EP0461213A1 - Pompe d'injection de carburant pour moteurs a combustion interne. - Google Patents

Pompe d'injection de carburant pour moteurs a combustion interne.

Info

Publication number
EP0461213A1
EP0461213A1 EP19900916706 EP90916706A EP0461213A1 EP 0461213 A1 EP0461213 A1 EP 0461213A1 EP 19900916706 EP19900916706 EP 19900916706 EP 90916706 A EP90916706 A EP 90916706A EP 0461213 A1 EP0461213 A1 EP 0461213A1
Authority
EP
European Patent Office
Prior art keywords
lubricating oil
claw
drive shaft
coupling
drive
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
EP19900916706
Other languages
German (de)
English (en)
Other versions
EP0461213B1 (fr
Inventor
Helmut Laufer
Wolfgang Fehlmann
Ewald Eblen
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
Publication of EP0461213A1 publication Critical patent/EP0461213A1/fr
Application granted granted Critical
Publication of EP0461213B1 publication Critical patent/EP0461213B1/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
    • F02M59/44—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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M39/00—Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements
    • F02M39/02—Arrangements of fuel-injection apparatus to facilitate the driving of pumps; Arrangements of fuel-injection pumps; Pump drives
    • 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
    • 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
    • F02M41/123—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 characterised by means for varying fuel delivery or injection timing
    • F02M41/125—Variably-timed valves controlling fuel passages
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0001—Fuel-injection apparatus with specially arranged lubricating system, e.g. by fuel oil

Definitions

  • the invention relates to a fuel injection pump for internal combustion engines of the type defined in the preamble of claim 1.
  • the fuel injection pump according to the invention with the characterizing features of claim 1 has the advantage that, due to the fact that the engine compartment is only partially filled with lubricant, the limit speed of the cam engine is very high and even in the area of the high drive speed of the drive shaft, which is close to the limit speed, the highly loaded drive surfaces of the drive shaft Claw clutch are adequately lubricated. The service life of the fuel injection pump increases drastically.
  • the measures listed in the further claims allow advantageous developments and improvements of the fuel injection pump specified in claim 1, the term "lubricating oil” being used as a synonym for all types of lubricating liquids and preferably engine oil being used.
  • the lubricating oil pump which is forced by the lubricating oil pump, from the lubricating oil groove to the lubricating openings in the claw surfaces of the claw coupling is realized in a particularly advantageous manner according to a preferred embodiment of the invention in that the drive shaft has an axial blind bore which is connected to the lubricating oil groove via a radial bore and is closed on the mouth side is. Oblique bores lead from the blind bore into the drive claws of the drive shaft, which are closed at the end.
  • a distributor bore leads from each oblique bore into those claw surfaces of the drive claws which transmit a torque in the intended direction of rotation of the drive shaft.
  • the mouth openings of the distributor holes in the 5 claw surfaces form the lubricating oil openings.
  • second distributor bores run in the clutch disc, which extend from the claw surfaces of the coupling claws that bear against the claw surfaces of the 5 drive claws that support the lubricating oil openings, up to the claw surfaces that lead in the direction of rotation extend the same coupling claw.
  • first distributor bores lead from all claw surfaces of the drive claws to the oblique bores and form the desired lubricating oil openings with their mouth openings in the claw surfaces.
  • all coupling claws are crossed with second distributor bores, each of which opens into the two claw surfaces delimiting the coupling claw and there in each case a lubricating oil opening realize.
  • all claw surfaces are supplied with lubricating oil, regardless of whether or not they are loaded in the current direction of rotation of the drive shaft. This has the advantage that the fuel injection pump can be used for both directions of rotation of the drive shaft and separate storage for left and right rotation of the drive shaft is avoided.
  • the oil escaping from the claw surfaces is thrown outwards by the centrifugal force and lubricates the rollers of the engine.
  • the lubricating oil circuit is maintained by a feed pump which is driven either by the drive shaft or by a separate electric motor and is generally already present in the oil circuit of the internal combustion engine.
  • the lubricating oil circuit required for lubricating the drive shaft and dog clutch can also be used to control the injection adjuster.
  • the control chamber delimited by the injection adjustment piston is connected to the lubricating oil circuit via a throttle and is in turn connected to the engine compartment via an electromagnetically actuated check valve.
  • the electromagnetic check valve is actuated in a clocked manner.
  • the roller ring of the cam engine is installed in such a position that when the injection adjuster is depressurized, the start of delivery, based on the rotational position of the drive shaft, is "early".
  • FIG. 1 shows a schematic illustration of a fuel injection pump for an internal combustion engine
  • Fig. 2 is a perspective view of a
  • Fig. 3 is a side view of a drive shaft of the
  • FIG. 5 shows a section of a coupling disk of the dog clutch in FIG. 2,
  • Fig. 6 is the same representation as in Fig. 5 of a coupling plate according to another embodiment.
  • a pump piston 11 also serving as a distributor is set into a reciprocating and simultaneously rotating movement by a drive shaft 12 and by means of a cam engine or cam gear 13.
  • the pressure stroke of the pump piston 11 is from a pump working space 14 delimited by the pump piston 11 via a Longitudinal distributor groove 15 delivers fuel to one of several pressure channels 16, which are arranged around the pump piston 11 at regular intervals of rotation and each lead to an injection valve assigned to a combustion chamber of the internal combustion engine.
  • the pump work chamber 14 is supplied with fuel by a fuel delivery pump 17, which draws fuel from a fuel tank 18, via a solenoid valve 19.
  • the solenoid valve 19 is open and is switched into its blocking position at the beginning of the delivery or pressure stroke.
  • the drive shaft 12 is mounted in the pump housing 10 by means of two spaced plain bearings 21, 22 and, like the end of the pump piston 11 remote from the pump work chamber 14, projects into an engine chamber 20 which accommodates the cam gear 13.
  • the cam gear 13 has, in a known manner, a cam or lifting disk 23, which is non-rotatably connected to the pump piston 11 and, on its underside facing away from the pump piston 11, bears a number of elevations or cams 24 corresponding to the number of pressure channels 16, which are the same Angle of rotation are arranged offset.
  • a roller ring 25 arranged coaxially to the lifting disk 23 is held in the pump housing 10 so that it can be rotated by a certain angle.
  • rollers 26 are rotatably mounted on which the cam-reinforced
  • the roller ring 25 is coupled in a rotationally locking manner to an injection adjusting piston 28 of an injection adjuster 30 via an adjusting bolt 27.
  • the injection adjusting piston 28 delimits a control chamber 29 and is closed by
  • roller ring 25 Pressurization of the control chamber 29 moved against the force of a return spring 31, the roller ring 25 being rotated via the adjusting bolt 27. With the rotation of the roller ring 25, the start of the stroke of the pump piston 11 and thus the start of delivery of the fuel in relation to the Rotational position of the drive shaft 12 adjusted to "earlier". Roller ring 25 with rollers 26 and spray adjuster 30 are shown rotated by 90 ° in the drawing plane in FIG. 1.
  • the cam gear 13 also includes a dog clutch 32, which transmits the rotary motion of the drive shaft 12 to the pump piston 11 irrespective of the axial stroke position of the latter.
  • the claw coupling 32 consists of two drive claws 33, 34 that are connected in a rotationally fixed manner to the drive shaft 12, two output claws 35, 36 that are connected in a rotationally fixed manner to the lifting disk 23 and that are opposite the drive claws 33, 34 in the direction of rotation of the drive shaft 12 are offset by 90 °, and from a cross plate 40 with four segment-like coupling claws 41-44, which lie between the drive claws 33, 34 and output claws 35, 36 and produce a rotationally fixed connection between them.
  • the cross disk 40 with the drive claws 33, 34 and output claws 35, 36 engaging in it lies in the interior of the roller ring 25.
  • a lubricating oil circuit has a lubricating oil container 45, from which a lubricating oil pump 46 delivers lubricating oil into a lubricating oil supply line 47.
  • Lubricating oil supply line 47 opens into a lubricating oil groove 48 formed in the pump housing 10 on the drive shaft 12 between the two slide bearings 21, 22 as an annular groove.
  • a lubricating oil return line 49 connects a drain opening 37 in the engine compartment 20 to the lubricating oil reservoir 45.
  • An inflow opening 38 in the engine compartment 20 is via a second / 2-way solenoid valve 50 connected to the lubricating oil supply line 47, to which the control chamber 29 of the hydraulic spray adjuster 30 is also connected via a line section 39.
  • a throttle valve 51 is switched on between the connection point of the power section 39 and the lubricating oil pump 46.
  • a lubricating oil collecting groove 52 is provided, which is sealed on the end face and is connected to the engine compartment 20 via a return bore 53.
  • the lubricating oil supplied by the Schmie_röl umpe 46 of the lubricating oil groove 48 passes through the two sliding bearings 21, 22 and arrives directly or via the lubricating oil collecting groove 52 and the return bore 53 into the engine compartment 20.
  • Its drain opening 37 is arranged such that the engine compartment 20 only contains lubricating oil is partially filled. This only partially fills the engine room 20
  • cam gear 13 has a high limit speed.
  • the speed limit of the drive shaft 12 is defined as the limit speed at which the lifting disk 23 lifts off the rollers 26 of the roller ring 25 and the exact lifting function of the pump piston 11 is no longer guaranteed.
  • a lubricating oil flow from the lubricating oil groove 48 through the drive shaft 12 is provided directly to the claw clutch 32, which exits via lubricating oil openings in the claw surfaces of the claw clutch 32 and into the engine room 20 flows away. It is sufficient to provide lubricating oil openings in those claw surfaces of the claw clutch 32 that have to transmit the torque in the fixed direction of rotation of the drive shaft 12.
  • Drive claws 33, 34 bearing end face introduced an axial blind bore 54, which near the bottom of the sack via a radial bore 55 in the drive shaft 12 with the Lubricating oil groove 48 is connected and is closed on the end face of the drive shaft 12 by a ball 56.
  • an oblique bore 57 or 58 is introduced, which opens into the blind bore 54 and is closed at the end by a ball 59 or 60.
  • a first distributor bore 61 or 62 leads to that claw surface 33a or 34a of the drive claw 33 or 34 which is at the front in the direction of rotation of the drive shaft 12 (arrow 63 in FIG.
  • the distribution bore 61 can be seen extended in the sectional view of the drive claw 34 in FIG. 4, while it is indicated in dashed lines in the sectional view of the cross disk 40 according to FIG. 5.
  • the mouth openings of the first distributor bores 61, 62 form the aforementioned lubricating oil openings 64, 65 in the claw surfaces 33a and 34a.
  • second distributor bores 66, 67 each lead to the other claw surface 41a, 43a of the coupling claws 41, 43.
  • the hydraulic spray adjuster 30 is controlled by means of the lubricating oil circuit to adjust the start of the stroke of the pump piston 11 and thus the start of delivery relative to the rotational position of the drive shaft 12.
  • the solenoid valve 50 is actuated in a clocked manner in such a way that the start of delivery is adjusted to "early" at full load and to "late” at partial load.
  • the roller ring 25 Since there is no engine oil pressure at the start of the internal combustion engine, the roller ring 25 is installed with respect to the rotational position of the drive shaft 12 in such a spatial installation position that when the control chamber 29 of the injection adjuster 30 is depressurized, the roller ring 25 assumes such a position that when the internal combustion engine starts cold, delivery begins Pump piston 11 is at "early”.
  • the spray adjustment piston 28 can thus be adjusted with the engine oil pressure from the idling speed.
  • the required late position is achieved Moving the start of delivery determined by closing the solenoid valve 19 with respect to the rotational position of the pump piston 11 is reached.
  • Lubricating oil supply line 47 connect the feed pump 46 directly to the lubricating oil groove 48.
  • the throttle valve 51 then becomes the common connection point of
  • Line section 39 upstream of the control chamber 29 of the spray adjuster 30 and from the solenoid valve 50 on the lubricating oil supply line 47 to the lubricating oil supply line 47.
  • the lubricating oil container 45 can be omitted if the feed pump 46 is connected directly to the lubricating oil return line 49 on the input side. In this case, the engine room 20 takes over the function of
  • Lubricating oil container 45 The engine room 20 is then included in the engine oil circuit of the internal combustion engine by a separate inlet and a separate outlet.
  • the feed pump 46 is expediently driven by the drive shaft 12.
  • the speed-dependent lubricating oil pressure in the engine compartment 20 can also be controlled by means of a pressure control valve.

Landscapes

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

Abstract

Une pompe d'injection de carburant pour moteurs à combustion interne présente un corps de pompe (10), un piston distributeur (11) mené de manière axiale et rotative, un arbre de commande (12) tournant dans le corps de pompe (10), un équipage mobile (13) accouplant l'arbre de commande (12) au piston distributeur (11) avec unaccouplement à griffes (32) et avec un disque à cames (23) roulant sur une bague porte-galets (25) munie de cames (26) ainsi qu'un circuit de graissage avec une arrivée d'huile de graissage (47) débouchant dans une rainure de graissage (48) et une conduite de retour (49) pour l'huile de graissage provenant du compartiment (20) partiellement rempli d'huile de l'équipage mobile. Pour assurer une alimentation suffisante en huile de graissage des surfaces d'entraînement hautement sollicitées de l'accouplement à griffes (32), un flux d'huile passe à travers l'arbre de commande (12) depuis la rainure de graissage (48) jusque dans l'accouplement à griffes (32) et sort par les orifices de graissage (64, 65, 68, 69) dans le compartiment (20) de l'équipage mobile dans au moins les surfaces à griffes de l'accouplement (32) qui transmettent une force de rotation.
EP90916706A 1989-12-29 1990-11-24 Pompe d'injection de carburant pour moteurs a combustion interne Expired - Lifetime EP0461213B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3943299A DE3943299A1 (de) 1989-12-29 1989-12-29 Kraftstoffeinspritzpumpe fuer brennkraftmaschinen
DE3943299 1989-12-29

Publications (2)

Publication Number Publication Date
EP0461213A1 true EP0461213A1 (fr) 1991-12-18
EP0461213B1 EP0461213B1 (fr) 1993-11-03

Family

ID=6396608

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90916706A Expired - Lifetime EP0461213B1 (fr) 1989-12-29 1990-11-24 Pompe d'injection de carburant pour moteurs a combustion interne

Country Status (5)

Country Link
US (1) US5146895A (fr)
EP (1) EP0461213B1 (fr)
JP (1) JP3051164B2 (fr)
DE (2) DE3943299A1 (fr)
WO (1) WO1991010063A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19739653A1 (de) * 1997-09-10 1999-03-11 Bosch Gmbh Robert Verfahren zum Erzeugen von unter Hochdruck stehendem Kraftstoff sowie System zur Kraftstoffhochdruckerzeugung
DE19801355B4 (de) * 1998-01-16 2004-04-08 Robert Bosch Gmbh Hochdruckpumpe zur Kraftstoffversorgung bei Kraftstoffeinspritzsystemen von Brennkraftmaschinen
DE10155522C1 (de) * 2001-11-12 2003-04-03 Bosch Gmbh Robert Verteilereinspritzpumpe mit vorgespanntem Kraftübertragungselement
JP3852753B2 (ja) * 2001-12-04 2006-12-06 株式会社デンソー 燃料噴射ポンプ
US6668797B2 (en) * 2002-05-13 2003-12-30 Advanced Vehicle Technologies Fuel injection pump system
DE102005033638A1 (de) * 2005-07-19 2007-01-25 Robert Bosch Gmbh Kraftstoff-Fördereinrichtung, insbesondere für eine Brennkraftmaschine
DE102010041429A1 (de) 2010-09-27 2012-03-29 Robert Bosch Gmbh Kreuzscheibenkupplung sowie Kraftstoffhochdruckpumpe mit einer Kreuzscheibenkupplung
JP6411313B2 (ja) * 2015-11-26 2018-10-24 ヤンマー株式会社 燃料噴射ポンプ
CN117738826B (zh) * 2024-02-19 2024-05-03 江苏中奕和创智能科技有限公司 一种带有控油组件的柴油发电机

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1413117A (en) * 1921-07-09 1922-04-18 Higgins Eugene Shaft coupling
US2670684A (en) * 1950-01-21 1954-03-02 Volvo Ab Fuel injection device for internalcombustion engines
GB1562019A (en) * 1977-03-18 1980-03-05 Davy Loewy Ltd Splinedarticulated coupling
US4493623A (en) * 1983-02-22 1985-01-15 Chandler Evans Inc. Oil lubricated main drive shaft for fuel pump
DE3410911A1 (de) * 1983-04-06 1984-10-11 Ernst Dipl.-Ing. 4600 Dortmund Korthaus Kolbenpumpe
JPH0212299Y2 (fr) * 1984-12-28 1990-04-06
JPH034780Y2 (fr) * 1985-02-22 1991-02-07
DE3704578A1 (de) * 1987-02-13 1988-08-25 Bosch Gmbh Robert Kraftstoffeinspritzpumpe fuer brennkraftmaschinen
US5000668A (en) * 1988-04-27 1991-03-19 Diesel Kiki Co., Ltd. Distribution-type fuel injection pump
DE3819996A1 (de) * 1988-06-11 1989-12-14 Bosch Gmbh Robert Hydraulische steuereinrichtung insbesondere fuer kraftstoffeinspritzanlagen von brennkraftmaschinen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9110063A1 *

Also Published As

Publication number Publication date
WO1991010063A1 (fr) 1991-07-11
DE3943299A1 (de) 1991-07-04
EP0461213B1 (fr) 1993-11-03
US5146895A (en) 1992-09-15
JPH04504748A (ja) 1992-08-20
DE59003366D1 (de) 1993-12-09
JP3051164B2 (ja) 2000-06-12

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