DE3325196A1 - FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES - Google Patents
FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINESInfo
- Publication number
- DE3325196A1 DE3325196A1 DE19833325196 DE3325196A DE3325196A1 DE 3325196 A1 DE3325196 A1 DE 3325196A1 DE 19833325196 DE19833325196 DE 19833325196 DE 3325196 A DE3325196 A DE 3325196A DE 3325196 A1 DE3325196 A1 DE 3325196A1
- Authority
- DE
- Germany
- Prior art keywords
- pump
- pump according
- pressure piece
- support surface
- internal combustion
- 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.)
- Ceased
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/04—Wound springs
- F16F1/12—Attachments or mountings
- F16F1/126—Attachments or mountings comprising an element between the end coil of the spring and the support proper, e.g. an elastomeric annulus
-
- 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
- F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
- F02M41/08—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined
- F02M41/10—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor
- F02M41/12—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor
- F02M41/121—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor with piston arranged axially to driving shaft
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Fuel-Injection Apparatus (AREA)
Description
23.6.1983 Hk/KcJune 23, 1983 Hk / Kc
ROBERT BOSCH GMBH, 7000 Stuttgart 1ROBERT BOSCH GMBH, 7000 Stuttgart 1
Kraftstoffeinspritzpumpe für Brennkraftmaschinen Stand der TechnikState of the art fuel injection pumps for internal combustion engines
Die Erfindung betrifft eine Kraftstoffeinspritzpumpe für Brennkraftmaschinen nach der Gattung des Anspruchs 1. Eine derartige Pumpe ist aus der DE-OS 29 23 ^23 bekannt, bei der das Dämpfungsglied ein doppelseitiger, von zwei Federhälften beaufschlagter Federteller ist, dessen hülsenförmiger Mittelabschnitt auf einem Stift des Gehäuses axial verschiebbar ist. Die Verschiebungen erzeugen abgestimmte Reibungskräfte, welche die erforderliche Dämpfung beider Federhälften bewirken.The invention relates to a fuel injection pump for Internal combustion engines according to the preamble of claim 1. Such a pump is known from DE-OS 29 23 ^ 23 at which the damping member is a double-sided, acted upon by two spring halves spring plate, its sleeve-shaped Middle section is axially displaceable on a pin of the housing. The shifts produce coordinated Frictional forces, which cause the necessary damping of both spring halves.
Das vorbekannte Dämpfungsglied läßt sich zwar ohne Änderung anderer Teile der Kraft stoffeinspritzpumpe in diese nachträglich einbauen, jedoch sind hierfür mehrere Einzelelemente und deren sorgfältige Abstimmung zueinander erforderlich, um die Konstanz der Reibungskräfte und mithin der Dämpfung über die gesamte Betriebszeit der Pumpe beizubehalten.The previously known attenuator can be fuel injection pump in without changing other parts of the fuel install these afterwards, but this requires several individual elements and their careful coordination with one another required to maintain the constancy of the frictional forces and therefore to maintain the damping over the entire operating time of the pump.
Vorteile der ErfindungAdvantages of the invention
Mit der Erfindung wird das im vorerwähnten Stand der Technik dargelegte Problem mit einfachen Mitteln und sicher über die gesamte Betriebszeit der Pumpe gelöst. Im Gegensatz zur vorbeschriebenen durch Reibung bewirkten Dämpfung, erfolgt erfindungsgemäß die Dämpfung durch das elastische Material des Druckstücks.With the invention, the problem presented in the aforementioned prior art with simple means and safely solved over the entire operating time of the pump. In contrast to the above-described effect caused by friction Damping, the damping takes place according to the invention by the elastic material of the pressure piece.
Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen beschrieben. Mit der Ausgestaltung der Kraftstoffeinspritzpumpe nach Anspruch 2, 3 oder k werden aus der Vielzahl angebotener Dämpfungsmaterialien drei vorgeschlagen, die eine besonders günstige Dämpfungswirkung auf die Druckfeder aufweisen. Bei der sogenannten Verteilereinspritzpumpe für Brennkraftmaschinen führt sich der Federteller des Pumpenkolbens an mindestens zwei in jeweils einem Sackloch des Gehäuses eingesteckten Stift mit Bund, den die Druckfeder zumeist'mittelbar an die Abstützfläche des Gehäuses drückt. Mit Anspruch 5 wird für eine derartige Verteilereinspritzpumpe ein technisch besonders einfacher Weg gewiesen, um die Eigenschwingungen der Druckfeder zu dämpfen. Mit Anspruch 6 und T werden Möglichkeiten für das bessere Ausweichen des bei der Dämpfung sich verschiebenden Materials der Ringscheibe aufgezeigt.Advantageous further developments of the invention are described in the subclaims. With the configuration of the fuel injection pump according to claim 2, 3 or k , three of the large number of damping materials offered are proposed which have a particularly favorable damping effect on the compression spring. In the so-called distributor injection pump for internal combustion engines, the spring plate of the pump piston is guided by at least two pegs with a collar, which are inserted into a respective blind hole in the housing and which the compression spring mostly presses directly against the support surface of the housing. Claim 5 shows a technically particularly simple way for such a distributor injection pump to dampen the natural vibrations of the compression spring. With claim 6 and T possibilities for the better evasion of the material of the annular disk that shifts during the damping are shown.
Zeichnungdrawing
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und in der folgender Figurenbeschreibung näher erläutert. Es zeigen Figur 1 abschnittsweise eine Kraftstoff-Verteilereinspritzpumpe für BrennkraftmaschinenAn embodiment of the invention is shown in the drawing and in the following description of the figures explained in more detail. FIG. 1 shows one section in sections Fuel distributor injection pump for internal combustion engines
im Diagonalschnitt und natürlicher Größe; und Figur 2 einen Ausschnitt im Bereich einer als Dämpfungsglied wirkenden Ringscheibe im Radialschnitt und vergrößerter Darstellung.in diagonal cut and natural size; and FIG. 2 shows a section in the area of an attenuator acting as an attenuator Ring disk in radial section and enlarged view.
Beschreibung des AusführungsbeispielesDescription of the embodiment
Eine Kraftstoff-Verteilereinspritzpumpe für Brennkraftmaschinen in Figur 1 hat ein Gehäuse 11 und eine darin gelagerte Antriebswelle 12, die mit einer Stirnnockenscheibe 13 gekuppelt ist, welche soviele Nocken 1k aufweist, wie die Brennkraftmaschine Zylinder hat. Die Laufbahn der Nockenscheibe 13 wirkt mit Rollen 15 zusammen, die auf ■ Bolzen 16 eines Lagerringes 17 gelagert sind. Ein Pumpenkolben 18 hat an seinem antriebsseitigen Endabschnitt einen Flansch 195 der durch einen Mitnehmer 20 mit der Stirnnockenscheibe 13 gekuppelt ist.A fuel distributor injection pump for internal combustion engines in FIG. 1 has a housing 11 and a drive shaft 12 mounted therein, which is coupled to a face cam disk 13 which has as many cams 1 k as the internal combustion engine has cylinders. The raceway of the cam disk 13 interacts with rollers 15 which are mounted on bolts 16 of a bearing ring 17. At its drive-side end section, a pump piston 18 has a flange 19 5 which is coupled to the face cam disk 13 by a driver 20.
Auf dem Flansch 19 liegt unter Zwischenlage zweier Gleitscheiben 21 ein Joch 23 des Pumpenkolbens 18 an, gegen das zwei achsparallele, diametral angeordnete Schraubendruekfedern 2^ drücken und die sich in noch zu beschreibender Weise an einer Abstützfläche 22 eines Pumpenkörpers 25 des Gehäuses 11 anlegen.A yoke 23 of the pump piston 18 rests on the flange 19 with two sliding disks 21 in between, against which two axially parallel, diametrically arranged helical compression springs 2 ^ press and which are in still to be described Manner on a support surface 22 of a pump body 25 of the housing 11.
Die Einspritzpumpe wirkt wie folgt: Bei laufender Brennkraftmaschine dreht sich die Antriebswelle 12 und damit die Stirnnoekenscheibe 13. Diese wird dabei durch die Kraft der Schraubendruckfedern 2h, die eine Rückstellkraft auf den Pumpenkolben 18 ausübt, ständig an die Rollen 15 gedruckt, so daß durch das Abrollen der locken "Ik auf den Rollen 15 eine Dreh-Hub-Bewegung des Pumpenkolbens 18 und somit die Förderung des Kraftstoffes in bekannter Weise erfolgt. Zwei Führungsstifte 27 führen sich in einem Sackloch 28 des Pumpenkörpers 25 und weisen je einen Bund 26 auf. Der eine Endabschnitt der Schrauben-The injection pump operates as follows: When the engine is running, the drive shaft 12 rotates and thus the Stirnnoekenscheibe 13. This is in this case, continuously printed by the force of the compression coil springs 2h, which exerts a restoring force on the pump piston 18 to the rollers 15, so that by the Rolling of the curls on the rollers 15 a rotary-stroke movement of the pump piston 18 and thus the delivery of the fuel takes place in a known manner. Two guide pins 27 are guided in a blind hole 28 of the pump body 25 and each have a collar 26. The an end portion of the screw
-y--y- * * ww
druckfeder 2k drückt einen Federteller 31 und eine Ausgleichsscheibe 30 an die eine Seite des Bundes 26, und der andere Endabschnitt stützt sich an dem als Federteller ausgebildeten Teil des Joches 23 ab.Compression spring 2k presses a spring plate 31 and a compensating disk 30 against one side of the collar 26, and the other end section is supported on the part of the yoke 23 which is designed as a spring plate.
Eine Ringscheibe 32 aus elastischem Material wirkt als Dämfungsglied und ist zwischen der anderen Seite des Bundes 26 und der Abstützfläche 22 des Pumpenkörpers eingefügt. Besonders brauchbar für die Ringscheibe 32 haben sich folgende elastische Materialien erwiesen: Polyamid, Silicon-Gummi und Acrylnitrit-Butadien-Kautschuk (NBR-Kautschuk). An washer 32 made of elastic material acts as a damping member and is between the other side of the Federal 26 and the support surface 22 of the pump body inserted. The following elastic materials have proven particularly useful for the annular disk 32: polyamide, Silicone rubber and acrylonitrite butadiene rubber (NBR rubber).
Figur 2 zeigt jeweils halbseitig eine erste abgewandelte Ausführungsform der Ringscheibe 32' und eine zweite Ausführungsform der Ringscheibe 32". In allen Ausführungsformen der Ringscheibe 32,32',32" hat deren Durchgangsloch 33 zum Führungsstift 27 ausreichendes Spiel. Die Ringscheibe 32' hat eine Ringnut 3^ in jeder der beiden planparallelen Anlageflächen 35, und die Ringscheibe 32" weist eine Ringnut 3k' in der Wandung des Durchgangsloches 33 auf.FIG. 2 shows a first modified embodiment of the annular disk 32 'and a second embodiment on one side of the annular disk 32 ". In all embodiments of the annular disk 32, 32 ', 32" has its through hole 33 for Guide pin 27 sufficient play. The annular disk 32 'has an annular groove 3 ^ in each of the two plane-parallel Contact surfaces 35, and the annular disk 32 ″ has an annular groove 3k ′ in the wall of the through hole 33.
Dargestellt sind die drei Ausführungsformen der Ringscheibe 32,32',32" bei nur -vorgespannter Schraubendruckfeder 2k. Wirken die Ringscheiben in vorbestimmter Weise als Dämpfungsglied, so nehmen diese die strichliert dargestellte Form ein, bei der deren elastisches Material quer zur Achse 36 des Führungsstiftes 27 ausweicht (strichliert angedeutet).The three embodiments of the washer 32, 32 ', 32 "are shown with only -pretensioned helical compression spring 2k. If the washers act in a predetermined manner as a damping member, they assume the form shown in dashed lines, in which their elastic material is transverse to the axis 36 of the guide pin 27 evades (indicated by dashed lines).
Claims (6)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19833325196 DE3325196A1 (en) | 1983-07-13 | 1983-07-13 | FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES |
GB08412293A GB2144182B (en) | 1983-07-13 | 1984-05-14 | Fuel injection pump for internal - combustion engines |
JP14252284A JPS6036769A (en) | 1983-07-13 | 1984-07-11 | Fuel jet pump for internal combustion engine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19833325196 DE3325196A1 (en) | 1983-07-13 | 1983-07-13 | FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3325196A1 true DE3325196A1 (en) | 1985-01-24 |
Family
ID=6203823
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19833325196 Ceased DE3325196A1 (en) | 1983-07-13 | 1983-07-13 | FUEL INJECTION PUMP FOR INTERNAL COMBUSTION ENGINES |
Country Status (3)
Country | Link |
---|---|
JP (1) | JPS6036769A (en) |
DE (1) | DE3325196A1 (en) |
GB (1) | GB2144182B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3439498A1 (en) * | 1984-10-27 | 1986-05-07 | Robert Bosch Gmbh, 7000 Stuttgart | Fuel injection pump for internal combustion engines |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1156606B (en) * | 1961-10-13 | 1963-10-31 | Bosch Gmbh Robert | Fuel injection pump for multi-cylinder internal combustion engines, especially for light fuel |
US3758241A (en) * | 1971-08-26 | 1973-09-11 | Bosch Gmbh Robert | Fuel injection pump for multi-cylinder internal combustion engines |
DE2923423A1 (en) * | 1979-06-09 | 1980-12-11 | Bosch Gmbh Robert | Fuel injection pump for IC engine - has two return springs in series, with spring plate between, to prevent resonant vibration of springs |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB527468A (en) * | 1939-04-13 | 1940-10-09 | Morris Motors Ltd | Improvements relating to spring mountings for motor vehicles |
CH380546A (en) * | 1960-10-26 | 1964-07-31 | Gomma Antivibranti Applic | Anti-vibration rubber washer for coil spring suspensions |
FR1391845A (en) * | 1964-01-17 | 1965-03-12 | Metallurg De Saint Urbain Atel | Advanced coil spring |
US4148469A (en) * | 1978-01-23 | 1979-04-10 | Standard Car Truck Company | Dual rate spring with elastic spring coupling |
FR2488964B1 (en) * | 1980-08-19 | 1985-10-18 | Creusot Loire | ELASTIC ELEMENT WITH SPRING HELICOIDAL |
-
1983
- 1983-07-13 DE DE19833325196 patent/DE3325196A1/en not_active Ceased
-
1984
- 1984-05-14 GB GB08412293A patent/GB2144182B/en not_active Expired
- 1984-07-11 JP JP14252284A patent/JPS6036769A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1156606B (en) * | 1961-10-13 | 1963-10-31 | Bosch Gmbh Robert | Fuel injection pump for multi-cylinder internal combustion engines, especially for light fuel |
US3758241A (en) * | 1971-08-26 | 1973-09-11 | Bosch Gmbh Robert | Fuel injection pump for multi-cylinder internal combustion engines |
DE2923423A1 (en) * | 1979-06-09 | 1980-12-11 | Bosch Gmbh Robert | Fuel injection pump for IC engine - has two return springs in series, with spring plate between, to prevent resonant vibration of springs |
Non-Patent Citations (2)
Title |
---|
Brockhaus Enzyklopädie 6. Bd., 17. Aufl. 1968 Stichwort: "Feder" * |
W.D. Berger "Die Steuerung des Gaswechsels in schnellaufenden Verbr. Mot." (Konstruktionsbücher Nr. 16) Springer Verlag 1955, S. 51-53 * |
Also Published As
Publication number | Publication date |
---|---|
JPH0380981B2 (en) | 1991-12-26 |
GB2144182B (en) | 1987-02-25 |
GB8412293D0 (en) | 1984-06-20 |
GB2144182A (en) | 1985-02-27 |
JPS6036769A (en) | 1985-02-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
8131 | Rejection |