EP0377104B1 - Method and apparatus to mount an injection pump on an internal-combustion engine - Google Patents
Method and apparatus to mount an injection pump on an internal-combustion engine Download PDFInfo
- Publication number
- EP0377104B1 EP0377104B1 EP89121363A EP89121363A EP0377104B1 EP 0377104 B1 EP0377104 B1 EP 0377104B1 EP 89121363 A EP89121363 A EP 89121363A EP 89121363 A EP89121363 A EP 89121363A EP 0377104 B1 EP0377104 B1 EP 0377104B1
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- EP
- European Patent Office
- Prior art keywords
- pump
- plug
- delivery quantity
- adjustment element
- combustion engine
- 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 - Lifetime
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 47
- 238000002347 injection Methods 0.000 title claims description 29
- 239000007924 injection Substances 0.000 title claims description 29
- 238000000034 method Methods 0.000 title claims description 22
- 238000012360 testing method Methods 0.000 claims description 32
- 239000000446 fuel Substances 0.000 claims description 10
- 238000009434 installation Methods 0.000 claims description 5
- 238000013213 extrapolation Methods 0.000 claims 2
- 238000013142 basic testing Methods 0.000 claims 1
- 230000014759 maintenance of location Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Images
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
- F02M39/00—Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements
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- 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
- F02B75/16—Engines characterised by number of cylinders, e.g. single-cylinder engines
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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
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
Definitions
- the invention is based on a fuel injection pump, in particular a single-cylinder plug-in fuel injection pump for internal combustion engines, preferably for multi-cylinder diesel internal combustion engines of the type defined in the preamble of claim 1.
- a fuel injection pump in particular a single-cylinder plug-in fuel injection pump for internal combustion engines, preferably for multi-cylinder diesel internal combustion engines of the type defined in the preamble of claim 1.
- Single-cylinder plug-in fuel injection pumps, called plug-in pumps for short are always used advantageously when the effort for an in-line or distributor injection pump is too great for internal combustion engines or when the use of short pressure lines and the better injection conditions that can be achieved with them means that the injection pumps are as close as possible to the injection nozzle of the associated engine cylinder to be mounted.
- Plug-in pumps do not have their own drive, but are driven by an internal combustion engine camshaft.
- the control of the injection quantity takes place via an internal control rod of the internal combustion engine, which is located at the level of the delivery quantity adjustment element of the plug-in pump below the associated mounting flange within the pump fitting of the internal combustion engine. That's the right thing for multi-cylinder internal combustion engines equipped with plug-in pumps
- each plug-in pump is already set at the factory to a target delivery quantity that is the same for all plug-in pumps of the same series type, and the delivery quantity adjustment element is blocked in this setting.
- the blocking of the delivery rate adjustment members is released again.
- a plug-in pump for multi-cylinder internal combustion engines which has an adjusting device for presetting the target delivery rate and fixing this setting position until it is installed in the internal combustion engine.
- the adjusting device contains an adjusting member held on the pump housing with a longitudinally continuous guide, a fixing device for fixing the adjusting member on the pump housing and a locking pin which can be inserted through the guide and into a delivery rate adjusting member.
- the locking pin is coupled to the delivery rate adjustment member for setting the desired delivery rate
- the receptacle is designed as a rotatable part in the pump housing in which the Locking pin is guided eccentrically and is locked in place on the pump housing after permanent adjustment by permanent deformation.
- the method according to the invention with the method features specified in the characterizing part of patent claim 1 has the advantage of drastically reduced manufacturing and testing costs. This cost reduction is achieved in that in the case of a fully assembled plug-in pump in which the rotational position of the pump cylinder within the pump housing is not adjusted and therefore the screwing of the pump cylinder in the pump housing does not have to be loosened by means of the pipe screw connection, because in the final hydraulic test the target injection quantity is adjusted of the delivery rate adjustment element and, in the set point found, the associated position of the delivery rate adjustment member relative to the pump housing is marked by means of a marking pen of a marking device by means of a grain impression on the delivery rate adjustment member. A locking pin of a fixing device engages in this marking and thus fixes the delivery quantity adjusting member.
- the marking of the delivery rate adjustment element takes place in a particularly efficient manner by means of the marking pen, which can also be used as a setting pin for the fixing process, which is interchangeable and reusable and which, after the insertion of the insertion pump to the internal combustion engine, with the coupling of the internal combustion engine control rod to the delivery quantity adjustment element on the insertion pump no longer has to remain on the plug-in pump.
- the upper end of the locking pin can advantageously be designed as a resilient element, as a result of which a defined holding force of the locking pin is also possible over a large length tolerance range and damage or inadvertent attachment of a further grain recess is thus avoided.
- the pin in a preferred embodiment also serves as a securing element in accordance with the characterizing features of claim 8, since it prevents the connection of the pressure line in the installed state and thus indicates that the pin must be removed before the internal combustion engine is started up.
- FIG. 1 shows a sectional view of the test base with a marking device and inserted plug-in pump
- FIG. 2 shows a top view of the pump shown in FIG. 1 and cut in a sectional plane II, in which the delivery quantity adjustment element is shown, to which the marking is attached
- 3 shows a longitudinal section through a second exemplary embodiment of the plug-in pump with a one-piece, pin having a resilient end section
- FIG. 4 shows a top view of the pump shown in FIG. 3, and in particular the design of the resilient end section of the set-up pin that applies the axially directed driving force.
- FIG. 1 shows in longitudinal section a single-cylinder plug-in fuel injection pump, hereinafter referred to as plug-in pump, which is used in a test base 10 shown in section.
- the plug-in pump has a pump housing 11, in which, with the interposition of a housing 9 of a pressure valve 12, a pump cylinder 14 is fastened in a manner known per se by means of a pipe screw connection 13.
- the pipe fitting 13 carries a connecting piece 15 with a connecting thread 16 for screwing on a pressure line leading to an injection nozzle.
- a pump piston 17 is axially driven and rotatably guided within the pump cylinder 14.
- the pump piston 17 carries on its outer surface an oblique control edge 18 which cooperates with a control bore 19 in the wall of the pump cylinder 14 to determine the delivery rate.
- the pump piston 17 is rotated by a delivery rate adjusting element 20, so that the respective stroke distance of the control edge 18 from the control bore changes.
- the delivery quantity adjusting member 20 has a regulating sleeve 21 and a link arm 22 coupled to it and a driver pin 23 projecting perpendicularly and parallel to the longitudinal axis 51 of the injection pump.
- the regulating sleeve 21 is rotationally fixed to the pump piston 17 connected, but permits its lifting movement, which is caused by a cam drive of an internal combustion engine acting on the foot of the pump piston 17 via a spring plate 24 and a return spring 25 counteracting this.
- the driving pin 23 engages in a slot-like counter-coupling part on an internal control rod of the internal combustion engine. If there are several plug-in pumps installed at a distance from one another in the housing of the internal combustion engine, the control rod of the internal combustion engine acts on all driver bolts 23 of the various plug-in pumps.
- a working space 27 of the plug-in pump delimited by the pump cylinder 14, the pump piston 17 and the pressure valve 12, is in communication with the control bore 19, in contrast to an additional bore 28 which serves only for leakage of oil, the opening of which is kept open by the pump piston 17 in the bottom dead center position shown and is sealed during pump delivery.
- the control bore 19 is connected via a suction chamber 29 to a fuel intake connection 30, which can be connected to a fuel intake line.
- the plug-in pump is fastened to the housing of the internal combustion engine by means of two screws (not shown here) which are guided through elongated holes on an integral fastening flange 31 of the pump housing 11.
- the plug-in pump Before being installed on the internal combustion engine, the plug-in pump is set on a test bench using the test base 10 to a predetermined desired delivery rate.
- the delivery quantity adjusting member 20 brought into the associated test position is marked by means of a fixing device 33, which is designed here as a marking device 40.
- the marking device 40 has a peg 32, which is guided in a longitudinal bore 36 of the pump housing 11 and is designed here as a marking pen 32 and rests on the handlebar arm 22 of the delivery quantity adjusting element 20 Is tapered at the end.
- the other end of the marking pen 32, an upper end section 41, is in frictional engagement with a dash-dotted pressure tool 40A, which conveys the required marking force and whose counter-bearing is formed by a carrier pin 23 which partially adjusts the delivery rate adjusting element 20 by means of a driver 39 and extends the marking pen 32 slidably mounted section body 38 in the test base 10.
- a dash-dotted pressure tool 40A which conveys the required marking force and whose counter-bearing is formed by a carrier pin 23 which partially adjusts the delivery rate adjusting element 20 by means of a driver 39 and extends the marking pen 32 slidably mounted section body 38 in the test base 10.
- FIG. 2 shows the delivery quantity adjusting member 20 with a laterally projecting link arm 22, which carries the driving pin 23 and on which a marking surface 52 is formed, adjacent to the fastening point of the driving pin 23.
- the marking surface 52 has a marking 37 produced by the marking pen 32, which is implemented as a depression or grain impression with a depth of preferably about 1 mm.
- FIG. 3 shows a partial longitudinal section of the injection pump with a delivery quantity adjustment element 20 which is locked by the fixing device 133.
- the fixing device 133 is the only element which has the locking pin 132 which is guided in the longitudinal bore 36 of the pump housing 11 and which has a protruding into the marking 37 and a clearance-free form-fitting tip 132a is equipped.
- the upper end portion 41 of the fixing pin 32 is, relative to the longitudinal axis 51 of the injection pump, bent and bent approximately at right angles, forms a holding part 50 and is sufficient to prevent the connection of a pressure line to the connecting piece 15, close to the connecting thread 16 of the connecting piece 15 approach.
- the connecting piece 15 has a concentric groove 42 which receives the holding part 50, into which, as shown in FIG.
- the holding part 50 which is curved in a radial plane, extends over a partial circumference, the extent of which is greater than half the circumference, by means of a partial elastic Expansion positive engages, which on the holding part 50 requires a deflection axially directed to the delivery quantity adjustment member 20 relative to the initial state, which transmits the locking force on the delivery amount adjustment member 20.
- Figure 1 shows the possibility that the setting pin 32 is also used as a marker 32.
- the pin 32 here has a flat head 44 at its upper end portion 41 in a symmetrical radial extension, the top 45 of which is slightly spherical.
- a hold-down device 46 which also prevents the connection of the pressure line, on the connection thread 16 of the connection piece 15 is screwed on and has a collar 47 which extends in radial extension beyond the lateral distance of the locking pin 32 from the longitudinal axis 51 of the injection pump and which, with its flat underside 48, transmits the axially directed fixing force to the delivery quantity adjustment member 20 to the locking pin 32 .
- the plug-in pump which is set on a test bench using a test base 10 to a predetermined desired delivery rate, is fixed in this operating position by marking the delivery rate adjustment member 20 brought into the associated test position with the aid of the marking device 40 and this marked position is held by means of the setting pin 32, which has already been used as a marking pin 32 for generating the marking 37.
- the plug-in pump is thus preset in the manufacturing plant without the high-pressure connection having to be opened via the pipe screw connection 13 and can thus be delivered to the manufacturer of the internal combustion engine, who can install the injection pump on the internal combustion engine in a manner known per se and described. Even when the plug-in pump is disassembled and reassembled on the internal combustion engine, the permanent marking 37 always ensures that the original pump basic setting can be found again.
- the set-off pin 132 shown there serves exclusively to fix the set position of the delivery quantity adjustment element 20 that corresponds to the target injection quantity.
- the marking 37 must first be made by means of the marking device 40, as shown in FIGS. 1 and 2 .
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Description
Die Erfindung geht aus von einer Kraftstoffeinspritzpumpe, insbesondere einer Einzylinder-Einsteck-Kraftstoffeinspritzpumpe für Brennkraftmaschinen, vorzugsweise für mehrzylindrige Dieselbrennkraftmaschinen der im Oberbegriff des Anspruchs 1 definierten Gattung. Einzylinder-Einsteck-Kraftstoffeinspritzpumpen, kurz Einsteckpumpen genannt, werden vorteilhaft immer dann angewandt, wenn bei Brennkraftmaschinen der Aufwand für eine Reihen- oder Verteilereinspritzpumpe zu groß ist oder wenn durch Verwendung kurzer Druckleitungen und den damit erzielbaren besseren Einspritzbedingungen die Einspritzpumpen möglichst nahe an der Einspritzdüse des zugehörigen Brennkraftmaschinenzylinders montiert werden sollen.The invention is based on a fuel injection pump, in particular a single-cylinder plug-in fuel injection pump for internal combustion engines, preferably for multi-cylinder diesel internal combustion engines of the type defined in the preamble of claim 1. Single-cylinder plug-in fuel injection pumps, called plug-in pumps for short, are always used advantageously when the effort for an in-line or distributor injection pump is too great for internal combustion engines or when the use of short pressure lines and the better injection conditions that can be achieved with them means that the injection pumps are as close as possible to the injection nozzle of the associated engine cylinder to be mounted.
Einsteckpumpen haben keinen eigenen Antrieb, sondern werden von einer brennkraftmaschineneigenen Nockenwelle angetrieben. Die Regelung der Einspritzmenge erfolgt dabei über eine brennkraftmaschineneigene Regelstange, die in Höhe des Fördermengenverstellgliedes der Einsteckpumpe unterhalb des zugehörigen Befestigungsflansches innerhalb des Pumpeneinpasses der Brennkraftmaschine liegt. Um bei mit Einsteckpumpen ausgerüsteten Mehrzylinder-Brennkraftmaschinen das recht umständliche individuelle Einstellen der angebauten Einsteckpumpen zu vermeiden und um das beliebige Austauschen von Einsteckpumpen ohne Nachjustierung zu gewährleisten, muß sichergestellt werden, daß alle an einer Brennkraftmaschine angebauten Einsteckpumpen, deren Fördermengenstellglieder über die Regelstange der Brennkraftmaschine miteinander gekoppelt und gemeinsam betätigt werden, in jeweils derselben Stellung ihrer Fördermengenverstellglieder auch dieselbe Kraftstoffeinspritzmenge fördern. Hierzu wird jede Einsteckpumpe bereits werkseitig mittels einer Prüfbank auf eine für alle Einsteckpumpen des gleichen Serientyps gleiche Sollfördermenge eingestellt und in dieser Einstellung das Fördermengenverstellglied blockiert. Nach Einbau der Einsteckpumpen in die Brennkraftmaschine und Kopplung der brennkraftmaschineneigenen Regelstange mit ihren Fördermengenverstellgliedern der Einsteckpumpen wird die Blockierung der Fördermengenverstellglieder wieder aufgehoben.Plug-in pumps do not have their own drive, but are driven by an internal combustion engine camshaft. The control of the injection quantity takes place via an internal control rod of the internal combustion engine, which is located at the level of the delivery quantity adjustment element of the plug-in pump below the associated mounting flange within the pump fitting of the internal combustion engine. That's the right thing for multi-cylinder internal combustion engines equipped with plug-in pumps To avoid cumbersome individual settings of the mounted plug-in pumps and to ensure that any plug-in pumps can be exchanged without readjustment, it must be ensured that all plug-in pumps mounted on an internal combustion engine, whose flow rate actuators are coupled to one another and actuated together via the control rod of the internal combustion engine, in the same position their delivery quantity adjustment members also promote the same fuel injection quantity. For this purpose, each plug-in pump is already set at the factory to a target delivery quantity that is the same for all plug-in pumps of the same series type, and the delivery quantity adjustment element is blocked in this setting. After installation of the plug-in pumps in the internal combustion engine and coupling of the internal control rod of the internal combustion engine with its delivery rate adjustment members of the insertion pumps, the blocking of the delivery rate adjustment members is released again.
Durch die GB-A 2 198 793 ist eine Einsteckpumpe für mehrzylindrische Brennkraftmaschinen bekannt, die zum Voreinstellen der Sollfördermenge und Fixierung dieser Einstellposition bis zu ihrem Einbau in die Brennkraftmaschine eine Justiervorrichtung aufweist. Die Justiereinrichtung enthält ein am Pumpengehäuse gehaltenes Einstellglied mit einer längsdurchgehenden Führung, eine Fixiereinrichtung zum Festlegen des Einstellgliedes am Pumpengehäuse und einen durch die Führung hindurch und in ein Fördermengenverstellglied einsteckbaren Verriegelungsstift. Entsprechend dem Einstellverfahren der eingangs genannten Art ist zur Einstellung der Sollfördermenge der Verriegelungsstift mit dem Fördermengenverstellglied gekoppelt, die Aufnahme als im Pumpengehäuse drehbares Teil ausgeführt, in dem der Verriegelungsstift exzentrisch geführt ist und das nach erfolgter Einstellung durch bleibende Verformung unlösbar am .Pumpengehäuse arretiert wird.From GB-A 2 198 793 a plug-in pump for multi-cylinder internal combustion engines is known which has an adjusting device for presetting the target delivery rate and fixing this setting position until it is installed in the internal combustion engine. The adjusting device contains an adjusting member held on the pump housing with a longitudinally continuous guide, a fixing device for fixing the adjusting member on the pump housing and a locking pin which can be inserted through the guide and into a delivery rate adjusting member. In accordance with the setting method of the type mentioned at the outset, the locking pin is coupled to the delivery rate adjustment member for setting the desired delivery rate, and the receptacle is designed as a rotatable part in the pump housing in which the Locking pin is guided eccentrically and is locked in place on the pump housing after permanent adjustment by permanent deformation.
Bei der bekannten Einsteckpumpe ist von Nachteil, daß der Aufwand für das Aufnahmeteil des Verriegelungsstiftes hoch ist und daß zur Einstellung der Kraftstoffeinspritzmenge durch entsprechende Zuordnung des Pumpenkolbens mit dem Fördermengenverstellglied zur Steuerbohrung des Pumpenzylinders es bei dem vorbekannten Verfahren notwendig ist, den Hochdruckanschluß mittels der Rohrverschraubung, die den Pumpenzylinder gegenüber dem Pumpengehäuse fixiert, zu lösen, die Drehlage des Pumpenzylinders relativ zum Pumpenkolben mittels eines exzentrischen Stellwerkzeugs bis zum Erreichen der gewünschten Fördermenge zu verändern und danach die Fixierung des Pumpenzylinders über das Wiederfestschrauben der Rohrverschraubung nochmals vorzunehmen.In the known plug-in pump, it is disadvantageous that the effort for the receiving part of the locking pin is high and that in order to adjust the fuel injection quantity by correspondingly assigning the pump piston to the delivery quantity adjusting element for the control bore of the pump cylinder, in the previously known method it is necessary to connect the high pressure by means of the pipe fitting, which fixes the pump cylinder in relation to the pump housing, loosen the rotational position of the pump cylinder relative to the pump piston by means of an eccentric adjusting tool until the desired delivery rate is reached and then fix the pump cylinder again by tightening the pipe screw connection again.
Durch die hohen Dichtigkeitsanforderungen an diese Verbindung sind die Festschraubkräfte sehr hoch, was während des Festziehens eine unerwünschte Drehlageveränderung des Pumpenzylinders begünstigt, so daß ein erneuter Justiervorgang erforderlich werden kann. Wiederholtes Öffnen und Schließen der Hochdruckverschraubung erhöht den Herstellungsaufwand für die Pumpe und ist mit dem funktionellen Nachteil der möglichen Undichtheit des Hochdruckverbandes verknüpft. Die exakte Zuordnung der Drehlage zwischen Pumpenzylinder und Fördermengenverstellglied über die Stift-Nut-Verbindung setzt voraus, daß die Passung zwischen Stift und Nut spielfrei ist, was zu einem hohen Fertigungsaufwand zwingt.Due to the high tightness requirements for this connection, the tightening forces are very high, which favors an undesired change in the rotational position of the pump cylinder during tightening, so that a new adjustment process may be necessary. Repeated opening and closing of the high pressure screw connection increases the manufacturing effort for the pump and is linked to the functional disadvantage of the possible leakage of the high pressure dressing. The exact assignment of the rotational position between the pump cylinder and the delivery rate adjustment element via the pin-groove connection presupposes that the fit between pin and groove is free of play, which forces a high manufacturing effort.
Das erfindungsgemäße Verfahren mit den im Kennzeichenteil des Patentanspruchs 1 angegebenen Verfahrensmerkmalen hat demgegenüber den Vorteil drastisch reduzierter Fertigungs- und Prüfkosten. Diese Kostenreduzierung wird dadurch erreicht, daß bei einer komplett montierten Einsteckpumpe bei der die Drehlage des Pumpenzylinders innerhalb des Pumpengehäuses nicht verstellt und deshalb auch nicht die Verschraubung des Pumpenzylinders im Pumpengehäuse mittels der Rohrverschraubung gelöst werden muß, denn in der hydraulischen Endprüfung wird die Solleinspritzmenge durch Verstellen des Fördermengenverstellglieds eingestellt und im gefundenen Einstellpunkt die zugehörige Lage des Fördermengenverstellglieds relativ zum Pumpengehäuse mittels eines Markierstifts einer Markiereinrichtung durch einen Körnereindruck am Fördermengenverstellglied bleibend markiert. In diese Markierung greift ein Absteckstift einer Fixiereinrichtung ein und fixiert damit das Fördermengenverstellglied. Damit ist es in wenig aufwendiger Weise möglich geworden, die Sollfördermenge festzuhalten, ohne daß Elemente des Hochdruckverbandes der Einsteckpumpe gelöst werden mußten. Durch dieses Verfahren wird eine pumpeninterne Fixierung verwirklicht, die ohne zusätzliche externe Maßnahmen am Pumpenprüfstand und an der Brennkraftmaschine, wie beispielsweise eine, die Drehlageneinstellung des Pumpenzylinders mittels eines Stellexzenters vornehmende Exzenterverstellung, auskommt und somit einer wirtschaftlichen Fertigung gerecht wird. Hinzu kommt, daß bei einer De- und Wiedermontage der Pumpe, beispielsweise bei einer Reparatur an der Brennkraftmaschine, die ursprüngliche Pumpengrundeinstellung auf einfache Weise exakt wiedergefunden werden kann.The method according to the invention with the method features specified in the characterizing part of patent claim 1 has the advantage of drastically reduced manufacturing and testing costs. This cost reduction is achieved in that in the case of a fully assembled plug-in pump in which the rotational position of the pump cylinder within the pump housing is not adjusted and therefore the screwing of the pump cylinder in the pump housing does not have to be loosened by means of the pipe screw connection, because in the final hydraulic test the target injection quantity is adjusted of the delivery rate adjustment element and, in the set point found, the associated position of the delivery rate adjustment member relative to the pump housing is marked by means of a marking pen of a marking device by means of a grain impression on the delivery rate adjustment member. A locking pin of a fixing device engages in this marking and thus fixes the delivery quantity adjusting member. This has made it possible in a relatively simple manner to record the desired delivery rate without having to release elements of the high-pressure unit of the plug-in pump. With this method, an internal pump fixation is realized, which without additional external measures Pump test bench and on the internal combustion engine, such as an eccentric adjustment which makes the rotational position adjustment of the pump cylinder by means of an actuating eccentric, and thus does justice to economical production. In addition, when the pump is disassembled and reassembled, for example when the internal combustion engine is being repaired, the original basic pump setting can be found exactly in a simple manner.
Durch die in den weiteren Unteransprüchen aufgeführten Merkmale sind vorteilhafte Weiterbildungen und Verbesserungen des im Hauptanspruch angegebenen Verfahrens und der zugehörigen Vorrichtung und der Einspritzpumpe möglich. So erfolgt die Markierung des Fördermengenverstellglieds auf besonders rationelle Weise mittels des Markierstifts, der auch als Absteckstift für den Fixiervorgang einsetzbar, der austauschbar und wiederverwendbar ist und der nach dem Anbau der Einsteckpumpe an die Brennkraftmaschine unter erfolgtem Ankoppeln der brennkraftmaschineneigenen Regelstange an das Fördermengenverstellglied an der Einsteckpumpe nicht mehr an der Einsteckpumpe verbleiben muß. Bei einer Einsteckpumpe mit eingesetztem Absteckstift kann in vorteilhafter Weise das obere Ende des Absteckstifts als federndes Element ausgebildet sein, wodurch eine definierte Haltekraft des Absteckstifts auch über einen großen Längentoleranzbereich möglich und eine Beschädigung oder ein versehentliches Anbringen einer weiteren Körnervertiefung damit vermieden wird. Des weiteren dient der Absteckstift in einer bevorzugten Ausgestaltung gemäß den kennzeichnenden Merkmalen des Anspruchs 8 zugleich als Sicherungselement, da er den Anschluß der Druckleitung im angebauten Zustand verhindert und so darauf hinweist, den Absteckstift vor Inbetriebnahme der Brennkraftmaschine zu entfernen.Advantageous developments and improvements of the method specified in the main claim and the associated device and the injection pump are possible due to the features listed in the further subclaims. For example, the marking of the delivery rate adjustment element takes place in a particularly efficient manner by means of the marking pen, which can also be used as a setting pin for the fixing process, which is interchangeable and reusable and which, after the insertion of the insertion pump to the internal combustion engine, with the coupling of the internal combustion engine control rod to the delivery quantity adjustment element on the insertion pump no longer has to remain on the plug-in pump. In the case of a plug-in pump with an inserted locking pin, the upper end of the locking pin can advantageously be designed as a resilient element, as a result of which a defined holding force of the locking pin is also possible over a large length tolerance range and damage or inadvertent attachment of a further grain recess is thus avoided. Furthermore, the pin in a preferred embodiment also serves as a securing element in accordance with the characterizing features of claim 8, since it prevents the connection of the pressure line in the installed state and thus indicates that the pin must be removed before the internal combustion engine is started up.
Das erfindungsgemäße Verfahren und der zugehörige Prüfuntersatz sowie die Einspritzpumpe sind anhand von in der Zeichnung dargestellten Ausführungsbeispielen in der nachfolgenden Beschreibung näher erläutert. Es zeigen: Figur 1 eine Schnittansicht des Prüfuntersatzes mit Markiervorrichtung und eingesetzter Einsteckpumpe, Figur 2 eine Draufsicht auf die in Figur 1 gezeigte und in einer Schnittebene II geschnittenen Pumpe, in der das Fördermengenverstellglied gezeigt ist, an dem die Markierung angebracht ist; Figur 3 einen Längsschnitt durch ein zweites Ausführungsbeispiel der Einsteckpumpe mit einem einstückigen, einen federnden Endabschnitt aufweisenden Absteckstift, Figur 4 eine Draufsicht der in Figur 3 gezeigten Pumpe und insbesondere die Ausbildung des die axial gerichtete Antriebskraft aufbringenden federnden Endabschnitts des Absteckstifts.The method according to the invention and the associated test base and the injection pump are shown in the drawing Embodiments explained in more detail in the following description. FIG. 1 shows a sectional view of the test base with a marking device and inserted plug-in pump; FIG. 2 shows a top view of the pump shown in FIG. 1 and cut in a sectional plane II, in which the delivery quantity adjustment element is shown, to which the marking is attached; 3 shows a longitudinal section through a second exemplary embodiment of the plug-in pump with a one-piece, pin having a resilient end section, FIG. 4 shows a top view of the pump shown in FIG. 3, and in particular the design of the resilient end section of the set-up pin that applies the axially directed driving force.
Figur 1 zeigt im Längsschnitt eine Einzylinder-Einsteck-Kraftstoffeinspritzpumpe, im folgenden kurz Einsteckpumpe genannt, die in einem im Schnitt dargestellten Prüfuntersatz 10 eingesetzt ist. Die Einsteckpumpe weist ein Pumpengehäuse 11 auf, in welchem unter Zwischenschaltung eines Gehäuses 9 eines Druckventils 12 mittels einer Rohrverschraubung 13 ein Pumpenzylinder 14 in an sich bekannter Weise befestigt ist. Die Rohrverschraubung 13 trägt einen Anschlußstutzen 15 mit Anschlußgewinde 16 zum Anschrauben einer zu einer Einspritzdüse führenden Druckleitung. Innerhalb des Pumpenzylinders 14 ist ein Pumpenkolben 17 axial angetrieben und drehbeweglich geführt. Der Pumpenkolben 17 trägt auf seiner Mantelfläche eine schräge Steuerkante 18, die zur Bestimmung der Fördermenge mit einer Steuerbohrung 19 in der Wand des Pumpenzylinders 14 zusammenwirkt. Zur Veränderung der Fördermenge wird der Pumpenkolben 17 von einem Fördermengenverstellglied 20 verdreht, so daß sich der jeweilige Hubabstand der Steuerkante 18 von der Steuerbohrung verändert. Das Fördermengenverstellglied 20 weist hierzu eine Regulierhülse 21 und einen mit dieser gekoppelten Lenkerarm 22 und einen davon senkrecht und parallel zu Längsachse 51 der Einspritzpumpe abstehenden Mitnehmerbolzen 23 auf. Die Regulierhülse 21 ist drehfest mit dem Pumpenkolben 17 verbunden, gestattet aber dessen Hubbewegung, die durch einen über einen Federteller 24 auf den Fuß des Pumpenkolbens 17 wirkenden Nockenantrieb einer Brennkraftmaschine und einer diesem entgegenwirkenden Rückstellfeder 25 hervorgerufen wird. Der Mitnehmerbolzen 23 greift bei dem hier nicht dargestellten Anbau an eine Brennkraftmaschine in ein schlitzartiges Gegenkopplungsteil an einer brennkraftmaschineneigenen Regelstange ein. Bei mehreren im Abstand voneinander im Gehäuse der Brennkraftmaschine eingebauten Einsteckpumpen greift die Regelstange der Brennkraftmaschine an allen Mitnehmerbolzen 23 der verschiedenen Einsteckpumpen an.Figure 1 shows in longitudinal section a single-cylinder plug-in fuel injection pump, hereinafter referred to as plug-in pump, which is used in a
Ein von dem Pumpenzylinder 14, dem Pumpenkolben 17 und dem Druckventil 12 begrenzter Arbeitsraum 27 der Einsteckpumpe steht, anders als eine nur der Leckölrückführung dienende zusätzliche Bohrung 28 mit der Steuerbohrung 19 in Verbindung, deren Mündung von dem Pumpenkolben 17 in der gezeigten unteren Totpunktstellung offengehalten und während der Pumpenförderung abgedichtet wird. Die Steuerbohrung 19 ist über einen Saugraum 29 mit einem Kraftstoffansaugstutzen 30 verbunden, der mit einer Kraftstoffansaugleitung verbunden werden kann. In ihrer Einbaulage wird die Einsteckpumpe am Gehäuse der Brennkraftmaschine mittels zweier hier nicht dargestellter, durch Langlöcher an einem einstückigen Befestigungsflansch 31 des Pumpengehäuses 11 hindurchgeführter Schrauben befestigt.A working space 27 of the plug-in pump, delimited by the
Vor ihrem Anbau an der Brennkraftmaschine wird die Einsteckpumpe auf einer Prüfbank unter Verwendung des Prüfuntersatzes 10 auf eine vorbestimmte Sollfördermenge eingestellt. Dabei wird das in die zugehörige Prüfstellung gebrachte Fördermengenverstellglied 20 mittels eine Fixiereinrichtung 33, die hier als Markiereinrichtung 40 ausgebildet ist, markiert. Hierzu weist die Markiereinrichtung 40 einen in einer Längsbohrung 36 des Pumpengehäuses 11 geführten Absteckstift 32 auf, der hier als Markierstift 32 ausgebildet ist und an seinem auf dem Lenkerarm 22 des Fördermengenverstellglieds 20 aufliegenden Ende kegelig zugespitzt ist. Das andere Ende des Markierstifts 32, ein oberer Endabschnitt 41, steht im Kraftschluß mit einem strichpunktiert angedeuteten, die erforderliche Markierungskraft vermittelnden Druckwerkzeug 40A, dessen Gegenlager gebildet wird von einem den Mitnehmerbolzen 23 das Fördermengenverstellglied 20 mittels eines Mitnehmers 39 teilweise unterfassenden und in Verlängerung des Markierstiftes 32 im Prüfuntersatz 10 verschiebbar gelagerten Abschnittskörper 38.Before being installed on the internal combustion engine, the plug-in pump is set on a test bench using the
Figur 2 zeigt das Fördermengenverstellglied 20 mit seitlich abstehendem Lenkerarm 22, der den Mitnehmerbolzen 23 trägt und an dem, der Befestigungsstelle des Mitnehmerbolzens 23 benachtbart, eine Markierfläche 52 ausgebildet ist. Die Markierfläche 52 weist eine durch den Markierstift 32 hergestellte Markierung 37 auf, die als Vertiefung bzw. Körnereindruck mit einer Tiefe von vorzugsweise etwa 1 mm verwirklich ist.FIG. 2 shows the delivery
Die Figur 3 stellt in einem partiellen Längsschnitt die Einspritzpumpe mit einem durch die Fixiereinrichtung 133 arretierten Fördermengenverstellglied 20 dar. Die Fixiereinrichtung 133 weist als einziges Element den in der Längsbohrung 36 des Pumpengehäuses 11 geführten Absteckstift 132 auf, der mit einer in die Markierung 37 ragenden und einen spielfreien Formschluß bildenden Spitze 132a ausgestattet ist. Der obere Endabschnitt 41 des Fixierstifts 32 ist, bezogen auf die Längsachse 51 der Einspritzpumpe, etwa rechtwinklig abgebogen und gekröpft, bildet hier ein Halteteil 50 aus und reicht dabei, den Anschluß einer Druckleitung an den Anschlußstutzen 15 verhindernd, nahe an das Anschlußgewinde 16 des Anschlußstutzens 15 heran. Der Anschlußstutzen 15 weist eine das Halteteil 50 aufnehmende konzentrisch verlaufende Hohlkehle 42 auf, in die, wie in Figur 4 gezeigt, das in einer radialen Ebene bogenförmig ausgebildete Halteteil 50 über einen Teilumfang, dessen Erstreckung größer als der halbe Umfang ist, durch eine partielle elastische Aufweitung formschlüssig einrastet, was an dem Halteteil 50 gegenüber dem Ausgangszustand eine axial zum Fördermengenverstellglied 20 gerichtete Auslenkung voraussetzt, die die Arretierkraft auf das Fördermengenverstellglied 20 vermittelt.FIG. 3 shows a partial longitudinal section of the injection pump with a delivery
Als Ausführungsvariante des Absteckstifts 32 zeigt Figur 1 die Möglichkeit auf, daß der Absteckstift 32 auch zugleich als Markierstift 32 verwendet wird. Der Absteckstift 32 weist hierbei an seinem oberen Endabschnitt 41 in symmetrisch radialer Erweiterung einen flachen Kopf 44 auf, dessen Oberseite 45 geringfügig ballig ausgeführt ist. An der Oberseite des Kopfes 44, der so nahe an das Anschlußgewinde 16 des Anschlußstutzens 15 heranragt, daß der Anschluß einer Druckleitung nicht mehr möglich ist, liegt ein Niederhalter 46 an, der, ebenfalls den Anschluß der Druckleitung verhindernd, auf dem Anschlußgewinde 16 des Anschlußstutzens 15 aufgeschraubt ist und der einen Bund 47 aufweist, der sich in radialer Erstreckung über den seitlichen Abstand des Absteckstiftes 32 von der Längsachse 51 der Einspritzpumpe hinaus erstreckt und der mit seiner planen Unterseite 48 die axial gerichtete Fixierkraft auf das Fördermengenverstellglied 20 auf den Absteckstift 32 überträgt. Nach Pumpenanbau in einem Pumpeneinpaß der Brennkraftmaschine und Ankopplung an die brennkraftmaschinenseitige Regelstange wird das festgehaltene Fördermengenverstellglied 20 durch Lösen des Absteckstiftes 32 wieder freigegeben.As a variant of the
Die zuvor anhand der Figuren 1 - 4 beschriebenen Einsteckpumpen werden mittels der auch in diesen Figuren gezeigten Vorrichtungen an die zugehörige Brennkraftmaschine unter Zugrundelegung des nachstehend aufgeführten Verfahrens angebaut.
- a) Die Einspritzpumpe wird in eine dem Pumpeneinpaß
entsprechende Aufnahmebohrung 34 desPrüfuntersatzes 10 der Prüfbank eingesetzt und dasFördermengenverstellglied 20 vomMitnehmer 39, dem Gegenkopplungsteil einer der brennkraftmaschineneigenen Regelstangeentsprechenden Verstellstange 35, imPrüfuntersatz 10 verstellbar gehalten; - b) auf der mit einer festgelegten Prüfdrehzahl angetriebenen Prüfbank wird die Fördermengen der Einspritzpumpe gemessen und die Drehlage des
Fördermengenverstellglieds 20 relativ zumPumpengehäuse 11 solange verstellt, bis die Fördermenge der Brennkraftmaschine der Sollfördermenge entspricht; - c) die eingestellte, der Sollfördermenge zugeordnete Drehlage des
Fördermengenverstellglieds 20 wird an der Einsteckpumpe festgehalten, indem amLenkerarm 22 desFördermengenverstellglieds 20 mittels der in derLängsbohrung 36 imPumpengehäuse 11geführten Markiervorrichtung 40 die Vertiefung in Form einer durch plastisches Verformenhergestellten Markierung 37 angebracht wird, wobei durch die Markierungskräfte durch einen als Teil derStellstange 35ausgebildeten Abstützkörper 38 aufgenommen werden, der zugleich einenMitnehmer 39 für die Halterung und Verstellung desFördermengenverstellglieds 20 derEinspritzpumpe 20 aufweist; - d) nach Entfernen der
Markiervorrichtung 40 aus derLängsbohrung 36 wird in dieLängsbohrung 36 desPumpengehäuses 11 derAbsteckstift 32 derart eingesetzt, daß er mit einer erforderlichen Andruckkraft in dieMarkierung 37 eingreift und dasFördermengenverstellglied 20 in seiner Prüfstellung fixiert; - e) die brennkraftmaschineneigene Regelstange wird in der der Prüfstellung des
Fördermengenverstellglieds 20 entsprechenden Prüfgrundstellung blockiert; - f) die Einstellpumpe wird mit
arretiertem Fördermengenverstellglied 20 in den Pumpeneinpaß der Brennkraftmaschine eingesetzt und dabei in eine endgültige Einbaulage gebracht, in der das festgehaltene Fördermengenverstellglied mit der gleichfalls festgehaltenen Regelstange gekoppelt ist und - g) in dieser Einbaulage die Einsteckpumpe an der Brennkraftmaschine befestigt und danach die Arretierung des
Fördermengenverstellglieds 20 und die Blockierung der Regelstange wieder gelöst wird, wobei derstabförmige Fixierstift 32 aus derLängsbohrung 36 desPumpengehäuses 11 durch axiales Herausziehen entfernt wird.
- a) The injection pump is inserted into a receiving bore 34 corresponding to the pump fitting in the
test base 10 of the test bench and the deliveryquantity adjusting member 20 from thedriver 39, the negative feedback part anadjustment rod 35 corresponding to the internal combustion engine control rod, held adjustable in thetest base 10; - b) on the test bench driven at a specified test speed, the delivery quantities of the injection pump are measured and the rotational position of the delivery
quantity adjustment member 20 is adjusted relative to thepump housing 11 until the delivery quantity of the internal combustion engine corresponds to the desired delivery quantity; - c) The set rotational position of the delivery
quantity adjusting element 20, which is assigned to the desired delivery quantity, is held on the plug-in pump by applying the depression in the form of a marking 37 produced by plastic deformation to thehandlebar arm 22 of the deliveryquantity adjusting element 20 by means of the markingdevice 40 guided in thelongitudinal bore 36 in thepump housing 11 , whereby the marking forces are absorbed by asupport body 38 which is formed as part of the adjustingrod 35 and which at the same time has adriver 39 for holding and adjusting the deliveryquantity adjusting member 20 of theinjection pump 20; - d) after removing the marking
device 40 from thelongitudinal bore 36, the lockingpin 32 is inserted into thelongitudinal bore 36 of thepump housing 11 in such a way that it engages with a required pressing force in the marking 37 and fixes the deliveryquantity adjusting member 20 in its test position; - e) the internal combustion engine control rod is blocked in the test basic position corresponding to the test position of the delivery
quantity adjusting member 20; - f) the adjusting pump is inserted with the delivery
quantity adjusting element 20 locked into the pump fitting of the internal combustion engine and thereby brought into a final installation position, in which the fixed delivery quantity adjusting member is coupled to the control rod, which is also fixed, and - g) in this installed position, the plug-in pump is attached to the internal combustion engine and then the locking of the delivery
quantity adjusting member 20 and the blocking of the control rod is released again, the rod-shapedfixing pin 32 being removed from thelongitudinal bore 36 of thepump housing 11 by axial pulling out.
Beim ersten, in den Figuren 1 und 2 dargestellten Ausführungsbeispiel wird die auf einer Prüfbank unter Verwendung eines Prüfuntersatzes 10 auf eine vorbestimmte Sollfördermenge eingestellte Einsteckpumpe in dieser Betriebsstellung fixiert, indem das dabei in die zugehörige Prüfstellung gebrachte Fördermengenverstellglied 20 mit Hilfe der Markiereinrichtung 40 markiert wird und diese markierte Stellung mittels des Absteckstiftes 32, der auch schon für das Erzeugen der Markierung 37 als Markierstift 32 verwendet wurde, festgehalten wird. Damit ist die Einsteckpumpe im Herstellwerk vor- eingestellt, ohne daß der Hochdruckanschluß über die Rohrverschraubung 13 geöffnet werden mußte und kann so an den Hersteller der Brennkraftmaschine ausgeliefert werden, der den Anbau der Einspritzpumpe an die Brennkraftmaschine in an sich bekannter und beschriebener Weise vornehmen kann. Auch bei einer De- und Wiedermontage der Einsteckpumpe an der Brennkraftmaschine ist es mit Hilfe der bleibenden Markierung 37 immer gewährleistet, die ursprüngliche Pumpengrundeinstellung wiederzufinden.In the first exemplary embodiment shown in FIGS. 1 and 2, the plug-in pump, which is set on a test bench using a
Beim zweiten Ausführungsbeispiel entsprechend den Figuren 3 und 4 dient der dort gezeigte Absteckstift 132 ausschließlich der Fixierung der eingestellten, der Solleinspritzmenge entsprechenden Lage des Fördermengenverstellglieds 20. Die Markierung 37 muß zuvor, wie in den Figuren 1 und 2 gezeigt, mittels der Markiervorrichtung 40 angebracht werden.In the second exemplary embodiment corresponding to FIGS. 3 and 4, the set-
Claims (11)
- Method for fitting a fuel injection pump, in particular a single-cylinder plug-in fuel injection pump, to an internal combustion engine, in which the injection pump controlled by an oblique edge and provided with a fastening flange on the pump housing is inserted in an acceptance hole of a test base (10) of a test bench corresponding to the pump spigot before it is fitted to the internal combustion engine and the delivery quantity adjustment element (20) is held in the test base so that it can be adjusted by a drive of a control rod (35) corresponding to the internal combustion engine's own control rods, the delivery quantity of the plug-in pump being measured by a test bench driven at a fixed test speed and the rotational position of the delivery quantity adjustment element (20) being adjusted relative to the pump housing (11) until such time as the delivery quantity of the plug-in pump corresponds to the required delivery quantity, the delivery quantity adjustment element (20) is locked in the adjusted position by means of a setting pin (32; 132) of a locking device (33; 133) inserted into a longitudinal hole (36) of the pump housing (11) and, after the pump has been fitted in a pump spigot of the internal combustion engine, being freed again by releasing the setting pin (32; 132), using the following method steps:a) the adjusted rotational position of the delivery quantity adjustment element (20) associated with the required delivery quantity is locked on the plug-in pump by applying a depression, in the form of a marking (37) produced by plastic deformation, to a part (link arm 22) of the delivery quantity adjustment element (20) by means of a marking device (40) guided in the longitudinal hole (36) in the pump housing (11) and corresponding to the locking device (33; 133);b) after at least partial removal of the marking device (40), the setting pin (32; 132) is inserted into the longitudinal hole (36) of the pump housing (11) in such a way that it engages with the necessary contact force in the marking (37) and locks the delivery quantity adjustment element (20) in its test position;c) the internal combustion engine's own control rod is locked in the basic test position corresponding to the test position of the delivery quantity adjustment element (20);d) the plug-in pump is inserted with locked delivery quantity adjustment element (20) into the pump spigot of the internal combustion engine and is brought by this means into a final installation position in which the locked delivery quantity adjustment element (20) is connected to the similarly locked control rod;e) in this installation position, the plug-in pump is fastened to the internal combustion engine and the locking of the delivery quantity adjustment element (20) and the locking of the control rod are then released again.
- Method according to Claim 1, characterised in that the setting pin (32; 132) used in method step b) is already used as the marking pin (32; 132) in method step a) and remains as setting pin (32; 132) on the plug-in pump until the fitting of the plug-in pump to the internal combustion engine has been completed, the setting pin (32; 132) then forming, together with a holding-down device (46) providing the contact force, the locking device (33; 133).
- Test base for carrying out the method of Claim 1 or 2, characterised in that the test base (10) accepts, in addition to the acceptance hole (34) for the plug-in pump and the setting rod (35) for the adjustment of the delivery quantity adjustment element (20), the marking device (40) which consists of a marking pin (32) guided in the longitudinal hole (36), of the pump housing (11), provided for the setting pin (32), of a support body (38) supported so that it can be displaced in the extrapolation of the marking pin (32) in the test base (10) and accepting the forces of the marking pin (32), and of a pressure tool (40A) axially loading the marking pin (32) (Fig. 1).
- Test base according to Claim 3, characterised in that the support body (38) is designed as part of the setting rod (35) and simultaneously has a drive (39) for the retention and adjustment of the delivery quantity adjustment element (20) of the plug-in pump (Fig. 1).
- Plug-in pump for carrying out the method of Claim 1 or 2, characterised in that the delivery quantity adjustment element (20) of the plug-in pump has a marking surface (52), which is used for accepting the marking (37) applied in method step c), in the region of its connection to the internal combustion engine's own control rod and in the extrapolation of the longitudinal hole (36) provided at a radial distance from the central longitudinal axis (51) of the plug-in pump and used for guiding the setting pin (32) (Fig. 2).
- Plug-in pump according to Claim 5 in association with the method of Claim 1 or 2, characterised in that a pipe screw connection (13) used for the connection of a pressure conduit leading to an injection nozzle is screwed into the pump housing (11), a groove (42) provided for holding the setting pin (132) being present on the connection mouthpiece (15) of the pipe screw connection (13) (Fig. 3).
- Plug-in pump according to Claim 6 with setting pin (132) used in method step d), characterised in that the setting pin (132) has a holding part (50), engaging in the groove (42) and by this means producing the contact force for the locking of the delivery quantity adjustment element (20), on its upper end section (41) remote from the delivery quantity adjustment element (20), the holding part (50) protruding approximately at right angles to the longitudinal axis (51) of the plug-in pump and surrounding in the form of a loop the groove (42) on the connection mouthpiece (15) of the plug-in pump at least over a partial periphery (Fig. 3, 4).
- Plug-in pump according to Claim 7, characterised in that the setting pin (132) is shaped, in the region of the holding part (50) engaging in the groove (42) of the connecting mouthpiece (15), in such a way that when the setting pin (132) is engaged, the pressure conduit cannot be connected and the operation of the internal combustion engine requires a disengaged setting pin (132) (Fig. 3, 4).
- Plug-in pump according to Claim 5, with setting pin (32) used in method step d), characterised in that the setting pin (32) is pressed down axially in its installation position on its upper end section (41) remote from the delivery quantity adjustment element (20) by the flange-shaped holding-down device (46), the holding-down device (46) having a collar (47) which extends out radially beyond the lateral distance of the setting pin (32) from the longitudinal axis (51) (Fig. 1).
- Plug-in pump according to Claim 9, characterised in that the setting pin (32) has a flat head (44) in symmetrical radial extension on its upper end section (41), the preferably slightly crowned top of the flat head (44) accepting the axial force of the holding-down device (46) and being in contact with a flat bottom (48) of the collar (47) of the holding-down device (46) (Fig. 1).
- Plug-in pump according to Claim 10, characterised in that the flat head (44) of the setting pin (32) extends so close to a connecting thread (16) of the connection mouthpiece (15) that it prevents the connection of the pressure conduit to the connection mouthpiece (15) (Fig. 1).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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DE3844468 | 1988-12-31 | ||
DE3844468A DE3844468A1 (en) | 1988-12-31 | 1988-12-31 | METHOD AND DEVICE FOR ATTACHING AN INJECTION PUMP TO AN INTERNAL COMBUSTION ENGINE |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0377104A1 EP0377104A1 (en) | 1990-07-11 |
EP0377104B1 true EP0377104B1 (en) | 1992-09-16 |
Family
ID=6370621
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89121363A Expired - Lifetime EP0377104B1 (en) | 1988-12-31 | 1989-11-18 | Method and apparatus to mount an injection pump on an internal-combustion engine |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0377104B1 (en) |
JP (1) | JP2880216B2 (en) |
DE (2) | DE3844468A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4207702A1 (en) * | 1992-03-11 | 1993-09-16 | Kloeckner Humboldt Deutz Ag | Method of setting fuel injection system of IC engine - involves controlling piston rotation by levers with pins attached which engage slot in control rod, equal torque is applied to each piston |
CN114263555B (en) * | 2021-09-09 | 2023-09-12 | 翟泉来 | Verification device for fuel spray nozzle of engine of miniature ship |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2069099B (en) * | 1980-02-08 | 1983-06-29 | Lucas Industries Ltd | Fuel injection pumping apparatus |
DE3602513C2 (en) * | 1985-02-02 | 1997-02-06 | Lucas Ind Plc | Liquid fuel injection pump |
IT1184982B (en) * | 1985-03-19 | 1987-10-28 | O M A P Officine Meccaniche Al | MOUNTING SYSTEM FOR IMMERSED INJECTION PUMPS ON MULTI-CYLINDER MODULAR ENGINES |
DE3622633A1 (en) * | 1985-07-20 | 1987-01-22 | Bosch Gmbh Robert | METHOD FOR ATTACHING AN INJECTION PUMP TO AN INTERNAL COMBUSTION ENGINE, AND RELATED COMBUSTION ENGINE |
DE3643961C2 (en) * | 1986-12-22 | 1994-11-03 | Bosch Gmbh Robert | Single-cylinder plug-in fuel injection pump for internal combustion engines |
-
1988
- 1988-12-31 DE DE3844468A patent/DE3844468A1/en not_active Withdrawn
-
1989
- 1989-11-18 EP EP89121363A patent/EP0377104B1/en not_active Expired - Lifetime
- 1989-11-18 DE DE8989121363T patent/DE58902297D1/en not_active Expired - Lifetime
- 1989-12-26 JP JP1335242A patent/JP2880216B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP2880216B2 (en) | 1999-04-05 |
DE58902297D1 (en) | 1992-10-22 |
JPH02221671A (en) | 1990-09-04 |
EP0377104A1 (en) | 1990-07-11 |
DE3844468A1 (en) | 1990-07-05 |
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