DE818596C - Self-loading injection pump for internal combustion engines - Google Patents
Self-loading injection pump for internal combustion enginesInfo
- Publication number
- DE818596C DE818596C DEW575A DEW0000575A DE818596C DE 818596 C DE818596 C DE 818596C DE W575 A DEW575 A DE W575A DE W0000575 A DEW0000575 A DE W0000575A DE 818596 C DE818596 C DE 818596C
- Authority
- DE
- Germany
- Prior art keywords
- cylinder
- piston
- pump
- bore
- pump 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.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M49/00—Fuel-injection apparatus in which injection pumps are driven or injectors are actuated, by the pressure in engine working cylinders, or by impact of engine working piston
- F02M49/02—Fuel-injection apparatus in which injection pumps are driven or injectors are actuated, by the pressure in engine working cylinders, or by impact of engine working piston using the cylinder pressure, e.g. compression end pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
- F02M59/107—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive pneumatic drive, e.g. crankcase pressure drive
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
- F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
- F02M2700/13—Special devices for making an explosive mixture; Fuel pumps
- F02M2700/1317—Fuel pumpo for internal combustion engines
- F02M2700/1341—Fuel pump driven by the differential pressure of a gas
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
Description
Selbstlade-Einspritzpumpe für Brennkraftmaschinen Die Erfindung bezieht sich auf Einspritzbrennkraftmaschinen mit einer durch den Druck im Verdichtungsraum angetriebenen Einspritzpumpe. Während bei den bekannten Ausbildungen dieser Einspritzpumpen nur eine Pumpenkammer vorgesehen ist, aus welcher der Brennstoff durch Verschieben des Pumpenkolbens einfach ausgetrieben wird, sind nach der Erfindung zwei Pumpenkammern angeordnet, in denen der Brennstoff stufenweise vorverdichtet wird. Es ist also nach der Erfindung der Pumpenzylinder mit zwei Zylinderkammern versehen, wobei diesen ein einheitlicher Doppelkolben zugeordnet und die eine Zylinderkammer an die Brennstoffzuleitung und der andere an den Verdichtungsraum angeschlossen ist unter Anordnung eines Rückschlagventils zwischen den beiden Kammern. Die Kammern sind dabei unterschiedlich bemessdn, so daß also beim Übergang des in der ersten Kammer angesaugten Brennstoffes in die zweite Kammer bereits eine Vorverdichtung eintritt. Zweckmäßig .ist die Vorverdichtungskammer in den Kolben verlegt, der dann als Einscheibenkolben mit der Kammerbohrung auf einem Achszapfen des Pumpenzylinders geführt ist. Der Pumpenkolben kann gegebenenfalls noch durch eine Rückholfeder belastet sein, deren Spannung auch einstellbar sein kann.Self-charging injection pump for internal combustion engines The invention relates on injection internal combustion engines with one due to the pressure in the compression chamber driven injection pump. While in the known designs of these injection pumps only one pump chamber is provided, from which the fuel is displaced of the pump piston is simply driven out, two pump chambers are according to the invention arranged in which the fuel is precompressed in stages. So it is according to the invention of the pump cylinder provided with two cylinder chambers, these a single double piston is assigned and one cylinder chamber is connected to the fuel supply line and the other is connected to the compression chamber with the arrangement of a check valve between the two chambers. The chambers are dimensioned differently, see above that so when the fuel sucked into the first chamber passes into the second chamber already precompression occurs. The pre-compression chamber is useful relocated to the piston, which then appears as a single-disc piston with the chamber bore is guided on an axle journal of the pump cylinder. The pump piston can optionally still be loaded by a return spring, the tension of which can also be adjusted can.
Durch den Ausschieb- und Kompressionshub des Maschinenkolbens wird der Pumpenkolben in die eine Endstellung herschoben urtd saugt dabei aus der Zufuhrleitung in die erste Kammer die erforderliche Menge an Brennstoff an. Durch den folgenden Saughub des Maschinenkolbens wird, der Pumpenkolben in die andere Endstellung verbrcht und drückt dabei die zuvor in die erste Kammer angesaugte Brennstoffmenge unter einer Vorverdichtung in die zweite Kammer, aus welcher sie dann mit dem Kompressionshub in den Zylinder eingespritzt wird. Es entfällt somit jeder mechanische Antrieb der Pumpe.As a result of the push-out and compression stroke of the machine piston, the pump piston is pushed into the one end position and thereby sucks in the required amount of fuel from the supply line into the first chamber. The pump piston is determined by the following intake stroke of the engine piston, verbrcht in the other end position and presses the previously sucked into the first chamber amount of fuel under a pre-compression in the second chamber from which it is then injected at the compression stroke in the cylinder. There is therefore no need for any mechanical drive for the pump.
Die neue Ausbildung ist nachstehend an Hand der schematisch gehaltenen Darstellung näher erläutert, die die beiden Endstellungen des Pumpenkolbens wiedergibt.The new training is shown below on the basis of the schematic Representation explained in more detail, which reproduces the two end positions of the pump piston.
In einem Zylindergehäuse i, das einen Teil eines Zylinderkopfes einer Brennkraftmaschine bilden kann, oder nach dem Beispiel mit einem Stutzen 2 auf die Einspritzbohrung eines Maschinenzylinders aufgeschraubt sein kann, ist ein Kolben 3 verschiebbar aufgenommen, der durch eine Kolbenstange 4 mit einer Führungsscheibe 5 verbunden ist. Der Pumpenzylinder i ist durch einen Innenflansch 6 in eine den Kolben 3 aufnehmende Ansaugkammer 7 und einen Führungsraum 8 für die Scheibe 5 unterteilt, wobei der Raum 8 einen Teil des Inhalts des Maschinenzylinders bildet.In a cylinder housing i, which is part of a cylinder head a Internal combustion engine can form, or according to the example with a nozzle 2 on the The injection bore of a machine cylinder can be screwed on is a piston 3 slidably received by a piston rod 4 with a guide washer 5 is connected. The pump cylinder i is through an inner flange 6 in one of the Piston 3 receiving suction chamber 7 and a guide space 8 for the disc 5 divided, the space 8 forming part of the contents of the machine cylinder.
Der Kolben 3 ist mit einer eine Kammer bildenden Bohrung 9 versehen und mit dieser Bohrung auf einem Achszapfen io des Zylinderdeckels i i geführt. Die Kammer 9 ist durch einen Kanal 12 mit dem Raum 8 verbunden. Der Raum 8 ist durch Bohrungen 13 in der Zylinderwand r entlüftet, und zwischen dem Innenflansch 6 und der Führungsscheibe 5 ist eine Rückholfeder 14 untergebracht.The piston 3 is provided with a bore 9 which forms a chamber and guided with this bore on a journal io of the cylinder cover i i. The chamber 9 is connected to the space 8 by a channel 12. Room 8 is through Bores 13 in the cylinder wall r vented, and between the inner flange 6 and the guide disk 5 houses a return spring 14.
Der Achszapfen io ist mit einer abgesetzten Bohrung 15, 16 versehen, die in einen Ventilsitz 17 ausmündet. Die Bohrung 15 ist durch einen Gewindestutzen 18 des Zylinderdeckels i i an die Brennstoffzuleitung angeschlossen. In der engeren Bohrung 16 ist eine Ventilstange i9 geführt, die einen Ventilkegel 20 trägt und durch eine Feder 21 zwischen einer Schulter 22 und einer Gegenplatte 23 in der Schließlage gehalten ist. Die Zylinderkammer 7 ist durch Bohrungen 24 entlüftet.The axle journal io is provided with a stepped hole 15, 16, which opens into a valve seat 17. The bore 15 is through a threaded connector 18 of the cylinder cover i i connected to the fuel supply line. In the narrower Bore 16 is a valve rod i9 out, which carries a valve cone 20 and by a spring 21 between a shoulder 22 and a counter plate 23 in the closed position is held. The cylinder chamber 7 is vented through bores 24.
Am Übergang der abgesetzten Bohrung 15, 16 sind Radialbohrungen 25 vorgesehen, und der Achszapfen io ist unterhalb der Radialbohrungen 25 mit Mantelnuten 26 versehen oder etwas abgesetzt. Die gegenseitige Anordnung ist so getroffen, daß in der unteren Endstellung des Kolbens 3 die Radialbohrungen 25 abgeschlossen, in dessen oberer Endstellung aber freigegeben sind. Von den Mantelnuten 26 sind Kanäle 27 zu dem Kegelsitz 17 geführt.Radial bores 25 are located at the transition between the stepped bore 15, 16 provided, and the journal io is below the radial bores 25 with shell grooves 26 provided or a little removed. The mutual arrangement is such that in the lower end position of the piston 3, the radial bores 25 completed, in but whose upper end position is released. The jacket grooves 26 are channels 27 led to the conical seat 17.
Durch den Ausschieb- oder Kompressionshub des Maschinenkolbens wird der Pumpenkolben 3 in die obere Endstellung verbracht (Abb.2). Dabei gelangen Kanäle 28 der Kolbenstange ,,r mit den Radialbohrungen 25 in Deckung, so daß Brenn -stoff durch die Bohrung 15 in die Kammer 7 an gesaugt wird. Mit dem anschließenden Explosionshub des Maschinenkolbens gelangt der Pumpenkolben in die untere Endstellung (Abb. i) und drückt dabei den Brennstoff aus der Kammer 7 durch die Kanäle 26, 27 in die Kammer 9, von welcher er bei dem Kompressionshub des Maschinenkolbens und der damit verbundenen Aufwärtsbewegung des Pumpenkolbens durch die Bohrung 12 in den Raum 8 bzw. den Maschinenzylinder gespritzt wird. :fit dieser Aufwärtsbewegung des Kolbens 3 ist aber erneut Brennstoff in die Kammer 7 angesaugt «-orden. Gegebenenfalls kann in der Bohrung 12 noch ein Rückschlagv entil vorgesehen sein.Through the extension or compression stroke of the machine piston the pump piston 3 brought into the upper end position (Fig.2). Channels get there 28 of the piston rod, r with the radial bores 25, so that fuel is sucked through the bore 15 in the chamber 7 at. With the subsequent explosion stroke of the machine piston, the pump piston moves into the lower end position (Fig. i) and pushes the fuel out of the chamber 7 through the channels 26, 27 into the Chamber 9, of which he is in the compression stroke of the machine piston and the with it associated upward movement of the pump piston through the bore 12 into the space 8 or the machine cylinder is injected. : fit this upward movement of the piston 3, however, fuel is again drawn into the chamber 7. If necessary, can be provided in the bore 12 a Rückschlagv valve.
Das Beispiel soll nur den Grundgedanken der ,Erfindung erläutern und kann in konstruktiver Hinsicht weitgehend abgewandelt und den praktischen Bedürfnissen, insbesondere hinsichtlich der Regelbarkeit, angepaßt werden.The example is only intended to explain the basic idea of the invention and can be largely modified in terms of construction and the practical needs, especially with regard to controllability.
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEW575A DE818596C (en) | 1949-12-08 | 1949-12-08 | Self-loading injection pump for internal combustion engines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEW575A DE818596C (en) | 1949-12-08 | 1949-12-08 | Self-loading injection pump for internal combustion engines |
Publications (1)
Publication Number | Publication Date |
---|---|
DE818596C true DE818596C (en) | 1951-10-25 |
Family
ID=7590874
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEW575A Expired DE818596C (en) | 1949-12-08 | 1949-12-08 | Self-loading injection pump for internal combustion engines |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE818596C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1041733B (en) * | 1955-03-30 | 1958-10-23 | Odilo Schwaiger | Fuel injection device for internal combustion engines |
DE1064344B (en) * | 1956-11-14 | 1959-08-27 | Hermann Schmelzer | high pressure pump |
-
1949
- 1949-12-08 DE DEW575A patent/DE818596C/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1041733B (en) * | 1955-03-30 | 1958-10-23 | Odilo Schwaiger | Fuel injection device for internal combustion engines |
DE1064344B (en) * | 1956-11-14 | 1959-08-27 | Hermann Schmelzer | high pressure pump |
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