EP1188909A2 - Dispositif pour gaz d'échappement d'un moteur à combustion interne - Google Patents

Dispositif pour gaz d'échappement d'un moteur à combustion interne Download PDF

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Publication number
EP1188909A2
EP1188909A2 EP01122095A EP01122095A EP1188909A2 EP 1188909 A2 EP1188909 A2 EP 1188909A2 EP 01122095 A EP01122095 A EP 01122095A EP 01122095 A EP01122095 A EP 01122095A EP 1188909 A2 EP1188909 A2 EP 1188909A2
Authority
EP
European Patent Office
Prior art keywords
exhaust
internal combustion
catalyst
combustion engine
exhaust device
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Withdrawn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
EP01122095A
Other languages
German (de)
English (en)
Other versions
EP1188909A3 (fr
Inventor
Vittorio Dini
Marco Quarta
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.)
Ferrari SpA
Original Assignee
Ferrari SpA
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 Ferrari SpA filed Critical Ferrari SpA
Publication of EP1188909A2 publication Critical patent/EP1188909A2/fr
Publication of EP1188909A3 publication Critical patent/EP1188909A3/fr
Withdrawn legal-status Critical Current

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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
    • 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
    • F01N2410/00—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device
    • F01N2410/02—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device in case of high temperature, e.g. overheating of catalytic reactor

Definitions

  • the present invention relates to an internal combustion engine exhaust device.
  • the present invention relates to an exhaust device for high-performance car explosion engines, to which the following description refers purely by way of example.
  • auxiliary catalyst Unfortunately, the operating conditions of the auxiliary catalyst become increasingly severe the closer it gets to the engine exhaust outlets, so that location of the auxiliary catalyst downstream from the engine must be assessed carefully to strike the best compromise between minimizing the time taken by the auxiliary catalyst to reach working temperature, and ensuring an acceptable working life of the catalyst.
  • the stream of exhaust gases from the engine is such that, to keep polluting emissions within the prescribed limits of current pollution standards, the auxiliary catalyst would have to be located so close to the engine exhaust outlets as to result in rapid structural impairment of the catalyst. Moreover, locating the auxiliary catalyst close to the engine exhaust outlets produces counterpressures which impede outflow of the exhaust gases from the outlets and impair engine efficiency in normal operating conditions, i.e. when the main catalyst reaches working temperature.
  • auxiliary catalyst is provided internally with a bypass valve allowing the exhaust gases from the engine to bypass the active part of the auxiliary catalyst and so reduce the thermal stress to which the catalyst is subjected.
  • auxiliary catalysts with bypass valves continue to produce counterpressures at the engine exhaust outlets, as well as undesired dynamic pulsations, thus impairing the performance and overall efficiency of the explosion engine. Though negligible when dealing with conventional explosion engines, such impairment is totally unacceptable in the case of explosion engines of high-performance vehicles.
  • an exhaust device for internal combustion engines comprising a main catalyst, an auxiliary catalyst, and an exhaust manifold connecting the input of the main catalyst to the exhaust outlets of a generic internal combustion engine, so as to feed the exhaust gases from said exhaust outlets to the main catalyst;
  • said exhaust manifold may selectively assume a first operating configuration connecting the input of the main catalyst to the output of the auxiliary catalyst, and the input of the auxiliary catalyst to said internal combustion engine, and a second operating configuration connecting the input of the main catalyst directly to the internal combustion engine and excluding the auxiliary catalyst.
  • number 1 indicates as a whole an internal combustion engine exhaust device, particularly suitable for connection to the explosion engine 2 of any vehicle, and particularly to the explosion engine of a high-performance vehicle.
  • Exhaust device 1 is connected to the exhaust outlets (not shown) of explosion engine 2 of the vehicle to expel from the vehicle the exhaust gases produced by the engine, while at the same time reducing the noise level of the engine and converting the polluting substances in the engine exhaust gases into substances less damaging to the environment.
  • exhaust device 1 comprises a main catalyst 3; an auxiliary catalyst 4; and an exhaust manifold 5 for connecting the input of main catalyst 3 to the exhaust outlets of explosion engine 2, so as to feed the exhaust gases from the exhaust outlets to main catalyst 3.
  • Auxiliary catalyst 4 is a conventional type with no bypass valve, integrated or otherwise; and exhaust manifold 5 may selectively assume two distinct operating configurations: a first in which the exhaust gases are fed through auxiliary catalyst 4 before reaching the input of main catalyst 3; and a second in which the exhaust gases are fed directly to the input of main catalyst 3, without going through auxiliary catalyst 4.
  • exhaust manifold 5 is divided into an initial portion 5a connected directly to the engine exhaust outlets; an end portion 5b connected directly to main catalyst 3; and two intermediate portions 5c and 5d, each for connecting end portion 5b to initial portion 5a.
  • Auxiliary catalyst 4 is located along one of the two intermediate portions 5c, 5d - in the example shown, intermediate portion 5d; and exhaust device 1 comprises selective connecting means, which, on command, connect initial portion 5a of exhaust manifold 5 directly to intermediate portion 5c or 5d respectively, so as to feed the exhaust gases from explosion engine 2 through main catalyst 3 only, or successively through auxiliary catalyst 4 and main catalyst 3.
  • exhaust manifold 5 the whole comprising initial portion 5a, intermediate portion 5c, and end portion 5b of exhaust manifold 5 is defined by a single connecting pipe 6, which, before reaching the exhaust outlets of the engine, is divided into four smaller-section pipes, each connected directly to a respective exhaust outlet of explosion engine 2.
  • the smaller-section pipes are commonly referred to as “exhaust pipes” and indicated 6' in the following description.
  • intermediate portion 5d of exhaust manifold 5 is defined by a series of auxiliary connecting pipes 7, a first of which connects the output of auxiliary catalyst 4 to connecting pipe 6, between main catalyst 3 and the point at which connecting pipe 6 divides into the four exhaust pipes 6'.
  • the other auxiliary connecting pipes 7 each connect the input of auxiliary catalyst 4 to a respective exhaust pipe 6'.
  • the selective connecting means for selecting which of the two intermediate portions 5c, 5d is to be connected to initial portion 5a of exhaust manifold 5 are defined by a group of three-way valves 8, preferably, but not necessarily, electrically controlled, and each located at the point at which a respective auxiliary connecting pipe 7 is connected to the corresponding exhaust pipe 6', i.e. at the point at which portions 5a, 5c and 5d of exhaust manifold 5 join.
  • each three-way valve 8 is located at the connection of auxiliary connecting pipe 7 to the corresponding exhaust pipe 6', so that the inlet communicates with exhaust pipe 6' (i.e. with initial portion 5a of exhaust manifold 5), one of the outlets again communicates with exhaust pipe 6' (i.e. intermediate portion 5c), and the other outlet communicates with auxiliary connecting pipe 7 (i.e. intermediate portion 5d of exhaust manifold 5).
  • each three-way valve 8 may preferably, though not necessarily, be defined by a rotary slide valve comprising a tubular, substantially rectangular-section body 20 through which the exhaust gases flow.
  • Tubular body 20 is defined by a portion of exhaust pipe 6', and has, at a lateral portion 21, a rectangular opening 22 to which auxiliary connecting pipe 7 fits.
  • the rotary slide valve also comprises a shutter 23, which pivots inside tubular body 20 so as to rotate, about a transverse axis A, between a first operating position closing rectangular opening 22 and permitting flow through tubular body 20 (Figure 4), and a second operating position closing off the inside of tubular body 20 and forcing flow through rectangular opening 22 (Figure 5); and a hydraulic or electric actuator 24 for rotating shutter 23, on command, between the above two operating positions.
  • one hydraulic or electric actuator 24 provides for simultaneously rotating shutter 23 and all four valves 8.
  • exhaust device 1 is designed to assume, on command, two distinct configurations : one designed to effectively combat polluting emissions during the time taken for main catalyst 3 to reach working temperature; and the other to ensure optimum performance of explosion engine 2 once main catalyst 3 reaches working temperature.
  • the engine exhaust gases are fed sequentially through the initial portions of exhaust pipes 6', the first group of auxiliary connecting pipes 7, auxiliary catalyst 4, the remaining auxiliary connecting pipe 7, the end portion of connecting pipe 6, and main catalyst 3.
  • auxiliary catalyst 4 is isolated, and the engine exhaust gases are fed through connecting pipe 6 (including, obviously, exhaust pipes 6') and main catalyst 3.
  • auxiliary catalyst 4 is unaffected by passage of the exhaust gases, and the exhaust outlets of explosion engine 2 are connected to main catalyst 3 solely by connecting pipe 6, so that the length, section and shape of connecting pipe 6 as a whole can be designed for maximum engine efficiency and performance.
  • the length, section and shape of exhaust pipes 6' defining the initial portion of connecting pipe 6 can be designed to achieve maximum outflow of the exhaust gases from the engine.
  • auxiliary catalyst 4 may be located extremely close to the exhaust outlets of explosion engine 2, thus minimizing the time taken for it to reach working temperature, while in no way impairing its average working life.
  • exhaust device 1 The ability of exhaust device 1 to assume two distinct configurations - one for combating polluting emissions when cold-starting the engine, and the other for operating explosion engine 2 once main catalyst 3 reaches working temperature - provides for optimizing both operating modes, without one conditioning the other.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust Silencers (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
EP01122095A 2000-09-15 2001-09-14 Dispositif pour gaz d'échappement d'un moteur à combustion interne Withdrawn EP1188909A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2000BO000535A ITBO20000535A1 (it) 2000-09-15 2000-09-15 Dispositivo di scarico per motori a conbustione interna
ITBO000535 2000-09-15

Publications (2)

Publication Number Publication Date
EP1188909A2 true EP1188909A2 (fr) 2002-03-20
EP1188909A3 EP1188909A3 (fr) 2003-06-04

Family

ID=11438725

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01122095A Withdrawn EP1188909A3 (fr) 2000-09-15 2001-09-14 Dispositif pour gaz d'échappement d'un moteur à combustion interne

Country Status (3)

Country Link
US (1) US20020062642A1 (fr)
EP (1) EP1188909A3 (fr)
IT (1) ITBO20000535A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10258850A1 (de) * 2002-12-17 2004-07-08 Volkswagen Ag Vorrichtung zur Nachbehandlung von Abgasen einer Brennkraftmaschine
EP1605145A1 (fr) * 2004-06-08 2005-12-14 Nissan Motor Company, Limited Système d'échappement d'une moteur à combustion interne à plusieurs cylindres
EP1710408A1 (fr) * 2005-04-08 2006-10-11 Nissan Motor Co., Ltd. Dispositif d'échappement pour un moteur à combustion interne
EP1752634A1 (fr) * 2005-08-11 2007-02-14 Nissan Motor Company Limited Système d'échappement
EP2022968A1 (fr) * 2007-08-09 2009-02-11 Nissan Motor Co., Ltd. Dispositif de contrôle de rapport air-combustible
EP1795723A3 (fr) * 2005-12-07 2009-03-25 Nissan Motor Company Limited Système d'échappement
US7509800B2 (en) 2004-06-08 2009-03-31 Nissan Motor Co., Ltd. Exhaust system of multi-cylinder internal combustion engine

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4400320B2 (ja) * 2004-06-08 2010-01-20 日産自動車株式会社 多気筒内燃機関の排気装置
DE102004057129A1 (de) * 2004-11-26 2006-06-01 Bayerische Motoren Werke Ag Abgasanlage für eine Brennkraftmaschine
JP4462282B2 (ja) * 2007-03-14 2010-05-12 トヨタ自動車株式会社 内燃機関の排気制御装置
US10662904B2 (en) * 2018-03-30 2020-05-26 Deere & Company Exhaust manifold
US11073076B2 (en) 2018-03-30 2021-07-27 Deere & Company Exhaust manifold

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0355489A1 (fr) * 1988-08-26 1990-02-28 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Conduit de gaz d'échappement d'un moteur à combustion interne à branches multiples
DE3828644A1 (de) * 1988-08-24 1990-03-01 Bayerische Motoren Werke Ag Verzweigte abgasleitung einer brennkraftmaschine
US5377486A (en) * 1993-05-17 1995-01-03 Ford Motor Company Catalytic converter system
DE19500996A1 (de) * 1995-01-14 1996-07-18 Daimler Benz Ag Bypassventil einer Brennkraftmaschine
EP0837227A1 (fr) * 1996-10-18 1998-04-22 Sumitomo Electric Industries, Ltd. Vanne à trois voies et purificateur de gaz d'échappement comportant une telle vanne

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3828644A1 (de) * 1988-08-24 1990-03-01 Bayerische Motoren Werke Ag Verzweigte abgasleitung einer brennkraftmaschine
EP0355489A1 (fr) * 1988-08-26 1990-02-28 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Conduit de gaz d'échappement d'un moteur à combustion interne à branches multiples
US5377486A (en) * 1993-05-17 1995-01-03 Ford Motor Company Catalytic converter system
DE19500996A1 (de) * 1995-01-14 1996-07-18 Daimler Benz Ag Bypassventil einer Brennkraftmaschine
EP0837227A1 (fr) * 1996-10-18 1998-04-22 Sumitomo Electric Industries, Ltd. Vanne à trois voies et purificateur de gaz d'échappement comportant une telle vanne

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10258850A1 (de) * 2002-12-17 2004-07-08 Volkswagen Ag Vorrichtung zur Nachbehandlung von Abgasen einer Brennkraftmaschine
US7509800B2 (en) 2004-06-08 2009-03-31 Nissan Motor Co., Ltd. Exhaust system of multi-cylinder internal combustion engine
EP1605145A1 (fr) * 2004-06-08 2005-12-14 Nissan Motor Company, Limited Système d'échappement d'une moteur à combustion interne à plusieurs cylindres
US7726119B2 (en) 2004-06-08 2010-06-01 Nissan Motor Co., Ltd. Exhaust system of multi-cylinder internal combustion engine
EP1710408A1 (fr) * 2005-04-08 2006-10-11 Nissan Motor Co., Ltd. Dispositif d'échappement pour un moteur à combustion interne
US7441400B2 (en) 2005-04-08 2008-10-28 Nissan Motor Co., Ltd. Exhaust system for an internal combustion engine
EP1752634A1 (fr) * 2005-08-11 2007-02-14 Nissan Motor Company Limited Système d'échappement
US7559196B2 (en) 2005-08-11 2009-07-14 Nissan Motor Co., Ltd. Exhaust system of an internal combustion engine
EP1795723A3 (fr) * 2005-12-07 2009-03-25 Nissan Motor Company Limited Système d'échappement
US7748213B2 (en) 2005-12-07 2010-07-06 Nissan Motor Co., Ltd. Exhaust system
EP2022968A1 (fr) * 2007-08-09 2009-02-11 Nissan Motor Co., Ltd. Dispositif de contrôle de rapport air-combustible
US8176728B2 (en) 2007-08-09 2012-05-15 Nissan Motor Co., Ltd. Air-fuel ratio control device
US8607545B2 (en) 2007-08-09 2013-12-17 Nissan Motor Co., Ltd. Air-fuel ratio control device

Also Published As

Publication number Publication date
EP1188909A3 (fr) 2003-06-04
US20020062642A1 (en) 2002-05-30
ITBO20000535A0 (it) 2000-09-15
ITBO20000535A1 (it) 2002-03-15

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