DE4039726A1 - Controlling ports of two=stroke engine - involves use of electronically or mechanically operated rollers with internal channels - Google Patents

Controlling ports of two=stroke engine - involves use of electronically or mechanically operated rollers with internal channels

Info

Publication number
DE4039726A1
DE4039726A1 DE19904039726 DE4039726A DE4039726A1 DE 4039726 A1 DE4039726 A1 DE 4039726A1 DE 19904039726 DE19904039726 DE 19904039726 DE 4039726 A DE4039726 A DE 4039726A DE 4039726 A1 DE4039726 A1 DE 4039726A1
Authority
DE
Germany
Prior art keywords
flushing
control roller
slot
control
outlet
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Withdrawn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
DE19904039726
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 DE19904039726 priority Critical patent/DE4039726A1/en
Publication of DE4039726A1 publication Critical patent/DE4039726A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

The high performance two stroke combustion engine operates with fuel injection. It has two rollers (3,4) of valve units which electronically, mechanically or rotationally alter the cross section of the scavenging port (10) and the outlet port (9). The first control roller (3) rotates to move the channel (5) to adjust the cross-section of the outlet and the second control roller (4) rotates to move the channel (6) to admit air to the cylinder. USE/ADVANTAGE - Control method to improve the efficiency of a two-stroke engine.

Description

Bei der Aufwärtsbewegung des Kolbens 1 wird Luft durch den Membraneinlaß 8 in das Gehäuse 13 gesaugt und gleichzeitig Öl mit dem Saugstrom durch den Anschluß 11 in das Gehäu­ se 13 geliefert. Bei der Abwärtsbewegung des Kolbens 1 wird die Luft im Gehäuse 13 verdichtet und zum Zeitpunkt des Druckabfalls im Zylinder 2 über die Überströmkanäle 7 in den Zylinder 2 gedrückt - der übliche Ablauf wie bei konventionellen 2-Takt-Motoren. Der Kolben 1 bewegt sich zum O. T. Einige Millimeter vor dem O. T. erfolgt die Zündung. Der Kolben 1 erreicht bei der Abwärtsbewegung den Auslaß­ schlitz 9. Die Steuerwalze 3 mit dem Kanal 5 hat inzwischen den ganzen Öffnungsquerschnitt zum Auslaßschlitz 9 herge­ stellt. Der Kolben 1 öffnet den Auslaßschlitz 9 und die ver­ brannten Gase entspannen sich mit noch hohen Druck in den Auslaßtrakt, es entsteht ein Unterdruck im Zylinder 2. Zum Zeitpunkt des Unterdruckbeginns hat die Steuerwalze 4 mit dem Kanal 6 den Spülschlitz 10, der niedriger als der Auslaß­ schlitz 9 liegt, erreicht und geöffnet. Das geringere Höhen­ maß des Spülschlitzes 10 läßt den hohen Öffnungsdruck auf die Steuerwalze 4 nicht wirken. Die Steuerwalze 4 hat den Querschnitt so weit geöffnet, daß der Unterdruck im Zylin­ der 2 Luft in den Zylinder 2 in einem Strömungswinkel von 35° einströmen läßt und noch vorhandene Restgase ausspült. Gleichzeitig strömt die im Gehäuse 13 verdichtete Luft über die diametral angeordneten Überströmkanäle 7 in einem Winkel von 35° nach oben gerichtet, in den Zylinder 2 ein. During the upward movement of the piston 1 , air is sucked through the diaphragm inlet 8 into the housing 13 and at the same time oil is supplied with the suction flow through the connection 11 into the housing 13 . During the downward movement of the piston 1, the air is compressed in the housing 13 and is pressed at the time of the pressure drop in the cylinder 2 through the overflow channels 7 in the cylinder 2 - the usual procedure as in conventional 2-stroke engines. Piston 1 moves to TDC Ignition occurs a few millimeters before TDC. The piston 1 reaches the outlet slot 9 during the downward movement. The control roller 3 with the channel 5 has now the entire opening cross section to the outlet slot 9 Herge provides. The piston 1 opens the outlet slot 9 and the ver burned gases relax with high pressure in the exhaust tract, there is a negative pressure in the cylinder 2nd At the time of the vacuum start, the control roller 4 with the channel 6 has reached the flushing slot 10 , which is lower than the outlet slot 9 , and opened. The lower height measurement of the flushing slot 10 does not allow the high opening pressure to act on the control roller 4 . The control roller 4 has opened the cross-section so far that the negative pressure in the Zylin 2 air can flow into the cylinder 2 in a flow angle of 35 ° and flushes out any remaining gases. At the same time, the air compressed in the housing 13 flows through the diametrically arranged overflow channels 7 at an angle of 35 ° upwards into the cylinder 2 .

Beim Errreichen des U. T. des Kolbens 1 und durch weiter Drehen der Steuerwalze 3 ist der Querschnitt zum Auslaß­ schlitz 9 nur noch halb geöffnet, so daß die Brennstoff-Ein­ spritzung beginnt, die durch die Düse 14 in den Spül­ schlitz 10 erfolgt. Durch weiter Drehen der Steuerwalze 3 wird der Auslaßschlitz 9 geschlossen, so daß bis zum Überlaufen des Spülschlitzes 10 durch den Kolben 1 wei­ ter Luft in den Zylinder 2 einströmen kann. Diese Luft bringt eine zusätzliche Füllung. Die Brennstoff-Einspritzung kann auch über die Düse 12 in den Membraneinlaß 8 erfolgen. Der Kolben 1 bewegt sich zum O. T. und verdichtet des Brenn­ stoffgemisch bis die Zündung erfolgt.When reaching the bottom of the piston 1 and by further turning the control roller 3 , the cross section to the outlet slot 9 is only half open, so that the fuel injection begins, which takes place through the nozzle 14 in the flushing slot 10 . By further rotation of the control roller 3, the exhaust port 9 is closed, so that white ter air can flow into the cylinder 2 to overflowing of the scavenging port 10 by the piston. 1 This air brings an additional filling. The fuel injection can also take place via the nozzle 12 into the membrane inlet 8 . The piston 1 moves to TDC and compresses the fuel mixture until the ignition takes place.

Claims (8)

1. Hochleistungs-2-Takt-Brennkraftmaschine mit Brennstoff­ einspritzung und Steuerwalzen vor dem Spül- und Auslaß­ schlitzen angebracht, um die Spül- und Auslaßquerschnitte elektronisch, mechanisch oder rotierend zu steuern. Da­ durch gekennzeichnet, daß die Steuerwalze 3 und die Steuer­ walze 4 elektronisch, mechanisch oder rotierend die Quer­ schnitte der Spülschlitze 10 oder Auslaßschlitze 9 verän­ dern und daß die Steuerwalze 3 mit dem Kanal 5 durch Drehen den vollen Querschnitt zum Auslaßschlitz 9 freigegeben hat, so daß die mit hohem Druck entspannenden Brenngase den Unter­ druck im Zylinder 2 erzeugen.1. High-performance 2-stroke internal combustion engine with fuel injection and control rollers in front of the flushing and outlet slots to control the flushing and outlet cross sections electronically, mechanically or rotating. Since by in that the control roller 3 and the control roller 4, electronic, mechanical or rotating the transverse sections of the scavenging ports 10 or exhaust ports 9 countries changed and that the control roller has released 3 to the channel 5 by rotating the full cross-section to the outlet port 9 so that the high-pressure fuel gases generate the negative pressure in cylinder 2 . Die Steuerwalze 4 mit dem Kanal 6 hat inzwischen die Ver­ bindung zu den Spülschlitzen 10 hergestellt und der Unter­ druck saugt Luft durch den voll geöffneten Querschnitt in den Zylinder 2 ein.The control roller 4 with the channel 6 has now established the connection to the flushing slots 10 and the vacuum sucks air through the fully open cross section into the cylinder 2 . 2. Nach dem Anspruch 1 noch dadurch gekennzeichnet, daß bis zum Überdecken der Spülschlitze 10 mit dem Kolben 1 Luft in den Zylinder 2 einströmen kann, so daß eine zusätzliche Füllung entsteht.2. According to claim 1, characterized in that up to covering the flushing slots 10 with the piston 1 air can flow into the cylinder 2 , so that an additional filling is formed. 3. Nach den Ansprüchen 1 bis 2 noch dadurch gekennzeichnet, daß die vom Kolben 1 in das Gehäuse 13 eingesaugte und ver­ dichtete Luft über die Überströmkanäle 7 erst bei fast ver­ schlossenem 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 sealed air via the overflow channels 7 is pressed into the cylinder 2 only when the outlet slot 9 is almost closed. 4. Nach den Ansprüchen 1 bis 3 noch dadurch gekennzeichnet, daß die Querschnittsänderungen bei elektronischer Steue­ rung der Steuerwalzen 3 und 4 der Drehzahl entsprechend er­ folgen kann.4. According to claims 1 to 3 still characterized in that the cross-sectional changes in electronic control tion of the control rollers 3 and 4 of the speed accordingly he can follow. 5. Nach den Ansprüchen 1 bis 4 noch dadurch gekennzeichnet, daß die Schlitzhöhe des Spülschlitzes 10 niedriger ist als die des Auslaßschlitzes 9; damit die Steuerwalze 4 beim Öffnen des Auslaßschlitzes 9 durch den Kolben 1 vom hohen Öffnungsdruck entlastet ist. 5. According to claims 1 to 4, characterized in that the slot height of the flushing slot 10 is lower than that of the outlet slot 9 ; so that the control roller 4 is relieved of the high opening pressure by the piston 1 when opening the outlet slot 9 . 6. Nach den Ansprüchen 1 bis 5 noch dadurch gekennzeichnet, daß die Achse der Steuerwalze 4 tiefer gelagert ist als die der Steuerwalze 3, so daß ein Einströmwinkel von 35° nach oben gerichtet, für den Kanal 6 zum Spülschlitz 10 erreicht wird.6. According to claims 1 to 5, characterized in that the axis of the control roller 4 is mounted lower than that of the control roller 3 , so that an inflow angle of 35 ° directed upwards for the channel 6 to the flushing slot 10 is reached. 7. Nach den Ansprüchen 1 bis 6 noch dadurch gekennzeichnet, daß die Einspritzung von Brennstoff über die Düse 14 in den Spülschlitz 10, der über die Düse 12 in den Membranein­ laß 8 erfolgen kann.7. According to claims 1 to 6, characterized in that the injection of fuel via the nozzle 14 into the flushing slot 10 , which can be done via the nozzle 12 in the membrane 8 8 .
DE19904039726 1990-12-13 1990-12-13 Controlling ports of two=stroke engine - involves use of electronically or mechanically operated rollers with internal channels Withdrawn DE4039726A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19904039726 DE4039726A1 (en) 1990-12-13 1990-12-13 Controlling ports of two=stroke engine - involves use of electronically or mechanically operated rollers with internal channels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19904039726 DE4039726A1 (en) 1990-12-13 1990-12-13 Controlling ports of two=stroke engine - involves use of electronically or mechanically operated rollers with internal channels

Publications (1)

Publication Number Publication Date
DE4039726A1 true DE4039726A1 (en) 1991-05-29

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DE19904039726 Withdrawn DE4039726A1 (en) 1990-12-13 1990-12-13 Controlling ports of two=stroke engine - involves use of electronically or mechanically operated rollers with internal channels

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4118254A1 (en) * 1991-06-04 1991-10-31 Kurt Jurack High-power reverse-flow-scavenged two-stroke engine - features supercharging by continued admission of air through diaphragm control to scavenging port before fuel injection
WO1998003050A2 (en) * 1996-07-22 1998-01-29 Evgeny Nikolaevich Zakharov Internal combustion engine with slot-type gas distribution
DE102015224062A1 (en) * 2015-12-02 2017-06-08 Bayerische Motoren Werke Aktiengesellschaft Two-stroke engine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE666717C (en) * 1934-02-21 1938-11-18 Triumph Werke Nuernberg Akt Ge Rotary valve control for internal combustion engines
DE3933234A1 (en) * 1988-10-13 1990-04-19 Volkswagen Ag Two=stroke IC engine with gas inlet in cylinder head - has inlet port preceded by slide valve and at TDC piston position
DE3942032A1 (en) * 1988-12-21 1990-07-05 Fuji Heavy Ind Ltd TWO-STROKE ENGINE
DE3908709A1 (en) * 1988-02-03 1990-09-20 Ind Tech Res Inst AIR INJECTION DEVICE FOR A TWO-STROKE ENGINE

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE666717C (en) * 1934-02-21 1938-11-18 Triumph Werke Nuernberg Akt Ge Rotary valve control for internal combustion engines
DE3908709A1 (en) * 1988-02-03 1990-09-20 Ind Tech Res Inst AIR INJECTION DEVICE FOR A TWO-STROKE ENGINE
DE3933234A1 (en) * 1988-10-13 1990-04-19 Volkswagen Ag Two=stroke IC engine with gas inlet in cylinder head - has inlet port preceded by slide valve and at TDC piston position
DE3942032A1 (en) * 1988-12-21 1990-07-05 Fuji Heavy Ind Ltd TWO-STROKE ENGINE

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4118254A1 (en) * 1991-06-04 1991-10-31 Kurt Jurack High-power reverse-flow-scavenged two-stroke engine - features supercharging by continued admission of air through diaphragm control to scavenging port before fuel injection
WO1998003050A2 (en) * 1996-07-22 1998-01-29 Evgeny Nikolaevich Zakharov Internal combustion engine with slot-type gas distribution
WO1998003050A3 (en) * 1996-07-22 1998-10-29 Evgeny Nikolaevich Zakharov Internal combustion engine with slot-type gas distribution
US6119640A (en) * 1996-07-22 2000-09-19 Zakharov; Evgeny Nikolaevich Internal combustion engine with slot-type gas distribution
DE102015224062A1 (en) * 2015-12-02 2017-06-08 Bayerische Motoren Werke Aktiengesellschaft Two-stroke engine

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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 licenses declared
8130 Withdrawal