FR2621955A1 - Variable-length exhaust for a two-stroke internal combustion engine - Google Patents

Variable-length exhaust for a two-stroke internal combustion engine Download PDF

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Publication number
FR2621955A1
FR2621955A1 FR8714573A FR8714573A FR2621955A1 FR 2621955 A1 FR2621955 A1 FR 2621955A1 FR 8714573 A FR8714573 A FR 8714573A FR 8714573 A FR8714573 A FR 8714573A FR 2621955 A1 FR2621955 A1 FR 2621955A1
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France
Prior art keywords
exhaust
bore
variable
combustion engine
internal combustion
Prior art date
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Granted
Application number
FR8714573A
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French (fr)
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FR2621955B1 (en
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Individual
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Individual
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Priority to FR8714573A priority Critical patent/FR2621955B1/en
Publication of FR2621955A1 publication Critical patent/FR2621955A1/en
Application granted granted Critical
Publication of FR2621955B1 publication Critical patent/FR2621955B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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 ; 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
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1811—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration
    • F01N13/1822—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration for fixing exhaust pipes or devices to vehicle body
    • 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
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
    • F01N1/166—Silencing apparatus characterised by method of silencing by using movable parts for changing gas flow path through the silencer or for adjusting the dimensions of a chamber or a pipe
    • 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
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1811—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body with means permitting relative movement, e.g. compensation of thermal expansion or vibration
    • 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
    • F02B27/00—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues
    • F02B27/04—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues in exhaust systems only, e.g. for sucking-off combustion gases
    • F02B27/06—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues in exhaust systems only, e.g. for sucking-off combustion gases the systems having variable, i.e. adjustable, cross-sectional areas, chambers of variable volume, or like variable means
    • 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
    • F01N2470/00—Structure or shape of gas passages, pipes or tubes
    • F01N2470/24—Concentric tubes or tubes being concentric to housing, e.g. telescopically assembled
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Characterised By The Charging Evacuation (AREA)
  • Exhaust Silencers (AREA)

Abstract

Device allowing a variable exhaust length. This principle is characterised by a bore 4 in which slides a sphere 1 equipped with a sealing ring 2. This device allows the curve 3 to penetrate into the bore 4 and this being with the curve 3 misaligned with respect to the bore 4 by several degrees.

Description

ECHAPPEMEtE A LONGUEUR VARIABLE
La pressente invention conterne un dispositif permettant de faire varier la longueur d'un système d'échappement.VARIABLE LENGTH EXHAUST
The present invention relates to a device making it possible to vary the length of an exhaust system.

Sur le moteur deux-temps,on utilise le principe du résonateur qui véhicule des ondes de pressions et de dépressions.Sur les échappements traditionnels,la longueur du système est fixe, par conséquent, l'échappement est accordé pour un régime donné. On the two-stroke engine, we use the principle of the resonator which carries waves of pressures and depressions. On traditional exhausts, the length of the system is fixed, therefore, the exhaust is tuned for a given speed.

Le dispositif, selon l'invention, permet de modifier cet inconvénient et d'y remédier.The device according to the invention makes it possible to modify this drawback and to remedy it.

Il comporte un alésage à l'entrée du résonateur et une boule alésée équipée d'un ségment d'étanchéité, se trouv > rà l'extremité du cintre.Celui-ci pénètre dans l'alésage prévu à cet effet; quant au sègment,il assure l'étanchéité du système.Le fait que ce sègment soit placé sur unes!hèrv lui permet d'être désaxé de cinq à six degrés,tout er conservant son efficacité.It has a bore at the entrance to the resonator and a bored ball fitted with a sealing segment, is> r at the end of the hanger. This enters the bore provided for this purpose; As for the segment, it seals the system. The fact that this segment is placed on one! hèrv allows it to be offset from five to six degrees, while retaining its effectiveness.

A bas et moyens régimes, le système du repos permet une longueur d'échappement importante.L'accord échappement-diagrammes s'effectue à un faible régime de rotation. At low and medium speeds, the rest system allows a long exhaust length. The exhaust-diagrams agreement is made at a low rotation speed.

Le régime de rotation augmentant,la longueur d'échappement diminue; l'accord échappement-diagrammes s'effectue alors à des régimes de rotation de plu en plus élevés.Ce dispositif permet un accord échappement-diagrammes sur une plus grande plage de régime de rptation, et confère au moteur plus de spuplessq,et unepuissance accrue.As the rotation speed increases, the exhaust length decreases; the exhaust-diagrams tuning is then carried out at higher and higher rotation speeds. This device allows exhaust-diagrams tuning over a larger range of rpm, and gives the engine more spuplessq, and increased power. .

La variation de la longueur peut être assurée soit par la remontée du moteur, sur les cyclomoteurs équipés d'un variateur,soit mécaniquement sur les autres types de véhicules. The length can be varied either by raising the engine, on mopeds fitted with a variator, or mechanically on other types of vehicles.

La figure 1 représente le dispositif monté sur un échappement.La figure 2 représente en coupe le dispositif selon l'invention.Le dispositif représenté sur la figure numéro 2 comporte une sphère alésée (1),; celle-cicomprend une gorge dans laquelle vient se placer un sègment (2).Cet ensemble est solidaire du cintre (3) et coulisse dans l'alésage (4),l'étanchéité étant assurée par le sègment.  Figure 1 shows the device mounted on an exhaust. Figure 2 shows in section the device according to the invention. The device shown in figure number 2 comprises a bored sphere (1); this includes a groove in which a segment (2) is placed. This assembly is integral with the hanger (3) and slides in the bore (4), the seal being ensured by the segment.

Claims (1)

REVENDICATION CLAIM Dispositif permettant une longueur d'échappement variable.Ce principe est caracterisé par un alésage (4) dans lequel vient coulisser une sphère (I),équipée d'un sègment (2).Ce dispositif permet au cintre (3j de pénètrer dans l'alésage (4) e ceci avec un défaut d'alignement du cintre (3) par rapport à l'alésage (4) de plusieurs degrés.  Device allowing a variable exhaust length. This principle is characterized by a bore (4) in which a sphere (I) slides, equipped with a segment (2). This device allows the hanger (3d to penetrate into the bore (4) e this with a misalignment of the hanger (3) relative to the bore (4) of several degrees.
FR8714573A 1987-10-19 1987-10-19 VARIABLE LENGTH EXHAUST FOR TWO-STROKE INTERNAL COMBUSTION ENGINE Expired - Lifetime FR2621955B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8714573A FR2621955B1 (en) 1987-10-19 1987-10-19 VARIABLE LENGTH EXHAUST FOR TWO-STROKE INTERNAL COMBUSTION ENGINE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8714573A FR2621955B1 (en) 1987-10-19 1987-10-19 VARIABLE LENGTH EXHAUST FOR TWO-STROKE INTERNAL COMBUSTION ENGINE

Publications (2)

Publication Number Publication Date
FR2621955A1 true FR2621955A1 (en) 1989-04-21
FR2621955B1 FR2621955B1 (en) 1991-01-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR8714573A Expired - Lifetime FR2621955B1 (en) 1987-10-19 1987-10-19 VARIABLE LENGTH EXHAUST FOR TWO-STROKE INTERNAL COMBUSTION ENGINE

Country Status (1)

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FR (1) FR2621955B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991007575A1 (en) * 1989-11-15 1991-05-30 Ford Motor Company Limited Exhaust system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1038301A (en) * 1951-06-11 1953-09-28 Daimler Benz Ag Exhaust system for internal combustion engines, in particular for motor car engines
DE1005319B (en) * 1952-11-03 1957-03-28 Kloeckner Humboldt Deutz Ag Pipe joint connection for exhaust and intake lines of internal combustion engines
GB1136698A (en) * 1967-07-25 1968-12-11 Pickup & Sons Thermosel Produc A pipe joint
US3726092A (en) * 1971-03-29 1973-04-10 R Raczuk Variable exhaust system for combustion engine
FR2419393A1 (en) * 1978-03-10 1979-10-05 Westaflex France Flexible exhaust pipe for vehicle engine - has sliding end ferrule with sealing cord inside intermediate ferrule
DE3241750A1 (en) * 1982-11-11 1984-05-17 Iveco Magirus AG, 7900 Ulm Pipe joint and its production method, especially for exhaust pipes

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1038301A (en) * 1951-06-11 1953-09-28 Daimler Benz Ag Exhaust system for internal combustion engines, in particular for motor car engines
DE1005319B (en) * 1952-11-03 1957-03-28 Kloeckner Humboldt Deutz Ag Pipe joint connection for exhaust and intake lines of internal combustion engines
GB1136698A (en) * 1967-07-25 1968-12-11 Pickup & Sons Thermosel Produc A pipe joint
US3726092A (en) * 1971-03-29 1973-04-10 R Raczuk Variable exhaust system for combustion engine
FR2419393A1 (en) * 1978-03-10 1979-10-05 Westaflex France Flexible exhaust pipe for vehicle engine - has sliding end ferrule with sealing cord inside intermediate ferrule
DE3241750A1 (en) * 1982-11-11 1984-05-17 Iveco Magirus AG, 7900 Ulm Pipe joint and its production method, especially for exhaust pipes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991007575A1 (en) * 1989-11-15 1991-05-30 Ford Motor Company Limited Exhaust system

Also Published As

Publication number Publication date
FR2621955B1 (en) 1991-01-18

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