EP0094872B1 - Zweitaktbrennkraftmaschine mit Direkteinspritzung - Google Patents

Zweitaktbrennkraftmaschine mit Direkteinspritzung Download PDF

Info

Publication number
EP0094872B1
EP0094872B1 EP19830400944 EP83400944A EP0094872B1 EP 0094872 B1 EP0094872 B1 EP 0094872B1 EP 19830400944 EP19830400944 EP 19830400944 EP 83400944 A EP83400944 A EP 83400944A EP 0094872 B1 EP0094872 B1 EP 0094872B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
ducts
engine according
casing
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
Application number
EP19830400944
Other languages
English (en)
French (fr)
Other versions
EP0094872A1 (de
Inventor
Armand Castarede
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.)
Regie Nationale des Usines Renault
Original Assignee
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 Regie Nationale des Usines Renault filed Critical Regie Nationale des Usines Renault
Publication of EP0094872A1 publication Critical patent/EP0094872A1/de
Application granted granted Critical
Publication of EP0094872B1 publication Critical patent/EP0094872B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0021—Construction
    • F02F7/0036—Casings for two-stroke engines with scavenging conduits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/18—Other cylinders
    • F02F1/22—Other cylinders characterised by having ports in cylinder wall for scavenging or charging
    • 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 internal combustion engines operating according to the two-stroke cycle and with direct fuel injection, of the type whose crankcase-cylinder comprises at least one cylinder into which open air intake channels controlled by the piston. associated.
  • the realization of the channels by coring does not make it possible to directly obtain from the foundry surface states compatible with good engine performance and therefore requires delicate machining operations which, on the one hand, limit the shape of the profile. longitudinal and of the section of the channels and, on the other hand, are generally impassable when the channels have come from the foundry in the cylinder block.
  • the present invention aims to resolve this difficulty at the lowest cost. To this end, it relates to an engine of the aforementioned type with two half-casings, characterized in that these half-casings define an air cover surrounding the cylinder on at least part of its periphery, on the one hand, and these crankcases are obtained rough foundry by die casting, on the other hand.
  • the two-stroke engine shown is of the single-cylinder type, with compression ignition and direct injection of fuel into the combustion chamber, the injection system not having been shown for clarity of the drawing.
  • This engine comprises a cylinder block 1 surmounted by a cylinder head 2 in which is housed an exhaust valve 3.
  • a piston 5 articulated on a connecting rod 6 for driving a crankshaft (not shown ).
  • the piston 5 masks and discovers air intake channels 7 which make the cylinder 4 communicate with an air cover 8 surrounding the cylinder 4 and in which, in operation, a compressor (not shown ) expels air admitted through an inlet pipe 9.
  • the cylinder 4 is delimited by a thin jacket 10 compressed over a small height and defining, with the cylinder block 1 and the cylinder head 2, a chamber of cooling water 11.
  • the jacket 10 has, at the right of the channels 7, large openings 12 which each uncover the openings of several of the channels 7 and can thus be easily obtained by machining.
  • the cylinder block 1 consists of two half-casings, namely an upper half-casing 1A and a lower half-casing 1 1 B, the assembly plane (line 2-2 of FIG. 1 and line AA in Fig. 3) is perpendicular to the axis of the cylinder 4 and passes through the intake channels 7.
  • the two half-casings are assembled by four long tie rods 13 which pass through the bosses 14 of the half-casings 1 A and 1 B and are screwed at one of their ends into the cylinder head 2.
  • the tie rods 13 thus put the half-casings in compression over their entire height and avoid work in alternating traction of the least resistant parts of the casing 1 .
  • the execution of the cylinder block 1 in two half-casings makes it possible to produce the latter by die-casting and thus obtain, raw foundry and according to the best geometry, the air intake channels 7. It is as well as these channels can offer the largest possible section in the space allotted to them, for example by virtue of a rectangular shape in section, as shown in FIG. 3, preferably in a circular shape which, alone, could be obtained by machining in a thick jacket.
  • These channels, considered in the assembly plane can be oriented angularly, for example substantially tangentially to a circle C concentric with the axis of the cylinder 4, as shown in FIG. 2, to generate the vortex promoting efficient scanning of the cylinder.
  • these channels can, in the same plane, present a shape ensuring the best coefficient of flow, for example by means of a leave 7A (fig. 2) defining a flared inlet avoiding the separation of the air streams from the walls of the channels, air cover side 8.
  • these channels can have the desired length necessary for the establishment of air streams opening into the cylinder according to a speed and a direction capable of generating the vortex.
  • the material used for the two half-casings 1 A and 1 B will be an aluminum alloy which, cast under pressure, will make it possible to obtain without retouching the most varied shapes for the channels but, of course, the invention is not limited to the use of this type of material.
  • the two half-casings 1A and 1B once assembled, together form the air cover 8 in which the compressor delivers.
  • This can interest the entire periphery of the engine, as in the example shown, or only part of it, and does not require any cover and gasket. Sealing does not pose any particular problem, since the cooling chamber 11 is limited to the upper half-casing 1 A so as not to affect the assembly plane of the two half-casings and where the chamber of combustion is delimited between the upper half-casing 1 A, the piston 5 and the cylinder head 2, no joint is necessary between the two half-casings.
  • the invention is not limited to the embodiment described above.
  • a pressurized oil chamber can be fitted in the lower half-casing 1 B.
  • This also offers possibilities for appropriate lubrication of the jacket, piston and segments.
  • the invention can be applied to different modes of construction of two-stroke engines, whether they are with one or more cylinders, filled by pump housing or by compressor, with exhaust by lights or by valves. In all cases, the traditional lights being replaced by channels whose arrangement is without constraint, their shape, their section, their length, their number are no longer a function of machining possibilities and no longer hamper the designer in the search for the best flow.
  • the invention makes it possible to obtain industrially at the lowest cost all the scanning effects sought to improve the filling and therefore the efficiency of the motors.
  • it facilitates the obtaining of compact motors, mainly in the case where the sweeping is provided by a compressor delivering in an air tank.

Claims (8)

1. Zweitaktbrennkraftmaschine mit Direkteinspritzung des Brennstoffes, deren Zylindergehäuse wenigstens einen Zylinder (4) aufweist, in dem von zugehörigen Kolben gesteuerte Lufteinlasskanäle (7) münden und die wenigstens zwei Gehäusehälften (1 A-1 B) aufweist, die entlang einer zur Achse des Zylinders (4) senkrechten Ebene zusammengebaut sind, welche die Kanäle durchsetzt, die entlang Ebenen ausgerichtet sind, die parallel zur Achse des Zylinders (4) liegen, dadurch gekennzeichnet, dass die beiden Gehäusehälften (1 A-1 B) einerseits einen Luftraum (8) begrenzen, der den Zylinder (4) an wenigstens einem Teil seines Umfangs umgibt und dass andererseits die beiden Gehäusehälften (1A-1 B) als Rohlinge durch einen Druckgussvorgang hergestellt sind.
2. Motor nach Anspruch 1, dadurch gekennzeichnet, dass die Kanäle (7) im wesentlichen tangential zu einem zur Achse des Zylinders (4) konzentrischen Kreis (C) ausgerichtet sind.
3. Motor nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, dass, in der Zusammenbauebene betrachtet. die Lufteintrittsseiten der Kanäle (7) eine Kehlung (7A) aufweisen, die einen bauchigen Eingang bilden.
4. Motor nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Querschnitt der Kanäle (7) eine rechtwinklige Form aufweist.
5. Motor nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass er eine dünne Hülle (10) aufweist, die an den Stellen der Kanäle (7) mit Öffnungen (12) versehen ist, deren jede die Öffnungen mehrere Kanäle freigibt.
6. Motornach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass eine Kühlwasserkammer (11) in der oberen Gehäusehälfte (1A) vorgesehen ist.
7. Motor nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die beiden Gehäusehälften (1A-1B) ohne Zwischenschaltung einer Dichtung zusammengebaut sind.
8. Motor nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass die beiden Gehäusehälften (1A-1B) mittels Spannbolzen (13) unter Druck zusammengebaut sind die sie durchsetzen und in den Zylinderkopf (2) des Motors verankert sind.
EP19830400944 1982-05-13 1983-05-10 Zweitaktbrennkraftmaschine mit Direkteinspritzung Expired EP0094872B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8208339A FR2526871B1 (fr) 1982-05-13 1982-05-13 Moteur a combustion interne a deux temps et a injection directe
FR8208339 1982-05-13

Publications (2)

Publication Number Publication Date
EP0094872A1 EP0094872A1 (de) 1983-11-23
EP0094872B1 true EP0094872B1 (de) 1986-02-19

Family

ID=9273999

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830400944 Expired EP0094872B1 (de) 1982-05-13 1983-05-10 Zweitaktbrennkraftmaschine mit Direkteinspritzung

Country Status (4)

Country Link
EP (1) EP0094872B1 (de)
DE (1) DE3362160D1 (de)
ES (1) ES522314A0 (de)
FR (1) FR2526871B1 (de)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE460884C (de) * 1927-06-11 1928-06-09 Maschf Augsburg Nuernberg Ag Zylinder fuer Zweitaktbrennkraftmaschinen
DE625796C (de) * 1934-03-24 1936-02-15 Buckau R Wolf Akt Ges Maschf Zylinderblock fuer mehrzylindrige Zweitaktbrennkraftmaschinen
DE759359C (de) * 1941-02-23 1954-10-11 Kloeckner Humboldt Deutz Ag Zylinder fuer Zweitaktbrennkraftmaschinen
US3411289A (en) * 1967-03-21 1968-11-19 Fairbanks Morse Inc Turbocharged opposed piston engine having improved air charging and scavenging
FR2183394A5 (de) * 1972-05-05 1973-12-14 Peugeot & Renault
FR2360757A1 (fr) * 1976-08-02 1978-03-03 Renault Structure de moteur a combustion interne

Also Published As

Publication number Publication date
FR2526871A1 (fr) 1983-11-18
FR2526871B1 (fr) 1985-06-21
ES8402907A1 (es) 1984-02-16
EP0094872A1 (de) 1983-11-23
ES522314A0 (es) 1984-02-16
DE3362160D1 (en) 1986-03-27

Similar Documents

Publication Publication Date Title
FR2707349A1 (fr) Moteur à combustion interne à deux temps.
EP0584350B1 (de) Abgasleitung für eine zweitakt-brennkraftmaschine
EP0351420B1 (de) Brennkraftmaschine mit kompressionszündung und veränderlichem volumen
FR2501289A1 (fr) Moteur a combustion interne a dispositif de transfert en boucle moulable sous pression
EP0094872B1 (de) Zweitaktbrennkraftmaschine mit Direkteinspritzung
FR2658240A1 (fr) Perfectionnements aux moteurs a combustion interne a deux temps, a allumage par compression de type diesel.
FR2540181A1 (fr) Moteur deux temps a soupapes avec suralimentation par pistons opposes dans le meme cylindre
EP0517887A1 (de) Zweitaktbrennkraftmaschine mit verzögerter spülung des zylinders
EP0754268B1 (de) Zweitakt dieselbrennkraftmaschine mit einem spiralförmigen luftanzugskanal
EP2206896B1 (de) Kühlungsvorrichtung eines im Zylinderkopf integrierten Abgaskrümmers
FR2579669A1 (fr) Moteur a combustion interne a pistons alternatifs
FR2573483A1 (fr) Moteur a combustion interne a quatre temps
FR2849108A1 (fr) Moteur a combustion interne comportant des moyens pour faire varier l'intensite du swirl
FR2639676A1 (fr) Moteur a combustion deux temps avec rotor multicylindres en etoile
FR2583108A2 (fr) Procede d'amelioration du fonctionnement d'un moteur a combustion interne, a cycle court, et moteur a combustion interne a fonctionnement ameliore a cycle court et a structure simplifiee
WO1986000374A1 (fr) Procede d'amelioration du fonctionnement d'un moteur a combustion interne a deux temps
FR2545157A1 (fr) Perfectionnement aux pistons utilises notamment dans les moteurs a deux temps
FR2465076A1 (fr) Dispositif de compresseur pour l'alimentation des moteurs a combustion interne et autres
BE839086A (fr) Moteur a combustion interne avec chambre d'explosion unique pour plusieurs pistons
FR2763647A1 (fr) Moteur a combustion interne a allumage commande
FR2886682A3 (fr) Chambre de combustion d'un moteur diesel
BE464085A (de)
FR2507249A1 (fr) Moteur a combustion interne suralimente
FR2750474A1 (fr) Carter cylindres pour moteur a combustion interne
FR2531139A1 (fr) Dispositif de controle d'un circuit de gaz d'une chambre de combustion

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19830613

AK Designated contracting states

Designated state(s): DE GB IT NL SE

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE GB IT NL SE

ITF It: translation for a ep patent filed

Owner name: JACOBACCI & PERANI S.P.A.

REF Corresponds to:

Ref document number: 3362160

Country of ref document: DE

Date of ref document: 19860327

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19910315

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19910419

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19910425

Year of fee payment: 9

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19910531

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19920510

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19920511

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19921201

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19920510

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19930202

EUG Se: european patent has lapsed

Ref document number: 83400944.1

Effective date: 19921204