EP0865571A1 - Adsorption filter for the fuel tank venting system of an internal combustion engine and process for operating said system - Google Patents

Adsorption filter for the fuel tank venting system of an internal combustion engine and process for operating said system

Info

Publication number
EP0865571A1
EP0865571A1 EP97926982A EP97926982A EP0865571A1 EP 0865571 A1 EP0865571 A1 EP 0865571A1 EP 97926982 A EP97926982 A EP 97926982A EP 97926982 A EP97926982 A EP 97926982A EP 0865571 A1 EP0865571 A1 EP 0865571A1
Authority
EP
European Patent Office
Prior art keywords
adsorption filter
housing
fuel tank
filter
adsorption
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.)
Granted
Application number
EP97926982A
Other languages
German (de)
French (fr)
Other versions
EP0865571B1 (en
Inventor
Matthias Bohl
Harald Haufe
Klaus Schweikert
Kay Brodesser
Uwe Mohr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Knecht Filterwerk GmbH
Original Assignee
Knecht Filterwerk GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE1996123740 external-priority patent/DE19623740A1/en
Application filed by Knecht Filterwerk GmbH filed Critical Knecht Filterwerk GmbH
Publication of EP0865571A1 publication Critical patent/EP0865571A1/en
Application granted granted Critical
Publication of EP0865571B1 publication Critical patent/EP0865571B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F02M25/0809—Judging failure of purge control system
    • F02M25/0818—Judging failure of purge control system having means for pressurising the evaporative emission space
    • 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

Definitions

  • the invention relates to an adsorption filter of a fuel tank ventilation system of an internal combustion engine according to the preamble of claim 1 and a method for operating this system.
  • the filter as such is known for example from DE 41 24 465 .-. 1.
  • the invention is concerned with the construction of such a filter with the problem of designing the individual units of the fuel tank ventilation system as a compact, rationally manageable and easy to assemble module part on the tank and the intake air line of the internal combustion engine.
  • the problem with which the invention is concerned also includes ensuring that the adsorption material is safely regenerated in engines in which there is no sufficient negative pressure - for whatever reason - in the intake air line during engine operation most.
  • the teaching of claim 6 ensures that the suction line of the internal combustion engine is pumped through m through which Air carried by adsorption filter does not adversely affect the engine combustion process.
  • a larger and a smaller chamber for receiving activated carbon are formed as adsorbents for fuel vapors of an unillustrated tank of an internal combustion engine by a partition 2.
  • the smaller chamber is designated 3 and the larger chamber 4.
  • the two chambers 3 and 4 are closed vertically at the top and bottom with permeable covers 5 and 6, a distance from an adjacent wall of the filter housing 1 being provided on the sides of the covers 5 and 6 facing away from the covered activated carbon in order to form a flow channel is.
  • This flow space between the smaller and the larger chamber 3 or 4 is separated perpendicularly below by the intermediate wall 2.
  • the flow channel lying vertically above the upper cover 6 is formed by an intermediate wall 7 of the filter housing 1.
  • An additional separate flow channel 8 is also formed from the intermediate wall 7 together with a region of the outer wall of the filter housing 1.
  • a connection piece 9 leading into the larger chamber 4 is provided for connecting a tank ventilation line.
  • a strainer basket 10 is placed over the mouth of this connecting piece 9 leading into the activated carbon.
  • Via a further connecting piece 11, the larger chamber 4 can be connected to a region of the intake air line of the internal combustion engine that is under vacuum during engine operation. The latter connection can be interrupted by a valve.
  • a connecting piece 12 leading to the atmosphere is located on an air filter housing 13 connected to the adsorption filter housing 1.
  • An annular air filter 14 is seated in the air filter housing 13, the area with the connecting line 12 to the atmosphere lying radially outside and the area lying radially inside Area connected to the flow channel 8.
  • a housing with a compressed air source 15 is directly connected to the filter housing 1, this compressed air source being specifically an air pump.
  • the housing of the compressed air source 15 is connected via connection lines 16 and 17 leading into the interior of the filter housing 1.
  • the housing of the compressed air source 15 of the filter housing 1 is connected between vibration-isolating elements 18.
  • the connecting line 17 leads from the pressure side of the compressed air source 15 into a flow space 19 which connects to that of the larger one Chamber 4 adjoins the distant end of the smaller chamber 3.
  • a closure valve 20 is provided in the connection line 17 and can be arranged in particular at the transition of the housing of the compressed air source 15 to this line.
  • the compressed air source 15 is connected on the suction side to the flow channel 8 via the connecting line 16.
  • Fuel vapor flowing out of a tank passes through the connecting line 9 m to the larger chamber 4 of the adsorption filter housing 1 filled with activated carbon.
  • the chamber 4 leaves the fuel vapor pretreated there in the direction of the smaller chamber 3 also filled with activated carbon , which it flows into into the flow space 19.
  • the tank ventilation stream freed from fuel passes through the supply and discharge lines 17 and 16 to the compressed air source 15 in order to get into the atmosphere through the flow space 8 through the air filter 14 through the connecting piece 12.
  • the compressed air source 15 is designed to be permeable for this flow guidance of the tank ventilation flow. Regeneration of the adsorbent of the adsorption filter
  • the internal combustion engine is flown through in the opposite direction, atmospheric air being sucked in through the connecting piece 12, and engine intake air is sucked in through the connecting piece 11.
  • the air drawn in flows through the adsorption filter first through the smaller and then through the larger chamber 3 or 4.
  • the tank ventilation system can be pressurized overall by the compressed air source 15.
  • the area to be pressurized lies between the connecting piece 11 and the connecting line 17, which can be closed by means of valves (not shown) for carrying out the test and comprises the fuel tank (not shown) connected to the connecting piece 9.
  • the compressed air is generated directly inside the housing of the compressed air source 15, which is designed as a compressed air pump, and is introduced into the system via line 17.
  • the compressed air source 15 sucks the air to be compressed from the air filter housing 13 via the connecting line 16.
  • the exact type of leak test the tank ventilation system is known per se and therefore requires no further explanation here.
  • the compressed air source 15 designed as an air pump, can continuously convey backwash air through the filter 1 into the connecting piece 11 of the intake air line of the engine.
  • an outflow valve 21 with a blocking effect can be arranged in the direction of the fuel tank.
  • the air volume flow which is conveyed through the filter 1 by the air pump 15 during engine operation, is controlled or regulated depending on relevant engine operating data, the exhaust gas composition and / or the fuel loading state of the adsorption material of the filter 1.

Abstract

A process and device are provided to supply the air mass flux required to regenerate the adsorption material of an adsorption filter (1) in the fuel tank venting system of an internal combustion engine while the engine is running and independently of a depression in the air intake pipe (12) of the engine. For this purpose, atmospheric air is fed at least partially and temporarily by an air pump (15) through the adsorption filter (1) to the air intake pipe (8) of the internal combustion engine while the engine is running. The air pump (15) integrated in the device makes it possible to obtain a module which is easy to produce and to handle and which contains all units of the venting system.

Description

Adsorptions-Filter einer Kraftstofftank-Entlüftungsanlage eines Verbrennungsmotors und Verfahren zum Betreiben dieser Adsorption filter of a fuel tank ventilation system of an internal combustion engine and method for operating it
Anlageinvestment
Die Erfindung betrifft ein Adsorptions-Filter einer Kraft¬ stofftank-Entlüftungsanlage eines Verbrennungsmotors nach dem Oberbegriff des Patentanspruchs 1 sowie ein Verfahren zum Betreiben dieser Anlage.The invention relates to an adsorption filter of a fuel tank ventilation system of an internal combustion engine according to the preamble of claim 1 and a method for operating this system.
Das Filter als solches ist beispielsweise aus DE 41 24 465 .-.1 bekannt.The filter as such is known for example from DE 41 24 465 .-. 1.
Hiervon ausgehend beschäftigt sich die Erfindung bezüglich des Aufbaus eines solchen Filters mit dem Problem, die ein¬ zelnen Aggregate der Kraftstofftank-Entlüftungsanlage als kompaktes, rationell zu fertigendes und einfach an den Tank sowie die Ansaugluftleitung des Verbrennungsmotors montier¬ bares Modulteil zu gestalten.Proceeding from this, the invention is concerned with the construction of such a filter with the problem of designing the individual units of the fuel tank ventilation system as a compact, rationally manageable and easy to assemble module part on the tank and the intake air line of the internal combustion engine.
Gelöst wird dieser Teil der Aufgabe durch eine Ausführung des Adsorptions-Filters nach den kennzeichnenden Merkmalen des Patentanspruchs 1. Vorteilhafte Ausgestaltungen dieser Ausführung zeigen die Unteransprüche auf.This part of the object is achieved by designing the adsorption filter according to the characterizing features of patent claim 1. Advantageous embodiments of this embodiment show the subclaims.
Zu dem Problem, mit dem sich die Erfindung beschäftigt, ge¬ hört weiterhin, bei Motoren, bei denen kein ausreichender Unterdruck - aus welchen Gründen auch immer - in der Ansaug¬ luftleitung während des Motorbetriebes herrscht, dennoch ein sicheres Regenerieren des Adsorptionsmaterials zu gewährlei¬ sten.The problem with which the invention is concerned also includes ensuring that the adsorption material is safely regenerated in engines in which there is no sufficient negative pressure - for whatever reason - in the intake air line during engine operation most.
Gelöst wird dieses den Betrieb der erfindungsgemäßen Ein¬ richtung betreffende Problem durch ein Verfahren mit den kennzeichnenden Merkmalen des Patentanspruchs 1.This problem relating to the operation of the device according to the invention is solved by a method having the characterizing features of patent claim 1.
Es ist zwar bereits aus DE 26 01 044 A1 und DE 25 47 065 A1 bekannt, ein Adsorptions-Filter mit Luft aus einer Druck¬ luftquelle zu regenerieren. Jene Einrichtungen und Verfahren betreffen ledoch Sonderfälle, die mit dem Betreiben einer Anlage, auf die sich die vorliegende Erfindung bezieht, nicht vergleichbar sind.It is already known from DE 26 01 044 A1 and DE 25 47 065 A1 to regenerate an adsorption filter with air from a compressed air source. However, those devices and methods relate to special cases which are not comparable to the operation of a system to which the present invention relates.
Zweckmäßige Ausgestaltungen sind Gegenstand der weiteren An¬ sprüche.Expedient configurations are the subject of the further claims.
Die Lehre des Anspruchs 6 sorgt dafür, daß durch m die An¬ saugleitung des Verbrennungsmotors eingepumpte, durch das Adsorptions-Filter geführte Luft das Motor-Verbrennungsver¬ fahren nicht negativ beeinflußt.The teaching of claim 6 ensures that the suction line of the internal combustion engine is pumped through m through which Air carried by adsorption filter does not adversely affect the engine combustion process.
Ein Ausführungsbeispiel der Erfindung ist in der einzigen Fig. 1 der Zeichnung schematisch dargestellt.An embodiment of the invention is shown schematically in the single Fig. 1 of the drawing.
In einem Adsorptions-Filtergehäuse 1 sind durch eine Trenn¬ wand 2 eine größere und eine kleinere Kammer zur Aufnahme von Aktivkohle als Adsorptions-Mittel für Kraftstoffdämpfe eines nicht dargestellten Tankes eines Verbrennungsmotors ausgebildet. Die kleinere Kammer ist mit 3 und die größere Kammer mit 4 bezeichnet. Die beiden Kammern 3 und 4 sind lotrecht oben und unten mit durchlässigen Abdeckungen 5 und 6 verschlossen, wobei auf den von der abgedeckten Aktivkohle abgewandten Seiten der Abdeckungen 5 und 6 jeweils zur Aus¬ bildung eines Strömungskanals ein Abstand gegenüber einer angrenzenden Wand des Filtergehäuses 1 gegeben ist. Lotrecht unten ist dieser Strömungsraum zwischen der kleineren und der größeren Kammer 3 bzw. 4 durch die Zwischenwand 2 ge¬ trennt .In an adsorption filter housing 1 a larger and a smaller chamber for receiving activated carbon are formed as adsorbents for fuel vapors of an unillustrated tank of an internal combustion engine by a partition 2. The smaller chamber is designated 3 and the larger chamber 4. The two chambers 3 and 4 are closed vertically at the top and bottom with permeable covers 5 and 6, a distance from an adjacent wall of the filter housing 1 being provided on the sides of the covers 5 and 6 facing away from the covered activated carbon in order to form a flow channel is. This flow space between the smaller and the larger chamber 3 or 4 is separated perpendicularly below by the intermediate wall 2.
Der lotrecht oberhalb der oberen Abdeckung 6 liegende Strö¬ mungskanal ist von einer Zwischenwand 7 des Filtergehäuses 1 gebildet . Von der Zwischenwand 7 wird zusammen mit einem Be¬ reich der Außenwand des Filtergehäuses 1 auch noch ein zu¬ sätzlicher separater Strömungskanal 8 gebildet. Für den Anschluß einer Tankentlüftungsleitung ist ein in die größere Kammer 4 führender Anschlußstutzen 9 vorgesehen. Über die in die Aktivkohle führende Mündung dieses Anschlu߬ stutzens 9 ist ein Siebkorb 10 gestülpt. Über einen weiteren Anschlußstutzen 11 ist die größere Kammer 4 mit einem bei Motorbetrieb unter Unterdruck stehenden Bereich der Ansaug¬ luftleitung des Verbrennungsmotors verbindbar. Die zuletzt genannte Verbindung ist durch ein Ventil unterbrechbar.The flow channel lying vertically above the upper cover 6 is formed by an intermediate wall 7 of the filter housing 1. An additional separate flow channel 8 is also formed from the intermediate wall 7 together with a region of the outer wall of the filter housing 1. A connection piece 9 leading into the larger chamber 4 is provided for connecting a tank ventilation line. A strainer basket 10 is placed over the mouth of this connecting piece 9 leading into the activated carbon. Via a further connecting piece 11, the larger chamber 4 can be connected to a region of the intake air line of the internal combustion engine that is under vacuum during engine operation. The latter connection can be interrupted by a valve.
Ein zur Atmosphäre führender Anschlußstutzen 12 befindet sich an einem mit dem Adsorptions-Filtergehäuse 1 verbunde¬ nen Luftfiltergehäuse 13. In dem Luftflltergehäuse 13 sitzt ein ringförmiges Luftfilter 14, dessen radial außen liegen¬ der Bereich mit der Anschlußleitung 12 zur Atmosphäre und dessen radial innen liegender Bereich mit dem Strömungskanal 8 verbunden ist.A connecting piece 12 leading to the atmosphere is located on an air filter housing 13 connected to the adsorption filter housing 1. An annular air filter 14 is seated in the air filter housing 13, the area with the connecting line 12 to the atmosphere lying radially outside and the area lying radially inside Area connected to the flow channel 8.
An das Filtergehäuse 1 direkt angebunden ist ein Gehäuse mit einer Druckluftquelle 15, wobei diese Druckluftquelle spezi¬ ell eine Luftpumpe ist. Die Anbindung des Gehäuses der Druckluftquelle 15 ist über in das Innere des Filtergehäuses 1 führende Verbmdungsleitungen 16 und 17 gegeben. Innerhalb dieser Verbmdungsleitungen sind jeweils das Gehäuse der Druckluftquelle 15 von dem Filtergehäuse 1 schwingungsent- koppelnde Elemente 18 zwischengeschaltet . Die Verbindungs- leitung 17 führt von der Druckseite der Druckluftquelle 15 aus in einen Strömungsraum 19, der an das von der größeren Kammer 4 stromungsseitig entfernte Ende der kleineren Kammer 3 angrenzt. In der Verbmdungsleitung 17 ist ein Verschlu߬ ventil 20 vorgesehen, das insbesondere an dem Übergang des Gehäuses der Druckluftquelle 15 zu dieser Leitung angeordnet sein kann. Über die Verbindungsleitung 16 steht die Druck- luftquelle 15 saugseitig mit dem Strömungskanal 8 in Verbin¬ dung.A housing with a compressed air source 15 is directly connected to the filter housing 1, this compressed air source being specifically an air pump. The housing of the compressed air source 15 is connected via connection lines 16 and 17 leading into the interior of the filter housing 1. Within these connection lines, the housing of the compressed air source 15 of the filter housing 1 is connected between vibration-isolating elements 18. The connecting line 17 leads from the pressure side of the compressed air source 15 into a flow space 19 which connects to that of the larger one Chamber 4 adjoins the distant end of the smaller chamber 3. A closure valve 20 is provided in the connection line 17 and can be arranged in particular at the transition of the housing of the compressed air source 15 to this line. The compressed air source 15 is connected on the suction side to the flow channel 8 via the connecting line 16.
Die Funktion der beschriebenen Entlüftungsanlage ist wie folgtThe function of the ventilation system described is as follows
Beladung mit Kraftstoffdämpfen aus dem KraftstofftankLoading with fuel vapors from the fuel tank
Aus einem nicht dargestellten Tank ausströmender Kraftstoff¬ dampf gelangt über die Anschlußleitung 9 m die mit Aktiv¬ kohle gefüllte größere Kammer 4 des Adsorptions- Filtergehäuses 1. Die Kammer 4 verläßt der dort vorbehandel¬ te Kraftstoffdampf in Richtung der kleineren ebenfalls mit Aktivkohle gefüllten Kammer 3, die er in den Strömungsraum 19 hinein durchströmt. Von dort aus passiert der von Kraft¬ stoff befreite Tankentlüftungsstrom über die Zu- und Abführ- leitungen 17 und 16 die Druckluftquelle 15, um durch den Strömungsraum 8 hindurch über das Luftfilter 14 durch den Anschlußstutzen 12 in die Atmosphäre zu gelangen. Die Druck¬ luftquelle 15 ist für diese Strömungsführung des Tankentlüf- tungsstromes durchlässig gestaltet. Regeneration des Adsorptions-Mittels des Adsorptions-FiltersFuel vapor flowing out of a tank (not shown) passes through the connecting line 9 m to the larger chamber 4 of the adsorption filter housing 1 filled with activated carbon. The chamber 4 leaves the fuel vapor pretreated there in the direction of the smaller chamber 3 also filled with activated carbon , which it flows into into the flow space 19. From there, the tank ventilation stream freed from fuel passes through the supply and discharge lines 17 and 16 to the compressed air source 15 in order to get into the atmosphere through the flow space 8 through the air filter 14 through the connecting piece 12. The compressed air source 15 is designed to be permeable for this flow guidance of the tank ventilation flow. Regeneration of the adsorbent of the adsorption filter
Zur Regeneration des Adsorptions-Filters wird dieses bei laufendem Verbrennungsmotor in umgekehrter Richtung durch¬ strömt, wobei Atmosphärenluft durch den Anschlußstutzen 12 von Motoransaugluft durch den Anschlußstutzen 11 angesaugt wird. Die angesaugte Luft durchströmt auf ihrem Weg durch das Adsorptions-Filter zunächst die kleinere und danach die größere Kammer 3 bzw. 4.For regeneration of the adsorption filter, the internal combustion engine is flown through in the opposite direction, atmospheric air being sucked in through the connecting piece 12, and engine intake air is sucked in through the connecting piece 11. The air drawn in flows through the adsorption filter first through the smaller and then through the larger chamber 3 or 4.
Dichtheits-SicherheitskontrolleLeakage security check
Für regelmäßig nach an sich bekannten Vorgaben durchzufüh¬ rende Dichtheits-Sicherheitskontrollen kann die Tank- Entlüftungsanlage insgesamt durch die Druckluftquelle 15 un¬ ter Druck gesetzt werden. Der unter Druck zu setzende Be¬ reich liegt zwischen dem Anschlußstutzen 11 und der Verbin¬ dungsleitung 17, die zur Durchführung der Prüfung über nicht dargestellte Ventile verschließbar sind und umfaßt den an den Anschlußstutzen 9 angeschlossenen nicht dargestellten Kraftstofftank. Die Druckluft wird direkt innerhalb des Ge¬ häuses der als Druckluftpumpe ausgeführten Druckluftquelle 15 erzeugt und über die Leitung 17 in das Anlagensystem ein¬ geführt. Die Druckluftquelle 15 saugt die zu verdichtende Luft über die Verbindungsleitung 16 aus dem Luftflltergehäu- se 13 an. Die genaue Art einer Dichtheits-Sicherheitsprüfung der Tankentlüftungsanlage ist an sich bekannt und bedarf da¬ her hier keiner weiteren Erläuterung.For tightness security checks to be carried out regularly according to known specifications, the tank ventilation system can be pressurized overall by the compressed air source 15. The area to be pressurized lies between the connecting piece 11 and the connecting line 17, which can be closed by means of valves (not shown) for carrying out the test and comprises the fuel tank (not shown) connected to the connecting piece 9. The compressed air is generated directly inside the housing of the compressed air source 15, which is designed as a compressed air pump, and is introduced into the system via line 17. The compressed air source 15 sucks the air to be compressed from the air filter housing 13 via the connecting line 16. The exact type of leak test the tank ventilation system is known per se and therefore requires no further explanation here.
Aktive Druckluftquelle bei MotorbetriebActive compressed air source during engine operation
Während des Motorbetriebes kann die als Luftpumpe ausgeführ¬ te Druckluftquelle 15 laufend Rückspülluft durch das Filter 1 in den Anschlußstutzen 11 der Ansaugluftleitung des Motors fördern.During engine operation, the compressed air source 15, designed as an air pump, can continuously convey backwash air through the filter 1 into the connecting piece 11 of the intake air line of the engine.
In dem Anschlußstutzen 9, der zu dem nicht dargestellten Kraftstofftank führt, kann ein Emwegeventil 21 mit Sperr¬ wirkung m Richtung des Kraftstofftankes angeordnet sein.In the connecting piece 9, which leads to the fuel tank (not shown), an outflow valve 21 with a blocking effect can be arranged in the direction of the fuel tank.
Der Luftmengenstrom, der während des Motorbetriebes von der Luftpumpe 15 durch das Filter 1 hindurch gefördert wird, wird in Abhängigkeit von relevanten Motorbetriebsdaten, der Abgaszusammensetzung und/oder dem Kraftstoff-Beladungszu¬ stand des Adsorptions-Materials des Filters 1 gesteuert bzw. geregelt.The air volume flow, which is conveyed through the filter 1 by the air pump 15 during engine operation, is controlled or regulated depending on relevant engine operating data, the exhaust gas composition and / or the fuel loading state of the adsorption material of the filter 1.
Durch die erfindungsgemäße Integration sämtlicher Aggregate einer Tankentlüftungsanlage im das Gehäuse des Adsorptions- Filters dieser Anlage ist ein rationell herstellbares Modul- teil gegeben, das lediglich über die Anschlußstutzen 9 und 11 an den Verbrennungsmotor bzw. den Tank angefügt zu werden braucht. Zur Erlangung dieses Vorteiles trägt wesentlich ei- ne autonom arbeitende in das Adsorptions-Filtergehause inte¬ grierte Druckluftquelle bei. Bezüglich der Anbindung dieser Druckluftquelle an das Adsorptions-Filtergehause ist dabei noch wichtig, daß diese über schwingungsentkoppelnde Elemen¬ te erfolgt, wobei diese einfach in die Anschlußstutzen inte¬ griert werden können. The inventive integration of all units of a tank ventilation system in the housing of the adsorption filter of this system provides an economically producible module part which only needs to be attached to the internal combustion engine or the tank via the connecting pieces 9 and 11. To achieve this advantage, ne autonomously working compressed air source integrated into the adsorption filter housing. With regard to the connection of this compressed air source to the adsorption filter housing, it is still important that this takes place via vibration-decoupling elements, and these can easily be integrated into the connecting pieces.

Claims

Patentansprüche claims
1. Adsorptions-Filter einer Kraftstofftank-1. Adsorption filter of a fuel tank
Entlüftungsanlage eines Verbrennungsmotors mit Anschlüssen gegenüber der Atmosphäre, zu dem Kraftstofftank, zu der Ansaugluftleitung des Verbrennungsmotors, von denen diejenigen gegenüber Atmosphäre und zu der An¬ saugleitung durch jeweils ein Ventil verschließbar sind, sowie zu einer Druckluftquelle, mit der die Entlüftungs- anlage bei geschlossenen Zu- und Abführventilen für re¬ gelmäßig vorzunehmende Dichtheitsprüfungen unter Druck gesetzt v/erden kann, und mit einer Lagerung des Adsorptions-Mittels in zwei von¬ einander getrennten strömungsmäßig in Reihe geschalteten vo¬ lumenverschiedenen Adsorptions-Kammern des Filters, gekennzeichnet durch die Merkmale, die größere (4) der beiden Adsorptions-Kammern (3, 4) ist mit den Anschlüssen (9, 11) zu einerseits dem Kraft¬ stofftank und andererseits der Ansaugluftleitung verse - hen, wobei die Öffnung des Anschlußstutzens (11) der An¬ saugluftleitung auf das strömungsmäßig von der kleineren Kammer (3) entfernt liegende Ende der größeren Kammer (4) mündet, die Druckluftquelle (15) ist in einem Gehäuse unterge¬ bracht, das an dem Gehäuse (1) des Adsorptions-Filters angebracht und über eine erste Leitung (17) mit dem strömungsmäßig von der größeren Kammer (4) entfernt lie¬ genden Ende der kleineren Kammer (3) und über eine zwei¬ te Leitung (16) über ein an dem Gehäuse (1) des Adsorp¬ tions-Filters vorgesehenes Luftfiltergehäuse (13) mit der Atmosphäre verbunden ist, das Gehäuse der Druckluftquelle (15) liegt in dem Strö¬ mungsweg zwischen der Atmosphäre und dem stromungsseitig von der größeren Kammer (4) entfernt liegenden Ende der kleinen Kammer (3) .Ventilation system of an internal combustion engine with connections to the atmosphere, to the fuel tank, to the intake air line of the internal combustion engine, of which those from the atmosphere and to the intake line can each be closed by a valve, and to a compressed air source with which the ventilation system is closed Supply and discharge valves for tightness tests to be carried out regularly can be pressurized, and with a storage of the adsorbent in two separate, volume-flow adsorption chambers of the filter connected in series, characterized by the features, The larger (4) of the two adsorption chambers (3, 4) is provided with the connections (9, 11) on the one hand to the fuel tank and on the other hand to the intake air line, the opening of the connection piece (11) of the intake air line on the flow away from the smaller chamber (3) lying end of the larger chamber (4) opens, the compressed air source (15) is accommodated in a housing which is attached to the housing (1) of the adsorption filter and is connected via a first line (17) to the end of the smaller one which is in terms of flow from the larger chamber (4) Chamber (3) and a second line (16) via an air filter housing (13) provided on the housing (1) of the adsorption filter is connected to the atmosphere, the housing of the compressed air source (15) lies in the flow ¬ path between the atmosphere and the end of the small chamber (3) located on the flow side from the larger chamber (4).
2. Adsorptions-Filter nach Anspruch 1 , dadurch gekennzeichnet, daß die Strömungskanäle (16, 8; 17, 19) zwischen dem Gehäuse der Druckluftquelle (15) und der Atmosphäre einerseits und der kleinen Kammer (3) andererseits innerhalb des Gehäuses (1) des Adsorptions-Filters verlaufen.2. Adsorption filter according to claim 1, characterized in that the flow channels (16, 8; 17, 19) between the housing of the compressed air source (15) and the atmosphere on the one hand and the small chamber (3) on the other hand within the housing (1) of the adsorption filter.
3 . Adsorptions-Filter , d a d u r c h g e k e n n z e i c h n e t , daß das Gehäuse der Druckluftquelle (15) über Anschlußlei- tungen (16, 17) schwmgungsentkoppelt mit dem Gehäuse (1) des Adsorptions-Filters verbunden ist. 3rd Adsorption filter, characterized in that the housing of the compressed air source (15) is connected to the housing (1) of the adsorption filter in a vibration-decoupled manner via connecting lines (16, 17).
4. Verfahren zum Betreiben einer Kraftstofftank-Entlüf¬ tungsanlage eines Verbrennungsmotors mit einem Adsorptions- Filter nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Druckluftquelle (15) während des Motorbetriebes zu¬ mindest teil- und zeitweise Luft in die Ansaugluftleitung des Verbrennungsmotors fördert .4. A method for operating a fuel tank ventilation system of an internal combustion engine with an adsorption filter according to one of the preceding claims, characterized in that the compressed air source (15) at least partially and temporarily promotes air into the intake air line of the internal combustion engine during engine operation .
5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß in der Verbindungsleitung zwischen dem Adsorptions- Filter (1) und dem Kraftstofftank ein in Richtung des Kraft- stofftankes sperrendes Emwegeventil (21) angeordnet ist.5. The method according to claim 4, characterized in that in the connecting line between the adsorption filter (1) and the fuel tank in the direction of the fuel tank blocking out valve (21) is arranged.
6. Verfahren nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß der zur Regeneration durch das Adsorptions-Filter (1) geförderte Luftmengenstrom in Abhängigkeit relevanter Motor¬ betriebsdaten, der Abgaszusammensetzung und/oder des Bela¬ dungszustandes des Adsorptions-Materials des Filters gesteu¬ ert bzw. geregelt wird. 6. The method according to claim 4 or 5, characterized in that the air flow promoted for regeneration by the adsorption filter (1) in dependence on relevant engine operating data, the exhaust gas composition and / or the loading state of the adsorption material of the filter is control is regulated or regulated.
EP97926982A 1996-06-14 1997-06-06 Adsorption filter for the fuel tank venting system of an internal combustion engine and process for operating said system Expired - Lifetime EP0865571B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19623740 1996-06-14
DE1996123740 DE19623740A1 (en) 1996-06-14 1996-06-14 Adsorption filter for fuel tank venting installation of internal combustion engine
DE19628153 1996-07-12
DE19628153A DE19628153B4 (en) 1996-06-14 1996-07-12 Method for operating a fuel tank ventilation system of an internal combustion engine
PCT/DE1997/001137 WO1997047874A1 (en) 1996-06-14 1997-06-06 Adsorption filter for the fuel tank venting system of an internal combustion engine and process for operating said system

Publications (2)

Publication Number Publication Date
EP0865571A1 true EP0865571A1 (en) 1998-09-23
EP0865571B1 EP0865571B1 (en) 1999-12-08

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US (1) US5983870A (en)
EP (1) EP0865571B1 (en)
DE (2) DE19628153B4 (en)
ES (1) ES2141619T3 (en)
WO (1) WO1997047874A1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6196202B1 (en) * 1997-07-28 2001-03-06 Siemens Canada Limited Evaporative emission system for low engine intake system vacuums
JP2000161151A (en) * 1998-11-24 2000-06-13 Mitsubishi Electric Corp Evaporated fuel gas discharge restraint device
US7562651B2 (en) * 2007-11-19 2009-07-21 Mahle Technology, Inc. Vapor canister having integrated evaporative emission purge actuation monitoring system having fresh air filter
DE102010019046A1 (en) * 2010-05-03 2011-11-03 Mahle International Gmbh filter layer
DE102010064239A1 (en) * 2010-12-28 2012-06-28 Robert Bosch Gmbh Venting system, in particular for a fuel tank

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2298005A1 (en) * 1975-01-15 1976-08-13 Peugeot & Renault PROCESS AND DEVICE FOR RECYCLING THE CARBURETOR OF HYDROCARBON VAPORS
DE2547065A1 (en) * 1975-10-21 1977-09-08 Bosch Gmbh Robert IC engine fuel tank venting system with valves - has carbon filter and valve preventing excessive fuel enrichment on starting
JPS5510081A (en) * 1978-07-10 1980-01-24 Toyota Motor Corp Collecting and purging device of fuel vapor in engine
DE4124465C2 (en) * 1991-07-24 2002-11-14 Bosch Gmbh Robert Tank ventilation system and motor vehicle with such and method and device for checking the functionality of such
JPH05312113A (en) * 1992-05-13 1993-11-22 Nippondenso Co Ltd Evaporative emission control device
JP2917712B2 (en) * 1992-11-02 1999-07-12 トヨタ自動車株式会社 Internal combustion engine
US5411004A (en) * 1993-02-03 1995-05-02 Siemens Automotive Limited Positive pressure canister purge system integrity confirmation
DE4317634A1 (en) * 1993-05-27 1994-12-01 Bosch Gmbh Robert Method and device for checking the tightness of a tank venting installation
JP3111396B2 (en) * 1993-10-04 2000-11-20 本田技研工業株式会社 Evaporative fuel emission control device
DE4335126B4 (en) * 1993-10-15 2006-07-06 Robert Bosch Gmbh Leak test device for a tank ventilation system
JPH07133744A (en) * 1993-11-09 1995-05-23 Honda Motor Co Ltd Evaporation fuel discharge suppress device
US5408976A (en) * 1994-05-02 1995-04-25 General Motors Corporation Swellable adsorbent diagnostic for fuel vapor handling system
US5560347A (en) * 1994-05-02 1996-10-01 General Motors Corporation Conductive foam vapor sensing
US5499614A (en) * 1994-11-03 1996-03-19 Siemens Electric Limited Means and method for operating evaporative emission system leak detection pump
US5483942A (en) * 1995-02-24 1996-01-16 Siemens Electric Limited Fuel vapor leak detection system
JP3886587B2 (en) * 1996-03-01 2007-02-28 ロベルト・ボッシュ・ゲゼルシャフト・ミト・ベシュレンクテル・ハフツング Airtight test method for tank system of vehicle with internal combustion engine
JP3265985B2 (en) * 1996-05-17 2002-03-18 トヨタ自動車株式会社 Fuel vapor treatment device
JPH09324715A (en) * 1996-06-06 1997-12-16 Toyota Motor Corp Fuel supply equipment for internal combustion engine
DE19623740A1 (en) * 1996-06-14 1997-12-18 Knecht Filterwerke Gmbh Adsorption filter for fuel tank venting installation of internal combustion engine
US5857446A (en) * 1996-07-01 1999-01-12 Norton; Peter Fuel vapor source
JP3401778B2 (en) * 1996-08-12 2003-04-28 トヨタ自動車株式会社 Failure diagnosis device for evaporation purge system
DE19636431B4 (en) * 1996-09-07 2009-05-14 Robert Bosch Gmbh Method and device for testing the functionality of a tank ventilation system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9747874A1 *

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Publication number Publication date
DE59700822D1 (en) 2000-01-13
ES2141619T3 (en) 2000-03-16
US5983870A (en) 1999-11-16
EP0865571B1 (en) 1999-12-08
WO1997047874A1 (en) 1997-12-18
DE19628153A1 (en) 1998-03-05
DE19628153B4 (en) 2009-04-16

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