US2510441A - Air intake filter and silencer - Google Patents
Air intake filter and silencer Download PDFInfo
- Publication number
- US2510441A US2510441A US66347A US6634748A US2510441A US 2510441 A US2510441 A US 2510441A US 66347 A US66347 A US 66347A US 6634748 A US6634748 A US 6634748A US 2510441 A US2510441 A US 2510441A
- Authority
- US
- United States
- Prior art keywords
- silencer
- filter
- tube
- casing
- air
- 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.)
- Expired - Lifetime
Links
- 230000003584 silencer Effects 0.000 title description 11
- 230000008030 elimination Effects 0.000 description 5
- 238000003379 elimination reaction Methods 0.000 description 5
- 238000005192 partition Methods 0.000 description 2
- 241000239290 Araneae Species 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Images
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
- 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
-
- 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
- F02M35/02—Air cleaners
- F02M35/024—Air cleaners using filters, e.g. moistened
- F02M35/02475—Air cleaners using filters, e.g. moistened characterised by the shape of the filter element
- F02M35/02483—Cylindrical, conical, oval, spherical or the like filter elements; wounded filter elements
-
- 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
- F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S55/00—Gas separation
- Y10S55/21—Silencer cleaner
Definitions
- the illustrated form shows the air inlet in the side of a cylindrical casing so that the air enters radially between two tubes of difierent length, of which one is a low frequency resonator and the other leads into a domed end cap, forming a suction zone, and perhaps also a shorter resonator.
- the apertures in the resonator near its inlet end, leading directly into the zone (where the pressure is slightly lower) inside the filter and helping in distribution of air over the full length of the filter.
- An alternative method of air flow to each end of the filter is to permit an aperture approximately half way down the centre tube, and to cover the aperture with a, tube of larger diameter having its open end at the front and blanked off at the rear behind the aperture. In this way the maximum length of the acoustic tube is maintained when measured in either direction.
- the silencer is in other respects like that described and the present invention provides these improvements or modifications.
- Fig. 1 is a central longitudinal section
- Fig. 2 is an end view.
- the combined filter and silencer shown has a main body part comprising a central resonator tube I and concentric outer case 2.
- a cap 3 contains a concentric domed bafile or reflector 4 with its open end facing the inlet of the tube I.
- Thecap 3 and a partition 5 are secured to the case 2 by beading 6, leaving a high frequency elimination zone I between the tube I and the dome 4.
- Apertures 8 are provided near the inlet end of the resonator tube I to assist in the distribution of fiow to the filter element I5.
- a closure cap 9 is fitted to the outer case so that the air turns back into the annulus between the central tube and outer case.
- the closure cap 9 may be secured by a wing-nut I0 engaging a threaded rod II carried by a cross bar or spider I2 at the end of the tube I.
- Felt or like discs I3, I4 are fitted inside the partition at the far end of the annulus and in the closing cap respectively and make joint with the ends of the tapered star-shaped or deeply pleated filter unit.
- a retaining clip IS with tightening screw 20 can also be fitted to the outer case.
- the air which has passed into the tapered annular space I! inside the element will emerge through the filtering material into a reversely tapered annular space I8 outside it and communicating with a lateral branch I9 which forms the outlet for the filtered air from the combined filter and silencer to the engine intake.
- Either tube or casing may advantageously be tapered in some cases.
- filter unit may be used within the wider aspects of the invention, for instance a brush type.
- the emerging sound waves pass through the sound absorbing material of the filter before passing through the low frequency chamber or resonator and then through the zone where exposure to a chamber in which a partial vacuum is induced has the well-known tendency to level out the high frequency waves.
- a filter and silencer assembly comprising an elongated casing closed at one end and having a substantially central opening of reduced dimensions at the other end, an inlet end portion extending axially from the latter end of said casing and having an end located inlet substantially aligned with said opening, a tubular member longitudinally in said casing and connected thereto at one end in communication with said opening and having an outlet at the other end that opens into said casing, said member defining a low frequency silencing chamber and cooperating with said casing to define an annular filter chamber, a substantially cylindrical filter element extending longitudinally in said casing between the ends thereof and surrounding said tubular member to divide said filter chamber into concentricsections, an outlet in theside of said casing and opening laterally from the outer of the filter sections, and a domed reflector con-- centrically in said inlet end portion and-spaced therefrom to define an annular inlet passage therebetween, said reflector b'eing spaced from the adjacent casing end to define a high fre quency elimination zone andhavingx
- tubular member comprises: a 'ertures"open: ing laterally' into said filter-chamber adjacent" its' connection' withsaid'casing;
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)
Description
June 6, 1950 c. G. VOKES AIR INTAKE FILTER AND SILENCER 2 Sheets$heet 1 Filed Dec. 20, 1948 Attorney June 6, 1950 c, vo s 2,510,441
AIR INTAKE FILTER AND SILENCER Filed Dec. 20, 1948 2 Sheets-Sheet 2 F/GZ.
Invenlor Attorney Patented June 6, 1950 AIR INTAKE FILTER AND SILENCER Cecil G. Vokes, Guildford, England, assignor to Vokes Limited, Guildford, England Application December 20, 1948, Serial No. 66,347 In Great Britain December 29, 1947 3 Claims. 1
In application Ser. No. 705,554 there is described an intake silencer in which the entering air passes first through a zone of high frequency elimination, next through a low frequency silencer (preferably including a resonator designed for the dominant sound) and finally through a fibrous or other sound absorbing filter. The result is that the sound waves emerging from the engine or other intake first pass through the filter, then the low frequency silencer and finally the high frequency elimination zone where there is an induced suction effect.
The illustrated form shows the air inlet in the side of a cylindrical casing so that the air enters radially between two tubes of difierent length, of which one is a low frequency resonator and the other leads into a domed end cap, forming a suction zone, and perhaps also a shorter resonator.
It has been found in practice that better results are obtainable in some cases by locating a domed or conical baflle or reflector with its open end opposite to the inlet end of the low frequency tube, but of greater area than the tube, so that it helps to absorb low frequency noises issuing from the tube. The air is admitted to the apparatus at the end outside the reflector, so that the entering air flows past the outside of the reflector in an annular space preferably of substantially con stant cross-sectional area and then turns inwards into the high frequency zone and thence through the low frequency resonator.
It is also found preferable to provide the apertures in the resonator near its inlet end, leading directly into the zone (where the pressure is slightly lower) inside the filter and helping in distribution of air over the full length of the filter.
An alternative method of air flow to each end of the filter is to permit an aperture approximately half way down the centre tube, and to cover the aperture with a, tube of larger diameter having its open end at the front and blanked off at the rear behind the aperture. In this way the maximum length of the acoustic tube is maintained when measured in either direction.
The silencer is in other respects like that described and the present invention provides these improvements or modifications.
A typical form is shown upon the accompanying drawings whereof:
Fig. 1 is a central longitudinal section, and
Fig. 2 is an end view.
The combined filter and silencer shown has a main body part comprising a central resonator tube I and concentric outer case 2. A cap 3 contains a concentric domed bafile or reflector 4 with its open end facing the inlet of the tube I. Thecap 3 and a partition 5 are secured to the case 2 by beading 6, leaving a high frequency elimination zone I between the tube I and the dome 4. Apertures 8 are provided near the inlet end of the resonator tube I to assist in the distribution of fiow to the filter element I5.
A closure cap 9 is fitted to the outer case so that the air turns back into the annulus between the central tube and outer case. The closure cap 9 may be secured by a wing-nut I0 engaging a threaded rod II carried by a cross bar or spider I2 at the end of the tube I. Felt or like discs I3, I4 are fitted inside the partition at the far end of the annulus and in the closing cap respectively and make joint with the ends of the tapered star-shaped or deeply pleated filter unit. A retaining clip IS with tightening screw 20 can also be fitted to the outer case.
Air entering the apparatus at the inlet end of the cap 3 flows through the annular space 2|, of substantially constant cross-sectional area, surrounding the dome 4, before turning inward and entering the high frequency elimination zone I and resonator tube I. The air which has passed into the tapered annular space I! inside the element will emerge through the filtering material into a reversely tapered annular space I8 outside it and communicating with a lateral branch I9 which forms the outlet for the filtered air from the combined filter and silencer to the engine intake.
Either tube or casing may advantageously be tapered in some cases.
Other suitable forms of filter unit may be used within the wider aspects of the invention, for instance a brush type.
It will be noted that the emerging sound waves pass through the sound absorbing material of the filter before passing through the low frequency chamber or resonator and then through the zone where exposure to a chamber in which a partial vacuum is induced has the well-known tendency to level out the high frequency waves.
I claim:
1. A filter and silencer assembly comprising an elongated casing closed at one end and having a substantially central opening of reduced dimensions at the other end, an inlet end portion extending axially from the latter end of said casing and having an end located inlet substantially aligned with said opening, a tubular member longitudinally in said casing and connected thereto at one end in communication with said opening and having an outlet at the other end that opens into said casing, said member defining a low frequency silencing chamber and cooperating with said casing to define an annular filter chamber, a substantially cylindrical filter element extending longitudinally in said casing between the ends thereof and surrounding said tubular member to divide said filter chamber into concentricsections, an outlet in theside of said casing and opening laterally from the outer of the filter sections, and a domed reflector con-- centrically in said inlet end portion and-spaced therefrom to define an annular inlet passage therebetween, said reflector b'eing spaced from the adjacent casing end to define a high fre quency elimination zone andhavingxan opening on its inner side opposite said casing openingiand of greater area than said casing opening to promote a reduced pressurewithin said refie'ctoFfor modifying the high frequency waves.
Z J- A n assembly 'a's'defined in -c1ain'1 1 wherein said tubular member comprises: a 'ertures"open: ing laterally' into said filter-chamber adjacent" its' connection' withsaid'casing;
3. An assembly as defined in claim 1 wherein said inlet end portion is slightly domed and spaced from said domed reflector to cooperatively provide said annular inlet passage with a substantially constant cross-sectional area to enable an even inlet flow.
CECIL G. VOKES.
REFERENCES CITED The following references are of record in the file of this patent:
STATES PATENTS
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7877/46A GB602855A (en) | 1947-12-29 | 1946-03-13 | Air intake filters and silencers |
GB34472/47A GB629876A (en) | 1947-12-29 | 1947-12-29 | Improved air intake filters and silencers |
Publications (1)
Publication Number | Publication Date |
---|---|
US2510441A true US2510441A (en) | 1950-06-06 |
Family
ID=32232358
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US705554A Expired - Lifetime US2510440A (en) | 1946-03-13 | 1946-10-25 | Filter and silencer unit |
US66347A Expired - Lifetime US2510441A (en) | 1946-03-13 | 1948-12-20 | Air intake filter and silencer |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US705554A Expired - Lifetime US2510440A (en) | 1946-03-13 | 1946-10-25 | Filter and silencer unit |
Country Status (2)
Country | Link |
---|---|
US (2) | US2510440A (en) |
FR (1) | FR936424A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE944405C (en) * | 1952-02-10 | 1956-06-14 | Mann & Hummel Filter | Oil bath air filter and noise suppressor |
US3966014A (en) * | 1973-11-22 | 1976-06-29 | Bombardier Limited | Air intake silencer |
US4782912A (en) * | 1987-03-18 | 1988-11-08 | Ford Motor Company | Engine air cleaner - noise reducer |
WO1991000958A1 (en) * | 1989-07-10 | 1991-01-24 | Siemens Aktiengesellschaft | In-line noise attenuation device for a gas conduit |
US20080073145A1 (en) * | 2006-09-21 | 2008-03-27 | Yamaha Corporation | Silencer |
US20090065294A1 (en) * | 2007-09-07 | 2009-03-12 | Black Rock Systems Llc. | Engine silencing and vibration reduction system and method |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2705546A (en) * | 1949-06-03 | 1955-04-05 | Vokes Ltd | Silencers and air intake filter silencers |
US2974745A (en) * | 1953-01-15 | 1961-03-14 | Hi Press Air Conditioning Of A | Sound-deadening air-intake devices |
US2720279A (en) * | 1953-04-02 | 1955-10-11 | Fram Corp | Pleated paper carburetor air filter |
US2814357A (en) * | 1955-02-08 | 1957-11-26 | Premier Company | Vacuum cleaner and air filter therefor |
DE968882C (en) * | 1955-03-22 | 1958-04-03 | Steyr Daimler Puch Ag | Intake noise damper, especially for motorcycles |
US2945559A (en) * | 1958-03-12 | 1960-07-19 | Gen Motors Corp | Filters for fluids |
US2934165A (en) * | 1958-06-17 | 1960-04-26 | Purolator Products Inc | Filter |
US2990032A (en) * | 1958-08-19 | 1961-06-27 | Thor Power Tool Co | Separator for use with rock drills |
US2988166A (en) * | 1958-10-30 | 1961-06-13 | Massey Ferguson Inc | Air cleaner |
DE1154919B (en) * | 1959-03-05 | 1963-09-26 | Rheinstahl Eisenwerk Hilden Ag | Air blower for heating, cooling and ventilation systems |
US4854417A (en) * | 1987-08-03 | 1989-08-08 | Honda Giken Kogyo Kabushiki Kaisha | Exhaust muffler for an internal combustion engine |
US5632792A (en) * | 1995-08-16 | 1997-05-27 | Purolator Products Company | Air induction filter hose assembly |
US6875259B2 (en) * | 2002-02-26 | 2005-04-05 | Siemens Vdo Automotive, Inc. | Low cost combined air cleaner and resonator assembly |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1490957A (en) * | 1920-07-08 | 1924-04-22 | Richard Ernst | Method and device for muffling the noise of the exhaust gases of internal-combustion engines |
GB323881A (en) * | 1928-12-03 | 1930-01-16 | Fiat Spa | Means for silencing the noise produced by the pulsating flow of fluids |
GB367009A (en) * | 1930-11-10 | 1932-02-10 | Cecil Gordon Vokes | Improvements relating to air and like filters or silencers |
GB391180A (en) * | 1930-07-25 | 1933-04-18 | Gen Motors Res Corp | Improvements relating to apparatus for attenuating sound waves by resonance |
US2050581A (en) * | 1932-10-05 | 1936-08-11 | Orem Frederick Strattner | Air cleaning and sound-silencing apparatus |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US926070A (en) * | 1907-01-02 | 1909-06-22 | Frank J Matchette | Dust-collector. |
US1702804A (en) * | 1924-03-05 | 1929-02-19 | Charles A Winslow | Air cleaner |
US2020581A (en) * | 1934-07-09 | 1935-11-12 | Adlake Co | Bottom rail sealing strip |
US2170902A (en) * | 1936-10-28 | 1939-08-29 | Gen Motors Corp | Carburetor air cleaner and silencer assembly |
US2085702A (en) * | 1936-11-07 | 1937-06-29 | Hoover Co | Suction cleaner |
-
1946
- 1946-10-25 US US705554A patent/US2510440A/en not_active Expired - Lifetime
- 1946-12-03 FR FR936424D patent/FR936424A/en not_active Expired
-
1948
- 1948-12-20 US US66347A patent/US2510441A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1490957A (en) * | 1920-07-08 | 1924-04-22 | Richard Ernst | Method and device for muffling the noise of the exhaust gases of internal-combustion engines |
GB323881A (en) * | 1928-12-03 | 1930-01-16 | Fiat Spa | Means for silencing the noise produced by the pulsating flow of fluids |
GB391180A (en) * | 1930-07-25 | 1933-04-18 | Gen Motors Res Corp | Improvements relating to apparatus for attenuating sound waves by resonance |
GB367009A (en) * | 1930-11-10 | 1932-02-10 | Cecil Gordon Vokes | Improvements relating to air and like filters or silencers |
US2050581A (en) * | 1932-10-05 | 1936-08-11 | Orem Frederick Strattner | Air cleaning and sound-silencing apparatus |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE944405C (en) * | 1952-02-10 | 1956-06-14 | Mann & Hummel Filter | Oil bath air filter and noise suppressor |
US3966014A (en) * | 1973-11-22 | 1976-06-29 | Bombardier Limited | Air intake silencer |
US4782912A (en) * | 1987-03-18 | 1988-11-08 | Ford Motor Company | Engine air cleaner - noise reducer |
WO1991000958A1 (en) * | 1989-07-10 | 1991-01-24 | Siemens Aktiengesellschaft | In-line noise attenuation device for a gas conduit |
US20080073145A1 (en) * | 2006-09-21 | 2008-03-27 | Yamaha Corporation | Silencer |
US20090065294A1 (en) * | 2007-09-07 | 2009-03-12 | Black Rock Systems Llc. | Engine silencing and vibration reduction system and method |
US7934582B2 (en) * | 2007-09-07 | 2011-05-03 | Go Green APU LLC | Engine silencing and vibration reduction system and method |
Also Published As
Publication number | Publication date |
---|---|
FR936424A (en) | 1948-07-20 |
US2510440A (en) | 1950-06-06 |
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