|Publication number||US3768258 A|
|Publication date||Oct 30, 1973|
|Filing date||May 13, 1971|
|Priority date||May 13, 1971|
|Publication number||US 3768258 A, US 3768258A, US-A-3768258, US3768258 A, US3768258A|
|Inventors||H Smith, D Saurenman|
|Original Assignee||Consan Pacific Inc|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (2), Referenced by (95), Classifications (18), Legal Events (1)|
|External Links: USPTO, USPTO Assignment, Espacenet|
United States Patent i191 Smith et a1.
[ 1 Oct. 30, 1973 POLLUTING FUME ABATEMENT APPARATUS Inventors: Harold W. Smith, San Marino;
Donald G. Saurenman, Whittier, both of Calif.
Consan Pacific Incorporated, Whittier, Calif.
Filed: May 13, 1971 Appl. No.: 143,143
U.S. Cl 60/275, 55/107, 55/131, 55/138, 55/146, 55/152, 55/D1G. 30, 60/297 Int. Cl F0ln-3/00 Field of Search 60/275, 297; 55/2, 55/146, 152, 155, 131, 138,120, DIG. 30,
r 102, 107, 140;317/2 E,2F, 3,4
References Cited UNITED STATES PATENTS Barr 60/320 3,331,192 7/1967 Peterson 55/107 Primary Examiner-Douglas Hart Attorney-White, Haefliger and Hachand  ABSTRACT Fume abatement apparatus comprises, in combination,
a. an exhaust duct for passing a stream of engine products of combustion having electrically chargeable content, and
b. means including an ion generator to effect a flow of ions into said stream, with ion density and polarity to so change the electrical charge of said content as to enhance subsequent precipitation thereof on a surface.
8 Claims, 3 Drawing Figures VO LTA 6 E SOURCE POLLUTING FUME ABATEMENT APPARATUS BACKGROUND OF THE INVENTION trostatics. Particularly, apparatus and methods involving modes of operation characterized by the present invention have not beenforthcoming. In this regard,.recent tests show that automobiles with attached conventional devices for controlling smog can produce around 200 billion submicron particles per cubic foot of exhaust, compared with about 100 billionsuch particles for old cars without such devices.
SUMMARY OF THE INVENTION It is a major object of the invention to provide internal combustion engine exhaust fume abatement apparatus comprising an exhaust duct for passing a stream of engine products of combustion having electrically chargeable content; and, means including an ion generator operating to effect a flow of ions into the stream, with ion density and polarity to so change the electrical charge of such content as to enhance subsequent precipitation on a surface. As will be seen, the generator may typically comprise multiple pointed tips proximate the duct, and a high voltage supply connected with the tips.
In one form of the invention, the tips may be exposed to the exhaust stream, and in another form an insulative shroud may protect the tips from direct exposure to the growing exhaust, the shroud defining an outlet for ions to pass from the tips to the stream path. As to the latter, means may be provided to pass auxiliary gas such as air to the tips to travel with the ions into the stream. Further, the duct downstream of the locus of ion flow into the stream may advantageously have an insulative inner surface exposed to the stream; the duct may comprise an exhaust pipe or stack extending horizontally or vertically; and the duct may direct the ion treated exhaust at the ground for charged particle collection.
These and other objects and advantages of the invention, as well as details of an illustrative embodiment, will be more fully understood from the following description and drawings, in which:
DRAWING DESCRIPTION FIGS. 1-3 are vertical sections showing different forms of the invention.
DETAILED DESCRIPTION In FIG. 1, an internal combustion engine, of Otto, Diesel, Wankel or other type, is indicated schematically at as delivering exhaust at 11 to the horizontal tail pipe or duct 12. Such products of combustion may have electrically chargeable content such as submicron particles and larger hydrocarbon molecules, and tests indicate that there are in excess of 100 billion submicron particles per cubic foot of exhaust.
In accordance with the invention, an ion generator is provided to effect a flow of ions into the exhaust stream 14 in the pipe, with ion density and polarity to so change the electrical charge of the content as to enhance substantially the subsequent precipitation of the latter on a surface. In this regard, the extent of duct 80 downstream of the ion generator may have an electrically insulative inner surface or coating (ceramic, plastic or other) at 15 exposed to the charged stream, preventing neutralization of the ions and particulate charge during discharge flow of the exhaust from the generator to the duct outlet 16. The latter may be directed downwardly to discharge the content 14 toward and at the ground surface 17, where the particles becomeneutralized and collect, removed from the atmosphere.
The ion generator in FIG. 1 includes multiple pointed tips 18 proximate to, as for example, within the duct 12, and ahigh voltage supply 19 electrically connected with the tips. The latter may be defined by metallic needle 20 diverging in a downstream direction and in a cluster as shown, as is more particularly described in U. S. Pat. No. 3,308,344 to Harold Smith and George A. Korkos, A lead 21 connects the source with the needles via a mounting rod or needle 22 which may be carried by streamlined insulator body 23. Further, an insulative shroud may project at 24 in protective relation to the tips to prevent direct impingement of exhaust flow on the tips, the shroud defining an outlet at 26 for ions to pass at 27 from the tips into the exhaust stream. Body 23, and shroud 24 may consist of insulative (as for example plastic) material. Radial ribs 28 may support the body and shroud in the duct 80. Other types of shrouds, supports and ion emitting configurations may be employed so long as the referred to functions and modes of operation are realized. Duct may be easily attached at 81 to pipe 12, and the latter carried at 83 by vehicle structure 84.
In FIG. 2, the engine 10a delivers exhaust to the duct 12 via a catalytic reactor 30 operating to change the molecular content of the flow to less noxious form. For example, CO may be oxidized to C0,, and NO dissociated to form N and O in the reactor. Particulate content emanating from the reactor is processed as described above and as to be described. The reactor 30 could alternatively be placed downstream of the ion generator.
The ion generator again includes multiple tips 31 to which high voltage, of selected polarity, is supplied. For example, over 5,000 volts DC negative may be employed, considering that the ground surface 17 to which the charged particles are to be attracted is normally positive. An insulative support for the needle cluster 31 as indicated at 33, and a shroud at 34.
Means is provided to pass auxiliary gas to the tips to travel with the ions into the exhaust flow 35. Such means may include an air scoop or pump 36 outside the duct 80, and a line 37 to deliver the air to the ion generator, as for example to porting 38 in the support 33 opening to the region 39 in the shroud containing the needle cluster. Such air flow 101 tends to prevent exhaust backflow into the shroud, keeping the needles and tips clean and free of exhaust deposits.
In FIG. 3, exhaust from engine 40 is delivered at 41 to a vertical pipe or stack 42 as is found on trucks carrying Diesel engines. Ion generators 43, shrouded at 50, are carried by the stack wall and with spacing such as to direct positive ions 102 into the upward flow 44 of exhaust. A charged particle trap, as for example, a negatively charged grid or grids 45 is mounted downstream of the generators 43. The generators may produce positive ions to positively charge the particulate content of the exhaust, voltage supply being indicated at 46. Trap 45 may alternatively consist of steel wool or the like, and may be removable replacement, as facilitated by removal of stock upper section 42a. An insulative screen or liner 48 extends within the stack between the ion generator 43 and the grid or grids.
1. Internal combustion engine exhaust fume abatement apparatus comprising, in combination,
a. an exhaust duct for passing a stream of engine products of combustion having electrically chargeable content,
b. means including an ion generator comprising multiple pointed tips to effect a flow of ions into said stream, with ion density and polarity to so change the electrical charge of said content as to enhance subsequent precipitation thereof on a surface,
c. an insulative shroud for said tips and exposed to said stream in an upstream direction, the shroud extending in protective relation to the tips to prevent direct impingement thereon of the engine products of combustion, and the shroud defining a downstream facing outlet for ions to pass from the tips to the stream path downstream of the tips, and
d. the duct having an electrically insulative lining extending from a region upstream of said shroud outlet and at the exterior thereof to a region proximate an outlet to the atmosphere defined by the duct to inhibit neutralization of said ions during their flow in the duct.
2. The combination of claim 1 including an internal combustion engine operatively connected with said duct to supply said stream thereto.
3. The combination of claim 1 wherein said means includes a high voltage supply electrically connected with said tips.
4. The combination of claim 1 wherein said tips are exposed to said stream in a downstream direction, only.
5. The combination of claim 1 where said shroud tapers in an upstream direction and extends in the duct to reduce the duct cross sectional area thereby effecting an increase in the stream velocity past the shroud and tips for mixing with the ions 6. The combination of claim 5 including means to pass auxiliary gas to said tips to travel with the ions into the stream.
7. The combination of claim 1 wherein said ion generator includes a source of positive voltage in excess of +l0,000 volts to effect positive ion flow into the stream.
8. The combination of claim 1 wherein said duct is defined by a vehicle tail pipe with said duct outlet directed toward the ground underlying the vehicle.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US2037692 *||Apr 20, 1935||Apr 21, 1936||Barr||Exhaust oxidizing receiver|
|US3331192 *||Mar 30, 1966||Jul 18, 1967||Peterson Floyd V||Electrical precipitator apparatus of the liquid spray type|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3957374 *||Jan 14, 1975||May 18, 1976||Carl Zeiss-Stiftung||Apparatus for obtaining samples of dusts for analysis by spectrochemical examination|
|US4098578 *||May 28, 1976||Jul 4, 1978||Stanton Anthony A||Ionization of exhaust gases|
|US4317661 *||Aug 17, 1979||Mar 2, 1982||Matsushita Electric Industrial Co., Ltd.||Electronic air cleaner|
|US4376637 *||Oct 14, 1980||Mar 15, 1983||California Institute Of Technology||Apparatus and method for destructive removal of particles contained in flowing fluid|
|US4741746 *||Jan 12, 1987||May 3, 1988||University Of Illinois||Electrostatic precipitator|
|US4908047 *||Oct 9, 1987||Mar 13, 1990||Kerr-Mcgee Coal Corporation||Soot removal from exhaust gas|
|US4999998 *||Jan 17, 1989||Mar 19, 1991||E-Quad, Inc.||Method and apparatus for elimination of toxic oxides from exhaust gases|
|US5041145 *||May 15, 1990||Aug 20, 1991||Niles Parts Co., Ltd.||Bridged stream corona generator|
|US5084078 *||Nov 28, 1990||Jan 28, 1992||Niles Parts Co., Ltd.||Exhaust gas purifier unit|
|US5147423 *||Mar 1, 1991||Sep 15, 1992||Richards Clyde N||Corona electrode for electrically charging aerosol particles|
|US5332425 *||Feb 22, 1993||Jul 26, 1994||Hung Hsing Electric Co., Ltd.||Air purifier|
|US5410871 *||Mar 29, 1993||May 2, 1995||Unlimited Technologies, Inc.||Emission control device and method|
|US5578112 *||Jun 1, 1995||Nov 26, 1996||999520 Ontario Limited||Modular and low power ionizer|
|US5707429 *||Sep 25, 1996||Jan 13, 1998||Lewis Lint Trap, Inc.||Ionizing structure for ambient air treatment|
|US5824137 *||Jul 12, 1996||Oct 20, 1998||Gutsch; Andreas||Process and apparatus to treat gas-borne particles|
|US5948141 *||Sep 30, 1997||Sep 7, 1999||Hewlett-Packard Company||Method and apparatus for purification of a discharge gas|
|US5950424 *||Oct 7, 1996||Sep 14, 1999||Kabushiki Kaisya O - Den||Diesel engine exhaust particle collection device|
|US6004375 *||Oct 20, 1998||Dec 21, 1999||Gutsch; Andreas||Process and apparatus to treat gasborne particles|
|US6056808 *||May 31, 1996||May 2, 2000||Dkw International Inc.||Modular and low power ionizer|
|US6136074 *||Nov 12, 1999||Oct 24, 2000||Funai Electric Co., Ltd.||Air conditioning apparatus with an air cleaning function and electric dust collector for use in the same|
|US6156103 *||May 28, 1999||Dec 5, 2000||Hewlett-Packard Company||Discharge gas purification system|
|US6228149 *||Jan 20, 1999||May 8, 2001||Patterson Technique, Inc.||Method and apparatus for moving, filtering and ionizing air|
|US6436170 *||Jun 23, 2000||Aug 20, 2002||Air Products And Chemical, Inc.||Process and apparatus for removing particles from high purity gas systems|
|US6461409 *||Mar 24, 2000||Oct 8, 2002||Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.||Device and method for treating flowing gases, in particular exhaust gases|
|US6471752||Oct 16, 2000||Oct 29, 2002||Lewis Lint Trap, Inc.||Ionizing structure for ambient air treatment|
|US6506232 *||Mar 13, 2001||Jan 14, 2003||Ion Systems, Inc.||Air ionization apparatus and method for efficient generation and cleaning|
|US6517608||Jun 28, 2002||Feb 11, 2003||Air Products And Chemicals, Inc.||Process and apparatus for removing particles from high purity gas systems|
|US6527829 *||Mar 15, 2000||Mar 4, 2003||Fortum Oyj||Method and arrangement for purifying the intake air of a gas turbine|
|US6620224 *||Aug 12, 2002||Sep 16, 2003||Kabushiki Kaisha Circland||Air purification device with a needle-shaped electrode having a protective cover thereon|
|US6656248 *||Oct 3, 2001||Dec 2, 2003||Moira Ltd.||Method and apparatus to clean air|
|US6758884 *||Aug 7, 2002||Jul 6, 2004||3M Innovative Properties Company||Air filtration system using point ionization sources|
|US6807044||May 1, 2003||Oct 19, 2004||Ion Systems, Inc.||Corona discharge apparatus and method of manufacture|
|US6989050 *||Jan 29, 2002||Jan 24, 2006||Alexandr Akhatovich Ganeev||Device for accumulating aerosols from gases|
|US7052531 *||Mar 31, 2003||May 30, 2006||Takashi Kishioka||Local cleaning system for constructing clean shielded space with no need for dedicated partition wall, using charged air shower unit providing ion wind and local exhaust device|
|US7101424 *||Jan 28, 2005||Sep 5, 2006||Forschungszentrum Karlsruhe Gmbh||Ionizer and use thereof in an exhaust gas purifying system for moisture-laden gases|
|US7105041 *||Jun 21, 2004||Sep 12, 2006||Dunn John P||Grid type electrostatic separator/collector and method of using same|
|US7105042 *||Jan 18, 2005||Sep 12, 2006||Mann & Hummel Gmbh||Apparatus for separating aerosols or particles from gases|
|US7141098||Jan 22, 2004||Nov 28, 2006||3M Innovative Properties Company||Air filtration system using point ionization sources|
|US7318856 *||Dec 3, 2004||Jan 15, 2008||Sharper Image Corporation||Air treatment apparatus having an electrode extending along an axis which is substantially perpendicular to an air flow path|
|US7435288 *||Dec 29, 2006||Oct 14, 2008||Hyundai Motor Company||System for filtering particulate matter of diesel particulate filter|
|US7465340 *||Nov 29, 2006||Dec 16, 2008||Smc Corporation||Ionizer with parts-extension unit|
|US7497898 *||Oct 23, 2007||Mar 3, 2009||Smc Corporation||Ionizer|
|US7537647 *||May 30, 2006||May 26, 2009||S.C. Johnson & Son, Inc.||Air purifier|
|US7553354 *||Nov 12, 2004||Jun 30, 2009||Absalut Ecology Establishment||Apparatus and method for reducing and removing airborne oxidized particulates|
|US7585352||Apr 28, 2006||Sep 8, 2009||Dunn John P||Grid electrostatic precipitator/filter for diesel engine exhaust removal|
|US7695552 *||Apr 13, 2010||Smc Corporation||Ionizer|
|US7708803 *||Nov 3, 2006||May 4, 2010||Electric Power Research Institute, Inc.||Method and apparatus for the enhanced removal of aerosols from a gas stream|
|US7731781 *||Sep 14, 2007||Jun 8, 2010||Electric Power Research Institute, Inc.||Method and apparatus for the enhanced removal of aerosols and vapor phase contaminants from a gas stream|
|US7793506||Sep 14, 2010||Wyle Laboratories, Inc.||Emission controlled engine exhaust static test stand|
|US8029600||Oct 4, 2011||Electric Power Research Institute, Inc.||Sorbent filter for the removal of vapor phase contaminants|
|US8038775 *||Oct 18, 2011||Peter Gefter||Separating contaminants from gas ions in corona discharge ionizing bars|
|US8048200 *||Nov 1, 2011||Peter Gefter||Clean corona gas ionization for static charge neutralization|
|US8143591||Oct 22, 2010||Mar 27, 2012||Peter Gefter||Covering wide areas with ionized gas streams|
|US8167985||May 1, 2012||Peter Gefter||Clean corona gas ionization for static charge neutralization|
|US8206494 *||Jul 24, 2006||Jun 26, 2012||Cnrs||Device for air/water extraction by semi-humid electrostatic collection and method using same|
|US8241398 *||Apr 22, 2010||Aug 14, 2012||Electric Power Research Institute, Inc.||Method and apparatus for the enhanced removal of aerosols and vapor phase contaminants from a gas stream|
|US8416552||Apr 9, 2013||Illinois Tool Works Inc.||Self-balancing ionized gas streams|
|US8425657 *||Dec 17, 2008||Apr 23, 2013||Technische Universiteit Delft||Use of an electric field for the removal of droplets in a gaseous fluid|
|US8460433||Apr 14, 2012||Jun 11, 2013||Illinois Tool Works Inc.||Clean corona gas ionization|
|US8663373 *||May 7, 2010||Mar 4, 2014||Xiang Gao||Free radical injection ionizer for flue gas treatment with corona discharge|
|US8693161||Dec 30, 2012||Apr 8, 2014||Illinois Tool Works Inc.||In-line corona-based gas flow ionizer|
|US8717733||Dec 30, 2012||May 6, 2014||Illinois Tool Works Inc.||Control of corona discharge static neutralizer|
|US8883103 *||Jan 16, 2014||Nov 11, 2014||Denso International America, Inc.||Catalytic converter for treating ionized exhaust|
|US20040025695 *||Aug 7, 2002||Feb 12, 2004||3M Innovative Properties Company||Air filtration system using point ionization sources|
|US20040045442 *||Jan 29, 2002||Mar 11, 2004||Karichev Ziya Ramizovich||Method and device for removing inert impurities|
|US20040187681 *||Mar 31, 2003||Sep 30, 2004||Takashi Kishioka||Local cleaning system for constructing clean shielded space with no need for dedicated partition wall, using charged air shower unit providing ion wind and local exhaust device|
|US20040218337 *||May 1, 2003||Nov 4, 2004||Gregory Vernitsky||Corona discharge apparatus and method of manufacture|
|US20040226446 *||Jun 21, 2004||Nov 18, 2004||Dunn John P.||Grid type electrostatic separator/collector and method of using same|
|US20050126392 *||Jan 28, 2005||Jun 16, 2005||Thomas Wascher||Ionizer and use thereof in an exhaust gas purifying system for moisture-laden gases|
|US20050160907 *||Jan 22, 2004||Jul 28, 2005||3M Innovative Properties Company||Air filtration system using point ionization sources|
|US20050235829 *||Jan 18, 2005||Oct 27, 2005||Mann & Hummel Gmbh||Apparatus for separating aerosols or particles from gases|
|US20060021503 *||Jul 30, 2004||Feb 2, 2006||Caterpillar, Inc.||Electrostatic precipitator particulate trap with impingement filtering element|
|US20060187609 *||Apr 28, 2006||Aug 24, 2006||Dunn John P||Grid Electrostatic Precipitator/Filter for Diesel Engine Exhaust Removal|
|US20070144345 *||Nov 12, 2004||Jun 28, 2007||Borisenko Alexander V||Apparatus and method for reducing and removing airborne oxidized particulates|
|US20080014765 *||Nov 29, 2006||Jan 17, 2008||Smc Corporation||Ionizer with parts-extension unit|
|US20080034851 *||Aug 11, 2006||Feb 14, 2008||Wyle Laboratories, Inc.||Emission controlled engine exhaust static test stand|
|US20080072756 *||Dec 29, 2006||Mar 27, 2008||Kangsoo Lee||System for filtering particulate matter of diesel particulate filter|
|US20080098895 *||Oct 23, 2007||May 1, 2008||Smc Corporation||Ionizer|
|US20080105120 *||Nov 3, 2006||May 8, 2008||Mark Simpson Berry||Method and apparatus for the enhanced removal of aerosols from a gas stream|
|US20080105121 *||Nov 3, 2006||May 8, 2008||Ramsay Chang||Sorbent filter for the removal of vapor phase contaminants|
|US20080115704 *||Sep 14, 2007||May 22, 2008||Mark Simpson Berry||Method and Apparatus for the Enhanced Removal of Aerosols and Vapor Phase Contaminants from a Gas Stream|
|US20080190294 *||Jan 16, 2008||Aug 14, 2008||Smc Corporation||Ionizer|
|US20080295687 *||Jul 24, 2006||Dec 4, 2008||Ernest Galbrun||Device for Air/Water Extraction by Semi-Humid Electrostatic Collection and Method Using Same|
|US20090071328 *||Oct 10, 2008||Mar 19, 2009||Dunn John P||Grid type electrostatic separator/collector and method of using same|
|US20090090101 *||Apr 4, 2007||Apr 9, 2009||Soo Won Kim||Exhaust Gas-Discharging Device of Vehicle|
|US20090320678 *||Mar 25, 2009||Dec 31, 2009||Electric Power Research Institute, Inc.||Sorbent Filter for the Removal of Vapor Phase Contaminants|
|US20100202945 *||Aug 12, 2010||Electric Power Research Institute, Inc.||Method and Apparatus for the Enhanced Removal of Aerosols and Vapor Phase Contaminants from a Gas Stream|
|US20100269692 *||Oct 28, 2010||Peter Gefter||Clean corona gas ionization for static charge neutralization|
|US20100326274 *||Dec 17, 2008||Dec 30, 2010||Technische Universiteit Delft||Use of an electric field for the removal of droplets in a gaseous fluid|
|US20110096457 *||Apr 28, 2011||Illinois Tool Works Inc.||Self-balancing ionized gas streams|
|US20110126712 *||Jun 2, 2011||Peter Gefter||Separating contaminants from gas ions in corona discharge ionizing bars|
|US20110296996 *||May 7, 2010||Dec 8, 2011||Xiang Gao||Free radical injection ionizer for flue gas treatment with corona discharge|
|EP0899014A1 *||Feb 27, 1998||Mar 3, 1999||Galaxy Yugen Kaisha||Electrostatic precipitator and incinerator|
|EP1614971A2 *||Dec 30, 2004||Jan 11, 2006||Lg Electronics Inc.||Air purifier|
|WO2004018107A1 *||Jul 29, 2003||Mar 4, 2004||John Dunn||Grid type electrostatic separator/collector and method of using same|
|U.S. Classification||60/275, 60/297, 96/97, 96/55, 55/DIG.300|
|International Classification||F02B1/04, F01N3/01, B03C3/38, F01N3/08|
|Cooperative Classification||F01N3/0892, Y02T10/20, B03C3/38, F01N3/01, F02B1/04, Y10S55/30|
|European Classification||F01N3/08C, F01N3/01, B03C3/38|
|Jun 5, 1987||AS||Assignment|
Owner name: CUMMING CORPORATION, 9620 TOPANGA CANYON PLACE, CH
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:CONSAN PACIFIC INCORPORATED;REEL/FRAME:004727/0398
Effective date: 19860804
Owner name: CUMMING CORPORATION, A CA. CORP.,CALIFORNIA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CONSAN PACIFIC INCORPORATED;REEL/FRAME:004727/0398