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WO1983000724A1 - Assemblage de cames - Google Patents

Assemblage de cames Download PDF

Info

Publication number
WO1983000724A1
WO1983000724A1 PCT/US1979/000867 US7900867W WO8300724A1 WO 1983000724 A1 WO1983000724 A1 WO 1983000724A1 US 7900867 W US7900867 W US 7900867W WO 8300724 A1 WO8300724 A1 WO 8300724A1
Authority
WO
WIPO (PCT)
Prior art keywords
sleeve
holder
roller
lifter assembly
tab
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
Application number
PCT/US1979/000867
Other languages
English (en)
Inventor
Jerry A Clouse
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to PCT/US1979/000867 priority Critical patent/WO1983000724A1/fr
Anticipated expiration legal-status Critical
Publication of WO1983000724A1 publication Critical patent/WO1983000724A1/fr
Ceased legal-status Critical Current

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
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/48—Assembling; Disassembling; Replacing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L2305/00—Valve arrangements comprising rollers

Definitions

  • This invention relates to a lifter assembly for a fuel pump plunger and to a method of manufacturing the assembly and an individual part thereof.
  • lifter assemblies for fuel pumps include a support structure formed from a casting or a piece of barstock or the like by a series of machining operations.
  • a roller is included as a part of such a lifter assembly to engage an engine-driven camshaft.
  • the ends of the roller may have smaller diameters than the center portion thereof, and only the center portion serves for bearing engagement with the camshaft.
  • the reduced diameter pin ends are rotatably mounted in bores formed in the support structure.
  • the roller may be rotatably mounted on a pin having its ends fixedly mounted on the support structure.
  • the support structure must be relatively thick, and the roller or pin ends must be relatively long to bear the loads to which they are subjected.
  • the length of the bearing surface of the roller which engages the camshaft is thereby reduced by the necessity of having the roller supported by the relatively massive support structure.
  • adjacent prior art roller followers have had to be placed a sufficiently spaced distance from one another to allow mounting of the pin ends to the support structure.
  • roller follower which utilizes a cylindrical member in which a roller bearing is rotatably mounted.
  • a clip fits in opposed slots in the cylindrical member with foot portions of the clip being in position to retain the ends of the roller bearing.
  • the roller does not have a reduced diameter pin end and can extend generally the entire distance from one foot portion to the other of the clip.
  • the walls defining the slots in which the clip sits protrude significantly outwardly from the ends of the roller.
  • the slots must be machined into the cylindrical member or must otherwise be provided therein.
  • the cylindrical member is relatively heavy since it extends from the roller over the entire length of the roller follower. Thus, inertial changes are relatively great on reversal of the direction of movement of the roller follower.
  • the presentinvention is directed to overcoming one or more of the problems as set forth above.
  • a lifter assembly for a fuel pump plunger.
  • the assembly comprises a sleeve having a lateral window therethrough; a roller holder fitting within said sleeve from a first end thereof, said holder having a semi-cylindrical cavity therein orthogonal to the axis of said sleeve and opening generally at said sleeve first end; and a roller rotatingly mounted in said cavity with the ends thereof within the sleeve.
  • One embodiment of the invention relates to a method of forming a sleeve having a lateral window therethrough.
  • the method comprises forming the window through a generally rectangular metal blank having at least one pair of generally parallel edges, and curling over the piece of metal until the generally parallel edges abut to form the sleeve.
  • the above set out method provides a very Inexpensive way of forming a sleeve which can serve as the support section of a roller follower. If a roller holder is fitted within such a sleeve from a first end thereof, and the roller follower has the required cavity with the roller rotatingly mounted therein, and with the ends thereof adjacent the internal diameter of the sleeve, then the effective roller surface becomes nearly the length of the entire lifter assembly. Thisis so since there are no ends of the roller which need fit in either bearing or fixed relation in appropriate openings in the support structure, and since the sleeve is generally relatively thin. This allows such lifter assemblies to be mounted relatively close to one another, thus saving needed space in an engine. Also, since the holder generally only extends a fraction of the length of the sleeve and the sleeveis relatively thin, the overall weight of the roller follower is low compared to common prior art structures.
  • Figure 1 illustrates, in front section view, an embodiment in accordance with the present invention In its use environment
  • Figure 2 Illustrates,in enlarged exploded perspective view, an alternate embodiment in accordance with the present invention.
  • Figure 3 illustrates,in perspective, a portion of the embodiment of Figure 2, prior to carrying out of a method in accordance with an embodiment of the present invention.
  • FIG. 1 Adverting to Figure 1, thereis illustrated therein a lifter assembly 10 in accordance with the present invention for use in a fuel pump 11.
  • the lifter assembly 10 serves for motivating a fuel pump plunger 12 to move reciprocally, as a roller 14 of the assembly 10 rolls along a surface 16 of a camshaft 18.
  • a window 20 is provided through a lateral side 22 of the lifter assembly 10.
  • the window serves to admit a motivator, such as a rack 24, to engage with a collar 26 which is fastened about the plunger 12.
  • a motivator such as a rack 24
  • the collar 26, and withit the plunger 12 is caused to rotate, thereby adjusting the operation of the fuel pump 11.
  • the timing, and/or the volume of fuel delivered may be adjusted in this manner.
  • the lifter assembly 10 in accordance with the present invention, includes a sleeve 28 which serves as a support structure for the roller 14 in a manner which will shortly become apparent.
  • the window 20 in accordance with the present invention is formed through the lateral side 22 of the sleeve 28.
  • a roller holder 30 is removably fitted within the sleeve 28 from a first end 32 thereof towards a second end 34 thereof.
  • the roller holder 30 extends to adjacent the window 20 but is of a construction not to interfere with the action of the rack 24 in engaging with the collar 26, when the holder 30 is inserted in the sleeve 28.
  • the holder 30 has a semi-cylindrical cavity 36, seen in Figure 1, whichis orthogonal to a longitudinal axis 38 of the sleeve 28, and which opens generally at the first end 32 thereof.
  • roller 14 is rotatably mounted in the cavity 36 with the ends thereof, such as generally spherical ends 42 and 43 shown in Figure 2, adjacent or lightly bearing against theinner diameter of the sleeve 28.
  • ends thereof such as generally spherical ends 42 and 43 shown in Figure 2
  • nearly the entire length of the roller 14 serves for making rolling contact with the surface 16 of the camshaft 18. That is, journals for the pin ends as required by prior art constructions, are eliminated in the aforementioned structure.
  • This ailows the support structure (the sleeve 28) to be relatively thin-walled and allows adjacent lifter assemblies 10 (not shown) to be positioned significantly closer to one another than are prior art assemblies.
  • the rack 24 can fit in the window 20 and contact the collar 26 with no interference from the sleeve 28. Further, there will be no interference from the roller holder 30, which may be cut away as at cut out 44 to prevent any possible obstruction of the rack 24 and/or the collar 26. It should also be noted that assembly of the lifter assembly 10 is quite straightforward since the roller holder 30 need simply be inserted in the one end 32 of the sleeve 28.
  • the lifter assembly 10 may also include means 46 (Fig. 1) for maintaining a selective relative rotational relationship between the sleeve 28 and the holder 30. This assures that the cut out 44 is properly aligned relative to the rack 24.
  • the rotational relationship retaining means 46 includes an axially extending slot 48 in the sleeve 28 and a co-aligned axially extending slot 50 in the holder 30.
  • a pin 52 (Fig. 1) fits in both of the slots to maintain the relative rotational relationship between the sleeve 28 and the holder 30. Generally, the pin 52 would be press-fitted or otherwise suitably secured in an appropriate bore in a body 54 of the fuel pump 11.
  • the preferred sleeve 28 has means 64 (Figure 2) for maintaining holder 30 and sleeve 28 in. a selected axial relation, said means 64 being in the form of an inwardly extending ridge 66, against which the holder 30 abuts when inserted into the first end 32 thereof.
  • the assembler simply pushed the holder 30 into the first end 32 of the sleeve 28 until it abuts at ridge 66 and the roller 14, so long as slots 48 and 50 are aligned, is thereby properly positioned for contact with the surface 16 of the camshaft 18. Since holder 30 extends only up to ridge 66, the mass of the overall roller follower lifter assembly 10 is kept relatively lower than it would be if the holder 30 extended a length equal to that of the sleeve 28.
  • the sleeve 28 can be formed from a piece of tubular stock by drilling inwardly from ends 32 and 34 sufficiently to define ridge 66.
  • the window 20 and slot 48 can be formed by a simple and relatively inexpensive mandrel and die operation.
  • the second end 34 of the sleeve 28 may be counterbored as at 74 to serve for holding a retainer clip 76 ( Figure 1) against which sits a spring 78 of the fuel pump 11.
  • an alternate sleeve 128 has an axially extending cut 156 therethrough, from the first end 132 to the second end 134 thereof, formed by a pair of facing abutting edges 158 and l6 ⁇ .
  • the edges 158 andl6 ⁇ are interlocked together with one another via a lock and tab arrangement 162.
  • a relatively thin flat sleeve blank 128' which is adapted to be formed into cylindrical sleeve 128 ( Figure 3).
  • the cut 156 is preferably present in the sleeve 128 because of its preferred method of manufacture as will be described in more detail below. Further, because the blank 128' is thin, the resulting sleeve 128 is relatively thinwalled and light weight.
  • means 164 ( Figure 3) is provided in the form of at least one tab 166, and preferably a plurality of tabs 166,168,170 and 172, which extend radially inwardly from the sleeve 128 and against which the holder 130 abuts wheninserted into the first end 132 thereof.
  • the assembler need simply push the holder 130 into the first end 132 of the sleeve 128 until it abuts at the tabs 166, 168,170 and 172, and the roller 114 is properly positioned For contact with the surface 16 of the camshaft 18.
  • the roller 114 has somewhat different ends 142,143 (only 142 shown) than does the roller 14. It is noted that the tabs 170 and 172 are positioned so as to co-act with the cut out 144 so as to properly align the roller 114 relative to the slot 148, whereby the axis of the roller 114is parallel to the axis of the camshaft 18.
  • the various tabs 166,168,170 and 172 serve as means for maintaining the holder 130 in a selected axial position with respect to the sleeve 128. Since the holder 130 extends only up to the tabs 166, 168, 170 and 172, the mass of the overall roller follower lifter assembly.10is kept relatively lower than it would beif the holder 130 extended a length equal to that of the sleeve 128.
  • One or more tabs 180, 182 and 184in the blank 128' may be bent inwardly on formation of the sleeve 128 to form a support for holding the retainer clip 76.
  • a method for forming the sleeve 128.
  • the window 120 is stamped or otherwise formed through a generally rectangular piece of metal to provide the blank 128', having at least the one pair of generally parallel edges 158 and 160.
  • the blank 128' is then curled over until the generally parallel edges 158 and l6 ⁇ abut to form the sleeve 128 in the cylindrical shape shown in Figure 3.
  • the method mayinclude interlocking the edges 158 and 160 as by the tab and slot arrangement 162.
  • the sleeve 128 will generally be a part of the lifter assembly 10 for a plunger 12 of a fuel pump 11.
  • the method can further include forming at least one tab 166in the blank 128', and bending the tab 166 to assure that it will extend radially inwardly from the sleeve 128 following the aforementioned curling operation. Generally, each of the tabs 166, 168, 170 and 172 will be so bent.
  • the roller pin holder 130 is inserted in the sleeve 128 from the first end 132 thereof, with the holder 130 already having the roller 114 heldin the semi-cylindrical cavity 136 therein.
  • the ends 142 and 143 (not shown) of the roller 114 then are adjacent, and may lightly bear against, theinternal diameter of the sleeve 128, with the roller 114 being orthogonal to the sleeve 128 and generally at the first end 132 thereof.
  • the holder 130i s inserted untilit contacts the tab 166 and generally also the tabs 168,170 and 172.
  • the blank 128' in the embodiment of Figures 3 and 4, has additional tabs 180,182 and 184, which are .also bent to extend radiallyinwardly of the sleeve 128.
  • the tabs 180,182 and 184 serve as alternate means for supporting the retainer clip 76 (see Figure 1), which in the embodiment of Figures 1 and 2 is supported by the counterbore 74.
  • the blank 128' with all of the various tabs 166,168,170,172,180,182 and 184 and the window 120 therein, is formed and made in a single stamping operation. In this manner costs are minimized. Further, a relatively thin presleeve 128' can be utilized, since the spherical ends, such as the ends 142 and 143 of the roller 114, need only be held against axial movement of the roller 114 within the sleeve 128 (which is normally externally supported by a bore 86 of the fuel pump 11), as the holder 130 provides the bearing engagement therewith at the semicylindrical cavity 136.
  • the present invention provides a sleeve 28 or 128 as well as a lifter assembly 10 utilizing such a sleeve 28 or 128.
  • the sleeve 28 or 128 and the lifter assembly 10 are preferably used to motivate the plunger 12 of a fuel pump 11 of a typical engine, for example, a diesel engine. Further, such structures can be used in engine valve trains.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

Des assemblages conventionnels de cames sont relativement chers à fabriquer et s'étendent généralement d'une manière importante latéralement au-delà des extrémités de leurs surfaces de roulement. Il en résulte que les pompes de carburant utilisant de tels assemblages conventionnels doivent être espacées entre eux d'une distance relativement grande de sorte qu'une surface de roulement suffisante soit prévue pour entrer en contact avec un arbre à came. En outre, de tels assemblages sont généralement relativement lourds, ce qui a pour conséquence des changements d'inertie élevée sur leur mouvement de va-et-vient. Les extrémités (42, 43 ou 142, 143) du rouleau (14 ou 144) sont adjacentes au diamètre intérieur du manchon (28 ou 128), de sorte que le rouleau (14 ou 114) de l'assemblage à cames obtenu (10) s'étend presque sur toute sa largeur. Un support de rouleau (30 ou 130) s'adapte dans une extrémité (32 ou 132) du manchon (28 ou 128) et maintient le rouleau (14 ou 114) dans une cavité (36 ou 136).
PCT/US1979/000867 1979-10-19 1979-10-19 Assemblage de cames Ceased WO1983000724A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US1979/000867 WO1983000724A1 (fr) 1979-10-19 1979-10-19 Assemblage de cames

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1979/000867 WO1983000724A1 (fr) 1979-10-19 1979-10-19 Assemblage de cames

Publications (1)

Publication Number Publication Date
WO1983000724A1 true WO1983000724A1 (fr) 1983-03-03

Family

ID=22147745

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1979/000867 Ceased WO1983000724A1 (fr) 1979-10-19 1979-10-19 Assemblage de cames

Country Status (1)

Country Link
WO (1) WO1983000724A1 (fr)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2270728A (en) * 1992-08-22 1994-03-23 Bosch Gmbh Robert Cam drive for an internal combustion engine fuel injection pump.
US5415533A (en) * 1992-08-22 1995-05-16 Robert Bosch Gmbh Fuel injection pump for internal combustion engines
WO1999028625A1 (fr) * 1997-12-03 1999-06-10 Robert Bosch Gmbh Pompe a pistons radiaux pour alimentation en carburant sous haute pression
WO2005031151A1 (fr) * 2003-09-26 2005-04-07 Robert Bosch Gmbh Poussoir pour pompe haute pression et pompe haute pression dotee d'au moins un poussoir
WO2007039384A1 (fr) * 2005-10-01 2007-04-12 Schaeffler Kg Poussoir a galet
DE102008007026B3 (de) * 2008-01-31 2009-06-10 Continental Automotive Gmbh Verfahren zur Herstellung einer Stößelbaugruppe für eine Hochdruckpumpe
WO2010130496A1 (fr) * 2009-05-13 2010-11-18 Robert Bosch Gmbh Pompe enfichable
FR2979954A1 (fr) * 2011-09-12 2013-03-15 Peugeot Citroen Automobiles Sa Ensemble d'un moteur a combustion et d'une pompe et vehicule comprenant un tel ensemble
DE102013208125A1 (de) 2013-05-03 2014-11-06 Robert Bosch Gmbh Stößelbaugruppe, sowie Verfahren zur Herstellung einer Stößelbaugruppe
GB2533610A (en) * 2014-12-22 2016-06-29 Gm Global Tech Operations Llc Fuel unit pump and internal combustion engine comprising it
WO2022122186A3 (fr) * 2020-12-11 2022-07-21 Eaton Intelligent Power Limited Actionneur de pompe estampée et son procédé d'assemblage
US12492671B2 (en) 2020-12-11 2025-12-09 Eaton Intelligent Power Limited Stamped pump actuator and method of assembling same

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2192372A (en) * 1937-11-18 1940-03-05 Timken Roller Bearing Co Fuel injection pump
DE2303824A1 (de) * 1972-01-27 1973-08-02 Friedmann & Maier Ag Einspritzpumpe
DE2314596A1 (de) * 1972-04-05 1973-10-11 Friedmann & Maier Ag Einspritzpumpe fuer brennkraftmaschinen
US4036326A (en) * 1974-08-02 1977-07-19 Mikuni Kogyo Kabushiki Kaisha Lubricating oil pump
US4127366A (en) * 1976-03-31 1978-11-28 Nippondenso Co., Ltd. Fuel injection pump assembly for diesel engine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2192372A (en) * 1937-11-18 1940-03-05 Timken Roller Bearing Co Fuel injection pump
DE2303824A1 (de) * 1972-01-27 1973-08-02 Friedmann & Maier Ag Einspritzpumpe
DE2314596A1 (de) * 1972-04-05 1973-10-11 Friedmann & Maier Ag Einspritzpumpe fuer brennkraftmaschinen
US4036326A (en) * 1974-08-02 1977-07-19 Mikuni Kogyo Kabushiki Kaisha Lubricating oil pump
US4127366A (en) * 1976-03-31 1978-11-28 Nippondenso Co., Ltd. Fuel injection pump assembly for diesel engine

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2270728A (en) * 1992-08-22 1994-03-23 Bosch Gmbh Robert Cam drive for an internal combustion engine fuel injection pump.
GB2270728B (en) * 1992-08-22 1995-05-03 Bosch Gmbh Robert Fuel-injection pump for internal combustion engines
US5415533A (en) * 1992-08-22 1995-05-16 Robert Bosch Gmbh Fuel injection pump for internal combustion engines
DE4227854B4 (de) * 1992-08-22 2005-12-15 Robert Bosch Gmbh Kraftstoffeinspritzpumpe für Brennkraftmaschinen
WO1999028625A1 (fr) * 1997-12-03 1999-06-10 Robert Bosch Gmbh Pompe a pistons radiaux pour alimentation en carburant sous haute pression
WO2005031151A1 (fr) * 2003-09-26 2005-04-07 Robert Bosch Gmbh Poussoir pour pompe haute pression et pompe haute pression dotee d'au moins un poussoir
WO2007039384A1 (fr) * 2005-10-01 2007-04-12 Schaeffler Kg Poussoir a galet
DE102008007026B3 (de) * 2008-01-31 2009-06-10 Continental Automotive Gmbh Verfahren zur Herstellung einer Stößelbaugruppe für eine Hochdruckpumpe
WO2010130496A1 (fr) * 2009-05-13 2010-11-18 Robert Bosch Gmbh Pompe enfichable
FR2979954A1 (fr) * 2011-09-12 2013-03-15 Peugeot Citroen Automobiles Sa Ensemble d'un moteur a combustion et d'une pompe et vehicule comprenant un tel ensemble
DE102013208125A1 (de) 2013-05-03 2014-11-06 Robert Bosch Gmbh Stößelbaugruppe, sowie Verfahren zur Herstellung einer Stößelbaugruppe
GB2533610A (en) * 2014-12-22 2016-06-29 Gm Global Tech Operations Llc Fuel unit pump and internal combustion engine comprising it
WO2022122186A3 (fr) * 2020-12-11 2022-07-21 Eaton Intelligent Power Limited Actionneur de pompe estampée et son procédé d'assemblage
CN116507800A (zh) * 2020-12-11 2023-07-28 伊顿智能动力有限公司 冲压泵致动器及其组装方法
US12492671B2 (en) 2020-12-11 2025-12-09 Eaton Intelligent Power Limited Stamped pump actuator and method of assembling same

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