EP0370999A1 - Zweitakt-Brennkraftmaschine - Google Patents

Zweitakt-Brennkraftmaschine Download PDF

Info

Publication number
EP0370999A1
EP0370999A1 EP89890302A EP89890302A EP0370999A1 EP 0370999 A1 EP0370999 A1 EP 0370999A1 EP 89890302 A EP89890302 A EP 89890302A EP 89890302 A EP89890302 A EP 89890302A EP 0370999 A1 EP0370999 A1 EP 0370999A1
Authority
EP
European Patent Office
Prior art keywords
flow
internal combustion
combustion engine
stroke internal
guide surfaces
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Withdrawn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
EP89890302A
Other languages
German (de)
English (en)
French (fr)
Inventor
Diethard Dipl.-Ing. Plohberger
Karl Dipl.-Ing. Wojik
Klaus Dr. Landfahrer
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 List GmbH
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 List GmbH, AVL Gesellschaft fuer Verbrennungskraftmaschinen und Messtechnik mbH filed Critical AVL List GmbH
Publication of EP0370999A1 publication Critical patent/EP0370999A1/de
Withdrawn legal-status Critical Current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
    • 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
    • F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
    • F02B25/14—Engines characterised by using fresh charge for scavenging cylinders using reverse-flow scavenging, e.g. with both outlet and inlet ports arranged near bottom of piston stroke
    • 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 two-stroke internal combustion engine with piston-controlled inlet channels for the fresh charge, which have a plurality of flow control surfaces in the region of their sections directly adjoining the cylinder and with at least one outlet channel for the combustion gases.
  • the object of the invention is to avoid these disadvantages and to prevent the flushing flow from deviating from the specified direction both in the vertical and in the horizontal direction.
  • the invention consists primarily in the fact that the flow guide surfaces are at an angle, preferably at right angles, to one another and thus form a flow straightener.
  • the number of flow guide surfaces for the flushing flow is thus increased many times over compared to the version without a flow straightener, so that the flushing medium emerging from the flushing channel essentially adheres to the direction specified by the duct and flow straightener.
  • the flow straighteners according to the invention result in increased friction losses in the flushing flow, these are more than compensated for by the considerable reduction in fresh charge losses, which is clearly shown in an improvement in engine performance and in fuel consumption and exhaust gas emissions.
  • the flow guide surfaces can be arranged flat and in parallel in at least two groups and in groups at such angles to one another that they form closed flow channels.
  • Flow channels with differently sized and differently shaped cross sections can thus be produced in a simple manner and the behavior of the flushing flow can thus be largely predetermined.
  • An advantageous embodiment according to the invention consists in that the part of the intake manifold adjoining the cylinder is made cylindrical and the flow straightener is inserted as one piece in it.
  • the fresh charge losses to be avoided can also be favorably influenced by the fact that the imaginary extensions of the flow control surfaces, which are arranged parallel to the cylinder axis, converge centrally to a point in the cylinder at the half opposite the outlet.
  • the flow channels formed can be rectangular in cross section, preferably square, but also hexagonal in cross section and honeycomb-shaped to form the flow straightener.
  • the flow guide surfaces be made very thin-walled and preferably made of sheet metal.
  • a two-stroke internal combustion engine of known design is shown in half, the cylinder being designated 1, the cylinder head 2 and the piston 3.
  • the piston 3 controls the outlet channel 4 and the two inlet channels 5 arranged on both sides of the outlet channel 4.
  • the rinsing flow when the piston 3 is moved downwards in accordance with the arrow 6 is indicated by the flow lines 7.
  • the flow is deflected from the theoretical flow direction given by the channel boundaries 8, forming vortices, which are denoted by 7'. This causes increased friction and fresh charge losses.
  • flow guide surfaces 11 are arranged in the area 9 of the elbow 10 of the inlet channels 5 and run parallel to the cylinder axis 12. Transversely to this, flow guide surfaces 13 are provided, which together with the flow guide surfaces 11 form flow channels 14, which cause the flow illustrated by the arrows 15 to remain unaffected by the piston edge 3 '. This also eliminates the unfavorable effects in terms of engine performance, fresh charge losses and exhaust gas emissions.
  • FIGS. 5 and 6 shows two variants according to the invention, which have in common that the areas 9 of the elbows 10 of the inlet channels 5 are cylindrical and therefore the manufacture and assembly of the flow straightener 16 is simplified.
  • inflow channels 18 and 19 are provided on both sides of the outlet channel 4, which are also equipped with flow guide surfaces 11, 13 and 20, 21 in the area 9 of the manifold 10.
  • the inlet channels 18 are directed against the cylinder wall 22 opposite the outlet channel 4, whereas the inlet channels 19 are directed approximately against the axis 12 of the cylinder.
  • the version a) has flow channels with a square cross section
  • the version b) has flow channels 14 ', which are arranged in a honeycomb-like manner and are hexagonal.
  • the embodiment according to c) has flow channels 14 ⁇ with a rectangular cross section, which are arranged offset in the vertical direction by half the length of the cross section. The selection of the best version is generally determined by experiment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
EP89890302A 1988-11-24 1989-11-21 Zweitakt-Brennkraftmaschine Withdrawn EP0370999A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0289288A AT402431B (de) 1988-11-24 1988-11-24 Zweitakt-brennkraftmaschine
AT2892/88 1988-11-24

Publications (1)

Publication Number Publication Date
EP0370999A1 true EP0370999A1 (de) 1990-05-30

Family

ID=3541951

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89890302A Withdrawn EP0370999A1 (de) 1988-11-24 1989-11-21 Zweitakt-Brennkraftmaschine

Country Status (4)

Country Link
US (1) US5040496A (enrdf_load_stackoverflow)
EP (1) EP0370999A1 (enrdf_load_stackoverflow)
JP (1) JPH0367016A (enrdf_load_stackoverflow)
AT (1) AT402431B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102230421A (zh) * 2011-05-25 2011-11-02 中国兵器工业集团第七○研究所 二冲程发动机双进气道进气装置

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2602803Y2 (ja) * 1992-10-08 2000-01-31 株式会社共立 ２サイクルエンジンのシリンダ
US5490483A (en) * 1994-02-23 1996-02-13 Daihatsu Motor Co., Ltd. Two-cycle internal combustion engine
JPH0988617A (ja) * 1995-09-18 1997-03-31 Yamaha Motor Co Ltd ２サイクルエンジン
JP3630897B2 (ja) * 1997-02-10 2005-03-23 株式会社共立 ２サイクル内燃エンジン
US5769040A (en) 1997-04-18 1998-06-23 Christner; Oval F. Two cycle internal combustion engine
AT4876U1 (de) * 2000-05-04 2001-12-27 Avl List Gmbh Brennkraftmaschine mit zumindest zwei einlasskanälen pro zylinder
CN2424304Y (zh) 2000-06-15 2001-03-21 韩晓静 新型二冲程发动机
US7307071B2 (en) 2001-12-04 2007-12-11 Onyx Pharmaceuticals, Inc RAF-MEK-ERK pathway inhibitors to treat cancer
DE102005019520B4 (de) * 2005-04-27 2017-05-04 Andreas Stihl Ag & Co. Kg Zylinder für einen Zweitaktmotor
JP5024230B2 (ja) * 2008-08-12 2012-09-12 日立工機株式会社 層状掃気２サイクルエンジン及び２サイクルエンジン工具
JP5060459B2 (ja) * 2008-12-08 2012-10-31 株式会社やまびこ ２サイクルエンジン
DE102017206430A1 (de) * 2017-04-13 2018-10-18 Arno Leuschner Vorrichtung zur Weiterleitung eines gasförmigen Volumenstroms bei einem Verbrennungsmotor und Verfahren zum Betrieb eines Verbrennungsmotors sowie Verfahren zur Nachrüstung eines Verbrennungsmotors

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH109360A (de) * 1922-12-23 1925-03-16 Georg Prof Held Zweitakteinspritzverbrennungsmotor.
FR767274A (fr) * 1933-02-23 1934-07-13 Sulzer Ag Moteur à combustion interne à deux temps, dans lequel l'air est introduit dans le cylindre moteur par des lumières pourvues de pièces rapportées
DE651632C (de) * 1935-11-22 1937-10-21 Auto Union A G Brennkraftmaschine, insbesondere Zweitaktbrennkraftmaschine, mit vom Arbeitskolben gesteuerten UEberstroemschlitzen

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191319784A (en) * 1913-01-14 1913-10-16 Heinrich Borchers Improvements in the Scavenging of Two-stroke Cycle Internal Combustion Engines.
US1176096A (en) * 1915-04-21 1916-03-21 Oskar Richter Two-stroke-cycle internal-combustion engine.
CH112277A (de) * 1924-04-08 1925-10-16 Maschf Augsburg Nuernberg Ag Zweitaktverbrennungskraftmaschine mit Schlitzspülung.
US2016344A (en) * 1933-02-23 1935-10-08 Sulzer Ag Two stroke internal combustion engine
US2137344A (en) * 1936-04-08 1938-11-22 John J Mccarthy Directional intake control for internal combustion engines
US2244453A (en) * 1937-12-04 1941-06-03 Fottinger Hermann Scavenging of two-stroke cycle internal combustion engines
DE731097C (de) * 1940-03-07 1943-02-02 Auto Union A G Brennkraftmaschine, insbesondere Zweitaktbrennkraftmaschine, mit vom Arbeitskolben geteuerten Einlassschlitzen
US2406404A (en) * 1945-10-12 1946-08-27 Mcculloch Aviat Inc Internal-combustion engine
US2756731A (en) * 1951-06-13 1956-07-31 Wille Rudolf Air-guiding means in the intake conduit of an internal combustion engine
US2778348A (en) * 1953-11-25 1957-01-22 Gen Motors Corp Engine scavenging means
US3494335A (en) * 1968-05-03 1970-02-10 Brunswick Corp Internal combustion engine
DE3041560A1 (de) * 1980-11-04 1982-06-09 Ficht GmbH, 8011 Kirchseeon Zweitakt-brennkraft-kolbenmaschine mit einer einrichtung zum spuelen der zylinder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH109360A (de) * 1922-12-23 1925-03-16 Georg Prof Held Zweitakteinspritzverbrennungsmotor.
FR767274A (fr) * 1933-02-23 1934-07-13 Sulzer Ag Moteur à combustion interne à deux temps, dans lequel l'air est introduit dans le cylindre moteur par des lumières pourvues de pièces rapportées
DE651632C (de) * 1935-11-22 1937-10-21 Auto Union A G Brennkraftmaschine, insbesondere Zweitaktbrennkraftmaschine, mit vom Arbeitskolben gesteuerten UEberstroemschlitzen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102230421A (zh) * 2011-05-25 2011-11-02 中国兵器工业集团第七○研究所 二冲程发动机双进气道进气装置

Also Published As

Publication number Publication date
JPH0367016A (ja) 1991-03-22
AT402431B (de) 1997-05-26
JPH0379533B2 (enrdf_load_stackoverflow) 1991-12-19
ATA289288A (de) 1996-09-15
US5040496A (en) 1991-08-20

Similar Documents

Publication Publication Date Title
EP0370999A1 (de) Zweitakt-Brennkraftmaschine
DE10334347A1 (de) Kraftstoffeinspritzventil und Verbrennungsmotor mit Kraftstoffeinspritzventil
DE2645120C2 (de) Sechszylinder-Brennkraftmaschine
DE2657890C3 (de) Brennkraftmaschine mit einem von Kühlwasser durchströmten Zylinderblock
DE3244854A1 (de) Brenner
DE2205573C3 (de) Viertakt-Brennkraftmaschine mit mindestens zwei Zylindern
DE2316012C3 (de) Brennkammer, insbesondere für pulsierende Verbrennung
DE2223655A1 (de) Vorrichtung zur vorwaermung des angesaugten kraftstoff-luft-gemisches durch die abgase bei verbrennungsmotoren mit gesteuerter fremdzuendung, insbesondere in kraftfahrzeugen
DE69621216T2 (de) Brennkraftmaschine mit mehreren Einlassventilen pro Zylinder
DE2616835C2 (de) Ansaugleitungsystem für eine Mehrzylinder-Brennkraf tmaschine
DE642545C (de) Zweitaktbrennkraftmaschine mit Umkehrschlitzspuelung
DE2548540B2 (de) Brennkammer für einen Flüssigkeitserhitzer
DE2807641A1 (de) Auspuffgas-reinigungsvorrichtung
DE555152C (de) Zweitaktbrennkraftmaschine mit Schlitzspuelung
DE675692C (de) Zweitaktbrennkraftmaschine mit einseitiger Umkehrspuelung
DE2932627A1 (de) Zwei-takt-verbrennungsmotor mit gleichstromgespuelten zylindern
DE2306375A1 (de) Mit ladungsschichtung betriebene brennkraftmaschine
DE2420947C3 (enrdf_load_stackoverflow)
DE3343691A1 (de) Einlasssystem fuer rotationskolbenmotoren
DE3116638A1 (de) Unterteilte brennkammer fuer motoren
DE2319662C3 (de) Zylinder für Zweitakt-Hubkolben- Brennkraftmaschinen
DE590424C (de) Zweitaktbrennkraftmaschine mit Querstrom- oder Umkehrstromspuelung und einer Mehrzahl von Spuelschlitzen verschiedenen Querschnitts
DE2449628B2 (de) Zweitakt-brennkraftmaschine
DE650267C (de) Zweitaktbrennkraftmaschine mit vom Arbeitskolben gesteuerten Ein- und Auslassschlitzen
DE919852C (de) Schlitzgesteuerter Zweitakt-Dieselmotor

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: A1

Designated state(s): DE IT SE

17P Request for examination filed

Effective date: 19900411

17Q First examination report despatched

Effective date: 19910417

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

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19920125