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WO2014086521A1 - Pompe, en particulier pompe à carburant à haute pression pour un moteur à combustion interne - Google Patents

Pompe, en particulier pompe à carburant à haute pression pour un moteur à combustion interne Download PDF

Info

Publication number
WO2014086521A1
WO2014086521A1 PCT/EP2013/071265 EP2013071265W WO2014086521A1 WO 2014086521 A1 WO2014086521 A1 WO 2014086521A1 EP 2013071265 W EP2013071265 W EP 2013071265W WO 2014086521 A1 WO2014086521 A1 WO 2014086521A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing
pump
housing
bypass
throttle
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/EP2013/071265
Other languages
German (de)
English (en)
Inventor
Matthias Greiner
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 CN201380063417.6A priority Critical patent/CN104822935B/zh
Publication of WO2014086521A1 publication Critical patent/WO2014086521A1/fr
Anticipated expiration legal-status Critical
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
    • 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
    • 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
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C17/00—Sliding-contact bearings for exclusively rotary movement
    • F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/90—Selection of particular materials
    • F02M2200/9015—Elastomeric or plastic materials
    • 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
    • F02M59/445—Selection of particular materials

Definitions

  • the present invention relates to a pump, in particular
  • High-pressure fuel pump for an internal combustion engine comprising
  • Housing flange with a mounted in the pump housing and the housing flange in bearings in the form of a flange bearing and a housing bearing pump shaft, wherein at least one bearing is traversed by a fluid to form a bearing throttle for lubrication of the bearing and cooling the pump.
  • Such a pump is known from DE 10 2010 027 960 A1.
  • This pump is a high-pressure fuel pump for an internal combustion engine, with the fuel is conveyed into a high-pressure accumulator.
  • This funded in the high-pressure accumulator fuel is taken from fuel injectors for injection into the associated combustion chambers of the engine high-pressure accumulator.
  • the thus formed fuel injection system is a common rail injection system for diesel fuel.
  • a pump shaft is mounted, which is mounted in a housing mounting and a flange bearing.
  • the housing mounting and the flange bearing are also designed as throttles, which determine a flow of fluid through the two bearings. The fluid flowing through the bearings is then returned to a tank.
  • the pump formed in this way has a so-called cooling quantity throttle, which likewise connects the pump interior with a return line to the tank independently of the bearings.
  • Thisdemengendrossel is the one flow rate and thus the cooling of the high-pressure fuel pump constituent component.
  • the invention has for its object to provide a pump whose lubrication and cooling is improved in a simple structural design.
  • Flow rate determining component is and that the bearing throttle is set to a flow rate for the pump a set flow value.
  • This embodiment ensures that the flow of fluid through at least one bearing of the pump is accurately determined by the bearing throttle. In this case, so far, the flow through the bearing throttle was subject to significant fluctuations, so that no defined flow was given. As a result, at a low flow, the lubrication and cooling of the at least one bearing is impaired, while at high flow, for example, a subsequent shaft seal, which is provided to seal the pump relative to the environment in the region of the pump shaft, high loads.
  • Embodiment can be implemented on any pump, but preferably the pump is a high-pressure fuel pump of a fuel injection system an internal combustion engine and the fluid is fuel, in particular
  • the corresponding amount of cooling is to be provided by the arranged in the pump housing and the housing flange bearing as a total amount.
  • the flow rates flowing through the two bearings can be set to the same values or else to different values.
  • the bearing has a flow rate determining game.
  • the bearing clearance it may be necessary to slightly increase the bearing clearance over known solutions, in which case a range between 5 and 10 ⁇ comes into question.
  • the maximum bearing clearance remains unchanged or is slightly increased, for example in the range of 2 to 5 ⁇ , in order to generate any cavitation effects in the camps.
  • the tolerance of the bearing clearance of the bearing is thus narrowed slightly.
  • this slight narrowing of the bearing clearance makes no in the production of bearings
  • the bearing has a bypass.
  • This bypass makes it possible to leave the minimum clearance unchanged as in known solutions and divide the bearing thrust in their function, namely in a throttle, which is determined by the bearing clearance and a throttle, which is determined by the bypass.
  • This embodiment is also cost feasible, since such a bypass can be made with simple means.
  • the bypass is formed as a groove and / or a diaphragm, which is arranged for example in a cutout.
  • the bearing has at least one
  • Bearing shell and the bypass is arranged in a bearing back of the bearing shell.
  • the bypass can also be arranged in a peek layer of the bearing shell.
  • the Peek Mrs is the actual sliding surface of the bearing shell, which cooperates with the pump shaft.
  • the peek layer can contain special particles or constituents which improve the lubricity of the pump shaft with respect to the peek layer.
  • the bypass is arranged in a latch on the inside of the bearing shell.
  • This embodiment has the advantage that so-called peek throws can no longer occur due to the latching.
  • the bypass is introduced in the unrolled state into the bearing shell.
  • This embodiment can be implemented both in the attachment of the bypass in the bearing back and in the peek layer.
  • High-pressure fuel pump is installed, wherein the bearing shell has a arranged in a bearing back bypass in the form of a groove, a bearing shell similar to Figure 2, wherein in a bearing back of the bearing shell a cutout is incorporated with an end panel, and a bearing shell, in which a cutout and a diaphragm is arranged in a peek layer of the bearing shell in the region of a latching of the bearing shell.
  • FIG. 1 schematically shows a pump designed as a high-pressure fuel pump 1 with its pump interior 2 arranged in a pump housing 3.
  • a pump shaft 4 having a cam 5 is mounted in a flange bearing 6 and a housing bearing 7.
  • the flange bearing 6 and the housing bearing 7 are at the same time as bearing throttles 8a, 8b for fluid flowing through, namely fuel, in particular
  • Diesel fuel formed by, for example, the bearing clearance is designed accordingly or the bearings have a corresponding bypass.
  • the high-pressure fuel pump 1 is part of a common rail fuel injection system, with which the fuel in combustion chambers of a
  • High-pressure fuel pump 1 conveyed fuel into a high-pressure accumulator, from which the fuel stored there is taken from injectors for injection into the combustion chambers controlled.
  • the pump interior 2 is operated, for example, by an electrically operated one
  • High-pressure fuel pump 1 supplied. A subset of the supplied fuel
  • Fuel quantity is conveyed via the flange bearing 6 or the bearing throttle 8a and the housing bearing 7 or the bearing throttle 8b in a return line 1 1, which preferably opens into the tank 12.
  • Amount of fuel is introduced via a metering unit 13 or an electrically operated suction valve in a pump working space of a high-pressure pump element 14.
  • the high-pressure pump element 14 cooperates via a roller tappet with the cam 5, which may otherwise be a single cam or a multiple cam, and conveys the fuel during a rotational movement of the cam 5, which may otherwise be a single cam or a multiple cam, and conveys the fuel during a rotational movement of the
  • FIG. 2 shows a bearing shell 15 of the flange stopper 6 or of the housing bearing 7. The bearing shell 15 is pushed onto the pump shaft 4 and rotationally fixed in a bearing recess of the pump housing 3
  • the bearing recess is formed for example as a blind hole and connected to an end-side channel, which opens into the return line 11.
  • the bearing bore is formed as a through hole through which the pump shaft 4 protrudes with a drive section.
  • the drive section has, for example, an attached drive gear, which in a crankcase of the
  • Internal combustion engine protrudes and meshes with a gear of the internal combustion engine.
  • the guided through the flange 6 through the fuel is collected in a suitable form and introduced into the return line 11.
  • a groove 17 is incorporated, which forms a bypass.
  • the groove 17 is dimensioned such that along a flow connection between the pump shaft 4 and the bearing shell 15 and through the groove 17, a previously defined amount of fuel flows.
  • a cutout 18, which cooperates at the end with an aperture 17a, is embedded in the bearing back 16 of the bearing shell 15.
  • the aperture 17a determines the flow through the recessed into the bearing back 16 flow connection analogous to the groove 17.
  • the bypass is arranged in the region of a latch 19 of the bearing shell 15.
  • the Verklinkung 19 represents the connection level of the rolled to a cylindrical bearing shell 15 bearing shell workpiece.
  • the bypass may be formed as a groove or as shown at the end of a cutout 18 arranged aperture 17a.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne une pompe, en particulier une pompe à carburant à haute pression (1) pour un moteur à combustion interne, présentant un carter (3) de pompe et une bride formant une partie du carter (3) de pompe, pourvue d'un arbre (4) de pompe monté dans des paliers sous la forme d'un palier de carter (7) et d'un palier de bride (6) autour de la bride dans le carter (3), au moins un palier étant parcouru par un fluide en formant un étranglement (8a, 8b) de palier. Selon l'invention, une pompe de conception structurale simple dont la lubrification et le refroidissement sont améliorés est produite. Ce but est atteint du fait que l'étranglement (8a, 8b) de palier est l'élément déterminant le débit de passage et du fait que l'étranglement (8a, 8b) de palier est réglé sur une valeur de débit déterminant la quantité de refroidissement pour la pompe. À cet effet, un évidement (18) pourvu d'un obturateur (17a) est pratiqué dans une couche peek (20) d'un coussinet (15) d'un palier.
PCT/EP2013/071265 2012-12-04 2013-10-11 Pompe, en particulier pompe à carburant à haute pression pour un moteur à combustion interne Ceased WO2014086521A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201380063417.6A CN104822935B (zh) 2012-12-04 2013-10-11 泵，尤其是用于内燃机的燃料高压泵

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012222134.4 2012-12-04
DE102012222134.4A DE102012222134A1 (de) 2012-12-04 2012-12-04 Pumpe, insbesondere Kraftstoffhochdruckpumpe für eine Brennkraftmaschine

Publications (1)

Publication Number Publication Date
WO2014086521A1 true WO2014086521A1 (fr) 2014-06-12

Family

ID=49378265

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/071265 Ceased WO2014086521A1 (fr) 2012-12-04 2013-10-11 Pompe, en particulier pompe à carburant à haute pression pour un moteur à combustion interne

Country Status (3)

Country Link
CN (1) CN104822935B (fr)
DE (1) DE102012222134A1 (fr)
WO (1) WO2014086521A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018204400A1 (de) 2018-03-22 2019-09-26 Robert Bosch Gmbh Lagerbuchse, insbesondere Gleitlagerbuchse

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006052485A1 (de) * 2006-11-07 2008-05-08 Robert Bosch Gmbh Kraftstoffpumpe für ein Kraftstoffsystem einer Brennkraftmaschine
DE102009026717A1 (de) * 2009-06-04 2010-12-09 Robert Bosch Gmbh Kraftstoffhochdruckpumpe
DE102010027960A1 (de) 2010-04-20 2011-10-20 Robert Bosch Gmbh Pumpenanordnung
DE102010042587A1 (de) * 2010-10-18 2012-04-19 Robert Bosch Gmbh Kraftstoffpumpe für ein Kraftstoffeinspritzsystem einer Brennkraftmaschine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10259178A1 (de) * 2002-12-18 2004-07-08 Robert Bosch Gmbh Hochdruckpumpe für eine Kraftstoffspritzeinrichtung einer Brennkraftmaschine
IT1397725B1 (it) * 2009-12-22 2013-01-24 Bosch Gmbh Robert Impianto di alimentazione del carburante da un serbatoio ad un motore a combustione interna.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006052485A1 (de) * 2006-11-07 2008-05-08 Robert Bosch Gmbh Kraftstoffpumpe für ein Kraftstoffsystem einer Brennkraftmaschine
DE102009026717A1 (de) * 2009-06-04 2010-12-09 Robert Bosch Gmbh Kraftstoffhochdruckpumpe
DE102010027960A1 (de) 2010-04-20 2011-10-20 Robert Bosch Gmbh Pumpenanordnung
DE102010042587A1 (de) * 2010-10-18 2012-04-19 Robert Bosch Gmbh Kraftstoffpumpe für ein Kraftstoffeinspritzsystem einer Brennkraftmaschine

Also Published As

Publication number Publication date
CN104822935A (zh) 2015-08-05
CN104822935B (zh) 2018-10-09
DE102012222134A1 (de) 2014-06-05

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