EP1492951A1 - Systeme d'injection pour moteurs a combustion interne, comprenant une soupape de commande, et soupape de commande d'amenee de carburant dans un systeme d'injection - Google Patents

Systeme d'injection pour moteurs a combustion interne, comprenant une soupape de commande, et soupape de commande d'amenee de carburant dans un systeme d'injection

Info

Publication number
EP1492951A1
EP1492951A1 EP03724856A EP03724856A EP1492951A1 EP 1492951 A1 EP1492951 A1 EP 1492951A1 EP 03724856 A EP03724856 A EP 03724856A EP 03724856 A EP03724856 A EP 03724856A EP 1492951 A1 EP1492951 A1 EP 1492951A1
Authority
EP
European Patent Office
Prior art keywords
control valve
injection device
piston
throttle
flow rate
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.)
Withdrawn
Application number
EP03724856A
Other languages
German (de)
English (en)
Inventor
Andrej Astachow
Johann Warga
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
Application filed by Siemens AG filed Critical Siemens AG
Publication of EP1492951A1 publication Critical patent/EP1492951A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
    • 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
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/02—Injectors structurally combined with fuel-injection pumps
    • F02M57/022—Injectors structurally combined with fuel-injection pumps characterised by the pump drive
    • F02M57/025—Injectors structurally combined with fuel-injection pumps characterised by the pump drive hydraulic, e.g. with pressure amplification
    • 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
    • F02M59/105—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 hydraulic drive
    • 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
    • F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
    • 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
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/004—Sliding valves, e.g. spool valves, i.e. whereby the closing member has a sliding movement along a seat for opening and closing
    • 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
    • F02M63/0012—Valves
    • F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
    • F02M63/0047—Four-way valves or valves with more than four ways
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0263—Construction of housing; Use of materials therefor of lift valves multiple way valves
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/029—Electromagnetically actuated valves
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/04—Construction of housing; Use of materials therefor of sliding valves
    • F16K27/041—Construction of housing; Use of materials therefor of sliding valves cylindrical slide 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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts

Definitions

  • Injection device for internal combustion engines with a control valve and valve for controlling the fuel supply in an injection device
  • the present invention relates to an injection device for internal combustion engines and a valve for controlling the fuel supply in an injection device.
  • a control valve is known from US Pat. No. 5,460,329, a working medium controlling a pressure intensifier by the movement of the control valve piston.
  • the movement of the pressure booster piston in turn controls the movement of a valve needle of an injection valve for a fuel injection process accordingly.
  • the control valve piston has control edges, via which the flow of the working medium is controlled by the control valve.
  • an electrohydraulic control device which has two adjusting devices with which the overlap of the control edges of the control piston for two volume flows and thus the characteristic curves thereof can be adjusted. This can compensate for the disruptive influence of tolerances on the control edges.
  • a changeover valve of a hydraulic drive for a switching device in particular is known, wherein three different lines can be connected or disconnected from one another in a controlled manner via a control piston.
  • a second end of the control piston is located in a pressure chamber, which is connected to the tank line via a line.
  • the pressure chamber is pressure applied, which leads to the control movement of the control piston.
  • the high pressure in the pressure chamber is reduced again after the electromagnetic system is switched off via a throttle provided in the line.
  • the object of the present invention is to provide a control valve which, with a simple structure, enables precise control of a reduced flow rate.
  • a control or throttle edge which is formed on the movable control valve piston itself can be omitted, which simplifies the design and manufacture of the control valve.
  • a throttle is arranged outside the control valve piston and in front of the second chamber in order to set the reduced second flow rate.
  • the throttle is advantageously arranged in one of the fluid lines of the control valve housing between the control valve piston and the second chamber.
  • the medium is also pumped into the volume between the throttle and the control piston.
  • This volume is selected, the greater the time losses in the system in order to fill this volume.
  • the throttle is arranged as close as possible to the control valve piston.
  • the throttle is designed as a separate part and is mounted in the fluid line.
  • Fig. 1 is a schematic side view of the control valve according to the invention in three operating positions according to the first embodiment and the circuit diagram, and
  • Fig. 2a a detail of the control valve on an enlarged scale according to the first and the second embodiment.
  • a 3-way control valve for controlling a piston of a pressure booster of an injection device for internal combustion engines has a control valve piston 3 arranged in a control valve housing 1. Its axial position in the valve housing 1 is controlled by a control unit, which is not shown and is known per se. Various radial fluid lines 5 are formed through holes in the control valve housing 1. A rail 7, a pressure booster 9 and a discharge chamber 11 can be connected to one another in a controlled manner via these. 1, the 3-way control valve has three operating positions or positioning options for the control valve piston 3 (I, II, III). In position I, the valve connects the fluid supply from the rail 7 to the pressure booster 9 via two flow paths at a first flow rate Dl.
  • valve or the control valve piston 3 separates the one Supply of the fluid to the pressure intensifier 9 by closing the corresponding openings.
  • the control valve connects the space of the pressure intensifier 9 with the drain chamber 11 in the opposite direction of flow via two flow paths.
  • the control piston 3 has numerous corresponding annular grooves 13, which form the control edges of the control valve piston 3.
  • the valve closes the flow cross sections opened in positions I and II and establishes the fluid supply from the rail 7 to the central channel 5 or to the pressure intensifier 9.
  • This fluid channel typically has a diameter of approximately 2 mm and a length of approximately 10 mm.
  • a throttle 15 is arranged in the middle fluid channel 5 to the pressure intensifier 9 in the immediate vicinity of the control valve piston 3, which, in contrast to the other two operating positions (I, II), defines the fluid flow to a second flow rate D2 that is reduced compared to the first flow rate D1 reduced.
  • This flow rate D2 is therefore not set by corresponding control edges of the control piston 3.
  • the symmetrical structure of the control valve and the symmetrical arrangement of the throttle 15 in the valve housing 1 prevent axial forces from acting on the control valve piston 3, which would have to be compensated additionally.
  • the circuit diagram of the valve is additionally shown to illustrate the principle.
  • Pressure intensifier needed.
  • the pressure generated by the pressure intensifier piston in the high pressure chamber of the pressure intensifier 9 is just sufficient to open an injector needle in a pressure-controlled injection nozzle in an injection device with an electromagnetically controlled hydraulic circuit for a short time and not with the full needle stroke (not shown). This means that a minimum amount of fuel is injected in position III.
  • the pressure at the injection nozzle rises more slowly and, together with the given switching times, comparatively less fuel is injected.
  • the difference in filling times caused by the throttle is simplified by a factor of about 4.
  • the supply of the working medium to the pressure intensifier is therefore deliberately throttled at position III of the control valve in order to achieve the desired movement of the pressure intensifier piston and thus a stable, brief opening of the injection nozzle for the smallest possible injection quantities.
  • the throttle 15 according to the first embodiment and an alternative throttle 17 according to the second embodiment are compared on an enlarged scale.
  • the throttle 15 is formed by a ring which is stamped into the fluid channel 5 after the throttle bore has been produced.
  • the throttle consists of the same material as the control valve housing 1.
  • the throttle 17 is formed directly in the inner wall of the fluid channel 5. The throttle can be drilled or eroded and, if necessary, can then be rounded to the setpoint value of the reduced hydraulic flow D2.

Landscapes

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

Abstract

L'invention concerne une soupape de commande connue, en particulier destinée à commander un piston d'un multiplicateur de pression (9) d'un système d'injection pour moteurs à combustion interne, laquelle soupape comprend une cage de soupape de commande (1), pourvue de conduites de fluide (5), et un piston à soupape de commande (3), pouvant se déplacer de façon guidée à l'intérieur de la cage dans au moins deux positions de fonctionnement (I, II, III), lequel piston commande au moins la liaison fluidique entre une première chambre (7) et une deuxième chambre (9) avec un premier débit (D1) ou un deuxième débit réduit (D2). L'objectif de cette invention est de produire une soupape de commande, qui permet avec une structure simple la commande précise du deuxième débit réduit. A cet effet, un limiteur (15 ; 17), servant au réglage du deuxième débit réduit (D2), est installé en dehors du piston à soupape de commande (3) et en amont de la deuxième chambre (9).
EP03724856A 2002-04-11 2003-04-01 Systeme d'injection pour moteurs a combustion interne, comprenant une soupape de commande, et soupape de commande d'amenee de carburant dans un systeme d'injection Withdrawn EP1492951A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10215981 2002-04-11
DE10215981 2002-04-11
PCT/DE2003/001071 WO2003087566A1 (fr) 2002-04-11 2003-04-01 Systeme d'injection pour moteurs a combustion interne, comprenant une soupape de commande, et soupape de commande d'amenee de carburant dans un systeme d'injection

Publications (1)

Publication Number Publication Date
EP1492951A1 true EP1492951A1 (fr) 2005-01-05

Family

ID=29224473

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03724856A Withdrawn EP1492951A1 (fr) 2002-04-11 2003-04-01 Systeme d'injection pour moteurs a combustion interne, comprenant une soupape de commande, et soupape de commande d'amenee de carburant dans un systeme d'injection

Country Status (4)

Country Link
US (1) US20050087621A1 (fr)
EP (1) EP1492951A1 (fr)
JP (1) JP2005527732A (fr)
WO (1) WO2003087566A1 (fr)

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4087967A (en) * 1977-03-14 1978-05-09 Eaton Corporation Sleeve spool valve
JPS6036770A (ja) * 1983-08-09 1985-02-25 Kawasaki Heavy Ind Ltd 内燃機関の燃料噴射制御装置
US4579038A (en) * 1984-05-04 1986-04-01 Deere & Company Depth control valve and system for agricultural implements
US5460329A (en) 1994-06-06 1995-10-24 Sturman; Oded E. High speed fuel injector
DE19649833A1 (de) 1996-12-02 1998-06-04 Bosch Gmbh Robert Elektrohydraulische Steuervorrichtung
JPH10238432A (ja) * 1997-02-26 1998-09-08 Isuzu Motors Ltd エンジンの燃料噴射装置
DE19848904A1 (de) * 1998-10-23 2000-04-27 Hydraulik Ring Gmbh Druckstufe zur Regulierung einer Voreinspritzmenge von Kraftstoff in Verbrennungsmotoren, vorzugsweise in Dieselmotoren
DE19900771B4 (de) 1999-01-12 2007-06-06 Abb Patent Gmbh Umschaltventil eines hydraulischen Antriebes für eine Betätigungseinrichtung, insbesondere ein Schaltgerät
CA2370850A1 (fr) * 1999-05-18 2000-11-23 Ning Lei Dispositif de commande hydraulique a deux etages et a double effet

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03087566A1 *

Also Published As

Publication number Publication date
WO2003087566A1 (fr) 2003-10-23
US20050087621A1 (en) 2005-04-28
JP2005527732A (ja) 2005-09-15

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