EP0546247B1 - Vorrichtung zum dosierten Einspeisen flüchtiger Kraftstoffbestandteile in das Ansaugrohr einer Brennkraftmaschine - Google Patents

Vorrichtung zum dosierten Einspeisen flüchtiger Kraftstoffbestandteile in das Ansaugrohr einer Brennkraftmaschine Download PDF

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Publication number
EP0546247B1
EP0546247B1 EP92111096A EP92111096A EP0546247B1 EP 0546247 B1 EP0546247 B1 EP 0546247B1 EP 92111096 A EP92111096 A EP 92111096A EP 92111096 A EP92111096 A EP 92111096A EP 0546247 B1 EP0546247 B1 EP 0546247B1
Authority
EP
European Patent Office
Prior art keywords
outlet opening
valve seat
valve
internal combustion
intake pipe
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.)
Expired - Lifetime
Application number
EP92111096A
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German (de)
English (en)
French (fr)
Other versions
EP0546247A1 (de
Inventor
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
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Publication date
Application filed by Carl Freudenberg KG filed Critical Carl Freudenberg KG
Publication of EP0546247A1 publication Critical patent/EP0546247A1/de
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Publication of EP0546247B1 publication Critical patent/EP0546247B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F02M25/0836—Arrangement of valves controlling the admission of fuel vapour to an engine, e.g. valve being disposed between fuel tank or absorption canister and intake manifold
    • 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 the volatile fuel components located in the free space of a tank system into the intake pipe of an internal combustion engine, comprising a vent line connecting the free space with the atmosphere, in which a storage chamber with an absorption element is arranged, and at least one the storage chamber with the intake pipe connecting line, which can be closed by an electromagnetically actuated valve, the valve having at least one inlet opening and at least one outlet opening, a main and an auxiliary valve seat being provided between the inlet and outlet opening, the auxiliary valve seat being closable by a vacuum adjuster and wherein the vacuum adjuster can be actuated by a differential pressure.
  • Such a device is known for example from EP 0 357 882 A2. It describes a method for checking the controllability of a tank ventilation valve, via which an additional air quantity loaded with fuel vapors can be fed to the intake area of an internal combustion engine.
  • the device and in particular the valve cannot be used in supercharged internal combustion engines. Due to the different pressures within the. Depending on the respective load conditions of the internal combustion engine Satisfactory performance properties are not achievable over the entire load range.
  • An internal combustion engine with a regenerable filter for fuel vapors is known from DE 38 32 500 A1.
  • the internal combustion engine is provided with a charger and has two identically designed valves which can be switched as a function of the pressure in the intake pipe.
  • the invention has for its object that the device can be used in conjunction with supercharged internal combustion engines, wherein large amounts of volatile fuel components should be disposed of as little flow as possible from the absorption element in the charger.
  • the device should be simple and inexpensive to manufacture, have compact dimensions and be characterized by good usage properties over a long period of use.
  • the valve has first and second outlet ports for use of the device in an internal combustion engine that is chargeable by a supercharger, the second outlet port being fluidly connected to the low pressure region of the charger and the first outlet port being fluidly connected to the intake pipe, wherein a check valve is assigned to the outlet openings, which can only be flowed through in the direction of the charger or the intake pipe, and the first outlet opening is connected downstream of the auxiliary valve seat and the second outlet opening is connected downstream of the main valve seat.
  • a supercharger in the sense of the present invention is to be understood as a compressor which can be formed, for example, by a turbocharger, a mechanically driven G-supercharger or a Roots blower.
  • the construction of the device according to the invention is very simple and complex switching devices that could interfere with reliable operation of the device are dispensable.
  • the device is characterized by a few components to be connected and the switchover from suction to charger operation takes place automatically. Thanks to the diaphragm pilot control, there is very good fine metering in the area close to idling during suction operation.
  • the design of the valve, the second outlet opening being connected only to the low-pressure region of the supercharger and the first outlet opening being connected only to the intake pipe, in the flow direction behind the throttle valve, requires good performance properties of the device.
  • the auxiliary valve seat is completely or almost closed by the vacuum adjuster in order to limit the flow of volatile fuel components into the area between the throttle valve and the internal combustion engine.
  • suction operation under partial load the feeding of volatile fuel components into the intake pipe is regulated by the vacuum adjuster, the vacuum adjuster being operable by a differential pressure between the atmosphere and the interior of the valve.
  • loader operation under partial load or full load when the maximum possible supply of volatile fuel components from the absorption element into the internal combustion engine is required and overpressure is present in the intake duct, the first check valve of the first exhaust opening closes automatically due to the pressure difference, so that a short circuit circuit through the valve is reliably avoided becomes.
  • the second outlet opening is open and the volatile fuel components and the fuel / air mixture are conveyed into the combustion chambers of the internal combustion engine with excess pressure.
  • the main valve seat is provided with an electrically actuable drive, the drive preferably being connected in a signal-conducting manner to a diagnostic block.
  • the diagnostic block has signal inputs and signal outputs that are required for monitoring the correct functioning of the device.
  • the input data can be formed, for example, by characteristic values which are available in any case for electronic engine management that is used. Irregularities within The device is displayed on a display instrument to monitor the device when an arbitrarily defined threshold value, which describes the tolerance between the actual value and the desired value, is exceeded.
  • first outlet opening is connected downstream of the auxiliary valve seat and the second outlet opening is connected to the main valve seat, it is advantageous that higher quantities of volatile fuel components can be disposed of from the absorption element by bypassing the vacuum adjuster in charging operation, since fewer throttle points are present.
  • the check valves within the outlet openings are preferably formed by conventional elastomer components.
  • the auxiliary valve seat can be closed by a vacuum adjuster made of elastomeric material and that the vacuum adjuster has a support collar which rests on the one hand on a bellows-shaped actuating membrane and on the other hand on a compression spring. Due to the rolling bellows-like design of the actuating membrane, stresses within the membrane that reduce service life are reliably avoided and the service life is increased. The design of the control membrane also requires a particularly sensitive regulation of the mass flow of volatile fuel components through the auxiliary valve seat.
  • the check valves are spring-loaded and can be actuated by differential pressure.
  • the check valves can be automatically engaged with a sealing seat arranged in the region of the outlet openings and thereby close the outlet openings.
  • the check valves can be formed, for example, by spring-loaded ball valves or by resiliently deformable tongue valves which, when not subjected to differential pressure, close the sealing seat under elastic pretension.
  • the vacuum adjuster can be effective against the spring force of a compression spring arranged in the valve. A good adaptation to the respective circumstances and the application is dependent on this configuration.
  • a valve which is constructed in the same way can be adapted comparatively easily to different internal combustion engines and tank systems by using compression springs with different spring characteristics.
  • the main valve seat can be provided with an electrically actuable drive, the drive being provided with electrical connections and the connections being connected in a signal-conducting manner to a diagnostic block.
  • the diagnostic block which can form part of a characteristic diagram of an engine control, controls the opening cross section of the main valve seat and thus the volume flow of volatile fuel components into the intake pipe of the internal combustion engine depending on the most varied input variables.
  • the diagnostic block can be connected, for example, to control instruments that can be integrated in the dashboard. If an arbitrarily defined threshold value, which describes the difference between the setpoint value and the actual value, is exceeded, visual and / or acoustic signals can draw attention to this maladministration.
  • the input signals of the diagnostic block can be formed, for example, by the position of the throttle valve, the speed of the internal combustion engine, various temperatures and pressures inside and outside the internal combustion engine and the exhaust gas composition. Further input and output variables are also conceivable.
  • the device according to the invention is explained in more detail below with reference to the drawings attached as an appendix.
  • the drawings represent only preferred exemplary embodiments and have only exemplary character.
  • FIG. 1 The device according to the invention is shown schematically in FIG. 1
  • FIG. 2 shows an exemplary embodiment of a valve which can be used in the device according to FIG. 1.
  • the device shown in FIG. 1 comprises an internal combustion engine 4 charged by a charger 16, a throttle valve 22, shown enlarged, being arranged in the intake pipe 3.
  • the air that is supplied to the internal combustion engine 4 is previously passed through an air filter 23.
  • the valve 10 is shown only schematically in FIG. 1 and in its outer contours. It has a first and a second outlet openings 12.1, 12.2 and an inlet opening 11, which are connected via a line 9 to the absorption element 8 in the storage chamber 7.
  • the volatile fuel components from the free space 1 of the tank system 2 reach the absorption element 8 via a ventilation line 6.
  • the volatile fuel components get out of the free space 1 and the absorption element 8 through line 9 into the valve 10.
  • the volatile fuel components flow through the first outlet opening 12.1 and are sucked in by the negative pressure in the intake pipe 3 of the internal combustion engine 4. In this case, the volatile fuel components are fed in in the direction of flow behind the throttle valve 22.
  • the first check valve 17 closes the passage and the volatile fuel components reach the first outlet opening 12.1 past the second check valve 18 of the second outlet opening 12.2 in the direction of the charger 16.
  • the volatile fuel components like the fuel / air mixture, are conveyed into the combustion chambers of the internal combustion engine 4 with overpressure.
  • the diagnostic block 21 and the display instrument 24 serve to monitor and control the device according to the invention. Depending on input variables, the passage of volatile fuel components through the main valve seat 13 is regulated by the drive 20, which is connected to the diagnostic block 21 in a signal-conducting manner.
  • valve 10 from the device according to the invention is shown enlarged as a single part in a section.
  • the valve 10 has a drive 20 for actuating the main valve.
  • the drive 20 is signal-conducting with a Diagnosis block, not shown here, is connected and regulates the flow depending on parameters entered in the diagnosis block.
  • the auxiliary valve is formed by a vacuum adjuster 15, which controls the flow through the auxiliary valve seat 14, operated by differential pressure.
  • a check valve 17, 18 is arranged in each of the two outlet openings 12.1, 12.2, the check valves in this exemplary embodiment being formed by elastically deformable tongue valves. Instead of these valves, it is also possible, for example, to use commercially available spring check ball valves. External switching of the check valves 17, 18 within the outlet openings 12.1, 12.2 is unnecessary with this configuration.
  • the auxiliary valve seat 14 is conical and, if necessary, can be brought into engagement with a conical closure member made of elastomeric material.
  • the device according to the invention is characterized by a simple structure, few individual parts and economical producibility. In addition, good performance characteristics of the device are ensured when used with an internal combustion engine charged by a supercharger for a long period of use.

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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)
EP92111096A 1991-12-04 1992-07-01 Vorrichtung zum dosierten Einspeisen flüchtiger Kraftstoffbestandteile in das Ansaugrohr einer Brennkraftmaschine Expired - Lifetime EP0546247B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4139946 1991-12-04
DE4139946A DE4139946C1 (enrdf_load_stackoverflow) 1991-12-04 1991-12-04

Publications (2)

Publication Number Publication Date
EP0546247A1 EP0546247A1 (de) 1993-06-16
EP0546247B1 true EP0546247B1 (de) 1995-04-05

Family

ID=6446233

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92111096A Expired - Lifetime EP0546247B1 (de) 1991-12-04 1992-07-01 Vorrichtung zum dosierten Einspeisen flüchtiger Kraftstoffbestandteile in das Ansaugrohr einer Brennkraftmaschine

Country Status (6)

Country Link
US (1) US5269278A (enrdf_load_stackoverflow)
EP (1) EP0546247B1 (enrdf_load_stackoverflow)
JP (1) JPH05263720A (enrdf_load_stackoverflow)
BR (1) BR9204626A (enrdf_load_stackoverflow)
CA (1) CA2079520A1 (enrdf_load_stackoverflow)
DE (2) DE4139946C1 (enrdf_load_stackoverflow)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4225993C1 (de) * 1992-08-06 1994-01-13 Freudenberg Carl Fa Vorrichtung zum vorübergehenden Speichern und dosierten Einspeisen der im Freiraum einer Tankanlage befindlichen flüchtigen Kraftstoffbestandteile in das Ansaugrohr einer Verbrennungskraftmaschine
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
JP2651782B2 (ja) * 1993-05-21 1997-09-10 京三電機株式会社 燃料タンクとインマニ間に配置される電磁弁
DE19611886A1 (de) * 1996-03-26 1997-10-02 Bosch Gmbh Robert Magnetventil
DE19721562A1 (de) * 1997-05-23 1998-11-26 Bosch Gmbh Robert Ventil zum dosierten Einleiten von verflüchtigtem Brennstoff
JP3338644B2 (ja) * 1997-12-09 2002-10-28 株式会社ユニシアジェックス 内燃機関の蒸発燃料処理装置
DE10236387A1 (de) * 2002-08-08 2004-02-19 Robert Bosch Gmbh Vorrichtung zum dosierten Zumischen von verflüchtigtem Kraftstoff in ein Ansaugrohr einer Brennkraftmaschine
WO2006072633A1 (en) * 2005-01-10 2006-07-13 Inergy Automotive Systems Research (Société Anonyme) Electronically controlled electromechanical valve
JP4304513B2 (ja) * 2005-06-02 2009-07-29 株式会社デンソー エバポガスパージシステムの異常診断装置
DE102006016339B4 (de) * 2006-04-05 2017-02-23 Robert Bosch Gmbh Verfahren zur Diagnose einer Tankentlüftungsanlage und Vorrichtung zur Durchführung des Verfahrens
DE102009011155B4 (de) * 2009-02-25 2012-08-09 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Vorrichtung zur Tankentlüftung
US7810475B2 (en) * 2009-03-06 2010-10-12 Ford Global Technologies, Llc Fuel vapor purging diagnostics
DE102009014444A1 (de) * 2009-03-23 2010-10-07 Continental Automotive Gmbh Tankentlüftungsvorrichtung für eine aufgeladene Brennkraftmaschine und zugehöriges Steuerverfahren
DE102010006123A1 (de) * 2010-01-29 2011-08-04 Dr. Ing. h.c. F. Porsche Aktiengesellschaft, 70435 Kraftfahrzeug
DE112011101201B4 (de) * 2010-04-05 2017-03-30 Stoneridge, Inc. Drei-Wege-Ventil
DE102011054851A1 (de) * 2011-10-27 2013-05-02 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Tankentlüftung mit Venturi-Düse
DE112012005308T5 (de) * 2011-12-19 2014-10-02 Continental Automotive Systems, Inc. Turbo-Spülmodul für turboaufgeladene Fahrzeuge
US9388774B2 (en) * 2013-03-01 2016-07-12 Discovery Technology International, Inc. Precision purge valve system with pressure assistance
DE102014210508A1 (de) * 2014-06-03 2015-12-03 Bayerische Motoren Werke Aktiengesellschaft Aufgeladene Brennkraftmaschine

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JPS58110853A (ja) * 1981-12-25 1983-07-01 Honda Motor Co Ltd 過給機付内燃機関における蒸発燃料制御装置
JPS59136554A (ja) * 1983-01-25 1984-08-06 Nissan Motor Co Ltd 過給機付内燃機関の蒸発燃料制御装置
JPS6023499U (ja) * 1983-07-26 1985-02-18 三菱重工業株式会社 船体の前進装置
JPH0726573B2 (ja) * 1985-12-11 1995-03-29 富士重工業株式会社 自動車用エンジンの空燃比制御装置
US4703737A (en) * 1986-07-31 1987-11-03 Bendix Electronics Limited Vapor control valve and system therefor
DE3832500A1 (de) * 1987-10-03 1989-04-13 Volkswagen Ag Brennkraftmaschine mit regenerierbarem filter fuer kraftstoffdaempfe
DE3830722A1 (de) * 1988-09-09 1990-03-15 Freudenberg Carl Fa Vorrichtung zum dosierten einspeisen fluechtiger 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
JPH0646017B2 (ja) * 1989-07-14 1994-06-15 株式会社日立製作所 内燃機関の制御装置
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US5183022A (en) * 1991-07-16 1993-02-02 Siemens Automotive Limited Multi-slope canister purge solenoid valve
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Also Published As

Publication number Publication date
JPH05263720A (ja) 1993-10-12
US5269278A (en) 1993-12-14
BR9204626A (pt) 1993-06-08
DE59201839D1 (de) 1995-05-11
EP0546247A1 (de) 1993-06-16
DE4139946C1 (enrdf_load_stackoverflow) 1993-02-04
CA2079520A1 (en) 1993-06-05

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