DE304142C - - Google Patents
Info
- Publication number
- DE304142C DE304142C DENDAT304142D DE304142DA DE304142C DE 304142 C DE304142 C DE 304142C DE NDAT304142 D DENDAT304142 D DE NDAT304142D DE 304142D A DE304142D A DE 304142DA DE 304142 C DE304142 C DE 304142C
- Authority
- DE
- Germany
- Prior art keywords
- fuel
- pumps
- pump
- switched
- suction
- 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.)
- Active
Links
- 239000000446 fuel Substances 0.000 claims description 26
- 238000002485 combustion reaction Methods 0.000 claims 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
Classifications
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
- F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
-
- 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
-
- 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
- F02M59/20—Varying fuel delivery in quantity or timing
- F02M59/36—Varying fuel delivery in quantity or timing by variably-timed valves controlling fuel passages to pumping elements or overflow passages
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
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- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
Es sind bereits Brennstoffpumpen mit mehrfach wirkenden Stufenkolben bekannt geworden. Der Brennstoff wird mittels dieser Pumpen unter entsprechend hohem Drucke allen Brennstoffeinspritzventilen gleichzeitig zugeführt. Ebenso sind einzylindrige Pumpen bekannt geworden, bei denen vor dem Druckventil oder auch hinter demselben zwecks Regelung der Fördermenge eine Uberströmleitung zum Saugraume der Pumpe angeordnet ist.Fuel pumps with multi-acting stepped pistons are already known become. By means of these pumps, the fuel is under correspondingly high pressure supplied to all fuel injectors at the same time. Single-cylinder pumps are also used become known where in front of the pressure valve or behind the same purpose Control of the delivery rate an overflow line is arranged to the suction chamber of the pump is.
Zwecks Regelung oder aus anderen Gründen ist es bei Mehrzylindermaschinen zuweilen k notwendig, die Brennstoffzuführung für einen oder mehrere Arbeitszylinder abzustellen. Dies geschieht bei bekannten Pumpen dadurch, daß von der abzuschaltenden Brennstoffpumpe das Saugventil durch geeignete Vorrichtung dauernd geöffnet bleibt, so daß die Brennstofförderung unterbrochen ist. Dieses Verfahren ist aber bei Brennstoffpumpen mit mehrfach wirkenden Tauchkolben mit Nächteilen verknüpft. Ist es z. B. notwendig, bei der mittleren Pumpe B (vgl. Zeichnung) die Brennstofförderung abzustellen, so würde während des Druckhubes der Pumpen A und C aus diesen Pumpen der Brennstoff an den undichten Führungsstellen des Tauchkolbens in den Pumpenraum B übertreten, da in dem-For the purpose of regulation or for other reasons, it is sometimes necessary in multi-cylinder machines to turn off the fuel supply for one or more working cylinders. In known pumps, this is done in that the suction valve of the fuel pump to be switched off remains permanently open by a suitable device, so that the fuel delivery is interrupted. However, this method is associated with disadvantages in fuel pumps with multiple-acting plungers. Is it z. B. necessary to turn off the fuel supply at the middle pump B (see drawing), then during the pressure stroke of pumps A and C from these pumps the fuel would pass through the leaky guide points of the plunger into the pump chamber B , since
selben bei geöffnetem Saugventile kein Überdruck herrscht.There is no overpressure when the suction valve is open.
Um diesen Nachteil zu beheben, wird gemäß der Erfindung das Saugventil der abgeschalteten Brennstoffpumpe nicht offen gehalten, sondern es wird geöffnet und geschlossen in genau derselben Art wie die Saugventile der anderen regelmäßig arbeitenden Brennstoffpumpen. Auf diese Weise wird erreicht, daß in allen Pumpenkammern die Drücke dieselben sind, so daß Brennstoff an den schwierig abzudichtenden Stellen nicht übertreten kann. Damit nun der Brennstoff, der von der abgeschalteten Pumpe gefördert wird, nicht in den abgeschalteten Zylinder übertreten kann, wird hinter den Druckventilen der einzelnen Brennstoffpumpen eine Überströmleitung angeordnet, durch welche der geförderte Brennstoff beispielsweise wieder in den Saugraum der Brennstoffpumpe zurückfließt und somit nicht in die Druckleitung zum Einspritzbrennstoff ventil des abgeschalteten Arbeitszylinders gedrückt wird. Zweckmäßig kann zugleich beim öffnen der Überströmleitung die Brennstoffleitung zum abgeschaltenen Arbeitszylinder abgeschlossen werden.In order to remedy this disadvantage, the suction valve is switched off according to the invention Fuel pump is not kept open, but it is opened and closed in exactly the same type as the suction valves on the other regular fuel pumps. In this way it is achieved that the pressures are the same in all pump chambers, so that fuel is difficult to reach cannot cross the areas to be sealed. So that the fuel that is pumped by the switched off pump, cannot pass into the deactivated cylinder, is behind the pressure valves the individual fuel pumps arranged an overflow line through which the For example, the pumped fuel flows back into the suction chamber of the fuel pump and thus not in the pressure line to the injection fuel valve of the switched off Working cylinder is pressed. It can also be useful when opening the overflow line the fuel line to the switched-off working cylinder must be closed.
Die Figur zeigt die beispielsweise Ausführung der Erfindung. 1 ist der gemeinsame Pumpenkörper, -z. B. für drei Brennstoffpumpen. 2 sind die Saugventile, 3 die Druckventile. 4 ist der mehrfach wirkende Tauchkolben. 5 sind Hebel, welche durch die Stange 6 gedreht werden, um zwecks Regelung der geförderten Brennstoffmenge die Saugventile während eines Teiles des Druckhubes geöffnet zu halten. Hinter den Druckventilen 3 sind umschaltbare Hähne 7 angebracht, von denen jeder einzelne unabhängigThe figure shows the exemplary embodiment of the invention. 1 is the common Pump body, -z. B. for three fuel pumps. 2 are the suction valves, 3 are the pressure valves. 4 is the multi-acting plunger. 5 are levers which are rotated by the rod 6 in order to regulate the amount of fuel delivered, the suction valves during part of the pressure stroke keep open. Switchable taps 7 are attached behind the pressure valves 3, each of which is independent
von den anderen eingestellt werden kann. Von den Hähnen 7 führen Leitungen 8 zu dem Saugraum. Für die Brennstoffpumpe A ist diese Überströmleitung 8 angegeben. Bei der veranschaulichten Stellung des Hahnes 7 kann bei der Pumpe A der Brennstoff nicht in die Druckleitung übertreten, sondern er fließt in den gemeinsamen Saugraum durch das Rohr 8 zurück. Für die Pumpen B und C sind die Hähne 7 so eingestellt, daß der Brennstoff in die Druckleitung zu den Brennstoffventilen an den Arbeitszylindern übertritt. Die Überströmleitungen zum gemeinsamen Saugbehälter sind dagegen bei diesen Pumpen abgeschlossen.can be set by the others. Lines 8 lead from the taps 7 to the suction chamber. This overflow line 8 is specified for the fuel pump A. In the illustrated position of the valve 7, the fuel cannot pass into the pressure line at the pump A , but it flows back into the common suction chamber through the pipe 8. For pumps B and C , the taps 7 are set so that the fuel passes into the pressure line to the fuel valves on the working cylinders. In contrast, the overflow lines to the common suction tank are closed off in these pumps.
Claims (1)
Publications (1)
Publication Number | Publication Date |
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DE304142C true DE304142C (en) |
Family
ID=557785
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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DENDAT304142D Active DE304142C (en) |
Country Status (1)
Country | Link |
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DE (1) | DE304142C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3123095A1 (en) * | 1981-06-11 | 1983-01-05 | Spica S.p.A., Livorno | "IMPROVEMENT OF INJECTION PUMPS FOR COMBUSTION ENGINES WITH MODULAR FUNCTION" |
DE3222241A1 (en) * | 1982-06-12 | 1983-12-15 | Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover | Injection engine with cylinder cut-out |
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0
- DE DENDAT304142D patent/DE304142C/de active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3123095A1 (en) * | 1981-06-11 | 1983-01-05 | Spica S.p.A., Livorno | "IMPROVEMENT OF INJECTION PUMPS FOR COMBUSTION ENGINES WITH MODULAR FUNCTION" |
DE3222241A1 (en) * | 1982-06-12 | 1983-12-15 | Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover | Injection engine with cylinder cut-out |
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