EP2602467A1 - Vorrichtung für die Luftzirkulation in einem Motor - Google Patents

Vorrichtung für die Luftzirkulation in einem Motor Download PDF

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Publication number
EP2602467A1
EP2602467A1 EP12194059.7A EP12194059A EP2602467A1 EP 2602467 A1 EP2602467 A1 EP 2602467A1 EP 12194059 A EP12194059 A EP 12194059A EP 2602467 A1 EP2602467 A1 EP 2602467A1
Authority
EP
European Patent Office
Prior art keywords
switching means
air
line
recirculation
inlet
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Withdrawn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
EP12194059.7A
Other languages
English (en)
French (fr)
Inventor
Corentin Leborgne
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.)
PSA Automobiles SA
Original Assignee
Peugeot Citroen Automobiles SA
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 Peugeot Citroen Automobiles SA filed Critical Peugeot Citroen Automobiles SA
Publication of EP2602467A1 publication Critical patent/EP2602467A1/de
Withdrawn legal-status Critical Current

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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
    • F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
    • F02M26/16—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system with EGR valves located at or near the connection to the 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
    • F02M26/21—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
    • F02M26/71—Multi-way valves

Definitions

  • the invention relates to a method for recirculating air for a thermal engine of a vehicle, in particular an automobile, and in particular a hybrid or semi-hybrid vehicle.
  • the vehicle is driven by an electric machine via the powertrain engine.
  • the electric machine is also called reversible alternator.
  • This reversible alternator thus drives the heat engine which, itself, drives a gearbox to which the front axle of the vehicle is mechanically linked.
  • the heat engine is then extinguished and, as a result, admits then rejects clean air without combustion.
  • An object of the invention is to provide a method which, through an air recirculation device for a suitable heat engine, reduces the noise pollution due to this air circulation, while limiting at best the load losses inherent to this circulation, when the engine is in zero emission mode.
  • an air recirculation process that can involve an air recirculation device for a heat engine having an intake line and an exhaust line which comprises in in addition to a first switching means disposed on the intake line and a second switching means disposed on the exhaust line, the first and second switching means being in direct fluid communication with each other.
  • the presence of switching means in the exhaust and intake lines selectively allows recirculation of air between the exhaust line and the intake line while neutralizing part of the exhaust line. downstream of the switching means present in this exhaust line and a portion of the inlet line upstream of the switching means present in this intake line.
  • the pressure losses due to the air circulation, engine in zero emission mode are reduced as well as the noise pollution due to the air noises in the neutralized pipes of the exhaust line and the intake line.
  • Such a device can be used in a heat engine for a motor vehicle, or in a powertrain for a motor vehicle.
  • such a powertrain further comprises an electric machine comprising a reversible alternator.
  • the first switching means does not completely obstruct the intake of air from the inlet.
  • the second switching means is in a position such that no flow passes downstream in the exhaust line and the first switching means progressively closes the air supply coming from the intake line.
  • the electric machine comprises a reversible alternator.
  • the first switching means is a three-way valve
  • the second switching means is a three-way valve
  • the first switching means is disposed at an input of an intake manifold of the intake line.
  • the second switching means is disposed at the outlet of an exhaust manifold of the exhaust line.
  • the invention also relates to the application of such a method to a motor vehicle hybrid type thermal / electrical.
  • the invention relates to a motor vehicle of the hybrid thermal / electrical type, comprising electronic means arranged for the implementation of a method according to the invention.
  • the heat engine 1 is here shown schematically in the form of a combustion chamber 10 associated with a piston (not shown) of the heat engine 1.
  • the combustion chamber 10 comprises an intake valve 11 and an exhaust valve 12 allowing , respectively, the admission and the escape of air within the combustion chamber 10.
  • a heat engine comprises several pistons each of which is associated with a combustion chamber, as well as one or more intake valves and one or more exhaust valves.
  • the valve 11 is located at one end of an inlet line 15 which comprises, successively, a throttle valve 16 or a metering device for dosing a quantity of air admitted through the intake line 15 followed by a tubing of connection 17 to a first switching means 100.
  • the connecting pipe 17 is connected to a first input of the first switching means 100.
  • an inlet distributor 13 At an output of the first switching means 100 is connected an inlet distributor 13 for bringing the air flowing in the intake line 15 to all the intake valves of the engine 1, including the intake valve 11.
  • the exhaust valve 12 is located at one end of an exhaust line 18 of the heat engine 1.
  • the outlet of the exhaust valve 12 is connected to an exhaust manifold 14, at the exit of which is positioned a second switching means 200, a first output is connected to the rest of the exhaust line 18.
  • the exhaust line 18 comprises, downstream of the second switching means 200, a turbine of a turbocharger as well as possibly a particle filter, in the context of a diesel engine for example.
  • the first switching means 100 is in direct fluid communication with the second switching means 200 by means of a recirculation pipe 300, connecting a second output of the second switching means 200 to a second input of the first switching means 100
  • the recirculation pipe 300 as well as the two switching means 100 and 200 form an air recirculation device for a heat engine according to the invention.
  • the first switching means 100 is, here, a three-way valve of which a valve will be able to selectively shut off either the first inlet allowing an air inlet of the exhaust line 15 through the connecting pipe 17, or the second inlet allowing a supply of air through the recirculation line 300.
  • the second switching means 200 is, here, a three-way valve including a valve will allow to selectively close the second output connected to the inlet of the pipe recirculation air 300 or the first output of the valve connected to the rest of the exhaust line 18. The two valves of the first 100 and second 200 switching means are operated simultaneously, as we will see above. after.
  • this figure schematically shows the positioning of the air recirculation device according to the invention when the heat engine 1 operates. It is understood by operation of the heat engine 1, the fact that the latter fulfills its office of engine in which there is fuel injection and combustion of the latter in the combustion chamber 10. In this situation, the first switching means 100 is in a position in which it allows the passage of air directly from the inlet line 15 to the inlet of the inlet distributor 13, while it prevents any flow of fluid or gas from the pipe of recirculation 300. Such circulation is illustrated by the arrows drawn within the various elements of the admission line to the figure 1 .
  • the second switching means 200 is in a position in which it directs the flow of exhaust gas from the outlet of the exhaust manifold 14 to the rest of the exhaust line 18 located downstream of the second switching means. 200 and connected to the first output of the second switching means 200.
  • the switching means 200 obstructs its second output connected to the inlet of the recirculation pipe 300 to prevent any passage of exhaust gas to through the air recirculation pipe 300 to the first switching means.
  • the first switching means 100 obstructs its first inlet allowing an air inlet from the inlet line 15 while opening the second inlet connected to the outlet of the recirculation pipe 300.
  • the second switching means 200 is in a position where it obstructs its first output connected to the remainder of the exhaust line 18 downstream, while opening its second output connected to the inlet of the recirculation pipe 300.
  • the air flows from the exhaust valve 12 through the exhaust manifold 14. Then, this air flow is redirected by the second switching means 200 into the pipe recirculation 300 which reinjects this air flow in the intake manifold 13 by means of the first switching means 100. Next, the air flow is reinjected into the combustion chamber one through the intake valve 11.
  • the section of the recirculation pipe 300 is optimized by choosing a value of a hydraulic diameter of said recirculation pipe 300 of the same order of magnitude as a value of a hydraulic diameter of the connecting pipe 17 and a value of a hydraulic diameter of a duct of the rest of the exhaust line 18 downstream of the second switch 200.
  • the first switching means 100 in the situation where the heat engine is driven by the electric machine, does not completely obstruct its first inlet connected to the connection pipe 17, as illustrated in FIG. figure 2 . This allows a leakage flow that can compensate for the energy losses of compressed air and / or leaks in the air. cylinders of the engine 1. This compensation is illustrated in the figure 2 by the fine line arrow located in the intake line 15.
  • the second switching means 200 operates in all or nothing mode. Indeed, when the heat engine is driven by the electric machine comprising a reversible alternator, all the air expelled by the exhaust valve 12 is sent through the intake valve 11. There is no, in mode zero emission, injection / combustion of fuel within the combustion chamber 10 and the heat engine 1 operates in all-electric mode driven by a reversible alternator included in the electric machine. In return, when the vehicle is driven by the heat engine 1, there is no passage of exhaust gas in the recirculation pipe 300. The heat engine 1 operates normally, there is then injection and combustion of fuel at within the combustion chamber 10.
  • the electric machine comprising the reversible alternator, is driving and rotates the heat engine 1 which is then extinguished.
  • the second switching means 200 is in position no flow passes downstream in the exhaust line 18 and the first switching means 100 progressively closes the inlet of air coming from the intake line through the throttle valve 16 and the connection pipe 17. This closing is progressive the time required for sufficient air to be admitted so that the heat engine 1 does not pump through the segmentation of the various pistons the air that would be lacking to the proper functioning of the recirculation device, if the first way switching in this position in a non-progressive manner.
  • the vehicle is driven by the electric machine through the engine thermal 1 off, that is to say in zero emission mode.
  • the electric machine with the reversible alternator is driving and runs the engine which is off.
  • the second switching means 200 is in a position such that no flow rate of air passes through the remainder of the downstream exhaust line 18, while the first switching means 100 substantially prevents the inflow of air from the intake line 15 through the throttle valve 16 and the connecting pipe 17, while remaining slightly open to allow a possible air leakage flow as previously described.
  • the second switching means 200 passes from the position where the air was directed into the air recirculation duct 300 illustrated in FIG. figure 2 at a position where the air passes in the part of the exhaust line 18 located downstream of the second switching means 200, the air inlet in the recirculation duct 300 then being closed.
  • the first switching means 100 moves from the position where it largely closed the air intake, as illustrated in FIG.
  • FIG. figure 2 at which the first switching means 100 completely free the passage of air from the portion of the inlet line 15 upstream of the first switching means 100 and the inlet of the inlet distributor 13, the first switching means 100 then closing the arrival of the recirculation line 300.
  • the first 100 and second 200 switching means are in this position, illustrated in FIG. figure 1 , fuel injection and combustion of this fuel within the combustion chamber 100 starts.
  • the vehicle is driven in a conventional manner by the heat engine 1.
  • the electric machine comprising the reversible alternator is then driven by the heat engine 1 and becomes a generator of electric current.
  • the second switching means 200 completely closes the inlet of the recirculation pipe 300 and the first switching means 100 completely closes the inlet of the recirculation pipe 300.
  • the air recirculation device for a heat engine according to the invention which has just been described makes it possible to operate the heat engine 1 in closed circuit when the latter is off. This makes it possible to avoid pumping the air throughout the intake line 15 while avoiding rejecting the expelled air throughout the exhaust line 18.
  • Such an air recirculation device according to the invention also limits the pulsed air noise when the vehicle operates in zero emission mode.
  • the air recirculation device according to the invention makes it possible to achieve a so-called hybrid motorization by a reversible alternator having a level of energy and acoustic performance higher than a so-called hybrid engine arrangement consisting of just driving the engine and the chain of traction by admitting and rejecting the air in an open loop through the entire intake line 15 and the entire exhaust line 18.
  • the air recirculation device according to the invention allows these performance gains without having to disable the operation of the intake valves 11 and exhaust 12 of the heat engine 1, such a deactivation being complicated and expensive to achieve.

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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)
  • Output Control And Ontrol Of Special Type Engine (AREA)
EP12194059.7A 2011-12-05 2012-11-23 Vorrichtung für die Luftzirkulation in einem Motor Withdrawn EP2602467A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1161132A FR2983526B1 (fr) 2011-12-05 2011-12-05 Dispositif de recirculation d'air dans un moteur thermique

Publications (1)

Publication Number Publication Date
EP2602467A1 true EP2602467A1 (de) 2013-06-12

Family

ID=47191655

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12194059.7A Withdrawn EP2602467A1 (de) 2011-12-05 2012-11-23 Vorrichtung für die Luftzirkulation in einem Motor

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EP (1) EP2602467A1 (de)
FR (1) FR2983526B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10934945B2 (en) * 2016-08-24 2021-03-02 Ford Global Technologies, Llc Internal combustion engine with compressor, exhaust-gas recirculation arrangement and pivotable flap

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0849453A2 (de) 1990-11-06 1998-06-24 Mazda Motor Corporation Abgasrückführungssystem für eine Brennkraftmaschine
EP1081368A1 (de) * 1999-09-03 2001-03-07 Ford Global Technologies, Inc., A subsidiary of Ford Motor Company Abgasrückführungssystem und Verfahren zu seiner Steuerung
US20020185116A1 (en) * 2001-06-08 2002-12-12 Siemens Vdo Automotive Inc. Exhaust gas recirculation system
DE102004044894A1 (de) * 2004-09-14 2006-03-30 Volkswagen Ag Mischeinrichtung und Abgasrückführeinrichtung mit einer Mischeinrichtung
FR2916255A1 (fr) * 2007-05-18 2008-11-21 Faurecia Sys Echappement Vanne trois voies pour ligne d'echappement de vehicule automobile
WO2011048540A1 (en) * 2009-10-19 2011-04-28 Dell'orto S.P.A. Valve for egr low-pressure applications in internal combustion engines
WO2011130015A2 (en) * 2010-04-14 2011-10-20 Borgwarner Inc. Multifunction valve

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0849453A2 (de) 1990-11-06 1998-06-24 Mazda Motor Corporation Abgasrückführungssystem für eine Brennkraftmaschine
EP1081368A1 (de) * 1999-09-03 2001-03-07 Ford Global Technologies, Inc., A subsidiary of Ford Motor Company Abgasrückführungssystem und Verfahren zu seiner Steuerung
US20020185116A1 (en) * 2001-06-08 2002-12-12 Siemens Vdo Automotive Inc. Exhaust gas recirculation system
DE102004044894A1 (de) * 2004-09-14 2006-03-30 Volkswagen Ag Mischeinrichtung und Abgasrückführeinrichtung mit einer Mischeinrichtung
FR2916255A1 (fr) * 2007-05-18 2008-11-21 Faurecia Sys Echappement Vanne trois voies pour ligne d'echappement de vehicule automobile
WO2011048540A1 (en) * 2009-10-19 2011-04-28 Dell'orto S.P.A. Valve for egr low-pressure applications in internal combustion engines
WO2011130015A2 (en) * 2010-04-14 2011-10-20 Borgwarner Inc. Multifunction valve

Also Published As

Publication number Publication date
FR2983526B1 (fr) 2015-03-13
FR2983526A1 (fr) 2013-06-07

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