EP2466103A2 - Module de recirculation des gaz d'échappement pour un moteur à combustion interne - Google Patents

Module de recirculation des gaz d'échappement pour un moteur à combustion interne Download PDF

Info

Publication number: EP2466103A2
Authority: EP; European Patent Office
Prior art keywords: exhaust gas; gas recirculation; channels; housing; bypass
Prior art date: 2010-12-17
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.): Granted

Application number

EP11186703A

Other languages

German (de)

English (en)

Other versions

EP2466103B1 (fr

EP2466103A3 (fr

Inventor

Hans-Ulrich Kühnel

Hans-Jürgen Hüsges

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.)

Pierburg GmbH

Original Assignee

Pierburg 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.)

2010-12-17

Filing date

2011-10-26

Publication date

2012-06-20

2011-10-26 Application filed by Pierburg GmbH filed Critical Pierburg GmbH

2012-06-20 Publication of EP2466103A2 publication Critical patent/EP2466103A2/fr

2015-12-09 Publication of EP2466103A3 publication Critical patent/EP2466103A3/fr

2017-12-06 Application granted granted Critical

2017-12-06 Publication of EP2466103B1 publication Critical patent/EP2466103B1/fr

Status Not-in-force legal-status Critical Current

2031-10-26 Anticipated expiration legal-status Critical

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Classifications

- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—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
- F02M26/22—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
- F02M26/25—Layout, e.g. schematics with coolers having bypasses
- F02M26/26—Layout, e.g. schematics with coolers having bypasses characterised by details of the bypass valve
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- 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
- F02M26/22—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
- F02M26/29—Constructional details of the coolers, e.g. pipes, plates, ribs, insulation or materials
- F02M26/32—Liquid-cooled heat exchangers

Definitions

the invention relates to an exhaust gas recirculation module for an internal combustion engine having two exhaust gas recirculation channels, two control valve bodies which control two formed in an exhaust gas recirculation fürströmungsquerroughe the exhaust gas recirculation channels, two exhaust gas cooling channels, which are in heat exchange with a coolant channel, each of the two exhaust gas recirculation channels are fluidly connected to one of the exhaust gas cooling channels , Two bypass channels through which the exhaust gas cooling channels are bypassed and two bypass valves, which are each operable via a separate actuator and can be opened or closed via the optional flow cross-section to the bypass channels or to the exhaust gas cooling channels.
Such exhaust gas recirculation modules are known and serve in a known manner to reduce pollutant emissions.
the exhaust gas is supplied to the engine again during the warm-up phase via bypass ducts.
cooler bypassing in the low load range is increasingly being made because many exhaust gas recirculation coolers of turbocharged engines are designed for a high refrigeration load point, which could result in overcooling.
cooling systems which have a plurality of coolers which can be individually bypassed via bypass lines, so that the most optimal operating point can be traveled.
cooling systems can be used.
the object of the invention is therefore to provide an exhaust gas recirculation module, which is carried out as possible space-reducing, the number of components and the assembly steps should decrease. In particular, it should be possible to pre-assemble the system. At the same time the best possible controllability should be maintained.
bypass valves are arranged in a common exhaust gas recirculation housing, in which the two separate exhaust gas recirculation channels are formed and from which the Bypass passages and the exhaust gas cooling ducts, the assembly is greatly simplified. At the same time, the number of components to be used decreases. Nevertheless, a single switching of the bypass channels is possible, so that overcooling can be prevented.
the bypass valves each have a valve body arranged on a shaft, wherein the shafts are mounted in the exhaust gas recirculation housing.
the use of flaps as a control body allows the control of large volume flows and release of large cross sections.
the storage in the exhaust gas recirculation housing reduces the component expenditure, whereby the flaps can be mounted in advance in the housing.
the actuators of the bypass valves are pneumatically actuated, whereby the control effort is reduced. Furthermore, pneumatic actuators have a long service life.
the two exhaust gas cooling channels are formed in a heat exchanger housing, on the downstream two check valves are arranged, in which open the two exhaust gas cooling channels.
a common coolant channel can be used. It eliminates additional components, which reduces weight. The recyclable exhaust gas mass flow is increased by the check valves, as a backflow due to pulsations is avoided.
bypass channels open upstream of the check valves in the exhaust gas cooling channels.
an exhaust gas recirculation flap is arranged as a control valve body in the exhaust gas recirculation housing in both exhaust gas recirculation channels, via which the flow cross sections of the exhaust gas recirculation channels are regulated, the two exhaust gas recirculation valves are arranged on a common shaft which is actuated via a common actuator.
This total actuator can be used to regulate a total amount to be returned.
the different cylinder groups remain separated over the entire running distance. Since no additional housing parts must be used, the structure remains compact with few and vorzumontierenden parts and can be mounted with little effort.
the exhaust gas recirculation housing is formed in two parts, wherein the bearing points of the shaft of the exhaust gas recirculation valves are formed in the second flange-shaped part and the bearing points of the waves of the bypass valves are formed in the first part, wherein on the upstream side of the first part, the second part of the Exhaust gas recirculation housing is attached.
the heat exchanger housing is fixed downstream of the exhaust gas recirculation housing and has a partition wall, via which the two exhaust gas channels are separated from each other.
the heat exchanger housing is fixed downstream of the exhaust gas recirculation housing and has a partition wall, via which the two exhaust gas channels are separated from each other.
the exhaust gas recirculation module 5 has a coolant channel which extends through the heat exchanger housing into the exhaust gas recirculation housing, so that the exhaust gas recirculation housing is cooled, which on the one hand increases the overall cooling efficiency and on the other hand additionally protects the actuators against overheating.
This module is particularly suitable for the return of exhaust gas in internal combustion engines with high back pressure from the air inlet side, since even with these conditions, a sufficient amount of exhaust gas can be attributed by using the pressure peaks of the exhaust gas.
the exhaust gas recirculation module according to the invention shown in the figures consists of a total of four outer housing parts, of which a first housing part is an exhaust gas recirculation housing 2, a second housing part is a heat exchanger housing 4, a third housing part is an aftercooler housing 6 and a fourth housing part is a check valve housing 8, at its end a collection tube 10 is formed.
two exhaust gas recirculation channels 12 are formed, of which in the FIG. 2 only one can be seen, and two flow cross sections 14 of the exhaust gas recirculation channels 12, which are both controlled by an exhaust gas recirculation valve 16, which consists of two control valve bodies 18 in the form of arranged on a common shaft 20 exhaust gas recirculation flaps 22 and an electric actuator 24.
a common partition wall 23 which extends from the inlet 26 of the exhaust gas recirculation housing 2 to the outlet 28, is arranged offset by 90 ° to the inlet 26, so that an exhaust gas flow in the interior of the housing 2 is deflected by 90 °
the inlet 26 is designed as a flange, via which the module can be flanged directly to an engine block or an exhaust manifold, not shown, wherein two exhaust gas flows of two cylinder groups are executed separately in the engine block or exhaust manifold, so that an exhaust gas flow to the first exhaust gas recirculation channel 12 and the second exhaust gas flow is connected to the second exhaust gas passage.
the shaft 20 is surrounded outside the housing 2 by a return spring 32, via which in case of failure of the actuator 24, the exhaust gas recirculation valves 22 in their the flow cross sections 14 are turned closing position.
a coolant channel 34 is additionally formed, via which the thermally highly stressed housing 2 is cooled and in particular the actuator 24 is protected against thermal overload.
coolant tubes 36 which allow the coolant from the Side of the outlet 28 to the exhaust gas recirculation valves 22 and can be performed around them, so that a good thermal decoupling is achieved, which is further reinforced in that the exhaust gas recirculation housing 2 is made in two parts, wherein the first part 38, in which the bearings 39 are arranged for the shaft 20 of the exhaust gas recirculation valve 16 and the regulated flow cross sections 14, is formed substantially as an extended flange which is flanged to the second part 40, to which the actuator 24 and the coolant tubes 36 are mounted.
the first part 38 has a coolant channel 34 extending on both sides of the shaft 20, which extends via bores into the exhaust gas recirculation housing 2 and the coolant tubes 36 and the coolant jacket.
the first part 38 and the second part 40 of the exhaust gas recirculation housing 2 are fastened to one another via flanges with the interposition of a seal.
bypass valves 42, 43 are arranged in the exhaust gas recirculation housing 2, each consisting of a valve body 44, 45 which is mounted on a shaft 46, 47 mounted in the exhaust gas recirculation housing 2, which via a lever 48, 49 by means of a respective pneumatic actuator 50, 51 is actuated, which in turn is attached to the exhaust gas recirculation valve housing 2, as shown FIG. 3 is apparent.
the flap body 44, 45 act depending on their position with one of two valve seats 52, 54 which either a flow cross-section to one of two formed within the heat exchanger housing 4 exhaust gas cooling channels 56 or to one of two bypass channels 58, 60, which as tubes on Heat exchanger housing 4 are passed.
the exhaust gas recirculation housing 2 is fastened via a flange connection 62 on the heat exchanger housing 4, for example, with the interposition of a seal, not shown.
a partition wall exhaust gas cooling channels 56 are arranged, whose outer walls serve as a separation to the coolant jacket 34 which is formed between the exhaust gas cooling channels 56 and the heat exchanger housing 4.
the partition wall forms an extension to the partition wall between the exhaust gas recirculation channels 12 in the exhaust gas recirculation housing 2.
the fluid connection between the coolant channels 34 of the exhaust gas recirculation valve housing 2 and the coolant jacket in the heat exchanger housing 4 is also produced via the flange connection.
the aftercooler housing 6 is attached to the exhaust gas recirculation housing 2 opposite side of the heat exchanger housing 4, which in turn is connected via a flange to the check valve housing 8, in the interior of which two exhaust gas check valves are arranged, to which the separation of the two exhaust gas cooling channels 56 is continued so that each exhaust gas cooling channel 56 discharges into an exhaust gas check valve which is not visible in the figures but is generally known.
the check valve housing 8 opens into a manifold 10, in which the two exhaust gas streams are first mixed and in which an exhaust gas mass flow sensor 64 is arranged.
the two bypass channels 58, 60 open in the present embodiment in the manifold 10, wherein to maintain the high exhaust gas recirculation rates by suppressing the return flow by means of the check valves, an introduction in the aftercooler would be advantageous.
the two exhaust gas streams are first precooled in the exhaust gas recirculation housing 2 and the exhaust gas quantity is adjusted via the opening width of the flow cross sections 14 by means of the exhaust gas recirculation flaps 22 in accordance with a control command on the actuator 24.
the on-flowing exhaust gas is still separated and cooled down either via the exhaust gas cooling channels 56 or it passes uncooled but also separated from each other via the bypass channels 58, 60 in the manifold. From the exhaust gas cooling channels 56, the exhaust gas reaches the check valves.
This exhaust gas is cooled, partially cooled or uncooled the distributor rail and thus the internal combustion engine again made available, which again serves to pollutant reduction, since the best possible exhaust gas temperature can be adjusted with the one hand, a sufficient engine temperature to ensure good oil lubrication and on the other hand relatively low Combustion temperatures can be generated.
the module can be installed as a unit pre-assembled on the internal combustion engine. Despite the various integrated functions, it only requires a very small installation space with different control functions.

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

EP11186703.2A 2010-12-17 2011-10-26 Module de recirculation des gaz d'échappement pour un moteur à combustion interne Not-in-force EP2466103B1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE102010055027A DE102010055027A1 (de)	2010-12-17	2010-12-17	Abgasrückführmodul für eine Verbrennungskraftmaschine

Publications (3)

Publication Number	Publication Date
EP2466103A2 true EP2466103A2 (fr)	2012-06-20
EP2466103A3 EP2466103A3 (fr)	2015-12-09
EP2466103B1 EP2466103B1 (fr)	2017-12-06

Family

ID=44903112

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP11186703.2A Not-in-force EP2466103B1 (fr)	2010-12-17	2011-10-26	Module de recirculation des gaz d'échappement pour un moteur à combustion interne

Country Status (2)

Country	Link
EP (1)	EP2466103B1 (fr)
DE (1)	DE102010055027A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE102016200326A1 (de)	2016-01-14	2017-07-20	Bayerische Motoren Werke Aktiengesellschaft	Abgas-Rückführ-Kühler
DE102016200371A1 (de)	2016-01-14	2017-07-20	Bayerische Motoren Werke Aktiengesellschaft	Abgas-Rückführ-Kühler

Citations (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE102008035747A1 (de)	2007-10-18	2009-04-23	Ford Global Technologies, LLC, Dearborn	AGR-Kühlung mit mehreren Kühlern

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE19734801A1 (de) *	1997-08-12	1999-02-18	Pierburg Ag	Abgasrückführsystem für eine Brennkraftmaschine mit einem Turbolader
BR0300426A (pt) *	2003-02-27	2004-11-03	Wahler Metalurgica Ltda	Conjunto válvula defletora de gás
FR2890698B1 (fr) *	2005-09-12	2010-12-10	Valeo Systemes Thermiques	Module d'echange de chaleur pour la regulation en temperature d'un melange de gaz admis dans un moteur thermique de vehicule automobile
CN101415933B (zh) *	2006-03-22	2012-06-20	博格华纳公司	一体式的充气和排气再循环阀
DE102008033823B4 (de) *	2008-07-19	2013-03-07	Pierburg Gmbh	Abgasrückführvorrichtung für eine Verbrennungskraftmaschine

2010
- 2010-12-17 DE DE102010055027A patent/DE102010055027A1/de not_active Ceased
2011
- 2011-10-26 EP EP11186703.2A patent/EP2466103B1/fr not_active Not-in-force

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE102008035747A1 (de)	2007-10-18	2009-04-23	Ford Global Technologies, LLC, Dearborn	AGR-Kühlung mit mehreren Kühlern

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE102016200326A1 (de)	2016-01-14	2017-07-20	Bayerische Motoren Werke Aktiengesellschaft	Abgas-Rückführ-Kühler
DE102016200371A1 (de)	2016-01-14	2017-07-20	Bayerische Motoren Werke Aktiengesellschaft	Abgas-Rückführ-Kühler
DE102016200371B4 (de)	2016-01-14	2018-12-13	Bayerische Motoren Werke Aktiengesellschaft	Bypassklappe für einen Abgas-Rückführ-Kühler

Also Published As

Publication number	Publication date
DE102010055027A1 (de)	2012-06-21
EP2466103B1 (fr)	2017-12-06
EP2466103A3 (fr)	2015-12-09

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