DE3011846A1 - Two stroke IC engine - has direct fuel injection after exhaust port has closed - Google Patents

Two stroke IC engine - has direct fuel injection after exhaust port has closed

Info

Publication number
DE3011846A1
DE3011846A1 DE19803011846 DE3011846A DE3011846A1 DE 3011846 A1 DE3011846 A1 DE 3011846A1 DE 19803011846 DE19803011846 DE 19803011846 DE 3011846 A DE3011846 A DE 3011846A DE 3011846 A1 DE3011846 A1 DE 3011846A1
Authority
DE
Germany
Prior art keywords
stroke engine
exhaust port
stroke
fuel
engine according
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Withdrawn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
DE19803011846
Other languages
German (de)
Inventor
Tomas 6000 Frankfurt Klimecky
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 DE19803011846 priority Critical patent/DE3011846A1/en
Publication of DE3011846A1 publication Critical patent/DE3011846A1/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Withdrawn legal-status Critical Current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
    • F02B1/00—Engines characterised by fuel-air mixture compression
    • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
    • F02B1/08—Engines characterised by fuel-air mixture compression with positive ignition with separate admission of air and fuel into cylinder
    • 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
    • F02B75/00—Other engines
    • F02B75/28—Engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders
    • F02B75/282—Engines with two or more pistons reciprocating within same cylinder or within essentially coaxial cylinders the pistons having equal strokes
    • 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
    • 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
    • F02B75/12—Other methods of operation
    • F02B2075/125—Direct injection in the combustion chamber for spark ignition engines, i.e. not in pre-combustion chamber
    • 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

Landscapes

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

Abstract

The two-stroke internal combustion engine has an inlet valve (5), a transfer duct (6) and exhaust port (12). Fuel is supplied by injector (1) directly into the cylinder and ignited by spark plug (2). A throttle (7) and lubricating oil feed (8) are fitted in the inlet duct. Pure air is drawn into the cylinder through the transfer duct (6) and fuel is injected only when the exhaust port (12) has closed. Losses of unburnt mixture to exhaust are prevented and improved fuel economy is obtained.

Description

"Zweitaktmotor mit Direkteinspritzung" Die Erfindung betrifft einen Zweitaktmotor mit Direkteinspritzung m Gegensatz zu den bekannten Zweitaktmotoren1 bei denen Kraftstoff-Luftgemisch in den Brennraum eingesaugt wird, wird bei diesem erfindungsgemäßen Zweitaktmotor nur Luft e@ngesaugt. Der Kraftstoff wird mittels einer Einspritz= düse in den Brennraum eingespritzt."Direct Injection Two-Stroke Engine" The invention relates to one Two-stroke engine with direct injection in contrast to the well-known two-stroke engines1 in which the fuel-air mixture is sucked into the combustion chamber, in this case Two-stroke engine according to the invention only sucked in air. The fuel is by means of an injection nozzle is injected into the combustion chamber.

Bei dem bekannten Verfahren für 7weitakter, nämlich Ansaugen von Kraftstoff-Luftgemisch, entweicht während des Kolbenhubes ein Teil des Gemischs durch den Auspuffkanal, der teilweise noch geöffnet ist Verminderte Leistung bzw. höherer Kraftstoffverbrauch ist die Folge.In the known method for 7-stroke, namely intake of fuel-air mixture, part of the mixture escapes through the exhaust port during the piston stroke, which is partially still open. Reduced performance or higher The result is fuel consumption.

Beim erfindungsgemäßen Zweitakter erfolgt die Einspritzung des Kraftstoffes mittels einer Einspritzdüse erst nach= dem der Auspuffkanal gesperrt ist. Die Luft wird gesondert über den Einlaßkanal zugeführt und durch eine Drossel= klappe geregelt.In the case of the two-stroke engine according to the invention, the fuel is injected by means of an injection nozzle only after the exhaust port is blocked. The air is fed separately via the inlet duct and regulated by a throttle valve.

Da die Einspritzung am entferntesten Punkt vom Auspuff= kanal erfolgt, ist letztere schon geschlossen, bis sich Kraftstoff und Luft in Brennraum ausgedehnt haben. Da= durch, daß keine Kraftstoffgemisch in den Auspuff mitge= rissen werden kann, wird eine erhebliche Menge Kraft= stoff gespart.Since the injection takes place at the most distant point from the exhaust port, the latter is already closed until the fuel and air in the combustion chamber expand to have. This means that no fuel mixture is entrained into the exhaust can save a considerable amount of fuel.

Vorteilhaft bei dem erfindungsgemäßen Motor ist auch, daß die Schmierung des Motores wirksamer ist, denn die Luft die durch das Motorgehäuse strömt, bindet an sich weniger Öl als ein Benzin-Luftgemisch, und damit bleibt das Öl länger un besser an den Lagern haften. Durch die höhere Öldichte an der Kurbelwellenlagern, Pleuellagern und auch an den Zylinderwänden, wird längere Lebensdauer des Motors gewährleistet.Another advantage of the motor according to the invention is that the lubrication of the motor is more effective, because the air flowing through the motor housing binds in itself less oil than a gasoline-air mixture, and so the oil stays undisturbed longer adhere better to the bearings. Due to the higher oil density on the crankshaft bearings, Connecting rod bearings, and also on the cylinder walls, will extend the life of the engine guaranteed.

Anstatt eines Vergasers ist eine Drossel@lappe im Ein= laßkanal vorgesehen. Die Schmierung wird durch eine Düse am Einlaßkanal dosiert.Instead of a carburetor, a throttle valve is provided in the intake duct. The lubrication is metered through a nozzle on the inlet channel.

Die Zeichnung veranschaulicht den erfindungsgemäßen Zwei= taktmotor in beispielsweiser Ausführung. Es zeigen: Fig. 1 einen Längsschnitt von vorn geschen, Fig. 2 einen Längsschnitt vor der Seite geseher.The drawing illustrates the two-stroke engine according to the invention in exemplary execution. They show: FIG. 1 a longitudinal section from the front, Fig. 2 is a longitudinal section seen in front of the page.

Am oberen Ende des Zylinders 4 (Brennkammer) Ist die Ein= spritzdüse l angeordnet sowie die Zündkerze 2. Es können natürlIch auch zwei Einspritzdüsen vorgesehen sein. Der Kolben 3 steht in Fig.1 in Tiefstellung, in Fig.2 be= findet ersich in Hochstellung. 5 ist Einlaßventil, 6 = Überströmkanal. Anstelle eines Vergasers ist im Einlaß= kanal5 eine Drosselklappe 7 vorgesehen, sowie eine Ö1= dosierungsdüse 8. Kurbelgehäuse 9, Kurbelwelle 10, Pleuel 11 und Auspuffkanal 12 entsprechen den bekannten Zweitaktern.At the upper end of cylinder 4 (combustion chamber) is the injection nozzle l and the spark plug 2. It can of course also have two injection nozzles be provided. The piston 3 is in the low position in FIG. 1 and is found in FIG it is in superscript. 5 is the inlet valve, 6 = overflow channel. Instead of a carburetor a throttle valve 7 is provided in the inlet channel 5, as well as an oil 1 metering nozzle 8. Crankcase 9, crankshaft 10, connecting rod 11 and exhaust duct 12 correspond to the well-known two-stroke engines.

Beim T;olbenhub wird nur Luft über den Überströmkanal 6 angesaugt. Erst nachdem der Auspuffkanal # 12 gesperrt St oder auch kurz zuvor, wird Kraftstoff über die Ein= spritzdüse j in den Brennraum 4 eingespritzt und dann mittels der Zündkerze 2 gezündet.During the piston stroke, only air is sucked in via the overflow channel 6. Only after the exhaust port # 12 is blocked St or shortly before that, is fuel injected via the injection nozzle j into the combustion chamber 4 and then by means of the Spark plug 2 ignited.

Der Auspuffkanal 12 ist in der1 Moment, wo sich Kraft= stoff und Luft vermischt und ausgedehnt haben, ge= schlosser. ie Schmierung erfolgt dosiert über die Öl= dosierungsdüse 8. Anstelle eines Vergasers ist eine Drosselklappe 7 im Einströmkanal 5 vorgesehen.The exhaust duct 12 is at the moment where fuel and air are have mixed and expanded, closed. he lubrication takes place in a metered manner the oil = metering nozzle 8. Instead of a carburetor, there is a throttle valve 7 in the inflow channel 5 provided.

L e e r s e i t eL e r s e i t e

Claims (5)

Patentansprüche/Schutzansprüche: 1. Zweitaktmotor, dadurch gekennzeichnet, daß der Kraft= stoff in den Brennraum (4) des Zylinders über eine Ein= spritzdüse (1) oder deren zwei, eingespritzt wird, und über den Überströmkanal (6) nur Luft zugeführt wird, und daß der Auspuffkanal (12) so angeordnet ist, daß er im Moment der Einspritzung vollkommen geschlossen ist.Patent claims / protection claims: 1. Two-stroke engine, characterized in that that the fuel enters the combustion chamber (4) of the cylinder via an injection nozzle (1) or two, is injected, and only air via the overflow channel (6) is supplied, and that the exhaust duct (12) is arranged so that it is at the moment the injection is completely closed. 2.Zweitaktmotor nach Anspruch 1, dadurch gekennzeichnet, daß anstelle eines Vergasers, im Einlaßkanal (5) ene Drosselklappe (7) vorgesehen ist. 2.Zwo-stroke engine according to claim 1, characterized in that instead of a carburetor, a throttle valve (7) is provided in the inlet duct (5). 3.Zweitaktmotor nach den Ansprüchen 1 und 2, dadurch ge= kennzeichnet, daß im Einlaßkanal (5) eine Dosierungsdüse (8) vorgesehen ist, welche die Ölzufuhr dosiert. 3. two-stroke engine according to claims 1 and 2, characterized in = denotes, that in the inlet channel (5) a metering nozzle (8) is provided, which the oil supply dosed. 4.Zweitaktmotor nach den Ansprüchen 1 bis 3, dadalrch gekenn= zeichnet, daß die Einspritzdüse (1) oder deren zwei, an oberster Stelle des Brennraumes (4) angeordnet ist. 4. two-stroke engine according to claims 1 to 3, marked dadalrch = characterized, that the injection nozzle (1) or two of them, at the top of the combustion chamber (4) is arranged. 5.Zweitaktmotor nach den Ansprüchen 1 bis 4, dadurch ge= kennzeichnet, daß das Schmieröl nur zusammen mit der Luft eingeführt und so besser an diU Schmierstellen 5.Zwo-stroke engine according to claims 1 to 4, characterized in that the lubricating oil is only introduced together with the air and so better at diU lubrication points
DE19803011846 1980-03-27 1980-03-27 Two stroke IC engine - has direct fuel injection after exhaust port has closed Withdrawn DE3011846A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19803011846 DE3011846A1 (en) 1980-03-27 1980-03-27 Two stroke IC engine - has direct fuel injection after exhaust port has closed

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803011846 DE3011846A1 (en) 1980-03-27 1980-03-27 Two stroke IC engine - has direct fuel injection after exhaust port has closed

Publications (1)

Publication Number Publication Date
DE3011846A1 true DE3011846A1 (en) 1981-10-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE19803011846 Withdrawn DE3011846A1 (en) 1980-03-27 1980-03-27 Two stroke IC engine - has direct fuel injection after exhaust port has closed

Country Status (1)

Country Link
DE (1) DE3011846A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1010874A1 (en) * 1998-12-15 2000-06-21 Tanaka Kogyo Co., Ltd. Two-cycle engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1010874A1 (en) * 1998-12-15 2000-06-21 Tanaka Kogyo Co., Ltd. Two-cycle engine

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