US20020062642A1 - Internal combustion engine exhaust device - Google Patents

Internal combustion engine exhaust device Download PDF

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Publication number
US20020062642A1
US20020062642A1 US09/951,546 US95154601A US2002062642A1 US 20020062642 A1 US20020062642 A1 US 20020062642A1 US 95154601 A US95154601 A US 95154601A US 2002062642 A1 US2002062642 A1 US 2002062642A1
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US
United States
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.)
Abandoned
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US09/951,546
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English (en)
Inventor
Vittorio Dini
Marco Quarta
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Publication of US20020062642A1 publication Critical patent/US20020062642A1/en
Abandoned legal-status Critical Current

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    • 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.
  • 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.
  • FIG. 1 shows, schematically, an internal combustion engine exhaust device in accordance with the teachings of the present invention
  • FIG. 2 shows a view in perspective of a possible practical embodiment of the FIG. 1 exhaust device
  • FIG. 3 shows a view in perspective, with parts in section and parts removed for clarity, of a component part of the FIG. 2 exhaust device
  • FIGS. 4 and 5 show views in perspective of the FIG. 3 component part in two different operating positions.
  • 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 5 a connected directly to the engine exhaust outlets; an end portion 5 b connected directly to main catalyst 3 ; and two intermediate portions 5 c and 5 d , each for connecting end portion 5 b to initial portion 5 a.
  • Auxiliary catalyst 4 is located along one of the two intermediate portions 5 c , 5 d —in the example shown, intermediate portion 5 d ; and exhaust device 1 comprises selective connecting means, which, on command, connect initial portion 5 a of exhaust manifold 5 directly to intermediate portion 5 c or 5 d 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 pipes the whole comprising initial portion 5 a , intermediate portion 5 c , and end portion 5 b 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 5 d 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 5 c , 5 d is to be connected to initial portion 5 a 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 5 a , 5 c and 5 d 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 5 a of exhaust manifold 5 ), one of the outlets again communicates with exhaust pipe 6 ′ (i.e. intermediate portion 5 c ), and the other outlet communicates with auxiliary connecting pipe 7 (i.e. intermediate portion 5 d 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 (FIG. 4), and a second operating position closing off the inside of tubular body 20 and forcing flow through rectangular opening 22 (FIG. 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 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)
US09/951,546 2000-09-15 2001-09-14 Internal combustion engine exhaust device Abandoned US20020062642A1 (en)

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
ITB02000A000535 2000-09-15

Publications (1)

Publication Number Publication Date
US20020062642A1 true US20020062642A1 (en) 2002-05-30

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US09/951,546 Abandoned US20020062642A1 (en) 2000-09-15 2001-09-14 Internal combustion engine exhaust device

Country Status (3)

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US (1) US20020062642A1 (it)
EP (1) EP1188909A3 (it)
IT (1) ITBO20000535A1 (it)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050268600A1 (en) * 2004-06-08 2005-12-08 Nissan Motor Co., Ltd. Exhaust system of multi-cylinder internal combustion engine
DE102004057129A1 (de) * 2004-11-26 2006-06-01 Bayerische Motoren Werke Ag Abgasanlage für eine Brennkraftmaschine
US20060137330A1 (en) * 2004-06-08 2006-06-29 Nissan Motor Co., Ltd. Exhaust system of multi-cylinder internal combustion engine
US20070095052A1 (en) * 2005-08-11 2007-05-03 Takao Inoue Exhaust system of an internal combustion engine
CN100439669C (zh) * 2005-04-08 2008-12-03 日产自动车株式会社 内燃机的排气装置
CN100445523C (zh) * 2004-06-08 2008-12-24 日产自动车株式会社 多缸内燃机的排气系统
US20100024399A1 (en) * 2007-03-14 2010-02-04 Toyota Jidosha Kabushiki Kaisha Exhaust gas control apparatus for internal combustion engine
US20190301405A1 (en) * 2018-03-30 2019-10-03 Deere & Company Exhaust manifold
US11073076B2 (en) 2018-03-30 2021-07-27 Deere & Company Exhaust manifold

Families Citing this family (3)

* 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
JP4742837B2 (ja) * 2005-12-07 2011-08-10 日産自動車株式会社 内燃機関の触媒劣化診断装置および診断方法
JP4905291B2 (ja) 2007-08-09 2012-03-28 日産自動車株式会社 空燃比制御装置

Family Cites Families (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
DE58900911D1 (de) * 1988-08-26 1992-04-09 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
JPH10121996A (ja) * 1996-10-18 1998-05-12 Sumitomo Electric Ind Ltd 三方弁及びそれを用いた排気ガス処理装置

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7726119B2 (en) 2004-06-08 2010-06-01 Nissan Motor Co., Ltd. Exhaust system of multi-cylinder internal combustion engine
US20060137330A1 (en) * 2004-06-08 2006-06-29 Nissan Motor Co., Ltd. Exhaust system of multi-cylinder internal combustion engine
CN100445523C (zh) * 2004-06-08 2008-12-24 日产自动车株式会社 多缸内燃机的排气系统
US7509800B2 (en) * 2004-06-08 2009-03-31 Nissan Motor Co., Ltd. Exhaust system of multi-cylinder internal combustion engine
US20050268600A1 (en) * 2004-06-08 2005-12-08 Nissan Motor Co., Ltd. Exhaust system of multi-cylinder internal combustion engine
DE102004057129A1 (de) * 2004-11-26 2006-06-01 Bayerische Motoren Werke Ag Abgasanlage für eine Brennkraftmaschine
CN100439669C (zh) * 2005-04-08 2008-12-03 日产自动车株式会社 内燃机的排气装置
US20070095052A1 (en) * 2005-08-11 2007-05-03 Takao Inoue Exhaust system of an internal combustion engine
US7559196B2 (en) * 2005-08-11 2009-07-14 Nissan Motor Co., Ltd. Exhaust system of an internal combustion engine
US20100024399A1 (en) * 2007-03-14 2010-02-04 Toyota Jidosha Kabushiki Kaisha Exhaust gas control apparatus for internal combustion engine
US8286418B2 (en) * 2007-03-14 2012-10-16 Toyota Jidosha Kabushiki Kaisha Exhaust gas control apparatus for internal combustion engine
US20190301405A1 (en) * 2018-03-30 2019-10-03 Deere & Company Exhaust manifold
US10662904B2 (en) * 2018-03-30 2020-05-26 Deere & Company Exhaust manifold
US11073076B2 (en) 2018-03-30 2021-07-27 Deere & Company Exhaust manifold
US11384716B2 (en) 2018-03-30 2022-07-12 Deere & Company Exhaust manifold
US11486297B2 (en) 2018-03-30 2022-11-01 Deere & Company Exhaust manifold

Also Published As

Publication number Publication date
ITBO20000535A0 (it) 2000-09-15
ITBO20000535A1 (it) 2002-03-15
EP1188909A3 (en) 2003-06-04
EP1188909A2 (en) 2002-03-20

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