EP0865571A1 - Filtre adsorbant pour le systeme de mise a l'air libre du reservoir de carburant d'un moteur a combustion interne et procede d'utilisation de ce systeme - Google Patents

Filtre adsorbant pour le systeme de mise a l'air libre du reservoir de carburant d'un moteur a combustion interne et procede d'utilisation de ce systeme

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)
English (en)
Other versions
EP0865571B1 (fr
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/de
Application filed by Knecht Filterwerk GmbH filed Critical Knecht Filterwerk GmbH
Publication of EP0865571A1 publication Critical patent/EP0865571A1/fr
Application granted granted Critical
Publication of EP0865571B1 publication Critical patent/EP0865571B1/fr
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.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
  • Separation Of Gases By Adsorption (AREA)

Abstract

Le procédé et le dispositif décrits servent à amener pendant la marche du moteur le courant volumique d'air requis pour régénérer le matériau adsorbant dont se compose le filtre adsorbant (1) du système de mise à l'air libre du réservoir de carburant d'un moteur à combustion interne, indépendamment d'une dépression éventuelle dans la tubulure (12) d'aspiration d'air du moteur. A cet effet, une pompe à air (15) refoule au moins partiellement et temporairement l'air atmosphérique pendant la marche du moteur à travers le filtre d'adsorption (1) dans la tubulure (8) d'aspiration d'air du moteur à combustion interne. La pompe à air (15) intégrée dans le dispositif permet d'obtenir un module facile à produire et à manier dans lequel sont réunis tous les organes du système d'aération.
EP97926982A 1996-06-14 1997-06-06 Filtre adsorbant pour le systeme de mise a l'air libre du reservoir de carburant d'un moteur a combustion interne et procede d'utilisation de ce systeme Expired - Lifetime EP0865571B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE1996123740 DE19623740A1 (de) 1996-06-14 1996-06-14 Adsorptions-Filter einer Kraftstoff-Entlüftungsanlage eines Verbrennungsmotors
DE19623740 1996-06-14
DE19628153A DE19628153B4 (de) 1996-06-14 1996-07-12 Verfahren zum Betreiben einer Kraftstofftank-Entlüftungsanlage eines Verbrennungsmotors
DE19628153 1996-07-12
PCT/DE1997/001137 WO1997047874A1 (fr) 1996-06-14 1997-06-06 Filtre adsorbant pour le systeme de mise a l'air libre du reservoir de carburant d'un moteur a combustion interne et procede d'utilisation de ce systeme

Publications (2)

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

Family

ID=26026571

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97926982A Expired - Lifetime EP0865571B1 (fr) 1996-06-14 1997-06-06 Filtre adsorbant pour le systeme de mise a l'air libre du reservoir de carburant d'un moteur a combustion interne et procede d'utilisation de ce systeme

Country Status (5)

Country Link
US (1) US5983870A (fr)
EP (1) EP0865571B1 (fr)
DE (2) DE19628153B4 (fr)
ES (1) ES2141619T3 (fr)
WO (1) WO1997047874A1 (fr)

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 (ja) * 1998-11-24 2000-06-13 Mitsubishi Electric Corp 燃料蒸発ガス排出抑止装置
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 (de) * 2010-05-03 2011-11-03 Mahle International Gmbh Filterlage
DE102010064239A1 (de) * 2010-12-28 2012-06-28 Robert Bosch Gmbh Entlüftungssystem, insbesondere für einen Kraftstofftank

Family Cites Families (22)

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Publication number Priority date Publication date Assignee Title
FR2298005A1 (fr) * 1975-01-15 1976-08-13 Peugeot & Renault Procede et dispositif de recyclage au carburateur de vapeurs d'hydrocarbures
DE2547065A1 (de) * 1975-10-21 1977-09-08 Bosch Gmbh Robert Vorrichtung zur regelung der kraftstofftankentlueftung einer brennkraftmaschine
JPS5510081A (en) * 1978-07-10 1980-01-24 Toyota Motor Corp Collecting and purging device of fuel vapor in engine
DE4124465C2 (de) 1991-07-24 2002-11-14 Bosch Gmbh Robert Tankentlüftungsanlage und Kraftfahrzeug mit einer solchen sowie Verfahren und Vorrichtung zum Prüfen der Funktionsfähigkeit einer solchen
JPH05312113A (ja) * 1992-05-13 1993-11-22 Nippondenso Co Ltd 燃料蒸発ガス拡散防止装置
JP2917712B2 (ja) * 1992-11-02 1999-07-12 トヨタ自動車株式会社 内燃機関
US5411004A (en) * 1993-02-03 1995-05-02 Siemens Automotive Limited Positive pressure canister purge system integrity confirmation
DE4317634A1 (de) * 1993-05-27 1994-12-01 Bosch Gmbh Robert Verfahren und Vorrichtung zum Überprüfen der Dichtheit einer Tankentlüfungsanlage
JP3111396B2 (ja) * 1993-10-04 2000-11-20 本田技研工業株式会社 蒸発燃料排出抑制装置
DE4335126B4 (de) * 1993-10-15 2006-07-06 Robert Bosch Gmbh Vorrichtung zur Dichtheitsprüfung eines Tankentlüftungssystems
JPH07133744A (ja) * 1993-11-09 1995-05-23 Honda Motor Co Ltd 蒸発燃料排出抑止装置
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 (ja) * 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 内燃機関付車両のタンク系統の気密試験方法
JP3265985B2 (ja) * 1996-05-17 2002-03-18 トヨタ自動車株式会社 燃料蒸気処理装置
JPH09324715A (ja) * 1996-06-06 1997-12-16 Toyota Motor Corp 内燃機関の燃料供給装置
DE19623740A1 (de) * 1996-06-14 1997-12-18 Knecht Filterwerke Gmbh Adsorptions-Filter einer Kraftstoff-Entlüftungsanlage eines Verbrennungsmotors
US5857446A (en) * 1996-07-01 1999-01-12 Norton; Peter Fuel vapor source
JP3401778B2 (ja) * 1996-08-12 2003-04-28 トヨタ自動車株式会社 エバポパージシステムの故障診断装置
DE19636431B4 (de) * 1996-09-07 2009-05-14 Robert Bosch Gmbh Verfahren und Vorrichtung zur Prüfung der Funktionsfähigkeit einer Tankentlüftungsanlage

Non-Patent Citations (1)

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

Also Published As

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

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