WO2014166646A1 - Ensemble soupape - Google Patents

Ensemble soupape Download PDF

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Publication number
WO2014166646A1
WO2014166646A1 PCT/EP2014/051689 EP2014051689W WO2014166646A1 WO 2014166646 A1 WO2014166646 A1 WO 2014166646A1 EP 2014051689 W EP2014051689 W EP 2014051689W WO 2014166646 A1 WO2014166646 A1 WO 2014166646A1
Authority
WO
WIPO (PCT)
Prior art keywords
exhaust gas
gas recirculation
valve
pressure exhaust
valve device
Prior art date
Application number
PCT/EP2014/051689
Other languages
German (de)
English (en)
Inventor
Swen-Juri Bauer
Liudmilla POTOZKI
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 WO2014166646A1 publication Critical patent/WO2014166646A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
    • 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
    • F02M26/02—EGR systems specially adapted for supercharged engines
    • F02M26/04—EGR systems specially adapted for supercharged engines with a single turbocharger
    • F02M26/06—Low pressure loops, i.e. wherein recirculated exhaust gas is taken out from the exhaust downstream of the turbocharger turbine and reintroduced into the intake system upstream 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
    • F02M26/52—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
    • F02M26/65—Constructional details of EGR valves
    • F02M26/66—Lift valves, e.g. poppet valves
    • F02M26/69—Lift valves, e.g. poppet valves having two or more valve-closing members

Definitions

  • the present invention relates to a valve device for controlling an exhaust gas recirculation rate according to the preamble of claim 1.
  • the invention also relates to a supercharged internal combustion engine having such a valve device.
  • Exhaust gas aftertreatment for example by an SCR catalyst, has proved to be inadequate.
  • a variety of high-pressure exhaust gas recirculation systems are already in use, but reduce, for example, in a supercharged internal combustion engine, the exhaust gas turbocharger available exhaust gas mass flow, which is only able to provide a reduced compressor capacity in the situation.
  • the recirculated exhaust gases in high-pressure exhaust gas recirculation systems are often taken directly from the engine and thus comparatively hot, so that they must be cooled before re-feeding into the engine, which in turn requires an increased energy demand. In so-called
  • the recirculating exhaust gas is removed downstream of an exhaust gas turbocharger or a diesel particulate filter and introduced upstream of the compressor back into the intake. Since here the
  • Temperatures of the recirculated exhaust gases are only about 350 ° C to 500 ° C, can be dispensed with a complex cooling the same.
  • combined exhaust gas recirculation systems are known with which either a high-pressure exhaust gas recirculation or a low-pressure exhaust gas recirculation are possible. In such combined
  • Exhaust gas recirculation systems thus require two valve devices for separately controlling the respective exhaust gas recirculation flows, as a result of which usually also two adjusting devices for respectively adjusting the valve devices are required.
  • Such combined exhaust gas recirculation systems are thus structurally relatively expensive and therefore expensive.
  • the present invention deals with the problem for a
  • Valve device of the generic type to provide an improved embodiment, which offers in particular a cost-effective and space-optimized alternative to the previously used in combined exhaust gas recirculation systems two separate valve devices.
  • the present invention is based on the general idea of a combined exhaust gas recirculation system according to the invention
  • Use valve device having two valve piston and thereby is able to both a high pressure exhaust gas recirculation over a
  • the exhaust gas recirculation can be carried out according to the state of the internal combustion engine either in the high-pressure region or in the low-pressure region.
  • the exhaust gas recirculation preferably takes place in the high pressure region during the cold start phase. As a result, a faster heating of the Internal combustion engine to the required operating temperature.
  • Exhaust gas recirculation into the low-pressure region takes place after the cold start phase, when the internal combustion engine has reached the required operating temperature.
  • the exhaust gas recirculation takes place in the low-pressure range both in partial load operation, as well as in full load operation.
  • Valve device is designed in this case as a so-called two-piston valve and able to replace the previously two separate valve devices. Compared to the previously required two separate valve devices in combined exhaust gas recirculation systems provides the invention
  • Valve device has the great advantages that it builds comparatively compact due to the closely adjacent arrangement of the two valve piston and thereby space-optimized design, and only a single actuator for common adjustment of the two valve piston requires, whereby an actuator can be saved in previously two separate valve devices , This makes it possible to construct the valve device according to the invention in comparison to previous two separate valve devices not only more compact, but also also significantly cheaper. By eliminating the previously required second adjusting device can also be a
  • the adjusting device has an electric servo motor which has an actuator with radially extending slots, for example a control lever, in each of which a control slide coupled to the respective valve piston is suspended.
  • an electric servo motor By energizing the electric servomotor this thus adjusts the adjusting lever, whereupon a valve piston in the one and the other valve piston are simultaneously adjusted in the opposite direction.
  • a common and simultaneously simultaneous adjustment of the two valve piston via only a single common actuating device is possible.
  • the respective valve piston is in the respective associated
  • Exhaust gas recirculation channel i. in the high-pressure exhaust gas recirculation passage or the low-pressure exhaust gas recirculation passage, for closing the same
  • a piston ring is arranged, which guides the respective valve piston, cleans and at the same time an annular gap between the valve piston and the associated
  • a housing of the valve device is formed from undercut-free die-cast parts.
  • the invention is further based on the general idea, in a
  • valve device according to the invention offers a whole series of advantages not previously achievable with two separate valve devices: On the one hand, only one single valve device according to the invention is required which, in comparison to the previously required two, separate
  • Valve devices has a significantly lower space requirement and a significantly lower weight. Due to the omission of the previously required second adjusting device can also realize significant cost advantages.
  • piston rings By arranged in the respective exhaust gas recirculation channel piston rings also a self-cleaning of the valve piston, a guide thereof and a sealing function is realized by only a single component.
  • the valve device according to the invention is also a very precise control or regulation of a high-pressure exhaust gas recirculation rate or a
  • Fig. 1 is a schematic representation of a charged
  • Fig. 2 shows a possible installation location of the invention
  • FIG. 4 shows a representation of an undercut-free die-cast part of FIG.
  • exhaust gas recirculation line 7 now branches off the exhaust gas line 5 downstream of the turbine 3 of the exhaust gas turbocharger 2 and flows upstream of the exhaust gas line Compressor 4 in the intake manifold 6 and is thus a
  • Exhaust gas recirculation line 7 arranged a valve device 8 for controlling / regulating an exhaust gas recirculation rate.
  • a particulate filter 9 is also arranged, wherein in the region of the exhaust gas recirculation line 7 and des
  • Low pressure exhaust gas recirculation channel 12 in addition an exhaust gas recirculation cooler 10 is arranged.
  • the internal combustion engine 1 according to the invention according to FIG. 1 also has a high-pressure exhaust gas recirculation passage 11, which leads directly to the valve device 8 and via this into the intake line 6
  • Internal combustion engine 1 generally two exhaust gas recirculation lines 7,7 ', namely a high pressure exhaust gas recirculation channel 1 1 and a
  • Low pressure exhaust gas recirculation passage 12 an exhaust pressure of about 1, 1 to 1, 5 bar and a temperature of about 350 ° C to 500 ° C prevail.
  • a temperature of up to 900 ° C. in the low-pressure exhaust gas recirculation passage 12 may also prevail for a short time.
  • the high pressure exhaust gas recirculation channel 1 a comparatively high pressure between 2 and 3 bar, and a comparatively high temperature between 500 ° C and 800 ° C before.
  • Exhaust gas recirculation which alternatively allows the return of high-pressure exhaust gas or low-pressure exhaust gas.
  • a charge air cooler 13 may be arranged beyond.
  • valve device 8 As a possible installation location for the valve device 8 according to the invention, an adjacent area to the engine block 14 (see FIG Internal combustion engine 1 on. As a result, in particular short lines between the exhaust gas turbocharger 2, the exhaust line 5 and the intake manifold 6 can be achieved. In addition, a direct attachment of an adjusting device 17 on the engine block 14 is possible, which is required for adjusting the valve device 8.
  • Valve device 8 according to the figures 3a to 3c, it can be seen that the valve device 8 is designed as a two-piston valve, via a first valve piston 15 is a high-pressure exhaust gas recirculation over the
  • Low pressure exhaust gas recirculation channel 12 is controllable.
  • Both valve pistons 15, 16 are connected via an adjusting device 17, such as an electric servomotor, together and simultaneously adjustable simultaneously.
  • the adjusting device 17 has an adjusting member 18, for example an adjusting lever, with radially extending oblong holes 19, in each of which a control slide 20, 21 coupled to the respective valve pistons 15, 16 is suspended.
  • the actuator 18 is rotated by the adjusting device 17, for example, from the starting position shown in FIG. 3a clockwise, the two valve piston 15, 16, which are arranged parallel to each other, in
  • FIG. 3b in which the high pressure exhaust gas recirculation is closed because the valve piston 15 is inserted into the associated high pressure exhaust gas recirculation passage 1 1, whereas the low pressure exhaust gas recirculation passage 12 is opened because the second valve piston 16 is pulled out of this.
  • the actuator 18 in an opposite rotational adjustment of the actuator 18, as shown in FIG. 3c, the high pressure exhaust gas recirculation open, whereas the
  • Piston ring 22 is arranged, which not only leads the respective valve piston 15,16, but at the same time also strikes off when pushing through and thus cleans and at the same time an annular gap between the valve piston 15, 16 and the respective exhaust gas recirculation passage 1 1, 12 seals.
  • a second piston ring 22 'and a bearing 23 may be provided. Between the bearing 23 and the respective valve piston 15, 16 while a Schmutzsammeitopf 24 is arranged, which prevents the passage of dirt, such as soot particles, in the direction of the adjusting device 17 of the bearing 23. Between the respective bearing 23 and a
  • a seal 28 is also arranged, which prevents exhaust gases in the control or in the area of
  • Setting device 17 can penetrate.
  • valve piston 15, 16 may be formed for example of ceramic or metal and thereby have a comparatively long life.
  • the valve device 8 according to the invention is significantly more compact compared to two previously required separate valve devices and thus requires a significantly reduced space requirement compared to previously two separate valve devices, which is particularly in modern engine compartments of great advantage.
  • Low pressure exhaust gas recirculation or high pressure exhaust gas recirculation may be formed, in particular to the prevailing there temperatures.
  • the housing 25 of the valve device 8 according to the invention is formed from undercut-free die-cast parts 26, as shown for example in accordance with FIG. 4.
  • the die-cast part 26 are already corresponding grooves 27 for the
  • Piston rings 22 and 22 'and seals 28 are provided so that they can be easily mounted and at the same time reliably fixed in the housing 25.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Exhaust-Gas Circulating Devices (AREA)

Abstract

L'invention concerne un ensemble soupape (8) servant à commander/réguler un taux de recyclage des gaz d'échappement. Selon l'invention, l'ensemble soupape (8) est conçu comme une soupape à deux pistons, un premier piston de soupape (15) servant à commander un retour de gaz d'échappement haute pression par un conduit de retour de gaz d'échappement haute pression (11) et un deuxième piston de soupape (16) servant à commander un retour de gaz d'échappement basse pression par un conduit de retour de gaz d'échappement basse pression (12). L'ensemble soupape (8) selon l'invention est ainsi optimisé en termes d'encombrement, de poids et de coûts.
PCT/EP2014/051689 2013-04-11 2014-01-29 Ensemble soupape WO2014166646A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013206481.0 2013-04-11
DE201310206481 DE102013206481A1 (de) 2013-04-11 2013-04-11 Ventileinrichtung

Publications (1)

Publication Number Publication Date
WO2014166646A1 true WO2014166646A1 (fr) 2014-10-16

Family

ID=50033518

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/051689 WO2014166646A1 (fr) 2013-04-11 2014-01-29 Ensemble soupape

Country Status (2)

Country Link
DE (1) DE102013206481A1 (fr)
WO (1) WO2014166646A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3644977A1 (de) * 1986-09-05 1988-06-30 Bochumer Eisen Heintzmann Kolbenschieberventil
WO2001083975A1 (fr) * 2000-05-03 2001-11-08 Cooperstandard Automotive Fluid Systems Appareil de soupape rge
DE102006008524A1 (de) * 2005-02-22 2006-08-31 Voss Automotive Gmbh Mehrwege-Ventilanordnung
WO2009115975A2 (fr) * 2008-03-17 2009-09-24 Dell'orto S.P.A. Soupape de recirculation des gaz d’échappement pour la recirculation de gaz d’échappement jusqu’à la tubulure d’admission de moteurs à combustion interne
DE102010006037A1 (de) * 2010-01-27 2011-07-28 Pierburg GmbH, 41460 Ventilvorrichtung für eine Verbrennungskraftmaschine
EP2365196A1 (fr) * 2010-03-08 2011-09-14 Behr GmbH & Co. KG Soupape MTC

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10221711A1 (de) * 2002-05-16 2003-11-27 Pierburg Gmbh Ventilsystem

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3644977A1 (de) * 1986-09-05 1988-06-30 Bochumer Eisen Heintzmann Kolbenschieberventil
WO2001083975A1 (fr) * 2000-05-03 2001-11-08 Cooperstandard Automotive Fluid Systems Appareil de soupape rge
DE102006008524A1 (de) * 2005-02-22 2006-08-31 Voss Automotive Gmbh Mehrwege-Ventilanordnung
WO2009115975A2 (fr) * 2008-03-17 2009-09-24 Dell'orto S.P.A. Soupape de recirculation des gaz d’échappement pour la recirculation de gaz d’échappement jusqu’à la tubulure d’admission de moteurs à combustion interne
DE102010006037A1 (de) * 2010-01-27 2011-07-28 Pierburg GmbH, 41460 Ventilvorrichtung für eine Verbrennungskraftmaschine
EP2365196A1 (fr) * 2010-03-08 2011-09-14 Behr GmbH & Co. KG Soupape MTC

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Publication number Publication date
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