JP3185553U - Catalyst unit - Google Patents

Abstract

The present invention provides a catalyst unit that can reduce the inspection load by replacing only a genuine catalyst device in which a silencer and a catalyst device are integrated.
SOLUTION: A catalyst unit 1 can be replaced with a catalyst device 22 by cutting the middle of a pipeline with respect to a genuine part 20 of an exhaust device in which a silencer 24 and a catalyst device 22 are integrated via a pipeline 26. Can be assembled to. The catalyst unit includes a catalyst main body 2 that purifies exhaust gas with a catalyst, and a connecting pipe 4 that extends from the catalyst main body and is connected to a pipe line of a genuine part. The connecting pipe has a connecting end that is fitted and connected to the pipe line, and the connecting end has at least one groove along the axial direction that allows the inner diameter of the connecting pipe to be expanded. It is made to fit and it is fastened with a fastener.
[Selection] Figure 1

Description

  The present invention relates to a catalyst unit that can be incorporated into an exhaust device to purify exhaust gas, and more particularly, to a catalyst unit that can be assembled to a genuine part in which a silencer and a catalyst device are integrated in an interchangeable manner with the catalyst device. .

  Generally, in a vehicle, a ship, an aircraft, and the like, an exhaust device is provided to exhaust exhaust gas from the engine side into the atmosphere. Such an exhaust device is required to efficiently exhaust the exhaust gas discharged from the engine side to the atmosphere side, and particularly in an automobile, for example, an exhaust manifold that collects exhaust gas from the engine side and A catalyst device for purifying exhaust gas using a catalyst, a silencer (muffler) for reducing exhaust noise and preventing noise, and an exhaust pipe leading to the atmosphere are provided. Therefore, in such an exhaust device, exhaust gas from the engine side is collected by the exhaust manifold, passes through the catalyst device and the silencer, and then is exhausted to the atmosphere through the exhaust pipe.

  In addition, the catalyst device and silencer incorporated in the middle of such an exhaust system are important parts that are indispensable for satisfying the safety standards related to exhaust, and the genuine parts are generally the exhaust system on the upstream side and the exhaust system. The silencer on the downstream side is integrated via a pipeline (for example, see Patent Document 1).

Utility Model Registration No. 3162112

  By the way, there is a case where it is desired to replace the catalyst device for the purpose of improving the fuel consumption and performance of the vehicle and improving the response (response of torque output with respect to the accelerator depression amount). In such a case, as described above, if the catalyst device and the silencer are integrated, generally, they are replaced together.

  However, when such an integral replacement is performed, in order to inspect whether the safety standard is satisfied at the time of the vehicle inspection, each inspection of the catalyst device and the silencer is individually performed at the designated engine, that is, the exhaust gas. It is necessary and troublesome to obtain both the test and the noise test.

  The present invention has been made paying attention to the above problems, and provides a catalyst unit that can reduce the burden of inspection by replacing only the genuine catalyst device in which the silencer and the catalyst device are integrated. The purpose is to do.

  In order to achieve the above-described object, the present invention is a catalyst unit that can be assembled to a genuine part of an exhaust device in which a silencer and a catalyst device are integrated via a pipe line in an exchangeable manner with the catalyst device. And a catalyst main body for purifying exhaust gas flowing through the pipe line with a catalyst, and a connecting pipe extending from the catalyst main body and connected to the pipe line.

  According to the above-described configuration, for example, by cutting the pipe line of the genuine part, disconnecting the catalyst device from the silencer, and connecting the connection pipe of the catalyst unit to the cut end of the pipe line connected to the silencer, Instead of the catalyst device, the catalyst unit can be assembled with genuine parts. In this way, if the silencer and catalyst device are not replaced together, but only the catalyst device can be replaced while leaving the genuine silencer, the exhaust gas will not be subjected to a noise test during vehicle inspection. All you have to do is take the test, reducing the burden of inspection.

  According to the catalyst unit of the present invention, it is possible to replace only the genuine catalyst device in which the silencer and the catalyst device are integrated, thereby reducing the inspection burden.

(A) is the whole perspective view of the catalyst unit which concerns on one Embodiment of this invention, (b) is the whole perspective view of the genuine component which has a silencer and a catalyst apparatus. The perspective view which shows the state which cut | disconnected the middle of the pipe line of the genuine part of FIG. 1, (b), and cut | disconnected the catalyst apparatus from the silencer. (A) is a perspective view showing a state in which the catalyst unit shown in FIG. 1 (a) is connected to a cut end portion of a pipeline cut as shown in FIG. 2 by a fastener, and (b) is a main part of the connecting portion. FIG. 1A is a perspective view showing a state after the catalyst unit of FIG. 1A is connected to a cut end portion of a pipeline cut as shown in FIG. 2 with a fastener, and FIG. The perspective view of the catalyst apparatus of components.

Hereinafter, a catalyst unit according to the present invention will be described with reference to the drawings.
1 to 4 show an embodiment of a catalyst unit according to the present invention, FIG. 1 (a) is an overall perspective view of the catalyst unit according to an embodiment of the present invention, and FIG. 1 (b) is a silencer. FIG. 2 is a perspective view showing a state in which the genuine part having the catalyst device is cut off in the middle of the genuine part pipe line of FIG. 1 (b) and the catalyst device is separated from the silencer, FIG. ) Is a perspective view showing a state in which the catalyst unit shown in FIG. 1A is connected to the cut end portion of the pipeline cut as shown in FIG. 2 by a fastener, and FIG. 3B is an enlarged perspective view of a main part of the connection portion. 4 (a) is a perspective view showing a state after the catalyst unit of FIG. 1 (a) is connected to the cut end of the pipe line cut as shown in FIG. 2 by a fastener, and FIG. 4 (b). ) Is a perspective view of a genuine part catalyst device separated from a silencer.

  As shown in FIG. 1B, the genuine part 20 is a catalyst with a silencer that is a safety standard compliant product in which a silencer (silencer) 24 and a catalyst device 22 are integrated via a conduit 26. It is comprised and is integrated in exhaust apparatuses, such as a motor vehicle which receives exhaust gas from the engine side. In this case, for example, the catalyst device 22 is connected to an exhaust manifold (not shown) side that collects exhaust gas from the engine, while the silencer 24 is connected to an exhaust pipe (not shown) side that leads to the atmosphere. The

  As shown in FIG. 1A, the catalyst unit 1 according to the present embodiment is assembled so as to be replaceable with the catalyst device 22 with respect to the genuine part 20, and the pipe line 26 of the genuine part 20 is provided. It has a catalyst body 2 for purifying exhaust gas flowing with a catalyst, and a connecting pipe 4 extending from the catalyst body 2 and connected to a pipe line 26 of the genuine part 20.

The catalyst body 2, for example, is intended to purify the exhaust gas by causing HC in the exhaust gas, the reduction of the oxidized or NO _x in the CO and the like carried out using a catalyst, in the present embodiment, for example, the metal catalyst used It is done.

  Further, the connection pipe 4 of the present embodiment has a connection end 4 a that is fitted and connected to the outer peripheral surface of the pipe line 26 of the genuine part 20. The inner diameter of the connection end 4 a is set to be equal to or larger than the outer diameter of the pipe line 26 of the genuine part 20. In this case, the inner diameter of the connection end 4a is expanded as shown in FIG. 3B so that the connection end 4a can be easily fitted to the outer periphery of the pipe line 26 of the genuine part 20. At least one groove 8 is provided along the axial direction to enable it. Specifically, in the present embodiment, two grooves 8 and 8 are provided, and these grooves 8 and 8 have a predetermined length along the axial direction from the opening edge of the connection end 4a (connection pipe 4). And provided at an angular interval of 180 ° along the circumferential direction of the connecting pipe 4.

  Further, in the present embodiment, the connecting pipe 4 (connecting end 4 a) is fastened to the pipe 26 in order to securely connect the connecting pipe 4 of the catalyst unit 1 and the pipe 26 of the genuine part 20. 10 (see FIG. 3). Specifically, as shown in FIG. 3, the fastener 10 has an outer peripheral surface of a connecting portion between the connecting end 4 a of the connecting pipe 4 and the pipe 26 (the connecting end 4 a is fitted on the outer periphery of the pipe 26. In this embodiment to be attached, the cross section fitted to the outer peripheral surface of the connection end portion 4a includes a substantially C-shaped elastic ring 12 and a bolt 14 that connects between both ends 12a and 12b of the ring 12, and the bolt 14 By loosely tightening, the inner diameter of the ring 12 can be expanded or reduced.

  Next, an example in which the catalyst unit 1 having the above-described configuration is assembled to the genuine part 20 so as to be replaceable with the catalyst device 22 will be described.

  In order to replace only the catalyst device 22 of the genuine part 20 with the catalyst unit 1, first, the middle of the conduit 26 of the genuine part 20 in the integrated state shown in FIG. 1B is cut by a cutter or the like. This state is shown in FIG. In the genuine part 20 in this state, the catalyst device 22 is disconnected from the silencer 24, and the silencer 24 is connected to a part 26 </ b> A of the pipeline 26, and the catalyst device 22 is connected to the remaining part 26 </ b> B of the pipeline 26. It is in.

  From this state of FIG. 2, the connecting pipe 4 of the catalyst unit 1 is connected to the cut end of the pipe line portion 26 </ b> A connected to the silencer 24. Specifically, as shown in FIG. 3, the connection end 4 a of the connection pipe 4 is fitted to the outer periphery of a pipe line part 26 </ b> A that is connected to the silencer 24 of the genuine part 20. At this time, the inner diameter of the connection end 4a is elastically expanded by the action of the groove 8 provided in the connection end 4a, and the connection end 4a is elastically fitted to the outer periphery of the pipe line portion 26A.

  And in this fitting state, this time, by fitting the ring 12 of the fastener 10 to the outer peripheral surface of the connecting portion between the connecting end 4a of the connecting pipe 4 and the pipe line 26, and tightening the bolt 14 in that state The connection pipe 4 is firmly connected and fixed to the pipe line portion 26 </ b> A of the genuine part 20. This state is shown in FIG. FIG. 4B shows the genuine part catalyst device 22 separated from the silencer 24 of the genuine part 20.

  As described above, according to the catalyst unit 1 of the present embodiment, it is not necessary to replace the silencer 24 and the catalyst device 22 together, and only the catalyst device 22 can be partially replaced. At this time, it is not necessary to individually check the catalyst device and the silencer. That is, only the exhaust gas test of the catalyst unit 1 is required without being subjected to the noise test of the silencer 24 (genuine part 20) (becomes a product conforming to safety standards), and the burden of inspection is reduced.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. For example, in the embodiment described above, the two grooves 8 are provided at the connection end 4a of the connection pipe 4 of the catalyst unit 1 with an angular interval of 180 °, but the number and arrangement of the grooves 8 are arbitrary. is there. In short, it is only necessary that the connecting pipe 4 of the catalyst unit 1 can be smoothly fitted into the pipe line 26 of the genuine part 20. Further, the structural form of the fastener 10 is not limited to that described above. As long as the fitting connection state between the connection pipe 4 of the catalyst unit 1 and the pipe line 26 of the genuine part 20 can be maintained, the structural form of the fastener is not limited, and even if the fastener is not used. good. In this case, for example, the connection pipe 4 of the catalyst unit 1 and the pipe line 26 of the genuine part 20 may be connected and fixed by welding or the like.

  The catalyst main body 2 of the catalyst unit 1 can adopt various known forms, and the structure is not limited as long as the exhaust gas can be purified by the catalyst. Further, the shape of the connecting pipe 4 of the catalyst unit 1 can be arbitrarily set. In the embodiment described above, the connection end 4 a of the connection pipe 4 of the catalyst unit 1 is fitted on the outer periphery of the pipe 26 of the genuine part 20, but the connection end 4 a is fitted on the inner surface of the pipe 26. It may be. Furthermore, the catalyst unit of the present invention can be assembled to a genuine part in which the silencer and the catalyst device are integrated in an exchangeable manner with the catalyst device, but any pipe line of the exhaust device can be used to purify the exhaust gas. It can also be incorporated into the site.

DESCRIPTION OF SYMBOLS 1 Catalyst unit 2 Catalyst main body 4 Connection pipe 4a Connection end 8 Groove 10 Fastening tool 20 Genuine part 22 Catalytic device 24 Silencer 26 Pipe line

Claims (3)

A genuine unit of an exhaust device in which a silencer and a catalyst device are integrated via a pipe line, a catalyst unit that is assembled in a replaceable manner with the catalyst device,
A catalyst unit comprising: a catalyst main body for purifying exhaust gas flowing through the pipe line with a catalyst; and a connecting pipe extending from the catalyst main body and connected to the pipe line.   2. The catalyst unit according to claim 1, wherein the connection pipe has a connection end portion that is fitted and connected to the pipe line.   3. The connection end portion according to claim 2, wherein the connection end portion has at least one groove along an axial direction that allows an inner diameter of the connection end portion to be expanded, and the connection end portion is fitted to the pipe line and fastened by a fastener. The catalyst unit described.

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