EP0585527A1 - Dispositif pour l'alimentation temporaire de carburant évaporé d'un espace libre d'un réservoir dans la tubulure d'admission d'un motor à combustion interne - Google Patents

Dispositif pour l'alimentation temporaire de carburant évaporé d'un espace libre d'un réservoir dans la tubulure d'admission d'un motor à combustion interne Download PDF

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Publication number
EP0585527A1
EP0585527A1 EP93107112A EP93107112A EP0585527A1 EP 0585527 A1 EP0585527 A1 EP 0585527A1 EP 93107112 A EP93107112 A EP 93107112A EP 93107112 A EP93107112 A EP 93107112A EP 0585527 A1 EP0585527 A1 EP 0585527A1
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EP
European Patent Office
Prior art keywords
section
opening cross
valve
nozzle
valve seat
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
EP93107112A
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German (de)
English (en)
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EP0585527B1 (fr
Inventor
Andreas Sausner
Sebastian Zabeck
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Carl Freudenberg KG
Original Assignee
Carl Freudenberg KG
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Publication date
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Application filed by Carl Freudenberg KG filed Critical Carl Freudenberg KG
Publication of EP0585527A1 publication Critical patent/EP0585527A1/fr
Application granted granted Critical
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Anticipated expiration legal-status Critical
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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
    • 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

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, comprising a vent line connecting the free space with the atmosphere, in which a storage chamber with an absorption element is arranged, as well as 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 and at least one outlet opening and a valve seat being provided between the inlet and the outlet opening, which can be closed if necessary by a closing member .
  • Such a device is known from DE-PS 38 02 664.
  • An auxiliary valve with a control chamber which can be closed by a vacuum adjuster, is additionally arranged between the electromagnetically actuated valve and the intake pipe.
  • the auxiliary valve is immediately connected in series to the shut-off valve.
  • the auxiliary valve includes a vacuum adjuster, which is composed of a rubber-elastic actuating diaphragm and a compression spring, the auxiliary valve having a separate closing element, which rests on the one hand with a support collar on the actuating membrane and on the other hand on the compression spring.
  • a vacuum adjuster which is composed of a rubber-elastic actuating diaphragm and a compression spring, the auxiliary valve having a separate closing element, which rests on the one hand with a support collar on the actuating membrane and on the other hand on the compression spring.
  • the invention has for its object to develop a device of the type mentioned in such a way that there is a significantly simplified structure, that the device is cheaper to manufacture in terms of production technology and economy and that reliable and good performance characteristics result over a long period of use.
  • the line is closed exclusively by the electromagnetically actuated valve, that the valve seat forms the axial boundary of a tubular nozzle, that the nozzle has a first opening cross section in the region of the valve seat , which tapers in the flow direction immediately behind the valve seat to a second opening cross-section and that the second opening cross-section on the side facing away from the valve seat is widened in the region of the axial termination of the nozzle to a third opening cross-section which is larger than the first opening cross-section.
  • the nozzle which can have the shape of a Laval nozzle, on the one hand enables good disposal, ie regeneration of the absorption element, at high speeds in the partial and full load range.
  • a high mass flow of the volatile fuel components is fed to the fuel-air mixture of the mixture preparation and is conveyed together with this into the combustion chambers of the internal combustion engine.
  • the shape of the nozzle requires a comparatively high flow rate, so that there is only little flow resistance to the throughput. Due to the favorable design of the nozzle in terms of flow technology, the valve seat can have a comparatively small opening cross section, which requires low actuation forces of the valve.
  • this configuration benefits the regeneration of the absorption element in the area close to idling. Due to the comparatively small opening cross-section of the valve seat and the resulting comparatively low actuation forces of the valve, this can be kept in the closed position for a longer period of time when actuated, so that over-greasing of the fuel / air mixture can be reliably avoided despite regeneration of the absorption element in the idling range.
  • the connections for actuating the valve can be connected to a diagnostic block.
  • the diagnostic block which can form part of a map of an engine control, for example, controls the actuation of the valve and thus the volumetric flow of volatile fuel components into the intake pipe of the internal combustion engine depending on the respective load condition, depending on various input variables.
  • the electromagnetically actuated valve can, for example, be controlled in a clocked manner and, depending on the pulse duty factor, releases different dosing quantities.
  • the duty cycle is understood to mean the relationship between the period of the open valve and the total period, that is to say the period of the open and the closed valve.
  • the diagnostic block can be connected to a control instrument, for example. If one is exceeded arbitrarily
  • the defined threshold value which describes the difference between the setpoint value and the actual value of the mass flow that is being passed through, can be used by visual and / or acoustic signals to alert the operator of the internal combustion engine to functional errors.
  • 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. Additional input and output variables are also conceivable.
  • first and the second opening cross-section are of the same size, the properties of use deteriorate from a fluidic point of view.
  • the first opening cross section and the inlet opening can be arranged in a first plane and / or the third opening cross section can be arranged with the outlet opening in a second plane.
  • the differential pressure due to the almost fully open throttle valve is comparatively low, low flow losses are required in order to ensure good disposal of the absorption element.
  • the first opening cross section preferably has a diameter that is 2 to 8 times, preferably 4 times larger than the stroke of the closing member. A good passage of the volatile fuel constituents through the device is effected at the same time with the smallest possible travel, so that the dynamic range of the electromagnetically adjustable valve is particularly broadband.
  • FIG. 1 An overall overview is shown in FIG. 1, in which the individual parts used are shown in a schematic representation.
  • FIG. 2 shows the electromagnetically actuated valve from FIG. 1.
  • FIG. 3 shows a diagram in which the flow of the volatile fuel components through the device is plotted against the differential pressure which corresponds to the different load ranges of the internal combustion engine.
  • the device shown in FIG. 1 comprises an internal combustion engine 4 with an intake pipe 3, a throttle valve 20, shown enlarged, being arranged within the intake pipe 3.
  • the air filter of the internal combustion engine 4 is provided with the reference number 19.
  • the mixture preparation system is not shown in this figure to simplify the structure. It can consist, for example, of a carburetor or an injection system, which can be controlled via the diagnostic block 21, which can form part of an engine control.
  • the electromagnetically actuated valve 10 is shown only schematically in FIG. 1 and in its outer contours. It has an outlet opening 12 and an inlet opening 11, which is connected via a line 9 to the absorption element 8 of the storage chamber 7.
  • the volatile fuel components from the free space 1 of the tank system 2 reach the storage chamber 7 via a ventilation line 6 and are absorbed by the absorption element 8, which is designed as an activated carbon filter.
  • the line is closed exclusively by the electromagnetically actuated valve 10, which means that a simple construction is required.
  • the volatile fuel components flow through the valve 10, which is dependent on the respective load state of the internal combustion engine is driven differently clocked.
  • the fuel components are drawn in by the negative pressure in the intake pipe 3 of the internal combustion engine 4.
  • the volatile fuel components are fed in in the flow direction 16 behind the throttle valve 20.
  • the diagnostic block 21 and the display instrument 22 serve to monitor and control the device according to the invention.
  • the passage of volatile fuel components into the internal combustion engine 4 is regulated depending on input variables, such as the position of the throttle valve 20, the speed of the internal combustion engine 4 and / or the exhaust gas composition.
  • a sensor can be provided to determine the volatile fuel constituents that have penetrated into the intake pipe, and is arranged in the area of the entry point behind the throttle valve 20.
  • FIG. 2 shows an embodiment of the valve 10 from the device according to FIG. 1 as an individual part, enlarged in a section.
  • the valve 10 has an electric drive 23, which is connected in a signal-conducting manner to a diagnostic block, not shown here.
  • the drive 23 regulates the flow, depending on parameters entered in the diagnostic block.
  • the device can only be closed by the valve 10, a nozzle 14 being arranged within the housing 24 of the valve 10, which nozzle, starting from the valve seat 13, which forms a first opening cross section 15, flows in the flow direction 16 directly behind the valve seat 13 Opening cross section 17 tapers, the second opening cross section increasing conically in the direction of flow in the direction of the third opening cross section 18.
  • the cone angle, which the boundary wall of the nozzle 14 encloses with the axis of the nozzle 10, is 4 ° in this exemplary embodiment.
  • the second opening cross section 17 is in the axial direction from the valve seat 13 preferably arranged within the first third of the axial extent of the nozzle.
  • FIG. 3 shows a diagram in which the mass flow ⁇ is plotted on the ordinate and the pressure difference ⁇ p is plotted on the abscissa. At the intersection of the two axes, the flow ⁇ is zero, as is the differential pressure ⁇ p. Starting from the zero point of the abscissa to the right, the differential pressures of the negative pressure are shown during the intended use of the internal combustion engine 4.
  • the illustration is a schematic sketch to make the relationships between the respective configurations of the valves clear. Numerical values cannot be derived from the representations.
  • the abscissa to the right of the intersection of the two axes is divided into three areas 29, 30, 31, which symbolize the operating states of the internal combustion engine 4.
  • Area 29 is the no-load area
  • area 30 is the partial load area
  • area 31 is the full load area.
  • the characteristic curves of a valve which is designed similarly to the valve from FIG. 2, but has a nozzle with a cylindrical cross section, are designated by the reference numerals 24 and 25.
  • the characteristic curves of the valve 10 according to the invention shown in FIG. 2 have the reference numbers 26 and 27.
  • characteristic curve 28 The operating behavior of the prior art according to DE-PS 32 02 664 and DE-PS 41 00 659, which has an additional secondary valve seat in addition to the main valve seat, is described by characteristic curve 28.
  • a valve with a cylindrical nozzle has the disadvantages that it is only with a view to maximum disposal of the Absorption element can be operated in full load operation without idle regeneration, since with large opening cross-sections and fully open valve, as shown by characteristic curve 24, the fuel / air mixture would be over-rich in idle operation.
  • Characteristic curve 25 shows the smallest possible dosing quantity when the valve is actuated in cycles. It can be seen that the mass flow rate ⁇ in the idling range 29 is significantly larger in comparison to the characteristic curves 27 and 28, which indicates an undesirable over-greasing in idling.
  • the valve known from the prior art which consists of an auxiliary valve seat and a main valve seat, has a characteristic curve which is provided with reference number 28.
  • the valve can be almost closed by the vacuum adjuster in order to limit the mass flow ⁇ of volatile fuel components in the area between throttle valve 20 and internal combustion engine 4.
  • the comparatively complicated structure ensures, on the one hand, a sensitive metering of the volatile fuel components into the internal combustion engine in the area 29 close to idling, and on the other hand a comparatively high mass throughput ⁇ at part-load operation 30 and full load 31.
  • the valve 10 according to the invention has a mass flow rate in the fully open state (characteristic curve 26), which is only slightly below the mass flow rate of a cylindrical nozzle with a large opening cross section. Due to the reduced flow losses, the high mass throughput is maintained well into the full load range. With clocked activation of the valve for sensitive metering of the volatile fuel components in operation 29 near idling, the characteristic curve shown with reference number 27 is reached.
  • valve according to FIG. 2 which has a very simple construction and is economical to produce economically, achieves excellent usage properties both with regard to the maximum throughput when the valve is fully open and with sensitive metering in the region 29 close to idling can be.

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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)
  • Feeding And Controlling Fuel (AREA)
  • Fuel-Injection Apparatus (AREA)
EP93107112A 1992-09-01 1993-05-03 Dispositif pour l'alimentation temporaire de carburant évaporé d'un espace libre d'un réservoir dans la tubulure d'admission d'un motor à combustion interne Expired - Lifetime EP0585527B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4229110 1992-09-01
DE4229110A DE4229110C1 (de) 1992-09-01 1992-09-01 Vorrichtung zum vorübergehenden Speichern und dosierten Einspeisen von im Freiraum einer Tankanlage befindlichen flüchtigen Kraftstoffbestandteilen in das Ansaugrohr einer Verbrennungskraftmaschine
US08/115,375 US5460137A (en) 1992-09-01 1993-09-01 Apparatus for the temporary storage and controlled feeding of volatile fuel components to an internal combustion engine

Publications (2)

Publication Number Publication Date
EP0585527A1 true EP0585527A1 (fr) 1994-03-09
EP0585527B1 EP0585527B1 (fr) 1995-07-26

Family

ID=25918100

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93107112A Expired - Lifetime EP0585527B1 (fr) 1992-09-01 1993-05-03 Dispositif pour l'alimentation temporaire de carburant évaporé d'un espace libre d'un réservoir dans la tubulure d'admission d'un motor à combustion interne

Country Status (7)

Country Link
US (1) US5460137A (fr)
EP (1) EP0585527B1 (fr)
JP (1) JP2528256B2 (fr)
BR (1) BR9303260A (fr)
CA (1) CA2105363C (fr)
DE (2) DE4229110C1 (fr)
ES (1) ES2076045T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0628137B1 (fr) * 1992-12-24 1997-03-19 Robert Bosch Gmbh Soupape pour l'injection de doses de carburant vaporise dans une conduite d'admission d'un moteur a combustion interne
EP0864741A3 (fr) * 1997-03-11 1998-09-30 Pierburg Aktiengesellschaft Dispositif pour rincer un filtre à charbon actif et pour tester l'étanchéité d'une instllation de réservoir à carburant pour moteur de véhicule connectée à ce filtre
EP0969198A2 (fr) 1998-07-02 2000-01-05 Pierburg Aktiengesellschaft Dispositif pour rincer un filtre à charbon actif et pour tester l'étanchéité d'une installation de réservoir à carburant pour moteur de véhicule connectée à ce filtre

Families Citing this family (16)

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Publication number Priority date Publication date Assignee Title
DE19721562A1 (de) 1997-05-23 1998-11-26 Bosch Gmbh Robert Ventil zum dosierten Einleiten von verflüchtigtem Brennstoff
US6205982B1 (en) * 1998-05-15 2001-03-27 Chrysler Corporation Proportional purge solenoid control system
US5893354A (en) * 1998-09-16 1999-04-13 Eaton Corporation Method of controlling fuel vapor canister purge flow and vapor management valve therefor
DE19901090A1 (de) * 1999-01-14 2000-07-20 Bosch Gmbh Robert Ventil zum dosierten Einleiten von verflüchtigtem Brennstoff
WO2000077427A2 (fr) * 1999-06-14 2000-12-21 Siemens Canada Limited Robinet de purge de carter pour flux d'air a forte regeneration
US6666192B2 (en) 2001-11-14 2003-12-23 Delphi Technologies, Inc. Fluid control valve and system
DE10156232B4 (de) * 2001-11-15 2006-07-13 Carl Freudenberg Kg Ventil
DE10156231C1 (de) * 2001-11-15 2003-04-30 Freudenberg Carl Kg Ventil
DE10222218A1 (de) * 2002-05-16 2003-12-04 Freudenberg Carl Kg Magnetventil
DE102008030089A1 (de) 2008-06-25 2010-01-07 Continental Automotive Gmbh Verfahren und Vorrichtung zum Steuern einer Tankentlüftungsvorrichtung für ein Kraftfahrzeug
GB0811888D0 (en) * 2008-06-30 2008-07-30 Goodrich Control Sys Ltd Control system
US7886727B2 (en) * 2009-05-26 2011-02-15 Ford Global Technologies, Llc Variable venturi system and method for engine
KR101197453B1 (ko) * 2010-09-29 2012-11-05 현대자동차주식회사 증발가스 제어 가능한 하이브리드 차량의 연료탱크 밸브 구조
JP6176215B2 (ja) * 2014-09-25 2017-08-09 株式会社デンソー 二段切替弁
US20160326991A1 (en) * 2015-05-06 2016-11-10 Hyundai Motor Company Purge control solenoid valve
KR102463193B1 (ko) * 2017-12-19 2022-11-03 현대자동차 주식회사 퍼지 제어 솔레노이드 밸브

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EP0043256A1 (fr) * 1980-07-01 1982-01-06 Tohoku Mikuni Kogyo Company Limited Vanne de contrôle proportionnelle pour gaz et système de contrôle proportionnel comprenant cette vanne
EP0099771A1 (fr) * 1982-07-21 1984-02-01 Solex Electrovanne à obturateur plastique
JPS6226358A (ja) * 1985-07-26 1987-02-04 Honda Motor Co Ltd 蒸発燃料還元装置
DE3802664C1 (fr) * 1988-01-29 1988-10-13 Fa. Carl Freudenberg, 6940 Weinheim, De
US4830333A (en) * 1988-09-02 1989-05-16 General Motors Corporation Solenoid valve
WO1992001862A1 (fr) * 1990-07-20 1992-02-06 Robert Bosch Gmbh Soupape de melange, en quantites dosees, d'un carburant volatilise a un melange air-carburant d'un moteur a combustion interne

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DE4035158C1 (fr) * 1990-11-06 1992-01-09 Fa. Carl Freudenberg, 6940 Weinheim, De
DE4035176C3 (de) * 1990-11-06 1997-11-13 Freudenberg Carl Fa Vorrichtung zum dosierten Einspeisen von verbrannten Gasen in den Brennraum einer Verbrennungskraftmaschine
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EP0043256A1 (fr) * 1980-07-01 1982-01-06 Tohoku Mikuni Kogyo Company Limited Vanne de contrôle proportionnelle pour gaz et système de contrôle proportionnel comprenant cette vanne
EP0099771A1 (fr) * 1982-07-21 1984-02-01 Solex Electrovanne à obturateur plastique
JPS6226358A (ja) * 1985-07-26 1987-02-04 Honda Motor Co Ltd 蒸発燃料還元装置
DE3802664C1 (fr) * 1988-01-29 1988-10-13 Fa. Carl Freudenberg, 6940 Weinheim, De
US4830333A (en) * 1988-09-02 1989-05-16 General Motors Corporation Solenoid valve
WO1992001862A1 (fr) * 1990-07-20 1992-02-06 Robert Bosch Gmbh Soupape de melange, en quantites dosees, d'un carburant volatilise a un melange air-carburant d'un moteur a combustion interne

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0628137B1 (fr) * 1992-12-24 1997-03-19 Robert Bosch Gmbh Soupape pour l'injection de doses de carburant vaporise dans une conduite d'admission d'un moteur a combustion interne
EP0864741A3 (fr) * 1997-03-11 1998-09-30 Pierburg Aktiengesellschaft Dispositif pour rincer un filtre à charbon actif et pour tester l'étanchéité d'une instllation de réservoir à carburant pour moteur de véhicule connectée à ce filtre
EP0969198A2 (fr) 1998-07-02 2000-01-05 Pierburg Aktiengesellschaft Dispositif pour rincer un filtre à charbon actif et pour tester l'étanchéité d'une installation de réservoir à carburant pour moteur de véhicule connectée à ce filtre

Also Published As

Publication number Publication date
US5460137A (en) 1995-10-24
EP0585527B1 (fr) 1995-07-26
DE4229110C1 (de) 1993-10-07
DE59300407D1 (de) 1995-08-31
CA2105363A1 (fr) 1994-03-02
JP2528256B2 (ja) 1996-08-28
BR9303260A (pt) 1994-03-22
JPH06159165A (ja) 1994-06-07
CA2105363C (fr) 1999-12-28
ES2076045T3 (es) 1995-10-16

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