EP2861861B1 - Spülventil für kraftstoffdampfsammelbehälter mit integriertem unterdruckerzeuger und rückschlagventilen - Google Patents

Spülventil für kraftstoffdampfsammelbehälter mit integriertem unterdruckerzeuger und rückschlagventilen Download PDF

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Publication number
EP2861861B1
EP2861861B1 EP12740241.0A EP12740241A EP2861861B1 EP 2861861 B1 EP2861861 B1 EP 2861861B1 EP 12740241 A EP12740241 A EP 12740241A EP 2861861 B1 EP2861861 B1 EP 2861861B1
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EP
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Prior art keywords
valve
vacuum generator
check valve
vacuum
intake manifold
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EP12740241.0A
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English (en)
French (fr)
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EP2861861A1 (de
Inventor
Benjamin Dominick Manton Williams
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Continental Automotive Systems Inc
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Continental Automotive Systems Inc
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    • 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

  • This invention relates to a vehicle canister purge system for turbocharged engines and, more particularly, to a canister purge valve with integrated vacuum generator and check valves.
  • a venturi tube or nozzle is used to generate a vacuum on a turbocharged vehicle engine by scavenging from the pressure differential across the turbo (14 psi or more) to drive air through the a venturi nozzle from the turbocharger outlet and back into the turbocharger inlet.
  • the high velocity airflow and sonic shock waves in the venturi nozzle generate a pressure lower than atmospheric (vacuum) which is used to draw purge air flow into the scavenged turbo loop.
  • this conventional venturi and scavenging loop is an isolated loop of plumbing, requiring a tube from the vacuum port on the venturi nozzle to a port on the purge valve.
  • the purge valve is protected from purge loss during naturally aspirated conditions and from turbo pressures by a check valve located between the venturi nozzle and the purge valve, and another check valve located between the intake manifold and the purge valve respectively.
  • JP 63 162 965 U discloses a system for purging of a canister, the system comprising a first check valve, a second check valve and a vacuum generator for defining a scavenging air flow loop from a turbocharger outlet through the vacuum generator to the turbocharger inlet.
  • the system is constructed and arranged such that when the turbocharger is operating and the intake manifold is under positive pressure, the second check valve closes, while the first check valve opens upon the vacuum generator generating a first vacuum, to permit the purge flow to be drawn into a scavenging air flow loop, and in a naturally aspirated condition, the manifold vacuum closes the first check valve and opens the second check valve to divert all of the purge flow to the intake manifold.
  • DE102009024697 A1 discloses a device for supplying volatile fuel components into an intake system of an internal combustion engine of a motor vehicle.
  • the device comprises a temporary storage for collecting the volatile fuel components, the storage being connected with an intake system of the internal combustion engine by means of a double check valve, based on a switching condition of the double check valve.
  • An object of the invention is to fulfill the need referred to above.
  • this objective is achieved by providing an integrated canister purge valve for a turbocharged vehicle engine.
  • the valve includes a valve member having a housing and is constructed and arranged to control vapor purge flow from a fuel tank and canister structure to an air intake manifold.
  • a body is coupled to the housing. The body defines an interior space. Structure separates the interior space into a first chamber and a second chamber.
  • the first chamber has an inlet port and an outlet port.
  • a vacuum generator is provided in the first chamber and is in fluid communication with the inlet and outlet ports.
  • the vacuum generator is constructed and arranged to receive air from a turbocharger outlet, via the inlet port, to create a first vacuum when the air passes through the vacuum generator, and to direct air to an inlet of the turbocharger, via the outlet port, to define a scavenging air flow loop.
  • a first check valve is provided in the first chamber between the vacuum generator and the valve member, and a second check valve is provided in the second chamber between the valve member and an manifold outlet port.
  • the manifold outlet port is constructed and arranged to be coupled to an intake manifold.
  • the first and second check valves are constructed and arranged such that 1) when the turbocharger is operating and the intake manifold is under positive pressure, the second check valve closes, while the first check valve opens upon the vacuum generator generating the first vacuum, to permit the purge flow to be drawn into the scavenging air flow loop and 2) in a naturally aspirated condition, manifold vacuum closes the first check valve and opens the second check valve to divert all of the purge flow through the manifold outlet port and to the intake manifold.
  • a method of controlling vapor purge flow in turbocharged vehicle provides a canister purge valve having a valve member constructed and arranged to control vapor purge flow from a fuel tank and canister structure to an air intake manifold.
  • the purge valve has an integral vacuum generator and first and second check valves that are integral with the canister purge valve.
  • the first check valve is disposed between the vacuum generator and the valve member and the second check valve is disposed between the valve member and a manifold outlet port, the manifold outlet port being coupled to the intake manifold.
  • the method defines a scavenging air flow loop from a turbocharger outlet through the vacuum generator and to an inlet of the turbocharger, with the vacuum generator generating a first vacuum due to the air flow there-trough,
  • the method ensures that the second check valve closes, while the first check valve opens upon the vacuum generator generating the first vacuum, to permit vapor purge flow to be drawn through the valve member into the scavenging air flow loop.
  • the method ensures that vacuum created by the intake manifold closes the first check valve and opens the second check valve to divert all of the purge flow through the manifold outlet port and to the intake manifold.
  • an integrated canister purge valve for a turbocharged vehicle engine is shown, generally indicated at 10, in accordance with an embodiment.
  • the integrated canister purge valve 10 incorporates both a vacuum generator 12 and two check valves 36, 38 in one small package, reducing the number of plumbing connections in the system from a possible twelve to just four connections.
  • the integration is accomplished by including a venturi tube 12 (as the vacuum generator) in the lower body 14 of the canister purge valve 10.
  • the lower body 14 defines an interior space 15.
  • Structure, such as a wall 16 and welded middle cap member 18 separate the interior space 15 of the lower body 14 into two chambers 20, 22.
  • the first chamber 20 has an inlet port 21 and an outlet port 23.
  • the vacuum generator or venturi tube 12 is in the first chamber 20 and is in fluid communication with the inlet port 21 and outlet port 23.
  • the vacuum generator is constructed and arranged to receive air from the outlet 25 of the turbocharger 26, via the inlet port 21, to create a first vacuum when the air passes through the venturi tube 12, and to direct air to an inlet 27 of the turbocharger 26, via the outlet port 23, to define a scavenging flow loop A, so that venturi driven purge flow B can be drawn into the scavenging flow loop A, as explained more fully below.
  • Main intake airflow is shown by arrow C.
  • Chamber 22 has a manifold outlet port 28 (see FIG. 2 ) that communicates with an inlet port 30 of an intake manifold 32 associated with an engine (not shown).
  • chamber 20 is associated with vacuum generated by the venturi tube 12 and chamber 22 is associated with vacuum generated by the intake manifold 32.
  • first and second check valves 36, 38 respectively, that are integral with the valve 10 and are disposed in the lower body 14.
  • first check valve 36 is provided between valve member 34 of the canister purge valve 10 and the venturi tube 12
  • second check valve 38 is provided between the valve member 34 and the intake manifold 32.
  • the valve member 34 is disposed between the fuel tank and canister structure 35 and the intake manifold 32.
  • the valve member 34 may be of any conventional configuration, such as the solenoid type disclosed in U.S. Patent Publication 20080000456 A1 , the content of which is hereby incorporated by reference into this specification.
  • the lower body 14 and a housing 33 of the valve member 34 are preferably joined in a removable manner by a snap-fit and arrangement 37, with an O-ring therebetween.
  • the lower body 14 and housing 33 can be joined by a weld connection, which eliminates the O-ring.
  • the manifold 32 is under positive pressure and the check valve 38, associated with the manifold port 30, closes.
  • the vacuum generated by the scavenging flow loop A pulls the check valve 36 open, permitting flow through the scavenging flow loop A that draws in vapor purge flow B that passes the valve member 34.
  • the purge flow is then directed to the manifold 32 and thus to the engine to be consumed.
  • the vacuum created at the manifold 32 pulls the check valve 38 open, thus permitting flow to pass from the valve member 34 to the manifold 32.
  • the manifold vacuum pulls the check valve 36 shut, diverting all purge flow directly to the manifold 32 to be consumed in the engine.
  • each one-way check valve 36, 38 has a valve member 40 mounted in a free-floating manner to an opening 41 housing 42.
  • two openings 44 are provided in the housing 42 under the valve member 40. It can be appreciated that openings 44 need not be provided if opening 41 is sufficient to provide proper flow through the valve.
  • the valve member 40 is movable due to pressure differences thereon. The valve member 40 is shown in a closed position in FIG. 3 , sealed against the housing 42 and preventing air from flowing past the openings 41 and 44. Vacuum pressure, as mentioned above can pull the valve member 40 open (in the direction of arrow D), permitting air flow through the openings 41, 44.
  • the integrated canister purge valve 10 provides inline connections in a compact device. Since the venturi tube and check valves are integrated in the purge valve, fewer plumbing connections are required, which also simplifies assembly.

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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)

Claims (11)

  1. Integriertes Kraftstoffdampfsammelbehälter-Spülventil (10) für einen turboaufgeladenen Fahrzeugmotor, wobei das Ventil Folgendes aufweist: ein erstes Rückschlagventil (36), ein zweites Rückschlagventil (38) und einen Unterdruckerzeuger (12), wobei das erste (36) und das zweite (38) Rückschlagventil so ausgeführt und angeordnet sind, dass 1) wenn ein Turbolader (26) in Betrieb ist und ein Lufteinlasskrümmer (32) unter Überdruck steht, sich bei Erzeugung eines ersten Unterdrucks durch den Unterdruckerzeuger (12) das zweite Rückschlagventil (38) schließt, während sich das erste Rückschlagventil (36) öffnet, um das Ansaugen von Spülstrom in einen Spülluftkreislauf (A) zu gestatten, und 2) in einem selbstansaugenden Zustand, Krümmerunterdruck das erste Rückschlagventil (36) schließt und das zweite Rückschlagventil (38) öffnet, um sämtlichen Spülstrom durch einen Krümmerauslasskanal (28) zum Einlasskrümmer (32) umzuleiten, gekennzeichnet
    dadurch, dass ein Ventilglied (34) ein Gehäuse (33) aufweist und dazu ausgeführt und angeordnet ist, Dampfspülstrom von einer Kraftstofftank- und -dampfsammelbehälterstruktur (35) zum Lufteinlasskrümmer (32) zu steuern,
    durch einen an das Gehäuse (33) gekoppelten Körper (14), wobei der Körper (14) einen Innenraum (15) definiert,
    durch eine Struktur, die den Innenraum (15) in eine erste Kammer (20) und eine zweite Kammer (22), die von der ersten Kammer (20) getrennt ist, unterteilt, wobei die erste Kammer (20) einen Einlasskanal (21) und einen Auslasskanal (23) aufweist,
    durch den Unterdruckerzeuger (12) in der ersten Kammer (20), der mit dem Einlasskanal (21) und dem Auslasskanal (23) in fluidischer Verbindung steht, wobei der Unterdruckerzeuger (12) dazu ausgeführt und angeordnet ist, Luft über den Einlasskanal (21) von einem Turboladerauslass (25) zu empfangen, um einen ersten Unterdruck zu erzeugen, wenn die Luft den Unterdruckerzeuger (12) durchströmt, und Luft über den Auslasskanal (23) zu einem Einlass (27) des Turboladers (26) zu leiten, um einen Spülluftkreislauf (A) zu definieren,
    durch das erste Rückschlagventil (36) in der ersten Kammer (20) zwischen dem Unterdruckerzeuger (12) und dem Ventilglied (34) und
    durch das zweite Rückschlagventil (38) in der zweiten Kammer (22) zwischen dem Ventilglied (34) und einem Krümmerauslasskanal (28), wobei der Krümmerauslasskanal (28) dazu ausgeführt und angeordnet ist, an den Einlasskrümmer (32) gekoppelt zu werden.
  2. Ventil nach Anspruch 1, wobei der Unterdruckerzeuger (12) ein Venturi-Rohr (12) ist.
  3. Ventil nach Anspruch 1, in Kombination mit der Kraftstofftank- und -dampfsammelbehälterstruktur (35), dem Turbolader (26) und dem Einlasskrümmer (32).
  4. Ventil nach Anspruch 1, wobei die den Innenraum (15) trennende Struktur eine Wand (16) und ein Kappenglied (18) umfasst.
  5. Ventil nach Anspruch 1, wobei jedes der Rückschlagventile (36, 38) ein Einwegventil mit einem elastomeren Ventilglied (40) ist, das dazu ausgeführt und angeordnet ist, sich basierend auf Druckdifferenzen daran zwischen der geöffneten und geschlossenen Stellung zu bewegen.
  6. Ventil nach Anspruch 1, wobei das Gehäuse (33) und der Körper (14) lösbar aneinander gekoppelt sind.
  7. Verfahren zum Steuern von Dampfspülstrom in einem turboaufgeladenen Fahrzeug, wobei das Verfahren Folgendes aufweist:
    Bereitstellen eines Kraftstoffdampfsammelbehälter-Spülventils (10) mit einem Ventilglied (34), das dazu ausgeführt und angeordnet ist, Dampfspülstrom von einer Kraftstofftank- und -dampfsammelbehälterstruktur (35) zu einem Lufteinlasskrümmer (32) zu steuern, wobei das Kraftstoffdampfsammelbehälter-Spülventil (10) ein erstes Rückschlagventil (36), ein zweites Rückschlagventil (38) und einen Unterdruckerzeuger (12) aufweist,
    Definieren eines Spülluftkreislaufs (A) von einem Turboladerauslass (25) durch den Unterdruckerzeuger (12) und zu einem Einlass (27) des Turboladers (26), wobei der Unterdruckerzeuger (12) aufgrund des Luftstroms dort hindurch einen ersten Unterdruck erzeugt, wenn der Turbolader (26) in Betrieb ist und der Einlasskrümmer (32) unter Überdruck steht, wodurch gewährleistet wird, dass sich bei Erzeugung des ersten Unterdrucks durch den Unterdruckerzeuger (12) das zweite Rückschlagventil (38) schließt, während sich das erste Rückschlagventil (36) öffnet, um das Ansaugen von Dampfspülstrom durch das Ventilglied (34) in den Spülluftkreislauf (A) zu gestatten, und
    während eines selbstansaugenden Zustands Gewährleisten, dass durch den Einlasskrümmer (32) erzeugter Unterdruck das erste Rückschlagventil (36) schließt und das zweite Rückschlagventil (38) öffnet, um sämtlichen Spülstrom durch den Krümmerauslasskanal (28) und zum Einlasskrümmer (32) umzuleiten,
    dadurch gekennzeichnet, dass
    das Spülventil (10) einen integralen Unterdruckerzeuger (12) aufweist und dass das erste und das zweite Rückschlagventil (36, 38) integral mit dem Kraftstoffdampfsammelbehälter-Spülventil (10) sind, wobei das erste Rückschlagventil (36) zwischen dem Unterdruckerzeuger (12) und dem Ventilglied (34) angeordnet sind, wobei das zweite Rückschlagventil (38) zwischen dem Ventilglied (34) und einem Krümmerauslasskanal (28) angeordnet ist und wobei der Krümmerauslasskanal (28) an den Einlasskrümmer (32) gekoppelt ist.
  8. Verfahren nach Anspruch 7, wobei der Unterdruckerzeuger (12) ein Venturi-Rohr (12) ist.
  9. Verfahren nach Anspruch 7, wobei der Schritt des Bereitstellens des Kraftstoffdampfsammelbehälter-Spülventils (10) Versehen des Kraftstoffdampfsammelbehälter-Spülventils (10) mit einem Körper (14) umfasst, wobei der Körper (14) in zwei Kammern (20, 22) unterteilt ist, wobei sich das erste Rückschlagventil (36) und der Unterdruckerzeuger (12) in der ersten Kammer (20) befinden und sich das zweite Rückschlagventil (38) in der zweiten Kammer (22) befindet.
  10. Verfahren nach Anspruch 9, wobei der Schritt des Bereitstellens des Kraftstoffdampfsammelbehälter-Spülventils (10) lösbares Koppeln des Körpers (14) an ein Gehäuse (33) des Ventilglieds (34) umfasst.
  11. Verfahren nach Anspruch 7, wobei jedes der Rückschlagventile (36, 38) ein Einwegventil mit einem elastomeren Ventilglied (40) ist, das dazu ausgeführt und angeordnet ist, sich basierend auf Druckdifferenzen daran zwischen der geöffneten und geschlossenen Stellung zu bewegen.
EP12740241.0A 2012-06-15 2012-06-15 Spülventil für kraftstoffdampfsammelbehälter mit integriertem unterdruckerzeuger und rückschlagventilen Active EP2861861B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2012/042632 WO2013187912A1 (en) 2012-06-15 2012-06-15 Canister purge valve with integrated vacuum generator and check valves

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Publication Number Publication Date
EP2861861A1 EP2861861A1 (de) 2015-04-22
EP2861861B1 true EP2861861B1 (de) 2018-03-07

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EP (1) EP2861861B1 (de)
CN (1) CN103732903B (de)
DE (1) DE112012006527T5 (de)
WO (1) WO2013187912A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE112012005308T5 (de) * 2011-12-19 2014-10-02 Continental Automotive Systems, Inc. Turbo-Spülmodul für turboaufgeladene Fahrzeuge
US9360125B2 (en) 2013-04-23 2016-06-07 Continental Automotive Systems, Inc. Turbo purge valve-check valve OBD vacuum relief
EP3152417B1 (de) 2014-06-06 2019-09-18 Dayco IP Holdings, LLC Schalldämpfung bei einer venturi-vorrichtung und/oder rückschlagventilen
FR3027956B1 (fr) * 2014-10-31 2016-11-04 Renault Sa Procede de diagnostic du fonctionnement de la purge d'un canister

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63162965U (de) * 1987-04-15 1988-10-25
IT1291010B1 (it) * 1997-01-14 1998-12-14 Ergom Materie Plastiche Spa Gruppo valvolare di sfiato per gas, particolarmente per vapori di carburante
IL165845A0 (en) * 2004-12-16 2006-01-15 Raval Acs Ltd Vapor recovery control valve
US8006674B2 (en) * 2005-07-28 2011-08-30 Eaton Corporation Vapor control system
JP2009539679A (ja) * 2006-06-07 2009-11-19 イートン コーポレーション ベントライン用チェック弁を有するオンボード燃料補給用蒸気回収システム
US20080000456A1 (en) 2006-06-30 2008-01-03 Siemens Canada Limited Cost-optimized canister purge valve
DE102009024697A1 (de) * 2009-06-12 2010-12-16 Aft Inh. Dirk Kramer E.K. Vorrichtung zum Einspeisen von flüchtigen Kraftstoffbestandteilen in ein Ansaugsystem einer Brennkraftmaschine
US8485214B2 (en) * 2009-06-22 2013-07-16 Eaton Corporation Small engine emissions control valve
WO2012174347A1 (en) * 2011-06-16 2012-12-20 Continental Automotive Systems, Inc. Canister purge valve with modular lower body having integeral check valves
US9109552B2 (en) * 2011-06-16 2015-08-18 Continental Automotive Systems, Inc. Canister purge valve with integrated vacuum generator and check valves
DE102011086946A1 (de) * 2011-08-18 2013-02-21 Robert Bosch Gmbh Entlüftungssystem für einen Kraftstofftank

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Publication number Publication date
DE112012006527T5 (de) 2015-03-19
EP2861861A1 (de) 2015-04-22
CN103732903A (zh) 2014-04-16
WO2013187912A1 (en) 2013-12-19
CN103732903B (zh) 2016-04-27

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