DE917758C - Air-cooled internal combustion engine with cooling fan and an ejector operated by the exhaust gases to convey the cooling air - Google Patents
Air-cooled internal combustion engine with cooling fan and an ejector operated by the exhaust gases to convey the cooling airInfo
- Publication number
- DE917758C DE917758C DEP8367D DEP0008367D DE917758C DE 917758 C DE917758 C DE 917758C DE P8367 D DEP8367 D DE P8367D DE P0008367 D DEP0008367 D DE P0008367D DE 917758 C DE917758 C DE 917758C
- Authority
- DE
- Germany
- Prior art keywords
- air
- ejector
- internal combustion
- combustion engine
- cooling
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
- F01P5/08—Use of engine exhaust gases for pumping cooling-air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
- F01P5/04—Pump-driving arrangements
Description
Die Erfindung betrifft eine luftgekühlte Brennkraftmaschine mit Kühlgebläse und einem von den Auspuffgasen betriebenen Ejektor zur Förderung der Kühlluft.The invention relates to an air-cooled internal combustion engine with a cooling fan and an ejector operated by the exhaust gases to convey the cooling air.
Es ist bekannt, zur Förderung der Kühlluft die Energie der Auspuffgase mit Hilfe eines Ejektors auszunutzen. Dies geschah bisher in der Weise, daß ein größerer Anteil der Kühlluft durch den Ejektor geleitet wurde. Dies ist jedoch nachteilig, weil die Kühlluftmenge und die Menge der Auspuffgase im Hinblick auf einen guten Wirkungsgrad des Ejektors in einem ungünstigen Verhältnis zueinander stehen.It is known to use the energy of the exhaust gases to promote the cooling air with the help of an ejector. So far this has been done in such a way that a a larger proportion of the cooling air was passed through the ejector. However, this is disadvantageous because the amount of cooling air and the amount of exhaust gases in terms of good Efficiency of the ejector are in an unfavorable relationship to each other.
Die Erfindung bezweckt, den bestehenden Nachteil zu beseitigen. Dies wird dadurch erreicht, daß die durch den Ejektor geförderte Kühlluft nur die heißesten Teile des Zylinders, z. B. die Partie des Zylinderkopfes oder bei Zweitaktbrennkraftmaschinen die Partie der Auspuffkanäle, kühlt. Der Wirkungsgrad eines Ejektors ist am besten, wenn die angesaugte Luftmenge etwa gleich der Abgasmenge ist. Diesem Verhältnis kommt die Erfindung sehr nahe. Darüber hinaus besteht der Vorteil, daß das Kühlgebläse kleiner bemessen werden kann, weil es nicht für die Belastungsspitze bemessen zu werden braucht. Die Belastungsspitze übernimmt der Ejektor. Seine Wirkung ist dazu noch leistungsabhängig, was sehr vorteilhaft ist.The invention aims to eliminate the existing disadvantage. this is achieved in that the cooling air conveyed through the ejector is only the hottest Parts of the cylinder, e.g. B. the part of the cylinder head or in two-stroke internal combustion engines the part of the exhaust ducts, cools. The efficiency of an ejector is best when the amount of air drawn in is approximately equal to the amount of exhaust gas. This relationship the invention comes very close. In addition, there is the advantage that the cooling fan Can be sized smaller because it is not sized for the peak load needs to be. The ejector takes on the peak load. Its effect is about it still performance-dependent, which is very beneficial.
In der Zeichnung ist eine Ausführungsform der Erfindung beispielsweise schematisch dargestellt. Die Abb. i zeigt einen senkrechten Längsschnitt durch den Zylinder einer schlitzgesteuerten luftgekühlten Zweitaktbrennkraftmaschine.In the drawing, an embodiment of the invention is for example shown schematically. Fig. I shows a vertical longitudinal section through the Cylinder of a slot-controlled air-cooled two-stroke internal combustion engine.
Die Abb. 2 ist ein Schnitt nach der Linie 11-II der Abb. i.Fig. 2 is a section along the line 11-II of Fig. I.
In den Abbildungen ist der Zylinder mit i bezeichnet; 2 ist der Kolben. 3 sind die in der Zylinderwand befindlichen, vom Kolben 2 gesteuerten Einlaßkanäle. Die ebenfalls in der Zylinderwand befindlichen, vom Kolben 2 gesteuerten Auslaßkanäle sind in einen Vorauslaßkanal4 und in Hauptauslaßkanäle 5 unterteilt. Die Hauptauslaßkanäle 5 führen einfach ins Freie in eine Auspuffleitung. 6 ist der Zylinderkopf. Die Kühlung der Brennkraftmaschine erfolgt in bekannter Weise durch ein Kühlgebläse, welches seine Kühlluft durch eine Eintrittsöffnung 7 in die Kühlluftverkleidung 8 für Zylinder und Zylinderkopf hineinbläst. An den Vorauslaßkanal4 ist ein Ejektor9 angeschlossen, der nur dazu dient, den heißesten Teil der Maschine, nämlich die Partie der Auslaßkanäle, zu kühlen. Zu diesem Zweck ist oberhalb des Ejektors eine besondere Kühlluftleitwand io angeordnet. An den Ejektor 9 schließt die Auspuffleitung ii an, die einen Schalldämpfer 12 enthält.In the figures, the cylinder is denoted by i; 2 is the piston. 3 are the inlet channels located in the cylinder wall and controlled by the piston 2. The exhaust channels, which are also located in the cylinder wall and controlled by the piston 2 are subdivided into a pre-outlet channel 4 and main outlet channels 5. The main exhaust ducts 5 simply lead outside into an exhaust pipe. 6 is the cylinder head. The cooling the internal combustion engine takes place in a known manner by a cooling fan, which its cooling air through an inlet opening 7 in the cooling air cladding 8 for cylinders and blows the cylinder head into it. An ejector9 is connected to the discharge duct4, which only serves to open the hottest part of the machine, namely the section of the exhaust ducts, to cool. For this purpose there is a special cooling air baffle above the ejector io arranged. The ejector 9 is followed by the exhaust line ii, which has a silencer 12 contains.
Es ist nicht unbedingt notwendig, daß die Auslaßkanäle in Vorauslaß- und Hauptauslaßkanäle unterteilt sind; jedoch ist eine Unterteilung in Vor-und Hauptauslaßka,näle besonders zweckmäßig, weil dann nur die wirklich Arbeit leistenden Auspuffgase in den Ej ektor geleitet werden.It is not absolutely necessary that the outlet channels in the outlet and main exhaust passages are divided; however, there is a subdivision into inlet and main outlet channels especially useful, because then only the exhaust gases that really work are in be directed to the ejector.
In gewissen Fällen, z. B. bei Talfahrten, kann es günstig sein, die Förderung der Kühlluft durch den Ejektor abzuschalten. Der Ejektor ist daher in zweckmäßiger Weise mit einer Einrichtung zu versehen, die dies gestattet. Eine solche Einrichtung wäre z. B. eine verschiebbare Hülse, durch die die öffnungen 13 im Saugstutzen kurz hinter der Ejektordüse geöffnet oder geschlossen werden können.In certain cases, e.g. B. when going downhill, it can be beneficial to turn off the cooling air delivery through the ejector. The ejector is therefore to be provided in an expedient manner with a device that allows this. Such a facility would be e.g. B. a displaceable sleeve through which the openings 13 in the suction nozzle can be opened or closed shortly after the ejector nozzle.
Die Erfindung ist nicht auf schlitzgesteuerte luftgekühlte Zweitaktb.rennkraftmaschinen beschränkt, sondern sie kann auch bei ventilgesteuerten Zweitakt- und bei Viertaktbrennkraftmaschinen angewandt werden, bei denen in der Regel der Zylinderkopf der heißeste Teil der Maschine ist. Die Kühlluftführung muß daher so ausgebildet werden, daß der Ejektor nur dazu dient, die Partie des Zylinderkopfes zu kühlen.The invention is not directed to slot-controlled air-cooled two-stroke racing engines limited, but it can also be used in valve-controlled two-stroke and four-stroke internal combustion engines be applied, where usually the cylinder head is the hottest part of the Machine is. The cooling air duct must therefore be designed so that the ejector only serves to cool the part of the cylinder head.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP8367D DE917758C (en) | 1948-10-02 | 1948-10-02 | Air-cooled internal combustion engine with cooling fan and an ejector operated by the exhaust gases to convey the cooling air |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP8367D DE917758C (en) | 1948-10-02 | 1948-10-02 | Air-cooled internal combustion engine with cooling fan and an ejector operated by the exhaust gases to convey the cooling air |
Publications (1)
Publication Number | Publication Date |
---|---|
DE917758C true DE917758C (en) | 1954-09-09 |
Family
ID=7361688
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEP8367D Expired DE917758C (en) | 1948-10-02 | 1948-10-02 | Air-cooled internal combustion engine with cooling fan and an ejector operated by the exhaust gases to convey the cooling air |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE917758C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE959335C (en) * | 1955-09-11 | 1957-03-07 | Porsche Kg | Air-cooled four-stroke internal combustion engine for driving vehicles by means of a speed change gear |
DE1108514B (en) * | 1959-07-18 | 1961-06-08 | Kloeckner Humboldt Deutz Ag | Air-cooled internal combustion engine |
EP0313763A1 (en) * | 1987-10-28 | 1989-05-03 | Deere & Company | Agricultural vehicle having a rotary screen air filter |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR764817A (en) * | 1933-02-21 | 1934-05-29 | Const Mecaniques L Aster Atel | Process for the recovery of part of the energy from the exhaust gases of internal combustion engines and engines, comprising application |
FR770483A (en) * | 1933-05-11 | 1934-09-14 | Fairey Aviat Co Ltd | Improvements to air cooling of internal combustion engines |
DE724536C (en) * | 1940-01-30 | 1942-08-28 | Bmw Flugmotorenbau Ges M B H | For regulating the air throughput in cladding for components to be cooled device serving, especially in cooling systems of internal combustion engines in aircraft |
DE739114C (en) * | 1941-04-24 | 1943-09-11 | Argus Motoren Ges M B H | Cooling device for air-cooled internal combustion engines with an in-line arrangement of the cylinders |
GB567173A (en) * | 1943-11-02 | 1945-01-31 | John Hereward Pitchford | Improvements in or relating to cooling systems for internal combustion engines |
-
1948
- 1948-10-02 DE DEP8367D patent/DE917758C/en not_active Expired
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR764817A (en) * | 1933-02-21 | 1934-05-29 | Const Mecaniques L Aster Atel | Process for the recovery of part of the energy from the exhaust gases of internal combustion engines and engines, comprising application |
FR770483A (en) * | 1933-05-11 | 1934-09-14 | Fairey Aviat Co Ltd | Improvements to air cooling of internal combustion engines |
DE724536C (en) * | 1940-01-30 | 1942-08-28 | Bmw Flugmotorenbau Ges M B H | For regulating the air throughput in cladding for components to be cooled device serving, especially in cooling systems of internal combustion engines in aircraft |
DE739114C (en) * | 1941-04-24 | 1943-09-11 | Argus Motoren Ges M B H | Cooling device for air-cooled internal combustion engines with an in-line arrangement of the cylinders |
GB567173A (en) * | 1943-11-02 | 1945-01-31 | John Hereward Pitchford | Improvements in or relating to cooling systems for internal combustion engines |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE959335C (en) * | 1955-09-11 | 1957-03-07 | Porsche Kg | Air-cooled four-stroke internal combustion engine for driving vehicles by means of a speed change gear |
DE1108514B (en) * | 1959-07-18 | 1961-06-08 | Kloeckner Humboldt Deutz Ag | Air-cooled internal combustion engine |
EP0313763A1 (en) * | 1987-10-28 | 1989-05-03 | Deere & Company | Agricultural vehicle having a rotary screen air filter |
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