EP1989413B1 - Abgasanordnung zur optimierung der leistungen von brennkraftmaschinen für kraftfahrzeuge - Google Patents

Abgasanordnung zur optimierung der leistungen von brennkraftmaschinen für kraftfahrzeuge Download PDF

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Publication number
EP1989413B1
EP1989413B1 EP06809098A EP06809098A EP1989413B1 EP 1989413 B1 EP1989413 B1 EP 1989413B1 EP 06809098 A EP06809098 A EP 06809098A EP 06809098 A EP06809098 A EP 06809098A EP 1989413 B1 EP1989413 B1 EP 1989413B1
Authority
EP
European Patent Office
Prior art keywords
tubes
exhaust assembly
manifold
assembly according
tube
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.)
Not-in-force
Application number
EP06809098A
Other languages
English (en)
French (fr)
Other versions
EP1989413A1 (de
Inventor
Alessandro Gilli
Davide Branchini
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.)
Supersprint SRL
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Supersprint SRL
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Filing date
Publication date
Application filed by Supersprint SRL filed Critical Supersprint SRL
Priority to SI200630634T priority Critical patent/SI1989413T1/sl
Publication of EP1989413A1 publication Critical patent/EP1989413A1/de
Application granted granted Critical
Publication of EP1989413B1 publication Critical patent/EP1989413B1/de
Not-in-force 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
    • 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
    • F01N13/08—Other arrangements or adaptations of exhaust conduits

Definitions

  • the present invention relates to an exhaust assembly for optimising the performances of internal combustion engines of the aspirated type for motorcars.
  • the present invention relates to an exhaust assembly for optimising the performance of a normally aspirated internal combustion engine with at least 10 cylinders split into two cylinder heads.
  • an exhaust assembly for optimising the performances of an internal combustion engine for motorcars in which the exhaust unit comprises two exhaust gas conveying devices, each of which has a manifold and at least five tubes, each of which is fastened to a fastening flange to a respective cylinder and is connected to the manifold in common to the five tubes.
  • the exhaust assembly described above has the drawback of being particularly cumbersome, due to the high number of tubes and being difficult to install in the engine bay of a motorcar due to the reduced available space. These difficulties are amplified by the fact that, in order to optimise the performances of the internal combustion engine, it is suitable for the tubes to have the same dynamic behaviour in relation to resistance to exhaust gas flow output by the respective cylinders. Generally, the dynamic balance between the various tubes is obtained by adopting essentially the same length for all tubes and maintaining the aforesaid tubes as straight as possible.
  • the object of the present invention is to make an exhaust assembly for optimising the performances of internal combustion engines of the aspirated type for motorcars which is free from the aforesaid drawbacks without for this negatively effecting the performances of the internal combustion engine.
  • an exhaust assembly for optimising the performances of an internal combustion engine, in particular of an engine of the aspirated type with at least ten cylinders split into two cylinder heads, each cylinder head being provided with at least five cylinders, the exhaust assembly comprising two exhaust gas conveying devices, wherein each device comprises a manifold and at least five tubes, each of which has a fastening flange to a respective cylinder and is connected to the manifold; the exhaust assembly being characterised in that each tube of a device has a different length and a different shape from the other tubes of the same device; the tubes having a shorter length extend along a more tortuous path than the path of the tubes having a longer length.
  • number 1 indicates as a whole an exhaust unit for optimising the performances of internal combustion engines of the aspirated type for motorcars.
  • the internal combustion engine of the known type is not shown in the accompanying figures and comprises two cylinder heads, along which five cylinders are aligned.
  • Assembly 1 comprises two devices 2 for conveying exhaust gas of a respective cylinder head.
  • Each device 2 is associated to a corresponding cylinder head and comprises a manifold 3 and five tubes 4, each of which has on one first end a flange 5 for coupling the tube 4 to a corresponding cylinder and a second end connected to manifold 3 by means of a releasable attachment 6 of the known type.
  • Tubes 4 have a circular cross section, which is kept constant for the entire length of tubes 4 and which has a diameter from 40 to 45 mm, and are formed by a plurality of curved segments and straight segments joined together.
  • the respective lengths and also the respective shapes of the five tubes 4 of a same device 2 differ one from the other.
  • Flanges 5 of a same device 2 are arranged at different distances from manifold 3 and, consequently, tubes 4 are of different length, but thanks to the numerous curved segments and to the different shapes conferred to tubes 4, the lengths of tubes 4 vary in a range lower than the range existing between the distance laying between manifold 3 and the flange 5 most distant from manifold 3 and the distance laying between manifold 3 and the flange 5 closest to manifold 3.
  • the load losses generated in a long and relatively straight tube 4 are essentially equal to the load losses of shorter tube 4 developed along a more tortuous path. This allows the exhaust gases expelled by the cylinders of one cylinder head to reach manifold 3 at the same time regardless of tube 4 along which the exhaust gases are conveyed.
  • each device 2 comprises tubes 4 whose length is different from that of the other tubes 4 and in which the difference of length is comprised in a certain range.
  • minor load loss compensations are possible thanks to the different conformation of the curved segments associated to tubes 4.
  • the curved segments of short tubes 4 have a higher curvature with respect to the curvature of the curved segments of long tubes 4 so as to allow, on one hand, to contain the differences of length of tubes 4 and to uniform the load losses of the tubes 4 themselves.
  • the curved segments and the straight segments of each tube 4 may be selected according to the conformation which minimises the dimensions of device 2.
  • each flange 5 is fixed directly to a curved end segment 7 of each tube 4 which determines a sudden deviation of path with respect to the ideal axis of flange 5.
  • This feature is common to all tubes 4 and is particularly effective in containing the dimensions of each device 2.
  • Each tube 4 has a straight end segment 8, which is arranged on the opposite end of curved segment 7 and which converges into manifold 3, which has a union 9, in which the five tubes 4 are inserted and to which the tubes 4 are secured by means of releasable attachment 8.
  • Figure 2 shows a device 2 made according to a variant which envisages the non-releasable fastening of tubes 4 to manifold 3.
  • tubes 4 are welded directly to union 9.
  • the advantages which derive from the present invention essentially consist in containing dimensions without compromising optimisation of the performances of the internal combustion engine with respect, for example, to a straight tube exhaust assembly. If tubes 4 are connected by means of releasable attachment 8, assembly 1 is easier to install because the engine does not need to be extracted from the engine bay for assembly and disassembly of assembly 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Exhaust-Gas Circulating Devices (AREA)
  • Valve Device For Special Equipments (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Claims (9)

  1. Auspuffanordnung zum Optimieren der Leistungen eines Verbrennungsmotors, insbesondere eines Saugmotors mit wenigstens zehn Zylindern, die auf zwei Zylinderköpfe aufgeteilt sind, wobei jeder Zylinderkopf mit zumindest fünf Zylindern versehen ist, wobei die Auspuffanordnung (1) zwei Abgasführungseinrichtungen (2) umfasst, von denen jede Einrichtung (2) einen Sammler (3) und wenigstens fünf Rohre (4) aufweist, von denen jedes einen Befestigungsflansch (5) für einen zugehörigen Zylinder hat und mit dem Sammler (3) verbunden ist, wobei die Auspuffanordnung dadurch gekennzeichnet ist, dass jedes Rohr (4) einer Einrichtung (2) eine andere Länge und eine andere Gestalt als die anderen Rohre (4) derselben Einrichtung (2) hat, wobei die Rohre (4) mit einer kürzeren Länge sich entlang eines gewundeneren Pfades erstrecken als der Pfad der Rohre (4) mit einer größeren Länge.
  2. Anordnung nach Anspruch 1,
    dadurch gekennzeichnet, dass jedes Rohr (4) mehrere gekrümmte Segmente und mehrere gerade Segmente aufweist.
  3. Anordnung nach Anspruch 1 oder 2,
    dadurch gekennzeichnet, dass jedes Rohr über seine gesamte Länge einen konstanten Querschnitt hat.
  4. Anordnung nach Anspruch 3,
    dadurch gekennzeichnet, dass alle Rohre (4) einen konstanten Querschnitt haben.
  5. Auspuffanordnung nach Anspruch 3 oder 4,
    dadurch gekennzeichnet, dass der kreisförmige Querschnitt einen Durchmesser von 40 bis 45 mm hat.
  6. Auspuffanordnung nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass jedes Rohr (4) ein unmittelbar an dem Flansch (5) befestigtes, gekrümmtes Endsegment (7) aufweist.
  7. Auspuffanordnung nach einem der vorhergehenden Ansprüche,
    dadurch gekennzeichnet, dass jedes Rohr (4) ein unmittelbar mit dem Sammler (3) verbundenes, gerades Endsegment (8) aufweist.
  8. Auspuffanordnung nach einem der vorhergehenden Ansprüche,
    gekennzeichnet durch eine lösbare Befestigung (6) zum Verbinden der Rohre (4) mit dem Sammler (3).
  9. Auspuffanordnung nach einem der Ansprüche 1 bis 7,
    dadurch gekennzeichnet, dass die Rohre (4) auf eine nicht lösbare Art und Weise mit dem Sammler (3) verbunden sind.
EP06809098A 2006-02-14 2006-10-23 Abgasanordnung zur optimierung der leistungen von brennkraftmaschinen für kraftfahrzeuge Not-in-force EP1989413B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200630634T SI1989413T1 (sl) 2006-02-14 2006-10-23 Izpušni sestav za optimiranje moči motorjev z notranjim izgorevanjem za motorna vozila

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000055U ITMI20060055U1 (it) 2006-02-14 2006-02-14 Gruppo di scarico per ottimizzare le prestazioni dei motori a combustione interna per autoveicoli
PCT/IB2006/002961 WO2007093843A1 (en) 2006-02-14 2006-10-23 Exhaust assembly for optimising the performances of internal combustion engines for motorcars

Publications (2)

Publication Number Publication Date
EP1989413A1 EP1989413A1 (de) 2008-11-12
EP1989413B1 true EP1989413B1 (de) 2010-02-17

Family

ID=37896005

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06809098A Not-in-force EP1989413B1 (de) 2006-02-14 2006-10-23 Abgasanordnung zur optimierung der leistungen von brennkraftmaschinen für kraftfahrzeuge

Country Status (6)

Country Link
EP (1) EP1989413B1 (de)
AT (1) ATE458135T1 (de)
DE (1) DE602006012379D1 (de)
IT (1) ITMI20060055U1 (de)
SI (1) SI1989413T1 (de)
WO (1) WO2007093843A1 (de)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3089678B2 (ja) * 1991-02-21 2000-09-18 スズキ株式会社 内燃機関の排気マニホールド
JPH11200856A (ja) * 1998-01-13 1999-07-27 Daihatsu Motor Co Ltd 内燃機関における排気マニホールドの構造
JP2001055920A (ja) * 1999-08-18 2001-02-27 Honda Motor Co Ltd 排気管の接続構造
JP2001073761A (ja) * 1999-09-07 2001-03-21 Kawasaki Heavy Ind Ltd ２サイクル多気筒エンジン
JP2004353583A (ja) * 2003-05-29 2004-12-16 Calsonic Kansei Corp エキゾーストマニホールドの集合部構造

Also Published As

Publication number Publication date
WO2007093843A1 (en) 2007-08-23
DE602006012379D1 (de) 2010-04-01
SI1989413T1 (sl) 2010-06-30
ITMI20060055U1 (it) 2007-08-15
ATE458135T1 (de) 2010-03-15
EP1989413A1 (de) 2008-11-12

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