems]

 In order to achieve such an object, the invention according to claim 1 mounts a catalyst carrier in a cylindrical catalyst container which is mounted substantially vertically to an exhaust gas discharge port of an exhaust manifold and comprises a pair of half-split containers. In the manifold converter, an annular groove is formed on the outer periphery of the catalyst carrier along the circumferential direction, and the catalyst carrier is moved in the axial direction on both shoulders of the catalyst carrier facing each other with the annular groove in between. A cushioning member for regulating the above is arranged.

According to a second aspect of the present invention, in the manifold converter, the buffer member is opposed to the opposite surfaces of the shoulders of the catalyst carrier with the annular groove interposed therebetween via the holding frame fixed to the inner periphery of the catalyst container. They are abutted against each other.

Further, in the manifold converter according to a third aspect of the present invention, the catalyst container is provided with a concave portion projecting into an annular groove provided on the outer periphery of the catalyst carrier along the circumferential direction, and the annular groove is sandwiched between the concave portion and the annular groove. A cushioning member is fitted onto both shoulders of the catalyst carrier facing each other, and the cushioning member is brought into contact with the upper and lower inner peripheral surfaces of the recess.

[0016]

[Action]

 According to the first aspect of the present invention, the heat generated during operation causes the catalyst container to expand in the vertical direction, and a clearance is generated between the catalyst container and the catalyst carrier. Even if the manifold converter is vertically vibrated, the buffer member prevents the catalyst carrier from vibrating in the axial direction.

According to the second aspect of the present invention, the manifold converter is vertically vibrated by vibration during traveling or engine vibration in a state where the clearance is generated between the catalyst container and the catalyst carrier. However, the cushioning members, which are in contact with the facing surfaces facing each other across the annular groove, prevent the catalyst carrier from vibrating in the axial direction.

Further, according to the third aspect of the present invention, even if the manifold converter is vertically vibrated due to vibration during traveling or engine vibration in the state where the clearance is generated between the catalyst container and the catalyst carrier. The cushioning member that comes into contact with the upper and lower inner peripheral surfaces of the recess prevents the catalyst carrier from vibrating.

[0019]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view of a main part of a manifold converter according to a first embodiment of the present invention. In the figure, 31 is a manifold converter, and the manifold converter 31 is connected to an exhaust gas exhaust port of an exhaust manifold mounted on an engine. It is installed almost vertically.

In the manifold converter 31, the catalyst carrier 33 having an elliptical cross section is housed in the body portion 37 of the catalyst container 35 composed of a pair of half-split containers 35a and 35b, as in the conventional case. The catalyst container 35 has a body portion 37 continuously formed between the upstream diffuser 39 connected to the gas inlet 39a and the downstream diffuser 41 connected to the gas outlet 41a. Then, the exhaust ends of the pipes of the exhaust manifold are gathered and connected to the gas inlet 39a, and the gas outlet 41a is connected to the flange portion 43, and the exhaust outlet pipe is connected to the flange portion 43. There is.

On the other hand, on the side of the upper end surface 33a of the catalyst carrier 33, an annular cushioning member 23 is provided as in the prior art via a holding frame 21 having a substantially L-shaped cross section fixed to the inner circumference 37a of the body portion 37. The cushioning member 23 is in contact with the upper end surface 33a of the catalyst carrier 33. An annular buffer member 23 is also mounted on the lower end surface 33b side of the catalyst carrier 33 via a holding frame 21 fixed to the inner circumference 37a of the body portion 37, and the lower end surface 33b of the catalyst carrier 33 is mounted. The buffer member 23 is in contact with the structure.

Further, in the substantially central portion of the outer periphery of the catalyst carrier 33, one annular groove 45 having a constant width L is formed along the circumferential direction. Then, two holding frames 21 ′ and 21 ″ having substantially L-shaped cross-sections, whose back sides are in contact with each other, are provided in the inner circumference 37 a of the body portion 37 corresponding to the annular groove 45. It is protruding and fixed.

A buffer member 23 ′ is attached to the upper holding frame 21 ′, and the buffer member 23 ′ is one of the shoulders 33 c, 33 d of the catalyst carrier 33 facing each other across the annular groove 45. Is abutted against the facing surface 33e on the side of the one shoulder portion 33c. Similarly, the lower holding frame 21 ″ is provided with a cushioning member 23 ″ that abuts the facing surface 33 f on the side of the other shoulder 33 d, and a cushioning member abutting the upper and lower end faces 33 a and 33 b of the catalyst carrier 33. Together with 23, these buffer members 23 ′ and 23 ″ regulate the movement of the catalyst carrier 33 in the axial direction.

In addition, in FIG. 1, 47 is a support arranged between the catalyst carrier 33 and the body portion 37, and 49 is an interram mat for preventing exhaust gas bypass. Since the manifold converter 31 according to the present embodiment is configured in this way, the exhaust gas flowing from the exhaust manifold into the catalyst container 35 is purified by the catalyst carrier 33 and then discharged to the exhaust outflow pipe as in the conventional case. It will be guided to the muffler on the downstream side via.

When the catalyst container 35 expands and expands in the vertical direction due to the heat during operation, a clearance is generated between the upper end surface 33a of the catalyst carrier 33 and the buffer member 23 as in the conventional case. In the manifold converter 31 according to the example, since the cushioning member 23 'is in contact with the facing surface 33e as described above, the cushioning member 23' regulates the downward movement of the catalyst carrier 33, and at the same time, the other facing surface is opposed. The cushioning member 23 ″ comes into contact with the surface 33f, and the cushioning member 23 ″ regulates the upward movement of the catalyst carrier 33.

Therefore, even if the manifold converter 31 is vibrated in the vertical direction due to vibration during traveling or vibration of the engine while a clearance is generated between the upper end surface 7 a of the catalyst carrier 7 and the buffer member 23. The catalyst carrier 33 does not vibrate vertically and its lower end surface 33b does not collide with the buffer member 23 on the downstream side. Therefore, according to the present embodiment, the step of the lower end surface 33b of the catalyst carrier 33 is prevented. It has become possible to prevent abrasion.

In the first embodiment described above, the rear surfaces of the two holding frames 21 ′ and 21 ″ having a substantially L-shaped cross section are brought into contact with each other and fixed to the inner circumference 37 a of the body portion 37. However, the present invention is not limited to such a structure.

That is, for example, as in the manifold converter 51 of the second embodiment shown in FIG. 2, an annular groove 45 ′ having a width L ′ larger than the annular groove 45 is provided at a substantially central portion of the outer periphery of the catalyst carrier 33 ′. When provided, a cushioning member 23 'that comes into contact with the facing surface 33e' on the one shoulder 33c 'side of the shoulders 33c', 33d 'of the catalyst carrier 33' facing each other with the annular groove 45 'interposed therebetween is provided. The cushioning member 23 ″ is attached to the lower holding frame 21 ″ which is attached to the upper holding frame 21 ′ and is fixed to the inner circumference 37 a of the body portion 37 apart from the holding frame 21 ′, and the cushioning member 23 ″ is attached. The member 23 ″ may be brought into contact with the facing surface 33f ′ on the side of the other shoulder portion 33d ′.

Since the other configurations are the same as those of the first embodiment, the description thereof is omitted here, and the same components are denoted by the same reference numerals. Thus, even with such a structure, the intended purpose can be achieved as in the first embodiment.

FIG. 3 shows a third embodiment of the present invention. This embodiment is the same as each of the above-described embodiments, while preventing the stepwise wear of the catalyst carrier while each of the holding frames 21, 21 ′, 21 ″. The third embodiment will be described below with reference to Fig. 3. In the present embodiment, the same parts as those in the above-mentioned embodiments are designated by the same reference numerals. And their explanation is omitted.

In the figure, 53 indicates a manifold converter, and the manifold converter 53 has a catalyst carrier 33 ′ housed in a body 57 of a catalyst container 55 composed of a pair of half-split containers 55 a and 55 b. Similar to the catalyst container 35 in FIG. 1, the catalyst container 55 has a body portion 57 connected continuously between the upstream diffuser 59 connected to the gas inlet 59a and the downstream diffuser 61 connected to the gas outlet 61a. Formed and composed.

A buffer member 63 on the upstream side is externally fitted to the upper end surface 33a 'of the catalyst carrier 33' in a peripheral portion thereof in a substantially L-shaped cross section, and on the lower end surface 33b 'of the catalyst carrier 33'. Also, a buffer member 63 on the downstream side is externally fitted to the peripheral portion, and the catalyst carrier 33 ′ is housed in the body portion 57 of the catalyst container 55 via these buffer members 63.

Further, cushioning members 65 and 67 are externally fitted to the shoulder portions 33c 'and 33d' of the catalyst carrier 33 ', which are opposed to each other with the annular groove 45' interposed therebetween, in a substantially L-shaped cross section. Further, the body portion 57 of the catalyst container 55 is formed with a concave portion 69 projecting into the annular groove 45 'along the circumferential direction thereof, and the buffer members 65 and 67 are provided above and below the concave portion 69. It has a structure in which it abuts on the inner peripheral surface. Then, together with the cushioning members 63 fitted on the upper and lower end surfaces 33a 'and 33b' of the catalyst carrier 33 ', the cushioning members 65 and 67 regulate the vibration of the catalyst carrier 33' in the axial direction. ing.

Since the present embodiment is configured as described above, even if the catalyst container 55 expands and expands in the vertical direction due to the heat during operation and a clearance is generated between the buffer member 63 and the catalyst container 55. The cushioning members 65 and 67 respectively come into contact with the upper and lower inner peripheral surfaces of the recess 69 to prevent the catalyst carrier 33 'from vibrating.

Therefore, according to this embodiment as well, stepped wear of the lower end surface 33b 'of the catalyst carrier 33' can be prevented. Further, according to the present embodiment, since the holding frames 21, 21 ', 21 "of the first and second embodiments are eliminated, there is an advantage that the number of parts can be reduced.

[0036]

[Effect of the device]

 As described above, according to the invention described in each claim, the catalyst container expands and expands in the vertical direction due to the heat during operation, and the clearance is generated between the upper end surface of the catalyst carrier and the catalyst container. Even if the manifold converter is vibrated in the vertical direction due to vibrations during running in this state, the catalyst carrier does not vibrate in the vertical direction, so stepped wear of the catalyst carrier can be prevented.

According to the third aspect of the invention, there is an advantage that the number of parts can be reduced as compared with the second aspect of the invention.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a manifold converter according to an embodiment of the present invention.

FIG. 2 is a sectional view of an essential part of a manifold converter according to a second embodiment of the present invention.

FIG. 3 is a sectional view of an essential part of a manifold converter according to a third embodiment of the present invention.

FIG. 4 is a front view of a conventional manifold converter.

5 is a side view of the manifold converter shown in FIG.

FIG. 6 is a sectional view of a conventional manifold converter.

[Explanation of symbols]

 21, 21 ', 21 "Holding frame 23, 23', 23", 63, 65, 67 Buffer member 31, 51, 53 Manifold converter 33, 33 'Catalyst carrier 33c, 33c', 33d, 33d 'Shoulder portion 33e, 33e ′, 33f, 33f ″ Opposing surfaces 35, 55 Catalyst container 45, 45 ′ Annular groove 69 Recess

Claims (3)

[Scope of utility model registration request] 1. A pair of half-split containers (35a, 35b, 5) mounted on an exhaust gas outlet of an exhaust manifold substantially vertically.
5a, 55b) cylindrical catalyst container (35, 55)
In a manifold converter having a catalyst carrier (33, 33 ') housed therein, an annular groove (45, 45') is formed on the outer periphery of the catalyst carrier (33, 33 ') along the circumferential direction thereof. Both shoulders (33c, 33) of the catalyst carrier (33, 33 ') facing each other across the annular groove (45, 45').
d, 33c ', 33d'), the catalyst carrier (33, 3
3 ') A buffer member (2 for restricting movement in the axial direction
3 ', 23 ", 65, 67) are arranged. 2. The buffer member (23 ′, 23 ″) is a holding frame (21 ′, 2) fixed to the inner circumference of the catalyst container (35).
1 ″) to the facing surfaces (33e, 33f, 33e ′, 33f ′) of the shoulders (33c, 33c ′) of the catalyst carrier (33) that face each other across the annular groove (45), respectively. The manifold converter according to claim 1, wherein the manifold converter is in contact with the manifold converter. 3. A catalyst support (3) is provided in the catalyst container (55).
A concave portion (69) protruding into an annular groove (45 ') provided on the outer periphery of 3') is formed along the circumferential direction, and the cushioning members (65, 67) sandwich the annular groove (45 '). Both shoulders (33c ', 33) of the catalyst carrier (33') facing each other at
The manifold converter according to claim 1, wherein the manifold converter is externally fitted to d ') and abuts on the upper and lower inner peripheral surfaces of the recess (69).