Outer tube of exhaust system part

A technology of exhaust system and components, which is applied in the field of the outer cylinder of exhaust system components, can solve the problems of damaging the waterproof effect of the outer cylinder, and achieve the effect of preventing exhaust gas leakage and suppressing bulging deformation

Inactive Publication Date: 2009-05-27
SANGO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the discharge of water vapor and the prevention of water intrusion are contradictory. As described in the above-mentioned patent document 2, although the water vapor can be discharged by using the drain channel and the through hole, the condensed water is allowed to enter the drain channel because it communicates with the inside of the muffler. Inner, that is, damage the waterproof effect of the diameter direction of the outer cylinder, and cause the accumulation of condensed water

Method used

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  • Outer tube of exhaust system part
  • Outer tube of exhaust system part
  • Outer tube of exhaust system part

Examples

Experimental program
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Embodiment Construction

[0037] Preferred embodiments of the present invention will be described below with reference to the drawings. Figure 1 to Figure 3 It is a figure which shows the outer cylinder 1 of the exhaust system component which concerns on one Embodiment of this invention, image 3 yes figure 1The enlarged sectional view of A-A. Such as figure 1 and figure 2 As shown, the outer cylinder 1 is double-wound metal plates to form a cylindrical shape composed of an inner plate 2 and an outer plate 3, and the circumferential end 2a of the inner plate 2 is aligned with the circumferential edge of the outer plate 3. The end portions 3a of the overlapping portions 4 are intersected in the circumferential direction, and the overlapping portions 4 are connected together, and formed in two layers. The circumferential end portion 2a of the inner plate 2 and the circumferential end portion 3a of the outer plate 3 are formed in close contact with each other at the overlapping portion 4 and are smo...

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Abstract

A sheet metal is rolled double to form a cylinder having an inner plate 2 and an outer plate 3, and form an overlapped portion 4, with their circumferential end portions 2a and 3a crossed in the circumferential direction. Between the inner plate 2 and the outer plate 3, a plurality of line grooves 5 are formed to extend outward of an outer tube 1, with their tip end portions facing with each other to be apart from each other by a predetermined distance from a peripheral edge of one of the inner plate and outer plate, and these line grooves 5 are arranged in parallel with each other along a longitudinal direction of the outer plate 3. And, at least one portion of the overlapped portion positioned between the neighboring line grooves is joined by welding W.

Description

technical field [0001] The present invention relates to an outer cylinder of an exhaust system component, for example, to an outer cylinder of a muffler or an exhaust purification device. Background technique [0002] In the exhaust system of automobiles equipped with internal combustion engines, exhaust system components such as mufflers for reducing exhaust noise or exhaust purification devices for purifying exhaust gas are arranged. In order to suppress radiated sound, these exhaust system components generally use an outer cylinder formed in two or more layers. For example, in the following Patent Document 1, it is disclosed that a plate is wound around the end plate and the separator to form a cylindrical outer cylinder, and the plate is welded to the outer peripheral flanges of the end plate and the separator by laser welding from the outside of the outer cylinder. silencer. [0003] In addition, in the following Patent Document 2, there is proposed a muffler for an i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N1/00F01N7/18F01N7/00F01N13/18
CPCF01N2450/22F01N13/1872F01N2450/20F01N13/1877F01N13/185F01N2260/20F01N2260/18F01N3/005Y02T10/20F01N2530/26Y02T10/12
Inventor 木全笃
Owner SANGO CO LTD
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