EP0210976B1 - Moteur à combustion interne monocylindrique avec balayage du carter du vilebrequin - Google Patents

Moteur à combustion interne monocylindrique avec balayage du carter du vilebrequin Download PDF

Info

Publication number
EP0210976B1
EP0210976B1 EP19860890187 EP86890187A EP0210976B1 EP 0210976 B1 EP0210976 B1 EP 0210976B1 EP 19860890187 EP19860890187 EP 19860890187 EP 86890187 A EP86890187 A EP 86890187A EP 0210976 B1 EP0210976 B1 EP 0210976B1
Authority
EP
European Patent Office
Prior art keywords
connecting rod
counterweight
combustion engine
piston
crankshaft
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
EP19860890187
Other languages
German (de)
English (en)
Other versions
EP0210976A2 (fr
EP0210976A3 (en
Inventor
Andreas Bilek
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.)
AVL List GmbH
Original Assignee
AVL Gesellschaft fuer Verbrennungskraftmaschinen und Messtechnik mbH
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 AVL Gesellschaft fuer Verbrennungskraftmaschinen und Messtechnik mbH filed Critical AVL Gesellschaft fuer Verbrennungskraftmaschinen und Messtechnik mbH
Publication of EP0210976A2 publication Critical patent/EP0210976A2/fr
Publication of EP0210976A3 publication Critical patent/EP0210976A3/de
Application granted granted Critical
Publication of EP0210976B1 publication Critical patent/EP0210976B1/fr
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
    • 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
    • F02B33/28—Component parts, details or accessories of crankcase pumps, not provided for in, or of interest apart from, subgroups F02B33/02 - F02B33/26
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M3/00—Lubrication specially adapted for engines with crankcase compression of fuel-air mixture or for other engines in which lubricant is contained in fuel, combustion air, or fuel-air mixture
    • F01M3/02—Lubrication specially adapted for engines with crankcase compression of fuel-air mixture or for other engines in which lubricant is contained in fuel, combustion air, or fuel-air mixture with variable proportion of lubricant to fuel, lubricant to air, or lubricant to fuel-air-mixture
    • 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
    • F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
    • 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 invention relates to a single-cylinder, two-stroke internal combustion engine with crankcase purging, with a crankcase enclosing the crank mechanism and counterweight with small gaps, and supporting the cylinder, and a piston guided in the cylinder and connected via a connecting rod to a crankshaft mounted in the crankcase, the piston controls flushing slots arranged in the cylinder wall, wherein the crankshaft is mounted on one side overhung and the only counterweight between the crankpin bearing of the connecting rod and the connecting rod-side crankshaft main bearing is arranged.
  • An internal combustion engine of the type mentioned at the outset has been used, for. B. known from DE-OS 3 108 519.
  • the end face of the piston facing the crankshaft is formed by a flat annular surface.
  • the length of the connecting rod is dimensioned such that in the extreme position of the connecting rod facing away from the cylinder head, a gap remains between the outer surface of the counterweight and the end face of the piston facing it.
  • the invention has for its object to further reduce the harmful space for the crankcase purge and thus to improve the performance of the internal combustion engine and its fuel consumption.
  • the piston skirt has recesses on the side of the counterweight that closely enclose the counterweight in the area of the lower piston dead center, and that the circumferential area of the cylinder liner that cooperates with the recesses in the piston skirt is free of flushing slots.
  • the counterweight is designed so that it enters the correspondingly arranged recesses of the piston skirt at the lower piston dead center. This reduces the harmful space by a volume that results from the piston diameter and the height of the recesses of the piston skirt.
  • the recesses in the piston skirt can essentially be pulled up to the eyes for the piston pin, which results in the best values with regard to the reduction of the harmful space in this construction.
  • a further improvement in terms of the task can be achieved in that the connecting rod has a shaft which is offset in the direction away from the main crankshaft bearing in relation to a plane lying perpendicular to the crankshaft axis and passing through the longitudinal centers of the bearings on the crank pin and on the piston pin that the counterweight or the crank has a recess concentric with the crank pin for the passage of the connecting rod in the region of the lower piston dead center.
  • the interaction of these two measures brings the connecting rod and counterweight closer together, which additionally reduces the harmful space in the direction of the crankshaft axis.
  • the connecting rod is made in one piece and in the region of its bearing on the crank pin essentially with an outer contour which is coaxial with the crank pin and approximately cylindrical.
  • the slot-controlled two-stroke internal combustion engine with fuel injection preferably a diesel engine
  • These housing parts are firmly and tightly connected to one another by means of a larger number of screws 7, which are screwed into the housing part 2 and penetrate the housing part 1.
  • the housing part 1 forms a space 8 which serves to hold fuel, the mirror 9 of which is regulated to a constant height by means not known per se, such as floats etc.
  • the space 8 is closed on the output side by the bearing plate 11 which is firmly connected to the housing part 1 by means of screws 10.
  • the crankshaft 12 is overhung in the housing part 1 and in the bearing plate 11 by means of ball bearings 13 and 14 (main bearing).
  • the counterweight 15 At the free end of the crankshaft 12 is the counterweight 15, which partially engages behind the ball bearing 13 with a bead 15 '.
  • the peripheral contours 16 of the counterweight 15 and the order Catching contours 17 and 18 of the bead 15 ' run concentrically to the crankshaft 3 and form gaps with the corresponding walls 19 and 20 of the housing part 1 when passing, which are kept as small as technically possible and feasible.
  • the counterweight 15 is connected to the crank pin 21, which is connected on one side to the crankshaft 12 via the crank 22.
  • the crank pin 21 is drive-connected to the piston 24 via the associated bearing 21 'by means of the one-piece connecting rod 23 via the piston pin 25, which is mounted on the piston 24 in eyes 30'.
  • the shaft 23 'of the connecting rod 23 is eccentric with respect to the piston or cylinder axis 26 and is offset in the direction away from the crankshaft bearing 13.
  • the outer contours 27 of the crank pin bearing eye 28 and the outer contour 29 of the piston pin bearing eye 30 of the connecting rod 23 are each designed axially to the bearing axes. Thanks to the flying crankshaft bearing, the undivided connecting rod 23 enables a circular connecting rod violin 23 "and thus the smallest possible crankcase dimensions.
  • the piston skirt 24 'of the piston 24 has recesses 31 on the side of the counterweight 15, into which the counterweight 15 enters with little play in the area of the bottom dead center position, see FIG. 3.
  • the counterweight 15 or the crank 22 has one towards the axis of the crank pin 21 concentric groove 32 into which the crank pin bearing eye 28 enters.
  • the piston 24 is slidably mounted in the cylinder liner 33, which in turn is formed in one piece with the cylinder head 35 provided with cooling fins 34.
  • This cylinder head-cylinder liner unit is clamped between the two housing parts 1 and 2, for which purpose the cylinder liner 33 is provided with a circumferential flange 36 '.
  • the parting line between the cylinder head 35 and the housing parts 1, 2 is designated 35 '.
  • the cylinder liner 33 has inlet slots 36 for the air compressed in the crank chamber 40 and outlet slots 37 for the combustion gases, both of which are controlled by the piston 24. In the area 33 'of the cylinder liner 33 there are no flushing slots because the piston skirt 24' has the recesses 31 in this area.
  • the inlet slots 36 are fed from a space 38, which in turn is in flow connection with the overflow channels 39 arranged at least in the housing part 2 in the region of the dividing plane 6 with the crank chamber 40.
  • This design of the overflow channels 39 also has the advantage, among other things, that they can be shaped and cast without a core.
  • the outlet slots 37 are in flow communication via an outlet duct 41 with the sound-absorbing exhaust device 42, which in turn is fastened to the housing part 1 by means of the screws 43 and has the outlet port 44.
  • a cooling fan 45 is provided which is fixedly connected to the crankshaft 12 by means of the central screw 46.
  • the cooling air is fed via a connecting line 47 to the cooling fins 34, for which purpose the latter have a casing which is formed partly by a shell part 48 and partly by the inner wall 49 of the fuel tank 50.
  • Fuel is supplied to the combustion chamber 51 arranged in the piston 24 via the nozzle 52, specifically via the injection line 53, which is connected to the injection pump 54, which is not shown in detail.
  • the cam 55 of the injection pump sits on the crankshaft 12 and is connected to it in a rotationally fixed manner.
  • the lubrication of the injection cam 55 takes place via an endless belt 56 made of flexible material, which is suspended from the crankshaft 12, is carried by it and is immersed under the fuel level 9.
  • the lubrication of the engine parts takes place via a device 57, which is not described in detail here and to which fuel is supplied via the angled line 58. This lubrication device is connected to the intake air flowing out via the air filter 59.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Claims (4)

1. Moteur à combustion interne monocylindrique à deux temps, avec balayage du carter du vilebrequin, avec un carter de vilebrequin portant le cylindre et entourant, avec des espaces intermédiaires réduits, le mécanisme du vilebrequin, y compris le poids antagoniste, et avec un piston guidé dans le cylindre et se trouvant en liaison, par l'intermédiaire d'une bielle avec un arbre de vilebrequin monté dans le carter de vilebrequin, ce piston commandant des lumières de balayage disposées dans la paroi du cylindre, l'arbre de vilebrequin étant monté d'un côté en porte à faux et le poids antagoniste unique étant disposé entre le palier de la bielle sur le tourillon du vilebrequin et le palier principal de l'arbre du vilebrequin côté bielle, moteur caractérisé en ce que la jupe (24') du piston comporte, du côté du poids antagoniste, des évidements (31) qui entourent étroitement ce poids antagoniste au voisinage du point mort inférieur du piston, tandis que la zone périphérique (33') de la chemise (33) du cylindre, coopérant avec les évidements de la jupe (24') du piston, est exempte de lumières de balayage (36, 37).
2. Moteur à combustion interne selon la revendication 1, caractérisé en ce que les évidements (31) dans la jupe (24') du piston, s'étendent pratiquement vers le haut jusqu'aux bossages (30) prévus pour l'axe (25) du piston.
3. Moteur à combustion interne selon la revendication 1 ou 2, caractérisé en ce que la bielle (23) comporte un fût (23') qui, par rapport à un plan (6) perpendiculaire à l'axe (3) de l'arbre du vilebrequin et passant par les milieux (4 ou bien 5) de la longueur des paliers sur le tourillon (21) du vilebrequin ainsi que sur l'axe (25) du piston, est décalée dans le sens qui l'éloigne des paliers (13, 14) de l'arbre du vilebrequin, tandis que le poids antagoniste (15), ou bien le vilebrequin (22), comporte un évidement (32) concentrique au tourillon (21) du vilebrequin pour permettre le passage de la bielle (23) au voisinage du point mort intérieur du piston.
4 Moteur à combustion interne selon une des revendications 1 à 3, caractérisé en ce que la bielle (23) est réalisée d'une seule pièce et comporte, dans la zone de son palier (21') sur le tourillon (21) du vilebrequin, un contour externe (27) à peu près cylindrique et en pratique co-axial au tourillon du vilebrequin.
EP19860890187 1985-07-25 1986-06-19 Moteur à combustion interne monocylindrique avec balayage du carter du vilebrequin Expired EP0210976B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT221485A AT395636B (de) 1985-07-25 1985-07-25 Einzylinder-zweitakt-brennkraftmaschine mit kurbelkastenspuelung
AT2214/85 1985-07-25

Publications (3)

Publication Number Publication Date
EP0210976A2 EP0210976A2 (fr) 1987-02-04
EP0210976A3 EP0210976A3 (en) 1988-03-02
EP0210976B1 true EP0210976B1 (fr) 1989-08-30

Family

ID=3530140

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860890187 Expired EP0210976B1 (fr) 1985-07-25 1986-06-19 Moteur à combustion interne monocylindrique avec balayage du carter du vilebrequin

Country Status (3)

Country Link
EP (1) EP0210976B1 (fr)
AT (1) AT395636B (fr)
DE (1) DE3665347D1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104314683A (zh) * 2014-09-25 2015-01-28 重庆特飞航空动力科技有限公司 改进型单缸二冲程水冷发动机
WO2023012334A1 (fr) 2021-08-06 2023-02-09 Innovacell Ag Cellules progénitrices myogènes destinées à être utilisées dans un procédé optimisé de prévention et de traitement de l'incontinence anale

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB714619A (en) * 1952-01-21 1954-09-01 William Thomas Teagle Improvements in or relating to two-stroke single cylinder internal combustion engines
US3386429A (en) * 1966-07-11 1968-06-04 Earl M. Trammell Jr. Internal combustion engine
DE3108519A1 (de) * 1981-03-06 1982-09-23 Helmut Bernhardt Gmbh & Co Kg, 8354 Metten Modellmotor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104314683A (zh) * 2014-09-25 2015-01-28 重庆特飞航空动力科技有限公司 改进型单缸二冲程水冷发动机
WO2023012334A1 (fr) 2021-08-06 2023-02-09 Innovacell Ag Cellules progénitrices myogènes destinées à être utilisées dans un procédé optimisé de prévention et de traitement de l'incontinence anale

Also Published As

Publication number Publication date
EP0210976A2 (fr) 1987-02-04
AT395636B (de) 1993-02-25
DE3665347D1 (en) 1989-10-05
EP0210976A3 (en) 1988-03-02
ATA221485A (de) 1992-06-15

Similar Documents

Publication Publication Date Title
DE69925345T2 (de) Durch den benutzer getragener 4-takt motor, der in verschiedenen lagen verwendet werden kann
DE19544533C2 (de) Schmierungssystem für einen Viertaktmotor
DE10123646B4 (de) Zweitakt-Verbrennungsmotor
DE19549188A1 (de) Viertaktmotor
EP0727013A1 (fr) Moteur a combustion interne
EP0064726B1 (fr) Moteur à combustion interne
DE2516796A1 (de) Regler zur geschwindigkeitsbegrenzung einer verbrennungsmaschine
DE3050893C2 (fr)
DE3125077A1 (de) Zweizylinder-viertakt-boxermotor, insbesondere fahrtwindluftgekuehlt fuer motorraeder
EP0210976B1 (fr) Moteur à combustion interne monocylindrique avec balayage du carter du vilebrequin
DE69021878T2 (de) Kolbenmaschine mit pumpenzylindern und kraftzylindern.
DE3342515C2 (de) Verbrennungsmaschine
EP0210975B1 (fr) Moteur à combustion interne avec balayage du carter du vilebrequin
DE10004103B4 (de) Hubkolbenbrennkraftmaschine
DE3447004C2 (de) Schwenkkolben-Brennkraftmaschine
DE1476086B1 (de) Zylinder fuer Zweitakt-Brennkraftmaschinen
DE69816309T2 (de) Zweitaktbrennkraftmaschine mit verbessertem brennstofffluss durch spülkanäle
EP0344597A2 (fr) Culasse pour moteur à combustion interne
DE855637C (de) Gemischverdichtende, schlitzgesteuerte Zweitaktbrennkraftmaschine
DE10257327B4 (de) Tragbare Motorsäge
DE69905809T2 (de) Schmierungssystem für einen Kolbenverdichter einer aufgeladenen Brennkraftmaschine
DE906033C (de) Zweitakt-Brennkraftmaschine mit Vergaser und Zuendkerze
DE10041010A1 (de) Viertaktmotor
DE877073C (de) Gemischverdichtende Zweitaktbrennkraftmaschine
DE4446478C2 (de) Schmiersystem für einen Verbrennungsmotor

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

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR IT

ITCL It: translation for ep claims filed

Representative=s name: MODIANO & ASSOCIATI S.R.L.

EL Fr: translation of claims filed
PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE FR IT

17P Request for examination filed

Effective date: 19880414

17Q First examination report despatched

Effective date: 19881222

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR IT

REF Corresponds to:

Ref document number: 3665347

Country of ref document: DE

Date of ref document: 19891005

ET Fr: translation filed
ITF It: translation for a ep patent filed
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: FR

Payment date: 19910627

Year of fee payment: 6

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: DE

Payment date: 19910826

Year of fee payment: 6

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

Ref country code: FR

Effective date: 19930226

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

Ref country code: DE

Effective date: 19930302

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

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

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050619