EP1715162A2 - Système d'évacuation des gaz d'échappement d'un moteur à combustion interne et clapet d'obturation pour un système d'évacuation des gaz d'échappement - Google Patents

Système d'évacuation des gaz d'échappement d'un moteur à combustion interne et clapet d'obturation pour un système d'évacuation des gaz d'échappement Download PDF

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Publication number
EP1715162A2
EP1715162A2 EP06003308A EP06003308A EP1715162A2 EP 1715162 A2 EP1715162 A2 EP 1715162A2 EP 06003308 A EP06003308 A EP 06003308A EP 06003308 A EP06003308 A EP 06003308A EP 1715162 A2 EP1715162 A2 EP 1715162A2
Authority
EP
European Patent Office
Prior art keywords
exhaust
exhaust gas
line
discharge system
pressure line
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.)
Granted
Application number
EP06003308A
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German (de)
English (en)
Other versions
EP1715162B1 (fr
EP1715162A3 (fr
Inventor
Dietmar Schwarzenthal
Erwin Rutschmann
Thorsten Wieg
Leo Spiegel
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche AG
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Publication date
Application filed by Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of EP1715162A2 publication Critical patent/EP1715162A2/fr
Publication of EP1715162A3 publication Critical patent/EP1715162A3/fr
Application granted granted Critical
Publication of EP1715162B1 publication Critical patent/EP1715162B1/fr
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Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2053—By-passing catalytic reactors, e.g. to prevent overheating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/04—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits concerning exhaust conduits
    • F02D9/06—Exhaust brakes
    • 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
    • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
    • F02B37/12—Control of the pumps
    • F02B37/18—Control of the pumps by bypassing exhaust from the inlet to the outlet of turbine or to the atmosphere

Definitions

  • the invention relates to an exhaust gas removal system and a butterfly valve for an exhaust gas removal system of an internal combustion engine according to the features of the preambles of claims 1 and 11.
  • a multi-flow exhaust system in which the exhaust gas mass flow is controllable by a arranged in one of the two exhaust pipe strands flap element.
  • the object of the invention is to ensure with a manageable overhead that caused by leaks of the check valves exhaust leakage flows through the closed exhaust pipe harness to the outside.
  • a pressure line which is connected to a vacuum source, is connected downstream of a shut-off valve in the closable exhaust-gas line branch.
  • exhaust gas leakage flow is preferably fed back to the engine via the intake system.
  • a throttle provided in the pressure line ensures that air is not sucked in via the part of the exhaust-gas line branch which continues downstream of the shut-off valve.
  • the flow resistance of the throttle is adjusted so that it ensures a return of the exhaust gases even at a maximum leakage current.
  • two check valves are arranged in the shut-off exhaust pipe line, wherein the pressure line between the two check valves opens into the exhaust pipe line.
  • the second shut-off valve ensures that over the part of the exhaust pipe string downstream of the pressure line no secondary air is sucked from the outside.
  • the pressure line is connected to an air pump.
  • the injected between the two check valves compressed air also prevents that caused by the first check valve exhaust leakage flow exits the exhaust system via this exhaust line to the outside.
  • a fourth embodiment only one check valve is provided in the exhaust pipe line to be shut off; the upstream of the check valve in the exhaust pipe branch opening pressure line is in turn connected to an air pump.
  • the compressed air blown into the exhaust-gas line branch prevents an exhaust-gas leakage flow from reaching the outside via the shut-off exhaust-gas line branch.
  • a fifth and sixth embodiment see FIGS. 5 to 8
  • the two check valves used in the second and third embodiments are replaced by a check valve in which a flow guide for a gaseous medium is integrated for sealing against the exhaust pipe line.
  • the check valve is preferably designed as a butterfly valve, which has on its end face at least one annular groove which serves as a flow guide for the gaseous medium.
  • a pressure line is connected, which is connected to the annular groove, so that either analogously to the second embodiment (see FIG. 2), the exhaust gas leakage current is sucked through the connection of the pressure line to the intake system or analogously to the third embodiment (see FIG. 3), the annular groove is acted upon via a connected to the pressure line air pump with compressed air.
  • an air intake system hereinafter referred to as suction system 4, connected to an engine unit 2, an air intake system, hereinafter referred to as suction system 4, connected.
  • the intake system 4 is connected upstream of a throttle body 6 with a throttle valve 8, through which the engine supplied air mass flow is controllable.
  • an exhaust gas removal system is connected to the engine unit 2, which has a manifold unit 8 and two exhaust pipe strands 10 and 12 adjoining the manifold unit 8.
  • a check valve in the form of a butterfly valve 14 is integrated in the first exhaust pipe line 10 downstream of the manifold unit 8.
  • the second exhaust-gas line section 12 which runs parallel to the first exhaust-gas line section 10, has a catalyst, referred to below as start-up catalyst 16. Both exhaust pipe strands 10, 12 are merged at a point 18; downstream of the point 18, a second catalyst, hereinafter referred to as the main catalyst 20, connects.
  • a pressure line 22 Downstream of the arranged in the first exhaust pipe 10 butterfly valve 14, a pressure line 22 is connected, which is connected at its other end to the suction system 4 and thus to a vacuum source.
  • a throttle 24 In the pressure line 22, a throttle 24 is still provided, whose operation will be explained.
  • the exhaust gas removal system operates in the following manner: During the start phase, in which the engine unit and arranged in the exhaust gas discharge system catalysts 16 and 20 have not yet reached their operating temperature, the shut-off valve 14 is closed by a motor control unit, so that the entire exhaust gas mass flow exclusively through the second exhaust pipe branch 12 is guided. Thus, the smaller in size trained starting catalyst 16 can quickly reach its operating temperature, so that low emissions can be achieved even in the startup phase of the internal combustion engine.
  • the intake system 4 pressure line 22 in which a corresponding negative pressure is formed, an exhaust gas leakage current, the latter due to the not hundred percent tightness of the butterfly valve 14 latter, again supplied via the pressure line 22 of the motor unit 2 and the suction system 4 become.
  • the throttle 24 arranged in the pressure line 22 ensures that the negative pressure values are limited, so that no secondary air from outside, i. is sucked in via the open end of the exhaust-gas removal system.
  • the second exemplary embodiment differs in that a second shut-off flap 26 is arranged in the first exhaust-gas line branch 10 downstream of the first shut-off flap 14.
  • the pressure line 22 opens between the two butterfly valves 14, 26 in the first exhaust pipe line 10 a.
  • the first exhaust pipe line 10 is closed by the two shut-off valves 14, 26, so that the entire exhaust gas mass flow is again guided exclusively via the second exhaust pipe line 12.
  • Exhaust gas leakage flow, which has passed the first shut-off valve 14 can in turn be supplied via the pressure line 22 of the motor unit 2 analogously to the first exemplary embodiment.
  • the second shut-off flap 26 ensures that no secondary air is sucked in via the pressure line 22 from the outside via the end of the exhaust-gas removal system.
  • the third embodiment differs from the second embodiment in that an air pump 28 is connected to the pressure line 22.
  • the input side of the air pump 28 connected part of the pressure line 22 is connected upstream of the throttle body 6.
  • compressed air is blown via the pressure line 22 in the lying between the two butterfly valves 14, 26 part of the first exhaust pipe string 10 during start-up operation of the engine - in turn, both shut-off valves 14, 26 are closed. In this case too, it is prevented that an exhaust gas leakage flow via the blocked first exhaust gas line branch 10 leaves the exhaust gas removal system.
  • shut-off flap 14 is provided in the first exhaust-gas line run 10, with the pressure line 22 leading into the first exhaust-gas line run 10 upstream of the shut-off flap 14.
  • compressed air is blown into the first exhaust gas line 10 via the air pump 28. If the shut-off valve 14 is closed during start-up operation, it is also prevented that a part of the exhaust gas mass flow over the first exhaust pipe 10 passes to the outside. The airflow generated by the air pump 28 in this case must be greater than the exhaust gas leakage flow. Furthermore, it must be ensured that in the exemplary embodiments according to FIGS. 3 and 4 the overpressure is designed such that it is higher than the maximum achievable pressure in the exhaust-gas removal system.
  • the butterfly valve 14 ' has a housing 30 in which a disc-shaped valve body 32 is rotatably mounted on a shaft 34 between a closed and open position. As can be seen from FIG. 7, an annular groove 36 is made on the end face of the flap body 32. On the housing 30 of the butterfly valve 14 ', a line connection 38 is provided for the pressure line 22.
  • the pressure line 22 is connected analogously to the second embodiment of the intake system 4 of the internal combustion engine. During operation of the internal combustion engine and when the shut-off flap 14 'is in the closed position, the exhaust gas leakage flow is sucked off via the annular groove 36 and returned to the engine unit 2.
  • the only difference to the fifth embodiment is that the pressure line is connected to an air pump 28 analogous to the third embodiment.
  • the structural design of the butterfly valve 14 ' is unchanged. During operation of the internal combustion engine and when the shut-off flap 14 'is in the closed position, compressed air is blown into the annular groove 36 and thus an exhaust gas leakage current into the downstream part of the exhaust-gas line 10 is prevented.
  • FIG. 9 different designs for shape and geometry of the annular groove 36 are conceivable.
  • the Outside flanks 32a, 32b of the flap body 32 which laterally delimit the annular groove 36, have different diameters.
  • the smaller diameter is directed opposite to the exhaust gas stream;
  • a pressure pad can be constructed before the butterfly valve 14 ', so that the sealing function is further improved.
  • the sealing function can also be increased by inserting two or more annular grooves 36, 37 (see FIG. 10) into the valve body 32.
  • the annular grooves can also be designed as a type of thread or helix 39 (see FIG. 11).
  • FIGS. 12 and 13 show in greater detail the connection of the underpressure or overpressure connection (line connection 38) to the shut-off flap 14 'according to the fifth and sixth embodiments.
  • FIG. 12 shows the shut-off flap 14 'in the open position and FIG. 13 in the closed position.
  • the pressure supply bores 40 integrated in the shaft 34 for the annular groove 36 are separated from the two line ports 38, so that no exhaust gas can be pushed back via the annular groove 36; an elaborate seal is eliminated.
  • a puncture 42 is provided at the two shaft ends, which are connected to the pressure supply bores 40, so that the bearing 44 for the shaft 34 is also sealed.
  • the line connections 38 are aligned or correspond with the pressure supply bores 40, so that the annular groove 36 can be subjected to negative or positive pressure for sealing the shut-off flap 14'.
  • Fig. 14 the housing 30 of the butterfly valve 14 'is shown, wherein on the inside of the housing 30, two stops 46 are provided for the butterfly valve 14'. In this way, larger tolerances with regard to the dimensioning of shut-off flap 14 'and housing 30 can be permitted without sacrificing the sealing function.
  • shut-off flap 14 ' shown in FIGS. 7 to 13 in an exhaust gas discharge system as shown in FIGS. 2 and 3. That is, one would shut the valve 14 and 26 by one Shut off valve 14 '- as shown in FIGS. 7 to 13 and described - replace.
  • a modified pressure line 22 which then has a diversion to both shut-off valves 14 ', a corresponding pressurization of the two butterfly valves 14' would be possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Silencers (AREA)
  • Supercharger (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Exhaust Gas After Treatment (AREA)
EP06003308A 2005-04-19 2006-02-17 Système d'évacuation des gaz d'échappement d'un moteur à combustion interne et clapet d'obturation pour un système d'évacuation des gaz d'échappement Active EP1715162B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005017863A DE102005017863A1 (de) 2005-04-19 2005-04-19 Abgasabführungssystem für eine Brennkraftmaschine sowie Absperrklappe für ein Abgasabführungssystem

Publications (3)

Publication Number Publication Date
EP1715162A2 true EP1715162A2 (fr) 2006-10-25
EP1715162A3 EP1715162A3 (fr) 2007-10-10
EP1715162B1 EP1715162B1 (fr) 2011-12-21

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EP06003308A Active EP1715162B1 (fr) 2005-04-19 2006-02-17 Système d'évacuation des gaz d'échappement d'un moteur à combustion interne et clapet d'obturation pour un système d'évacuation des gaz d'échappement

Country Status (3)

Country Link
EP (1) EP1715162B1 (fr)
AT (1) ATE538295T1 (fr)
DE (1) DE102005017863A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008025406A1 (fr) * 2006-08-31 2008-03-06 Bayerische Motoren Werke Aktiengesellschaft Ligne d'échappement pour un moteur à combustion interne
DE102007049171A1 (de) * 2007-10-13 2009-04-16 Bayerische Motoren Werke Aktiengesellschaft Abgasstrang für eine Brennkraftmaschine mit diagnosefähigem Absperrventil sowie diagnosefähiges Absperrventil
DE102008009089A1 (de) 2008-02-14 2009-08-20 Bayerische Motoren Werke Aktiengesellschaft Verfahren und Vorrichtung zum Bestimmen eines Leckagemassenstroms aus einer Absperreinrichtung einer eine Abgasreinigungseinrichtung umgehenden Leitung

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007013500A1 (de) * 2007-03-21 2008-09-25 Bayerische Motoren Werke Aktiengesellschaft Abgasstrang für einen Verbrennungsmotor
DE102009037285A1 (de) 2009-08-12 2011-02-17 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Abgasanlage einer Brennkraftmaschine
DE102016113380A1 (de) * 2016-07-20 2018-01-25 Man Diesel & Turbo Se Verfahren zum Betreiben einer Brennkraftmaschine und Brennkraftmaschine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19645226A1 (de) 1996-11-02 1998-05-07 Bayerische Motoren Werke Ag Mehrflutige, zur Abgasnachbehandlung ausgebildete Abgasanlage für Brennkraftmaschinen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3116725A (en) * 1961-04-20 1964-01-07 Benjamin H Hadley Smog control device and method for internal combustion engines
JP3156470B2 (ja) * 1993-11-19 2001-04-16 トヨタ自動車株式会社 排気ブレーキ付内燃機関

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19645226A1 (de) 1996-11-02 1998-05-07 Bayerische Motoren Werke Ag Mehrflutige, zur Abgasnachbehandlung ausgebildete Abgasanlage für Brennkraftmaschinen

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008025406A1 (fr) * 2006-08-31 2008-03-06 Bayerische Motoren Werke Aktiengesellschaft Ligne d'échappement pour un moteur à combustion interne
DE102007049171A1 (de) * 2007-10-13 2009-04-16 Bayerische Motoren Werke Aktiengesellschaft Abgasstrang für eine Brennkraftmaschine mit diagnosefähigem Absperrventil sowie diagnosefähiges Absperrventil
US8468804B2 (en) 2007-10-13 2013-06-25 Bayerische Motoren Werke Aktiengesellschaft Exhaust line for an internal-combustion engine having a shut-off valve with a diagnostic capability
DE102007049171B4 (de) * 2007-10-13 2020-12-17 Bayerische Motoren Werke Aktiengesellschaft Abgasstrang für eine Brennkraftmaschine mit diagnosefähigem Absperrventil sowie diagnosefähiges Absperrventil
DE102008009089A1 (de) 2008-02-14 2009-08-20 Bayerische Motoren Werke Aktiengesellschaft Verfahren und Vorrichtung zum Bestimmen eines Leckagemassenstroms aus einer Absperreinrichtung einer eine Abgasreinigungseinrichtung umgehenden Leitung
DE102008009089B4 (de) 2008-02-14 2021-11-11 Bayerische Motoren Werke Aktiengesellschaft Verfahren und Vorrichtung zum Bestimmen eines Leckagemassenstroms aus einer Absperreinrichtung einer eine Abgasreinigungseinrichtung umgehenden Leitung

Also Published As

Publication number Publication date
ATE538295T1 (de) 2012-01-15
DE102005017863A1 (de) 2006-11-02
EP1715162B1 (fr) 2011-12-21
EP1715162A3 (fr) 2007-10-10

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