EP0307728A2 - Impact sheet for in-line injection pumps - Google Patents

Impact sheet for in-line injection pumps Download PDF

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Publication number
EP0307728A2
EP0307728A2 EP88114270A EP88114270A EP0307728A2 EP 0307728 A2 EP0307728 A2 EP 0307728A2 EP 88114270 A EP88114270 A EP 88114270A EP 88114270 A EP88114270 A EP 88114270A EP 0307728 A2 EP0307728 A2 EP 0307728A2
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EP
European Patent Office
Prior art keywords
pump
baffle plate
injection
housing
injection pump
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.)
Granted
Application number
EP88114270A
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German (de)
French (fr)
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EP0307728B1 (en
EP0307728A3 (en
Inventor
Rolf Preuss
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Kloeckner Humboldt Deutz AG
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Kloeckner Humboldt Deutz AG
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Application filed by Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Priority to AT88114270T priority Critical patent/ATE61851T1/en
Publication of EP0307728A2 publication Critical patent/EP0307728A2/en
Publication of EP0307728A3 publication Critical patent/EP0307728A3/en
Application granted granted Critical
Publication of EP0307728B1 publication Critical patent/EP0307728B1/en
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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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/001—Pumps with means for preventing erosion on fuel discharge

Definitions

  • the invention relates to an injection pump for an internal combustion engine, in particular a series injection pump according to the preamble of claim 1.
  • the invention has for its object to develop an injection pump for an internal combustion engine according to the preamble of claim 1 such that the cavitation resulting from overflow surges in the area of the overflow openings is largely avoided.
  • pinching the baffle plate between the pump cylinder and the housing is advantageous, the baffle plate being supported on the pump cylinder with its free leg ends and on the housing with its angular tip facing away from the overflow opening.
  • Such clamping ensures a sufficiently secure attachment of the baffle plate in the relief chamber and ensures problem-free removal of the baffle plate from the pump housing without special tools.
  • the baffle plate extends axially in the longitudinal direction of the relief space over a plurality of pump elements and can thus be pulled out in the longitudinal direction of the baffle plate in the longitudinal direction of the baffle plate in the event of wear and can be exchanged for new baffle plates.
  • pump cylinders 1 are inserted in series in a pressure-tight manner in accordance with the number of pump elements required and screwed to the housing 7 in a pressure-tight manner via flanges 8 arranged at their upper end.
  • the pump plunger 3 In the pump cylinder 1 shown, driven by a camshaft (not shown), the pump plunger 3 is arranged so that it can be moved up and down.
  • the pump plunger 3 delimits a pump chamber 6 in the pump cylinder 1, to which an injection line 10 connects via a generally known pressure maintenance valve 9.
  • Radial overflow openings 5 are arranged in the pump cylinder 1, preferably 2 overflow openings 5 are diametrically opposite one another, their axes 11 being perpendicular to the axis of the pump plunger 3.
  • the overflow openings 5 open into a relief chamber 12 which is designed as a bore running in the row in the pump housing 7 (FIG. 2).
  • the lateral surface of the pump cylinder 1 extends approximately to the bore axis 22, which is parallel to the longitudinal axis 23 of the in-line injection pump.
  • a bore runs as a relief space 12 on each side of a pump element in the longitudinal direction of the pump elements arranged one behind the other.
  • the relief spaces 12 (bores) are preferably closed at their front ends by screws 21 in a pressure-tight manner.
  • the two breather chambers 12 are connected to one another by transverse bores 24 arranged at the ends of the row.
  • the overflow openings 5 are assigned overflow bores arranged in the pump plunger 3, which consist of an axial bore 13 and at least one radial bore 14 crossing them.
  • the radial bore 14 is widened on the circumference of the pump plunger 3.
  • the edge of the extension 15 closest to the pump chamber 6 forms the control edge 2 of the pump plunger 3 for the overflow openings 5.
  • the pump chamber 6 is filled with fuel via suction openings - which can also be the overflow openings 5.
  • the sucked-in fuel is supplied to the injection line 10 via the pressure-maintaining valve 9 while increasing the pressure.
  • the control edge 2 passes over the overflow opening 5, as a result of which the fuel under pressure in the pump chamber 6 can flow out via the bore 13 and the bore 14.
  • This fuel jet 16 often leads to cavitation in the housing 7 of the injection pump, as a result of which metal parts can flake off, which are conveyed into the pump housing during a next suction stroke and can lead to damage in the injection system.
  • a baffle plate 4 is arranged, which essentially consists of two legs of the same length lying at an acute angle to one another.
  • This baffle plate 4 can be manufactured by angling a baffle plate.
  • the baffle plate 4, with its acute opening angle, faces the respective overflow opening 5, with its free ends 17 and 18 being supported on the pump cylinder 1, while it is supported with the angular tip 19 facing away from the overflow opening 5 on the bottom of the relief chamber 12 in the housing 7 .
  • the baffle plate 4 is clamped between the pump cylinder and the housing, thereby creating a simple, light-releasable fastening.
  • the baffle 4 is such that the common axis 11 of the mutually opposite overflow openings 5 forms the bisector of the opening angle of the baffle 4.
  • the baffle 4 is preferably symmetrical to the bisector 11; it may also be expedient to deviate in order to achieve minimal cavitation in such a way that the tip 19 lies in the upper region of the overflow opening 5. The angle is adjusted so that the cavitation has the least effect.
  • the Ent Load beam 16 essentially strikes one leg of the baffle plate 4, an acute angle being included between the relief beam 16 and the free end of the baffle plate leg pointing towards the pump cylinder 1.
  • the baffle plate preferably extends axially in the longitudinal direction of the bore forming the relief chamber 12 over the entire row of injection pump elements located one behind the other.
  • a baffle plate 4 which has been worn or destroyed by cavitation can be replaced by a new one by opening the front-side locking screws 21 of the relief spaces 12 after a certain number of operating hours.
  • the baffle plate 4 is pulled axially out of the relief space 12 and replaced by inserting a new baffle plate. Fastening of the baffle plate 4 is not necessary since it is jammed between the pump cylinder 1 and the housing 7.
  • the baffle plate is preferably made slightly larger in its height measured in the axial direction of the overflow openings 5 than the largest distance between the pump cylinder 1 and the housing 7 that can be predetermined by the design.

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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)
  • Closures For Containers (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

In fuel injection pumps the pump chamber is discharged at the end of injection by the opening of an overflow aperture. Due to these overflow impacts cavitation occurs in the housing of the injection pump which can lead to detached metal particles which in turn cause damage to the injection system. According to the invention it is proposed to arrange an acutely angled baffle plate inside the discharge chamber whose acute opening angle is turned towards the overflow aperture. The invention can be used in the case of injection pumps, in particular in-line injection pumps. <IMAGE>

Description

Die Erfindung betrifft eine Einspritzpumpe für eine Brenn­kraftmaschine, insbesondere eine Reiheneinspritzpumpe nach dem Oberbegriff des Anspruchs 1.The invention relates to an injection pump for an internal combustion engine, in particular a series injection pump according to the preamble of claim 1.

Aus der DE-OS 21 50 973 ist bekannt, zur Vermeidung von Kavitation im Gehäuse der Einspritzpumpe ein der Über­strömöffnung gegenüberliegenden Prallring anzuordnen. Die­ser Prallring ist für ein Einzelpumpenelement ausgebildet und muß bei Verschleiß durch Auseinandernehmen des ein­zelnen Pumpenelements ausgetauscht werden.From DE-OS 21 50 973 it is known to arrange a baffle ring opposite the overflow opening to avoid cavitation in the housing of the injection pump. This baffle ring is designed for a single pump element and must be replaced in the event of wear and tear by dismantling the individual pump element.

Aus der GB-PS 1 142 503 ist ein Einspritzpumpenelement be­kannt, deren im Pumpenzylinder angeordnete Überströmöff­nung eine Prallplatte zugeordnet ist, die im Pumpengehäuse eingeschraubt ist. Es hat sich gezeigt, daß eine derartige Prallplatte relativ rasch verschleißt und zu deren dann erforderlichen Auswechselung das Pumpenelement auseinan­dergenommen werden muß.From GB-PS 1 142 503 an injection pump element is known, the overflow opening of which is arranged in the pump cylinder is assigned a baffle plate which is screwed into the pump housing. It has been shown that such a baffle plate wears out relatively quickly and the pump element must be disassembled in order to replace it.

Der Erfindung liegt die Aufgabe zugrunde, eine Einspritz­pumpe für eine Brennkraftmaschine nach dem Oberbegriff des Anspruchs 1 derart weiterzubilden, daß die im Bereich der Überströmöffnungen durch Überströmstöße entstehende Kavi­tation weitgehend vermieden ist.The invention has for its object to develop an injection pump for an internal combustion engine according to the preamble of claim 1 such that the cavitation resulting from overflow surges in the area of the overflow openings is largely avoided.

Diese Aufgabe wird nach den kennzeichnenden Merkmalen des Anspruchs 1 gelöst. Es hat sich gezeigt, daß das spitz­winklig abgebogene Prallblech, dessen spitze Öffnungswin­kel der Überströmöffnung zugewandt ist, die Kavitationser­scheinungen deutlich zurück drängt, wodurch die Standzei­ten der Pumpe ohne Auftreten von Kavitationsschäden erhöht sind.This object is achieved according to the characterizing features of claim 1. It has been shown that the baffle plate bent at an acute angle, the acute opening angle of which faces the overflow opening, significantly suppresses the cavitation phenomena, as a result of which the service life of the pump is increased without the occurrence of cavitation damage.

Insbesondere hat sich gezeigt, daß ein Einklemmen des Prallbleches zwischen Pumpenzylinder und Gehäuse vorteil­haft ist, wobei sich das Prallblech mit seinen freien Schenkelenden am Pumpenzylinder und mit seiner der Über­strömöffnung abgewandten Winkelspitze am Gehäuse abstützt. Eine derartige Klemmung stellt eine ausreichend sichere Befestigung des Prallbleches im Entlastungsraum sicher und gewährleistet eine problemlose Entnahme des Prallbleches aus dem Pumpengehäuse ohne besonderes Werkzeug.In particular, it has been shown that pinching the baffle plate between the pump cylinder and the housing is advantageous, the baffle plate being supported on the pump cylinder with its free leg ends and on the housing with its angular tip facing away from the overflow opening. Such clamping ensures a sufficiently secure attachment of the baffle plate in the relief chamber and ensures problem-free removal of the baffle plate from the pump housing without special tools.

In vorteilhafter Weiterbildung der Erfindung erstreckt sich das Prallbelch axial in Längsrichtung des Ent­lastungsraums über mehrere Pumpenelemente und kann so bei Verschleiß über stirnseitig in den Entlastungsräumen vor­gesehene Öffnungen in Längsrichtung des Prallbleches herausgezogen und gegen neue Prallbleche ausgetauscht wer­den.In an advantageous further development of the invention, the baffle plate extends axially in the longitudinal direction of the relief space over a plurality of pump elements and can thus be pulled out in the longitudinal direction of the baffle plate in the longitudinal direction of the baffle plate in the event of wear and can be exchanged for new baffle plates.

Weitere Merkmale der Erfindung ergeben sich aus den weite­ren Ansprüchen, der Beschreibung und der Zeichnung, in der ein Ausführungsbeispiel der Erfindung dargestellt ist, das im folgenden näher beschrieben wird.Further features of the invention result from the further claims, the description and the drawing, in which an embodiment of the invention is shown, which is described in more detail below.

Es zeigen:

  • Fig. 1 einen Schnitt durch eine Reiheneinspritzpumpe in Höhe eines Pumpenelements,
  • Fig. 2 einen Schnitt längs der Linie II-II in Fig. 1.
Show it:
  • 1 shows a section through a series injection pump at the level of a pump element,
  • 2 shows a section along the line II-II in FIG. 1st

In ein Gehäuse 7 einer Reiheneinspritzpumpe sind entspre­chend der Anzahl der benötigten Pumpenelemente in Reihe hintereinander Pumpenzylinder 1 druckdicht eingesetzt und über an ihrem oberen Ende angeordnete Flansche 8 druck­dicht mit dem Gehäuse 7 verschraubt.In a housing 7 of an in-line injection pump, pump cylinders 1 are inserted in series in a pressure-tight manner in accordance with the number of pump elements required and screwed to the housing 7 in a pressure-tight manner via flanges 8 arranged at their upper end.

Im gezeigten Pumpenzylinder 1 ist - von einer nicht darge­stellten Nockenwelle angetrieben - im Pumpenplunger 3 auf- und abbewegbar angeordnet. Der Pumpenplunger 3 be­grenzt im Pumpenzylinder 1 einen Pumpenraum 6 an den über ein allgemein bekanntes Druckhalteventil 9 eine Einspritz­leitung 10 anschließt.In the pump cylinder 1 shown, driven by a camshaft (not shown), the pump plunger 3 is arranged so that it can be moved up and down. The pump plunger 3 delimits a pump chamber 6 in the pump cylinder 1, to which an injection line 10 connects via a generally known pressure maintenance valve 9.

Im Pumpenzylinder 1 sind radiale Überströmöffnungen 5 an­geordnet, vorzugsweise liegen 2 Überströmöffnungen 5 einander diametral gegenüber, wobei ihre Achsen 11 recht­winklig zur Achse des Pumpenplungers 3 liegen.Radial overflow openings 5 are arranged in the pump cylinder 1, preferably 2 overflow openings 5 are diametrically opposite one another, their axes 11 being perpendicular to the axis of the pump plunger 3.

Die Überströmöffnungen 5 münden in einen Entlastungsraum 12, der als längs der Reihe verlaufende Bohrung im Pumpen­gehäuse 7 ausgebildet ist (Fig. 2). Die Mantelfläche des Pumpenzylinders 1 reicht bis etwa an die Bohrungsachse 22, die parallel zur Längsachse 23 der Reiheneinspritzpumpe liegt. Bei der gezeigten Reiheneinspritzpumpe verläuft auf jeder Seite eines Pumpenelements eine Bohrung als Ent­lastungsraum 12 in Längsrichtung der hintereinander ange­ordneten Pumpenelemente. Somit münden die Überströmöff­nungen 5 der einen Seite in einen ersten Entlastungsraum 12, während die Überströmöffnungen 5 der anderen Seite in einen anderen Entlastungsraum 12 münden. Die Entlastungs­räume 12 (Bohrungen) sind vorzugsweise an ihren stirnsei­tigen Enden durch Schrauben 21 druckmitteldicht ver­schlossen. Die beiden Entlatungsräume 12 sind durch an den Enden der Reihe angeordnete Querbohrungen 24 miteinander verbunden.The overflow openings 5 open into a relief chamber 12 which is designed as a bore running in the row in the pump housing 7 (FIG. 2). The lateral surface of the pump cylinder 1 extends approximately to the bore axis 22, which is parallel to the longitudinal axis 23 of the in-line injection pump. In the series injection pump shown, a bore runs as a relief space 12 on each side of a pump element in the longitudinal direction of the pump elements arranged one behind the other. Thus, the overflow openings 5 on one side open into a first relief chamber 12, while the overflow openings 5 on the other side open into another relief chamber 12. The relief spaces 12 (bores) are preferably closed at their front ends by screws 21 in a pressure-tight manner. The two breather chambers 12 are connected to one another by transverse bores 24 arranged at the ends of the row.

Den Überströmöffnungen 5 sind im Pumpenplunger 3 angeord­nete Überströmbohrungen zugeordnet, die aus einer axialen Bohrung 13 und zumindest einer sie kreuzenden radialen Bohrung 14 besteht. Die radiale Bohrung 14 ist am Umfang des Pumpenplungers 3 erweitert. Die dem Pumpenraum 6 nächstliegende Kante der Erweiterung 15 bildet die Steuer­kante 2 des Pumpenplungers 3 für die Überströmöffnungen 5.The overflow openings 5 are assigned overflow bores arranged in the pump plunger 3, which consist of an axial bore 13 and at least one radial bore 14 crossing them. The radial bore 14 is widened on the circumference of the pump plunger 3. The edge of the extension 15 closest to the pump chamber 6 forms the control edge 2 of the pump plunger 3 for the overflow openings 5.

Ausgehend von einer unteren Stellung des Pumpenplungers 3 wird der Pumpenraum 6 über Saugöffnungen - die auch die Überströmöffnungen 5 sein können - mit Kraftstoff gefüllt. Bei in den Pumpenraum 6 eintauchenden Plunger 3 wird der angesaugte Kraftstoff unter Druckerhöhung über das Druck­halteventil 9 auf die Einspritzleitung 10 gegeben. Bei der weiteren Aufwärtsbewegung des Pumpenplungers 3 überfährt die Steuerkante 2 die Überströmöffnung 5, wodurch der un­ter Druck stehende Kraftstoff im Pumpenraum 6 über die Bohrung 13 und die Bohrung 14 abströmen kann. Dieser Kraftstoffstrahl 16 (Überstromstoß) führt im Gehäuse 7 der Einspritzpumpe oft zu Kavitation, wodurch Metallteile ab­platzen können, die bei einem nächsten Saughub in das Pum­pengehäuse gefördert werden und in der Einspritzanlage zu Schäden führen können.Starting from a lower position of the pump plunger 3, the pump chamber 6 is filled with fuel via suction openings - which can also be the overflow openings 5. When the plunger 3 plunges into the pump chamber 6, the sucked-in fuel is supplied to the injection line 10 via the pressure-maintaining valve 9 while increasing the pressure. In the further upward movement of the pump plunger 3, the control edge 2 passes over the overflow opening 5, as a result of which the fuel under pressure in the pump chamber 6 can flow out via the bore 13 and the bore 14. This fuel jet 16 (overcurrent surge) often leads to cavitation in the housing 7 of the injection pump, as a result of which metal parts can flake off, which are conveyed into the pump housing during a next suction stroke and can lead to damage in the injection system.

Nach der Erfindung ist zur Vermeidung von Kavitation im Entlastungsraum 12 ein Prallblech 4 abgeordnet, das im wesentlichen aus zwei zueinander im spitzen Winkel liegen­den Schenkeln gleicher Länge besteht. Dieses Prallblech 4 kann durch Abwinkeln einer Prallplatte gefertigt werden. Das Prallblech 4 liegt mit seinem spitzen Öffnungswinkel der jeweiligen Überströmöffnung 5 zugewandt, wobei es sich mit seinen freien Enden 17 und 18 am Pumpenzylinder 1 ab­stützt, während es mit der von der Überströmöffnung 5 ab­gewandten Winkelspitze 19 am Boden des Entlastungsraums 12 im Gehäuse 7 abgestützt ist. Das Prallblech 4 ist so zwi­schen Pumpenzylinder und Gehäuse eingeklemmt, wodurch eine einfache, licht lösbare Befestigung geschaffen ist. Das Prallblech 4 liegt so, daß die gemeinsame Achse 11 der einander gegenüberliegenden Überströmöffnungen 5 die Win­kelhalbierende des Öffnungswinkels des Prallblechs 4 bildet. Das Prallblech 4 ist zur Winkelhalbierenden 11 vorzugsweise symmetrisch ausgebildet; es kann auch zweck­mäßig sein, zu Erzielung einer minimalen Kavitation derart abzuweichen, daß die Spitze 19 im oberen Bereich der Über­strömöffnung 5 liegt. Der Winkel ist so abgestimmt, daß die Kavitation ihre geringste Auswirkung hat. Der Ent­ lastungsstrahl 16 trifft dabei im wesentlichen auf einen Schenkel des Prallblechs 4 auf, wobei zwischen dem Ent­lastungsstrahl 16 und dem auf den Pumpenzylinder 1 zeigen­den freien Ende des Prallblechschenkels ein spitzer Winkel eingeschlossen ist.According to the invention, in order to avoid cavitation in the relief space 12, a baffle plate 4 is arranged, which essentially consists of two legs of the same length lying at an acute angle to one another. This baffle plate 4 can be manufactured by angling a baffle plate. The baffle plate 4, with its acute opening angle, faces the respective overflow opening 5, with its free ends 17 and 18 being supported on the pump cylinder 1, while it is supported with the angular tip 19 facing away from the overflow opening 5 on the bottom of the relief chamber 12 in the housing 7 . The baffle plate 4 is clamped between the pump cylinder and the housing, thereby creating a simple, light-releasable fastening. The baffle 4 is such that the common axis 11 of the mutually opposite overflow openings 5 forms the bisector of the opening angle of the baffle 4. The baffle 4 is preferably symmetrical to the bisector 11; it may also be expedient to deviate in order to achieve minimal cavitation in such a way that the tip 19 lies in the upper region of the overflow opening 5. The angle is adjusted so that the cavitation has the least effect. The Ent Load beam 16 essentially strikes one leg of the baffle plate 4, an acute angle being included between the relief beam 16 and the free end of the baffle plate leg pointing towards the pump cylinder 1.

Das Prallblech erstreckt sich vorzugsweise in Längsrich­tung der den Entlastungsraum 12 bildenden Bohrung axial über die ganze Reihe der hintereinander liegenden Ein­spritzpumpenelemente. Auf diese Weise kann durch Öffnen der stirnseitigen Verschlußschrauben 21 der Entlastungs­räume 12 nach einer bestimmten Anzahl von Betriebsstunden ein durch Kavitation abgenutztes bzw. zerstörtes Prall­blech 4 durch ein neues ersetzt werden. Hierzu wird das Prallblech 4 seiner Länge nach aus dem Entlastungsraum 12 axial herausgezogen und durch Einschieben eines neuen Prallbleches ersetzt. Eine Befestigung des Prallbleches 4 ist nicht erforderlich, da sich dieses zwischen Pumpenzy­linder 1 und Gehäuse 7 einklemmt. Vorzugsweise ist hierzu das Prallblech in seiner in Achsrichtung der Überströmöff­nungen 5 gemessenen Höhe geringfügig größer ausgebildet als der konstruktiv vorgebbare größte Abstand zwischen dem Pumpenzylinder 1 und dem Gehäuse 7.The baffle plate preferably extends axially in the longitudinal direction of the bore forming the relief chamber 12 over the entire row of injection pump elements located one behind the other. In this way, a baffle plate 4 which has been worn or destroyed by cavitation can be replaced by a new one by opening the front-side locking screws 21 of the relief spaces 12 after a certain number of operating hours. For this purpose, the baffle plate 4 is pulled axially out of the relief space 12 and replaced by inserting a new baffle plate. Fastening of the baffle plate 4 is not necessary since it is jammed between the pump cylinder 1 and the housing 7. For this purpose, the baffle plate is preferably made slightly larger in its height measured in the axial direction of the overflow openings 5 than the largest distance between the pump cylinder 1 and the housing 7 that can be predetermined by the design.

Claims (7)

1. Einspritzpumpe für eine Brennkraftmaschine, insbe­sondere Reiheneinspritzpumpe, bestehend aus einem in einem Gehäuse (7) angeordneten Pumpenzylinder (1) mit einem da­rin auf- und abbewegbaren Pumpenplunger (3), der einen Pumpenraum (6) begrenzt, mit einer im Pumpenzylinder (1) vorgesehenen Überströmöffnung (5) in einen Entlastungsraum (12) des Gehäuses (7), wobei die Überströmöffnung (5) von einer Steuerkante (2) des Pumpenplungers (3) gesteuert ist und der Überströmöffnung (5) etwa gegenüberliegend ein Prallelement (4) angeordnet ist,
dadurch gekennzeichnet, daß das Prallelement ein spitz­winklig abgebogenes Prallblech (4) ist, dessen spitzer Öffnungswinkel der Überströmöffnung (5) zugewandt ist.1. Injection pump for an internal combustion engine, in particular an in-line injection pump, consisting of a pump cylinder (1) arranged in a housing (7) with a pump plunger (3) which can be moved up and down therein and which delimits a pump chamber (6), with one in the pump cylinder (1 ) provided overflow opening (5) into a relief chamber (12) of the housing (7), the overflow opening (5) being controlled by a control edge (2) of the pump plunger (3) and an impact element (4) approximately opposite the overflow opening (5) is arranged
characterized in that the baffle element is a baffle plate (4) bent at an acute angle, the acute opening angle of which faces the overflow opening (5). 2. Einspritzpumpe nach Anspruch 1,
dadurch gekennzeichnet, daß das Prallblech (4) mit seinen freien Enden (17, 18) am Pumpenzylinder (1) und mit seiner der Überströmöffnung (5) abgewandten Winkelspitze (19) am Gehäuse (7) abgestützt ist.2. Injection pump according to claim 1,
characterized in that the baffle plate (4) is supported with its free ends (17, 18) on the pump cylinder (1) and with its angular tip (19) facing away from the overflow opening (5) on the housing (7). 3. Einspritzpumpe nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß das Prallblech (4) zwischen Pumpenzylinder (1) und Gehäuse (7) eingeklemmt ist.3. Injection pump according to claim 1 or 2,
characterized in that the baffle plate (4) is clamped between the pump cylinder (1) and the housing (7). 4. Einspritzpumpe nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet, daß die Achse (11) der Überström­öffnung (5) etwa die winkelhalbierende des Öffnungswin­kel des Prallblechs (4) bildet.4. Injection pump according to one of claims 1 to 3,
characterized in that the axis (11) of the overflow opening (5) forms approximately the bisector of the opening angle of the baffle plate (4). 5. Einspritzpumpe nach Anspruch 4,
dadurch gekennzeichnet, daß das Prallblech (4) symmetrisch zur Winkelhalbierenden (11) ausgebildet ist.5. Injection pump according to claim 4,
characterized in that the baffle plate (4) is formed symmetrically to the bisector (11). 6. Einspritzpumpe nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, daß sich das Prallblech (4) in Längsrichtung des Entlastungsraum (12) axial über mehrere hintereinander angeordnete Pumpenelemente erstreckt.6. Injection pump according to one of claims 1 to 5,
characterized in that the baffle plate (4) extends axially in the longitudinal direction of the relief chamber (12) over several pump elements arranged one behind the other. 7. Einspritzpumpe nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß das Prallblech (4) in seiner Längsrichtung auswechselbar angeordnet ist.7. Injection pump according to one of claims 1 to 6,
characterized in that the baffle plate (4) is arranged to be exchangeable in its longitudinal direction.
EP88114270A 1987-09-15 1988-09-01 Impact sheet for in-line injection pumps Expired - Lifetime EP0307728B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88114270T ATE61851T1 (en) 1987-09-15 1988-09-01 DEFLECTOR FOR AN IN-LINE INJECTION PUMP.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3730912 1987-09-15
DE19873730912 DE3730912A1 (en) 1987-09-15 1987-09-15 BALL PLATE FOR A SERIES INJECTION PUMP

Publications (3)

Publication Number Publication Date
EP0307728A2 true EP0307728A2 (en) 1989-03-22
EP0307728A3 EP0307728A3 (en) 1989-11-29
EP0307728B1 EP0307728B1 (en) 1991-03-20

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ID=6336022

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88114270A Expired - Lifetime EP0307728B1 (en) 1987-09-15 1988-09-01 Impact sheet for in-line injection pumps

Country Status (3)

Country Link
EP (1) EP0307728B1 (en)
AT (1) ATE61851T1 (en)
DE (2) DE3730912A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2220212A1 (en) * 1971-05-07 1972-11-16 Friedmann & Maier AG, Hallein, Salzburg (Österreich) Injection pump
GB2042066A (en) * 1979-01-11 1980-09-17 Bosch Gmbh Robert A fuel injection pump for internal combustion engines
GB2074252A (en) * 1980-04-08 1981-10-28 Lucas Industries Ltd Fuel injection pumping apparatus
DE3136749A1 (en) * 1981-09-16 1983-03-31 Robert Bosch Gmbh, 7000 Stuttgart FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT251976B (en) * 1964-09-24 1967-01-25 Friedmann & Maier Ag Injection pump for internal combustion engines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2220212A1 (en) * 1971-05-07 1972-11-16 Friedmann & Maier AG, Hallein, Salzburg (Österreich) Injection pump
GB2042066A (en) * 1979-01-11 1980-09-17 Bosch Gmbh Robert A fuel injection pump for internal combustion engines
GB2074252A (en) * 1980-04-08 1981-10-28 Lucas Industries Ltd Fuel injection pumping apparatus
DE3136749A1 (en) * 1981-09-16 1983-03-31 Robert Bosch Gmbh, 7000 Stuttgart FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES

Also Published As

Publication number Publication date
EP0307728B1 (en) 1991-03-20
DE3862090D1 (en) 1991-04-25
EP0307728A3 (en) 1989-11-29
ATE61851T1 (en) 1991-04-15
DE3730912A1 (en) 1989-03-23

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