DE4119272A1 - Hydrocarbon emission filter system vehicle fuel tanks - has additional filler contg. active carbon@, porous polymer etc. for reducing desorbed hydrocarbon concn. peak - Google Patents

Hydrocarbon emission filter system vehicle fuel tanks - has additional filler contg. active carbon@, porous polymer etc. for reducing desorbed hydrocarbon concn. peak

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Publication number
DE4119272A1
DE4119272A1 DE19914119272 DE4119272A DE4119272A1 DE 4119272 A1 DE4119272 A1 DE 4119272A1 DE 19914119272 DE19914119272 DE 19914119272 DE 4119272 A DE4119272 A DE 4119272A DE 4119272 A1 DE4119272 A1 DE 4119272A1
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Prior art keywords
filter
hydrocarbon
filter system
concn
desorbed
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DE19914119272
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German (de)
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Hasso Von Bluecher
Ernest De Dr Ruiter
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28026—Particles within, immobilised, dispersed, entrapped in or on a matrix, e.g. a resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
    • B01J20/28004—Sorbent size or size distribution, e.g. particle size
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28016—Particle form
    • B01J20/28019—Spherical, ellipsoidal or cylindrical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28042—Shaped bodies; Monolithic structures
    • B01J20/28045—Honeycomb or cellular structures; Solid foams or sponges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J20/28078—Pore diameter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28054—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J20/28095—Shape or type of pores, voids, channels, ducts
    • B01J20/28097—Shape or type of pores, voids, channels, ducts being coated, filled or plugged with specific compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
    • B01J20/3214—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the method for obtaining this coating or impregnating
    • B01J20/3223—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the method for obtaining this coating or impregnating by means of an adhesive agent
    • 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

Abstract

In a filter system for preventing hydrocarbon emission from vehcicles with OTTO engines, having an adsorption filter (F1) which, during travel, is desorbed in counter-current by the engine intake air, the novelty is that the hydrocarbon concn. peak, occurring on desorption, is reduced by a succeeding adsorption filter (F2). The adsorbent may be active carbon, a porous polymer (esp. based styrene/divinyl benzene) or a hydrophobic zeolite and may be adhesively bonded pref. to a reticulated coarsely porous polyurethane foam matrix. USE/ADVANTAGE - Used to prevent emissions from carburettors and fuel tanks. The additonal adsorption filter provide smoothing of the desorbed hydrocarbon concn., esp. when large (4-5l) filter canisters are used.

Description

Kohlenwasserstoffe selbst sind in den in der Luft vorkommenden Mengen zwar kaum gefährlich, aber sie bilden unter Einfluß von Licht und Sauerstoff Peroxidver­ bindungen, die wiederum zur Bildung von weit schädlicheren Stoffen führen (Ozon, Stickoxiden, Schwefelsäureanhydrid usw.).Hydrocarbons themselves are in the amounts occurring in the air hardly dangerous, but they form peroxide ver under the influence of light and oxygen bonds, which in turn lead to the formation of far more harmful substances (ozone, Nitrogen oxides, sulfuric anhydride, etc.).

Da etwa 0,5-2% der in OTTO-Motoren verwendeten Kraftstoffe an diversen Stel­ len des Fahrzeuges an die Atmosphäre abgegeben werden, ist es verständlich, daß man sich Gedanken machte, diese Emission möglichst vollständig zu vermei­ den, und zwar insbesondere im Hinblick auf die noch immer zunehmende Anzahl von Kraftfahrzeugen.Since about 0.5-2% of the fuels used in OTTO engines are in various places If the vehicle is released into the atmosphere, it is understandable that one thought about avoiding this emission as completely as possible the, especially with regard to the still increasing number of motor vehicles.

Grundsätzlich treten an folgenden Stellen Kohlenwasserstoff-Emissionen auf:Basically, hydrocarbon emissions occur at the following points:

  • - am Vergaser, insbesondere nach dem Abstellen des warmen Motors,- on the carburetor, especially after switching off the warm engine,
  • - am Tank, zufolge von Temperaturschwankungen (Tag/Nacht),- on the tank due to temperature fluctuations (day / night),
  • - am Tank beim Betanken.- on the tank when refueling.

In den USA machte man sich ab 1970 ernsthaft Gedanken. Wege zu finden, um die Kohlenwasserstoff-Emission möglichst zu reduzieren. Eine Übersicht der einschlä­ gigen Literatur befindet sich Ende der Beschreibung. Für die beiden erstgenannten Emissionen wurde ein Kanister entwickelt, der ca. 1 l Aktivkohlegranulat enthält. Hierin werden die austretenden Benzindämpfe adsorbiert. Beim Fahren wird Frischluft vom Motor im Gegenstrom durch den Filter angesaugt, und die dabei de­ sorbierten Kohlenwasserstoffe werden im Motor verbrannt. Eine wesentlich schwe­ rer in den Griff zu bekommende Emission tritt beim Betanken auf. Hierbei können innerhalb einer Minute bis zu 100 g Kohlenwasserstoffe - hauptsächlich Butan und Pentan - aus dem Tank verdrängt werden. Es wird zur Zeit versucht, diese relativ großen Mengen in einem "großen Kohlekanister" - man denkt etwa an 5 l Inhalt - zu adsorbieren und während des Fahrens in der bereits beschriebenen Art dem Motor zuzuführen. In the United States, serious concerns were raised from 1970 onwards. Finding ways to do that To reduce hydrocarbon emissions as much as possible. An overview of the incl existing literature is at the end of the description. For the first two Emissions, a canister was developed that contains approx. 1 l of granular activated carbon. The escaping gasoline vapors are adsorbed here. When driving Fresh air drawn in by the engine in counterflow through the filter, and the de sorbed hydrocarbons are burned in the engine. A much heavier The emission that can be controlled occurs during refueling. Here you can up to 100 g of hydrocarbons - mainly butane and Pentane - to be displaced from the tank. It is currently trying to be relative large quantities in a "big coal canister" - one thinks about 5 l content - too adsorb and while driving in the manner already described Feed the motor.  

Bei der Verwendung des 1 l-Kohlekanisters treten eine Reihe von Problemen auf, wie z. B. Blockieren der Adsorptions-Poren durch höher siedende Bestandteile bzw. durch Feuchtigkeit, die mit der Zeit die Wirksamkeit des Filters stark beein­ trächtigen. Diese können der Literaturübersicht entnommen werden und werden an dieser Stelle nicht weiter diskutiert.There are a number of problems with using the 1 liter coal canister, such as B. Blocking the adsorption pores by higher boiling components or due to moisture, which strongly affects the effectiveness of the filter over time pregnant. These can be found in the literature overview and are available at not discussed further here.

Insbesondere bei Versuchen mit dem 5 l-Kanister (der auch die beim Betanken auf­ tretende Emission vermeiden soll) trat ein neues Problem auf, welches noch nicht gelöst werden konnte und welches grundsätzlich bei jedem mit Aktivkohle arbeiten­ den System, bei dem im Gegenstrom desorbiert wird, auftritt.Especially in experiments with the 5 l canister (which also applies when refueling should avoid emerging emissions), a new problem occurred, which is not yet could be solved and which basically work with activated carbon for everyone the system in which is desorbed in countercurrent occurs.

Es ist Ziel der vorliegenden Erfindung, für dieses Problem eine Lösung zu anzu­ bieten. Das Problem ist folgendes:The aim of the present invention is to find a solution to this problem Offer. The problem is this:

Die Desorption des mit Kohlenwasserstoffen beladenen Kohlekanisters erfolgt nicht gleichmäßig, sondern in Form einer sehr ausgeprägten Spitze zu Beginn des Desorptionszyklus, sehr schnell gefolgt von einem starken Abfall der desorbierten Menge Kohlenwasserstoffe. Das Phänomen ist leicht zu erklären: Am Eingang des Filters ist die Aktivkohle gesättigt. Wird im Gegenstrom desorbiert, wird dort relativ viel Kraftstoff freigesetzt, der ohne jede Verzögerung zum Motor gelangt. Bei den bisherigen Versuchen mit kleinen Kohlekanistern, die nur relativ geringe Mengen Kraftstoff speichern und wieder abgeben konnten, schien das Auftreten der be­ schriebenen Konzentrationsspitze nicht sehr schwerwiegend. Der Trend geht aber zu 4-5 l großen Kanistern, wo in kurzer Zeit 100 g Kohlenwasserstoffe und mehr desorbiert werden können. Das führt zu einer nicht mehr vertretbaren Anreicherung des Kraftstoff-Luft-Gemischs, welche nicht nur zu schlechten Laufeigenschaften, sondern auch zu einer Funktionsstörung des Katalysators führt. Rein theoretisch könnte man die für die Desorption des Filters benötigte Luft über die Lambdasonde steuern, was aber relativ kompliziert ist. Wesentlich einfacher ist die erfindungs­ gemäße Problemlösung. Bei dieser wird der vom Hauptfilter desorbierte Kraftstoff über einen kleinen, noch unbeladenen Adsorptionsfilter mit geringem Rückhalte­ vermögen geführt, der eine Verzögerung - und somit Glättung der Konzentrations­ spitze - bewirkt.The desorption of the coal canister loaded with hydrocarbons takes place not evenly, but in the form of a very pronounced tip at the beginning of the Desorption cycle, followed very quickly by a sharp drop in the desorbed Amount of hydrocarbons. The phenomenon is easy to explain: At the entrance of the Filters, the activated carbon is saturated. If desorbed in countercurrent, it becomes relative there released a lot of fuel, which reaches the engine without any delay. Both previous attempts with small coal canisters that only have relatively small quantities Be able to store fuel and dispense it again, the appearance of the be written concentration peak not very serious. But the trend is going to 4-5 l canisters, where in a short time 100 g hydrocarbons and more can be desorbed. This leads to an unacceptable enrichment the fuel-air mixture, which not only leads to poor running properties, but also leads to a malfunction of the catalyst. Just theoretically you could use the air required for the desorption of the filter via the lambda sensor control, which is relatively complicated. Invention is much simpler appropriate problem solving. This is the fuel desorbed by the main filter via a small, still unloaded adsorption filter with low retention assets led to a delay - and thus smoothing the concentration tip - causes.

Fig. 1 zeigt das Prinzip der klassischen Ausführung des Filtersystems. Beim Be­ tanken und bei stillstehendem Motor ist das Ventil V1 offen und V2 ge­ schlossen. Die mit Kohlenwasserstoffen gesättigte Luft, die z. B. beim Be­ tanken verdrängt wird, gelangt durch die Rohrleitung R1 über den Adsorptionsfilter F1 ins Freie. Bei der Desorption ist V1 geschlossen und V2 offen. Dabei wird vom Motor durch die Leitung R2 Frischluft durch den Filter gesaugt, welche die dort adsorbierten Kohlenwasserstoffe aufnimmt, um sie dem Motor zuzuführen. Fig. 1 shows the principle of the classic design of the filter system. When filling up and with the engine stopped, valve V 1 is open and V 2 is closed. The air saturated with hydrocarbons, the z. B. is displaced during loading, passes through the pipe R 1 via the adsorption filter F 1 into the open. During desorption, V 1 is closed and V 2 is open. Fresh air is sucked through the filter through the line R 2 through the filter, which absorbs the hydrocarbons adsorbed there in order to supply them to the engine.

Fig. 2 zeigt ein typisches Konzentrationsprofil in Funktion der Zeit. FIG. 2 shows a typical concentration profile in function of time.

Fig. 3 zeigt die erfindungsgemäße Anordnung mit einem zusätzlichen Adsorp­ tionsfilter F2, welcher nicht nur wesentlich kleiner als F1 ist, sondern auch bevorzugterweise mit Adsorbentien mit geringerer Affinität zu Kohlenwas­ serstoffen ausgestattet ist. Fig. 3 shows the arrangement according to the invention with an additional Adsorp tion filter F 2 , which is not only significantly smaller than F 1 , but is also preferably equipped with adsorbents with a lower affinity for hydrocarbons.

Fig. 4 zeigt, wie dadurch die ungünstige Kohlenwasserstoff-Spitzenkonzentration der Fig. 2 abgebaut wird. Die Kapazität des Zusatzfilters ist so gestaltet, daß es praktisch sofort zu einem teilweisen Durchbruch kommt. Als für die Er­ findung gut geeignet erwiesen sich, neben großporiger Aktivkohle, "poröse Polymere", die oft auf Styrol/Divinylbenzol-Basis aufgebaut sind, sowie hydrophobe Molekularsiebe. Dabei werden solche mit großen Mikroporen, beispielsweise <10 Å, insbesondere <20 Å, bevorzugt. Solche Adsorben­ tien sind dem Fachmann bekannt. Grundsätzlich eignet sich jede Filterform, z. B. auch die heute verwendeten Schüttfilter. Wegen einer Reihe von Vorteilen wird jedoch eine Anordnung, wie sie in der Deutschen Offen­ legungsschrift DE 38 13 563 A1 beschrieben ist, bevorzugt. Dabei sind (meist kugelförmige) Adsorberteilchen mit ⌀ 0,3-1,0 mm an einer dreidi­ mensionalen Trägermatrix, z. B. an den Stegen eines großporigen, retiku­ lierten PU-Schaumes mit Hilfe einer Haftmasse, fixiert. FIG. 4 shows how the unfavorable hydrocarbon peak concentration of FIG. 2 is reduced as a result. The capacity of the additional filter is designed so that a partial breakthrough occurs almost immediately. In addition to large-pore activated carbon, "porous polymers", which are often based on styrene / divinylbenzene, and hydrophobic molecular sieves have proven to be well suited for the invention. Those with large micropores, for example <10 Å, in particular <20 Å, are preferred. Such adsorbents are known to the person skilled in the art. In principle, any filter shape is suitable, e.g. B. also the bulk filters used today. Because of a number of advantages, however, an arrangement as described in German Offenlegungsschrift DE 38 13 563 A1 is preferred. Here are (usually spherical) adsorber particles with ⌀ 0.3-1.0 mm on a three-dimensional support matrix, for. B. fixed to the webs of a large-pored, reticulated PU foam with the help of an adhesive.

Die Desorption des Zusatzfilters F2 erfolgt nach der Desorption des Haupt­ filters F1.The desorption of the additional filter F 2 takes place after the desorption of the main filter F 1 .

Claims (7)

1. Filtersystem zur Vermeidung der Kraftstoffemission von Kraftfahrzeugen mit OTTO-Motoren auf Basis eines Adsorptionsfilters, der beim Fahren durch vom Motor angesaugte Frischluft im Gegenstrom wieder desorbiert wird, dadurch gekennzeichnet, daß die bei der Desorption auftretende Kohlenwasserstoff- Konzentrationsspitze durch einen nachgeschalteten Adsorptionsfilter abgebaut wird.1. Filter system to avoid fuel emissions from motor vehicles with OTTO engines based on an adsorption filter, which is desorbed again in countercurrent when driving by fresh air drawn in by the engine, characterized in that the hydrocarbon concentration peak occurring during the desorption is reduced by a downstream adsorption filter . 2. Filter nach Anspruch 1, dadurch gekennzeichnet, daß die körnigen oder kugel­ förmigen Adsorbentien eine Teilchengröße von ca. 0,3-1,0 mm aufweisen und mit einer Haftmasse an einer dreidimensionalen Matrix, vorzugsweise ein reti­ kulierter großporiger PU-Schaum, fixiert sind.2. Filter according to claim 1, characterized in that the granular or spherical shaped adsorbents have a particle size of about 0.3-1.0 mm and with an adhesive on a three-dimensional matrix, preferably a reti cultivated large-pored PU foam, are fixed. 3. Filtersystem nach Anspruch 1 und/oder 2 dadurch gekennzeichnet, daß das Adsorbens Aktivkohle ist.3. Filter system according to claim 1 and / or 2, characterized in that the Adsorbent is activated carbon. 4. Filtersystem nach einem oder mehreren der vorhergehenden Ansprüche da­ durch gekennzeichnet, daß das Adsorbens poröse Polymere, bevorzugter­ weise auf Basis Styrol/Divinylbenzol, sind.4. Filter system according to one or more of the preceding claims characterized in that the adsorbent porous polymers, more preferred as based on styrene / divinylbenzene. 5. Filtersystem nach einem oder mehreren der vorhergehenden Ansprüche da­ durch gekennzeichnet, daß das Adsorbens ein hydrophober Zeolith ist.5. Filter system according to one or more of the preceding claims characterized in that the adsorbent is a hydrophobic zeolite. 6. Filtersystem nach einem oder mehreren der vorhergehenden Ansprüche da­ durch gekennzeichnet, daß die Mikroporen der Adsorber verhältnismäßig groß sind und sich im Bereich von 10-100 Å bewegen.6. Filter system according to one or more of the preceding claims characterized in that the micropores of the adsorbers are relatively large and are in the range of 10-100 Å. 7. Filtersystem nach einem oder mehreren der vorhergehenden Ansprüche da­ durch gekennzeichnet, daß der zusätzliche Filter im Vergleich zum Hauptfilter eine 3-10 mal kleinere Kapazität besitzt.7. Filter system according to one or more of the preceding claims characterized in that the additional filter compared to the main filter has a capacity 3-10 times smaller.
DE19914119272 1991-06-12 1991-06-12 Hydrocarbon emission filter system vehicle fuel tanks - has additional filler contg. active carbon@, porous polymer etc. for reducing desorbed hydrocarbon concn. peak Ceased DE4119272A1 (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4331586A1 (en) * 1993-09-17 1995-03-23 Hasso Von Bluecher Agglomerates made of drains having specific properties
DE4343359A1 (en) * 1993-12-18 1995-06-22 Hasso Von Bluecher Automobile fresh air filter
EP1359313A2 (en) * 2002-04-15 2003-11-05 Ford Global Technologies, LLC An air intake system for an internal combustion engine
DE102004054677A1 (en) * 2004-11-12 2006-05-18 Bayerische Motoren Werke Ag Ventilation system for fuel tank of motor vehicle, has reactor provided downstream to adsorption filter and restraining odorants of hydrocarbons in case of breakout of filter, where reactor has silicate substrate doped with platinum
EP2135996A1 (en) * 2008-06-19 2009-12-23 MAHLE International GmbH Carbon-enriched material
DE102012110063A1 (en) * 2012-10-22 2014-04-24 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Filter arrangement for a tank ventilation of a fuel tank
CN113775439A (en) * 2021-08-30 2021-12-10 东风汽车集团股份有限公司 Method and system for detecting flow of low-load desorption pipeline of active intervention type evaporation system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1100660B (en) * 1957-09-05 1961-03-02 Linde S Eismaschinen Ag Zweign Device for pre-cleaning a gas mixture intended for decomposition by compression and deep freezing
SU953247A1 (en) * 1977-09-06 1982-08-23 Научно-Исследовательская И Конструкторско-Технологическая Лаборатория Токсичности Двигателей Apparatus for trapping fuel vapour in i.c. engine fuel feed system
DE3813563A1 (en) * 1988-04-22 1989-11-02 Hasso Von Bluecher Adsorption filter with high air permeability
DE3935506A1 (en) * 1989-10-25 1991-05-02 Ifg Ingenieur Und Forschungsge Removing hydrocarbon(s) from condensate water obtd. in dry cleaning - by liq.-liq. extn. followed by adsorption

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1100660B (en) * 1957-09-05 1961-03-02 Linde S Eismaschinen Ag Zweign Device for pre-cleaning a gas mixture intended for decomposition by compression and deep freezing
SU953247A1 (en) * 1977-09-06 1982-08-23 Научно-Исследовательская И Конструкторско-Технологическая Лаборатория Токсичности Двигателей Apparatus for trapping fuel vapour in i.c. engine fuel feed system
DE3813563A1 (en) * 1988-04-22 1989-11-02 Hasso Von Bluecher Adsorption filter with high air permeability
DE3935506A1 (en) * 1989-10-25 1991-05-02 Ifg Ingenieur Und Forschungsge Removing hydrocarbon(s) from condensate water obtd. in dry cleaning - by liq.-liq. extn. followed by adsorption

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4331586A1 (en) * 1993-09-17 1995-03-23 Hasso Von Bluecher Agglomerates made of drains having specific properties
DE4331586C2 (en) * 1993-09-17 1998-09-03 Hasso Von Bluecher Activated carbon agglomerates
DE4343359A1 (en) * 1993-12-18 1995-06-22 Hasso Von Bluecher Automobile fresh air filter
EP1359313A2 (en) * 2002-04-15 2003-11-05 Ford Global Technologies, LLC An air intake system for an internal combustion engine
EP1359313A3 (en) * 2002-04-15 2004-06-16 Ford Global Technologies, LLC An air intake system for an internal combustion engine
US7458366B2 (en) 2002-04-15 2008-12-02 Ford Global Technologies, Llc Fugitive hydrocarbon treatment module for internal combustion engine air intake system
DE102004054677A1 (en) * 2004-11-12 2006-05-18 Bayerische Motoren Werke Ag Ventilation system for fuel tank of motor vehicle, has reactor provided downstream to adsorption filter and restraining odorants of hydrocarbons in case of breakout of filter, where reactor has silicate substrate doped with platinum
EP2135996A1 (en) * 2008-06-19 2009-12-23 MAHLE International GmbH Carbon-enriched material
DE102012110063A1 (en) * 2012-10-22 2014-04-24 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Filter arrangement for a tank ventilation of a fuel tank
CN113775439A (en) * 2021-08-30 2021-12-10 东风汽车集团股份有限公司 Method and system for detecting flow of low-load desorption pipeline of active intervention type evaporation system
CN113775439B (en) * 2021-08-30 2022-09-09 东风汽车集团股份有限公司 Method and system for detecting flow of low-load desorption pipeline of active intervention type evaporation system

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