WO1995010701A1 - Procede et dispositif de controle du systeme de mise a l'air libre du reservoir d'un vehicule a moteur - Google Patents

Procede et dispositif de controle du systeme de mise a l'air libre du reservoir d'un vehicule a moteur Download PDF

Info

Publication number
WO1995010701A1
WO1995010701A1 PCT/DE1994/001211 DE9401211W WO9510701A1 WO 1995010701 A1 WO1995010701 A1 WO 1995010701A1 DE 9401211 W DE9401211 W DE 9401211W WO 9510701 A1 WO9510701 A1 WO 9510701A1
Authority
WO
WIPO (PCT)
Prior art keywords
tank ventilation
motor vehicle
fuel
tank
diagnostic unit
Prior art date
Application number
PCT/DE1994/001211
Other languages
German (de)
English (en)
Inventor
Martin Constien
Original Assignee
Siemens Aktiengesellschaft
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
Application filed by Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Priority to EP94928769A priority Critical patent/EP0723628A1/fr
Priority to JP7511175A priority patent/JPH09503839A/ja
Publication of WO1995010701A1 publication Critical patent/WO1995010701A1/fr

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
    • 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

Definitions

  • the invention relates to a method and an arrangement for checking a tank ventilation system in a motor vehicle, which collects fuel vapors and supplies an internal combustion engine, according to the preambles of patent claims 1 and 10.
  • the tank ventilation system known from DE 40 12 111 Cl has a fuel tank which is connected via a line to an activated carbon canister.
  • the hydrocarbons evaporating due to the heating of the fuel are stored in the activated carbon filter.
  • a normally closed tank ventilation valve in the regeneration line between the activated carbon filter and the intake tract of the internal combustion engine is opened with the aid of an electronic control device, so that the negative pressure prevailing in the intake pipe sucks the fuel vapors out of the activated carbon filter and which can cause combustion in the cylinders.
  • An aeration valve arranged on the activated carbon filter is then open, so that purge air can flow through the activated carbon filter.
  • tank ventilation system Since there is a risk in such tank ventilation systems that parts of it leak or that the tank ventilation valve does not work properly, the tank ventilation system must be checked repeatedly for functionality.
  • a compressed air source e.g. a secondary air pump, a turbocharger or a brake air compressor supplies the pressure required for this.
  • the tank ventilation valve is closed, the compressed air is fed into a valve line near the tank ventilation valve, the pressure in the tank is measured, it is checked whether the pressure meets a specified pressure condition and, depending on whether the tank ventilation system is functional or not, is assessed.
  • diagnostic unit consisting essentially of a lockable ventilation valve on the activated carbon filter and corresponding pressure sensors or pressure switches with associated evaluation circuits, are installed in the respective vehicle. This has the disadvantage that each individual vehicle must be equipped with its own diagnostic unit.
  • the invention is therefore based on the object of specifying a method and an arrangement for checking a tank ventilation system in a motor vehicle, which makes it possible to detect leaks in the system in a relatively simple manner.
  • the invention is based on the idea of not installing the diagnostic unit in every vehicle, but rather in every petrol station system. With a suitable design of the tank filler neck and fuel nozzle, it is then possible to automatically carry out a tank leak diagnosis with each refueling process. In macroeconomic terms, this is much cheaper than having a separate diagnostic system for each vehicle. In addition, frequent misdiagnoses in the previous systems, e.g. largely avoided by missing a fuel cap or similar. In addition, with such a central diagnosis at the filling station system, immediately after the refueling process, there is an easier possibility to change predetermined limit values, for example for leak size detection. The type of test (overpressure and / or underpressure) can also be easily changed.
  • FIG. 1 This shows schematically a tank ventilation system in a motor vehicle with the associated connecting lines to a petrol pump of a petrol station system.
  • the reference numeral 1 schematically denotes a motor vehicle that has a tank ventilation system 20.
  • This tank ventilation system consists in a conventional manner of a fuel tank 2, which is connected via a ventilation line 3 to an activated carbon canister 4, in which the hydrocarbon vapors outgassing from the fuel tank 2 are adsorbed.
  • a regeneration line 5 leads from the activated carbon canister 4, which leads downstream of a throttle valve (not shown) into the intake tract 6 of the internal combustion engine.
  • a flow control valve, referred to below as a tank ventilation valve 7, is arranged in the regeneration line 5.
  • this tank ventilation valve 7 is actuated by an electronic control unit 8 via an electrical line (not specified).
  • a tank filler neck 9, as well as a ventilation line 21 branching off from the activated carbon filter 4, as well as an electrical connection line 10, are led from the control unit 8 to an outside of the vehicle 1 near the tank.
  • a petrol pump 12 is also shown of a petrol station system 11, which is also only shown schematically, on which fuel can be filled in a conventional manner using a fuel supply hose 13. At the end of this hose there is a nozzle 14, which is designed such that it creates a hermetically sealed connection to the tank filler neck 9 during the refueling process.
  • the dispenser 12 has a diagnostic unit 15 which contains pump elements 22 which generate the test pressure necessary for the diagnosis and a diagnostic hose 18 which is connected to the ventilation line 21 of the activated carbon filter 4 via a hermetically sealed connection.
  • An electrical diagnostic line 16 leads from the diagnostic unit 15 to a connecting element in Form of a diagnostic connector 19 on the outside of the vehicle near the area of the tank filler neck 9.
  • the diagnostic unit 15 is connected to the control unit 8 with the aid of a plug device 17 attached to the vehicle and the electrical connection 10 connected to it.
  • the leak test of the tank ventilation system 20 can be carried out with such an arrangement during each refueling process at the gas station system.
  • the fuel nozzle 14 of the fuel pump 12 is connected to the filler neck 9 of the motor vehicle 1 to be refueled.
  • the vent line 21 of the activated carbon filter 4 is also hermetically coupled to the diagnostic hose 18 of the dispenser 12.
  • the electrical connection of the diagnostic unit 15 to the electronic control unit 8 in the motor vehicle 1 is also established via the plug-in device 17, 19.
  • a tank ventilation valve 7 is installed in the tank ventilation system 20 of the motor vehicle 1 and is closed in the de-energized state, no signal for closing the tank ventilation valve 7 needs to be transmitted by the diagnostic unit 15.
  • a tank ventilation valve 7 which is open when de-energized, a signal is transmitted from the diagnostic unit 15 via the electrical connection 16, 19, 17, 10 and the control unit 8 to the tank ventilation valve 7 in order to close it before the diagnosis and during to keep the diagnosis closed.
  • the diagnosis is carried out after the refueling process or when the refueling process is interrupted.
  • the diagnosis itself can be carried out using either a negative pressure or a positive pressure method, as is known from the described prior art.
  • the diagnostic unit 15 in the fuel dispenser 12 contains pump elements 22, which build up the test pressure and a pressure sensor or a pressure switch 23. After the fueling process has been ended or interrupted, this can be prevented, for example, by releasing the fuel nozzle 14 or by automatically switching off the fuel supply Overflow of the fuel can be detected - the pump elements 22 of the diagnostic unit 15 are activated in order to generate either an overpressure or a vacuum in the tank ventilation system 20 via the diagnostic hose 18, depending on the type of test method used. The pressure increase or decrease that occurs gradually over time is monitored by the pressure sensor 23 in the diagnostic unit 15. When a predetermined maximum pressure value is reached, the pump elements are switched off. An unwanted and thus falsifying the result of the diagnosis pressure reduction after switching off the pump elements 22 and before starting the evaluation of the pressure change can be prevented either by the construction of the pump elements themselves or by using check valves.
  • the pressure sensor or the pressure switch 23 is then used to determine whether the pressure has changed within a specific, defined diagnosis time.
  • the pressure change within this time is a measure of the leakage in the tank ventilation system.
  • the diagnostic unit 15 does not need to contain any means which have to build up a negative or positive pressure for testing.
  • connection between the petrol pump 12, diagnostic unit 15 and the motor vehicle can be established particularly easily and comfortably if both the fuel supply hose 13, the diagnostic hose 18 and the electrical connection are established with a single coupling device.

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)

Abstract

L'invention concerne le contrôle de l'étanchéité du système (20) de mise à l'air libre du réservoir par surpression et dépression. L'unité de diagnostic (15) est intégrée dans le distributeur d'essence (12) de la station-service (11), et non dans le véhicule (1).
PCT/DE1994/001211 1993-10-15 1994-10-13 Procede et dispositif de controle du systeme de mise a l'air libre du reservoir d'un vehicule a moteur WO1995010701A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP94928769A EP0723628A1 (fr) 1993-10-15 1994-10-13 Procede et dispositif de controle du systeme de mise a l'air libre du reservoir d'un vehicule a moteur
JP7511175A JPH09503839A (ja) 1993-10-15 1994-10-13 自動車に用いられるタンク排気システムを検査するための方法および装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4335276.6 1993-10-15
DE19934335276 DE4335276C1 (de) 1993-10-15 1993-10-15 Verfahren und Anordnung zum Überprüfen eines Tankentlüftungssystems für ein Kraftfahrzeug

Publications (1)

Publication Number Publication Date
WO1995010701A1 true WO1995010701A1 (fr) 1995-04-20

Family

ID=6500287

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1994/001211 WO1995010701A1 (fr) 1993-10-15 1994-10-13 Procede et dispositif de controle du systeme de mise a l'air libre du reservoir d'un vehicule a moteur

Country Status (4)

Country Link
EP (1) EP0723628A1 (fr)
JP (1) JPH09503839A (fr)
DE (1) DE4335276C1 (fr)
WO (1) WO1995010701A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7284530B2 (en) 2004-11-02 2007-10-23 Denso Corporation Leak detector for fuel vapor purge system
DE19607772B4 (de) * 1996-03-01 2007-12-20 Robert Bosch Gmbh Verfahren zur Überwachung des Öffnungszustands eines Kraftstofftanks
CN103429452A (zh) * 2011-03-23 2013-12-04 奥迪股份公司 用于机动车的燃料箱通风装置
CN114018501A (zh) * 2021-08-06 2022-02-08 兰州交通大学 列车动态气密性阈值指标确定方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19738198A1 (de) * 1997-09-02 1999-03-04 Alfmeier Walter Gmbh & Co Verfahren und Vorrichtung zur Überwachung und Steuerung eines Behältersystems
DE19838066A1 (de) * 1998-08-21 2000-02-24 Js Aupperle Gmbh Industrietech Prüfstand für ein Zapfventil
DE19935340B4 (de) * 1999-07-28 2007-06-14 Volkswagen Ag Verfahren zur Betankung von Fahrzeugen
CN109630267B (zh) * 2018-11-16 2021-04-06 中国第一汽车股份有限公司 一种汽油发动机车辆加油状态检测方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60148762A (ja) * 1984-01-17 1985-08-06 Tokyo Tatsuno Co Ltd 給油所
DE4012111C1 (fr) * 1990-04-14 1991-03-07 Audi Ag, 8070 Ingolstadt, De
DE4124465A1 (de) * 1991-07-24 1993-01-28 Bosch Gmbh Robert Tankentlueftungsanlage und kraftfahrzeug mit einer solchen sowie verfahren und vorrichtung zum pruefen der funktionsfaehigkeit einer solchen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60148762A (ja) * 1984-01-17 1985-08-06 Tokyo Tatsuno Co Ltd 給油所
DE4012111C1 (fr) * 1990-04-14 1991-03-07 Audi Ag, 8070 Ingolstadt, De
DE4124465A1 (de) * 1991-07-24 1993-01-28 Bosch Gmbh Robert Tankentlueftungsanlage und kraftfahrzeug mit einer solchen sowie verfahren und vorrichtung zum pruefen der funktionsfaehigkeit einer solchen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 9, no. 313 (M - 437)<2036> 10 December 1985 (1985-12-10) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19607772B4 (de) * 1996-03-01 2007-12-20 Robert Bosch Gmbh Verfahren zur Überwachung des Öffnungszustands eines Kraftstofftanks
US7284530B2 (en) 2004-11-02 2007-10-23 Denso Corporation Leak detector for fuel vapor purge system
CN103429452A (zh) * 2011-03-23 2013-12-04 奥迪股份公司 用于机动车的燃料箱通风装置
US9592730B2 (en) 2011-03-23 2017-03-14 Audi Ag Tank ventilation device for a motor vehicle
CN114018501A (zh) * 2021-08-06 2022-02-08 兰州交通大学 列车动态气密性阈值指标确定方法

Also Published As

Publication number Publication date
JPH09503839A (ja) 1997-04-15
DE4335276C1 (de) 1995-05-04
EP0723628A1 (fr) 1996-07-31

Similar Documents

Publication Publication Date Title
DE19636431B4 (de) Verfahren und Vorrichtung zur Prüfung der Funktionsfähigkeit einer Tankentlüftungsanlage
DE102011115630B4 (de) Werkzeug zur diagnose eines grossen lecks für ein abgedichtetes kraftstoffsystem in einem fahrzeug
DE19735549B4 (de) Vorrichtung zur Diagnose einer Tankentlüftungsanlage eines Fahrzeugs
DE4012111C1 (fr)
DE102011104835B4 (de) Fahrzeug-Diagnosetool für geringe Spülströmung
DE102005046958A1 (de) Ventileinheit und Nachtanksensor
DE102011086955A1 (de) Luftzuführsystem eines Verbrennungsmotors
DE4401085C1 (de) Verfahren und Vorrichtung zur stationären Bestimmung von Undichtigkeiten in einer Tankentlüftungsanlage
DE102016210579A1 (de) Verfahren zur diagnose von leckagen nach der entlüftungsdurchfluss-steuerblende
DE19518292C2 (de) Verfahren zur Diagnose eines Tankentlüftungssystems
EP0952332B1 (fr) Procédé pour détecter des fuites dans les systèmes d&#39;admission de carburant pour un véhicule
DE102012219048A1 (de) Verfahren zur Überwachung der Dichtigkeit eines Kraftstofftanksystems
DE19502776C1 (de) Tankentlüftungsanlage für ein Kraftfahrzeug und Verfahren zum Überprüfen deren Funktionsfähigkeit
DE10129695A1 (de) Verfahren und Vorrichtung zur Tankleckdiagnose mittels einer Referenzmessmethode
WO2013110447A2 (fr) Système de ventilation de réservoir à carburant pour un véhicule à moteur
EP1269005B1 (fr) Procede et dispositif pour verifier l&#39;etancheite d&#39;un systeme de reservoir d&#39;un vehicule
DE102009036263A1 (de) Verfahren zur Dichtheitsprüfung eines Tanksystems
EP0503280A2 (fr) Dispositif pour mesurer la teneur en carburant dans un réservoir
DE19536646B4 (de) Verfahren zur Erkennung von Betankungsvorgängen an einem Kraftstofftank eines Fahrzeugs
EP0635633B1 (fr) Procédé de contrÔle d&#39;un système de dégazage d&#39;un réservoir captant des vapeurs d&#39;essence et les introduisant dans un moteur à combustion interne
DE4335276C1 (de) Verfahren und Anordnung zum Überprüfen eines Tankentlüftungssystems für ein Kraftfahrzeug
EP0589176B1 (fr) Méthode pour tester l&#39;étanchéité d&#39;une installation de réservoir pour véhicule
DE19502775C1 (de) Verfahren zum Überprüfen der Funktionstüchtigkeit einer Tankentlüftungsanlage für ein Kraftfahrzeug
WO2020078789A1 (fr) Unité soupape de dégazage de réservoir
DE102020205241B4 (de) Vorrichtung zur Diagnose einer Verdunstungssystemleckage und eines Tankentlüftungsleitungstraktes eines verbrennungsmotorisch betriebenen Kraftfahrzeugs

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): JP US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 1994928769

Country of ref document: EP

ENP Entry into the national phase

Ref country code: US

Ref document number: 1996 632164

Date of ref document: 19960415

Kind code of ref document: A

Format of ref document f/p: F

WWP Wipo information: published in national office

Ref document number: 1994928769

Country of ref document: EP

WWR Wipo information: refused in national office

Ref document number: 1994928769

Country of ref document: EP

WWW Wipo information: withdrawn in national office

Ref document number: 1994928769

Country of ref document: EP