EP0495161A1 - Vorrichtung zum vorübergehenden Speichern und dosierten Einspeisen von im Freiraum einer Tankanlage befindlichen, flüchtigen Kraftstoffbestandteilen in das Ansaugrohr einer Brennkraftmaschine - Google Patents

Vorrichtung zum vorübergehenden Speichern und dosierten Einspeisen von im Freiraum einer Tankanlage befindlichen, flüchtigen Kraftstoffbestandteilen in das Ansaugrohr einer Brennkraftmaschine Download PDF

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Publication number
EP0495161A1
EP0495161A1 EP91118307A EP91118307A EP0495161A1 EP 0495161 A1 EP0495161 A1 EP 0495161A1 EP 91118307 A EP91118307 A EP 91118307A EP 91118307 A EP91118307 A EP 91118307A EP 0495161 A1 EP0495161 A1 EP 0495161A1
Authority
EP
European Patent Office
Prior art keywords
signal
combustion engine
internal combustion
free space
sensor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP91118307A
Other languages
German (de)
English (en)
French (fr)
Inventor
Harald Buchalla
Stefan Burger
Rainer Franz
Joachim Heinemann
Reinhard Tinz
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.)
Carl Freudenberg KG
Original Assignee
Carl Freudenberg KG
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 Carl Freudenberg KG filed Critical Carl Freudenberg KG
Publication of EP0495161A1 publication Critical patent/EP0495161A1/de
Withdrawn legal-status Critical Current

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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
    • F02M2025/0845—Electromagnetic valves

Definitions

  • the invention relates to a device for the temporary storage and metered feeding of volatile fuel components located in the free space of a tank system into the intake pipe of an internal combustion engine, in which a line is provided between the free space and the intake pipe, the line containing an absorption element and through one of the absorption element downstream, signal-actuated servo valve can be closed, the servo valve having a permeability that can be changed by a vacuum adjuster connected upstream of it and can be controlled by the signal of a diagnostic data recording operating data of the internal combustion engine.
  • Such a device is known from DE-OS 39 09 887.
  • a method for checking the controllability of a tank ventilation valve is described therein, by means of which an additional air quantity loaded with fuel vapors can be supplied to the intake area of an internal combustion engine.
  • variables in the area of the tank ventilation valve are measured, such as, for example, the pressure, the mass flow or the volume flow of volatile fuel components through a line.
  • a sensor is arranged in the direction of movement of the volatile fuel components both in front of and behind the tank ventilation valve, which sensor is connected in a signal-conducting manner to a diagnostic block.
  • the data entering the microprocessor are preferably evaluated by forming the difference. Irregularities that affect the controllability of the tank ventilation valve are made visible on a display device when a predetermined tolerance is exceeded.
  • the invention has for its object to further develop a device of the type mentioned in such a way that no expensive and sensitive sensors are used, but rather existing signals are used as far as possible or monitoring can be carried out by simple modification of existing system components, and thus considerable costs with improved performance properties can be saved.
  • the line which is arranged between the free space of the tank system and the intake pipe, is provided with a first sensor connected upstream of the absorption element and detecting gas flows, and the vacuum adjuster with a second sensor indicating its actuation, that the first and the second Sensor are connected in a signal-conducting manner to the diagnostic block and that the two signals from the sensors in the diagnostic block are compared with the signal driving the servo valve and are used for error diagnosis.
  • the device according to the invention enables the metered feeding of volatile fuel components into the intake pipe of an internal combustion engine.
  • the basic components of the device are known from DE-PS 38 02 664 and are essentially supplemented in the present invention by the following components.
  • the data required to determine the desired value of the volatile constituents through the line into the internal combustion engine converge in a diagnostic block, which is connected in a signal-conducting manner to both the device and the internal combustion engine. This is in particular data that describe the load state of the internal combustion engine, such as the position of the throttle valve or a comparable device and the speed of the internal combustion engine.
  • the actual values, which are also fed to the diagnostic block come from a vacuum adjuster which is equipped with an integrated switching element that describes its opening position.
  • the second input signal which describes the actual value, consists of a valve unit with an integrated electrical contact, which is preferably designed as a tank ventilation valve.
  • the vacuum level with the switching element determines the pressure level in the supply line to the internal combustion engine between the absorption element and the intake manifold connection of the internal combustion engine.
  • a device for the metered feeding of volatile fuel components into the intake pipe of an internal combustion engine works, for example, as described in DE-OS 39 09 887 and in DE-PS 38 02 664.
  • the diagnostic block 14, the data the internal combustion engine 2 are transmitted, is connected in a signal-conducting manner to a vacuum adjuster 12 which is connected upstream of the servo valve 8.
  • the vacuum adjuster 12 is provided with a sensor 13 and is designed as a switching element.
  • a tank ventilation valve 21 is arranged between the free space 11 of the tank system 10, in which an electrical contact for controlling the flow rate of volatile fuel components through the line 3 is also integrated.
  • the pressure level between the absorption element 9 and the intake pipe 1 of the internal combustion engine 2 is determined by the switching element of the vacuum adjuster 12.
  • the internal combustion engine 2 is operated in a specific load state, for example in the full load state, in the part load state or in the idle state.
  • the load state is transmitted to the diagnostic block 14 by a signal 18.
  • the load state can be determined, for example, by the speed or the position of the throttle valves.
  • the diagnostic block 14 is connected to a control unit 6 for the correct actuation of the servo valve 8.
  • the control unit 6 transmits information to the diagnostic block 14 as to whether and in what way the servo valve 8 is actuated.
  • Both the load state of the internal combustion engine 2 and the position of the servo valve 8, which are described by the two signals 17 and 18, indicate the desired state.
  • a tank ventilation valve 21 which is normally used in the closed ventilation system of the tank system 10 is modified such that the signal 15 emanating therefrom preferably acts as an opening or closing signal results. If the tank ventilation valve 21 is opened, fuel vapors are vented into the absorption element 9 and are fed into the intake pipe 1 of the internal combustion engine 2 if the overall system is functioning properly.
  • both possible irregularities / defects in the device for the metered feeding of volatile fuel components can be determined reliably and reproducibly, as well as errors in the rest of the system.
  • the area from the tank system 10 to the intake pipe 1 is detected and monitored. For example, errors and defects on the servo valve 8, malfunctions in the pressurized vacuum adjuster 12, faulty activation of the servo valve 8, for example due to dropped contacts, line closures in line 3 in front of and behind the servo valve 8, faulty line connections, for example due to interchanging the connections and line interruptions will.
  • An essential advantage of the invention lies in the fact that no costly and susceptible sensors are used, but that existing signals are used as far as possible or that monitoring can be carried out by simply modifying existing system components. Components that are already in use and have already proven their suitability for series production significantly increase the functional reliability of such a system, so that the integration times and the modification effort for the user of the system can be described as extremely low.
  • the vacuum adjuster 12 which is connected upstream of the servo valve 8, is shown, which essentially consists of an electrically conductive membrane 12.1 which, via contacts 12.2, 12.3, passes information on the position of the needle of the vacuum adjustment valve 22 to the diagnostic block 14.
  • Fig. 4 shows a tank vent valve 21 as it is provided for the device according to the invention in a half-section. Then a valve plate 21.1 is pressed by a spring 26 onto a valve seat 21.2, on which an elastomer sealing washer with electrical contact is set.
  • the tank ventilation valve 21 has an electrical contact output 21.3 as well as the vacuum adjuster 12 from FIGS. 2 and 3 and, as shown in FIG. 1, is connected in a signal-conducting manner to the diagnostic block 14 via the line for the signal 15.
  • the diagnostic block 14 thus receives information about the operating state of the tank ventilation valve 21.
  • Numeral 24 denotes the connection in the direction of the absorption element 9 according to FIG.
  • numeral 25 denotes the supply line from the free space 11 of the tank system 10.
  • Vacuum safety valve provided in the form of a mushroom membrane, which releases the flow through the tank ventilation valve 21 in the event of a critical vacuum.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
EP91118307A 1991-01-11 1991-10-28 Vorrichtung zum vorübergehenden Speichern und dosierten Einspeisen von im Freiraum einer Tankanlage befindlichen, flüchtigen Kraftstoffbestandteilen in das Ansaugrohr einer Brennkraftmaschine Withdrawn EP0495161A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4100659 1991-01-11
DE4100659A DE4100659C1 (enrdf_load_stackoverflow) 1991-01-11 1991-01-11

Publications (1)

Publication Number Publication Date
EP0495161A1 true EP0495161A1 (de) 1992-07-22

Family

ID=6422861

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91118307A Withdrawn EP0495161A1 (de) 1991-01-11 1991-10-28 Vorrichtung zum vorübergehenden Speichern und dosierten Einspeisen von im Freiraum einer Tankanlage befindlichen, flüchtigen Kraftstoffbestandteilen in das Ansaugrohr einer Brennkraftmaschine

Country Status (4)

Country Link
US (1) US5220897A (enrdf_load_stackoverflow)
EP (1) EP0495161A1 (enrdf_load_stackoverflow)
CA (1) CA2058819C (enrdf_load_stackoverflow)
DE (1) DE4100659C1 (enrdf_load_stackoverflow)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4205101C2 (de) * 1992-02-20 1998-02-19 Mann & Hummel Filter Verfahren zum vorübergehenden Speichern und dosierten Einspeisen der im Freiraum einer Tankanlage befindlichen Kraftstoffdämpfe in das Ansaugrohr einer Brennkraftmaschine
DE4229110C1 (de) * 1992-09-01 1993-10-07 Freudenberg Carl Fa Vorrichtung zum vorübergehenden Speichern und dosierten Einspeisen von im Freiraum einer Tankanlage befindlichen flüchtigen Kraftstoffbestandteilen in das Ansaugrohr einer Verbrennungskraftmaschine
DE4241274C2 (de) * 1992-12-08 1999-02-11 Freudenberg Carl Fa Vorrichtung zum Einspeisen der im Freiraum eines Kraftstoffbehälters befindlichen Dämpfe in das Ansaugrohr einer Verbrennungskraftmaschine
US5592387A (en) * 1994-06-29 1997-01-07 Ford Motor Company Method of operating a natural gas vehicle as a function of ambient methane concentration
US5630403A (en) * 1996-06-13 1997-05-20 Siemens Electric Limited Force-balanced sonic flow emission control valve
WO2004113714A1 (en) * 2003-06-20 2004-12-29 Siemens Vdo Automotive Inc. Purge valve including a dual coil annular permanent magnet linear actuator

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2577993A1 (fr) * 1985-02-22 1986-08-29 Totalgaz Cie Fse Procede de regulation en continu de l'alimentation d'un moteur en carburant a l'etat gazeux et dispositif mettant en oeuvre ledit procede
EP0357882A2 (de) * 1988-09-09 1990-03-14 Firma Carl Freudenberg Vorrichtung zum dosierten Einspeisen flüchtiger Kraftstoffbestandteile in das Ansaugrohr einer Brennkraftmaschine
DE3909887A1 (de) * 1989-03-25 1990-09-27 Bosch Gmbh Robert Verfahren und vorrichtung zur ueberpruefung der steuerbarkeit eines tankentlueftungsventils

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4862856A (en) * 1986-11-29 1989-09-05 Isuzu Motors Limited Control system of evaporated fuel
US4748959A (en) * 1987-05-04 1988-06-07 Ford Motor Company Regulation of engine parameters in response to vapor recovery purge systems
DE3802664C1 (enrdf_load_stackoverflow) * 1988-01-29 1988-10-13 Fa. Carl Freudenberg, 6940 Weinheim, De
JPH0623736Y2 (ja) * 1988-08-10 1994-06-22 トヨタ自動車株式会社 内燃機関のエバポパージ異常検出装置
JPH0235952U (enrdf_load_stackoverflow) * 1988-08-29 1990-03-08
US4886026A (en) * 1988-09-01 1989-12-12 Ford Motor Company Fuel injection control system
US5054454A (en) * 1989-11-09 1991-10-08 Ford Motor Company Fuel vapor recovery control system
US5080078A (en) * 1989-12-07 1992-01-14 Ford Motor Company Fuel vapor recovery control system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2577993A1 (fr) * 1985-02-22 1986-08-29 Totalgaz Cie Fse Procede de regulation en continu de l'alimentation d'un moteur en carburant a l'etat gazeux et dispositif mettant en oeuvre ledit procede
EP0357882A2 (de) * 1988-09-09 1990-03-14 Firma Carl Freudenberg Vorrichtung zum dosierten Einspeisen flüchtiger Kraftstoffbestandteile in das Ansaugrohr einer Brennkraftmaschine
DE3909887A1 (de) * 1989-03-25 1990-09-27 Bosch Gmbh Robert Verfahren und vorrichtung zur ueberpruefung der steuerbarkeit eines tankentlueftungsventils

Also Published As

Publication number Publication date
CA2058819A1 (en) 1992-07-12
DE4100659C1 (enrdf_load_stackoverflow) 1992-05-14
CA2058819C (en) 1999-06-08
US5220897A (en) 1993-06-22

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