EP0455622A1 - Silencieux d'aspiration, plus particulièrement pour moteurs à combustion interne à deux temps - Google Patents

Silencieux d'aspiration, plus particulièrement pour moteurs à combustion interne à deux temps Download PDF

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Publication number
EP0455622A1
EP0455622A1 EP91890079A EP91890079A EP0455622A1 EP 0455622 A1 EP0455622 A1 EP 0455622A1 EP 91890079 A EP91890079 A EP 91890079A EP 91890079 A EP91890079 A EP 91890079A EP 0455622 A1 EP0455622 A1 EP 0455622A1
Authority
EP
European Patent Office
Prior art keywords
chamber
inlet pipe
intake silencer
connecting pipes
partition
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.)
Granted
Application number
EP91890079A
Other languages
German (de)
English (en)
Other versions
EP0455622B1 (fr
Inventor
Christian Dipl. Ing. Beidl
Albin Sterbenz
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
Publication of EP0455622A1 publication Critical patent/EP0455622A1/fr
Application granted granted Critical
Publication of EP0455622B1 publication Critical patent/EP0455622B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/14—Combined air cleaners and silencers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1205—Flow throttling or guiding
    • F02M35/1211—Flow throttling or guiding by using inserts in the air intake flow path, e.g. baffles, throttles or orifices; Flow guides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1205—Flow throttling or guiding
    • F02M35/1227—Flow throttling or guiding by using multiple air intake flow paths, e.g. bypass, honeycomb or pipes opening into an expansion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two

Definitions

  • the invention relates to an intake silencer with an air filter, in particular for two-stroke internal combustion engines, consisting of a rigid housing which is divided by a partition into two chambers which are connected by at least two pipes passing through the partition, the first larger chamber having an inlet pipe and one Has filter insert and the second chamber is provided with an outlet nozzle.
  • Such an intake silencer is already known in practice. It has a simple cylindrical, non-subdivided inlet pipe and there is usually only a single connecting pipe. However, if two or more such connecting pipes are provided, they have the same diameter and the same length. The muffler is only flowed through in one direction.
  • the disadvantage here is that in relation to the pipe length resulting in favorable acoustic values and the pipe diameter, which is also acoustically favorable, there is a high pressure loss, which naturally reduces the engine output. Due to the single connecting pipe or several connecting pipes of the same length, there is a risk of pronounced natural frequencies, which lead to unpleasant noises and a higher sound level. Since the muffler is only flowed through in one direction, the damping is poorer due to the lack of appropriate reflections.
  • the invention is therefore based on the object of providing an intake silencer of the type described at the outset, which ensures good sound absorption even with high engine output.
  • the invention achieves the stated object in that the inlet pipe consists of a diffuser divided into two or more channels of different lengths and that the connecting pipes connecting the two chambers have different diameters and / or lengths in a manner known per se.
  • the inlet pipe is designed as a diffuser, there are lower pressure losses without having to enlarge the diameter and thereby achieve poorer acoustic values.
  • the channels of different lengths in the diffuser make a significant contribution to improving the damping caused by interference. Due to the different dimensions of the connecting pipes, the formation of pronounced natural frequencies is suppressed, which also improves noise reduction.
  • the inlet pipe forming the diffuser is arranged opposite the connecting pipes or these opposite the outlet pipe in the sense of reversing the direction of flow in the first and / or second chamber.
  • an insulating insert which is separated from the housing wall by an air gap is provided in the second chamber. This insulating insert reduces the sound transmission to the housing and thus the sound radiation from the housing surface.
  • Different lengths of the pipes or channels are achieved in the simplest way in that the outlet end of the inlet pipe and at least one of the two ends of the connecting pipes each have an edge which is oblique to the pipe axis.
  • the intake silencer has a rigid housing 1, which is divided into two chambers 1a, 1b by a partition 2.
  • the partition 2 is interrupted by three connecting pipes 3, 4, 5, which lead from the chamber 1a into the chamber 1b.
  • the chamber 1a has an inlet pipe 6 which forms a diffuser which is divided into four channels 8 of different lengths by a cross-shaped insert 7. The different length of these channels 8 will achieved in that the outlet end of the inlet tube 6 has an edge 9 inclined to the tube axis.
  • An air filter 10 is inserted in the chamber 1a.
  • the three connecting pipes 3, 4, 5 have different diameters and, due to their likewise inclined edge 9a, also have different lengths.
  • An outlet connection 11 leads from the chamber 1b to the internal combustion engine.
  • the arrangement of the inlet pipe 6 with respect to the connecting pipes 3, 4, 5 or the latter with respect to the outlet connection 11 is provided such that the direction of flow of the sucked-in air reverses both in the first larger chamber 1a and in the second chamber 1b.
  • an insulation insert 12 is provided which is separated from the housing wall by an air gap in order to reduce the sound transmission to the housing 1 and thus to radiate sound from the housing surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Characterised By The Charging Evacuation (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
EP91890079A 1990-04-30 1991-04-17 Silencieux d'aspiration, plus particulièrement pour moteurs à combustion interne à deux temps Expired - Lifetime EP0455622B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT984/90 1990-04-30
AT0098490A AT396510B (de) 1990-04-30 1990-04-30 Ansauggeräuschdämpfer mit luftfilter, insbesondere für zweitakt-brennkraftmaschinen

Publications (2)

Publication Number Publication Date
EP0455622A1 true EP0455622A1 (fr) 1991-11-06
EP0455622B1 EP0455622B1 (fr) 1993-06-23

Family

ID=3504278

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91890079A Expired - Lifetime EP0455622B1 (fr) 1990-04-30 1991-04-17 Silencieux d'aspiration, plus particulièrement pour moteurs à combustion interne à deux temps

Country Status (6)

Country Link
US (1) US5164550A (fr)
EP (1) EP0455622B1 (fr)
JP (1) JPH04228868A (fr)
AT (1) AT396510B (fr)
DE (1) DE59100163D1 (fr)
ES (1) ES2041556T3 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5388408A (en) * 1993-10-01 1995-02-14 Lawrence-Keech Inc. Exhaust system for internal combustion engines
JP2895407B2 (ja) * 1994-12-01 1999-05-24 本田技研工業株式会社 吸気消音装置
USD540928S1 (en) 2005-08-11 2007-04-17 Briggs & Stratton Corporation Air cleaner cover
USD540929S1 (en) 2005-08-24 2007-04-17 Briggs & Stratton Corporation Air cleaner cover
US7441532B2 (en) 2006-02-15 2008-10-28 Briggs & Stratton Corporation Four-stroke internal combustion engine having reduced noise emissions
DE102006060271A1 (de) * 2006-12-20 2008-06-26 Volkswagen Ag Luftfiltergehäuse für eine Brennkraftmaschine mit Schalldämpfung
US7934582B2 (en) * 2007-09-07 2011-05-03 Go Green APU LLC Engine silencing and vibration reduction system and method
US8087492B2 (en) * 2010-03-08 2012-01-03 Huntair, Inc. Methods and systems for integrating sound attenuation into a filter bank
US8066096B1 (en) * 2010-11-04 2011-11-29 Hamilton Sundstrand Corporation Inlet silencer
DE102020122027B4 (de) * 2020-08-24 2023-05-04 Mann+Hummel Gmbh Schalldämpfer und Filtersystem

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT235089B (de) * 1962-05-16 1964-08-10 Knecht Filterwerke Gmbh Insbesondere für eine Brennkraftmaschine vorgesehener Dämpferfilter
FR2605271A1 (fr) * 1986-10-17 1988-04-22 Gilardini Spa Groupe d'aspiration de l'air pour vehicules industriels
US4790864A (en) * 1987-12-16 1988-12-13 Ford Motor Company Compact engine air/cleaner with integrated components

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4782912A (en) * 1987-03-18 1988-11-08 Ford Motor Company Engine air cleaner - noise reducer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT235089B (de) * 1962-05-16 1964-08-10 Knecht Filterwerke Gmbh Insbesondere für eine Brennkraftmaschine vorgesehener Dämpferfilter
FR2605271A1 (fr) * 1986-10-17 1988-04-22 Gilardini Spa Groupe d'aspiration de l'air pour vehicules industriels
US4790864A (en) * 1987-12-16 1988-12-13 Ford Motor Company Compact engine air/cleaner with integrated components

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 13, no. 244 (M-834) 07 Juni 1989,;& JP-A-1 053 055 (HONDA MOTOR CO LTD) 01 März 1989, *

Also Published As

Publication number Publication date
EP0455622B1 (fr) 1993-06-23
ATA98490A (de) 1993-01-15
DE59100163D1 (de) 1993-07-29
ES2041556T3 (es) 1993-11-16
JPH04228868A (ja) 1992-08-18
US5164550A (en) 1992-11-17
AT396510B (de) 1993-10-25

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