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EP3315757A1 - Kombiniertes ansaugluft- und abgasrückführungs-ventil - Google Patents

Kombiniertes ansaugluft- und abgasrückführungs-ventil Download PDF

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Publication number
EP3315757A1
EP3315757A1 EP17198370.3A EP17198370A EP3315757A1 EP 3315757 A1 EP3315757 A1 EP 3315757A1 EP 17198370 A EP17198370 A EP 17198370A EP 3315757 A1 EP3315757 A1 EP 3315757A1
Authority
EP
European Patent Office
Prior art keywords
valve according
housing
compartment
valve
duct
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Withdrawn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
EP17198370.3A
Other languages
English (en)
French (fr)
Inventor
Bruno CHALMETTE
Xavier Decomble
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.)
Renault SAS
Original Assignee
Renault SAS
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 Renault SAS filed Critical Renault SAS
Publication of EP3315757A1 publication Critical patent/EP3315757A1/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Withdrawn legal-status Critical Current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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/11—Manufacture or assembly of EGR systems; Materials or coatings specially adapted for EGR systems
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
    • F02M26/17—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system
    • F02M26/21—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the intake system with EGR valves located at or near the connection to the intake 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/51—EGR valves combined with other devices, e.g. with intake valves or compressors
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/53—Systems for actuating EGR valves using electric actuators, e.g. solenoids
    • F02M26/54—Rotary actuators, e.g. step motors
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/52—Systems for actuating EGR valves
    • F02M26/64—Systems for actuating EGR valves the EGR valve being operated together with an intake air throttle
    • 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
    • F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
    • F02M26/65—Constructional details of EGR valves
    • F02M26/72—Housings
    • F02M26/73—Housings with means for heating or cooling the EGR valve
    • 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
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10209—Fluid connections to the air intake system; their arrangement of pipes, valves or the like
    • F02M35/10222—Exhaust gas recirculation [EGR]; Positive crankcase ventilation [PCV]; Additional air admission, lubricant or fuel vapour admission

Definitions

  • the invention relates to a combined air intake and recycled exhaust valve for a vehicle engine.
  • the invention aims to provide the air intake functions in an air intake line of a heat engine, and recirculation of exhaust gas, overcoming the congestion problems noted in the existing engine architectures.
  • secondary assigned to an engine, is for the sole purpose of distinguishing this engine from the main engine of the vehicle for propelling said vehicle.
  • a secondary engine therefore has the function of controlling the positioning of the metering flap and / or the closing device of a valve according to the invention.
  • the invention relates to a valve for providing the functions of controlling the air intake flow rate in an air intake line, and controlling the flow of exhaust gas in an EGR circuit.
  • a valve according to the invention comprises a common housing delimiting a first compartment comprising a first intake duct in which is mounted a metering flap and a second compartment comprising a second duct EGR in which a closure device is mounted, said housing enclosing at least one secondary motor for operating said metering flap and said closing device.
  • a valve according to the invention is a combined valve, capable of being manufactured and / or developed separately, before being mounted in a single operation in a dedicated location of the vehicle, located near the engine. This combined valve appears as a separate unit forming a whole, can be mounted as is on the vehicle at the expected location.
  • the term "common” means that the housing is continuous and envelops both the air intake duct and the EGR duct.
  • the casing may be constituted by a one-piece integral piece made of a homogeneous material, or may be constituted by two distinct parts able to fit together and to be fixed one inside the other to obtain a resulting casing. compact.
  • Each secondary engine is preferably an electric motor operating from the vehicle electrical network.
  • the closure device of the second compartment is a device involving a closing valve operating in translation, or a device involving a rotary shutter.
  • the term "secondary" attributed to the engine has the sole purpose of distinguishing it from the engine of the vehicle.
  • the casing is monobloc and constitutes a single piece made of a uniform material.
  • a valve according to the invention contains control connection elements of the metering flap and the closure device of the EGR duct, said connector elements being housed in a common location of the housing.
  • a valve according to the invention comprises a cooling circuit of the closing device of the second EGR duct and a cooling circuit of the metering flap of the first duct, said two cooling circuits being connected to one another. other in the crankcase.
  • the casing is in the form of a first portion delimiting the first compartment and a second portion delimiting the second compartment, said two parts having two complementary indentations intended to ensuring an extensive surface contact between said two parts.
  • the two parts are intended to fit one into the other to ensure an extensive, stable and repetitive contact between them.
  • the two impressions in contact can for example be represented by two faces in contact and centered by centering pins. It can also be assumed that one of the indentations is prominent and the other imprint is hollow, so that the close co-operation between said imprints is the least cumbersome possible, while preserving the two original features for which the valve has been designed.
  • the two parts once the two impressions have been positioned relative to each other in a cooperation configuration, are fixed to each other, for example with screws.
  • the two imprints have the same dimensions and provide plane contact between them, the first part and the second part being in perfect continuity with one another. In this way, the joining between the two parts of the casing takes place without creating roughness or relief, reinforcing the "continuous" character of the casing.
  • the first part is fixed to the second part with screws arranged at the periphery of the joint plane between said parts.
  • the housing is made of a material to be selected from aluminum and plastic. These are lightweight materials with good mechanical strength.
  • the housing is composed of two parts, said two parts are each either aluminum or plastic.
  • the casing surrounds a single secondary motor, intended to control both the metering flap of the first compartment and the closing device of the second compartment.
  • This configuration is simplified and economical, and facilitates the operation of a valve according to the invention by limiting the number of parts involved therein.
  • the opening and closing kinematics of the two compartments of the valve are interdependent and are preprogrammed at the single secondary engine, to optimize the sequences of use of the incoming air and the exhaust gases evolving. in the EGR circuit.
  • the casing encloses a first secondary motor for controlling the metering flap of the first compartment and a second secondary motor for controlling the closing device of the second compartment.
  • the first secondary motor is rotatable about a first axis and the second secondary motor is rotatable about a second axis, said two motors being positioned in the valve in a configuration to be chosen from a configuration for which the first and the second axes are aligned, the first and second axes are offset and parallel, and the first and second axes are perpendicular.
  • the relative positioning of the two motors in the valve will depend on the configuration of the available spaces for receiving said valve, because it will prefigure the final geometry of the valve. Both motors are placed in the valve so as to limit the size of said valve.
  • a valve according to the invention comprises at least one electronic card adapted to drive said at least one secondary motor and at least one connector element for supplying said at least one card.
  • a combined valve according to the invention has the advantage of being manufactured separately, before being mounted in the vehicle. As a result, it is manufactured with precision and mastery, without the constraints of accessibility caused by the restricted spaces and removed, left vacant in the vehicle for its assembly. Indeed, currently, the air intake flow control valve and the valve managing the flow of exhaust gas in an EGR circuit, are fixed directly and separately in the vehicle with the risk of improper assembly.
  • a combined valve according to the invention also has the advantage of being able to halve the number of certain related parts, such as, for example, secondary motor supply wiring and valve cooling circuits.
  • the three preferred embodiments of a valve according to the invention comprise a housing made in two distinct parts, one delimiting an intake duct of air, and the other delimiting an EGR duct.
  • the air intake duct is intended to be integrated in an air intake line of a heat engine and contributes to convey air from the outside of the vehicle to an intake manifold. air which distributes this air in combustion chambers of said engine.
  • the EGR duct is intended to be integrated in an EGR circuit connecting an area of an exhaust line to a zone of the air intake line, so as to convey exhaust gases into said exhaust line. air intake line.
  • a first preferred embodiment of a combined valve 1 comprises a casing 2 in two distinct parts 3, 4, a first part 3 delimiting a first compartment comprising a first duct 5 for admission of air, and a second part 4 delimiting a second compartment comprising a second conduit 6 of EGR.
  • These two parts 3, 4 are made of aluminum or plastic, and are interconnected by screws 7. More specifically, the first part 3 which delimits the air intake duct 5 has a first hollow body 8 delimited by a side wall having an open and flat end, defined by said wall.
  • the second part 4 which delimits the EGR duct 6 has a second hollow body 9 delimited by a side wall having an open and flat end delimited by said wall.
  • the open and flat end of the first body 8 has the same dimensions as those of the open and flat end of the second body 9.
  • the two parts 3, 4 of the casing 2 are placed in contact with one another, bringing the open and flat end of the first body 3 into contact with the open and flat end of the second body 4. Since these two ends have the same dimensions, they correspond perfectly to form a joint plane, the outer surface of the first body 8 being in perfect continuity with the outer surface of the second body 9.
  • the ends of the first body 8 and the second body 9 have perforated radial extensions , which are superimposed from one body to another to allow the passage of screws 7 fixing. When the first part 3 is thus fixed to the second part 4, the screws 7 are visible because they emerge at the periphery of said two hollow bodies 8, 9.
  • the first body 8 is found in perfect continuity with the second body 9, so that the casing 2 resulting is continuous, having a smooth outer surface, without any roughness or without any relief at the junction of said body 8, 9.
  • the EGR duct 6 and the intake duct 5 fresh air are parallel within the combined valve 1, the first hollow body 8 and the second hollow body 9 extending in a direction tending to connect the first fresh air duct 5 and the second duct 6 EGR.
  • a metering flap 10 is rotatably mounted in the first intake duct 5 to regulate the incident air flow passing through said duct 5.
  • This metering flap 10 is controlled by a first secondary electric motor 11 able to displace said flap 10. an extreme position of complete closure of the first intake duct 5 to an extreme position of complete opening of said duct 5 as shown in FIG. figure 1 .
  • the secondary motor 11 is also designed to place the flap 10 in at least one intermediate position between the two preceding extreme positions.
  • the secondary motor 11 is housed in the first part 3 of the casing 2 and is rotatably mounted therein about an axis of rotation.
  • a flap 12 is rotatably mounted in the second EGR duct 6 for regulating the flow of the exhaust gases passing through an EGR circuit.
  • This flap 12 is controlled by a second secondary electric motor 13 capable of moving said flap 12 from an extreme position of complete closure of the second EGR duct 6 to an extreme position of completely opening said duct 6 as shown in FIG. figure 1 .
  • the motor 13 is also designed to place the flap 12 in at least one intermediate position between the two previous extreme positions.
  • the secondary motor 13 is housed in the second portion 4 of the casing 2 and is rotatably mounted therein about an axis of rotation. The axes of rotation of the two secondary electric motors 11, 13 are offset and parallel.
  • Each of the two parts 3, 4 of the casing 2 also houses a connector element and an electronic card adapted to manage the operation of the corresponding electric motor 11, 13, as a function of the opening and / or closing requirements of the metering flap 10 and EGR component 12.
  • the connector element and the electronic card of the two parts 3, 4 can be grouped in a single location of the casing 2 to improve the compactness of the combined valve 1.
  • Such a combined valve 1 comprising all the previously described elements can be manufactured separately, to constitute an autonomous object and able to be subsequently fixed in a vehicle, at a location provided for this purpose.
  • This combined valve 1 is fixed to the vehicle by means of screws 18, then the electrical connections are made at the connection elements to make said valve 1 operational.
  • Cooling circuits (not shown in the figures) of the flaps 10, 12 of the EGR duct 6 and the intake duct 5 can also be pooled within the combined valve 1, in order to simplify the structure of said valve 1. The connection of the engine cooling circuit with the cooling circuit of the EGR circuit flaps and intake air within the combined valve is therefore simplified.
  • a second preferred embodiment of a combined valve 20 comprises a casing 22 in two distinct parts 23, 24, a first portion 23 delimiting a first compartment comprising a first duct 5 for admission of fresh air and a second portion 24 delimiting a second compartment comprising a second EGR duct 6.
  • These two parts 23, 24 are made of aluminum and are interconnected by screws.
  • the first portion 23 which defines the air intake duct 5 has a first hollow body 28 delimited by a side wall having an open and flat end delimited by said wall.
  • the second portion 24 which delimits the EGR duct 6 has a second hollow body 29 delimited by a side wall having an open and flat end delimited by said wall.
  • the two hollow bodies 28, 29 are cylindrical.
  • the open and flat end of the first body 28 has the same dimensions as those of the open and flat end of the second body 29.
  • the two parts 23, 24 of the casing 2 are placed in contact with each other, contacting the open end and plane of the first body 23 with the open end and plane of the second body 24. Since these two ends have the same dimensions, they correspond perfectly to form a joint plane, the outer surface of the first body 28 being in the perfect continuity of the external surface of the second body 29.
  • the first part 23 is thus fixed to the second part 24, the first body 28 is found in perfect continuity with the second body 9, so that the housing 2 resulting is continuous, having a smooth outer surface without any roughness or any relief at the junction between said bodies 28, 29.
  • valve 20 the two ducts 5, 6 are substantially parallel.
  • a metering flap 10 is rotatably mounted in the first intake duct 5 for regulating the flow of fresh air passing through said duct 5.
  • This metering flap 10 is controlled by a first secondary electric motor 31 able to displace said flap 10. an extreme position of complete closure of the first intake duct 5 to an extreme position of complete opening of said duct 5 as shown in FIG. figure 2 .
  • the secondary motor 31 is also designed to place the flap 10 in at least one intermediate position between the two preceding extreme positions.
  • the secondary motor 31 is housed in the first portion 23 of the housing 22 and is rotatably mounted therein about an axis of rotation.
  • a flap 12 is rotatably mounted in the second EGR duct 6 for regulating the flow of the exhaust gases passing through an EGR circuit.
  • This flap 12 is controlled by a second secondary electric motor 33 capable of moving said flap 12 from an extreme position of complete closure of the second EGR duct 6 to an extreme position of completely opening said duct 6 as shown in FIG. figure 2 .
  • the secondary motor 33 is also designed to place the flap 12 in at least one intermediate position between the two previous extreme positions.
  • the secondary motor 33 is housed in the second portion 24 of the housing 2 and is rotatably mounted therein about an axis of rotation.
  • first motor 31 is placed in the first hollow body 28 of the first portion 23 of the housing 22 and the second motor 33 is placed in the second hollow body 29 of the second portion 24 of said housing.
  • the two electric motors 31, 33 are aligned one behind the other in the two hollow bodies 28, 29, so that their axes of rotation are in perfect continuity.
  • Each of the two parts 23, 24 of the housing 22 also houses a connector element 34, 35 and an electronic card 36, 37 able to manage the operation of the corresponding electric motor 31, 33, depending on the opening and / or closing the metering flap 10 and the EGR flap 12.
  • connection elements 34, 35 may, according to a particular embodiment, be grouped together to be housed, for example, in one of the parts 23, 24 of the casing 22 in order to improve the compactness of the casing 22 and therefore of the combined valve. 20.
  • the cooling circuits of the flaps 10, 12 of the EGR duct 6 and of the admission duct 5 can also be shared and thus simplified within the combined valve 20.
  • the cooling circuit of the flap 12 of the EGR duct 6 can be connected directly or prolonged in the cooling circuit of the metering flap 10 within the housing 22.
  • Such a combined valve 20 comprising all the previously described elements can be manufactured separately, to constitute an autonomous object and able to be subsequently fixed in a vehicle, in a location provided for this purpose.
  • This combined valve 20 is fixed to the vehicle by means of screws not visible on the figure 2 , then the electrical connections are made at the connection elements 34, 35 to make said valve 20 operational.
  • a third preferred embodiment of a combined valve 40 differs from the second preferred embodiment previously described in that the flap 12 of EGR is replaced by a valve 52 operating in translation between an extreme position. of complete opening of the EGR duct 6 as shown in FIG. figure 3 , and an extreme position of complete closing of said duct 6.
  • This valve 42 is also able to occupy at least one intermediate position between said two extreme positions.
  • the second portion 44 of the housing 42 defines an EGR duct 46 which extends perpendicular to the inlet duct 5 of the first portion 23.
  • the two secondary motors 11, 13, 31, 33 are parallel and are placed side by side. Their axes of rotation are parallel.
  • the two secondary motors 11, 13, 31, 33 are perpendicular, which means that their axes of rotation are perpendicular.
  • the housing of the combined valve can be made in one piece of aluminum, to overcome all the interaction and attachment between the two parts of a housing.
  • the air intake duct 5 and the EGR duct 6 can be managed with one and the same secondary electric motor, resulting in a uniqueness of the connection element on the valve and the presence of a single electronic card for the management of said two conduits 5, 6.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
EP17198370.3A 2016-10-28 2017-10-25 Kombiniertes ansaugluft- und abgasrückführungs-ventil Withdrawn EP3315757A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1660500A FR3058187B1 (fr) 2016-10-28 2016-10-28 Vanne combinee d'admission d'air et de gaz d'echappement recycles

Publications (1)

Publication Number Publication Date
EP3315757A1 true EP3315757A1 (de) 2018-05-02

Family

ID=57590675

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17198370.3A Withdrawn EP3315757A1 (de) 2016-10-28 2017-10-25 Kombiniertes ansaugluft- und abgasrückführungs-ventil

Country Status (2)

Country Link
EP (1) EP3315757A1 (de)
FR (1) FR3058187B1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012223466A1 (de) * 2012-12-17 2014-06-18 Continental Automotive Gmbh Ventil
EP2865880A1 (de) * 2013-10-23 2015-04-29 Kamtec, Inc. Abgasrückführungsventil (AGR) für ein Fahrzeug
WO2015153439A1 (en) * 2014-04-02 2015-10-08 Borgwarner Inc. Turbocharger with integrated venturi mixer and egr valve

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012223466A1 (de) * 2012-12-17 2014-06-18 Continental Automotive Gmbh Ventil
EP2865880A1 (de) * 2013-10-23 2015-04-29 Kamtec, Inc. Abgasrückführungsventil (AGR) für ein Fahrzeug
WO2015153439A1 (en) * 2014-04-02 2015-10-08 Borgwarner Inc. Turbocharger with integrated venturi mixer and egr valve

Also Published As

Publication number Publication date
FR3058187A1 (fr) 2018-05-04
FR3058187B1 (fr) 2019-06-21

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