EP2288802A1 - Abgasrückführvorrichtung für eine verbrennungskraftmaschine - Google Patents
Abgasrückführvorrichtung für eine verbrennungskraftmaschineInfo
- Publication number
- EP2288802A1 EP2288802A1 EP09749702A EP09749702A EP2288802A1 EP 2288802 A1 EP2288802 A1 EP 2288802A1 EP 09749702 A EP09749702 A EP 09749702A EP 09749702 A EP09749702 A EP 09749702A EP 2288802 A1 EP2288802 A1 EP 2288802A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- exhaust gas
- internal combustion
- combustion engine
- distributor element
- gas recirculation
- 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- Withdrawn
Links
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 46
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims 1
- 239000012530 fluid Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- RDYMFSUJUZBWLH-UHFFFAOYSA-N endosulfan Chemical compound C12COS(=O)OCC2C2(Cl)C(Cl)=C(Cl)C1(Cl)C2(Cl)Cl RDYMFSUJUZBWLH-UHFFFAOYSA-N 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/40—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories with timing means in the recirculation passage, e.g. cyclically operating valves or regenerators; with arrangements involving pressure pulsations
-
- 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
- F02M26/39—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 series
-
- 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
- F02M26/44—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 in which a main EGR passage is branched into multiple passages
-
- 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
- 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
- F02M26/20—Feeding recirculated exhaust gases directly into the combustion chambers or into the intake runners
-
- 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
- F02M26/70—Flap valves; Rotary valves; Sliding valves; Resilient valves
Definitions
- the invention relates to an exhaust gas recirculation device for an internal combustion engine with a Abgasmengenregler and with a housing in which an exhaust gas inlet and a plurality of cylinders of the internal combustion engine Abgasauslassöffitch are arranged, wherein between the exhaust gas inlet opening and the Abgasauslassö réelleen a movable distributor element is arranged, which corresponds to the rotational speed a camshaft of
- Internal combustion engine is driven and has a number corresponding to the number of Abgasauslassö réelleen outlet windows and at least one inlet window, so that via the distributor element, a fluidic connection of the exhaust gas inlet opening with one of the exhaust gas outlet openings can be produced.
- US Pat. No. 6,308,666 B1 discloses an exhaust gas recirculation system in which the exhaust gas recirculation takes place via a connection of the outlet lines of two cylinders assigned to one another.
- a tubular shift drum is arranged behind the exhaust manifold, which is coupled to the camshaft. This shift drum dominates the exhaust outlet of the internal combustion engine, so that by closing this exhaust outlet, the exhaust gas directly from Outlet valve of an ejecting cylinder is guided to the exhaust valve of a suctioning cylinder. It is thus also a form of internal exhaust gas recirculation, in which the exhaust gas quantity control takes place only via the opening of an additional vent valve.
- Cylinder-selective and accurate-cycle systems with external exhaust gas recirculation are poorly known. By introducing individual in the exhaust gas recirculation channels existing throttle bodies, each associated with a cylinder, lower pollutant emissions could be achieved because a more accurate residual gas control for each cylinder is possible.
- these known systems operate with a common operation for all individual exhaust gas recirculation channels, so that each exhaust gas recirculation lines are opened synchronously.
- Such a cylinder-selective recirculation is disclosed by DE 198 51 922 A1, in which behind an exhaust gas recirculation valve, a pipe is arranged in a bore of the intake manifold of the internal combustion engine, which can be rotated via an electric actuator.
- This tube which acts as a distributor element, has a number of openings, via which a connection can be made to an exhaust gas recirculation channel leading to the suction channel.
- the exhaust gas is returned to the cylinder at a late time, so that the charging disturbing vibrations can be avoided by recirculated exhaust gas in the intake manifold.
- a cycle-accurate feeding of the exhaust gas is not possible with this system.
- DE 37 22 048 A1 proposes an external exhaust gas recirculation device with a distributor element and an upstream exhaust gas recirculation valve in which the distributor element is coupled to the camshaft and rotates therewith, the housing having a number corresponding to the number of cylinders Exhaust outlet and an exhaust gas inlet opening, wherein in each case one of the exhaust gas outlet openings is fluidically connectable via the distributor element with the exhaust gas inlet opening.
- the plate-shaped or cup-shaped distributor element has for this purpose a single passage opening. Behind the outlet openings is in each case an exhaust gas channel, which leads to the inlet line of the cylinder head.
- the object is to provide an exhaust gas recirculation device which works cylinder-selective and cyclic synchronous, but eliminates the disadvantage of the large following volumes of the exhaust ports, so that gas-dynamic effects of compressible exhaust gas can be avoided and a high system dynamics is achieved.
- the individual cylinders should be able to be fed externally and close to the cylinder at the optimum time. The assembly effort and the number of components should be minimized simultaneously.
- the distributor element is tubular and has a number of outlet windows corresponding to the number of exhaust gas outlet openings which are distributed correspondingly to the ignition offset of the internal combustion engine over the circumference of the distributor element, wherein the exhaust gas outlet openings of the housing directly into the inlet channels of the cylinder head lead.
- the distributor element is connected via a coupling with the camshaft and rotates at the speed of the camshaft.
- additional drives are required by the coupling.
- the tubular distributor element is driven directly or indirectly via an electric motor with the speed of the camshaft, so that no chain or belt drives are necessary which in particular reduces the maintenance of the internal combustion engine. Furthermore, it is possible in a simple manner to phasing the angle of rotation of the camshaft.
- the housing of the distributor element is flanged to the intake manifold and the cylinder head of the internal combustion engine. This simplifies the leak-free installation in the internal combustion engine.
- the phase angle of the distributor element is displaceable in comparison with the camshaft via the electric motor or via a control element.
- an alternative to the fully variable valve train is created with respect to the control of the exhaust gas flow, for example, by upstream or downstream exhaust gas can be stored.
- an optimal time for the exhaust gas supply is adjustable depending on the load state of the internal combustion engine.
- the exhaust gas inlet opening is arranged at the axial end of the housing of the distributor element and the associated inlet window is formed by an axially open end of the tubular distributor element. This results in a particularly simple connection of the exhaust gas recirculation channel to the distributor element.
- the exhaust gas inlet opening with respect to the longitudinal extension of the distributor element centrally leads into an annular gap of the housing and the distribution element distributed over the circumference inlet windows are arranged, which are fluidly connected to the annular gap.
- the housing has a plurality of exhaust gas inlet openings, each of which is fluidically connectable to at least one inlet window of the distributor element, wherein the inlet windows are each arranged centrally between a pair of adjacent outlet windows and partition walls are arranged in the distributor element, each of the one inlet window associated pair outlet window from the adjacent Pair of outlet windows separates.
- the outlet windows are arranged corresponding to the ignition offset of the internal combustion engine on the circumference of the distributor element and the inlet windows to the associated outlet window with respect to the rotation according to the time required for the exhaust gas from the inlet window to the outlet window, offset forward.
- the exhaust gas flow to the respective cylinder always takes place in the same amount and at the optimum time.
- a constant filling of the cylinder is achieved with exhaust gas.
- the distributor element at its axial ends in each case a pin-shaped extension with a step, wherein on the pin part of larger diameter each between the housing and pin a seal is arranged and on the pin part of smaller diameter between Housing and pin each bearing is arranged.
- the exhaust gas quantity regulator is an exhaust gas recirculation valve, which is arranged in the exhaust gas inlet channel and can be designed, for example, as a cone valve. With such a valve, a precise amount of exhaust gas can be reliably metered.
- FIG. 1 shows a three-dimensional view of the distributor element of an exhaust gas recirculation device according to the invention with a cut-open housing.
- FIG. 2 shows the connection of the distributor element with the housing according to FIG. 1 to a suction tube of an internal combustion engine in a three-dimensional representation.
- Figure 3 shows a side view of the distributor element with housing according to Figure 1 in a sectional view.
- An exhaust gas recirculation device consists of an exhaust gas recirculation channel branching off from the exhaust manifold of the internal combustion engine, in which an exhaust gas quantity regulator is arranged, which is usually designed as a known exhaust gas recirculation valve, by means of which the recirculated exhaust gas quantity is regulated.
- this exhaust gas recirculation channel leads to an exhaust gas inlet opening 1 of a housing 2, in which a distributor element 3 is arranged.
- the distributor element 3 is tubular and has four inlet windows 4 and four outlet windows 5 for the exhaust gas flow.
- the number of inlet windows 4 and the outlet window 5 corresponds in each case to the number of cylinders of the internal combustion engine.
- a first pin-shaped extension 7 is formed, which, as can be seen in Figure 3, a step 8, so that a first pin portion 9 of larger diameter and a subsequent second pin portion 10 of smaller diameter is formed.
- a seal 11 is arranged, which seals the tubular distributor element 3 against the housing 2 to the outside, while on the second pin member 10, a bearing 12 is arranged, via which the distributor element 3 is rotatably mounted in the housing 2.
- a pin-shaped extension 14 is arranged with a step 15 in the same way, again on the pin member 16 of larger diameter, a seal 17 is arranged and on the pin member 18 of smaller diameter, a bearing 19 is arranged.
- the pin part 18 is made longer, so that it extends beyond the axial end of the housing 2.
- the distributor element 3 is connected to a control element 20 via this pin part 18 protruding beyond the housing 2.
- This control 20 is used in the present embodiment as a clutch 21 to a camshaft, not shown, of the internal combustion engine. This is done via a belt which runs on a pulley 22 of the control element 20, so that the rotation of the camshaft is transmitted via the belt first to the pulley 22 and from the pulley 22 to the distributor element 3 in the fixed housing 2, wherein the transmission between Camshaft and distributor element in the ratio 1: 1 done.
- the control element 20 is formed in the present embodiment as a phaser, so that by rotation of an electric motor 23 and a worm 24 disposed thereon, a ring gear 25 of a planetary gear 26 can be adjusted, whereby the rotation angle of a planetary carrier 27 which is fixedly disposed on the pin member 18, to the angle of rotation of the pulley 22 and thus also the angle of rotation of the distributor element 3 can be moved to the camshaft.
- the timing of the exhaust gas recirculation into the individual cylinders can be advanced or relocated via the control element 20 in comparison with the opening time of the intake valves of the internal combustion engine.
- the distributor element 3 has four inlet windows 4 and four outlet windows 5.
- the inlet windows 4 are approximately evenly distributed over the circumference of the distributor element 3 and arranged centrally with respect to the longitudinal extent of the distributor element 3 on the circumference of the distributor element 3.
- the inlet windows 4 correspond to an annular gap 31 formed on the housing 2, which is supplied with exhaust gas via the exhaust gas inlet opening 1, which is likewise designed centrally with respect to the longitudinal extent of the housing 2.
- more or fewer inlet windows 4 may be formed on the distributor element 3, however, the design with four inlet windows 4, which has the respective outlet windows 5 opposite to the advantage of a lower pressure loss.
- exhaust gas outlet openings 28 are formed on the housing 2 on the axially opposite side over the length of the housing 2, two of which are formed with respect to the longitudinal extent of the housing 2 on one side of the exhaust gas inlet opening 1 and two on the other side of the inlet opening 1.
- the exhaust gas outlet openings 28 correspond with the outlet windows 5 of the distributor element 3 in such a way that during one revolution of the distributor element 3, in each case a fluidic connection of the interior of the distributor element 3 with one of the exhaust outlet openings 28 via the associated outlet window 5, corresponding to the ignition timing of the associated cylinders will be produced.
- the outlet window 5 are arranged distributed in accordance with the Zündversatzes of the internal combustion engine over the circumference of the distributor element.
- the inlet windows 4 are arranged to the outlet windows 5 on the distributor element 3 such that an axially approximately opposite outlet window 5 exists for each inlet window, so that the fluidic connection between the exhaust inlet opening 1 and the interior of the distributor element 3 is approximately synchronous with the fluidic connection between the interior the distributor element 3 and one of the exhaust gas outlet openings 28 takes place.
- the annular gap 31 is closed, so that only one fluid connection between the interior of the distributor element 3 and the exhaust gas inlet opening 1 is made via the inlet window 4 during one revolution of the distributor element 3.
- the inlet windows 4 should each be arranged at the periphery slightly offset from their corresponding outlet windows 5, so that the exhaust gas flowing into the distributor element 3 via the inlet window 4 reaches the latter exactly at the opening of the outlet window 5.
- this offset should be made to the inlet windows 4, so that the uniform distribution of the outlet window 5 remains, whereby the exhaust gas supply to the cylinder at each of the cylinders takes place at the same time and with the same filling.
- the cylinder head must have a total of three intake passages per cylinder, two of which correspond to the intake manifold passages and an inlet passage arranged at right angles thereto corresponds to the exhaust gas outlet passage 28 of the housing 2.
- the inlet channel corresponding to the exhaust gas outlet channel 28 leads within the cylinder head into one or both of the intake ducts corresponding to the intake pipe 29, so that the exhaust air mixture is supplied to the respective cylinder.
- the exhaust gas is metered directly into the respective inlet channel of the cylinder head.
- Such an exhaust gas recirculation device thus enables cycle-accurate and cylinder-selective recirculation of the exhaust gas to the cylinders. Due to the short realized path lengths and the corresponding arrangement of the inlet and outlet windows, the feedback is highly dynamic and optimizable at the time of combustion. This can cause emissions of
- the scope of protection is not limited to the embodiment described.
- a separate drive for the distributor element in the form of an electric motor rotating with camshaft speed can be provided. This can then also be used with appropriate control, without having to use additional components for phase shifting.
- the distributor element can be integrated directly into the intake manifold or the cylinder head.
- the supply of the exhaust gas to the housing can also take place from an axial end of the tubular distributor element, in which case the offset of the inlet and outlet windows is to be adapted to one another according to the path lengths.
- the housing may have two exhaust gas inlet openings each corresponding to the inlet windows distributed on a fixed circumference.
- the corresponding outlet windows can then be arranged at the same distance to both sides of the inlet window distributed on a fixed circumference.
- a partition should then be arranged in the middle of the distributor element between the corresponding groups of inlet windows and outlet windows, whereby advantageous effects with regard to the uniform distribution of the exhaust gas quantity to all four cylinders are to be expected.
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)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008024571A DE102008024571B4 (de) | 2008-05-21 | 2008-05-21 | Abgasrückführvorrichtung für eine Verbrennungskraftmaschine |
| PCT/EP2009/055134 WO2009141212A1 (de) | 2008-05-21 | 2009-04-28 | Abgasrückführvorrichtung für eine verbrennungskraftmaschine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2288802A1 true EP2288802A1 (de) | 2011-03-02 |
Family
ID=40790700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09749702A Withdrawn EP2288802A1 (de) | 2008-05-21 | 2009-04-28 | Abgasrückführvorrichtung für eine verbrennungskraftmaschine |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2288802A1 (de) |
| DE (1) | DE102008024571B4 (de) |
| WO (1) | WO2009141212A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011018249A1 (de) * | 2011-04-19 | 2014-01-02 | Pierburg Gmbh | Abgasrückhalteanordnung für eine Verbrennungskraftmaschine sowie Verfahren zur Regelung einer Verbrennungskraftmaschine mit einer derartigen Abgasrückhalteanordnung |
| FR3014497B1 (fr) * | 2013-12-09 | 2018-03-16 | Valeo Systemes Thermiques | Dispositif de distribution de gaz d'echappement recircules, collecteur d'admission et module d'admission correspondants. |
| EP3171013B1 (de) * | 2015-11-17 | 2019-08-14 | Volvo Car Corporation | Abstimmbares ansaugsystem für abgasrückführung in einem verbrennungsmotor |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3011580A1 (de) * | 1980-03-26 | 1981-10-01 | Robert Bosch Gmbh, 7000 Stuttgart | Einrichtung zur betriebsgemischversorgung von brennkraftmaschinen |
| DE3217251A1 (de) * | 1982-05-07 | 1983-11-10 | Bayerische Motoren Werke AG, 8000 München | Ansaugsystem fuer gemischverdichtende, fremdgezuendete mehrzylinder-brennkraftmaschinen |
| JPH0615857B2 (ja) | 1984-06-29 | 1994-03-02 | マツダ株式会社 | エンジンの排気還流制御装置 |
| DE3722048A1 (de) * | 1987-07-03 | 1989-01-12 | Bosch Gmbh Robert | Brennkraftmaschine, insbesondere ottomotor |
| JPH04171259A (ja) | 1990-11-05 | 1992-06-18 | Hitachi Ltd | 排気還流量制御装置 |
| DE19631337B4 (de) * | 1996-08-02 | 2007-03-01 | Audi Ag | Vorrichtung zur Abgasrückführung an einer Brennkraftmaschine |
| AT3671U1 (de) * | 1997-01-23 | 2000-06-26 | Avl List Gmbh | Brennkraftmaschine mit innerer verbrennung |
| FR2768178B1 (fr) * | 1997-09-11 | 1999-11-19 | Daniel Drecq | Moteur a combustion interne comportant des moyens de recirculation des gaz d'echappement et de suralimentation |
| DE19842349B4 (de) * | 1998-09-16 | 2013-07-04 | Pierburg Gmbh | Abgasrückführsystem |
| DE19851922B4 (de) * | 1998-11-11 | 2013-07-11 | Pierburg Gmbh | Abgasrückführsystem |
| DE102005025904B4 (de) * | 2005-06-03 | 2014-01-09 | Pierburg Gmbh | Abgasrückführsystem und Verfahren zur Abgasrückführung |
-
2008
- 2008-05-21 DE DE102008024571A patent/DE102008024571B4/de not_active Expired - Fee Related
-
2009
- 2009-04-28 EP EP09749702A patent/EP2288802A1/de not_active Withdrawn
- 2009-04-28 WO PCT/EP2009/055134 patent/WO2009141212A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2009141212A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102008024571A1 (de) | 2009-12-10 |
| WO2009141212A1 (de) | 2009-11-26 |
| DE102008024571B4 (de) | 2010-03-04 |
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