FR2382581A1 - Exhaust silencer for IC engine - has turbine section followed by helical screw section - Google Patents

Exhaust silencer for IC engine - has turbine section followed by helical screw section

Info

Publication number
FR2382581A1
FR2382581A1 FR7707033A FR7707033A FR2382581A1 FR 2382581 A1 FR2382581 A1 FR 2382581A1 FR 7707033 A FR7707033 A FR 7707033A FR 7707033 A FR7707033 A FR 7707033A FR 2382581 A1 FR2382581 A1 FR 2382581A1
Authority
FR
France
Prior art keywords
section
engine
helical screw
exhaust silencer
followed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
FR7707033A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to FR7707033A priority Critical patent/FR2382581A1/en
Publication of FR2382581A1 publication Critical patent/FR2382581A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
    • F01N1/12—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using spirally or helically shaped channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
    • F01N1/18—Silencing apparatus characterised by method of silencing by using movable parts having rotary movement

Abstract

The silencer has a first section which has a cylindrical casing (1) with a volute at one side. The casing contains a cylindrical rotor (4) which carries radially projecting blades (2). The exhaust gases flowing over this rotate the impeller formed by the rotor and blades and are carried towards the atmosphere without noise. A second section connected to the first section consists of a cylindrical tube through the centre of which runs a core on which a helical fin is wound as an endless spiral. The fin may be perforated. The combination of the two sections in the path of the exhaust gases reduces noise and eliminates back pressure on the engine which would otherwise reduce the output.
FR7707033A 1977-03-04 1977-03-04 Exhaust silencer for IC engine - has turbine section followed by helical screw section Withdrawn FR2382581A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7707033A FR2382581A1 (en) 1977-03-04 1977-03-04 Exhaust silencer for IC engine - has turbine section followed by helical screw section

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7707033A FR2382581A1 (en) 1977-03-04 1977-03-04 Exhaust silencer for IC engine - has turbine section followed by helical screw section

Publications (1)

Publication Number Publication Date
FR2382581A1 true FR2382581A1 (en) 1978-09-29

Family

ID=9187848

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7707033A Withdrawn FR2382581A1 (en) 1977-03-04 1977-03-04 Exhaust silencer for IC engine - has turbine section followed by helical screw section

Country Status (1)

Country Link
FR (1) FR2382581A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2498680A1 (en) * 1981-01-29 1982-07-30 Flahault Claude Noise damping insert for exhaust pipe - comprises spiral wound rigid strip with blind punched holes to regularise flow
WO2008015046A1 (en) * 2006-08-01 2008-02-07 Contitech Kühner Gmbh & Cie.Kg Apparatus for sound absorbing in a tubular channel
GB2577320A (en) * 2018-09-24 2020-03-25 Kompetenzzentrum Das Virtuelle Fahrzeug Rotating air flow duct silencer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2498680A1 (en) * 1981-01-29 1982-07-30 Flahault Claude Noise damping insert for exhaust pipe - comprises spiral wound rigid strip with blind punched holes to regularise flow
WO2008015046A1 (en) * 2006-08-01 2008-02-07 Contitech Kühner Gmbh & Cie.Kg Apparatus for sound absorbing in a tubular channel
GB2577320A (en) * 2018-09-24 2020-03-25 Kompetenzzentrum Das Virtuelle Fahrzeug Rotating air flow duct silencer

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Legal Events

Date Code Title Description
ST Notification of lapse