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EP0774068A1 - Pompe a injection pour moteur diesel - Google Patents

Pompe a injection pour moteur diesel

Info

Publication number
EP0774068A1
EP0774068A1 EP94910406A EP94910406A EP0774068A1 EP 0774068 A1 EP0774068 A1 EP 0774068A1 EP 94910406 A EP94910406 A EP 94910406A EP 94910406 A EP94910406 A EP 94910406A EP 0774068 A1 EP0774068 A1 EP 0774068A1
Authority
EP
European Patent Office
Prior art keywords
pump
foot
rocker arm
pressure roller
pump 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
Application number
EP94910406A
Other languages
German (de)
English (en)
Other versions
EP0774068B1 (fr
Inventor
Günter Kampichler
Herbert Geier
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.)
Motorenfabrik Hatz GmbH and Co KG
Original Assignee
Motorenfabrik Hatz GmbH and Co KG
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 Motorenfabrik Hatz GmbH and Co KG filed Critical Motorenfabrik Hatz GmbH and Co KG
Publication of EP0774068A1 publication Critical patent/EP0774068A1/fr
Application granted granted Critical
Publication of EP0774068B1 publication Critical patent/EP0774068B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition

Definitions

  • the invention relates to an injection pump for a diesel engine with a pump piston guided in the pump cylinder, which has a widened foot and is actuated by means of a spring-loaded rocker arm driven by the camshaft.
  • the present invention has for its object to make an injection pump of the type mentioned simpler and therefore less expensive, if possible to reduce the number of individual components and also to reduce the construction volume.
  • a preferred embodiment consists in that a pressure roller actuating the pump piston is provided at the end of the rocker arm; this is expediently composed of an outer and an inner roller, which are coaxially fitted closely together and thus allow a certain tolerance compensation via an oil film in the space between the rollers.
  • a pressure roller actuating the pump piston is provided at the end of the rocker arm; this is expediently composed of an outer and an inner roller, which are coaxially fitted closely together and thus allow a certain tolerance compensation via an oil film in the space between the rollers.
  • the driver is pivotally attached to the end of the rocker arm for assembly purposes and, in the final installation position, grips a widened foot of the pump piston with a catch plate such that the foot is received between the catch plate and the pressure roller. In order to avoid friction and constraints, it is provided that the foot is accommodated with little play between the catch plate and the pressure roller.
  • the invention dispenses with the central projection which is usually provided there as a stop surface in favor of a corresponding widening of the foot surface (so-called pressure sun), whereby an advantageous line contact is achieved with the pressure roller.
  • FIG. 1 in a schematic representation
  • a rocker arm 3 for driving the injection pump 4 is associated with the camshaft 1 of a diesel engine.
  • the crankshaft 5 engages via a pinion drawn as a pitch circle 6 with a toothing drawn as a pitch circle 7, which in turn drives the camshaft 1.
  • the rocker arms 8, 9 for the exhaust valve and the inlet valve are actuated.
  • the rocker arm 3 for actuating the injection pump 4 has at its camshaft end a counter cam 10, on the other hand a compression spring 11 is supported on the rocker arm 3, which causes the counter cam 10 to always keep contact with the cam 2 of the camshaft 1.
  • the rocker arm 3 pivots about its motor-fixed axis of rotation 12; the extension of the rocker arm 3 beyond the axis of rotation 12 ends with a fork part 13, on which a pressure roller 15, consisting of an outer roller 16 and an inner roller 17, is rotatably mounted about a transverse pin 14.
  • the associated end of the pump piston 19 is supported on the pressure roller 15 via a widened foot 18.
  • the foot 18 is held with a tight play between 0.05 and 0.1 mm between the pressure roller 17 and a driver 20 which is also pivotably mounted about the transverse axis 14 and whose catch plate 21 is arranged on the top of the piston foot 18.
  • the pump piston 19 is guided linearly in the pump cylinder 22 surrounding it with a bore 23 for the fuel supply and a bore 24 for the fuel return line.
  • the usual control cams 25 are provided at the inner end of the pump piston 19, for the adjustment of which a control device 26, which is shown in more detail in FIG. 2, is used.
  • the pump piston 19 is rotated about its longitudinal axis in the sense of the double arrow 27 by means of the control device 26. The rotation takes place by means of a push rod 28, between the guide disks 29, the adjusting bolt 30 received between them and with this a pivotally connected to the pump piston 19 pivot part 31 is actuated.
  • the pump cylinder 22 is formed in the upper part as a valve support with the valves 32, 33 and is seated in a bore 34 of a pipe connection piece 35 which contains the fuel pressure line 36.
  • the catch plate 21 of the driver 20 has openings 37 on one side through which the piston foot 18 can be threaded before the catch plate 21 is pivoted over the foot 18 into the end position shown in the direction of the arrow 38.

Landscapes

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

Abstract

Une pompe d'injection (4) pour un moteur diesel comprend un piston (19) guidé dans le cylindre (22) de la pompe et actionnable par un entraînement à cames. L'entrainement à cames est constitué d'un basculeur (3) sollicité par un ressort et actionné par l'arbre à cames (1). L'extrémité côté pompe du basculeur (3) coopère directement avec l'extrémité associée du piston (19) de la pompe. Les extrémités sont reliées l'une à l'autre, avec un certain jeu, par un toc d'entraînement (20).
EP94910406A 1993-03-11 1994-03-10 Pompe a injection pour moteur diesel Expired - Lifetime EP0774068B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4307699 1993-03-11
DE4307699A DE4307699C2 (de) 1993-03-11 1993-03-11 Einspritzpumpe für Dieselmotor
PCT/EP1994/000746 WO1994020748A1 (fr) 1993-03-11 1994-03-10 Pompe d'injection pour moteurs diesel

Publications (2)

Publication Number Publication Date
EP0774068A1 true EP0774068A1 (fr) 1997-05-21
EP0774068B1 EP0774068B1 (fr) 1998-06-10

Family

ID=6482510

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94910406A Expired - Lifetime EP0774068B1 (fr) 1993-03-11 1994-03-10 Pompe a injection pour moteur diesel

Country Status (6)

Country Link
EP (1) EP0774068B1 (fr)
JP (1) JP3476822B2 (fr)
CN (1) CN1035125C (fr)
AU (1) AU6283994A (fr)
DE (2) DE4307699C2 (fr)
WO (1) WO1994020748A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5957673A (en) * 1993-03-11 1999-09-28 Motorenfabrik Hatz Gmbh & Co. Kg. Injection pump for diesel engines
SE501026C2 (sv) * 1993-03-17 1994-10-24 Volvo Ab Bränsleinsprutningsanordning för förbränningsmotorer
US5588413A (en) * 1995-03-14 1996-12-31 Caterpillar Inc. Engine assembly with leaf spring cam follower
WO2013098883A1 (fr) * 2011-12-27 2013-07-04 トヨタ自動車株式会社 Dispositif d'entraînement
CN102953952A (zh) * 2012-11-22 2013-03-06 无锡惠山泵业有限公司 机动车引擎上的油泵
CN102953971B (zh) * 2012-11-22 2016-04-06 江苏高博智融科技有限公司 延寿油泵
CN102953954A (zh) * 2012-11-22 2013-03-06 无锡惠山泵业有限公司 电动油泵
DE102014223597B4 (de) * 2014-10-08 2019-02-07 Continental Automotive Gmbh Rolle für einen Rollenstößel einer Kraftstoffhochdruckpumpe, Rollenstößel, Kraftstoffhochdruckpumpe und Brennkraftmaschine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1451228A (en) * 1919-07-26 1923-04-10 Dodge Tool Company Fuel-feeding device for internal-combustion engines
DE408310C (de) * 1922-11-14 1925-01-10 Steiner Carl Ventilsteuerung mit winkelfoermigem Kipphebel, insbesondere fuer Verbrennungskraftmaschinen
GB294427A (en) * 1927-12-15 1928-07-26 Edward Ronald D Alessio Improvements in and relating to valve-operating mechanism in internal combustion engines
US2424943A (en) * 1943-02-26 1947-07-29 Cav Ltd Fuel pump
CH348289A (fr) * 1958-08-02 1960-08-15 Cardelli Dino Pompe à injection pour moteur à combustion interne
DE1919993A1 (de) * 1969-04-19 1970-11-05 Volkswagenwerk Ag Halter fuer Schwinghebel von Ventilsteuerungen
AT366474B (de) * 1979-10-15 1982-04-13 Friedmann & Maier Ag Einspritzpumpe fuer brennkraftmaschinen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9420748A1 *

Also Published As

Publication number Publication date
DE59406244D1 (de) 1998-07-16
DE4307699A1 (de) 1994-09-15
EP0774068B1 (fr) 1998-06-10
JP3476822B2 (ja) 2003-12-10
WO1994020748A1 (fr) 1994-09-15
CN1119034A (zh) 1996-03-20
AU6283994A (en) 1994-09-26
CN1035125C (zh) 1997-06-11
JPH08510026A (ja) 1996-10-22
DE4307699C2 (de) 1996-03-28

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