EP0637679A1 - Zweitaktbrennkraftsmaschine - Google Patents

Zweitaktbrennkraftsmaschine Download PDF

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Publication number
EP0637679A1
EP0637679A1 EP94110468A EP94110468A EP0637679A1 EP 0637679 A1 EP0637679 A1 EP 0637679A1 EP 94110468 A EP94110468 A EP 94110468A EP 94110468 A EP94110468 A EP 94110468A EP 0637679 A1 EP0637679 A1 EP 0637679A1
Authority
EP
European Patent Office
Prior art keywords
exhaust
internal combustion
combustion engine
cycle internal
cylinder
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Withdrawn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
EP94110468A
Other languages
English (en)
French (fr)
Inventor
Christian Demazure
Denis Garro
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Renault SAS
Regie Nationale des Usines Renault
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
Renault SAS
Regie Nationale des Usines Renault
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 Automobiles Peugeot SA, Automobiles Citroen SA, Renault SAS, Regie Nationale des Usines Renault filed Critical Automobiles Peugeot SA
Publication of EP0637679A1 publication Critical patent/EP0637679A1/de
Withdrawn legal-status Critical Current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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • F02B33/02—Engines with reciprocating-piston pumps; Engines with crankcase pumps
    • F02B33/04—Engines with reciprocating-piston pumps; Engines with crankcase pumps with simple crankcase pumps, i.e. with the rear face of a non-stepped working piston acting as sole pumping member in co-operation with the crankcase
    • 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
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two

Definitions

  • the present invention relates to a two-cycle cycle internal combustion engine intended in particular to equip a motor vehicle. It relates more particularly to an exhaust system making it possible to adapt the characteristics of the exhaust circuit of a two-stroke engine according to the values taken by one or more operating parameters representative of the operation of the engine.
  • the exhaust device comprises in combination: a first pipe connecting a first exhaust light to a catalytic converter, a second pipe connecting a second exhaust light to the catalytic converter.
  • This second pipe cooperating with a bypass pipe of the catalytic converter and with a piloted distribution member positioned at the junction of the second pipe with the bypass pipe, this distribution member being adapted to selectively distribute the exhaust gases through or outside the catalytic converter.
  • the first pipe may also include a periodic closure member making it possible to selectively open the passage to the exhaust gases.
  • the object of the present invention is therefore to propose an exhaust system of particularly simple design and which makes it possible to adapt the characteristics of the exhaust circuit of a two-stroke engine over a very wide operating range of the latter.
  • the present invention therefore aims to reduce pollution of two-stroke engines beyond the most stringent standards and this in a particularly simple and economical manner.
  • the invention relates to an internal combustion engine with two-cycle cycle of the pump housing type comprising a housing in which is arranged at least one cylinder defining a combustion chamber, this cylinder having at least one intake lumen by where the fresh gases and at least one exhaust port penetrate through which the burnt gases are discharged, the exhaust light communicating with an exhaust line by means of two separate exhaust ducts.
  • the two-cycle cycle internal combustion engine is characterized in that the exhaust ducts cooperate with distributor means controlled from the values taken by one or more parameters representative of the operation of the engine, the distributor means being able to selectively direct the burnt gases to one or the other of the two exhaust ducts.
  • the exhaust port cooperates with shutter means controlled from values taken by one or more parameters representative of the operation of the engine, the shutter means being suitable selectively modifying the passage section of the exhaust lumen in the axial direction of the cylinder.
  • At least one of the two conduits cooperates with shutter means controlled from values taken by one or more parameters representative of the operation of the engine, these shutter means being able to selectively restrict the passage section of the duct.
  • the distributor means and the various shutter means consist of a single rotary plug driven in rotation by corresponding control means.
  • the parameters representative of the operation of the engine are the load and / or the speed and / or the temperature of the exhaust gases.
  • At least one of the two exhaust ducts cooperates with means for treating the exhaust gases.
  • the means for treating the exhaust gases consist of a priming catalyst.
  • the two exhaust ducts have different acoustic characteristics.
  • the two-stroke cycle internal combustion engine is of the pump housing type. It conventionally comprises a casing 2 in which is arranged at least one cylinder 3 defining a combustion chamber. Inside the cylinder 3 is slidably mounted a piston 5 connected by a connecting rod to a crankshaft.
  • the fuel injection is preferably direct and the ignition is obtained by a conventional means: electrical system with spark plug 6.
  • the combustion air supply to the combustion chamber is carried out through at least one opening or intake port 4, while the discharge of the burnt gases is carried out through at least one port 7. These orifices are opened in time appropriate by the back and forth of the piston 5 in the cylinder 3.
  • the exhaust port 7 communicates with the exhaust line via two separate exhaust conduits 8, 9.
  • the transfer of the burnt gases from the exhaust port 7 into the conduits is provided in accordance with the invention by means of a rotary plug 10 driven in rotation by non-illustrated control means controlled from the values taken by one or more parameters representative of the operation of the engine such as the load and / or the rotation speed and / or the exhaust gas temperature.
  • the plug 10 journals inside a corresponding bore 11 arranged in the casing 2, the bore 11 which extends perpendicular to the axis of the cylinder 3, communicates directly with the exhaust port 7 and with each of the two exhaust pipes 8.9.
  • This plug the object of which is to form dispensing means but also shutter means intended to restrict the passage section of the burnt gases as detailed below, is formed by a substantially cylindrical part in which is formed a transverse passage adapted. The shape of the passage results from the respective position of the conduits 8, 9 and the exhaust port 7, as well as their dimensions.
  • conduits 8 and 9 are extended outside the casing 2 by an exhaust manifold 14, the conduit 9 opening into a priming catalytic converter 12.
  • the plug 10 is positioned so that its passage communicates the exhaust port 7 and the only conduit 8. This arrangement allows maximum permeability for the escape of the burnt gases (indicated by the arrows) out of the combustion chamber 3, necessary for operation at full load and high speeds.
  • the plug 10 can still be positioned so that its passage puts in communication the exhaust light 7 and the only conduit 9. This arrangement makes it possible in particular to pass, in particular during cold starts of the engine, the exhaust gases through a priming catalyst 12 allowing the treatment of the exhaust gases. exhaust while the catalyst further downstream on the exhaust line is not yet operational.
EP94110468A 1993-07-06 1994-07-05 Zweitaktbrennkraftsmaschine Withdrawn EP0637679A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9308251A FR2707343B1 (fr) 1993-07-06 1993-07-06 Moteur à combustion interne à cycle deux temps.
FR9308251 1993-07-06

Publications (1)

Publication Number Publication Date
EP0637679A1 true EP0637679A1 (de) 1995-02-08

Family

ID=9448948

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94110468A Withdrawn EP0637679A1 (de) 1993-07-06 1994-07-05 Zweitaktbrennkraftsmaschine

Country Status (2)

Country Link
EP (1) EP0637679A1 (de)
FR (1) FR2707343B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004031617A1 (de) * 2004-06-30 2006-01-26 Bayerische Motoren Werke Ag Umschaltschieber

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2103524C1 (ru) * 1996-07-11 1998-01-27 Геня Те Способ работы двухтактного двигателя и двухтактный двигатель внутреннего сгорания
US6158215A (en) * 1998-11-12 2000-12-12 Polaris Industries Inc. Varible exhaust resonance chamber valve system for two-cycle engines
EP3486449B1 (de) 2016-01-31 2021-12-08 BRP-Rotax GmbH & Co. KG Verfahren zur reinigung eines abgasventils eines zweitaktverbrennungsmotors

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4202297A (en) * 1977-06-22 1980-05-13 Yamaha Hatsudoki Kabushiki Kaisha Two-stroke engine having variable exhaust port timing
JPS59218331A (ja) * 1983-05-27 1984-12-08 Yamaha Motor Co Ltd ２サイクルエンジンの排気装置
FR2552161A1 (fr) * 1983-09-19 1985-03-22 Suzuki Motor Co Moteur a deux temps
FR2589519A1 (fr) * 1985-10-31 1987-05-07 Renault Bernard Soupape rotative d'echappement a fermeture rapide
EP0278191A1 (de) * 1986-12-19 1988-08-17 Institut Français du Pétrole Vorrichtung und Verfahren zum schnellen Erregen eines Oxydationskatalysators für einen Zweitaktmotor
WO1989003929A1 (en) * 1987-10-26 1989-05-05 Orbital Engine Company Pty. Limited Exhaust gas treatment for a two stroke engine
EP0396262A2 (de) * 1989-05-05 1990-11-07 General Motors Corporation Zweitaktmotor mit Abgasentgiftungsanlage
JPH0378528A (ja) * 1989-08-18 1991-04-03 Nissan Motor Co Ltd ２ストローク内燃機関

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2688540B1 (fr) * 1992-03-10 1995-07-21 Inst Francais Du Petrole Ligne d'echappement avec catalyseur pour moteurs a combustion interne a deux temps et procede de traitement de gaz d'echappement comportant une telle ligne.

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4202297A (en) * 1977-06-22 1980-05-13 Yamaha Hatsudoki Kabushiki Kaisha Two-stroke engine having variable exhaust port timing
JPS59218331A (ja) * 1983-05-27 1984-12-08 Yamaha Motor Co Ltd ２サイクルエンジンの排気装置
FR2552161A1 (fr) * 1983-09-19 1985-03-22 Suzuki Motor Co Moteur a deux temps
FR2589519A1 (fr) * 1985-10-31 1987-05-07 Renault Bernard Soupape rotative d'echappement a fermeture rapide
EP0278191A1 (de) * 1986-12-19 1988-08-17 Institut Français du Pétrole Vorrichtung und Verfahren zum schnellen Erregen eines Oxydationskatalysators für einen Zweitaktmotor
WO1989003929A1 (en) * 1987-10-26 1989-05-05 Orbital Engine Company Pty. Limited Exhaust gas treatment for a two stroke engine
EP0396262A2 (de) * 1989-05-05 1990-11-07 General Motors Corporation Zweitaktmotor mit Abgasentgiftungsanlage
JPH0378528A (ja) * 1989-08-18 1991-04-03 Nissan Motor Co Ltd ２ストローク内燃機関

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 15, no. 244 (M - 1127) 24 June 1991 (1991-06-24) *
PATENT ABSTRACTS OF JAPAN vol. 9, no. 92 (M - 373)<1815> 20 April 1985 (1985-04-20) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004031617A1 (de) * 2004-06-30 2006-01-26 Bayerische Motoren Werke Ag Umschaltschieber

Also Published As

Publication number Publication date
FR2707343A1 (fr) 1995-01-13
FR2707343B1 (fr) 1995-08-25

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