EP0115758A1 - Moteur à deux temps commandé par lumières - Google Patents

Moteur à deux temps commandé par lumières Download PDF

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Publication number
EP0115758A1
EP0115758A1 EP83890236A EP83890236A EP0115758A1 EP 0115758 A1 EP0115758 A1 EP 0115758A1 EP 83890236 A EP83890236 A EP 83890236A EP 83890236 A EP83890236 A EP 83890236A EP 0115758 A1 EP0115758 A1 EP 0115758A1
Authority
EP
European Patent Office
Prior art keywords
piston
channel
combustion engine
internal combustion
air
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Withdrawn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
EP83890236A
Other languages
German (de)
English (en)
Inventor
Alfred Rabl
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0115758A1 publication Critical patent/EP0115758A1/fr
Withdrawn legal-status Critical Current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
    • F02B25/20—Means for reducing the mixing of charge and combustion residues or for preventing escape of fresh charge through outlet ports not provided for in, or of interest apart from, subgroups F02B25/02 - F02B25/18
    • 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
    • F02B25/20—Means for reducing the mixing of charge and combustion residues or for preventing escape of fresh charge through outlet ports not provided for in, or of interest apart from, subgroups F02B25/02 - F02B25/18
    • F02B25/22—Means for reducing the mixing of charge and combustion residues or for preventing escape of fresh charge through outlet ports not provided for in, or of interest apart from, subgroups F02B25/02 - F02B25/18 by forming air cushion between charge and combustion residues
    • 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 slot-controlled two-stroke internal combustion engine with a crankcase purge pump and a purge air supply device, the purge air and the fuel mixture being fed separately to the combustion chamber via channels.
  • Valves for the suction of purge air arranged on the fuel mixture overflow channels are known. In these, the purge air was sucked into the crankcase and leaned the fuel mixture too much. There was not much left as a real purging air supply before the fuel mixture when changing the gas and the expected success was therefore lacking.
  • the subject of the invention is characterized in that the fuel mixture flows into the crankcase, and that the piston has an opening which intermittently communicates with a channel supplying purge air provided in the cylinder wall and allows fresh air to flow in to the piston crown when the piston is moving upwards, and that close to it Piston bottom and / or in the cylinder wall, a channel is provided through which the compressed air flows from the area of the piston head into the cylinder chamber at the end of the piston exit.
  • the two-stroke internal combustion engine according to Example 1 with the well-known reverse purging has an inlet channel 2 arranged on the cylinder 1 for the fuel mixture and on both sides of the outlet channel 4 fuel mixture overflow channels 3 and purge air overflow channels 16.
  • the outside of the piston 5 has a channel 10 which runs parallel to the longitudinal axis and opens into the piston cavity at its upper end.
  • the channel 10 is connected to the channel 9 on the cylinder wall 1.
  • the outside end of the channel 9 connects to the channel 11 with an interposed check valve 12 on.
  • the channel 11 opens into the carburetor 6 between the carburetor nozzle 17 and a throttle valve 13. If the piston goes down, the channel 15 in the piston 5 is connected to the purge air overflow channel 16 in the cylinder wall 1.
  • the bore 15 ends after the piston head 23, which means only air can safely enter the combustion chamber via the channels 16.
  • the two-stroke internal combustion engine according to the invention operates in the following manner: in the illustration according to FIG. 1, the piston 5 is in the intake position, the fuel mixture passing under the pistons 5 into the crankcase space of the crankcase 7 via the carburetor 6 and the inlet duct 2. However, this does not also reach the piston cavity 8 because purging air is sucked into the piston cavity via the channels 9 and 10.
  • the purpose of the channel 11 is that the purge air is also controlled with the fuel mixture by the throttle 13.
  • an air filter, a check valve 12 and only one channel guide into the piston cavity are sufficient.
  • the purge air intake can also be done separately, regardless of the carburetor, if you want to do without co-control.
  • the channel 10 sweeps with a piston 5 sliding down a web 14 in the intake duct 2, whereby a connection from the duct 10 to the intake duct 2 is prevented.
  • the carburetor 6 can just as well be a carburetor with a throttle piston, which also controls the purge air intake.
  • FIG. 2 shows how a channel in the piston is suitable for the air inlet into the piston cavity as well as for the air overflow into the combustion chamber.
  • the piston has a channel 20 which opens into the piston cavity 8 at its upper end with an opening 21.
  • the channel 20 is connected to the air overflow channel 18 and the valve 24, as a result of which air enters the piston cavity 8.
  • fuel mixture passes through opening 25 from a carburetor, not shown, into crankcase 7.
  • a carburetor not shown
  • crankcase 7 As piston 5 moves downward, air in the piston cavity and fuel mixture in the crankcase compress.
  • the combustion mixture flows through the channel 26 and air via the channel 18 into the combustion chamber. The air prevents the fuel mixture from flowing out into outlet 4.
  • the purge air construction shown in FIG. 2 can be operated without leaving the scope of the invention instead of the overflow channel 26 with the overflow channels 3 as shown in FIG.
  • the main idea of the invention is that there is an opening in the piston, which is periodically connected to a supply opening for fresh air in the cylinder, so that fresh air can get into the upper part of the interior of the piston, from where it through a Cylinder wall provided overflow channel or compressed through the opening 15 is transferred into the cylinder.
  • both openings ie the opening 15 and the channel 16
  • the overflow channel 16 and the opening 15 could then be omitted.
  • both measures could also be present together.
  • fresh air will flow through the overflow channel 18 and through the opening 21 into the interior of the piston in the position of the piston shown.
  • Channel 26 replaced.
  • Channel 25 corresponds to intake channel 6 and channel 3 to channel 26. However, either channel 3 or channel 26 could also be present.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
EP83890236A 1983-01-07 1983-12-28 Moteur à deux temps commandé par lumières Withdrawn EP0115758A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT4583 1983-01-07
AT45/83 1983-01-07

Publications (1)

Publication Number Publication Date
EP0115758A1 true EP0115758A1 (fr) 1984-08-15

Family

ID=3480071

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83890236A Withdrawn EP0115758A1 (fr) 1983-01-07 1983-12-28 Moteur à deux temps commandé par lumières

Country Status (1)

Country Link
EP (1) EP0115758A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3916063A1 (de) * 1988-05-26 1989-11-30 Kioritz Corp Zweitakt-brennkraftmaschine
AT400879B (de) * 1991-07-15 1996-04-25 Bombardier Rotax Gmbh Zweitakt-brennkraftmaschine mit einer kurbelkastenspülung
US6817323B2 (en) 2001-02-01 2004-11-16 John Arthur Notaras Internal combustion engine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE748415C (de) * 1937-06-24 1944-11-02 Gemischverdichtende Zweitaktbrennkraftmaschine
DE2621628A1 (de) * 1975-05-22 1976-12-09 Outboard Marine Corp Zweitakt-verbrennungsmotor
DE2943496A1 (de) * 1978-12-13 1980-06-26 Zschopau Motorrad Veb Zweitakt-brennkraftmaschine mit kurbelgehaeusepumpe
GB2115485A (en) * 1982-02-17 1983-09-07 Nat Res Dev Stratified charge two-stroke engines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE748415C (de) * 1937-06-24 1944-11-02 Gemischverdichtende Zweitaktbrennkraftmaschine
DE2621628A1 (de) * 1975-05-22 1976-12-09 Outboard Marine Corp Zweitakt-verbrennungsmotor
DE2943496A1 (de) * 1978-12-13 1980-06-26 Zschopau Motorrad Veb Zweitakt-brennkraftmaschine mit kurbelgehaeusepumpe
GB2115485A (en) * 1982-02-17 1983-09-07 Nat Res Dev Stratified charge two-stroke engines

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3916063A1 (de) * 1988-05-26 1989-11-30 Kioritz Corp Zweitakt-brennkraftmaschine
AT400879B (de) * 1991-07-15 1996-04-25 Bombardier Rotax Gmbh Zweitakt-brennkraftmaschine mit einer kurbelkastenspülung
US6817323B2 (en) 2001-02-01 2004-11-16 John Arthur Notaras Internal combustion engine

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

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AK Designated contracting states

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Effective date: 19850416