DE681793C - Two-stroke internal combustion engine with a crankcase charging pump - Google Patents

Two-stroke internal combustion engine with a crankcase charging pump

Info

Publication number
DE681793C
DE681793C DEP75913D DEP0075913D DE681793C DE 681793 C DE681793 C DE 681793C DE P75913 D DEP75913 D DE P75913D DE P0075913 D DEP0075913 D DE P0075913D DE 681793 C DE681793 C DE 681793C
Authority
DE
Germany
Prior art keywords
crankcase
internal combustion
combustion engine
charging pump
stroke internal
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
DEP75913D
Other languages
German (de)
Inventor
Fritz Prange
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
Priority to DEP75913D priority Critical patent/DE681793C/en
Application granted granted Critical
Publication of DE681793C publication Critical patent/DE681793C/en
Expired legal-status Critical Current

Links

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
    • 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
    • F02B2720/00—Engines with liquid fuel
    • F02B2720/13—Two stroke engines with ignition device
    • F02B2720/131—Two stroke engines with ignition device with measures for removing exhaust gases from the cylinder

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)

Description

Zweitakthrennkraftmaschine mit einer Kurbelgehäuseladepumpe Es ist eine Zweitaktbrennkraftmaschine mit einer Kurbelgehäuseladepumpe und vom Arbeits'kolben gesteuerten Ein- und Auslaßschlitzen bekannt, bei'der eine vom Arheitszylinder zum Kurbelgehäuse führende zusätzliche Leitung vorgesehen ist, durch die gegen Ende des Dehnungs-hubes vor öffnung des Zylindereinlasses Abgase in das Kurbelg6häuse eintreten. Bei dieser bekannten Maschine wird die Verbindungsleitung vor öffnung des Hauptauslasses geöffnet. Die in das Kurbelgehäuse übertretendenAbgase sind entsprechend noch verliältnismäßig hoch gespannt, -so daß die Gefahr der Vermischung mit der frischen Ladung besteht. Uni diese Gefahr zu verringern, werden bei der fraglichen bekannten Maschine die Abgase in eüie lange, mit dem Kurbelgehäuse in Verbindung stehende Kammeic geleitet.Two-stroke racing engine with a crankcase charge pump It is a two-stroke internal combustion engine with a crankcase charging pump and from the working piston controlled inlet and outlet slots known, bei'der one from the Arheitsylinder to Crankcase leading additional line is provided through the towards the end of the expansion stroke before opening the cylinder inlet exhaust gases into the crankcase enter. In this known machine, the connecting line is before opening of the main outlet is open. The exhaust gases entering the crankcase are corresponding still relatively high, so that there is a risk of mixing with the fresh cargo. Uni to reduce this risk will be in question known machine the exhaust gases in eüie long, in connection with the crankcase standing Kammeic headed.

Demgegenüber besteht die erfindunggsgemäßeNeuerung darin, daß dieVerbindungsleitung durch eine Steueröffnung im Kolbenmantel erst nach öffnung des Arbeitszylinderauslasses geöffnet und bei öffnung des Zy- lindereinlasses abgeschlossen wird. Es werden also nur verhältnismäßig niedrig gespannte Abgase in das Kurbelgehäuse geleitet. Die hierdurch hervorgerufene Erhöhung des Pumpendruc,kes ist aber ausreichend, um zu ermöglichen, daß sofort beim öffnen des Zy- lindereinlasses die Spülung einsetzt und nicht erst in der unteren Kolbentotlage. Dadurch wird eine verhältnismäßig lange Spülzeit erreicht, die eine gute Ausspülung der Abgase aus dem Arbeitszylinder ermöglicht, ohne daß umständliche baulicheEinrichtungen getroffen zu werden brauchen, um eine Verinischung der zur Druckerhöhung eingeführten Abgase mit der frischen Ladung im Kurbelgehäuse zu verhindern.In contrast, the innovation according to the invention consists in that the connecting line is only opened through a control opening in the piston jacket after the working cylinder outlet has been opened and is closed when the cylinder inlet is opened. So there are only relatively low stressed exhaust gases passed into the crankcase. The increase in pump pressure caused by this, however, is sufficient to enable flushing to begin immediately when the cylinder inlet is opened and not only in the lower piston dead position. As a result, a relatively long flushing time is achieved, which enables the exhaust gases to be flushed out of the working cylinder without the need for complicated structural arrangements to prevent the exhaust gases introduced to increase the pressure from mixing with the fresh charge in the crankcase.

Ein Ausführungsbeispiel der Erfindung ist auf der Zeichnung veranschaulicht; es zeigen: Abb. i einen Schnitt durch. Zylinder und Kurbelgehäuse eines Zweitaktmotors mit zusätzlicher Verbindungsleitung zwischen Arbeitszylinder und Kurbelgehäuse, Abb. 2 einen Schnitt nach der Linie A--4 der Abb. i.An embodiment of the invention is illustrated in the drawing; it show: Fig. i a section through. Cylinder and crankcase of a two-stroke engine with additional connecting line between the working cylinder and crankcase, Fig. 2 shows a section along the line A - 4 of Fig. I.

Beim Arbeitstakt bewegt sich der Kolbena nach unten und legt zunächst den Arbeitszylinderauslaß b teilweise frei; nunmehr kommt die Steueröffnung d im Kolbenmantel a mit der unteren Mündung c der Leitung/ in übereinstimmung, so daß ein Druckausgleich zwischen dem Arbeitszylinder und dem Kurbelgehäuse über dieebenfalls freiliegende Mündung g der Leitung/ erfolgen kann. Kurz vor Erreichung der unteren Totpunktlage wird der überströmkanal c geöffnet und die zusätzliche Leitung geschlossen.During the working cycle, the piston a moves downwards and initially exposes the working cylinder outlet b partially; Now the control opening d in the piston skirt a coincides with the lower opening c of the line / so that pressure equalization between the working cylinder and the crankcase can take place via the opening g of the line / which is also exposed. Shortly before the bottom dead center position is reached, the overflow channel c is opened and the additional line is closed.

Claims (1)

PATENTANSPRUCH: Zweitaktbrennkraftmaschine mit einer Kurbelgehäuseladepumpe und vom Arbeitskolben gesteuerten Ein- und Auslaßschlitzen, bei der eine vom Arbeitszylinder zum Kurbelgehäuse führende zusätzliche Leitung vorgesehen ist, durch die gegen Ende des Dehnungshubes vor öffnung des Zylindereinlasses Abgase in das Kurbelgehäuse eintreten, dadurch gekennzeichnet, daß die Verbindungsleitung (i) durch eine Steueröffnung -(d) im Kolbenmant#I erst nach öffnung des A#beitszylinderauslasses (b) geöffnet und bei Öffnung des Zylindereinlasses (c) abgeschlossen wird.PATENT CLAIM: Two-stroke internal combustion engine with a crankcase charging pump and inlet and outlet slots controlled by the working piston, in which an additional line leading from the working cylinder to the crankcase is provided through which exhaust gases enter the crankcase towards the end of the expansion stroke before the cylinder inlet opens, characterized in that the connecting line (i) through a control opening - (d) in the piston skirt # I is only opened after the opening of the A # beitsylinders outlet (b) and is closed when the cylinder inlet (c) is opened.
DEP75913D 1937-09-17 1937-09-17 Two-stroke internal combustion engine with a crankcase charging pump Expired DE681793C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP75913D DE681793C (en) 1937-09-17 1937-09-17 Two-stroke internal combustion engine with a crankcase charging pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP75913D DE681793C (en) 1937-09-17 1937-09-17 Two-stroke internal combustion engine with a crankcase charging pump

Publications (1)

Publication Number Publication Date
DE681793C true DE681793C (en) 1939-10-02

Family

ID=7392850

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP75913D Expired DE681793C (en) 1937-09-17 1937-09-17 Two-stroke internal combustion engine with a crankcase charging pump

Country Status (1)

Country Link
DE (1) DE681793C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3195524A (en) * 1962-07-30 1965-07-20 Outboard Marine Corp Engine
WO2000011334A1 (en) 1998-08-21 2000-03-02 Design & Manufacturing Solutions, Inc. Compressed air assisted fuel injection system
WO2001061166A1 (en) * 2000-02-14 2001-08-23 Design & Manufacturing Solutions, Inc. Compressed air assisted fuel injection system with variable effective reflection length

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3195524A (en) * 1962-07-30 1965-07-20 Outboard Marine Corp Engine
WO2000011334A1 (en) 1998-08-21 2000-03-02 Design & Manufacturing Solutions, Inc. Compressed air assisted fuel injection system
EP1108126A1 (en) * 1998-08-21 2001-06-20 Design & Manufacturing Solutions, Inc. Compressed air assisted fuel injection system
US6273037B1 (en) 1998-08-21 2001-08-14 Design & Manufacturing Solutions, Inc. Compressed air assisted fuel injection system
US6293235B1 (en) * 1998-08-21 2001-09-25 Design & Manufacturing Solutions, Inc. Compressed air assisted fuel injection system with variable effective reflection length
AU759748B2 (en) * 1998-08-21 2003-05-01 Design & Manufacturing Solutions, Inc. Compressed air assisted fuel injection system
EP1108126A4 (en) * 1998-08-21 2008-03-26 Design & Mfg Solutions Inc Compressed air assisted fuel injection system
WO2001061166A1 (en) * 2000-02-14 2001-08-23 Design & Manufacturing Solutions, Inc. Compressed air assisted fuel injection system with variable effective reflection length

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