EP1002195A1 - Regelvorrichtung sowie verfahren zu deren herstellung - Google Patents
Regelvorrichtung sowie verfahren zu deren herstellungInfo
- Publication number
- EP1002195A1 EP1002195A1 EP98937497A EP98937497A EP1002195A1 EP 1002195 A1 EP1002195 A1 EP 1002195A1 EP 98937497 A EP98937497 A EP 98937497A EP 98937497 A EP98937497 A EP 98937497A EP 1002195 A1 EP1002195 A1 EP 1002195A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- control
- regulating sleeve
- control device
- tubular profile
- piston
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/20—Varying fuel delivery in quantity or timing
- F02M59/24—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke
- F02M59/26—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movements of pistons relative to their cylinders
- F02M59/28—Mechanisms therefor
Definitions
- the invention relates to a control device for controlling the delivery rate in a fuel injection pump, the control device having a pump cylinder, a pump piston with a longitudinal groove and control edge, a piston foot and a regulating sleeve, the piston foot being freely movable in the axial direction in the regulating sleeve.
- Such control devices are known from the prior art for controlling the delivery rate of fuel injection pumps, especially for diesel engines. They generally work according to the overflow principle with inclined edge control, which enables the flow rate to be regulated by turning the pump piston.
- the pump piston has a longitudinal groove, through which the pressure chamber above the piston is always connected to the space below an inclined edge (control edge).
- the useful stroke of the pump piston can thus be changed by rotating it. This is done using a control rod that engages the regulating sleeve via a toothed ring.
- the regulating sleeve is firmly connected to the pump piston without influencing its stroke movement.
- the control rod movement is controlled either mechanically or electronically.
- FIG. 9 An exemplary embodiment according to the prior art is shown in FIG. 9, in which the control rod 80 has a toothing which engages in the external toothing of the regulating sleeve 81.
- the regulating sleeve 81 must have an axial movement of the pump piston 82 in the pump allow cylinder 83, but can rotate it in the circumferential direction.
- a disadvantage of the known control devices is that they are expensive due to the complex manufacturing process and often tend to jam during operation or are subject to high frictional wear due to the closely fitting mating surfaces between the regulating sleeve and the piston foot.
- the object of the present invention is therefore to create a control device for controlling the delivery rate in a fuel injection pump, which allows trouble-free and low-wear function and cost-effective production. Furthermore, a method for their production is to be specified.
- the regulating sleeve has an elongated thin-walled tubular profile, preferably made of deep-drawn sheet metal, a control link plate which is connected to the tube profile and has a control link which is connected to the tube profile via the control link plate.
- control link plate is connected to the tubular profile at its end facing the pump cylinder. This can be done, for example, in such a way that the tube profile on two opposite lying circular sections protrudes through the control link plate and is supported on two further opposite circular sections on the control link plate.
- control link plate surrounds the pump cylinder in such a way that it can be rotated in the circumferential direction relative to the pump cylinder.
- the regulating sleeve is guided by the pump cylinder.
- the two sides of the control link plate, on which the tubular profile is not passed, can fit snugly against the pump cylinder.
- An advantageous embodiment of the present invention provides that line contact takes place between the piston foot and the regulating sleeve. This means that by means of a corresponding structural design of the tubular profile or the piston foot, no flat contact surfaces are formed, but only contact points running along a line. Only the piston foot is in contact with the regulating sleeve. This ensures maximum axial freedom of movement of the pump piston and at the same time creates an effective possibility of turning the same. Tilting and wear is thus counteracted.
- Another advantageous embodiment provides that preferably only point contacts are provided between the piston foot and regulating sleeve. This minimizes the friction between the piston foot and the regulating sleeve and considerably reduces friction wear. In addition, the risk of the piston foot jamming in the regulating sleeve is minimized.
- An advantageous development of the invention provides that the regulating sleeve has a tubular profile with beads parallel to the longitudinal axis. This enables simple design of the piston foot and line contact of the same with the regulating sleeve. In addition, the beads allow a relatively simple manufacture of the tubular profile and bring about an additional stiffening of the same.
- the regulating sleeve can have a smooth tubular profile. This means that the cross-shaped or cloverleaf-shaped regulating sleeve, in contrast to the corrugated tubular profile, has smooth walls and the point or line contact takes place due to the shape of the piston foot.
- the piston foot has protruding bulges at the contact points.
- the bulges resemble hemispheres attached to the piston foot.
- Such a piston foot geometry can be produced, for example, in an eroding process.
- Such a design in combination with a smooth tubular profile, achieves point contact and thus minimal wear and reliable function.
- tubular profile and the control link plate are welded together.
- welding processes with low heat distortion can be considered.
- a few welding spots are sufficient.
- Yet another embodiment of the present invention provides that the tubular profile and the control link plate are riveted together. This is particularly the case with small quantities advantageous and enables a positive connection without heat distortion.
- a last embodiment of the present invention provides that the tubular profile has a sliding coating.
- This can be, for example, a non-slip metal or plastic coating (e.g. Teflon) on the tubular profile sheet.
- the invention also provides a method for producing a regulating sleeve, which has the following steps:
- Forming processes include deep drawing, extrusion, drawing process, etc.
- the control handlebar plate is punched out of a flat metal plate and then the control handlebar plate protruding as a flag is bent open.
- the two components obtained in this way are non-positively connected, for example by welding or riveting, and thus form the regulating sleeve.
- Fig. 1 shows a section through an inventive
- Fig. 2 shows a section along the line II-II
- Fig. 1; Fig. 3 shows a section along the line III-III
- Fig. 1; Fig. 4 shows a section along the line IV-IV
- FIG. 1; FIG. 5 shows a section along the line V-V from FIG. 1; 6 shows a further embodiment in the corresponding sectional plane as FIG. 4; Fig. 7 is a partial section along the line VII-VII
- Fig. 6; 8 shows a control device according to the invention in the installed state;
- Fig. 9 shows a control device from the prior art.
- FIG. 1 shows an embodiment of the control device 1 for a fuel injection pump according to the present invention, which has a pump cylinder 2 in which a pump piston 3 with a groove and control edge (not shown) moves up and down, and one with the pump piston 3 via a piston rod 30 connected piston foot 4, which is accommodated in a regulating sleeve 5 in an axially freely movable manner and tied up in the circumferential direction.
- the regulating sleeve 5 has a tubular profile 6, in which the piston rod 30 can freely move up and down in the axial direction, and a control link plate 7, which is non-positively connected to the tubular profile 6.
- a hook-shaped control arm 8, the free end of which has a bead, is formed on the control arm plate 7.
- a control rod acts on the control link 8. Furthermore, beads 9 are shown in the tubular profile 6 of the regulating sleeve 5. Through these beads 9 will the piston foot 4 is guided in its axial longitudinal movement, as can be seen from the dashed illustration of the piston foot 4 '. The corresponding stroke movement of the pump piston 3 is brought about by an oscillating force applied to a pump tappet 10.
- the pump piston 3 moves up and down in the pump cylinder 2, whereby a corresponding amount of fuel is delivered.
- the piston foot 4, 4 'slides up and down in the regulating sleeve, a line contact taking place on the beads 9.
- the control link 8 is rotated, whereby the regulating sleeve 5 is rotated relative to the pump cylinder 2.
- the piston foot 4, 4 1 is carried along, as a result of which the pump piston 3 rotates in the pump cylinder 2, thereby changing the position of the control edge or longitudinal groove (not shown) relative to the fuel openings in the pump cylinder.
- Fig. 2 shows a section along the line II-II in Fig. 1, the pump cylinder 2, the tubular profile 6, the control arm plate 7 and the control arm 8 and the pump piston 3 are shown.
- the control arm 8 stands like a hook vertically on the control arm plate 7, which forms a tapering cantilever arm toward the control arm 8.
- the sides of the control link plate are flattened.
- the tubular profile 6 is passed through the control link plate 7.
- control link plate 7 rests on the pump cylinder 2 in such a way that it permits a rotary movement in the circumferential direction.
- the regulating sleeve 5 encompasses the pump cylinder 2 in such a way that reliable play free guidance in the circumferential direction is ensured.
- the locations at which the piston foot 4 touches the beads 9 of the tubular profile 6 can also be seen.
- the tubular profile 6 is connected to the control link plate 7 via rivets 20.
- Fig. 3 shows a section along the line III-III in Fig. 1.
- the contour of the tubular profile 6 of the regulating sleeve 5 is designed similar to a shamrock or a cross.
- the tubular profile 6 lies on its angled inner sides against the pump cylinder 2, in which the pump piston 3 oscillates up and down and is rotated in the circumferential direction depending on the position of the control arm.
- the profile sleeve 6 can be rotated in the circumferential direction around the pump cylinder 2, the piston foot 4, which is in almost line contact with the pipe profile 6 both on the beads 9 and on the angular corners 31 of the tubular profile 6, being tied in the circumferential direction, i.e. takes part in the rotary movement of the regulating sleeve.
- Fig. 4 shows a section along the line IV-IV of Fig. 1, in which the piston foot 4 is shown in the tubular profile 6 with the beads 9. Only the piston foot 4 touches the tubular profile 6 in the form of imaginary lines.
- the piston rod 30 runs up and down in the regulating sleeve 5 without play.
- the piston foot 4 has an essentially cuboid shape, the small side surfaces being curved like cylinder sections. Even in the Angular corners 31 of the tubular profile 6 are largely in line contact.
- FIG. 5 shows a section along the line V-V from FIG. 1. This shows the pump cylinder 2, the pump piston 3, the piston foot 4, the regulating sleeve 5 and the tubular profile 6 as well as the control link plate 7. It can be seen from this that the control link plate closely surrounds the pump piston 2 on two sides. Furthermore, the broken lines indicate the cloverleaf-shaped design of the tubular profile 6, which bears against the piston base 4 for guidance, the piston rod 30 running in the regulating sleeve 5 without play.
- FIG. 6 shows another embodiment of the present invention, the representation corresponding in principle to that from FIG. 4.
- the cloverleaf tubular profile 60 here has smooth walls, i.e. Walls without beads and the corresponding point contact is produced by protruding hemispherical bulges 61, 62, 63, 64, 65, 66 on the piston foot 67.
- Fig. 7 shows a section along the line VII-VII of Fig. 6.
- Fig. 8 shows the control device shown in the previous figures in the mounted state on the engine block.
- Reference number 90 denotes a first rib of the engine block and 92 denotes a second rib of the engine block.
- Reference numeral 91 defines the guide groove formed by the two ribs 90, 92.
- the regulating sleeve 5 is by the Engagement of the circular protrusion of the control link plate 7 in a cast guide groove 91 of the engine block secured against axial displacement.
- the groove 91 has enough play that the regulating sleeve can be rotated in the circumferential direction.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Reciprocating Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19734196A DE19734196A1 (de) | 1997-08-07 | 1997-08-07 | Regelvorrichtung sowie Verfahren zu deren Herstellung |
DE19734196 | 1997-08-07 | ||
PCT/EP1998/003680 WO1999007994A1 (de) | 1997-08-07 | 1998-06-18 | Regelvorrichtung sowie verfahren zu deren herstellung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1002195A1 true EP1002195A1 (de) | 2000-05-24 |
EP1002195B1 EP1002195B1 (de) | 2002-03-27 |
Family
ID=7838260
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98937497A Expired - Lifetime EP1002195B1 (de) | 1997-08-07 | 1998-06-18 | Regelvorrichtung sowie verfahren zu deren herstellung |
Country Status (5)
Country | Link |
---|---|
US (1) | US6196198B1 (de) |
EP (1) | EP1002195B1 (de) |
JP (1) | JP4057775B2 (de) |
DE (2) | DE19734196A1 (de) |
WO (1) | WO1999007994A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008050381B4 (de) * | 2008-10-02 | 2014-09-25 | Motorenfabrik Hatz Gmbh & Co Kg | Einspritzsystem für Dieselkraftstoff über ein Common Rail (CR) |
DE102008050382B4 (de) * | 2008-10-02 | 2014-07-03 | Motorenfabrik Hatz Gmbh & Co Kg | Einspritzsystem zum Betrieb kleiner Dieselmotoren |
DE102010039980A1 (de) * | 2010-08-31 | 2012-03-01 | Man Diesel & Turbo Se | Zentriervorrichtung für eine Kraftstoffeinspritzdüse |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1913520A1 (de) * | 1969-03-18 | 1970-09-24 | Bosch Gmbh Robert | Mehrzylinder-Kraffstoffeinsprifzpumpe fuer Brennkraffmaschinen |
US4430977A (en) * | 1980-02-28 | 1984-02-14 | Yanmar Diesel Engine Co., Ltd. | Fuel injection pump for internal combustion engines |
DE3105205A1 (de) * | 1981-02-13 | 1982-12-30 | Günter 8543 Hilpoltstein Elsbett | Kolbenpumpe zum foerdern von fluessigkeiten, insbesondere kraftstoff fuer hubkolben-brennkraftmaschinen |
JPS6027776A (ja) | 1983-07-26 | 1985-02-12 | Mitsubishi Heavy Ind Ltd | 燃料噴射ポンプとその製造方法 |
JPS60132064A (ja) * | 1983-12-19 | 1985-07-13 | Nippon Denso Co Ltd | 燃料噴射ポンプ |
JPS60166751A (ja) * | 1984-02-08 | 1985-08-30 | Nippon Denso Co Ltd | 内燃機関用燃料噴射装置 |
EP0181402B1 (de) * | 1984-05-08 | 1990-05-30 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Brennstoffeinspritzpumpe |
DE3428174A1 (de) * | 1984-07-31 | 1986-02-13 | Robert Bosch Gmbh, 7000 Stuttgart | Kraftstoffeinspritzpumpe fuer brennkraftmaschinen |
DE3544051A1 (de) * | 1985-12-13 | 1987-06-25 | Daimler Benz Ag | Einspritzpumpe fuer brennkraftmaschinen |
US4737086A (en) * | 1986-05-27 | 1988-04-12 | Diesel Kiki Co., Ltd. | Fuel injection pump having variable prestroke mechanism |
DE3870748D1 (de) * | 1987-07-25 | 1992-06-11 | Bosch Gmbh Robert | Kraftstoffeinspritzpumpe fuer brennkraftmaschinen. |
DE3923306A1 (de) * | 1989-07-14 | 1991-01-24 | Daimler Benz Ag | Schraegkantengesteuerte kraftstoffeinspritzpumpe fuer brennkraftmaschinen |
DE4134592C2 (de) * | 1991-10-19 | 1993-10-07 | Daimler Benz Ag | Kraftstoffeinspritzpumpe für eine Brennkraftmaschine |
-
1997
- 1997-08-07 DE DE19734196A patent/DE19734196A1/de not_active Ceased
-
1998
- 1998-06-18 DE DE59803539T patent/DE59803539D1/de not_active Expired - Fee Related
- 1998-06-18 WO PCT/EP1998/003680 patent/WO1999007994A1/de active IP Right Grant
- 1998-06-18 JP JP2000506453A patent/JP4057775B2/ja not_active Expired - Lifetime
- 1998-06-18 EP EP98937497A patent/EP1002195B1/de not_active Expired - Lifetime
-
2000
- 2000-02-04 US US09/498,113 patent/US6196198B1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO9907994A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO1999007994A1 (de) | 1999-02-18 |
JP2001523784A (ja) | 2001-11-27 |
US6196198B1 (en) | 2001-03-06 |
JP4057775B2 (ja) | 2008-03-05 |
DE59803539D1 (de) | 2002-05-02 |
EP1002195B1 (de) | 2002-03-27 |
DE19734196A1 (de) | 1999-02-11 |
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