US3727597A - Device for precipitating fuel from the vapor discharging from the fuel supply system of an internal combustion engine - Google Patents

Device for precipitating fuel from the vapor discharging from the fuel supply system of an internal combustion engine Download PDF

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Publication number
US3727597A
US3727597A US00035666A US3727597DA US3727597A US 3727597 A US3727597 A US 3727597A US 00035666 A US00035666 A US 00035666A US 3727597D A US3727597D A US 3727597DA US 3727597 A US3727597 A US 3727597A
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Prior art keywords
fuel
air
filter
chamber
air filter
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US00035666A
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English (en)
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P Hensler
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Dr Ing HCF Porsche AG
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Dr Ing HCF Porsche AG
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    • 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
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir

Definitions

  • ABSTRACT A device 'for precipitating fuel from the vapor discharging from the fuel supply system of an internal combustion engine in which the fuel tank and the mixture-forming system, especially the carburetor float chamber, is connected through pipe lines to a chamber sealed to the atmosphere and defined by the volume of the intake air filter.
  • a filter insert is placed ahead of the air intake and has a layer of activated carbon which absorbs the fuel particles from the vapor passing through the filter.
  • the intake air filter is also provided with an exhaust-connecting piece which is connected to the suction side of a blower exhausting into the atmosphere.
  • the blower is driven by an electric motor which is supplied with power through a contact provided in the starting-ignition switch and a time-control element which automatically interrupts the current supply to the blower motor after a predetermined time period.
  • the present invention relates to a device for precipitating fuel from the air discharging from the fuel supply system of an internal combustion engine, especially for motor vehicles driven by an internal combustion engine, and more particularly, to a device wherein the fuel tank and the mixture-formingsystem, especially the carburetor floatchamber, is connected through pipelines to a chamber sealed to the atmosphere.
  • the underlying problems are solved in accordance with the present invention by providing that the chamber onto which the fuel tank and the mixtureforming system are connected is formed through the volume of the suction air or intake filter of the internal combustion engine, whereby a filter is placed ahead of the air intake or other openings in the suction air filter which prevents passage of fuel particles.
  • the filter ahead of the opening in the suction air filter is provided with a layer of activatedcarbon which absorbs the fuel particles from the air passing through the filter.
  • the filter which is placed ahead of the openings of the suction air filter, is formed through a filter insert of the suction air filter and coated with activated carbon.
  • the suction air filter has a special exhaust connecting piece which is connected to the suction side of a blower exhausting into the atmosphere, whereby a filter coated with activated carbon is arranged ahead or in this exhaust connecting piece.
  • blower for the heat and cold air supply in the air-conditioning installation of the motor vehicle which is available.
  • the blowers which are driven by electric motors are,.in an inventive manner, supplied with current for the suction process through a contact provided in the starting-igniti0n switch, whereby a time-control element is also provided which automatically interrupts the current supply to the blower motor after a predetermined time period, which blower motor is sufficient for exhausting the fuel vapor from the fuel supply system of the internal combustion engine.
  • the present invention minimizes the discharge of fuel vapor from the fuel supply system of the internal combustion engine of a motor vehicle and the device may subsequently be built into the motor vehicle without structural changes of the motor vehicle or the internal combustion engine.
  • an activated carbon filter has the further advantage in that the filter insert of the intake air filter which is also available anyhow is simply matched to the requirements of the device of the present invention through a coating of activated carbon, whereby use of activated carbon has the further advantage that it is constantly regenerated during operation of the internal combustion engine by the fresh air sucked through the filter and, therefore, is available for absorption of the fuel particles at each shut-down to a full degree.
  • the air filter insert must be renewed after certain time periods depending upon the driving power of the motor vehicle, renewal of the activated carbon filter at certain intervals is also assured.
  • the device of the present invention therefore does not require special attention either by the user or by the customer service department so that an optimum operational safety is assured.
  • the filter ahead of the openings of the suction air filter consists of a mesh as a support covered with linen cloth, a coating of activated carbon and filter paper covering the same.
  • Filter inserts in which a layer of folded filter paper is arranged in a basket consisting ofa mesh or the like may be provided at the inner circumference of the basket with a covering of linen cloth, whereby the hollow spaces between the folds of the filter paper and the outer circumference of the basket is filled with activatedcarbon.
  • FIG. 1 is a schematic view of a fuel supply system for the internal combustion engine of a motor vehicle in connection with the fuel separating device of the present invention
  • FIG. 2 is a partial cross-sectional view of the general construction of a filter coated with activated carbon for the device of the present invention
  • FIG. 3 is a partial, sectionalized perspective view illustrating a filter insert coated with activated carbon for a suction air filter
  • FIG. 4 is a view similar to FIG. 3 showing another construction of a filter insert coated with activated carbon for a suction air filter.
  • the air intake or suction filter 6 is provided with a suction opening 8 ahead of which is arranged an air funnel 9.
  • a filter insert 10 is arranged inside the air filter 6 and covers the entire height of the air intake filter 6'.
  • the filter insert 10 is provided with a coating 11 of activated carbon which absorbs the fuel particles from the air passing through the filter insert 10.
  • a passage 12 leading to the fuel tank 1 is connected to the volume of the intake air or suction filter 6 defined by the filter insert 10 so that the developing or existing fuel vaper inside the fuel supply system when the internal combustion engine 5 is not in operation cannot escape into the atmosphere without passing through the filter insert 10, whereby the fuel portion is removed by the activated carbon coating 11 so that the vapor is essentially fuel-free, that is, clean air may emerge from the intake filter 6.
  • the air intake filter 6 is provided with a special exhaust-connecting piece 13 which is connected with the intake side ofa blower 14 discharging into the atmosphere.
  • the fuel vapor drawn by the blower 14 from the fuel supply system must pass through the activated carbon-coated filter insert 10 in its path to the atmosphere, whereby the fuel particles are removed by the activated carbon 11.
  • the blower 14 is driven by an electric motor 15, the power source of which includes a contact 16 in the starting-ignition switch 17 and a time-control element 18, whereby the power source of the electric motor 15 is automatically energized through the contact 16 in the starting-ignition switch 17 when the internal combustion engine 5 is shut-down and is automatically disconnected through the time-control element 18 after a predetermined time period or span.
  • a closing flap 19 is inserted into the exhaust-connecting piece 13 which prevents air passage in the direction of suction to the intake air filter 6.
  • an expansion tank 20 is inserted into the flow path 12 at an appropriate position through which at least a considerable portion of the vapor emerging from the fuel tank 1 is separated mechanically.
  • the activated carbon coated filter shown in FIG. 2, consists of a mesh 22 as a support and is covered with linen cloth 21, a coating of activated carbon 11 and filter paper 23 covering the activated carbon 11. This arrangement is selected so that the more intensely flowing intake air of the internal combustion engine 5 flows first through the filter paper 23, then through the activated carbon layer 11 and finally through the support covered with linen cloth 21 and mesh 22.
  • FIGS. 3 and 4 Practical embodiments of such a construction of a filter insert 10 are exemplified in FIGS. 3 and 4.
  • the filter insert 10 has alayer of folded filter paper 24 arranged in a circular basket consisting of an outer mesh 25 and an inner mesh 26 whereby the inner mesh 26 is covered with linen cloth 27.
  • the coating 11 with activated carbon is thereby formed so that the hollow spaces formed between the folds of the filter paper 24 and the inner mesh 26, that is the linen cloth 27 covering it, are filled with activated carbon 11.
  • the fuel vapor enters the filter through the inner mesh 26 and is freed of fuel particles through the activated carbon layer 1 1.
  • the intake air for the internal combustion engine 5 enters through the outer mesh 25 and passes through the activated carbon layer 11 in the direction of arrow S, whereby simultaneously a regeneration of the activated carbon layer takes place.
  • the filter insert illustrated in FIG. 4 is of basically the same construction as that shown in FIG. 3. However, the difference resides in the consideration of the reversed flow direction in the direction of arrow R of the intake air with the hollow spaces formed between the folds of the filter paper 24 and the outer mesh 25 provided with linen cloth covering 27 being filled with activated carbon 11.
  • the fuel vapor rising either through internal heat energy or under the effect of blower 14 in the intake filter 6 is partially precipitated by mechanical means through the chamber of the intake filter 6 or is freed of fuel particles with the passage through the activated carbon coated filter insert 10, whereby the activated carbon 11 absorbs the fuel particles.
  • the activated carbon 11 absorbs the fuel particles.
  • fresh air passes through the activated carbon layer 11 and is regenerated under the effect of fresh air so that at the time of the shut-down of the internal combustion engine 5, regenerated activated carbon is always available for renewed absorption of fuel particles.
  • Device for adsorbing fuel from the vapor emerging from the fuel supply system of an internal combustion engine, especially for motor vehicles comprising a fuel tank, mixture-forming means, an air filter housing hav-' ing air-intake means and first and second air outlet means, said first air outlet means communicating with the internal combustion engine, air filter means arranged in said air filter housing between said intake air means and said first air outlet means and between said first air outlet means and said second air outlet means said air filter means forming a chamber within said air filter housing, passage means connecting said fuel tank and said mixture-forming means to said chamber such that said passage means communicates with at mosphere only by way of said air filter means, said air filter means filtering air and adsorbing fuel from the vapor passing therethrough, and suction means connected to said second air outlet means for drawing vapor within said chamber from said chamber through said air filter means such that the fuel portion of the vapor is adsorbed by said air filter means and filtered air is discharged to atmosphere.
  • the air filter means includes a mesh constructed as a support, a linen cloth covering arranged on the mesh, filter paper associated therewith, and activated carbon coating arranged between the cloth covering and the filter paper for adsorbing fuel vapor.
  • the mesh is in the form of a basket having an inner and outer circumference, the filter paper being in a folded condition and inserted in the basket, the linen cloth covering being arranged at the inner basket circumference, and the activated carbon being provided in the folds of the filter paper creating hollow spaces.
  • the mesh is in the form of a basket having an inner and outer circumference, the filter paper being in a folded condition and inserted in the basket, the linen cloth covering being arranged at the outer basket circumference, and the activated carbon being provided between the cloth covering and the folds of the filter paper creating hollow spaces.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
US00035666A 1969-05-28 1970-05-08 Device for precipitating fuel from the vapor discharging from the fuel supply system of an internal combustion engine Expired - Lifetime US3727597A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691927046 DE1927046A1 (de) 1969-05-28 1969-05-28 Einrichtung zum Abscheiden von Brennstoff aus der aus dem Brennstoffversorgungssystem einer Brennkraftmaschine austretenden Luft

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US3727597A true US3727597A (en) 1973-04-17

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US00035666A Expired - Lifetime US3727597A (en) 1969-05-28 1970-05-08 Device for precipitating fuel from the vapor discharging from the fuel supply system of an internal combustion engine

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US (1) US3727597A (OSRAM)
DE (1) DE1927046A1 (OSRAM)
FR (1) FR2046542A5 (OSRAM)
GB (1) GB1275845A (OSRAM)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3877454A (en) * 1971-04-27 1975-04-15 Daimler Benz Ag Air separator
US4139354A (en) * 1977-07-21 1979-02-13 Futurecraft Corporation Filter for the removal of particulate and vaporous mercury
US4259096A (en) * 1978-01-19 1981-03-31 Nippondenso Co., Ltd. Fuel vapor adsorption type air cleaner element for internal combustion engine
US4261717A (en) * 1979-10-15 1981-04-14 Canadian Fram Limited Air cleaner with fuel vapor door in inlet tube
US4322230A (en) * 1980-09-08 1982-03-30 Donaldson Company, Inc. Unitized gas-particulate filter and housing
US4386947A (en) * 1980-04-25 1983-06-07 Nippon Soken, Inc. Apparatus for adsorbing fuel vapor
US4658796A (en) * 1983-03-09 1987-04-21 Aisan Industry Co., Ltd. System for preventing loss of fuel due to evaporation
US4683862A (en) * 1986-04-14 1987-08-04 General Motors Corporation Fuel vapor storage canister
US4714485A (en) * 1986-04-14 1987-12-22 General Motors Corporation Fuel vapor storage canister
US5350443A (en) * 1993-04-19 1994-09-27 Bluecher Hasso Von Filter sheet material for passenger cabins in motor vehicles
US5423903A (en) * 1990-12-03 1995-06-13 Schmitz; Michael Air filter
US6425380B2 (en) * 1998-04-30 2002-07-30 Aisan Kogyo Kabushiki Kaisha Canister for evaporated fuel treatment apparatus
WO2002079633A1 (en) * 2001-03-30 2002-10-10 Honeywell International Inc. Vapor-adsorbent filter for reducing evaporative fuel emissions, and method of using same
US6581580B2 (en) 2001-01-24 2003-06-24 Ford Global Technologies, Inc. Hydrocarbon vapor evacuation system
US6692551B2 (en) 2002-07-17 2004-02-17 Delphi Technologies, Inc. Air cleaner assembly and process
US6692555B2 (en) * 2001-03-16 2004-02-17 Toyoda Boshoku Corporation Internal combustion engine air cleaner and adsorption filter
US6692554B1 (en) * 2002-12-10 2004-02-17 Visteon Global Technologies, Inc. Methane storage device
US6699310B2 (en) * 2001-12-26 2004-03-02 Toyoda Boshoku Corporation Evaporative fuel adsorbing member and air cleaner
US20040065197A1 (en) * 2002-10-02 2004-04-08 Labarge William J. Air cleaner assembly, absorber member, and process for reducing pollutants from being discharged into the atmosphere
US6736871B1 (en) * 2002-12-09 2004-05-18 Visteon Global Technologies, Inc. Integrated filter screen and hydrocarbon adsorber
US7070641B1 (en) * 2003-12-03 2006-07-04 Fleetguard, Inc. Carbon media filter element
US20070107701A1 (en) * 2005-11-17 2007-05-17 Buelow Mark T Hydrocarbon adsorption filter for air intake system evaporative emission control
US20090282793A1 (en) * 2008-05-15 2009-11-19 Ford Global Technologies, Llc Engine hydrocarbon adsorber
US20100316538A1 (en) * 2009-06-11 2010-12-16 Basf Corporation Polymeric Trap with Adsorbent
US20120097680A1 (en) * 2010-10-25 2012-04-26 Briggs & Stratton Corporation Fuel cap
US20170114758A1 (en) * 2015-09-29 2017-04-27 Eagle Actuator Components Gmbh & Co. Kg Positioning an activated carbon filter in an arrangement for its regeneration

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2813864A1 (de) * 1978-03-31 1979-10-11 Dirk Gustav Kronsbein Filter
CA1124594A (en) * 1978-11-30 1982-06-01 Brian W. Green Engine with evaporation control system
DE8019041U1 (de) * 1980-07-16 1981-04-16 Filterwerk Mann & Hummel Gmbh, 7140 Ludwigsburg Ansaugluftfilter von brennkraftmaschinen
JPS5877151A (ja) * 1981-10-31 1983-05-10 Fuji Heavy Ind Ltd 気化器
GB2154894B (en) * 1984-03-03 1987-10-21 Ross Bryan Barrington Filter element
EP0399730B1 (en) * 1989-05-26 1994-09-28 Pall Corporation Sorbent filtration device
DE4001831A1 (de) * 1990-01-23 1991-07-25 Ruiter Ernest De Filtermaterial fuer kraftfahrzeuge
GB2279584A (en) * 1993-07-03 1995-01-11 Kenneth Ian Fitzsimmonds System for obtaining oil-free compressed air
GB2288751A (en) * 1994-04-19 1995-11-01 Philip Arthur Mullins Filter element
DE10102604A1 (de) * 2001-01-20 2002-07-25 Mann & Hummel Filter Ansaugsystem für eine Brennkraftmaschine und Verfahren zum Betreiben des Ansaugsystems

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US2315636A (en) * 1940-03-29 1943-04-06 Henry J De N Mccollum Automobile heater
US3191587A (en) * 1965-06-29 Device for controlling the hydrocar- bon evaporation losses from automo- tive vehicles
US3252270A (en) * 1962-10-01 1966-05-24 Pall Corp Apparatus and method for removal of oil entrained in air
US3452521A (en) * 1967-05-05 1969-07-01 Aloys L Remacle Air filter with supplemental air inlet
US3456635A (en) * 1965-05-03 1969-07-22 Universal Oil Prod Co Means for preventing hydrocarbon losses from an engine carburetor system
US3477210A (en) * 1968-08-12 1969-11-11 Universal Oil Prod Co Hydrocarbon vapor control means for use with engine carburetor
US3496855A (en) * 1968-08-02 1970-02-24 Harry De Boer Augmented automobile heating system
US3505794A (en) * 1968-05-29 1970-04-14 Air Inc Van Air filter
US3518977A (en) * 1968-04-15 1970-07-07 F & E Mfg Co Fuel emission control system
US3540423A (en) * 1969-01-17 1970-11-17 Westvaco Corp Evaporative emission control system
US3563007A (en) * 1968-10-07 1971-02-16 Ford Motor Co Fuel vapor control

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3191587A (en) * 1965-06-29 Device for controlling the hydrocar- bon evaporation losses from automo- tive vehicles
US2315636A (en) * 1940-03-29 1943-04-06 Henry J De N Mccollum Automobile heater
US3252270A (en) * 1962-10-01 1966-05-24 Pall Corp Apparatus and method for removal of oil entrained in air
US3456635A (en) * 1965-05-03 1969-07-22 Universal Oil Prod Co Means for preventing hydrocarbon losses from an engine carburetor system
US3452521A (en) * 1967-05-05 1969-07-01 Aloys L Remacle Air filter with supplemental air inlet
US3518977A (en) * 1968-04-15 1970-07-07 F & E Mfg Co Fuel emission control system
US3505794A (en) * 1968-05-29 1970-04-14 Air Inc Van Air filter
US3496855A (en) * 1968-08-02 1970-02-24 Harry De Boer Augmented automobile heating system
US3477210A (en) * 1968-08-12 1969-11-11 Universal Oil Prod Co Hydrocarbon vapor control means for use with engine carburetor
US3563007A (en) * 1968-10-07 1971-02-16 Ford Motor Co Fuel vapor control
US3540423A (en) * 1969-01-17 1970-11-17 Westvaco Corp Evaporative emission control system

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3877454A (en) * 1971-04-27 1975-04-15 Daimler Benz Ag Air separator
US4139354A (en) * 1977-07-21 1979-02-13 Futurecraft Corporation Filter for the removal of particulate and vaporous mercury
US4259096A (en) * 1978-01-19 1981-03-31 Nippondenso Co., Ltd. Fuel vapor adsorption type air cleaner element for internal combustion engine
US4261717A (en) * 1979-10-15 1981-04-14 Canadian Fram Limited Air cleaner with fuel vapor door in inlet tube
US4386947A (en) * 1980-04-25 1983-06-07 Nippon Soken, Inc. Apparatus for adsorbing fuel vapor
US4322230A (en) * 1980-09-08 1982-03-30 Donaldson Company, Inc. Unitized gas-particulate filter and housing
US4658796A (en) * 1983-03-09 1987-04-21 Aisan Industry Co., Ltd. System for preventing loss of fuel due to evaporation
US4683862A (en) * 1986-04-14 1987-08-04 General Motors Corporation Fuel vapor storage canister
US4714485A (en) * 1986-04-14 1987-12-22 General Motors Corporation Fuel vapor storage canister
US5423903A (en) * 1990-12-03 1995-06-13 Schmitz; Michael Air filter
US5350443A (en) * 1993-04-19 1994-09-27 Bluecher Hasso Von Filter sheet material for passenger cabins in motor vehicles
US6425380B2 (en) * 1998-04-30 2002-07-30 Aisan Kogyo Kabushiki Kaisha Canister for evaporated fuel treatment apparatus
US6581580B2 (en) 2001-01-24 2003-06-24 Ford Global Technologies, Inc. Hydrocarbon vapor evacuation system
US6692555B2 (en) * 2001-03-16 2004-02-17 Toyoda Boshoku Corporation Internal combustion engine air cleaner and adsorption filter
WO2002079633A1 (en) * 2001-03-30 2002-10-10 Honeywell International Inc. Vapor-adsorbent filter for reducing evaporative fuel emissions, and method of using same
US6699310B2 (en) * 2001-12-26 2004-03-02 Toyoda Boshoku Corporation Evaporative fuel adsorbing member and air cleaner
US6692551B2 (en) 2002-07-17 2004-02-17 Delphi Technologies, Inc. Air cleaner assembly and process
US6752859B2 (en) 2002-10-02 2004-06-22 Delphi Technologies, Inc. Air cleaner assembly for reducing pollutants from being discharged into the atmosphere
US20040065197A1 (en) * 2002-10-02 2004-04-08 Labarge William J. Air cleaner assembly, absorber member, and process for reducing pollutants from being discharged into the atmosphere
US6736871B1 (en) * 2002-12-09 2004-05-18 Visteon Global Technologies, Inc. Integrated filter screen and hydrocarbon adsorber
US6692554B1 (en) * 2002-12-10 2004-02-17 Visteon Global Technologies, Inc. Methane storage device
US7070641B1 (en) * 2003-12-03 2006-07-04 Fleetguard, Inc. Carbon media filter element
US20070107701A1 (en) * 2005-11-17 2007-05-17 Buelow Mark T Hydrocarbon adsorption filter for air intake system evaporative emission control
US7578285B2 (en) * 2005-11-17 2009-08-25 Basf Catalysts Llc Hydrocarbon adsorption filter for air intake system evaporative emission control
US20090272361A1 (en) * 2005-11-17 2009-11-05 Basf Catalysts, Llc Hydrocarbon Adsorption Filter for Air Intake System Evaporative Emission Control
US7677226B2 (en) 2005-11-17 2010-03-16 Basf Catalysts Llc Hydrocarbon adsorption filter for air intake system evaporative emission control
US20090282793A1 (en) * 2008-05-15 2009-11-19 Ford Global Technologies, Llc Engine hydrocarbon adsorber
US7918912B2 (en) * 2008-05-15 2011-04-05 Ford Global Technologies, Llc Engine hydrocarbon adsorber
US20100316538A1 (en) * 2009-06-11 2010-12-16 Basf Corporation Polymeric Trap with Adsorbent
US8372477B2 (en) 2009-06-11 2013-02-12 Basf Corporation Polymeric trap with adsorbent
US20120097680A1 (en) * 2010-10-25 2012-04-26 Briggs & Stratton Corporation Fuel cap
US8915234B2 (en) * 2010-10-25 2014-12-23 Briggs & Stratton Corporation Fuel cap
US20170114758A1 (en) * 2015-09-29 2017-04-27 Eagle Actuator Components Gmbh & Co. Kg Positioning an activated carbon filter in an arrangement for its regeneration

Also Published As

Publication number Publication date
GB1275845A (en) 1972-05-24
DE1927046A1 (de) 1970-12-10
FR2046542A5 (OSRAM) 1971-03-05

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