# US 2014/0197631 A1 · Method for Manufacturing an Exhaust System and Exhaust System

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- Number: US 2014/0197631 A1
- Document ID: US20140197631A1
- Status: Published application
- Kind: A1
- Application number: 14/130,745
- Filed: 2012-06-22
- Published: 2014-07-17
- Earliest claimed: 2011-07-06
- Assignees: Faurecia Emissions Control Technologies, Germany GmbH
- Applicants: FAURECIA EMISSIONS CONTROL TECHNOLOGIES, GERMANY GmbH
- Inventors: Alfred Blueml
- Web page: https://patentgrep.com/patent/US20140197631A1

## CPC

- F16L 13/08: Soldered joints
- F01N 13/18: Construction facilitating manufacture, assembly, or disassembly
- F01N 13/1838: {characterised by the type of connection between parts of exhaust or silencing apparatus, e.g. between housing and tubes, between tubes and baffles}
- F16L 21/08: with additional locking means (F16L21/06 takes precedence; couplings of the quick-acting type F16L37/00)
- F01N 2450/22: by welding or brazing
- Y10T 29/49398: Muffler, manifold or exhaust pipe making
- Y10T 29/49968: Metal fusion joining
- F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

An exhaust system is manufactured in the following manner. Initially, a plurality of pipe sections are put into each other with a clearance fit, so that connecting points are formed, at which two pipe sections overlap each other. The pipe sections then are calibrated at the connecting points, so that a narrow gap is obtained. Subsequently, the connecting points are soldered. The exhaust system thus includes a plurality of pipe sections which are put into each other and soldered to each other. Outer pipe sections of the plurality of pipe sections are calibrated.

## Claims

### Claim 1

A method for manufacturing an exhaust system comprising the following steps:
putting a plurality of pipe sections into each other with a clearance fit, so that connecting points are formed, at which two pipe sections overlap each other;
calibrating the pipe sections at the connecting points, so that a narrow gap is obtained; and
soldering the connecting points.

### Claim 2 (depends on 1)

The method according to claim 1, wherein in the calibrating step, a pressure is applied onto an outer pipe of the two pipe sections in radial direction to the inside, so that at least the outer pipe is deformed plastically.

### Claim 3 (depends on 1)

The method according to claim 1, wherein the entire exhaust system is put together and all connecting points of the exhaust system are calibrated substantially at the same time.

### Claim 4 (depends on 1)

The method according to claim 1, wherein all connecting points of the exhaust system are soldered substantially at the same time.

### Claim 5 (depends on 1)

The method according to claim 1, wherein the exhaust system is soldered in a horizontal orientation.

### Claim 6 (depends on 1)

The method according to claim 1, wherein before putting the pipe sections together a solder materials been applied at one end of a pipe section.

### Claim 7

An exhaust system comprising:
a plurality of pipe sections which are put into each other and soldered to each other, wherein outer pipe sections of the plurality of pipe sections are calibrated.

### Claim 8 (depends on 7)

The exhaust system according to claim 7, wherein the plurality of pipe sections comprises more than five different pipe sections.

### Claim 9 (depends on 8)

The exhaust system according to claim 8, wherein the plurality of pipe sections comprises more than ten different pipe sections.

### Claim 10 (depends on 7)

The exhaust system according to claim 7, wherein at least one of the pipe sections is a coupling sleeve.

### Claim 11 (depends on 10)

The exhaust system according to claim 10, wherein straight pipe sections with interposed curved coupling sleeves are used.