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SE9903168L - Device and method of silencer unit - Google Patents

Device and method of silencer unit

Info

Publication number
SE9903168L
SE9903168L SE9903168A SE9903168A SE9903168L SE 9903168 L SE9903168 L SE 9903168L SE 9903168 A SE9903168 A SE 9903168A SE 9903168 A SE9903168 A SE 9903168A SE 9903168 L SE9903168 L SE 9903168L
Authority
SE
Sweden
Prior art keywords
opening degree
throttle
flow path
arrangement
detecting
Prior art date
Application number
SE9903168A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE521329C2 (en
SE9903168D0 (en
Inventor
Ahmed El-Bahrawy
Original Assignee
Volvo Personvagnar Ab
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 Volvo Personvagnar Ab filed Critical Volvo Personvagnar Ab
Priority to SE9903168A priority Critical patent/SE521329C2/en
Publication of SE9903168D0 publication Critical patent/SE9903168D0/en
Priority to PCT/SE2000/001695 priority patent/WO2001018365A1/en
Publication of SE9903168L publication Critical patent/SE9903168L/en
Publication of SE521329C2 publication Critical patent/SE521329C2/en

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
    • F01N1/10—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling in combination with sound-absorbing materials
    • 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
    • F01N1/083—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using transversal baffles defining a tortuous path for the exhaust gases or successively throttling exhaust gas flow
    • 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
    • F01N1/089—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using two or more expansion chambers in series
    • 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
    • F01N1/165—Silencing apparatus characterised by method of silencing by using movable parts for adjusting flow area
    • 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
    • F01N1/166—Silencing apparatus characterised by method of silencing by using movable parts for changing the flow path through the silencer or for adjusting the dimensions of a chamber or a pipe
    • 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
    • F01N1/24—Silencing apparatus characterised by method of silencing by using sound-absorbing materials
    • 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
    • F01N2310/00—Selection of sound absorbing or insulating material
    • F01N2310/02—Mineral wool, e.g. glass wool, rock wool, asbestos or the like

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Pipe Accessories (AREA)

Abstract

An arrangement for providing a noise silencing unit (3) for reducing noise from a gas through flow, which comprises at least a first flow path for said gas flow and a detection arrangement in connection with said first flow path for detecting the pressure of the gas flow. Further the arrangement comprises a switching arrangement with an adjustable throttle for blocking the first flow path to a first opening degree at detecting a pressure which is below a predetermined first limit value (p0), whereby the throttle is arranged for opening to a second opening degree if the first limit value (p0) is exceeded, and the throttle is arranged for opening to a third opening degree at detecting a pressure exceeding a predetermined second limit value (p1). The first opening degree corresponds to less than about 15% of the complete sectional area of the first flow path at the throttle, and that the second opening degree corresponds to more than about 30% and less than about 60% of the complete sectional area, and the third opening degree corresponds to more than about 90% of the complete sectional area.
SE9903168A 1999-09-06 1999-09-06 Device and method of silencer unit SE521329C2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE9903168A SE521329C2 (en) 1999-09-06 1999-09-06 Device and method of silencer unit
PCT/SE2000/001695 WO2001018365A1 (en) 1999-09-06 2000-09-04 Arrangement at a silencer and method for reduction of noise from a gas flow

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9903168A SE521329C2 (en) 1999-09-06 1999-09-06 Device and method of silencer unit

Publications (3)

Publication Number Publication Date
SE9903168D0 SE9903168D0 (en) 1999-09-06
SE9903168L true SE9903168L (en) 2001-03-07
SE521329C2 SE521329C2 (en) 2003-10-21

Family

ID=20416893

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9903168A SE521329C2 (en) 1999-09-06 1999-09-06 Device and method of silencer unit

Country Status (2)

Country Link
SE (1) SE521329C2 (en)
WO (1) WO2001018365A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2072372A (en) * 1934-02-23 1937-03-02 Riethmiller Ruth Exhaust system for automotive engines
NZ240672A (en) * 1991-12-04 1995-10-26 Graeme Charles Stephens Muffler with valve controlled through passage
DE69531286T2 (en) * 1995-02-24 2004-01-29 Calsonic Kansei Corp Muffler control device for use in a controllable exhaust system of an internal combustion engine
DE19540716C1 (en) * 1995-11-02 1997-04-17 Gillet Heinrich Gmbh Silencer with variable damping characteristics
SE517825C2 (en) * 1997-11-14 2002-07-23 Volvo Car Corp Device and method of silencing unit and use of the device in a motor vehicle

Also Published As

Publication number Publication date
WO2001018365A1 (en) 2001-03-15
SE521329C2 (en) 2003-10-21
SE9903168D0 (en) 1999-09-06

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Legal Events

Date Code Title Description
NUG Patent has lapsed