EP0942166B1 - Mehrzylindrige Brennkraftmaschine mit Abgasrückführung - Google Patents
Mehrzylindrige Brennkraftmaschine mit Abgasrückführung Download PDFInfo
- Publication number
- EP0942166B1 EP0942166B1 EP99102586A EP99102586A EP0942166B1 EP 0942166 B1 EP0942166 B1 EP 0942166B1 EP 99102586 A EP99102586 A EP 99102586A EP 99102586 A EP99102586 A EP 99102586A EP 0942166 B1 EP0942166 B1 EP 0942166B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- exhaust gas
- cylinder
- return
- inlet
- 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.)
- Expired - Lifetime
Links
- 238000002485 combustion reaction Methods 0.000 claims description 26
- 238000007789 sealing Methods 0.000 claims description 19
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
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
- F02M26/65—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
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B31/00—Modifying induction systems for imparting a rotation to the charge in the cylinder
- F02B31/08—Modifying induction systems for imparting a rotation to the charge in the cylinder having multiple air inlets
- F02B31/085—Modifying induction systems for imparting a rotation to the charge in the cylinder having multiple air inlets having two inlet 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
- 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
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/38—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with two or more EGR valves disposed in parallel
-
- 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
- F02M26/42—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories having two or more EGR passages; EGR systems specially adapted for engines having two or more cylinders
-
- 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
Definitions
- the invention relates to a multi-cylinder internal combustion engine with at least one inlet channel per cylinder, through which in addition to fresh gas and exhaust gas Internal combustion engine is traceable in the cylinder and being for each cylinder in an exhaust gas recirculation duct opening into the inlet duct recirculated exhaust gas quantity determining control valve is provided, and starts from DE 43 10 839 A1.
- EGR external exhaust gas recirculation
- the cylinder intake ports are reinserted into the cylinder combustion chambers.
- each Cylinders with different inflow characteristics can be desired to use the recirculated exhaust gas only via one of these (e.g. two) Introduce inlet channels into the combustion chamber.
- one of the inlet channels be designed as a so-called swirl channel, i.e. Have measures with Help of those who put the charge introduced through this inlet duct under one swirl related to the longitudinal axis of the cylinder flows into the combustion chamber.
- the other inlet port (s) may be one be so-called filling channel and consequently the lowest possible flow resistance exhibit.
- the exhaust gas to be recycled is introduced into the filling channel, that it is alternatively but can also be of particular advantage, the exhaust gas to be recycled to be introduced into the cylinder combustion chamber via a swirl duct. Then namely the recirculated exhaust gas in the cylinder comes into the best possible contact with the Cylinder wall and heats this, which improves the preparation of the in result in the fresh gas / fuel mixture introduced into the cylinder can. But the mixture formation and Combustion in the cylinder combustion chamber can be improved if the recirculated Exhaust gas is supplied via a swirl duct.
- FIG. 1 shows a longitudinal section (section AA from FIG. 2) of an exhaust gas recirculation unit according to the invention being shown in FIG. 1.
- FIG. 2 shows the section BB from FIG. 1.
- FIG. 3 shows a basic illustration of a section of a multi-cylinder internal combustion engine with cylinder-specific exhaust gas recirculation (EGR) and is first explained.
- EGR exhaust gas recirculation
- the reference number 1 denotes an internal combustion engine, which has several cylinder 2 arranged in series. Each cylinder 2 has two intake ports 3a, 3b and an outlet channel 4 assigned, which - as usual - to Cylinder combustion chamber can be closed by lift valves, not shown are. All intake ports 3a, 3b of all cylinders 2 are from a suction system 5 supplied with fresh gas, in addition is in each inlet channel 3a of each cylinder 2 to be returned to the combustion chambers via a return duct 6 Exhaust gas can be introduced, which from the previously via the exhaust channels 4 of all cylinders 2 exhaust gas flow was branched off. With the traceable The return channels 6 are supplied with exhaust gas by an exhaust manifold, not shown in Fig. 3, i.e. in this exhaust gas distribution room, which bears the reference number 11 in FIGS. 1, 2 becomes a Part of the exhaust gas flow initiated.
- each return duct 6 of each cylinder 2 there is a recirculated exhaust gas quantity determining control valve 7 (also cylinder-specific EGR control valve 7) provided, with the help of which it is possible to set whether and how much exhaust gas enters the associated inlet duct 3a. Will be in certain Operating points of the internal combustion engine (as usual) no exhaust gas in the cylinders 2 are returned, because of the then closed Control valves 7, the intake ports 3a of all cylinders 2 via the return channels 6 not in a fluid dynamic connection, just like this is desired.
- a recirculated exhaust gas quantity determining control valve 7 also cylinder-specific EGR control valve 7
- the return channels 6 are at least two side by side Cylinder 2 of internal combustion engine 1 is structurally a so-called exhaust gas recirculation unit 10 (also called EGR unit 10 for short), in which are also arranged the jointly operated control valves 7.
- This EGR unit 10 is shown in FIGS. 1 and 2 and is explained below.
- the EGR unit 10 shown is a those for a four-cylinder in-line internal combustion engine after the EGR unit 10 four side by side, i.e. arranged in a row Has return channels 6.
- a single so-called Exhaust gas distribution space 11 is provided, from which the return channels 6 to branch off, i.e. the inlet opening 8 of each return duct 6 lies in the distribution space 11, via an inlet opening provided in the EGR unit 10 9 exhaust gas can be fed to the internal combustion engine.
- each return channel 6 opens into one Intake port 3a of a cylinder 2 of the four-cylinder in-line internal combustion engine 1, which is not shown in FIG. 1, however, and why in FIG. 3 and reference is made to the explanations above.
- the EGR unit 10 is constructed from two housing parts 12a, 12b, which the Limit distribution space 11 and to the (lower) regionally trough-shaped Housing part 12a integrally formed the return channels 6 for which the other (upper) housing part 12b is a cover part forms.
- the inlet opening 9 is also provided, via which exhaust gas of the internal combustion engine into the distribution space 11 is introduced.
- a sealing cone trained control valves 7 arranged, with the aid of which the inlet openings 8 of the return channels 6 can be blocked more or less.
- Each return channel 6 has its own sealing cone control valve 7 of this type assigned, which is also simply referred to below as the sealing cone 7 become.
- Each inlet opening 8 is suitably designed or conically shaped here, so that when the sealing cone 7 on the wall of the inlet opening 8 rests, the connection between the associated return channel 6 and the exhaust manifold 11 is interrupted.
- Each sealing cone 7 is also slidable in the cone axis direction 13 and thus from the wall of the Inlet opening 8 can be lifted off, so that exhaust gas from the distribution space 11 in can flow in the associated return duct 6.
- the amount of the exhaust gas entering the return duct 6 by the degree of lift-off each sealing cone 7 from the wall of the associated inlet opening 8 determined, i.e. the further according to arrow direction 14 of the sealing cone 7 (or that Control valve 7) is removed from the inlet opening 8, the more exhaust gas can get from the distribution space 11 into the corresponding return duct 6.
- all of the sealing cone control valves 7 of the EGR unit 10 on an (at least essentially) in the taper axis direction 13 (i.e. in or against the direction of arrow 14) slidable plate 15 arranged is also located within the distribution room 11. It is also planned an actuator designated in its entirety with 16, with the help of which Positioning plate 15 is movable as mentioned. With an appropriate actuation of the single actuator 16 can thus all sealing cone control valves 7 are positioned essentially the same way, so that over the return channels 6 all the internal combustion engine cylinders 2 essentially the same amount of exhaust gas can be supplied.
- each sealing cone 7 is by means of a slightly resilient Clip element 17a in a suitable recess 15a of the setting plate 15 clipped in, between the one opposite the clip element 17a Side of the plate 15 and the unspecified cone section of the sealing cone 7, a compression spring element 17b is clamped. In this way it is ensured that at least in the closed position Sealing cone control valves 7 all sealing cones 7 the associated orifices 8 of the return channels 6 100 percent compared to the distribution room Shut off 11.
- the actuator 16 is an electric motor actuated actuator rod 16a, on which the adjusting plate 15 rests.
- Latter is provided with guide pins 15b, which in guide receptacles 12c, which on the inside of the (upper) housing part 12b of the EGR unit 10 are provided, are guided displaceably in the taper axis direction 13.
- a helical compression spring 18 is also provided for each guide receptacle 12c, clamped between the housing part 12b and the adjusting plate 15 is so that the adjusting plate 15 is always supported on the actuator rod 16a, which, as can be seen, face away from the helical compression springs 18 Side of the plate 15 is located.
- the actuator rod 16a itself is in its section facing away from the adjusting plate 15 formed as a rack 16b and projects with this rack section 16b out of the (lower) housing part 12a of the EGR unit.
- the pinion 16c of an electric motor shaft meshes with this rack section 16b 16d (see FIG. 2) of an electric motor, not shown.
- the described EGR unit 10 is characterized by an extreme simple construction from what also the functional safety and reliability is beneficial.
- the cylinder-specific can be done in a simple manner
- FIG. 3 It can be seen here that the cylinder-side end of the inlet channel 3a in in a swirl generating manner, i.e. the inlet duct 3a provides a so-called swirl channel according to the second and third paragraph of the introduction (see above), while the other inlet channel 3b as one Filling channel optimized with regard to minimal flow resistance functions.
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)
Description
Die Lösung dieser Aufgabe ist dadurch gekennzeichnet, daß die Rückführkanäle zumindest zweier nebeneinander liegender Zylinder baulich zu einer Abgasrückführ-Einheit (AGR-Einheit) zusammengefasst sind, in der auch die gemeinsam betätigten Steuerventile angeordnet sind. Vorteilhafte Aus- und Weiterbildungen sind Inhalt der Unteransprüche.
Figur 2 zeigt den Schnitt B-B aus Fig. 1.
Figur 3 zeigt in einer Prinzipdarstellung einen Ausschnitt einer mehrzylindrigen Brennkraftmaschine mit zylinderindividueller Abgasrückführung (AGR) und wird zunächst erläutert.
- 1
- Brennkraftmaschine
- 2
- Zylinder
- 3a
- Einlaßkanal (Drallkanal)
- 3b
- Einlaßkanal (Füllkanal)
- 4
- Auslaßkanal
- 5
- Sauganlage
- 6
- (Abgas-) Rückführkanal
- 7
- Steuerventil (= Dichtkegel)
- 8
- Eintrittsöffnung (von 6 in 10, 11)
- 9
- Einlaßöffnung (von 10)
- 10
- Abgasrückführ-Einheit (AGR-Einheit)
- 11
- (Abgas-) Verteilerraum
- 12a
- (unteres) Gehäuseteil (von 10)
- 12b
- (oberes) Gehäuseteil (von 10)
- 12c
- Führungsaufnahme
- 13
- Kegelachsrichtung (von 7)
- 14
- Pfeilrichtung
- 15
- Stellplatte
- 15a
- Aussparung
- 15b
- Führungsstift
- 16
- Stellorgan
- 16a
- Stellerstange
- 16b
- Zahnstangenabschnitt
- 16c
- Ritzel
- 16d
- Elektromotorwelle
- 16e
- Stellorgan-Gehäuse
- 17a
- Clipselement
- 17b
- Druckfederelement
- 18
- Schraubendruckfeder
Claims (6)
- Mehrzylindrige Brennkraftmaschine mit zumindest einem Einlaßkanal (3a) je Zylinder (2), über den neben Frischgas auch Abgas der Brennkraftmaschine (1) in den Zylinder rückführbar ist und wobei für jeden Zylinder (2) in einem im Einlaßkanal (3a) mündenden Abgas-Rückführkanal (6) ein die rückgeführte Abgasmenge bestimmendes Steuerventil (7) vorgesehen ist,
dadurch gekennzeichnet, daß die Rückführkanäle (6) zumindest zweier nebeneinander liegender Zylinder (2) baulich zu einer Abgasrückführ-Einheit (AGR-Einheit 10) zusammengefasst sind, in der auch die gemeinsam betätigten Steuerventile (7) angeordnet sind. - Brennkraftmaschine nach Anspruch 1,
dadurch gekennzeichnet, daß die Abgasrückführ-Einheit (AGR-Einheit 10) einen Verteilerraum (11) aufweist, in den das rückzuführende Abgas über eine Einlaßöffnung (9) einleitbar ist, und von dem die zu den Zylinder-Einlaßkanälen (3a) führenden Rückführkanäle (6) abzweigen, wobei die geeignet gestalteten Eintrittsöffnungen (8) der Rückführkanäle (6) vom Verteilerraum (11) aus durch die als Dichtkegel ausgebildeten Steuerventile (7) mehr oder weniger versperrbar sind. - Brennkraftmaschine nach Anspruch 2,
dadurch gekennzeichnet, daß die Dichtkegel (7) auf einer im wesentlichen in Kegelachsrichtung (13) verschiebbaren Stellplatte (15) angeordnet sind. - Brennkraftmaschine nach Anspruch 3,
dadurch gekennzeichnet, daß die Dichtkegel (7) ihrerseits gegenüber der Stellplatte (15) jeweils gegen Federkraft geringfügig in Kegelachsrichtung (13) verschiebbar sind. - Brennkraftmaschine nach einem der vorangegangenen Ansprüche,
dadurch gekennzeichnet, daß die Abgasrückführ-Einheit (AGR-Einheit 10) mit einem Stellorgan (16) zum Verschieben der Stellplatte (15) versehen ist. - Brennkraftmaschine nach einem der vorangegangenen Ansprüche mit zumindest zwei Einlaßkanälen (3a, 3b) je Zylinder (2), von denen einer als Drallkanal ausgebildet ist,
dadurch gekennzeichnet, daß die Rückführkanäle (6) der Abgasrückführ-Einheit (AGR-Einheit 10) in die Drallkanäle der Zylinder münden.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19810840 | 1998-03-12 | ||
DE19810840A DE19810840A1 (de) | 1998-03-12 | 1998-03-12 | Mehrzylindrige Brennkraftmaschine mit Abgasrückführung |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0942166A2 EP0942166A2 (de) | 1999-09-15 |
EP0942166A3 EP0942166A3 (de) | 2000-03-22 |
EP0942166B1 true EP0942166B1 (de) | 2003-05-02 |
Family
ID=7860710
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99102586A Expired - Lifetime EP0942166B1 (de) | 1998-03-12 | 1999-02-11 | Mehrzylindrige Brennkraftmaschine mit Abgasrückführung |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0942166B1 (de) |
DE (2) | DE19810840A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19847288B4 (de) * | 1998-10-14 | 2014-12-11 | Pierburg Gmbh | Abgasrückführventil für eine Brennkraftmaschine |
DE19900640C1 (de) * | 1999-01-11 | 2000-05-18 | Siemens Ag | Abgasrückführanlage für eine mehrzylindrige Brennkraftmaschine |
FR2860555B1 (fr) * | 2003-10-06 | 2005-12-23 | Renault Sa | Dispositif d'admission d'air pour moteur a combustion interne a charge stratifiee avec recyclage de gaz d'echappement |
DE102005017562A1 (de) * | 2005-04-16 | 2006-10-19 | Daimlerchrysler Ag | Abgasführungseinheit mit Abgaskrümmer und Steuerventil |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0635858B2 (ja) * | 1988-03-24 | 1994-05-11 | マツダ株式会社 | 圧力波過給機付エンジンの排気装置 |
DE3836723C1 (de) * | 1988-10-28 | 1989-06-01 | Daimler-Benz Aktiengesellschaft, 7000 Stuttgart, De | |
JP2587715B2 (ja) * | 1990-08-31 | 1997-03-05 | 日野自動車工業株式会社 | エンジンのegr装置 |
JPH05263719A (ja) * | 1992-03-17 | 1993-10-12 | Nippon Soken Inc | エンジンの排気環流装置 |
JPH06147021A (ja) * | 1992-11-10 | 1994-05-27 | Nippondenso Co Ltd | 排気ガス還流制御装置 |
DE4310839A1 (de) * | 1993-04-02 | 1994-10-06 | Bayerische Motoren Werke Ag | Luftverdichtende Einspritz-Brennkraftmaschine, insbesondere direkt einspritzende Dieselmaschine |
DE4338192C2 (de) * | 1993-11-09 | 1998-03-19 | Pierburg Ag | Elektromagnetisches Steuerventil für Abgasrückführung |
GB2292975A (en) * | 1994-09-10 | 1996-03-13 | Ford Motor Co | I.c. engine cylinder head exhaust recirculation |
DE19622891C2 (de) * | 1996-06-07 | 1998-04-09 | Ranco Inc | Abgasrückführungssystem |
DE19631337B4 (de) * | 1996-08-02 | 2007-03-01 | Audi Ag | Vorrichtung zur Abgasrückführung an einer Brennkraftmaschine |
-
1998
- 1998-03-12 DE DE19810840A patent/DE19810840A1/de not_active Withdrawn
-
1999
- 1999-02-11 EP EP99102586A patent/EP0942166B1/de not_active Expired - Lifetime
- 1999-02-11 DE DE59905275T patent/DE59905275D1/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE19810840A1 (de) | 1999-09-16 |
EP0942166A3 (de) | 2000-03-22 |
DE59905275D1 (de) | 2003-06-05 |
EP0942166A2 (de) | 1999-09-15 |
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