EP0648921B1 - Exhaust system - Google Patents
Exhaust system Download PDFInfo
- Publication number
- EP0648921B1 EP0648921B1 EP94116035A EP94116035A EP0648921B1 EP 0648921 B1 EP0648921 B1 EP 0648921B1 EP 94116035 A EP94116035 A EP 94116035A EP 94116035 A EP94116035 A EP 94116035A EP 0648921 B1 EP0648921 B1 EP 0648921B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- exhaust
- cylinders
- internal combustion
- elbow
- combustion engine
- 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.)
- Expired - Lifetime
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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 ; 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
- F01N13/04—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 silencers in parallel, e.g. having interconnections for multi-cylinder engines
-
- 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
- F01N13/08—Other arrangements or adaptations of exhaust conduits
-
- 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
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
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- 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
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
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- 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
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B75/22—Multi-cylinder engines with cylinders in V, fan, or star arrangement
- F02B75/224—Multi-cylinder engines with cylinders in V, fan, or star arrangement with cylinders in fan arrangement
-
- 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
- F01N13/14—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 thermal insulation
-
- 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
- F02B75/00—Other engines
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
- F02B75/18—Multi-cylinder engines
- F02B2075/1804—Number of cylinders
- F02B2075/1848—Number of cylinders twelve
Definitions
- the invention relates to an exhaust system for a W-12 reciprocating piston internal combustion engine with three rows of cylinders, each with four cylinders, according to the preamble of claim 1.
- Such an internal combustion engine can be found in JP-A-3096635, in which six cylinders are each connected to a separate exhaust pipe and are each provided with a lambda probe, via which the exhaust gas composition can be monitored and an electronic engine control system can be connected for control purposes.
- six cylinders of an outer row of cylinders and two cylinders of the middle row of cylinders are combined, which, however, results in a relatively complex engine control and exhaust gas routing, which, for example, also complicates the shutdown of six cylinders to save fuel with lower power requirements of the internal combustion engine.
- the object of the invention is to propose an exhaust system for generic W-12 internal combustion engines, which is functionally and technically advantageous with justifiable structural outlay.
- two exhaust lines are provided, to which two cylinders of the internal combustion engine are connected per cylinder row.
- such an exhaust system split in this way is advantageously simplified both with regard to the assembly on the internal combustion engine and the laying of the pipe system on the motor vehicle.
- the cylinders per row of cylinders can be connected to yoke-shaped manifold sections arranged on the end face of the internal combustion engine, which are connected to the exhaust gas system with a three-way catalytic converter.
- the yoke-shaped manifold sections can preferably be structurally combined to form a double-flow exhaust manifold.
- the specified cylinders can be connected to one manifold section and the other cylinders to the other manifold section in the given firing order. This enables a good coordination with regard to the performance of the internal combustion engine with pressure pulsations or exhaust gas emissions distributed evenly over time.
- a structurally favorable routing of the exhaust pipes from the exhaust ports of the cylinder heads of the internal combustion engine to the exhaust manifold is additionally provided by the features of claims 5 and 6. According to claim 7, it is also proposed to make these exhaust pipes thermally insulated in a manner known per se in order to prevent undesirable heating in the engine environment avoid and ensure a quick response of the exhaust gas detoxification.
- the W-12 four-stroke reciprocating piston internal combustion engine 20 shown in FIGS. 1 to 3 has three rows of cylinders 22, 24, 26 in a W arrangement, each with four cylinders (numbering 1-12). As shown in FIG. 2, the middle row of cylinders 24 in the exemplary embodiment is arranged upright, while the outer rows of cylinders 22, 26 are aligned at 60 ° to the middle row of cylinders 24.
- the exhaust system is divided into two exhaust lines (see FIG. 1) 28, 30, one exhaust line 28 to cylinders 1 and 4 of cylinder bank 22, to cylinders 6 and 7 of middle cylinder bank 24 and to cylinders 9 and 12 the third row of cylinders 26 is connected.
- the exhaust line 30 is accordingly connected to the respectively remaining cylinders 2 and 3, 5 and 8 and 10 and 11 of the cylinder banks 22, 24, 26.
- the exhaust gas line 28 is composed of the exhaust gas lines 32, 34, 36, 38, 40, 42 which adjoin the exhaust ports in the cylinder heads of the internal combustion engine (if not of conventional design), which exhaust lines open into a manifold section 44 of a common exhaust manifold 46.
- an exhaust gas pipe 48 branches off from the manifold section 44, into which a lambda probe (not shown) is inserted in the usual way and which is connected to a three-way catalytic converter 50.
- the exhaust gas flows via the three-way catalytic converter to the further exhaust system of the internal combustion engine, which can be of conventional design and is therefore not shown.
- Exhaust line 30 likewise has two exhaust lines 52, 54 on first row of cylinders 22, two exhaust lines 56, 58 on middle row of cylinders 24 and two exhaust lines 60, 62 on third row of cylinders 26, which extend into second manifold section 64 of exhaust manifold 46 flow out. From this manifold section 64 a second exhaust pipe 66 comes off, which is connected to a second catalytic converter 68.
- the exhaust pipes of one exhaust line 28 are connected to cylinders 1 and 4 of one row of cylinders 22, connected to the cylinders 6 and 7 of the middle row of cylinders 24 and to the cylinders 9 and 12 of the third row of cylinders 26, while the remaining cylinders are connected to the second exhaust line 30 as described above.
- the exhaust pipes 36, 38 and 56, 58 are arranged in a free space 70 which is formed between the two rows of cylinders 22, 24 and which is covered by a line section 72 of the intake system of the internal combustion engine, which is not explained in detail .
- the exhaust pipes 32, 34 and 52, 54 of the left outer row of cylinders 22 and the exhaust pipes 40, 42 and 60, 62 of the right outer row of cylinders 26 each lie approximately vertically below their cylinder heads, which results in an arrangement of the exhaust pipes which is favorable in terms of installation space .
- these exhaust pipes lead into the yoke-shaped exhaust manifold 46, which is divided into two channels by a partition 74 and is installed on the power-transmitting end face 76 of the internal combustion engine.
- the exhaust gas pipes 48, 66 of the separate exhaust lines 28, 30 are connected to the double-flow exhaust manifold 46.
- the exhaust pipes 32, 34, 36, 38, 40, 42 and 52, 54, 56, 58, 60, 62 are provided with thermal insulation (double-skin with inserted insulating mats!).
- the exhaust manifold 46 and the exhaust gas pipes 48, 66 up to the catalysts 50, 68 are isolated.
- a lambda probe is provided for each exhaust gas pipe, which is connected to the dual engine control provided for six cylinders in a known manner in terms of control technology.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Silencers (AREA)
- Exhaust Gas After Treatment (AREA)
Description
Die Erfindung betrifft eine Abgasanlage für eine W-12 Hubkolbenbrennkraftmaschine mit drei Zylinderreihen zu je vier Zylinder, gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to an exhaust system for a W-12 reciprocating piston internal combustion engine with three rows of cylinders, each with four cylinders, according to the preamble of
Eine derartige Brennkraftmaschine ist der JP-A-3096635 entnehmbar, bei der jeweils sechs Zylinder an eine separate Abgasleitung angeschlossen und mit je einer Lambdasonde versehen sind, über die die Abgaszusammensetzung überwachbar und regelungstechnisch einer elektronischen Motorsteuerung aufschaltbar ist. Dabei sind jeweils vier Zylinder einer äußeren Zylinderreihe und zwei Zylinder der mittleren Zylinderreihe zusammengefaßt, wodurch sich jedoch eine relativ aufwendige Motorsteuerung und Abgasführung ergibt, die beispielsweise auch die Abschaltung von sechs Zylindern zur Kraftstoffeinsparung bei geringeren Leistungsanforderungen der Brennkraftmaschine kompliziert.Such an internal combustion engine can be found in JP-A-3096635, in which six cylinders are each connected to a separate exhaust pipe and are each provided with a lambda probe, via which the exhaust gas composition can be monitored and an electronic engine control system can be connected for control purposes. In this case, four cylinders of an outer row of cylinders and two cylinders of the middle row of cylinders are combined, which, however, results in a relatively complex engine control and exhaust gas routing, which, for example, also complicates the shutdown of six cylinders to save fuel with lower power requirements of the internal combustion engine.
Aufgabe der Erfindung ist es, eine Abgasanlage für gattungsgemäße W-12 Brennkraftmaschinen vorzuschlagen, die bei vertretbarem baulichen Aufwand funktionell und steuerungstechnisch vorteilhaft ist.The object of the invention is to propose an exhaust system for generic W-12 internal combustion engines, which is functionally and technically advantageous with justifiable structural outlay.
Diese Aufgabe wird erfindungsgemäß mit den Merkmalen des Patentanspruches 1 gelöst. Vorteilhafte Weiterbildungen der Erfindung sind den weiteren Patentansprüchen entnehmbar.This object is achieved with the features of
Erfindungsgemäß sind zwei Abgasstränge vorgesehen, an die je Zylinderreihe zwei Zyinder der Brennkraftmaschine angeschlossen sind. Dies ergibt eine zweifache Sechszylinder-Verteilung, wobei die gesamte Motorsteuerung mit der aufgeschalteten Lambdaregelung entsprechend zweifach ausgebildet sien kann. Daraus resultiert eine funktional gut beherrschbare Motorsteuerung, die bei nur geringen Leistungsanforderungen auch einen verbrauchsoptimierten Betrieb der Brennkraftmaschine nur als Sechzylinder-Motor gestattet. Darüberhinaus ist eine derart gesplittete Abgasanlage sowohl hinsichtlich der Montage an der Brennkraftmaschine als auch der Verlegung des Rohrsystems am Kraftfahrzeug vorteilhaft vereinfacht.According to the invention, two exhaust lines are provided, to which two cylinders of the internal combustion engine are connected per cylinder row. This results in a two-fold six-cylinder distribution, and the entire engine control system can be designed twice in accordance with the activated lambda control. This results in a functionally well controllable engine control system which, with only low performance requirements, also enables consumption-optimized operation of the internal combustion engine only permitted as a six-cylinder engine. In addition, such an exhaust system split in this way is advantageously simplified both with regard to the assembly on the internal combustion engine and the laying of the pipe system on the motor vehicle.
Besonders zweckmäßig können die Zylinder je Zylinderreihe an stirnseitig der Brennkraftmaschine angeordnete jochförmige Krümmerabschnitte angeschlossen sein, die mit der weiterführenden Abgasanlage mit Dreiwege-Katalysator verbunden sind. Bevorzugt können ferner die jochförmigen Krümmerabschnitte zu einem zweiflutigen Abgaskrümmer baulich vereint sein.Particularly expediently, the cylinders per row of cylinders can be connected to yoke-shaped manifold sections arranged on the end face of the internal combustion engine, which are connected to the exhaust gas system with a three-way catalytic converter. Furthermore, the yoke-shaped manifold sections can preferably be structurally combined to form a double-flow exhaust manifold.
Gemäß Patentanspruch 4 können bei der vorgegebenen Zündfolge die angegebenen Zylinder mit dem einen Krümmerabschnitt und die übrigen Zylinder mit dem anderen Krümmerabschnitt verbunden sein. Dies ermöglicht eine hinsichtlich der Leistung der Brennkraftmaschine gute Abstimmung bei zeitlich gleichmäßig verteilten Druckpulsationen bzw. Abgasausstößen.According to claim 4, the specified cylinders can be connected to one manifold section and the other cylinders to the other manifold section in the given firing order. This enables a good coordination with regard to the performance of the internal combustion engine with pressure pulsations or exhaust gas emissions distributed evenly over time.
Eine baulich günstige Verlegung der Abgasleitungen von den Auslaßkanälen der Zylinderköpfe der Brennkraftmaschine zum Abgaskrümmer ergibt sich zusätzlich durch die Merkmale der Patentansprüche 5 und 6. Gemäß Anspruch 7 wird zudem vorgeschlagen, diese Abgasleitungen in an sich bekannter Weise wärmeisoliert auszuführen, um unerwünschte Aufheizungen im Motorumfeld zu vermeiden und ein schnelles Ansprechen der Abgasentgiftung sicherzustellen.A structurally favorable routing of the exhaust pipes from the exhaust ports of the cylinder heads of the internal combustion engine to the exhaust manifold is additionally provided by the features of
Ein Ausführungsbeispiel der Erfindung in im folgenden mit weiteren Einzelheiten näher erläutert. Die anliegende Zeichnung zeigt in
- Fig. 1
- ein Blockschaltbild einer Abgasanlage für eine W-12 Hubkolbenbrennkraftmaschine mit zwei separaten Abgassträngen;
- Fig. 2
- einen Querschnitt durch eine teilweise dargestellte W-12 Hubkolbenbrennkaftmaschine mit Anordnung der von den Auslaßkanälen der Brennkraftmaschine abgehenden Abgasleitungen; und
- Fig. 3
- eine schematische Ansicht auf die Stirnseite der Brennkraftmaschine mit angebautem jochförmigen Abgaskrümmer.
- Fig. 1
- a block diagram of an exhaust system for a W-12 reciprocating internal combustion engine with two separate exhaust lines;
- Fig. 2
- a cross section through a partially shown W-12 reciprocating internal combustion engine with arrangement of the exhaust pipes coming from the exhaust ports of the internal combustion engine; and
- Fig. 3
- is a schematic view of the front of the internal combustion engine with attached yoke-shaped exhaust manifold.
Die in den Fig. 1 bis 3 dargestellte W-12 Viertakt-Hubkolbenbrennkraftmaschine 20 weist drei Zylinderreihen 22,24,26 in W-Anordnung mit je vier Zylindern (Numerierung von 1 - 12) auf. Wie Fig. 2 zeigt, ist die mittlere Zylinderreihe 24 im Ausführungsbeispiel stehend angeordnet, während die äußeren Zylinderreihen 22,26 um 60° umfangsversetzt zur mittleren Zylinderreihe 24 ausgerichtet sind.The W-12 four-stroke reciprocating piston
Die Abgasanlage ist in zwei Abgasstränge (vgl. Fig. 1) 28,30 aufgeteilt, wobei der eine Abgasstrang 28 an die Zylinder 1 und 4 der Zylinderreihe 22, an die Zylinder 6 und 7 der mittleren Zylinderreihe 24 und an die Zylinder 9 und 12 der dritten Zylinderreihe 26 angeschlossen ist. Der Abgasstrang 30 ist dementsprechend an die jeweils noch verbleibenden Zylinder 2 und 3, 5 und 8 und 10 und 11 der Zylinderreihen 22,24,26 angeschlossen.The exhaust system is divided into two exhaust lines (see FIG. 1) 28, 30, one
Der Abgasstrang 28 setzt sich zusammen aus den an die Auslaßkanäle in den Zylinderköpfen der Brennkraftmaschine (soweit nicht beschrieben herkömmlicher Bauart) anschließenden Abgasleitungen 32,34,36,38,40,42, welche Abgasleitungen in einen Krümmerabschnitt 44 eines gemeinsamen Abgaskrümmers 46 münden. Von dem Krümmerabschnitt 44 zweigt auslaßseitig ein Abgasvorrohr 48 ab, in das in üblicher Weise eine nicht dargestellte Lambdasonde eingesetzt ist und das an einen Dreiwege-Katalysator 50 angeschlossen ist. Über den Dreiwege-Katalysator strömt das Abgas der weiteren Abgasanlage der Brennkraftmaschine zu, die herkömmlicher Bauart sein kann und deshalb nicht dargestellt ist.The
Der Abgasstrang 30 weist in gleicher Weise zwei Abgasleitungen 52,54 an der ersten Zylinderreihe 22, zwei Abgasleitungen 56,58 an der mittleren Zylinderreihe 24 und zwei Abgasleitungen 60,62 an der dritten Zylinderreihe 26 auf, die in den zweiten Krümmerabschnitt 64 des Abgaskrümmers 46 münden. Von diesem Krümmerabschnitt 64 geht ein zweites Abgasvorrohr 66 ab, daß mit einem zweiten Katalysator 68 verbunden ist.
Bei einer Zündfolge der W-12 Brennkraftmaschine von 1-8-9-3-6-11-4-5-12-2-7-10 sind die Abgasleitungen des einen Abgasstranges 28 an die Zylinder 1 und 4 der einen Zylinderreihe 22, an die Zylinder 6 und 7 der mittleren Zylinderreihe 24 und an die Zylinder 9 und 12 der dritten Zylinderreihe 26 angeschlossen, während die übrigen Zylinder an den zweiten Abgasstrang 30 wie vorbeschrieben angeschlossen sind.With an ignition sequence of the W-12 internal combustion engine from 1-8-9-3-6-11-4-5-12-2-7-10, the exhaust pipes of one
Wie die Fig. 2 zeigt, sind dabei die Abgasleitungen 36,38 bzw. 56,58 in einem Freiraum 70 angeordnet, der sich zwischen den beiden Zylinderreihen 22,24 bildet und der von einem Leitungsabschnitt 72 der nicht näher erläuterten Ansauganlage der Brennkraftmaschine überdeckt ist.As shown in FIG. 2, the
Die Abgasleitungen 32,34 bzw. 52,54 der linken äußeren Zylinderreihe 22 und die Abgasleitungen 40,42 bzw. 60,62 der rechten äußeren Zylinderreihe 26 liegen jeweils etwa senkrecht unterhalb deren Zylinderköpfe, wodurch sich eine hinsichtlich des Einbauraumes günstige Anordnung der Abgasleitungen ergibt.The
Diese Abgasleitungen münden - wie die Fig. 3. zeigt - wie vorbeschrieben in den jochförmigen Abgaskrümmer 46, der durch eine Trennwand 74 unterteilt zweiflutig ausgebildet ist und an der kraftabgebenden Stirnseite 76 der Brennkraftmaschine verlegt ist. An den zweiflutigen Abgaskrümmer 46 sind die Abgasvorrohre 48,66 der separaten Abgasstränge 28,30 angeschlossen.3. As shown in FIG. 3, these exhaust pipes lead into the yoke-
Wie insbesondere der Fig. 2 entnehmbar ist, sind die Abgasleitungen 32,34,36,38,40,42 sowie 52,54,56,58,60,62 mit einer Wärmeisolierung (zweischalig mit eingelegten Isoliermatten!) versehen. In gleicher Weise sind der Abgaskrümer 46 und die Abgasvorrohre 48,66 bis zu den Katalysatoren 50,68 isoliert.As can be seen in particular from FIG. 2, the
In nicht dargestellter Weise ist je Abgasvorrohr eine Lambdasonde vorgesehen, die der je sechs Zylinder vorgesehenen zweifachen Motorsteuerung in bekannter Weise regelungstechnisch aufgeschaltet ist.In a manner not shown, a lambda probe is provided for each exhaust gas pipe, which is connected to the dual engine control provided for six cylinders in a known manner in terms of control technology.
Claims (7)
- Exhaust system for a W-12 reciprocating-type internal combustion engine having three cylinder rows each with four cylinders, the exhaust ports of which are connected to two separate exhaust channels, in each of which is arranged a lambda sensor which is used for closed-loop control of an engine management system for controlling the fuel/air mixture, characterised in that two cylinders are connected to the separate exhaust channels (28, 30) for each cylinder row (22, 24, 26), and these cylinders are assigned to a duplex engine management system provided for a respective six cylinders.
- Exhaust system according to claim 1, characterised in that yoke-shaped elbow sections (44, 64) are arranged on an end face (76) of the internal combustion engine (2), and opening out into these elbow sections is the exhaust pipe for the combined cylinders and running from them is at least one respective front exhaust pipe section (48, 66).
- Exhaust system according to claims 1 and 2, characterised in that the two yoke-shaped elbow sections (44, 64) are united to form a dual-flow exhaust-gas elbow (46).
- Exhaust system according to claims 1 to 3, characterised in that in the case of a 1-8-9-3-6-11-4-5-12-2-7-10 firing order for the internal combustion engine, cylinders 1-4, 6-7 and 9-12 are joined to one elbow section (44) and the remaining cylinders to the other elbow section (64).
- Exhaust system according to one or more of claims 1 to 4, characterised in that the exhaust pipes (36, 38 and 56, 58, respectively) of the central cylinder row (24) are arranged inside the space (70) covered by an intake pipe section (72) and delimited by an outer cylinder row (22).
- Exhaust system according to one or more of the preceding claims, characterised in that the exhaust pipes (32, 34, 52, 54 and 40, 42, 60, 62) running from the exhaust ports of the outer cylinder rows (22, 26) extend beneath the corresponding cylinder heads, with the central cylinder row (24) arranged upright and the cylinder rows offset by 60°.
- Exhaust system according to one or more of the preceding claims, characterised in that at least the exhaust pipes and the yoke-shaped exhaust-gas elbow (46) are thermally insulated.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4335357A DE4335357A1 (en) | 1993-10-16 | 1993-10-16 | Exhaust system |
| DE4335357 | 1993-10-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0648921A1 EP0648921A1 (en) | 1995-04-19 |
| EP0648921B1 true EP0648921B1 (en) | 1997-03-05 |
Family
ID=6500341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP94116035A Expired - Lifetime EP0648921B1 (en) | 1993-10-16 | 1994-10-12 | Exhaust system |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5502964A (en) |
| EP (1) | EP0648921B1 (en) |
| JP (1) | JPH07158437A (en) |
| DE (2) | DE4335357A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007053125B4 (en) * | 2007-11-08 | 2019-10-02 | Bayerische Motoren Werke Aktiengesellschaft | Lambda probe arrangement for 8-cylinder internal combustion engines |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR395695A (en) * | 1908-10-26 | 1909-03-13 | Eugene Colombet | High periodicity internal combustion engine |
| GB128934A (en) * | 1915-06-01 | Alfred Brosseau Henri | Improvements in or relating to Internal Combustion Engines. | |
| DE504947C (en) * | 1928-06-13 | 1930-08-09 | Frederik Vilhelm Haugsted | Four-stroke internal combustion engine with exhaust manifolds |
| FR869064A (en) * | 1939-08-08 | 1942-01-23 | Collector tube for pulsating gas streams | |
| DE810554C (en) * | 1950-01-21 | 1951-08-13 | Maschf Augsburg Nuernberg Ag | Exhaust pipe |
| US2722923A (en) * | 1953-06-29 | 1955-11-08 | Paul R Morissette | Internal combustion engine |
| US3768248A (en) * | 1971-12-27 | 1973-10-30 | Caterpillar Tractor Co | Exhaust manifolding |
| SU533058A1 (en) * | 1973-01-18 | 1977-10-25 | Предприятие П/Я М-5536 | Exhaust manifold of double-stroke internal combustion engine |
| JPH02271025A (en) * | 1989-04-10 | 1990-11-06 | Mazda Motor Corp | Exhaust structure of multicylinder engine |
| JPH02283851A (en) * | 1989-04-25 | 1990-11-21 | Mazda Motor Corp | Suction structure for multicylinder engine |
| JPH0396635A (en) * | 1989-09-08 | 1991-04-22 | Mazda Motor Corp | Control device |
| JPH03124915A (en) * | 1989-10-09 | 1991-05-28 | Mazda Motor Corp | Intake device of engine |
| JPH03138421A (en) * | 1989-10-23 | 1991-06-12 | Mazda Motor Corp | Intake device of engine |
| AU660150B2 (en) * | 1990-08-13 | 1995-06-15 | Flowmaster, Inc. | Header assembly for internal combustion engine and method |
-
1993
- 1993-10-16 DE DE4335357A patent/DE4335357A1/en not_active Withdrawn
-
1994
- 1994-10-12 EP EP94116035A patent/EP0648921B1/en not_active Expired - Lifetime
- 1994-10-12 DE DE59401920T patent/DE59401920D1/en not_active Expired - Fee Related
- 1994-10-14 JP JP6248967A patent/JPH07158437A/en not_active Withdrawn
- 1994-10-14 US US08/323,049 patent/US5502964A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| EP0648921A1 (en) | 1995-04-19 |
| US5502964A (en) | 1996-04-02 |
| DE4335357A1 (en) | 1995-04-20 |
| JPH07158437A (en) | 1995-06-20 |
| DE59401920D1 (en) | 1997-04-10 |
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