DE1931319A1 - Supercharged two-stroke internal combustion engine - Google Patents
Supercharged two-stroke internal combustion engineInfo
- Publication number
- DE1931319A1 DE1931319A1 DE19691931319 DE1931319A DE1931319A1 DE 1931319 A1 DE1931319 A1 DE 1931319A1 DE 19691931319 DE19691931319 DE 19691931319 DE 1931319 A DE1931319 A DE 1931319A DE 1931319 A1 DE1931319 A1 DE 1931319A1
- Authority
- DE
- Germany
- Prior art keywords
- internal combustion
- combustion engine
- stroke internal
- supercharged
- pumps
- 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.)
- Pending
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
- F02B33/00—Engines characterised by provision of pumps for charging or scavenging
- F02B33/02—Engines with reciprocating-piston pumps; Engines with crankcase pumps
- F02B33/06—Engines with reciprocating-piston pumps; Engines with crankcase pumps with reciprocating-piston pumps other than simple crankcase pumps
- F02B33/10—Engines with reciprocating-piston pumps; Engines with crankcase pumps with reciprocating-piston pumps other than simple crankcase pumps with the pumping cylinder situated between working cylinder and crankcase, or with the pumping cylinder surrounding working cylinder
- F02B33/12—Engines with reciprocating-piston pumps; Engines with crankcase pumps with reciprocating-piston pumps other than simple crankcase pumps with the pumping cylinder situated between working cylinder and crankcase, or with the pumping cylinder surrounding working cylinder the rear face of working piston acting as pumping member and co-operating with a pumping chamber isolated from crankcase, the connecting-rod passing through the chamber and co-operating with movable isolating member
-
- 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
- F02B33/44—Passages conducting the charge from the pump to the engine inlet, e.g. reservoirs
-
- 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
- F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
- F02B37/04—Engines with exhaust drive and other drive of pumps, e.g. with exhaust-driven pump and mechanically-driven second pump
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supercharger (AREA)
- Reciprocating Pumps (AREA)
Description
Maschinenfabrik Augsburg-Nürnberg, Aktiengesellschaft 89 Augsburg, Stadtbachstraße 1Maschinenfabrik Augsburg-Nürnberg, public limited company 89 Augsburg, Stadtbachstrasse 1
P. B. 2526 Augsburg, den 18. Juni 1969P. B. 2526 Augsburg, June 18, 1969
Aufgeladene Zweitakt-BrennkraftmaschineSupercharged two-stroke internal combustion engine
Die Erfindung betrifft eine aufgeladene Zweitakt-Brennkraftmaschine mit von Abgasturbinen angetriebenen Auflade gebläsen und als Pumpen ausgebildeten Kolbenunterseiten, welche zusätzlich Spül- und Verbrennungsluft im unteren Lastbereich in die Druckleitung des Aufladegebläses über einen Injektor fördern.The invention relates to a supercharged two-stroke internal combustion engine with superchargers powered by exhaust gas turbines and as pumps trained piston undersides, which additional rinsing and combustion air In the lower load range, pump into the pressure line of the supercharger via an injector.
Bei Zweitakt-Dieselmotoren mit Abgasturboaufladung reicht bekanntlich im oberen Lastbereich des Motors die Abgasenergie aus, um über die Aufladegruppe ausreichend Spülluft zuzuführen. Bei Teillast und vor allem beim Starten und beim Beschleunigen des Motors steht dagegen nur relativ wenig Abgasenergie zur Verfügung, so daß zusätzliche Spülluftpumpen eingesetzt werden müssen, die parallel zu den Aufladegruppen Luft fördern.In two-stroke diesel engines with exhaust gas turbocharging, it is known that in the upper load range of the engine the exhaust gas energy is sufficient to supply sufficient scavenging air via the charging group. At part load and especially when starting and accelerating the engine, on the other hand, only relatively little exhaust gas energy is available, so that additional scavenging air pumps must be used, which convey air parallel to the charging groups.
Bei einer bekannten Aueführung werden dabei die Unterseiten der Arbeitskolben zur Förderung von Spülluft herangezogen. Bei der Förderung von Turbogebläse und Kolbenpumpen in einen gemeinsamen Aufnehmer besteht jedoch die Gefahr des sogenannten Pumpe ns des Gebläses, wenn - in Abhängigkeit von der zur Verfügung stehenden Antriebs energie -eine Instabilität in der Förderung des Gebläses auftritt. Dieser Zustand wird bei bekannten Augführungen dadurch vermieden, daß die von den Kolbenpumpen geförderte Luft über Düsen in den Aufnehmer nach dem Gebläse geleitet wird, wodurch eine Injekterwirkung entsteht, oder ee In a known design , the undersides of the working pistons are used to convey scavenging air. When the turbo blower and piston pumps are conveyed in a common transducer, however, there is the risk of the so-called pump ns of the blower if - depending on the available drive energy - an instability occurs in the conveyance of the blower. In known designs, this condition is avoided in that the air conveyed by the piston pumps is passed through nozzles into the transducer after the blower, which creates an injector effect, or ee
009882/0934009882/0934
kann die Luft über besondere Düsen direkt dem Gebläse zugeführt werden, so daß dessen Energiebilanz entsprechend geändert wird.the air can be fed directly to the blower via special nozzles so that its energy balance is changed accordingly.
Demzufolge ist es erwünscht, beim Starten und Beschleunigen möglichst viel zusätzliche Luft von den Kolbenpumpen zu erhalten, wogegen im höheren Lästbereich dieser Luftanteil gering sein oder ganz entfallen kann, was sich wegen der wegfallenden Kompressionsarbeit günstig auf den Kraftstoffverbrauch auswirkt. Um dies zu ermöglichen, hat man bei den bekannten Ausführungen bisher einen Kompromiß gewählt und nur einen Teil der Kolbenunterseiten als Spülluftpumpen eingesetzt, so daß einerseits die Luftversorgung des Motors beim Starten und Beschleunigen ausreichend war, andererseits der Kraftstoffverbrauch bei Betriebslast nicht sehr vergrößert wurde.Accordingly, it is desirable to start and accelerate as much as possible To get a lot of additional air from the piston pumps, whereas in the higher load area this air portion is small or completely eliminated can, which has a favorable effect on fuel consumption because of the lack of compression work. To make this possible, has a compromise has so far been chosen in the known designs and only some of the piston undersides are used as scavenging air pumps, so that on the one hand the air supply to the engine when starting and acceleration was sufficient, on the other hand the fuel consumption was not increased much under operating load.
Um der Kurbelwelle bei höherer Belastung nicht unnötig Leistung zu entziehen, wurde dabei in Abhängigkeit vom Spülluftdruck die Unterbrechung der Förderung der Kolbenunterseitenpumpen bewirkt, indem die Luft auf der Druckseite ins Freie abgeblasen wurde.In order not to unnecessarily increase the power of the crankshaft under higher loads withdrawn, the interruption was depending on the purge air pressure the delivery of the piston bottom pumps caused by the air on the pressure side was blown out into the open.
Demgegenüber wird nach der Erfindung bei einer aufgeladenen Brennkraftmaschine der eingangs erwähnten Art vorgeschlagen, alle oder einen Teil der Ansaugöffnungen der Unterseitenpumpen durch eine gemeinsame Leitung zu verbinden und verschließbar auszubilden. Vorteilhafterweise ist zu diesem Zweck am freien Ende eine z. B. in Abhängigkeit vom Ladedruck steuerbare Klappe vorgesehen. Durch diese Maßnahme werden die bei den bisher bekannten Ausführungen vorhandenen Strömungsverluste wesentlich verringert. In weiterer Ausbildung der Erfindung werden zum Abschalten der Unterseitenpumpen zusätzlich deren Saugventile offen gehalten. Die beim Aufwärtsgang des Kolbens angesaugte LuftIn contrast, according to the invention, in a supercharged internal combustion engine Proposed of the type mentioned, all or part of the suction openings of the underside pumps by a to connect common line and to train lockable. Advantageously is for this purpose at the free end a z. B. provided depending on the boost pressure controllable flap. By this measure significantly reduces the flow losses that exist in the previously known designs. In further Embodiment of the invention, the suction valves are also kept open to switch off the underside pumps. The one when going up air sucked in by the piston
009882/0936009882/0936
strömt dann wieder in den Ansaugraum zurück. Durch die Kurbelversetzung bei Mehrzylindermotoren ergeben sich dann im gemeinsamen Ansaugraum der Unterseiten relativ kleine Druckschwankungen und auch kurze Strömungswege der Luft, so daß die auftretenden Verluste klein s ind. Das öffnen der Ansaugventile kann dabei hydraulisch erfolgen über einen an Ventilteller angeordneten, mit Drucköl beaufschlagten Kolben.then flows back into the suction chamber. Through the crank offset in the case of multi-cylinder engines, there are relatively small pressure fluctuations in the common intake chamber on the underside, and also short air flow paths, so that the losses that occur are small. The suction valves can be opened hydraulically A pressurized oil is applied via a valve plate arranged on the valve plate Pistons.
In der Zeichnung ist als Ausführungsbeispiel der Erfindung eine aufgeladene Zweitaktmaschine schematisch dargestellt.In the drawing, an embodiment of the invention is a charged one Two-stroke machine shown schematically.
Die Verbrennungsgase in den Zylindern 1 der beispielsweise dargestellten 3eZylinder»Zweitakt-Brennkraftmaschine werden nach dem Arbeitshub in bekannter Weise durch die Kolben 2 abwechselnd in die Auspuffleitung 3 ausgeschoben, die mit einer Abgasturbine 4 verbunden ist. Von letzterer wird ein Aufladegebläse 5 angetrieben, das Spül- und Ladeluft über die Spülluftleitung 6 in die Zylinder 1 fördert. Die Unterseiten der Kolben 2 sind in ebenfalls bekannter Weise als Kolben» pumpen ausgebildet und liefern bei niederer Belastung zusätzlich Spülluft. Diese wird über eine Ansaugleitung 8, welche alle Ansaugöffnungen der Kolbenunterseiten miteinander verbinde^ angesaugt, und zwar über die Saugventile 9· Beim Abwärtshub der Kolben 2 wird die Luft über die Druckventile 10 in eine Sammelleitung 11 gefördert, welche in einer Injektordüse 12 innerhalb der Spülluftleitung 6 endet. Zwecks Ab· schalten der Kolbenunterseiten ist am Anfang der Ansaugleitung 8 eine Klappe 13 vorgesehen, die beispielsweise in Abhängigkeit vom steigen· den Ladedruck in der Spülluftleitung 6 nach dem Aufladegebläse 5 geschlos« sen wird. Gegebenenfalls kann die Ansaugleitung 8 in der Länge auch unterteilt sein, um nur einen Teil der Unterseitenpumpen abzuschalten.The combustion gases in the cylinders 1 of the example shown 3e cylinder »two-stroke internal combustion engine are after The working stroke is pushed out in a known manner by the pistons 2 alternately into the exhaust line 3, which is connected to an exhaust gas turbine 4 is. A charging fan 5 is driven by the latter, the flushing and conveys charge air into the cylinder 1 via the scavenging air line 6. the Undersides of the pistons 2 are also known as pistons » pumps and provide additional purge air when the load is low. This is via a suction line 8, which all suction openings the piston undersides connect ^ sucked in via the suction valves 9 · During the downward stroke of the piston 2, the air Conveyed via the pressure valves 10 into a collecting line 11, which ends in an injector nozzle 12 within the purge air line 6. For the purpose of switch the piston underside, a flap 13 is provided at the beginning of the suction line 8, which, for example, increases depending on the the boost pressure in the purge air line 6 after the supercharger 5 closed « will sen. If necessary, the suction line 8 can also be subdivided in length to turn off only part of the bottom pumps.
Die Erfindung ist nicht auf das gezeigte Ausführungsbeispiel beschränkt. ·The invention is not restricted to the exemplary embodiment shown. ·
009882/0934009882/0934
Claims (3)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19691931319 DE1931319A1 (en) | 1969-06-20 | 1969-06-20 | Supercharged two-stroke internal combustion engine |
ES380419A ES380419A1 (en) | 1969-06-20 | 1970-06-04 | Two-time internal combustión motor with overload. (Machine-translation by Google Translate, not legally binding) |
CH910270A CH511368A (en) | 1969-06-20 | 1970-06-16 | Supercharged two-stroke internal combustion engine |
BE752080D BE752080A (en) | 1969-06-20 | 1970-06-16 | SUPERCHARGED TWO STROKE COMBUSTION ENGINE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19691931319 DE1931319A1 (en) | 1969-06-20 | 1969-06-20 | Supercharged two-stroke internal combustion engine |
Publications (1)
Publication Number | Publication Date |
---|---|
DE1931319A1 true DE1931319A1 (en) | 1971-01-07 |
Family
ID=5737529
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19691931319 Pending DE1931319A1 (en) | 1969-06-20 | 1969-06-20 | Supercharged two-stroke internal combustion engine |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE752080A (en) |
CH (1) | CH511368A (en) |
DE (1) | DE1931319A1 (en) |
ES (1) | ES380419A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2325814A1 (en) * | 1975-09-26 | 1977-04-22 | Maschf Augsburg Nuernberg Ag | SUPERCHARGED INTERNAL COMBUSTION ENGINE |
DE3318179A1 (en) * | 1983-05-19 | 1984-05-30 | Dieter 3430 Witzenhausen Kull | Engine block, ribbed piston with displaceable bearing base, piston ring with spring and leaf valves (intake and pressure valve) |
-
1969
- 1969-06-20 DE DE19691931319 patent/DE1931319A1/en active Pending
-
1970
- 1970-06-04 ES ES380419A patent/ES380419A1/en not_active Expired
- 1970-06-16 BE BE752080D patent/BE752080A/en unknown
- 1970-06-16 CH CH910270A patent/CH511368A/en not_active IP Right Cessation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2325814A1 (en) * | 1975-09-26 | 1977-04-22 | Maschf Augsburg Nuernberg Ag | SUPERCHARGED INTERNAL COMBUSTION ENGINE |
DE3318179A1 (en) * | 1983-05-19 | 1984-05-30 | Dieter 3430 Witzenhausen Kull | Engine block, ribbed piston with displaceable bearing base, piston ring with spring and leaf valves (intake and pressure valve) |
Also Published As
Publication number | Publication date |
---|---|
CH511368A (en) | 1971-08-15 |
ES380419A1 (en) | 1972-09-01 |
BE752080A (en) | 1970-12-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE102010022232B4 (en) | Double compression and double expansion processes using internal combustion engine | |
DE10154947B4 (en) | Rechargeable internal combustion engine with variable displacement | |
DE60018609T2 (en) | Piston engine with balancing and charging | |
DE10394147T5 (en) | Air and fuel supply system for an internal combustion engine | |
GB2410060A (en) | A two-stroke compression-ignition internal combustion engine | |
DE102011077148A1 (en) | Heavy oil operated internal combustion engine for e.g. passenger car, has cylinders whose exhaust gas is delivered to inlet side of engine via pump, where cylinders are equipped with low-sulfur fuel appropriate for exhaust gas recirculation | |
AT6341U1 (en) | METHOD FOR OPERATING A MULTI-CYLINDER INTERNAL COMBUSTION ENGINE | |
DE1931319A1 (en) | Supercharged two-stroke internal combustion engine | |
DE3526665C2 (en) | ||
DE102014006032A1 (en) | Method for operating an internal combustion engine | |
DE2630284A1 (en) | COMBUSTION MACHINERY | |
DE665315C (en) | Internal combustion engine for working at different altitudes | |
WO2007028545A1 (en) | Internal combustion engine | |
DE4128642A1 (en) | Turbocharged diesel engine with stepped gearing to compressor - allows variation in speed of crankshaft-driven displacement compressor adjusted automatically in accordance with engine temp. | |
DE3437302A1 (en) | Two-stroke internal combustion engine with supercharging and secondary expansion, especially for motor vehicles | |
DE102013108868A1 (en) | Internal combustion engine | |
DE504909C (en) | Internal combustion engine with a compressor for flushing and charging and a second compressor for overloading | |
DE849935C (en) | High-performance internal combustion engine | |
DE4036537C1 (en) | IC engine toxics reduction system - involves mixing off-gas from previous cycle to fresh air content | |
DE2838952C2 (en) | Internal combustion engine with several cylinders | |
DE19719663C2 (en) | Diesel engine with or without supercharging (four-stroke diesel engine with or without supercharging | |
DE102023121157A1 (en) | ENGINE SYSTEM DESIGNED TO COLLECT UNBURNED HYDROCARBONS (HC) FROM THE EXHAUST DUCT | |
DE10235134A1 (en) | Two-stroke internal combustion engine with charging system has second outlet channel connected to cylinder to link it to exhaust behind turbine | |
AT3207U1 (en) | METHOD FOR CARRYING OUT AN INTERNAL EXHAUST GAS RECIRCULATION INTO THE COMBUSTION CHAMBER OF AN INTERNAL COMBUSTION ENGINE | |
DE936781C (en) | Propellant gas generator for internal combustion turbines |