EP0150343A1 - Pompe d'injection de carburant pour moteurs à combustion interne - Google Patents

Pompe d'injection de carburant pour moteurs à combustion interne Download PDF

Info

Publication number
EP0150343A1
EP0150343A1 EP84114808A EP84114808A EP0150343A1 EP 0150343 A1 EP0150343 A1 EP 0150343A1 EP 84114808 A EP84114808 A EP 84114808A EP 84114808 A EP84114808 A EP 84114808A EP 0150343 A1 EP0150343 A1 EP 0150343A1
Authority
EP
European Patent Office
Prior art keywords
control rod
fuel injection
injection pump
bolt
pump according
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
EP84114808A
Other languages
German (de)
English (en)
Other versions
EP0150343B1 (fr
Inventor
Walter Ing. Häfele
Peter Dipl.-Ing. Knorreck (Fh)
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to AT84114808T priority Critical patent/ATE34017T1/de
Publication of EP0150343A1 publication Critical patent/EP0150343A1/fr
Application granted granted Critical
Publication of EP0150343B1 publication Critical patent/EP0150343B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D1/00—Controlling fuel-injection pumps, e.g. of high pressure injection type
    • F02D1/02—Controlling fuel-injection pumps, e.g. of high pressure injection type not restricted to adjustment of injection timing, e.g. varying amount of fuel delivered
    • F02D1/08—Transmission of control impulse to pump control, e.g. with power drive or power assistance
    • 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
    • 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

Definitions

  • the invention relates to a fuel injection pump for internal combustion engines of the type specified in the preamble of claim 1.
  • the bearing of the axially moving control rod with an angular profile is effected by means of two bushings held in the end faces of the pump housing with corresponding sliding guides adapted to the angular shape of the profile regulating rod, while the one arranged on the end of the profile regulating rod remote from the signal box
  • the sleeve is sealed liquid-tight with a cap screwed into the pump housing, a seal on the passage of the profile control rod by the other, interlocking - side sleeve is difficult and unreliable for a longer service life.
  • fuel leakage is particularly electromagnetic when used to prevent interlockings.
  • leaks go the implementation and SChv l er undkeit the profile associated control rod.
  • the fuel injection pump according to the invention with the characterizing features of claim 1 has the advantage of having a reliable and sufficient long-term seal.
  • the cylindrical plain bearing sleeve with the cylindrical sliding or guiding part guiding the profile control rod allows small manufacturing tolerances, which in turn guarantee good sliding ability of the guiding part in the plain bearing sleeve with low friction losses and sufficient tightness of the plain bearing.
  • the angle profile of the control rod which has proven to be advantageous can be retained unchanged. Any modifications to the control rod profile itself do not affect the tightness of the control rod outlet.
  • the elasticity of the drive plate according to claim 7 is a kind of cardanic coupling, but only for small deflections of the support pin and / or control rod, since the drive plate is compressible on one side and thus an inclination of the support pin and / or the profile control rod to a small extent allowed.
  • a control rod bearing that is reduced in diameter and thus better seals against oil spillage to the signal box results in accordance with the features of claim 16.
  • the fuel injection pump for an internal combustion engine which can only be seen in a relatively small detail in FIG. 1, is a generally known fuel injection pump, such as is used e.g. is described in DE-PS 21 49 362.
  • At least one pump cylinder is arranged in the pump housing 10, in which a pump piston provided with inclined control edges is guided, the rotation of which is carried out by a so-called delivery quantity adjusting member 11 for the purpose of changing the effective delivery stroke.
  • the delivery rate adjustment member 11 has a control rod 12 with an angular profile, which acts on the one hand on the pump piston to rotate it and on the other hand is acted upon by an interlocking 13.
  • the signal box 13 moves the control rod 12 counter to the force of a return spring 14 and thus causes the pump piston to be rotated.
  • control rod 12 is axially displaceably mounted in the pump housing 10, namely on its two end faces. At the bearing point facing the signal box 13, the control rod 12 is led out of the pump housing 10 and is acted upon at the end by an actuating plunger 15 of the signal box 13, which is electromagnetically formed here.
  • a cylindrical slide bearing sleeve 16 is fastened in the pump housing 10, here by screwing an external thread section of the slide bearing sleeve 16 in the end face of the pump housing 10.
  • a cylindrical guide ring 17 for the control rod 12 is slidably arranged with the least possible play.
  • the guide ring 17 is firmly connected to the profile control rod, encloses it in a sealing manner and thus serves as its guide part.
  • one leg 18 of the angle profile is notched at the control rod end on the interlocking side.
  • the other leg 19 is cranked.
  • an angular coupling element 20 is riveted, which carries a threaded bolt 21 which extends in the direction of the control rod displacement.
  • the actuating plunger 15 of the signal box 13 engages on the end face of the threaded bolt 21.
  • a support cap 23 for the return spring 14 is also fastened on the threaded bolt 21 by means of a nut 22.
  • the return spring 14 is supported on the one hand on the base of the support cap 23 and on the other hand on the end face of the slide bearing sleeve 16 and presses the end face of the threaded bolt 21 against the actuating plunger 15.
  • the guide ring 17 sits firmly on the notch-free leg 19 of the angle profile, tightly enclosing it. It is supported on the one hand on an end face 20a of the coupling element 20 and on the other hand on an upper and lower shoulder 24 or 25 of the notch-free leg 19 (FIG. 1).
  • a sealing washer 129 is arranged between the end faces of the threaded nut 128 and the guide ring 117.
  • the axial length of the guide ring 117 is designed so that when the control rod 12, possibly also the threaded bolt 126, is inclined, no tilting of the guide ring 117 in the slide bearing sleeve 116 can occur.
  • the slide bearing sleeve 216 is fastened by means of a cap nut-like cap 230 screwed into the pump housing 10, which has an opening 231 on the end face for a support bolt 232.
  • the support pin 232 is in turn connected via a hole-pin connection 227 to the end of the control rod 12 which, as can be seen in FIG. 5, is additionally guided in a U-shaped guide rail 233 which extends in the pump housing 10.
  • the guide ring 217 which in turn slides with little play in the slide bearing sleeve 216, surrounds the support pin 232 with a relatively large radial clearance, an elastic seal 234 being arranged between the support pin 232 and the guide ring 217.
  • Guide ring 217 and support bolt 232 are gimbal-coupled, ie control rod 12 can be inclined with respect to the axis of the support bolt 232 such that the axis of the control rod 12 can describe a cone jacket. The same naturally also applies to an inclined position of the support bolt 232 with respect to the control rod 12.
  • This cardanic coupling is realized here by a cross bore 235 and a cross pin 236 loosely lying in the cross bore 235.
  • the transverse bore 235 has a very narrow annular web 237 projecting from the bore wall, against which the transverse pin 236 rests, while it is freely movable in the radial direction in the remaining cross bore region.
  • the end sections of the transverse pin 236 protruding from the transverse bore 235 bear against a flank of an annular web 217a projecting from the inner wall of the guide ring 217 towards the supporting bolt 232.
  • the elastic seal 234 is realized by an elastic drive plate 238, which is pressed against the other flank of the ring web 217ades guide ring 217 by means of a snap ring 239 held in a groove 232a of the support bolt 232.
  • the guide ring 217 is thus connected to the support bolt 232 by means of the cross pin 236 and the drive plate 238.
  • the length of the cap 230 is dimensioned such that in the one end position of the control rod 12, the so-called stop position, the drive plate 238 seals the passage opening 231.
  • the size of the passage opening 231 is such that a support ring 240 arranged between the snap ring 239 and the drive plate 238 and seated on the circumference of the supporting bolt 232 can penetrate into the passage bore 231.
  • a simplified type of gimbal coupling between the support pin and the guide ring shows the end Example of the pump housing outlet of the profile control rod according to FIG. 6.
  • the plain bearing sleeve 316 is cap-shaped and has a central through hole 331 for a support bolt 332 connected to the control rod 12.
  • the plain bearing sleeve 316 is held in the pump housing 10 by means of clamping elements 341 which engage in a circumferential groove 316a of the plain bearing sleeve 316 and which in turn are fastened by screws 346 on the end face of the pump housing 10.
  • the coupling between the support pin 332 and the guide ring 317 which is axially displaceable in the slide bearing sleeve 316 without radial play takes place on the one hand by means of an elastic drive plate 338 and on the other hand by means of an annular projection 344 on the circumference of the support pin 332 forming, with an annular bead 342 in an annular groove 343 of the support bolt 332.
  • the annular groove 343 is delimited by an annular shoulder 345.
  • the driving plate 338 bears against the end face of the guide ring 317, while the ring projection 344 bears against the bottom 317a of the cup-shaped guide ring 317.
  • the elasticity of the drive plate 338 allows the limited inclination of the control rod axis with respect to the axis of the support bolt 332 in any direction in the manner of a cardan coupling.
  • the length of the plain bearing sleeve 316 is in turn dimensioned here in such a way that in one end position of the control rod 12 the elastic drive plate 338 covers the passage opening 331, the annular bead 342 entering the passage opening 331.
  • the control rod guide part consists of a bolt-like cylindrical guide section 450 of a support bolt 432 fastened to an interlocking end 12a of the profile control rod 12
  • the end cap screwed into the pump housing 10 bears at its end facing the positioner 13 indicated by dash-dotted lines as a bottom part projecting inwardly toward the guide section 450 of the supporting bolt 432, a slide bearing sleeve 416 which, like the guide rings of the previous examples to be considered as equivalent, has a relatively short, tilt-proof axial minimum length.
  • the slide bearing sleeve 416 is provided with a central passage opening 431 which, due to an inner slide bearing fit, seals an interior 10a of the pump housing 10, which at least accommodates the control rod 12, towards the signal box 13 and the control rod 12 by means of the guide section 450 guided in this passage opening 431 during the actuating movements of the control rod 12 leads.
  • the profile control rod 12, which is designed here as an angle control rod, as in the previous examples, receives at its end 12a on the interlocking side one of the two legs 18 and 19 of the control rod 12, which comprises fastening pins 454 of the support bolt 432.
  • the fastening pin 454 is riveted to the interlocking-side end 12a of the control rod 12 and, if necessary, additionally welded to it for safety reasons, an annular collar 452 located between the fastening pin 454 and the guide section 450 of the support bolt 432 with its one shoulder 452a on the end face of the control rod end 12a is present.
  • the plain bearing sleeve 416 designed as the bottom part of the closure cap 451 is manufactured as a separate part and connected to the latter by a flanged connection.
  • the slide bearing sleeve 416 accommodates in a ring groove 455 a bead-shaped fastening ring of a ring seal 453 designed as a lip seal.
  • the relatively small guide diameter in the passage opening 431 in this embodiment variant ensures a good seal against oil spillage even during operation.
  • axially displaceable guide part 17, 117, 217, 317, 450 be as small as possible, but ensure a perfect sliding displacement of the guide part 17-317,450 in the slide bearing sleeve 16 - 416. While the radial play in the exemplary embodiments according to FIGS. 4-6 should not exceed a few hundredths of a millimeter, it can be up to 0.1 mm in the exemplary embodiments according to FIGS. 1-3 and 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP84114808A 1983-12-12 1984-12-05 Pompe d'injection de carburant pour moteurs à combustion interne Expired EP0150343B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84114808T ATE34017T1 (de) 1983-12-12 1984-12-05 Kraftstoffeinspritzpumpe fuer brennkraftmaschinen.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3344820 1983-12-12
DE3344820 1983-12-12
DE3442953 1984-11-24
DE19843442953 DE3442953A1 (de) 1983-12-12 1984-11-24 Kraftstoffeinspritzpumpe fuer brennkraftmaschinen

Publications (2)

Publication Number Publication Date
EP0150343A1 true EP0150343A1 (fr) 1985-08-07
EP0150343B1 EP0150343B1 (fr) 1988-05-04

Family

ID=25816355

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84114808A Expired EP0150343B1 (fr) 1983-12-12 1984-12-05 Pompe d'injection de carburant pour moteurs à combustion interne

Country Status (3)

Country Link
EP (1) EP0150343B1 (fr)
JP (1) JP2543020B2 (fr)
DE (2) DE3442953A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987005664A1 (fr) * 1986-03-22 1987-09-24 Robert Bosch Gmbh Pompe a injection de carburant pour moteurs a combustion interne

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4207275A1 (de) * 1992-03-07 1993-09-09 Kloeckner Humboldt Deutz Ag Elektromagnetischer stellantrieb

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1845600A (en) * 1928-07-12 1932-02-16 Westinghouse Electric & Mfg Co Fuel injection system
DE728166C (de) * 1937-03-16 1942-11-21 Daimler Benz Ag Vorrichtung zur Einstellung der einzelnen Kolben einer Mehrzylinderpumpe, insbesondere Brennstoff-Einspritzpumpe
DE1138982B (de) * 1961-03-17 1962-10-31 Bosch Gmbh Robert Kraftstoffeinspritzpumpe fuer Brennkraftmaschinen
US3667437A (en) * 1970-08-19 1972-06-06 Allis Chalmers Mfg Co Multiple plunger fuel injection pump
DE2149362A1 (de) * 1971-10-02 1973-04-05 Bosch Gmbh Robert Kraftstoffeinspritzpumpe fuer brennkraftmaschinen
DE2950633A1 (de) * 1979-12-15 1981-06-19 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg Einspritzpumpe fuer brennkraftmaschinen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5828587A (ja) * 1981-08-01 1983-02-19 ロ−ベルト・ボツシユ・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツング 内燃機関用の燃料噴射ポンプ

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1845600A (en) * 1928-07-12 1932-02-16 Westinghouse Electric & Mfg Co Fuel injection system
DE728166C (de) * 1937-03-16 1942-11-21 Daimler Benz Ag Vorrichtung zur Einstellung der einzelnen Kolben einer Mehrzylinderpumpe, insbesondere Brennstoff-Einspritzpumpe
DE1138982B (de) * 1961-03-17 1962-10-31 Bosch Gmbh Robert Kraftstoffeinspritzpumpe fuer Brennkraftmaschinen
US3667437A (en) * 1970-08-19 1972-06-06 Allis Chalmers Mfg Co Multiple plunger fuel injection pump
DE2149362A1 (de) * 1971-10-02 1973-04-05 Bosch Gmbh Robert Kraftstoffeinspritzpumpe fuer brennkraftmaschinen
DE2950633A1 (de) * 1979-12-15 1981-06-19 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8900 Augsburg Einspritzpumpe fuer brennkraftmaschinen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987005664A1 (fr) * 1986-03-22 1987-09-24 Robert Bosch Gmbh Pompe a injection de carburant pour moteurs a combustion interne

Also Published As

Publication number Publication date
EP0150343B1 (fr) 1988-05-04
DE3442953A1 (de) 1985-06-20
JPS60166752A (ja) 1985-08-30
JP2543020B2 (ja) 1996-10-16
DE3470911D1 (en) 1988-06-09

Similar Documents

Publication Publication Date Title
EP0325958B1 (fr) Clapet à commande hydraulique
EP0132623A2 (fr) Injecteur de combustible pour moteurs à combustion interne
DE19709794A1 (de) Ventil zum Steuern von Flüssigkeiten
EP0222131B1 (fr) Soupape électromagnétique d'injection de combustible
DE19645424C2 (de) Flußsteuerventil
DE68903791T2 (de) Ventil-uebersteuerungsmechanismus.
EP0597249B1 (fr) Dispositif d'injection de combustible, in particulier pompe-injecteur pour moteurs à combustion interne
DE3324608A1 (de) Kraftstoff-einspritzduese
EP0150343A1 (fr) Pompe d'injection de carburant pour moteurs à combustion interne
EP0133623A1 (fr) Soupape de limitation de courant de fluide
DE3942026A1 (de) Druckausgeglichenes stell- oder regelventil
EP1001196B1 (fr) Soupape de limitation de pression, en particulier pour des véhicules
EP1714026B1 (fr) Soupape d'injection de carburant
DE3508500C2 (de) Befestigung eines Kolbens auf einer Kolbenstange, insbesondere für hydraulische Teleskop-Schwingungsdämpfer
DE3004035A1 (de) Regeleinrichtung fuer eine kraftstoffeinspritzpumpe
DE3121317C2 (de) Abdichtung hin- und hergehender Maschinenteile, insbesondere Plungerdichtung
DE3430362A1 (de) Radialkolbenmotor
DE3138640C2 (fr)
DE10002720A1 (de) Ventil zum Steuern von Flüssigkeiten
DE2419613A1 (de) Steuerventil fuer hydraulische anlagen
DE8335565U1 (de) Kraftstoffeinspritzpumpe fuer brennkraftmaschinen
DE3506203C2 (fr)
EP0198166B1 (fr) Dispositif de correction pneumatique à membrane pour une pompe d'injection de combustible des moteurs à combustion interne
DE19539266A1 (de) Ventilschaftdichtung für Verbrennungskraftmaschinen
EP0645524B1 (fr) Joint de tige de soupape à monter sur un guide de tige de soupape tenu dans la culasse d'un moteur à combustion interne

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19841205

AK Designated contracting states

Designated state(s): AT DE FR GB IT

17Q First examination report despatched

Effective date: 19860728

R17C First examination report despatched (corrected)

Effective date: 19870505

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE FR GB IT

REF Corresponds to:

Ref document number: 34017

Country of ref document: AT

Date of ref document: 19880515

Kind code of ref document: T

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3470911

Country of ref document: DE

Date of ref document: 19880609

ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Effective date: 19891205

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19921229

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19940831

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: GB

Ref legal event code: 746

Effective date: 19951207

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20021202

Year of fee payment: 19

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20030127

Year of fee payment: 19

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20031205

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040701

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20031205