EP1555402A2 - Eine Zweitaktbrennkraftmaschine, insbesondere für tragbare Werkzeuge wie Motorsäge, Buschschneiders usw... - Google Patents

Eine Zweitaktbrennkraftmaschine, insbesondere für tragbare Werkzeuge wie Motorsäge, Buschschneiders usw... Download PDF

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Publication number
EP1555402A2
EP1555402A2 EP05000886A EP05000886A EP1555402A2 EP 1555402 A2 EP1555402 A2 EP 1555402A2 EP 05000886 A EP05000886 A EP 05000886A EP 05000886 A EP05000886 A EP 05000886A EP 1555402 A2 EP1555402 A2 EP 1555402A2
Authority
EP
European Patent Office
Prior art keywords
piston
valve
internal combustion
combustion engine
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.)
Withdrawn
Application number
EP05000886A
Other languages
English (en)
French (fr)
Other versions
EP1555402A3 (de
Inventor
Mirko Possamai
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.)
Euromotor SpA
Original Assignee
Euromotor SpA
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 Euromotor SpA filed Critical Euromotor SpA
Publication of EP1555402A2 publication Critical patent/EP1555402A2/de
Publication of EP1555402A3 publication Critical patent/EP1555402A3/de
Withdrawn legal-status Critical Current

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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
    • F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
    • F02B25/02—Engines characterised by using fresh charge for scavenging cylinders using unidirectional scavenging

Definitions

  • This invention relates to a two-stroke internal combustion engine, in particular for portable tools such as power saws, bush cutters, etc.
  • Two-stroke engines comprising a bed on which a cylindrical seat for the reciprocating piston is applied, to which the inlet port for the mixture and the outlet port for the spent gas are connected.
  • An object of the invention is to eliminate this drawback by providing a two-stroke internal combustion engine having high efficiency and low fuel consumption while at the same time not causing atmospheric pollution.
  • the internal combustion engine comprises substantially a bed 2 provided with a cylindrical seat 6 presenting cooling fins 4 and within which there slides a piston 8 provided with a connecting rod 10 pivoted by a pin 12 to a crank 14.
  • the conduit 20 feeding the mixture from the carburettor and the electrodes 22 of the spark plug 26 lead into the cylindrical seat, which also presents a further aperture 28 connecting the cylindrical chamber to the conduit 30 for discharging the exhaust gas to a silencer (not shown in the drawings) via an interposed valve 32.
  • the valve 32 consists of a cylindrical body comprising a channel 34 of substantially rectangular cross-section with its axis perpendicular to the axis of the cylindrical body and rigid with a shaft 36, mounted on bearings 38, which engages by means of a taper fit a ring gear 40 connected by a belt 42 to a further ring gear 44 keyed onto the rotation shaft of the crank 14.
  • the ring gear 40 has twice the number of teeth as the ring gear 44, so that one complete rotation of the crank 14 corresponds to one half of a rotation of the valve 32.
  • the two ring gears 40 and 44 are mutually coordinated such that when the piston lies in its bottom dead centre position, the channel 34 of the cylindrical body almost completely faces the discharge aperture 30.
  • the internal combustion engine operates in the following manner, with reference to Figures 1-5.
  • the shaft 36 engages a gearwheel 50 engaging an intermediate gearwheel 52 which itself engages a gearwheel 54 keyed onto the crankshaft 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Transmission Devices (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
EP05000886A 2004-01-19 2005-01-18 Eine Zweitaktbrennkraftmaschine, insbesondere für tragbare Werkzeuge wie Motorsäge, Buschschneiders usw... Withdrawn EP1555402A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITVE20040002U 2004-01-19
ITVE20040002 ITVE20040002U1 (it) 2004-01-19 2004-01-19 Motore a combustione interna a due tempi, in particolare per attrezzat ure portatili quali motoseghe, decespugliatori, ecc.

Publications (2)

Publication Number Publication Date
EP1555402A2 true EP1555402A2 (de) 2005-07-20
EP1555402A3 EP1555402A3 (de) 2009-07-22

Family

ID=34611272

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05000886A Withdrawn EP1555402A3 (de) 2004-01-19 2005-01-18 Eine Zweitaktbrennkraftmaschine, insbesondere für tragbare Werkzeuge wie Motorsäge, Buschschneiders usw...

Country Status (2)

Country Link
EP (1) EP1555402A3 (de)
IT (1) ITVE20040002U1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1040344C2 (nl) * 2013-08-21 2015-02-24 Vhm Van Haandel Motorparts B V Tweetaktmotorblok met vernieuwend carter, waarbij technische oplossingen zijn gevonden. het carter is geconstrueerd zodat de carburateur horizontaal gepositioneerd kan worden. de rotatie richting van de krukas is omgekeerd t.o.v. een bestaand motorblok. de krukas roteert dezelfde richting op als de stromingsrichting van het lucht-brandstofmengsel. het lucht-brandstofmengsel stroomt vanuit de carburateur via een apart flow kanaal in het carter om de krukas heen. een tussentandwiel is overbodig bij het vernieuwend carter.
CN108757962A (zh) * 2018-06-13 2018-11-06 宁波市鄞州拓创服饰有限公司 一种调流阀

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4864984A (en) * 1986-09-02 1989-09-12 Blish Nelson A Rotary valve internal combustion engine
DE4438513A1 (de) * 1994-10-31 1996-05-02 Siegbert A Woll Selbsttätige Auslaßregelung für 2-Takt-Motoren
DE9420091U1 (de) * 1994-12-16 1995-02-16 Wieneke, Svein, 41063 Mönchengladbach Opto-Elektronische Steuerung der Auslaß-Kanal-Querschnitt-Verstellungseinheit für Zweitakt-Verbrennungsmotoren
NO314553B1 (no) * 2001-08-20 2003-04-07 Ragnar Aanmoen Anordning ved 4-takt forbrenningsmotor
US20030230258A1 (en) * 2002-06-12 2003-12-18 Niemiz Hector Alvaro Javier Two-stroke engines exhaust and scavenge control

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1040344C2 (nl) * 2013-08-21 2015-02-24 Vhm Van Haandel Motorparts B V Tweetaktmotorblok met vernieuwend carter, waarbij technische oplossingen zijn gevonden. het carter is geconstrueerd zodat de carburateur horizontaal gepositioneerd kan worden. de rotatie richting van de krukas is omgekeerd t.o.v. een bestaand motorblok. de krukas roteert dezelfde richting op als de stromingsrichting van het lucht-brandstofmengsel. het lucht-brandstofmengsel stroomt vanuit de carburateur via een apart flow kanaal in het carter om de krukas heen. een tussentandwiel is overbodig bij het vernieuwend carter.
CN108757962A (zh) * 2018-06-13 2018-11-06 宁波市鄞州拓创服饰有限公司 一种调流阀

Also Published As

Publication number Publication date
ITVE20040002U1 (it) 2004-04-19
EP1555402A3 (de) 2009-07-22

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