DE4118254A1 - High-power reverse-flow-scavenged two-stroke engine - features supercharging by continued admission of air through diaphragm control to scavenging port before fuel injection - Google Patents

High-power reverse-flow-scavenged two-stroke engine - features supercharging by continued admission of air through diaphragm control to scavenging port before fuel injection

Info

Publication number
DE4118254A1
DE4118254A1 DE4118254A DE4118254A DE4118254A1 DE 4118254 A1 DE4118254 A1 DE 4118254A1 DE 4118254 A DE4118254 A DE 4118254A DE 4118254 A DE4118254 A DE 4118254A DE 4118254 A1 DE4118254 A1 DE 4118254A1
Authority
DE
Germany
Prior art keywords
air
cylinder
outlet slot
control
slot
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Withdrawn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
DE4118254A
Other languages
German (de)
Inventor
Kurt Jurack
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 DE4118254A priority Critical patent/DE4118254A1/en
Publication of DE4118254A1 publication Critical patent/DE4118254A1/en
Withdrawn legal-status Critical Current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
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/08—Modifying distribution valve timing for charging purposes
    • F02B29/083—Cyclically operated valves disposed upstream of the cylinder intake valve, controlled by external means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L7/00—Rotary or oscillatory slide valve-gear or valve arrangements
    • F01L7/12—Rotary or oscillatory slide valve-gear or valve arrangements specially for two-stroke engines
    • 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
    • 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
    • F02B27/00—Use of kinetic or wave energy of charge in induction systems, or of combustion residues in exhaust systems, for improving quantity of charge or for increasing removal of combustion residues
    • F02B27/005—Oscillating pipes with charging achieved by arrangement, dimensions or shapes of intakes pipes or chambers; Ram air pipes
    • F02B27/006—Oscillating pipes with charging achieved by arrangement, dimensions or shapes of intakes pipes or chambers; Ram air pipes of intake runners
    • 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
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • 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
    • F02B33/30—Control of inlet or outlet ports
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)

Abstract

Air is inducted (8) and lubricant injected (12) during the downward stroke which compresses air in the crankcase (13) until the piston (1) uncovers the exhaust port (9) leading to a rotary valve (3) of wider cross-section (5). The partial vacuum draws air through the scavenging port (10). The compressed air flows through the transfer port (7) into the combustion chamber while the valve (30 rotates to half-close the exhaust port (9) before fuel is injected (14). The diaphragm control (11) continues to admit air until the scavenging port (10) is closed. ADVANTAGE - Engine power and efficiency are increased without loss of fuel.

Description

Bei der Abwärtsbewegung des Kolbens 1 wird Luft durch den Membraneinlaß 8 in das Gehäuse 13 gesaugt und gleichzeitig Öl durch den Anschluß 12 eingespritzt. Die Abwärtsbewegung des Kolbens 1 verdichtet die Luft im Gehäuse 13, um zum Zeitpunkt des Druckabfalls im Zylinder 2 über die diametral zueinander angeordneten Überströmkanäle 7 in den Zylinder 2 gedrückt zu werden. Der übliche Ablauf wie bei konventionellen 2-Taktmotoren. Der Kolben 1 bewegt sich zum O.T., und einige Millimeter vor dem O.T. erfolgt die Zündung. Bei der Abwärtsbewegung des Kolbens 1 und bei Erreichung des Auslaßschlitzes 9 hat die Steuerwalze 3 mit dem Kanal 5 bereits den übergroßen Öffnungsquerschnitt zum Auslaßschlitz 9 hergestellt. Der Kolben 1 öffnet den Auslaßschlitz 9, und die verbrannten Gase entspannen sich mit noch hohem Druck in den Auslaßtrakt. Es entsteht ein Unterdruck im Zylinder 2. Zum Zeitpunkt des entstehenden Unterdrucks wird Luft durch die Membransteuerung 11 und den Spülschlitz 10 in den Zylinder 2 in einen Winkel von 35° eingesaugt. Die noch vorhandenen Restgase werden ausgespült. Gleichzeitig strömt die im Gehäuse 13 verdichtete Luft über die diametral zueinander angeordneten Überströmkanäle 7 in einen Winkel von 35° nach oben gerichtet in den Zylinder 2 ein. During the downward movement of the piston 1 , air is sucked through the membrane inlet 8 into the housing 13 and at the same time oil is injected through the connection 12 . The downward movement of the piston 1 compresses the air in the housing 13 so as to be pressed at the time of the pressure drop in the cylinder 2 via the diametrically arranged mutually transfer channels 7 in the cylinder. 2 The usual procedure as with conventional 2-stroke engines. Piston 1 moves to TDC, and ignition occurs a few millimeters before TDC. When the piston 1 moves downward and when the outlet slot 9 is reached , the control roller 3 with the channel 5 has already produced the oversized opening cross-section to the outlet slot 9 . The piston 1 opens the outlet slot 9 and the burned gases relax into the outlet tract with high pressure. A negative pressure is created in cylinder 2 . At the time of the resulting negative pressure, air is drawn into the cylinder 2 at an angle of 35 ° through the diaphragm control 11 and the flushing slot 10 . The remaining gases are flushed out. At the same time, the air compressed in the housing 13 flows into the cylinder 2 at an angle of 35 ° upwards through the diametrically arranged overflow channels 7 .

Der Kolben 1 hat den U.T. erreicht, und die Steuerwalze 3 hat durch Weiterdrehen den Auslaßquerschnitt zum Auslaßschlitz 9 hin halb verschlossen. Zu diesem Zeitpunkt erfolgt etwa die Kraftstoffeinspritzung über die Düse 14. Bis zum Überlaufen des Spülschlitzes 10 durch den Kolben 1 strömt Luft über die Membransteuerung 11 in den Zylinder 2 ein. Diese Luftmenge gibt eine zusätzliche Füllung des Zylinders 2.The piston 1 has reached the UT, and the control roller 3 has closed the outlet cross section to the outlet slot 9 by turning further. At this point, fuel is injected via the nozzle 14 , for example. Until the flushing slot 10 overflows through the piston 1 , air flows into the cylinder 2 via the membrane control 11 . This amount of air gives an additional filling of the cylinder 2 .

Der Kolben 1 bewegt sich zum O.T. und verdichtet das Kraftstoff- Luftgemisch bis zur Errichtung des Zündzeitpunktes. Die Steuerwalze 2 läuft mit halber Motordrehzahl.Piston 1 moves to TDC and compresses the air / fuel mixture until the ignition point is established. The control roller 2 runs at half the engine speed.

Claims (7)

1. Hochleistungs-2-Takt-Brennkraftmaschine mit Kraftstoffeinspritzung und einer Steuerwalze, die vor dem Auslaßschlitz angebracht ist, um den Auslaßquerschnitt elektronisch oder rotierend zu verändern und eine Membransteuerung, die diametral zum Auslaßschlitz angebracht ist und beim entstandenen Unterdruck im Zylinder zusätzlich Luft zu der im Gehäuse verdichteten Luftmenge in den Zylinder einströmen läßt, dadurch gekennzeichnet, daß die Steuerwalze 3 elektronisch oder rotierend den Querschnitt des Auslaßschlitzes 9 verändert und daß die Steuerwalze 3 mit dem Kanal 5 beim Öffnen des Auslaßschlitzes 9 durch den Kolben 1 den vollen Öffnungsquerschnitt freigegeben hat, so daß die mit hohem Druck sich entspannenden Brenngase den Unterdruck im Zylinder 2 erzeugen. Der Unterdruck saugt Luft durch die Membransteuerung 11 über den Spülschlitz 10 in den Zylinder 2, so daß eine zusätzliche Füllung entsteht.1. High-performance 2-stroke internal combustion engine with fuel injection and a control roller, which is attached in front of the outlet slot to change the outlet cross section electronically or rotationally and a diaphragm control, which is attached diametrically to the outlet slot and additional air to the resulting negative pressure in the cylinder air volume compressed in the housing can flow into the cylinder, characterized in that the control roller 3 electronically or rotatingly changes the cross section of the outlet slot 9 and that the control roller 3 with the channel 5 has opened the full opening cross section when the outlet slot 9 is opened by the piston 1 , so that the fuel gases relaxing at high pressure generate the negative pressure in cylinder 2 . The negative pressure sucks air through the membrane control 11 via the flushing slot 10 into the cylinder 2 , so that an additional filling is created. 2. Nach den Anspruch 1, noch dadurch gekennzeichnet, daß bis zum Überlaufen des Spülschlitzes 10 durch den Kolben 1 Luft durch die Membransteuerung 11 in einen Winkel von 35° nach oben gerichtet, in den Zylinder 2 einströmt.2. According to claim 1, further characterized in that up to the overflow of the flushing slot 10 through the piston 1 air directed through the membrane control 11 at an angle of 35 ° upwards, flows into the cylinder 2 . 3. Nach den Ansprüchen 1 bis 2, noch dadurch gekennzeichnet, daß die vom Kolben 1 in das Gehäuse 13 eingesaugte und verdichtete Luft in einem Winkel von 35° nach oben gerichtet über die Überströmkanäle 7 bei etwa halb verschlossenem Auslaßschlitz 9 in den Zylinder 2 gedrückt wird.3. According to claims 1 to 2, characterized in that the air sucked in by the piston 1 into the housing 13 and compressed at an angle of 35 ° directed upward over the overflow channels 7 at approximately half-closed outlet slot 9 in the cylinder 2 becomes. 4. Nach den Ansprüchen 1 bis 3, noch dadurch gekennzeichnet, daß die Querschnittsänderung des Auslaßschlitzes 9 durch die Steuerwalze 3 bei elektronischer Steuerung der Motordrehzahl entsprechend gesteuert wird. 4. According to claims 1 to 3, characterized in that the cross-sectional change of the outlet slot 9 is controlled accordingly by the control roller 3 with electronic control of the engine speed. 5. Nach den Ansprüchen 1 bis 4, noch dadurch gekennzeichnet, daß die Spülschlitzhöhe 10 niedriger ist als die des Auslaßschlitzes 9, um die Membransteuerung 11 vom hohen Öffnungsdruck, der beim Öffnen des Auslaßschlitzes 9 durch den Kolben 1 noch vorhanden ist, zu entlasten.5. According to claims 1 to 4, characterized in that the flushing slot height 10 is lower than that of the outlet slot 9 to relieve the diaphragm control 11 from the high opening pressure which is still present when the outlet slot 9 is opened by the piston 1 . 6. Nach den Ansprüchen 1 bis 5, noch dadurch gekennzeichnet, daß die Schmierung des Motors durch Öleinspritzen über den Anschluß 12 in das Gehäuse 13 erfolgt.6. According to claims 1 to 5, characterized in that the lubrication of the engine is carried out by oil injection via the connection 12 into the housing 13 . 7. Nach den Ansprüchen 1 bis 6, noch dadurch gekennzeichnet, daß die Steuerwalze 3 bei rotierender Bewegung mit halber Motordrehzahl läuft.7. According to claims 1 to 6, characterized in that the control roller 3 runs at half the engine speed when rotating.
DE4118254A 1991-06-04 1991-06-04 High-power reverse-flow-scavenged two-stroke engine - features supercharging by continued admission of air through diaphragm control to scavenging port before fuel injection Withdrawn DE4118254A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4118254A DE4118254A1 (en) 1991-06-04 1991-06-04 High-power reverse-flow-scavenged two-stroke engine - features supercharging by continued admission of air through diaphragm control to scavenging port before fuel injection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4118254A DE4118254A1 (en) 1991-06-04 1991-06-04 High-power reverse-flow-scavenged two-stroke engine - features supercharging by continued admission of air through diaphragm control to scavenging port before fuel injection

Publications (1)

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DE4118254A1 true DE4118254A1 (en) 1991-10-31

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DE4118254A Withdrawn DE4118254A1 (en) 1991-06-04 1991-06-04 High-power reverse-flow-scavenged two-stroke engine - features supercharging by continued admission of air through diaphragm control to scavenging port before fuel injection

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4140627A1 (en) * 1991-12-10 1992-07-16 Kurt Jurack IC engine with double-acting working piston - has two working strokes for each crankshaft rotation
DE20020040U1 (en) 2000-11-25 2001-07-12 Terlutter, Theo, 33428 Harsewinkel Rotary rotary valve in the rotary valve housing for filling a reciprocating piston engine with a gas-air mixture
CN102518507A (en) * 2012-01-06 2012-06-27 何凌锋 Forced air inflow device of internal combustion engine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3687118A (en) * 1969-07-14 1972-08-29 Yamaha Hatsudaki Kk Crank chamber compression-type two-cycle engine
DE4039726A1 (en) * 1990-12-13 1991-05-29 Kurt Jurack Controlling ports of two=stroke engine - involves use of electronically or mechanically operated rollers with internal channels

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3687118A (en) * 1969-07-14 1972-08-29 Yamaha Hatsudaki Kk Crank chamber compression-type two-cycle engine
DE4039726A1 (en) * 1990-12-13 1991-05-29 Kurt Jurack Controlling ports of two=stroke engine - involves use of electronically or mechanically operated rollers with internal channels

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4140627A1 (en) * 1991-12-10 1992-07-16 Kurt Jurack IC engine with double-acting working piston - has two working strokes for each crankshaft rotation
DE20020040U1 (en) 2000-11-25 2001-07-12 Terlutter, Theo, 33428 Harsewinkel Rotary rotary valve in the rotary valve housing for filling a reciprocating piston engine with a gas-air mixture
CN102518507A (en) * 2012-01-06 2012-06-27 何凌锋 Forced air inflow device of internal combustion engine

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Legal Events

Date Code Title Description
OAV Applicant agreed to the publication of the unexamined application as to paragraph 31 lit. 2 z1
OP8 Request for examination as to paragraph 44 patent law
8122 Nonbinding interest in granting licences declared
8130 Withdrawal