EP1826391A2 - Dispositif de recyclage des gaz d'échappement - Google Patents

Dispositif de recyclage des gaz d'échappement Download PDF

Info

Publication number
EP1826391A2
EP1826391A2 EP06126368A EP06126368A EP1826391A2 EP 1826391 A2 EP1826391 A2 EP 1826391A2 EP 06126368 A EP06126368 A EP 06126368A EP 06126368 A EP06126368 A EP 06126368A EP 1826391 A2 EP1826391 A2 EP 1826391A2
Authority
EP
European Patent Office
Prior art keywords
section
wall portion
exhaust gas
fresh gas
venturi nozzle
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Withdrawn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
EP06126368A
Other languages
German (de)
English (en)
Other versions
EP1826391A3 (fr
Inventor
Rafael Weisz
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.)
Mahle International GmbH
Original Assignee
Mahle International GmbH
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 Mahle International GmbH filed Critical Mahle International GmbH
Publication of EP1826391A2 publication Critical patent/EP1826391A2/fr
Publication of EP1826391A3 publication Critical patent/EP1826391A3/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/18—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having elastic-wall valve members
    • 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
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/09—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine
    • F02M26/10—Constructional details, e.g. structural combinations of EGR systems and supercharger systems; Arrangement of the EGR and supercharger systems with respect to the engine having means to increase the pressure difference between the exhaust and intake system, e.g. venturis, variable geometry turbines, check valves using pressure pulsations or throttles in the air intake or exhaust 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
    • F02M26/13—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
    • F02M26/19—Means for improving the mixing of air and recirculated exhaust gases, e.g. venturis or multiple openings 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
    • F02M26/13—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
    • F02M26/65—Constructional details of EGR valves
    • F02M26/66—Lift valves, e.g. poppet valves
    • F02M26/67—Pintles; Spindles; Springs; Bearings; Sealings; Connections to actuators
    • 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
    • F02M26/71—Multi-way valves
    • 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
    • F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
    • F02M35/10118—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements with variable cross-sections of intake ducts along their length; Venturis; Diffusers
    • 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
    • F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
    • F02M35/10137—Flexible ducts, e.g. bellows or hoses
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • F02B29/0406—Layout of the intake air cooling or coolant circuit
    • F02B29/0437—Liquid cooled heat exchangers
    • 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
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/05—High pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust system upstream of the turbine and reintroduced into the intake system downstream of the compressor
    • 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
    • F02M26/22—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with coolers in the recirculation passage
    • F02M26/23—Layout, e.g. schematics
    • F02M26/28—Layout, e.g. schematics with liquid-cooled heat exchangers
    • 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
    • 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
    • F02M35/1015—Air intakes; Induction systems characterised by the engine type
    • F02M35/10157—Supercharged engines

Definitions

  • the present invention relates to an exhaust gas recirculation device for an internal combustion engine, in particular in a motor vehicle, having the features of the preamble of claim 1.
  • an exhaust gas recirculation device which has a return line and which is equipped with a fresh gas line section.
  • a Venturi nozzle is formed in an introduction region of the fresh gas line section.
  • the return line is now connected to the fresh gas line section so that it opens into a low-pressure region of the Venturi nozzle.
  • the pressure in the fresh gas line in many operating ranges of the internal combustion engine may be higher than the pressure in an exhaust pipe. Exhaust gas recirculation is then not possible without additional measures.
  • the pressure in the fresh gas line can be locally lowered so far that a sufficient pressure gradient between Exhaust pipe and fresh gas line is created to allow the desired exhaust gas recirculation.
  • the desired local pressure reduction can only be achieved if the flow velocities prevailing therein are relatively high, e.g. greater than 0.65 Mach.
  • the throughput is limited by a Venturi nozzle on the adjusting when reaching the speed of sound mass flow.
  • the design of the Venturi nozzle must therefore take into account the maximum required mass flow of fresh gas. At low engine speed and / or low load is reduced in many applications, the flow velocity in the Venturi so far that the pressure reduction required for the intake of the exhaust gases is not achieved.
  • the present invention is concerned with the problem of providing for an exhaust gas recirculation device of the type mentioned in an improved embodiment, which is particularly characterized in that it operates reliably in a relatively large operating range of the internal combustion engine and allows a sufficient, preferably adjustable, exhaust gas recirculation rate.
  • the invention is based on the general idea to design the Venturi nozzle with a variable nozzle geometry, such that the narrowest flow cross-section of the Venturi nozzle is variable or adjustable.
  • a comparatively large flow cross-section can thus be set in order to set the particular desired pressure drop and thus the respective desired return flow rate at a flow rate close to the speed of sound.
  • the flow cross-section can be narrowed accordingly, in order to realize flow velocities in the vicinity of the speed of sound. Accordingly, even with relatively small mass flows, a sufficient pressure reduction in the Venturi nozzle can be set in order to achieve the respectively desired exhaust gas recirculation rate.
  • variable venturi in a large, preferably in the entire, operating range of the internal combustion engine, to produce a pressure drop in the Venturi nozzle required to realize the respective desired exhaust gas recirculation rate.
  • the exhaust gas recirculation device is thereby more efficient and improves the pollutant emission of the engine equipped therewith over a wider operating range.
  • the adjustability of the flow cross section can be realized in principle with the Venturi nozzle in different ways.
  • An embodiment with such an adjustable wall section can be realized comparatively inexpensively.
  • an internal combustion engine 1 in particular in a motor vehicle, comprises an engine block 2 with a plurality of cylinders 3.
  • the internal combustion engine 1 has a fresh gas line 4 which supplies fresh gas to the cylinders 3.
  • an exhaust pipe 5 is provided, which discharges exhaust gas from the cylinders 3.
  • the internal combustion engine 1 is equipped with an exhaust gas recirculation device 6, which has a return line 7 and a fresh gas line section 8.
  • the fresh gas line section 8 is shown in FIG mounted state in the fresh gas line 4 installed.
  • the return line 7 connects in the illustrated assembled state, the exhaust pipe 5 with the fresh gas line section. 8
  • the Venturi nozzle 10 is designed such that it has a variable flow cross-section, which is symbolized in Fig. 1 by a control arrow 12.
  • the internal combustion engine 1 is a supercharged internal combustion engine 1, e.g. Diesel engine or gasoline engine, which has a charging device or a supercharger 13 in the fresh gas line 4.
  • the supercharger 13 is a compressor 14 of an exhaust-gas turbocharger 15, the turbine 16 of which is arranged in the exhaust-gas line 5.
  • another embodiment of the supercharger 13 is possible, for example a mechanically driven compressor, in particular Roots blower.
  • a charge air cooler 17 may be arranged downstream of the supercharger 13.
  • an exhaust gas recirculation cooler 18 may be arranged in the return line 7 upstream of the fresh gas line section 8. Furthermore, the return line 7, for example, the exhaust gas recirculation cooler 18, a check valve 19 include.
  • the exhaust gas recirculation device 6 can be equipped with an adjusting device 20 for realizing the adjustability of the narrowest flow cross section of the Venturi nozzle 10.
  • the adjusting device 20 may be an electric motor, in particular a stepper motor, or any other actuator that can operate electrically, magnetically, hydraulically and / or pneumatically.
  • the venturi 10 may have at least one adjustable wall section 21 in accordance with the embodiments shown here.
  • the adjustable wall portion 21 is adjustable with respect to its distance from an opposite wall portion 22.
  • the last-mentioned wall section 22 is fixed and is therefore referred to below as a fixed wall section 22.
  • the distance between the adjustable wall portion 21 and the fixed wall distance 22 is measured transversely to a flow direction 23 of the Venturi nozzle 10. This flow direction 23 is symbolized here by an arrow.
  • the wall sections 21, 22 of the Venturi nozzle 10 form in the flow direction 23 a Venturi nozzle profile, which first converges and then diverges.
  • the venturi 10 has transversely to its flow direction 23 is substantially a rectangular profile.
  • This construction simplifies the realization of the variable flow cross section by means of the adjustable wall section 21.
  • the wall sections 21, 22 are bounded laterally, ie transversely to the flow direction 23 by side walls 24, of which only one is visible in the illustrated sectional views. These side walls 24 may be flat in order to be able to displace the adjustable wall section 21 comparatively densely along the side walls 24 transversely to the flow direction 23.
  • the adjustable wall section 21 is formed by a resiliently bendable membrane 25.
  • the membrane 25, which may for example consist of a steel sheet, is fastened to its fresh gas line section 8 at its end sections 26, 27 which are spaced apart from one another in the throughflow direction 23.
  • at least one of these end sections 26, 27, in this case the downstream end section 27, is fastened to the fresh gas line section 8 such that it can be displaced in the throughflow direction 23 relative to the fresh gas line section 8.
  • This displacement can be achieved for example by means of a slot configuration 28, which is indicated in Fig. 3.
  • the membrane 25 is shaped so that it automatically assumes a starting position in which the distance between the two wall sections 21, 22 is maximum. In this starting position, it is biased by their spring property.
  • an additional spring can be installed, for example, a cylindrical coil spring which acts on the diaphragm 25 or on the valve or actuator 29 explained in more detail below, and in particular is arranged concentrically to the valve 29.
  • this initial position can be defined by the slot configuration 28.
  • the adjusting device 21 can adjust the diaphragm 25 in the direction of the fixed wall section 22, whereby the distance between the wall sections 21, 22 is reduced.
  • the minimum adjustable distance is again defined by the slot configuration 28.
  • the adjusting device 20 is drive-coupled to the adjustable wall section 21.
  • the adjusting device 20 on an actuator 29, which is designed here by way of example in the manner of a valve lifter.
  • the actuator 29 is drive-coupled to the diaphragm 25, by means of a driver 30 which cooperates with a driver plate 31.
  • the driver plate 31 is attached to the membrane 25 and forms together with the driver 30 a driver assembly.
  • the driver assembly 30, 31 may be configured so that it has a predetermined idle stroke. This means that the actuator 29 must first perform the idle stroke before its stroke adjustment causes an adjustment of the diaphragm 25.
  • the idle stroke is used to actuate a check valve 32, by means of which the return line 7 is blocked or can be opened.
  • a check valve 32 By means of which the return line 7 is blocked or can be opened.
  • the recirculated exhaust gas symbolized by an arrow 34, enters the venturi 10.
  • a valve seat 35 of the check valve 32 is formed which cooperates with a valve member 36. When retracted into its valve seat 35 valve member 36, the return line 7 is locked and turned off the exhaust gas recirculation.
  • said check valve 32 can be configured completely independently of the adjusting device 20.
  • the valve member 36 is formed on the actuator 29 of the actuator 20, so that via the actuator 20 at the same time the check valve 32 can be actuated. In order to open the check valve 32 at the maximum flow cross-section of the venturi 10, the aforementioned idle stroke is required.
  • the actuator 29 is in the direction of the distance between the two wall sections 21, 22, so transversely to the flow direction 23 stroke adjustable. Furthermore, the actuator 29 penetrates here the membrane 25 and extends in its stroke direction through the mouth opening 33 through to the return line 7. Accordingly, the actuator 29 passes through a passing through the Venturi nozzle 10 Flow path 37, which is also indicated by an arrow.
  • the return line 7 has a mouth section 38 which opens into the fresh gas line section 8 and can form an integral component together with the fresh gas line section 8.
  • this mouth section 38 has a longitudinal direction which runs essentially transversely to the throughflow direction 23.
  • the mouth opening 33 is arranged in the middle section of the venturi 10 and is therefore located in the region of the narrowest flow cross-section of the venturi 10. The relative position between the mouth 33 within the venturi 10 is stationary or invariant.
  • the actuator 20 may include an eccentric 39 to provide rotational movement, e.g. a rotary actuator to convert into the lifting movement of the actuator 29.
  • the exhaust gas recirculation device 6 may be equipped with a fail-safe function which sets a minimum Abraskostexrate, in particular to the value zero, for the exhaust gas recirculation, for example by the venturi 10 set to maximum flow area or minimum pressure drop is and in particular the check valve 19 and 32 is actuated to lock the return line 7.
  • the mouth section 38 of the return line 7 opening into the fresh gas line section 8 is arranged stationarily in the interior of the fresh gas line section 8, preferably such that the longitudinal direction of the mouth section 38 extends substantially parallel to the flow direction 23 , Furthermore, this mouth portion 38 is arranged in the fresh gas line section 8 so that the mouth opening 33 is open axially and in the flow direction 23. Furthermore, the arrangement of the mouth section 38 takes place in such a way that here too the mouth opening 33 is located in the region of the narrowest flow cross-section of the venturi 10.
  • the mouth portion 38 may have a cross-sectional profile which is elliptical in the mouth opening 33 and continuously merges upstream into a circular profile. In this way, the mouth section 38 in the region of the mouth opening 33 is adapted to the rectangular profile of the Venturi nozzle 10.
  • the actuator 29 is arranged exclusively on a side of the membrane 25 facing away from the flow path 37. That is, the actuator 29 does not protrude into the flow path 37 and thereby does not lead to a disturbance of the fresh gas flow in the fresh gas line section 8.
  • the actuator 29 is supported here on a large area of the membrane 25 via a driver plate 31.
  • the adjustable wall section 21 can be pivotally attached to the fresh gas line section 8 at one of its end sections 26, 27, here at the downstream end section 27 substantially around a pivot axis 40 extending transversely to the flow direction.
  • the adjustable wall section 21 may be designed as a resilient membrane in said end section 27 or may be fastened to the fresh gas line section 8 via a spring-elastic membrane 41. The bending deformation of the membrane 41 or of the membrane-like end section 27 results in the pivot axis 40, whose spatial position can change during the pivotal adjustment of the wall section 21.
  • the use of a hinge is possible, which provides a fixedly defined pivot axis 40.
  • the adjustable wall portion 21 is comparatively solid, but in particular designed rigid or rigid.
  • the actuator coupling of the adjustable wall portion 21 with the adjusting device 20 takes place in the region of the other, ie the upstream end portion 26.
  • the actuator 29 is wedge-shaped in the present case and in the manner of a slide along a flat wall 42 of the fresh gas line section 8 parallel to the flow direction 23 relative to the fresh gas line section 8 and thus relative to the adjustable wall section 21 adjustable.
  • the wedge-shaped actuator 29 has on its flow path 37 side facing a ramp 43, on which the adjustable wall section 21 rests with its upstream end section 26 and slides off during adjustment movements of the actuator 29 along the ramp 43.
  • the latter has, for example, a gear mechanism 44.
  • the adjustable wall section 21 can have at least two wall sections, namely a first wall section 45 and a second wall section 46, which overlap one another in the flow direction 23.
  • the first wall section 45 is pivotally attached to the fresh gas line section 8 at an end section 47 remote from the second wall section 46, which here is arranged at the outlet of the Venturi nozzle 10, about a pivot axis 48 extending transversely to the flow direction 23.
  • the first wall portion 45 is formed for example by a resilient membrane, for example made of sheet steel.
  • the pivotability about the pivot axis 48 results from bending deformations of the membrane-like first wall section 45 in the region of the fixed end section 47.
  • a hinge with a defined pivot axis 48 can alternatively be provided.
  • the second wall portion 46 is rotatably mounted on a shaft 50 at an end portion 49 remote from the first wall portion 45, which is arranged here at the inlet of the venturi 10.
  • Said shaft 50 is rotatably arranged on the fresh gas line section 8 about a rotation axis 51, which extends transversely to the flow direction 23 and parallel to the pivot axis 48.
  • the actuator 20 is, e.g. via gears 52, 53, drive-coupled to the shaft 50 and thereby drives the second wall portion 46 to pivotal adjustments with respect to the axis of rotation 51 at.
  • the shaft 50 forms the actuator 29 of the actuator 20.
  • the second wall section 46 abuts against the first wall section 45 on a side facing the flow path 37 and slides thereon.
  • the second wall section 46 can take along the first wall section 45 during pivoting, wherein it pivots about its pivot axis 48.
  • the first wall section 45 is preferably pivoted against a spring force. When turning back the second wall section 46, the first wall section 45 can follow automatically by said spring force.
  • the overlapping region 54 can be arranged, for example, in the region of the narrowest flow cross-section of the Venturi nozzle 10, that is to say essentially centrally.
  • the exhaust gas recirculation device 6 makes it possible to adjust the exhaust gas recirculation rate by adjusting the pressure drop in the low pressure region 11 of the venturi 10 by varying the (narrowest) flow cross section of the venturi 10.
  • sufficient exhaust gas recirculation can be realized even with comparatively small fresh gas volume flows by reducing the flow cross section of the Venturi 10 until flow velocities in the Venturi 10 are established which produce the pressure drop in the low pressure region 11 required for the exhaust gas intake.
  • the pressure drop in the Venturi nozzle 10 is adjusted so that the exhaust gas recirculation amount reaches the desired or required value. This value as well as other engine values may e.g. be stored in the engine control as a map.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
EP06126368A 2006-02-24 2006-12-18 Dispositif de recyclage des gaz d'échappement Withdrawn EP1826391A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006009153A DE102006009153A1 (de) 2006-02-24 2006-02-24 Abgasrückführeinrichtung

Publications (2)

Publication Number Publication Date
EP1826391A2 true EP1826391A2 (fr) 2007-08-29
EP1826391A3 EP1826391A3 (fr) 2010-09-01

Family

ID=38038925

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06126368A Withdrawn EP1826391A3 (fr) 2006-02-24 2006-12-18 Dispositif de recyclage des gaz d'échappement

Country Status (3)

Country Link
US (1) US7353811B2 (fr)
EP (1) EP1826391A3 (fr)
DE (1) DE102006009153A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2917131A1 (fr) * 2007-06-06 2008-12-12 Renault Sas Moteur a combustion interne comportant un dispositif apte a animer d'un mouvement tourbillonnaire ordonne les gaz d'echappement recircules injectes.
FR2921433A1 (fr) * 2007-09-25 2009-03-27 Mann & Hummel Gmbh Dispositif de mise en tourbillonnement et de melange de gaz d'echappement recycles dans la tubulure d'aspiration d'un moteur a combustion interne.
FR2929677A1 (fr) * 2008-04-02 2009-10-09 Renault Sas Dispositif d'obturation d'un conduit.
ITMI20091080A1 (it) * 2009-06-18 2010-12-19 Dellorto Spa Sistema ed apparecchiatura di controllo di egr nell'impianto di alimentazione di motori a combustione interna sovralimentati
WO2011061051A1 (fr) * 2009-11-19 2011-05-26 Pierbrug Gmbh Dispositif de réglage permettant de convertir un mouvement rotatif en un mouvement linéaire
WO2011067138A1 (fr) * 2009-12-01 2011-06-09 Pierbrug Gmbh Ensemble soupape pour moteur à combustion interne
DE202015002208U1 (de) * 2015-03-21 2016-06-23 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Verbrennungsmotor
EP2823175B1 (fr) * 2012-03-06 2017-03-15 Pierburg GmbH Dispositif d'admission de gaz d'échappement pour un moteur à combustion interne
FR3060664A1 (fr) * 2016-12-21 2018-06-22 Valeo Systemes De Controle Moteur Ensemble de circulation de gaz d’echappement d’un moteur thermique
FR3060665A1 (fr) * 2016-12-21 2018-06-22 Valeo Systemes De Controle Moteur Ensemble de circulation de gaz d'echappement d'un moteur thermique

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005020484A1 (de) * 2005-04-29 2006-11-02 Mahle International Gmbh Abgasrückführeinrichtung
BRPI0520708A2 (pt) * 2005-11-29 2009-05-19 Volvo Lastvagnar Ab misturador de recirculação de gás de exaustão para um motor de combustão interna de turbo charging
DE102007045623B4 (de) * 2007-09-24 2009-07-23 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH Verfahren und Vorrichtung zum Verbessern einer Abgasrückführung einer Verbrennungskraftmaschine
DE102007061324A1 (de) * 2007-12-19 2009-06-25 Boa Balg- Und Kompensatoren-Technologie Gmbh Vorrichtung zur Abgasrückführung
WO2010083151A2 (fr) * 2009-01-13 2010-07-22 Avl North America Inc. Mélangeur de recirculation des gaz d'échappement (egr) du type éjecteur
US7886727B2 (en) * 2009-05-26 2011-02-15 Ford Global Technologies, Llc Variable venturi system and method for engine
US10196993B2 (en) * 2009-09-08 2019-02-05 Ge Global Sourcing Llc System and method for operating a turbocharged engine
US8056546B2 (en) * 2010-03-24 2011-11-15 Ford Global Technologies, Llc Multi-function throttle valve
US8056340B2 (en) * 2010-08-17 2011-11-15 Ford Global Technologies, Llc EGR mixer for high-boost engine systems
US8689553B2 (en) * 2011-01-18 2014-04-08 GM Global Technology Operations LLC Exhaust gas recirculation system for an internal combustion engine
CA2863077A1 (fr) 2012-01-23 2013-08-01 Aeon Research And Tecnology, Llc Systeme de traitement pulmonaire modulaire
US9074540B2 (en) 2012-04-19 2015-07-07 Cummins Inc. Exhaust gas recirculation systems with variable venturi devices
US20130319381A1 (en) * 2012-05-30 2013-12-05 GM Global Technology Operations LLC Engine including venturi in intake air flow path for exhaust gas recirculation supply
JP6035987B2 (ja) * 2012-08-10 2016-11-30 いすゞ自動車株式会社 排気再循環用ベンチュリ
US20140174078A1 (en) * 2012-12-20 2014-06-26 Caterpillar Inc. Egr system having flow restricting valve
US10465637B2 (en) * 2013-02-28 2019-11-05 Bendix Commercial Vehicle Systems, Llc Method to enhance gas recirculation in turbocharged diesel engines
JP6056748B2 (ja) * 2013-12-20 2017-01-11 トヨタ自動車株式会社 過給エンジンのｅｇｒシステム
EP2957835B1 (fr) * 2014-06-18 2018-03-21 Ansaldo Energia Switzerland AG Procédé de recirculation des gaz d'échappement provenant d'une chambre de combustion d'un brûleur d'une turbine à gaz et turbine à gaz pour l'exécution de ce procédé
US9574528B2 (en) * 2014-12-17 2017-02-21 Caterpillar Inc. Exhaust gas recirculation adapter
EP3341615B1 (fr) * 2015-08-28 2021-09-29 Dayco IP Holdings, LLC Restricteurs utilisant l'effet venturi
US9885296B2 (en) * 2015-11-18 2018-02-06 Ford Global Technologies, Llc Method and system for vacuum generation using a throttle body comprising a slidable throttle valve
US10060365B2 (en) * 2015-11-18 2018-08-28 Ford Global Technologies, Llc Method and system for vacuum generation using a throttle body comprising a slidable throttle valve
CN105570931B (zh) * 2015-12-30 2017-12-01 中国科学院工程热物理研究所 一种可引射燃烧器出口流体的燃烧器
DE102016003003B4 (de) * 2016-03-11 2017-10-12 Mtu Friedrichshafen Gmbh Zuführungsanordnung zur Einleitung von rückgeführtem Abgas
US10119503B2 (en) * 2016-03-25 2018-11-06 Ford Global Technologies, Llc Method and system for vacuum generation in an intake
WO2017178861A1 (fr) * 2016-04-13 2017-10-19 Volvo Truck Corporation Dispositif de régulation d'écoulement entre une première ligne et une seconde ligne
CN108131221B (zh) * 2017-12-20 2020-06-02 广州汽车集团股份有限公司 汽油机用废气再循环***及控制方法
CN109653905B (zh) * 2018-12-29 2021-01-05 天津大学 配有可变喉口直径文丘里管的船机egr***及使用方法
CN110878729B (zh) * 2019-12-10 2020-10-30 潍柴动力股份有限公司 一种发动机用废气文丘里管自清洁的方法及***
US11230959B2 (en) 2020-01-08 2022-01-25 Cnh Industrial America Llc Aspiration system for a work vehicle including an adjustably-sized venturi section

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2326235A1 (fr) * 1975-10-01 1977-04-29 Renault Buse elastique a debit variable
GB2266340A (en) * 1992-04-16 1993-10-27 Halton Oy Air flow regulating and silencing apparatus
DE4429232C1 (de) * 1994-08-18 1995-09-07 Daimler Benz Ag Vorrichtung zur Abgasrückführung für eine aufgeladene Brennkraftmaschine
JPH08319901A (ja) * 1995-05-25 1996-12-03 Yamaha Motor Co Ltd 過給機付内燃機関の排気再循環装置
US6886544B1 (en) * 2004-03-03 2005-05-03 Caterpillar Inc Exhaust gas venturi injector for an exhaust gas recirculation system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5611204A (en) * 1993-11-12 1997-03-18 Cummins Engine Company, Inc. EGR and blow-by flow system for highly turbocharged diesel engines
DE19852389A1 (de) * 1998-11-13 2000-05-18 Fev Motorentech Gmbh Kolbenbrennkraftmaschine mit drosselfreier Laststeuerung und Einrichtung zur Erzeugung eines Unterdrucks
SE9902966L (sv) 1999-08-23 2000-11-27 Motortestct Mtc Ab Anordning för överföring av avgaser från en överladdad förbränningsmotors avgassamlare till dess inloppsledning
SE521968C2 (sv) * 2000-05-22 2003-12-23 Scania Cv Ab Förfarande och anordning för avgasrecirkulering i en förbränningsmotor jämte dylik motor
US6343594B1 (en) * 2000-06-01 2002-02-05 Caterpillar Inc. Variable flow venturi assembly for use in an exhaust gas recirculation system of an internal combustion engine
SE517251C2 (sv) * 2000-08-30 2002-05-14 Gustav Berggren Komponent för reglering av avgasåterflöde
US6886545B1 (en) * 2004-03-05 2005-05-03 Haldex Hydraulics Ab Control scheme for exhaust gas circulation system
US20060124116A1 (en) * 2004-12-15 2006-06-15 Bui Yung T Clean gas injector

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2326235A1 (fr) * 1975-10-01 1977-04-29 Renault Buse elastique a debit variable
GB2266340A (en) * 1992-04-16 1993-10-27 Halton Oy Air flow regulating and silencing apparatus
DE4429232C1 (de) * 1994-08-18 1995-09-07 Daimler Benz Ag Vorrichtung zur Abgasrückführung für eine aufgeladene Brennkraftmaschine
JPH08319901A (ja) * 1995-05-25 1996-12-03 Yamaha Motor Co Ltd 過給機付内燃機関の排気再循環装置
US6886544B1 (en) * 2004-03-03 2005-05-03 Caterpillar Inc Exhaust gas venturi injector for an exhaust gas recirculation system

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2917131A1 (fr) * 2007-06-06 2008-12-12 Renault Sas Moteur a combustion interne comportant un dispositif apte a animer d'un mouvement tourbillonnaire ordonne les gaz d'echappement recircules injectes.
FR2921433A1 (fr) * 2007-09-25 2009-03-27 Mann & Hummel Gmbh Dispositif de mise en tourbillonnement et de melange de gaz d'echappement recycles dans la tubulure d'aspiration d'un moteur a combustion interne.
EP2050949A1 (fr) * 2007-09-25 2009-04-22 Mann+Hummel Gmbh Dispositif de mise en tourbillonement et de mélange de gaz d'échappement
FR2929677A1 (fr) * 2008-04-02 2009-10-09 Renault Sas Dispositif d'obturation d'un conduit.
ITMI20091080A1 (it) * 2009-06-18 2010-12-19 Dellorto Spa Sistema ed apparecchiatura di controllo di egr nell'impianto di alimentazione di motori a combustione interna sovralimentati
EP2278141A1 (fr) * 2009-06-18 2011-01-26 Dell'orto S.P.A. Dispositif et procédé de controle du taux de Egr dans un moteur à combustion interne
WO2011061051A1 (fr) * 2009-11-19 2011-05-26 Pierbrug Gmbh Dispositif de réglage permettant de convertir un mouvement rotatif en un mouvement linéaire
WO2011067138A1 (fr) * 2009-12-01 2011-06-09 Pierbrug Gmbh Ensemble soupape pour moteur à combustion interne
US9016266B2 (en) 2009-12-01 2015-04-28 Pierburg Gmbh Valve device for an internal combustion engine
EP2823175B1 (fr) * 2012-03-06 2017-03-15 Pierburg GmbH Dispositif d'admission de gaz d'échappement pour un moteur à combustion interne
DE202015002208U1 (de) * 2015-03-21 2016-06-23 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Verbrennungsmotor
FR3060664A1 (fr) * 2016-12-21 2018-06-22 Valeo Systemes De Controle Moteur Ensemble de circulation de gaz d’echappement d’un moteur thermique
FR3060665A1 (fr) * 2016-12-21 2018-06-22 Valeo Systemes De Controle Moteur Ensemble de circulation de gaz d'echappement d'un moteur thermique

Also Published As

Publication number Publication date
DE102006009153A1 (de) 2007-08-30
EP1826391A3 (fr) 2010-09-01
US7353811B2 (en) 2008-04-08
US20070199549A1 (en) 2007-08-30

Similar Documents

Publication Publication Date Title
EP1826391A2 (fr) Dispositif de recyclage des gaz d'échappement
EP1875061B1 (fr) Dispositif de recyclage des gaz d'echappement
DE102010008411B4 (de) Turbine für einen Abgasturbolader
EP1875062B1 (fr) Moteur a combustion interne a recyclage des gaz d'echappement
DE102014114968B4 (de) Regelvorrichtung für eine Verbrennungskraftmaschine
EP2211048B1 (fr) Dispositif de clapets de gaz d'échappement et système de récupération thermique à l'échappement d'un moteur à combustion interne
WO2006133838A1 (fr) Turbine a gaz d'echappement d'un turbocompresseur a gaz d'echappement
DE102011075528A1 (de) Ventilansteuerungsvorrichtung
DE102017209598A1 (de) Verdichter, Abgasturbolader und Brennkraftmaschine
WO2013124023A1 (fr) Collecteur d'échappement
EP0731878B1 (fr) Dispositif de regulation du regime de ralenti d'un moteur a combustion interne
DE102005041146A1 (de) Ventil, insbesondere Drehkolbenventil, und Abgasrückführsystem mit einem solchen Ventil
DE102010020709A1 (de) Steuereinrichtung für eine turboaufgeladene Verbrennungskraftmaschine
DE102006025889A1 (de) Saugkanal für die Verbrennungsluft einer Brennkraftmaschine
DE102016214784A1 (de) Ventileinrichtung einer Brennkraftmaschine
DE102011011451B4 (de) Betätigungseinrichtung für einen Abgasturbolader
DE102004003208A1 (de) Verdichter im Ansaugtrakt einer Brennkraftmaschine
DE102015118469A1 (de) Ventileinheit
DE102006024784B4 (de) Abgasrückführsystem für eine Brennkraftmaschine
DE102014102636A1 (de) Abgasturbolader mit einer Umblaseeinrichtung
DE102013103507A1 (de) Regelvorrichtung für einen Abgasführungsabschnitt einer Turbine
DE102018115843A1 (de) Verstelleinheit für eine Querschnittsänderungseinheit, insbesondere für einen Luftführungsabschnitt eines Abgasturboladers, Luftführungsabschnitt für einen Abgasturbolader und Abgasturbolader
DE102005019939A1 (de) Verdichter im Ansaugtrakt einer Brennkraftmaschine
DE102008049019A1 (de) Saugrohr einer Brennkraftmaschine
DE10314236A1 (de) Sauganlage für eine Brennkraftmaschine

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK RS

AKY No designation fees paid
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20110302