US2760475A - Self-cleaning detonation attenuation means for internal combustion engines - Google Patents
Self-cleaning detonation attenuation means for internal combustion engines Download PDFInfo
- Publication number
- US2760475A US2760475A US578474A US57847456A US2760475A US 2760475 A US2760475 A US 2760475A US 578474 A US578474 A US 578474A US 57847456 A US57847456 A US 57847456A US 2760475 A US2760475 A US 2760475A
- Authority
- US
- United States
- Prior art keywords
- chamber
- internal combustion
- detonation
- self
- combustion engines
- 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
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F3/00—Pistons
- F02F3/28—Other pistons with specially-shaped head
-
- 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
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
-
- 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
- F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
- F02B2275/22—Side valves
-
- 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
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/04—Cleaning of, preventing corrosion or erosion in, or preventing unwanted deposits in, combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2201/00—Metals
- F05C2201/04—Heavy metals
- F05C2201/0433—Iron group; Ferrous alloys, e.g. steel
- F05C2201/0448—Steel
-
- 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
Definitions
- This invention relates generally to internal combustion engines and to means for suppressing irregular burning and detonation of fuel-air mixture therein.
- the invention is based on my discovery that detonation in combustion engines involves acoustic phenomena and can be alleviated by means of certain acoustic apparatus used in combination with the combustion chamber.
- the present invention is based on the fact that detonation in an engine combustion chamber produces sound waves, a large part of which rise to high amplitude at resonant frequencies of the chamber, and on my discovery that the sound waves produce the various wellknown and harmful manifestations of detonation.
- my basic invention I inhibit or attenuate these harmful effects by interfering with or attenuating the high amplitude detonation-induced sound waves, and this is done by use in connection with the combustion chamber of acoustic attenuation means made responsive to the frequencies at which the detonation induced sound waves build up to high amplitudes.
- a general object of the invention is the provision of simple and effective acoustic attenuator means for the combustion chamber of an internal combustion engine, with particular reference to substantial efiectiveness, simplicity, low cost, and with inclusion of a self-cleaning feature.
- the acoustic attenuation means of the present invention is capable of being used in either the combustion chamber head Wall or the head wall of the piston, though comprising configurations particularly well adapted for incorporation in the head wall of the piston, and the invention will be so illustrated and described hereinafter, but without limitation thereto.
- Fig. 1 is a vertical transverse section through an internal combustion engine equipped with the wave attenuator configurations of the invention.
- Fig. 2 is a vertical medial section through the piston of the engine of Fig. 1, showing a plurality of attenuators in vertical medial section.
- an illustrative L-head engine comprised of a water-cooled block 10, a watercooled head 11 fastened to block 10, a piston 14 working in cylinder 15 in block 10, exhaust valve 16, and spark plug 17. It will be understood that an intake valve (not shown) will be located along-side exhaust valve 16.
- the block 10 and head 11 are shown with more or less con-- ventional cooling jackets and head 11 has an inner combustion chamber wall 20 enclosing a combustion chamber space 21 over the cylinder and valves, as shown.
- the head or top wall 26 of the piston is formed with a plurality of bores 26a, in any suitable pattern, extending downwardly from its top surface, and an enlarged counterbore 26b extends upwardly from below.
- Helmholtz resonator structures generally designated at 27, include a cylindric base portion 27a mounted in counterbore 26b, and secured in position by peening as at 27b. Extending upwardly from base portion 27a is a reduced cylindric member 28 forming a resonator chamber 29. As shown, the side walls of the cylinder 28 are annularly spaced from the defining walls of bore 26a, and the lower ends of the side walls of cylinder 28 are formed with a series of gas ports 30, which ports constitute the neck of the resonator. Enclosed within chamber 29 is a steel ball 31. The resonator 27 functions in the now known manner to attenuate detonation frequency waves of frequency to which it is resonant.
- the Helmholtz resonator comprises a chamber mounted in a recess sunk in the top of the piston, and wherein the gas passage opening to said resonator chamber is located in the inside end region of said recess, and combustion chamber, and a gas passage is provided between the combustion chamber and said passage opening to said resonator chamber.
- a piston adapted for reciprocation in said cylinder, a Helmholtz resonator chamber mounted inside a recess sunk into the top of the piston, substantial side surface areas of said resonator chamber being spaced from the opposed surfaces of said recess, and restricted gas passage means opening from the inner end region of the space between said chamber and opposed recess surfaces into the inner end region of said resonator chamber.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
A. G. BODINE, JR 2,760,475 SELF-CLEANING DETONATION ATTENUATION MEANS FOR INTERNAL COMBUSTION ENGINES Original Filed July 2, 195] Aug. 28, 1956 INVENTOR. AL 51% 7 @fiOD/M', .JE
flrrokwfx United States Patent SELF-CLEANIN G DETONATION ATTENUATION MEANS FOR INTERNAL COMBUSTION EN- GINES Albert G. Bodine, Jr., Van Nuys, Calif.
Original application July 2, 1951, Serial No. 234,688, now
Patent No. 2,573,536, dated October 30, 1951. Divided and application October 24, 1951, Serial No. 252,818, now Patent No. 2,738,781, dated March 20, 1956. Divided and application December 6, 1955, Serial No. 551,263. Again divided and this application April 16, 1956, Serial No. 578,474
4 Claims. (Cl. 123-191) This invention relates generally to internal combustion engines and to means for suppressing irregular burning and detonation of fuel-air mixture therein. The invention is based on my discovery that detonation in combustion engines involves acoustic phenomena and can be alleviated by means of certain acoustic apparatus used in combination with the combustion chamber.
The present application is a division of my copending application Ser. No. 551,263, filed December 6, 1955, allowed February 15, 1956, entitled Piston Carried Detonation Suppression Means for Internal Combustion Engines. That parent application was in turn a division of my application Ser. No. 252,818, filed October 24, 1951, entitled Engine Detonation Control by Acoustic Methods and Apparatus, now Patent No. 2,738,781, which application was a division of my earlier application Ser. No. 234,688, filed July 2, 1951, entitled Engine Detonation Control by Acoustic Methods and Apparatus, now Patent No. 2,573,536.
The present invention is based on the fact that detonation in an engine combustion chamber produces sound waves, a large part of which rise to high amplitude at resonant frequencies of the chamber, and on my discovery that the sound waves produce the various wellknown and harmful manifestations of detonation. According to my basic invention, I inhibit or attenuate these harmful effects by interfering with or attenuating the high amplitude detonation-induced sound waves, and this is done by use in connection with the combustion chamber of acoustic attenuation means made responsive to the frequencies at which the detonation induced sound waves build up to high amplitudes.
A general object of the invention is the provision of simple and effective acoustic attenuator means for the combustion chamber of an internal combustion engine, with particular reference to substantial efiectiveness, simplicity, low cost, and with inclusion of a self-cleaning feature.
The acoustic attenuation means of the present invention is capable of being used in either the combustion chamber head Wall or the head wall of the piston, though comprising configurations particularly well adapted for incorporation in the head wall of the piston, and the invention will be so illustrated and described hereinafter, but without limitation thereto.
The invention will be best understood by reference immediately to the following detailed description of an illustrative embodiment thereof, in which:
Fig. 1 is a vertical transverse section through an internal combustion engine equipped with the wave attenuator configurations of the invention; and
Fig. 2 is a vertical medial section through the piston of the engine of Fig. 1, showing a plurality of attenuators in vertical medial section.
"ice
In the drawings, there is shown an illustrative L-head engine comprised of a water-cooled block 10, a watercooled head 11 fastened to block 10, a piston 14 working in cylinder 15 in block 10, exhaust valve 16, and spark plug 17. It will be understood that an intake valve (not shown) will be located along-side exhaust valve 16. The block 10 and head 11 are shown with more or less con-- ventional cooling jackets and head 11 has an inner combustion chamber wall 20 enclosing a combustion chamber space 21 over the cylinder and valves, as shown. The head or top wall 26 of the piston is formed with a plurality of bores 26a, in any suitable pattern, extending downwardly from its top surface, and an enlarged counterbore 26b extends upwardly from below. Helmholtz resonator structures, generally designated at 27, include a cylindric base portion 27a mounted in counterbore 26b, and secured in position by peening as at 27b. Extending upwardly from base portion 27a is a reduced cylindric member 28 forming a resonator chamber 29. As shown, the side walls of the cylinder 28 are annularly spaced from the defining walls of bore 26a, and the lower ends of the side walls of cylinder 28 are formed with a series of gas ports 30, which ports constitute the neck of the resonator. Enclosed within chamber 29 is a steel ball 31. The resonator 27 functions in the now known manner to attenuate detonation frequency waves of frequency to which it is resonant. The chamber being exposed to the flame, carbon accumulation therewithin is minimized. In addition the steel ball 31 is free to rattle about inside the chamber owing to the reciprocating motion of the piston, and this rattling ball has a scouring action on the inside surfaces of the chamber, whereby carbon accumulation is prevented.
It will be understood that the drawings and description are merely illustrative of one specific embodiment of the invention, and that various changes in design, structure and arrangement may be made without departing from the spirit and scope of the appended claims.
I claim:
1. For use with an internal combustion engine having a combustion chamber and a cylinder opening into said chamber, a piston adapted for reciprocation in said cylinder, a Helmholtz resonator chamber mounted on the top of said piston and provided with a restricted gas passage opening to said resonator chamber, and a ball loosely placed inside said resonator chamber to prevent carbon accumulating therewithin.
2. The subject matter of claim 1, wherein the Helmholtz resonator comprises a chamber mounted in a recess sunk in the top of the piston, and wherein the gas passage opening to said resonator chamber is located in the inside end region of said recess, and combustion chamber, and a gas passage is provided between the combustion chamber and said passage opening to said resonator chamber.
3. The subject matter of claim 2, wherein the sides of said resonator chamber are spaced from the opposed surfaces of said recess.
4. For use with an internal combustion engine having a combustion chamber and a cylinder opening into said chamber, a piston adapted for reciprocation in said cylinder, a Helmholtz resonator chamber mounted inside a recess sunk into the top of the piston, substantial side surface areas of said resonator chamber being spaced from the opposed surfaces of said recess, and restricted gas passage means opening from the inner end region of the space between said chamber and opposed recess surfaces into the inner end region of said resonator chamber.
No references cited.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US578474A US2760475A (en) | 1951-07-02 | 1956-04-16 | Self-cleaning detonation attenuation means for internal combustion engines |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US234688A US2573536A (en) | 1951-07-02 | 1951-07-02 | Engine detonation control by acoustic methods and apparatus |
US578474A US2760475A (en) | 1951-07-02 | 1956-04-16 | Self-cleaning detonation attenuation means for internal combustion engines |
Publications (1)
Publication Number | Publication Date |
---|---|
US2760475A true US2760475A (en) | 1956-08-28 |
Family
ID=26928206
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US578474A Expired - Lifetime US2760475A (en) | 1951-07-02 | 1956-04-16 | Self-cleaning detonation attenuation means for internal combustion engines |
Country Status (1)
Country | Link |
---|---|
US (1) | US2760475A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4501236A (en) * | 1982-08-09 | 1985-02-26 | Regents Of The University Of Minnesota | Method and apparatus for reducing damage associated with detonation and/or destructive knock |
US4567863A (en) * | 1982-08-09 | 1986-02-04 | Regents Of The University Of Minnesota | Apparatus for reducing damage associated with detonation and/or destructive knock |
US4570589A (en) * | 1982-08-09 | 1986-02-18 | Regents Of The University Of Minnesota | Method for reducing damage associated with detonation and/or destructive knock |
US20170167361A1 (en) * | 2015-12-15 | 2017-06-15 | Hyundai Motor Company | Vehicle engine |
US20180135507A1 (en) * | 2015-05-15 | 2018-05-17 | Cummins Inc. | Power cylinder apparatus for reducing unburnt hydrocarbon emissions |
US10774781B2 (en) | 2017-01-25 | 2020-09-15 | Tenneco, Inc. | Piston with anti-coking design features |
-
1956
- 1956-04-16 US US578474A patent/US2760475A/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
None * |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4501236A (en) * | 1982-08-09 | 1985-02-26 | Regents Of The University Of Minnesota | Method and apparatus for reducing damage associated with detonation and/or destructive knock |
US4567863A (en) * | 1982-08-09 | 1986-02-04 | Regents Of The University Of Minnesota | Apparatus for reducing damage associated with detonation and/or destructive knock |
US4570589A (en) * | 1982-08-09 | 1986-02-18 | Regents Of The University Of Minnesota | Method for reducing damage associated with detonation and/or destructive knock |
US20180135507A1 (en) * | 2015-05-15 | 2018-05-17 | Cummins Inc. | Power cylinder apparatus for reducing unburnt hydrocarbon emissions |
US10724424B2 (en) * | 2015-05-15 | 2020-07-28 | Cummins Inc. | Power cylinder apparatus for reducing unburnt hydrocarbon emissions |
US20170167361A1 (en) * | 2015-12-15 | 2017-06-15 | Hyundai Motor Company | Vehicle engine |
US10184389B2 (en) * | 2015-12-15 | 2019-01-22 | Hyundai Motor Company | Vehicle engine |
US10774781B2 (en) | 2017-01-25 | 2020-09-15 | Tenneco, Inc. | Piston with anti-coking design features |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2573536A (en) | Engine detonation control by acoustic methods and apparatus | |
US2760475A (en) | Self-cleaning detonation attenuation means for internal combustion engines | |
US2183674A (en) | Internal combustion engine using hydrogen as fuel | |
Russell | Automotive diesel engine noise and its control | |
US2738781A (en) | Engine detonation control by acoustic methods and apparatus | |
US2752908A (en) | Piston carried detonation suppression means for internal combustion engines | |
US2760474A (en) | Helmholtz resonator detonation attenuation means for internal combustion engines | |
US2760473A (en) | Detonation suppression helmholtz resonators for internal combustion engines | |
FR2407350A1 (en) | INTERNAL COMBUSTION ENGINE WITH NOISE DAMPER SHIELD | |
GB1235506A (en) | Internal combustion engine comprising a detonation wave attenuator | |
US4191136A (en) | Combustion chamber of an internal combustion engine | |
US2662514A (en) | Detonation suppression piston for internal-combustion engines | |
US2760477A (en) | Detonation spoilers for internal combustion engines | |
US2662516A (en) | Piston for internal-combustion engines having acoustic detonation suppression means | |
US4393830A (en) | Acoustic detonation suppression in a catalytic environment in internal combustion engine | |
US2712816A (en) | Replaceable acoustic absorber for internal combustion engine detonation suppression | |
US2752907A (en) | Acoustic detonation suppression plug-in device for internal combustion engines | |
US3063438A (en) | Means for suppressing combustion abnormalities in internal combustion engines | |
US2760476A (en) | Horn type detonation attenuation means for internal combustion engines | |
US2662517A (en) | Piston for internal-combustion engines having acoustic detonation suppression means | |
US2881751A (en) | Acoustic attenuation of engine detonation shock waves | |
US2662515A (en) | Detonation suppression piston for internal-combustion engines | |
US2133592A (en) | Cylinder head | |
US2760472A (en) | Engine detonation control by acoustic methods and apparatus | |
US2959161A (en) | Internal-combustion compression-ignition engine with localised self-ignition of the fuel |