EP3787917A1 - Treibstoffversorgungssystem für eine brennkraftmaschine - Google Patents
Treibstoffversorgungssystem für eine brennkraftmaschineInfo
- Publication number
- EP3787917A1 EP3787917A1 EP19711574.4A EP19711574A EP3787917A1 EP 3787917 A1 EP3787917 A1 EP 3787917A1 EP 19711574 A EP19711574 A EP 19711574A EP 3787917 A1 EP3787917 A1 EP 3787917A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- filter membrane
- supply system
- fuel supply
- fuel
- fuel tank
- 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.)
- Withdrawn
Links
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
- 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
- F02M25/0854—Details of the absorption canister
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/08—Flat membrane modules
- B01D63/087—Single membrane modules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/02—Inorganic material
- B01D71/021—Carbon
- B01D71/0211—Graphene or derivates thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
- B60K15/03—Fuel tanks
- B60K15/035—Fuel tanks characterised by venting means
- B60K15/03504—Fuel tanks characterised by venting means adapted to avoid loss of fuel or fuel vapour, e.g. with vapour recovery systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/702—Hydrocarbons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/30—Cross-linking
Definitions
- the invention relates to a fuel supply system for an internal combustion engine of a motor vehicle with a fuel tank and with a ventilation device for the fuel tank, wherein the ventilation device has a hydrocarbon retention device, in particular according to the preamble of claim 1.
- Such hydrocarbon retention devices are necessary to prevent hydrocarbons, which essentially form the fuel or fuel for the internal combustion engine, from entering the environment.
- a pressure equalization with respect to the environment is necessary because otherwise the fuel is difficult to remove from the tank or the tank can be refilled with fuel.
- the thermal expansions caused by temperature fluctuations are also compensated with the aid of the ventilation device.
- activated carbon filters which constitute the hydrocarbon retention device. These activated carbon filters adsorb the hydrocarbons. If, during pressure equalization, ie gas leakage from the fuel tank into the environment, this gas is passed through the activated carbon filter, the hydrocarbons are adsorbed in the activated carbon so that they do not escape into the environment.
- the object of the invention is to provide an improved or at least other embodiment of a fuel supply system, which is characterized in particular by a simpler hydrocarbon retention device.
- the invention is based on the basic idea of replacing the technically complex activated carbon filters with a simple membrane system in order to form the hydrocarbon recovery device.
- the ventilation device has a ventilation path, via which a gas exchange between the fuel tank and an environment is possible.
- the hydrocarbon retention device has at least one filter membrane which can separate hydrocarbons from air. This filter membrane makes it possible to selectively retain the hydrocarbons, while air, in particular oxygen, nitrogen and CO 2 , can escape from the fuel tank into the environment and vice versa, thus making it possible to equalize the pressure.
- the filter membrane is arranged in the ventilation path of the fuel tank such that the ventilation path is covered by the filter membrane, thereby preventing hydrocarbons from the fuel tank from passing through the ventilation path get into the environment.
- the filter membrane blocks the way between Tank contents and environment for hydrocarbons, while the components of air can pass through the membrane. In this way, a very simple, space-optimized and effective hydrocarbon retention device is made possible. Especially a small-scale hydrocarbon retention device provides great advantages.
- hydrocarbon retainer One convenient way is for the hydrocarbon retainer to have only filter membranes to separate the hydrocarbons from air. This is to mean, in particular, that the hydrocarbon retention device has no activated carbon filters or other adsorbent materials. This means that only by using such a filter membrane, the hydrocarbon retention devices can be realized, which allows a very simple and inexpensive construction.
- At least one filter membrane has graphene.
- Such graphene-containing membranes can be made very thin due to the high stability of graphene. Furthermore, these can be provided with defined pore sizes, which allow the selection between the air components and the hydrocarbons of the fuel.
- At least one filter membrane comprises carbon nanotubes. These carbon nanotubes, in particular due to the fibrous structure of the carbon nanotubes and the extremely high strength of the carbon nanotubes, make it possible to reinforce the membrane so that it can be made particularly thin, so that the gas throughput of air constituents through the membrane is very high, and thus only small Membrane surface is needed.
- a further advantageous possibility provides that at least one Filtermemb- ran hydrophilized, highly crosslinked solvent-stable polymeric membranes. Such membranes are on the one hand chemically resistant to the fuel, so that they are not attacked. On the other hand, due to hydrophilization, they are highly repellent to non-polar molecules, as is common in fuels. As a result, such filter membranes have a high selectivity.
- a favorable variant provides that the filter membrane has pores which have a defined pore size, which enables fuel molecules to be retained and air molecules to be able to pass the membrane through the pores of the membrane. This makes it possible to produce filter membranes which have a very high selectivity between the hydrocarbons and the air constituents. In addition, such membranes have a very high retention potential for the hydrocarbons.
- air molecules are understood to mean in particular molecules which are typically contained in the air, in particular oxygen, nitrogen and carbon dioxide.
- other air constituents are argon, which, because of the atomic gaseous form, is smaller than C0 2 molecules and therefore likewise can easily pass through the membrane.
- the at least one filter membrane is a gas permeation membrane with high selective permeability.
- Such membranes have substance-dependent solubilities and diffusion coefficients, so that the permeation can vary depending on the substance.
- such membranes can be designed in such a way that hydrocarbons have a very low permeability, while small molecules, such as occur, for example, in the air, ie oxygen, nitrogen and C0 2 have a high permeability.
- a selective retention of the hydrocarbons can also be made possible with the aid of such a filter membrane.
- such gas permeation membranes may have high permeability to hydrocarbons and low permeability to the air constituents so that the separation of air and fuel is effected by the retention of the air constituents.
- a flow generating device which drives a gas mixture which is located in the fuel tank, so that the gas mixture flows at least in sections along the filter membrane.
- a so-called crossflow filter method is given.
- the flow of the gas along the membrane allows a constant concentration on the inside of the membrane, so that an effective exchange of the air components is possible.
- this avoids that the concentration of air relative to the hydrocarbon vapors on the membrane at which the air molecules can diffuse through the membrane would change and thus influence the filter properties of the filter membrane.
- Fig. 1 is a schematic representation of a first embodiment of a
- FIG. 2 shows a schematic diagram of a second embodiment of a fuel supply system
- Fig. 3 is a schematic diagram of a hydrocarbon retainer of the
- FIG. 4 is a schematic diagram of a hydrocarbon retainer of a fuel supply system according to a third embodiment.
- a first embodiment of a fuel supply system 10 for an internal combustion engine 12 shown in FIG. 1 can be used, for example, in a motor vehicle that is driven by this internal combustion engine 12 to provide fuel for the internal combustion engine.
- the fuel supply system has a fuel tank 14, in which the fuel for the internal combustion engine 12 can be stored. Furthermore, at least one fuel line 16 is provided, via which fuel can be conducted to the internal combustion engine 12.
- a ventilation device 18 is provided with which gas, in particular air 25 between the environment 20 and an interior 22 of the fuel tank 14 can be exchanged. By means of the ventilation device 18, a pressure compensation in the interior 22 of the fuel tank 14 can take place, so that fuel can be removed from the tank via the fuel line 16 without problems. Likewise, this facilitates the filling of the fuel tank 14.
- a hydrocarbon retention device 24 is provided, which is arranged in a ventilation path 26 of the ventilation device 18.
- the hydrocarbon retention device 24 in this case has a filter membrane 28 which is arranged such that it completely closes off the ventilation path 26.
- the filter membrane 28 is designed in such a way that it selectively retains hydrocarbons 23, that is to say that hydrocarbons 23 can not pass through the filter membrane 28 or only pass through very badly, so that no hydrocarbons 23 pass into the ventilation path 26 via the ventilation path 26 Environment 20 can reach.
- Such filter membranes 28 may, for example, have a plurality of pores which, due to the pore size, allow selection between large and small molecules. By selecting the pore size, a selection can thus be made between the hydrocarbons 23 present in the fuel and the molecules and atoms which are typically present in the air 25.
- the main constituents of the air are oxygen, Nitrogen and carbon dioxide small compared to the hydrocarbon chains 23, which are commonly present in gasoline or diesel.
- such membranes for the filter membrane 28 may have graphene, which allows a particularly high stability of the filter membrane 28.
- the pore size or particularly stable pores can be generated in a targeted manner.
- the filter membrane 28 can have carbon nanotubes. These carbon nanotubes can also increase the stability of the filter membrane 28 so that it can be made thinner overall. As a result, the gas exchange for the air particles 25 can be increased while the retention capacity for the hydrocarbons 23 remains the same. As a result, in particular the area of the filter membrane 28 can be reduced.
- the filter membrane 28 may comprise hydrophilized, strongly crosslinked, solvent-stable polymers. Such polymers also have a high selectivity and retention capacity for the hydrocarbons 23.
- the filter membrane 28 is a gas permeation membrane with high selective permeability. That is, the permeability for, in particular, the air constituents 25 such as oxygen, nitrogen and CO 2 is much higher than the permeability of the hydrocarbons 23 of the fuel. This can be achieved, for example, by a different solubility and different diffusion coefficients for the air constituents 25 and / or the hydrocarbons 23.
- a second embodiment of the fuel supply system 10 shown in FIG. 2 differs from the first embodiment shown in FIG of the fuel supply system in that a Strömungser Wegungsein- device 30 is provided which drives the gas mixture, which is located in the interior 22 of the fuel tank 14, such that the gas mixture at least partially flows along the filter membrane 28.
- concentration shifts at the filter membrane 28 can be prevented, so that a permanent, constant filter action or retention effect for the hydrocarbons 23 is given.
- a flow channel 32 may be provided, in which the flow generation device 30 introduces the gas mixture from the interior 22 of the fuel tank 14.
- the filter membrane 28 may cover an opening 34 between the flow channel 32 and the ventilation path 26.
- the filter membrane 28 can be wound up in a cylindrical manner, so that a large filter surface is available. As a result, the gas mixture is fed along the flow channel on the filter membrane 28, so that the "crossflow method" is made possible.
- the flow generating device 30 may be formed by sucking fresh air 25 from the environment via the filter membrane 28 to the engine when starting the engine, and thus using the hydrocarbons 23 collected in the flow channel 32 for the combustion.
- the second embodiment of the fuel supply system 10 illustrated in FIG. 2 coincides with the first embodiment of the fuel supply system 10 shown in FIG. 1 with regard to construction and function, to the above description of which reference is made in this respect.
- a third embodiment of the fuel supply system shown in FIG. 4 differs from the second embodiment of the fuel supply system 10 shown in FIGS. 2 and 3 in that the filter membrane 28 is designed such that the filter membrane 28 is permeable to hydrocarbons 23 but the air components 25 largely retains. This also allows a separation of the hydrocarbons 23 from the air constituents 25 to be achieved.
- the third embodiment of the fuel supply system shown in FIG. 4 coincides with the second embodiment of the fuel supply system 10 shown in FIGS. 2 and 3 with regard to construction and function, to the above description of which reference is made.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018206970.0A DE102018206970A1 (de) | 2018-05-04 | 2018-05-04 | Treibstoffversorgungssystem für eine Brennkraftmaschine |
| PCT/EP2019/056470 WO2019211033A1 (de) | 2018-05-04 | 2019-03-14 | Treibstoffversorgungssystem für eine brennkraftmaschine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3787917A1 true EP3787917A1 (de) | 2021-03-10 |
Family
ID=65812315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19711574.4A Withdrawn EP3787917A1 (de) | 2018-05-04 | 2019-03-14 | Treibstoffversorgungssystem für eine brennkraftmaschine |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20210246851A1 (de) |
| EP (1) | EP3787917A1 (de) |
| CN (1) | CN112166047A (de) |
| DE (1) | DE102018206970A1 (de) |
| WO (1) | WO2019211033A1 (de) |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8702074U1 (de) * | 1987-02-11 | 1987-04-30 | Schwefer, Hans Jürgen, Dipl.-Ing., 5100 Aachen | Einrichtung an einem Fahrzeug mit einem nachtankbaren Behälter für kohlenwasserstoffhaltige Fluide |
| JP3158698B2 (ja) * | 1992-08-28 | 2001-04-23 | トヨタ自動車株式会社 | 蒸発燃料排出抑止装置 |
| WO1995003949A1 (en) * | 1993-07-27 | 1995-02-09 | E.I. Du Pont De Nemours And Company | Membrane closure device |
| DE102004013173B4 (de) * | 2004-03-17 | 2006-04-13 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Oleophobe anorganische Membranen und Verfahren zu deren Herstellung |
| DE602007007301D1 (de) * | 2006-01-20 | 2010-08-05 | Bemis Mfg Co | Verfahren zur Montage eines modularen Sperrklinkenverschlusses |
| US20080308072A1 (en) * | 2007-06-13 | 2008-12-18 | Raja Banerjee | Hydrocarbon separation from air using membrane separators in recirculation tube |
| US20080308074A1 (en) * | 2007-06-13 | 2008-12-18 | Allen Christopher D | Evaporative emissions canister with external membrane |
| CN101450288B (zh) * | 2007-11-30 | 2012-08-29 | 清华大学 | 过滤膜及其制备方法 |
| US20100024898A1 (en) * | 2008-07-29 | 2010-02-04 | General Electric Company | Fuel tank vent including a membrane separator |
| US8388743B2 (en) * | 2008-10-30 | 2013-03-05 | Aisan Kogyo Kabyshiki Kaisha | Separation membrane module and fuel vapor processing apparatus incorporating the same |
| DE102009047795A1 (de) * | 2009-09-30 | 2011-03-31 | Siemens Aktiengesellschaft | Vorrichtung und Verfahren zur Auftrennung von Gasen sowie Verwendung dazu |
| JP5378180B2 (ja) * | 2009-12-02 | 2013-12-25 | 愛三工業株式会社 | 分離膜モジュールとこれを備える蒸発燃料処理装置 |
| US9381449B2 (en) * | 2013-06-06 | 2016-07-05 | Idex Health & Science Llc | Carbon nanotube composite membrane |
| US20180185814A1 (en) * | 2015-05-06 | 2018-07-05 | The Regents Of The University Of California | Nanostructured composites for gas separation and storage |
| US10307708B2 (en) * | 2016-06-24 | 2019-06-04 | Hamilton Sundstrand Corporation | Fuel tank system and method |
-
2018
- 2018-05-04 DE DE102018206970.0A patent/DE102018206970A1/de not_active Withdrawn
-
2019
- 2019-03-14 US US17/052,797 patent/US20210246851A1/en not_active Abandoned
- 2019-03-14 EP EP19711574.4A patent/EP3787917A1/de not_active Withdrawn
- 2019-03-14 WO PCT/EP2019/056470 patent/WO2019211033A1/de not_active Ceased
- 2019-03-14 CN CN201980033255.9A patent/CN112166047A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN112166047A (zh) | 2021-01-01 |
| DE102018206970A1 (de) | 2019-11-07 |
| WO2019211033A1 (de) | 2019-11-07 |
| US20210246851A1 (en) | 2021-08-12 |
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| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: PREISSINGER, MARKUS Inventor name: STRENG, SIMON Inventor name: EHLERT, THOMAS Inventor name: HEIN, MARTIN |
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