EP0752061A1 - Systeme permettant d'injecter du carburant dans les cylindres d'un moteur a combustion interne - Google Patents

Systeme permettant d'injecter du carburant dans les cylindres d'un moteur a combustion interne

Info

Publication number
EP0752061A1
EP0752061A1 EP95911205A EP95911205A EP0752061A1 EP 0752061 A1 EP0752061 A1 EP 0752061A1 EP 95911205 A EP95911205 A EP 95911205A EP 95911205 A EP95911205 A EP 95911205A EP 0752061 A1 EP0752061 A1 EP 0752061A1
Authority
EP
European Patent Office
Prior art keywords
pressure
pressure pump
suction
valve
fuel
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
EP95911205A
Other languages
German (de)
English (en)
Other versions
EP0752061B1 (fr
Inventor
Wendelin KLÜGL
Detlev SCHÖPPE
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.)
Siemens AG
Original Assignee
Siemens AG
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6513623&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0752061(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP0752061A1 publication Critical patent/EP0752061A1/fr
Application granted granted Critical
Publication of EP0752061B1 publication Critical patent/EP0752061B1/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
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/34—Varying fuel delivery in quantity or timing by throttling of passages to pumping elements or of overflow passages, e.g. throttling by means of a pressure-controlled sliding valve having liquid stop or abutment
    • 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
    • F02M59/46—Valves
    • F02M59/462—Delivery valves
    • 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
    • F02M59/46—Valves
    • F02M59/464—Inlet valves of the check valve type

Definitions

  • the invention relates to an arrangement according to the preamble of claim 1.
  • the invention has for its object to simplify the control of the flow in an arrangement according to the preamble.
  • the uncontrolled high-pressure pump is dimensioned for the maximum necessary fuel flow (maximum value): it therefore draws in an "empty volume” if a smaller fuel flow is set on the low-pressure side, which is smaller than the aforementioned maximum value.
  • maximum value the maximum necessary fuel flow
  • a pressure- and / or volume-controlled low-pressure pump can be used to set the fuel flow depending on the engine parameters by the control unit.
  • a non-controllable low-pressure pump is preferably used and the fuel flow is set by a controllable valve between the low-pressure pump and the high-pressure pump; an exemplary embodiment of this type is explained in more detail with reference to the figures. Show it:
  • FIG. 1 shows schematically the detail relevant to the invention from a device for injecting fuel into the cylinders of an internal combustion engine
  • Figure 2 shows a first embodiment
  • Figure 3 shows a second embodiment of a high pressure pump.
  • a low-pressure pump 1 delivers fuel with a predetermined pressure (for example 2 bar) from one
  • a pressure relief valve 3 regulates the fuel delivery pressure to the specified value. Furthermore, a control valve 4 is provided, which is arranged between a line 5 and 6. The line 6 is connected to two differential pressure valves 7 and 8, which lead to the high-pressure pump.
  • the high-pressure pump essentially has a piston 11, 12 arranged in a housing 9, 10, each of which has a cam 13, 14 is drivable.
  • a space 15, 16 is indicated between the pistons 11, 12 and the housings 9, 10, each of which is connected on the one hand to one of the differential pressure valves 7, 8 and on the other hand to a check valve 17, 18.
  • the check valves 17, 18 are connected to a high-pressure line 19, which leads to a high-pressure accumulator, not shown.
  • a pressure sensor 42 is connected to the high-pressure line 19, which determines the pressure in the high-pressure line 19 and delivers the determined value to a control unit 21 which in turn delivers a control command to the control valve 4 on the basis of engine-specific data.
  • the low-pressure pump 1 delivers fuel from the tank 2 and brings the fuel to a predetermined pressure of, for example, 2 bar.
  • the following pressure specifications are only intended to be exemplary pressure specifications.
  • the control valve 4 regulates the fuel flow in line 6 so that it
  • the demand of the internal combustion engine corresponds.
  • the differential pressure valves 7, 8 are selected so that they open at a pressure difference of 0.5 bar.
  • the piston 12 is moved downward due to the movement of the cam 14 (arrow B) (the pistons 11, 12 are biased in this direction by a spring, not shown), so that the compression space 16 via the differential pressure valve 8 is filled with fuel.
  • the other cam 13 moves in the direction of its top dead center, so that fuel located in the compression chamber 15 is pressed via the check valve 17 into the high-pressure line 19 and the high-pressure accumulator.
  • the cams 13, 14 are positioned such that only one piston sucks in each phase position in order to ensure that the compression spaces 15, 16 are filled evenly.
  • a cavity can form when a piston 11 or 12 moves downward.
  • the differential pressure valves 7, 8 then cause the cavity to be created in each case via the piston in the compression spaces 15, 16 and not in the line 6.
  • FIG. 2 shows an embodiment with which a uniform filling of the compression spaces 15, 16 can be achieved.
  • the differential pressure valves 7, 8 shown in FIG. 1 are arranged in the housings 9, 10. 4
  • a housing 9 is shown in FIG. 2, which consists of a cylinder 22 and a pump head 23.
  • An inlet bore 24 arranged in the pump head 23 leads to a compression chamber 25, which is followed by a piston 26 which is displaceably arranged in the cylinder 22.
  • a differential pressure valve 32 which consists of a plate spring 27 and a valve disk 28, the valve disk 28 abutting an annular valve seat 29 of the pump head 23 and the valve seat 29 forming a sealing edge.
  • a check valve 31, which corresponds to the check valve 17 in FIG. 1, is arranged in an outlet bore 30 which on the one hand opens into the compression space 25 and on the other hand is connected to the high-pressure accumulator.
  • FIG. 1 A further exemplary embodiment of the invention is shown in FIG.
  • the upper part of the high-pressure pump corresponds to the arrangement shown in FIG. 2 and is therefore provided with the same reference numbers.
  • a camshaft 34 with a cam 35 is mounted in a camshaft housing 33 in the lower part of the high-pressure pump.
  • the cam 35 is connected to a tappet roller 36 which is rotatably mounted in a tappet 37.
  • the plunger 37 is always pushed in the direction of the camshaft 34 by a tappet spring 39 arranged in a space 38, so that the tappet roller 36 rolls on the cam 35.
  • the space 38 communicates with a camshaft space 40 via a relief bore 41 in which the camshaft 34 is mounted.
  • the piston 26 is not biased by a spring in the direction of the camshaft. This means that the piston 26 is guided freely floating in the cylinder. If, during a downward movement of the tappet 37, a defined volume of fuel is pressed into the compression chamber 25 via the control valve 4 (FIG. 1), the piston 26 makes a corresponding downward movement. During the upward movement of the tappet 37, which is driven by the cam 35 via the tappet roller 36, the tappet 37 only travels a certain idle stroke until it comes to rest on the underside of the piston. When the plunger 37 and the piston 26 move upward further, the fuel compressed to high pressure is pressed into the high-pressure accumulator via the check valve 31 and the outlet bore 30.
  • FIG. 3 has the advantage over the arrangement of FIG. 2 that no cavity can form even in the compression space, since the piston remains at a certain inflow of fuel.
  • the valve 32 need not be designed as a complex differential pressure valve. The spring force of the valve 32 then does not have to be too precise, so that a cheaper valve can be used.
  • a separation of piston 26 and plunger 37 has the advantage that the filling pressure only has to move the small mass of the piston. Accordingly, the filling pressure can be kept relatively low, the piston 26 dodges quickly enough, and there is therefore sufficient time available for the filling process.

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

L'invention vise à obtenir une commande simple et fonctionnant à la demande, du courant de carburant, et par conséquent de la pression régnant dans la partie haute pression d'un système d'injection (de type injection par accumulation de pression), à l'aide d'une pompe haute pression non pilotable comportant des clapets anti-retour situés côté aspiration et refoulement. A cet effet, le courant de carburant est établi coté basse pression par une pompe basse pression pilotable ou par une soupape de commande montée en aval. Si le courant de carburant établi est inférieur à la valeur maximale déterminée par le volume d'aspiration de la pompe haute pression, un piston "flottant", en association avec un clapet anti-retour (17, 18) classique monté côté aspiration, ou un piston commandé par ressort et un clapet anti-retour se présentant sous forme de soupape de pression différentielle (7, 8), permettent d'éviter un dosage erroné.
EP95911205A 1994-03-23 1995-03-03 Systeme permettant d'injecter du carburant dans les cylindres d'un moteur a combustion interne Expired - Lifetime EP0752061B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4410024 1994-03-23
DE4410024 1994-03-23
PCT/DE1995/000286 WO1995025887A1 (fr) 1994-03-23 1995-03-03 Systeme permettant d'injecter du carburant dans les cylindres d'un moteur a combustion interne

Publications (2)

Publication Number Publication Date
EP0752061A1 true EP0752061A1 (fr) 1997-01-08
EP0752061B1 EP0752061B1 (fr) 1999-01-27

Family

ID=6513623

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95911205A Expired - Lifetime EP0752061B1 (fr) 1994-03-23 1995-03-03 Systeme permettant d'injecter du carburant dans les cylindres d'un moteur a combustion interne

Country Status (3)

Country Link
EP (1) EP0752061B1 (fr)
DE (1) DE59504990D1 (fr)
WO (1) WO1995025887A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19541507A1 (de) * 1995-11-08 1997-05-15 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
DE59901316D1 (de) * 1998-08-25 2002-05-29 Siemens Ag Verfahren zum schnellen aufbau des kraftstoffdruckes in einem kraftstoffspeicher
DE19902259B4 (de) * 1999-01-21 2006-02-23 Siemens Ag Montageverfahren
DE19937673A1 (de) * 1999-08-10 2001-02-22 Siemens Ag Einspritzanlage für eine Brennkraftmaschine
DE19951999B4 (de) * 1999-10-28 2004-11-18 Siemens Ag Einspritzanlage für eine Brennkraftmaschine
DE10029420B4 (de) * 2000-06-15 2006-05-04 Siemens Ag Vorrichtung zum Zuführen von Fluid zu einer Pumpe
EP1321663A3 (fr) * 2001-12-19 2003-07-02 Robert Bosch Gmbh Dispositif d'injection de combustible pour moteur à combustion interne
DE10218022A1 (de) * 2002-04-23 2003-11-06 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für eine Brennkraftmaschine
US20080078362A1 (en) * 2006-09-29 2008-04-03 Caterpillar Inc. Variable discharge pump having single control valve
DK2495431T3 (da) * 2011-03-04 2014-02-03 Omt Ohg Torino S P A Hydraulisk pumpe, i særdeleshed en brændstofpumpe
DE102012107596B4 (de) * 2012-08-20 2016-05-04 Denso Corporation Hochdruckpumpe und Verfahren zum Betrieb einer Hochdruckpumpe

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0270720A1 (fr) * 1986-12-12 1988-06-15 Regie Nationale Des Usines Renault Pompe à débit variable
CH674243A5 (fr) * 1987-07-08 1990-05-15 Dereco Dieselmotoren Forschung
MX9403372A (es) * 1993-05-06 1995-01-31 Cummins Engine Co Inc Bomba de alta presion de desplazamiento variable para sistemas deinyeccion de combustible a deposito comun.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9525887A1 *

Also Published As

Publication number Publication date
EP0752061B1 (fr) 1999-01-27
WO1995025887A1 (fr) 1995-09-28
DE59504990D1 (de) 1999-03-11

Similar Documents

Publication Publication Date Title
DE3112381C2 (fr)
DE4401074B4 (de) Pumpenanordnung, insbesondere zur Förderung von Kraftstoff aus einem Vorratsbehälter zu einer Brennkraftmaschine
DE3235413C2 (fr)
CH674243A5 (fr)
EP0328602B1 (fr) Dispositif d'introduction de carburant dans la chambre de combustion d'un moteur a combustion interne
DE602004011229T2 (de) Common-rail-kraftstoffpumpe
EP0752061A1 (fr) Systeme permettant d'injecter du carburant dans les cylindres d'un moteur a combustion interne
EP1379784B1 (fr) Pompe d'injection a un piston pour systeme d'injection de carburant par accumulation de pression
EP0960275B1 (fr) Pompe haute pression destinee a l'alimentation en carburant des systemes a injection de carburant de moteurs a combustion interne
DE60301312T2 (de) Treibstoffpumpenanordnung
EP0281580B1 (fr) Dispositif d'injection de carburant pour un moteur diesel
EP0327819B1 (fr) Pompe à injection à carburant pour moteurs à combustion interne
DE10139055A1 (de) Verfahren, Computerprogramm, Steuer- und/oder Regelgerät sowie Kraftstoffsystem für eine Brennkraftmaschine
DE2913909C2 (fr)
EP0406592B1 (fr) Pompe à injection de combustible
DE19706099B4 (de) Hochdruckkraftstoffeinspritzsystem mit gemeinsamer Druckleitung
DE3236828A1 (de) Brennstoffeinspritzvorrichtung
DE2010242A1 (de) Auslaßventil fur eine Kraftstoffpumpe
DE3615919C2 (fr)
DE3624700A1 (de) Einspritzpumpe mit spritzverstellung
EP1269021B1 (fr) Pompe a pistons radiaux
DE10229395B4 (de) Verdrängermaschine, insbesondere Radialkolbenpumpe in einem Kraftstoffsystem einer Brennkraftmaschine, sowie hydraulisches System
DE2647788C2 (fr)
EP0372238B1 (fr) Pompe d'injection de combustible pour moteurs à combustion interne
EP1655480B1 (fr) Procédé pour utiliser un système de carburant d'un moteur à combustion interne et systéme de carburant

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: 19960904

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 19971114

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REF Corresponds to:

Ref document number: 59504990

Country of ref document: DE

Date of ref document: 19990311

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

Owner name: STUDIO JAUMANN P. & C. S.N.C.

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

Effective date: 19990330

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

26 Opposition filed

Opponent name: ROBERT BOSCH GMBH ABTLG. ZGM 3 MARQUARDT

Effective date: 19991027

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

PLBO Opposition rejected

Free format text: ORIGINAL CODE: EPIDOS REJO

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

APAE Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOS REFNO

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

APAC Appeal dossier modified

Free format text: ORIGINAL CODE: EPIDOS NOAPO

PLBN Opposition rejected

Free format text: ORIGINAL CODE: 0009273

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

Free format text: STATUS: OPPOSITION REJECTED

27O Opposition rejected

Effective date: 20030303

APAH Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNO

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

Free format text: REGISTERED BETWEEN 20110825 AND 20110831

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

Ref country code: DE

Payment date: 20140331

Year of fee payment: 20

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

Ref country code: FR

Payment date: 20140319

Year of fee payment: 20

Ref country code: IT

Payment date: 20140326

Year of fee payment: 20

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

Ref country code: GB

Payment date: 20140319

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 59504990

Country of ref document: DE

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20150302

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 EXPIRATION OF PROTECTION

Effective date: 20150302