EP1552140A1 - Soupape de regulation de debit volumetrique - Google Patents

Soupape de regulation de debit volumetrique

Info

Publication number
EP1552140A1
EP1552140A1 EP03757826A EP03757826A EP1552140A1 EP 1552140 A1 EP1552140 A1 EP 1552140A1 EP 03757826 A EP03757826 A EP 03757826A EP 03757826 A EP03757826 A EP 03757826A EP 1552140 A1 EP1552140 A1 EP 1552140A1
Authority
EP
European Patent Office
Prior art keywords
control
piston
volume flow
valve
control 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
EP03757826A
Other languages
German (de)
English (en)
Other versions
EP1552140B1 (fr
Inventor
Martin Werner
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
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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, Siemens Corp filed Critical Siemens AG
Publication of EP1552140A1 publication Critical patent/EP1552140A1/fr
Application granted granted Critical
Publication of EP1552140B1 publication Critical patent/EP1552140B1/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
    • 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
    • F02M63/0014—Valves characterised by the valve actuating means
    • F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
    • F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D7/00—Other fuel-injection control
    • F02D7/002—Throttling of fuel passages between pumps and injectors or overflow 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
    • 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
    • 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
    • F02M63/0056—Throttling valves, e.g. having variable opening positions throttling the flow
    • 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
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/16—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors
    • F02M69/18—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel characterised by means for metering continuous fuel flow to injectors or means for varying fuel pressure upstream of continuously or intermittently operated injectors the means being metering valves throttling fuel passages to injectors or by-pass valves throttling overflow passages, the metering valves being actuated by a device responsive to the engine working parameters, e.g. engine load, speed, temperature or quantity of air

Definitions

  • the invention relates to a volume flow control valve.
  • volume flow control valves are used in particular to control the fuel volume flow in the feed to a high-pressure pump that delivers fuel into a high-pressure accumulator of a common rail injection system of an internal combustion engine.
  • the volume flow control valve must ensure that sufficient fuel is constantly available in accordance with the operating conditions of the internal combustion engine.
  • excessive fuel should not be pumped into the high-pressure accumulator, since the excess fuel is returned to the tank of the internal combustion engine via a high-pressure valve and thus leads to heating of the fuel in the tank.
  • compressing fuel that is not required reduces the efficiency of the injection system.
  • valve is already known, in particular for metering fuel in an injection system of an internal combustion engine.
  • the valve consists of a valve housing with an inlet and an outlet opening.
  • a control piston with a control groove is movably mounted in the valve housing.
  • the control piston is moved via an adjusting mechanism against the force of a return spring.
  • the outlet opening is closed by the piston or is querschnit a more or less large für SharePoints- 't be released in the outlet opening.
  • the outlet opening is at least partially released, the fuel flows from the inlet opening via the control groove to the outlet.
  • the control groove is formed by a rotationally symmetrical turning in the control piston. Due to the shape of the control piston, the valve characteristic curve is linear.
  • volume flow The relationship between the Control signal or piston stroke referred to the volume flow.
  • a characteristic curve is often desired which enables a flat characteristic curve for low values of the control signal and a steeper characteristic curve curve for higher values of the control signal. This cannot be achieved with the usual volume flow control valve.
  • the object of the invention is therefore to provide a volume flow control valve which is simple and inexpensive to manufacture and which enables different slopes of the valve characteristic.
  • control piston is designed as a stepped piston which is flowed around on the outside and has a control geometry in its outer surface which is designed such that different slopes in the valve characteristic curve result depending on the position of the control piston.
  • the advantage of the invention lies in the fact that even the most complex control geometries can easily be introduced into the lateral surface of the stepped piston, for example by milling. Deburring the control geometry is possible without any problems, since the edge is on the outer surface of the control piston and is therefore easily accessible.
  • the simple manufacture of even complicated control geometries means that a wide variety of valve characteristics can be realized cost-effectively.
  • the inlet and outlet can be made through simple and inexpensive holes in the valve housing.
  • piston stroke can be proportional to the control signal.
  • a proportional relationship between piston stroke and control signal can be achieved with simple and inexpensive actuators, for example an electromagnetic actuator.
  • a preferred embodiment of the invention provides for the outflow geometry to be introduced multiple times radially over the circumference into the control piston. This increases the flow rate and also reduces the radial forces on the valve piston.
  • Figure la shows a longitudinal section through the volume flow control valve
  • Figure lb shows a further longitudinal section through the volume flow control valve, the sectional plane being radially offset by 90 ° to Fig.l.
  • Figure 2 shows a typical valve characteristic of the volume flow control valve
  • FIG. la shows a longitudinal section through the volume flow control valve 1.
  • the volume flow control valve consists essentially of the valve housing 10, the control piston 2 and the return spring 4.
  • the valve housing 10 has an inlet 12 and an outlet 13 which are introduced radially into the valve housing 10.
  • the valve housing is in the axial direction 10 is provided with a sliding bore 18 in which the control piston 2 is guided so as to be axially movable.
  • an inlet groove 16 is screwed into the inner circumference of the valve housing.
  • the control piston 2 is designed as a stepped piston.
  • a control groove 15 is screwed into the control piston 2 between a first end area 28 and a second end area 29 of the control piston 2.
  • the outflow geometry 8 has a first control edge 19, a second control edge 20 and a third control edge 34, by means of which a first flow cross section 21 and a second flow cross section 22 are delimited.
  • the two flow cross-sections 21, 22 are identified by the dashed lines.
  • the control piston 2 has a spring receiving bore 24 in its first end region 28, which is designed as a blind hole.
  • the return spring 4 is supported on one side on the end face of the spring receiving bore 24 and on the opposite side in a spring plate 25, which is inserted into the valve housing 10, preferably by pressing.
  • the control piston 2 is displaced by an actuator 11 and a transmission element 27 against the force of the return spring 4.
  • An electromagnetic, mechanical, hydraulic or pneumatic adjusting element is suitable as an actuator.
  • the adjusting member preferably enables a proportional relationship between the control signal and the piston stroke.
  • the volume flow control valve is described below.
  • Fig.la which corresponds to a first end position of the control piston 2
  • the inlet 12 is initially completely closed by the control piston 2, so that no liquid can flow through the volume flow control valve.
  • the actuator 11 receives an actuating signal, it moves the control piston 2 with the aid of the transmission element 27 against the spring force of the return spring 4.
  • the control piston moves out of its first end position 5 towards a second end position 6, which in FIG the first end position.
  • the control piston 2 Starting from its first end position, the control piston 2 initially travels a stroke length sl (FIG. 1b), in which the control piston 2 continues to completely close the inlet 12.
  • the outflow geometry 8 is designed such that a first and a second flow cross section 21, 22 are created.
  • the two flow cross sections 21, 22 merge into one another, the transition being identified by the second control edge 20. Due to the smaller width of the first flow cross-section 21, the increase in cross-section in the area of the first flow cross-section 21 relative to the piston stroke is smaller than in the area of the second flow cross-section 22.
  • This behavior is illustrated by the valve characteristic curve shown in FIG. 2.
  • the volume flow Q is plotted against the control current I. When the control current I is very low, ie with a small piston stroke, the inlet groove 16 remains completely closed, so that no liquid flows through the volume flow. control valve flows. With increasing exciter current the
  • Control piston 2 pressed further to the left against the force of the return spring 4.
  • the first flow cross section 21 is released and liquid can flow through the volume flow control valve. Since the increase in cross-sectional area in this area is only very small, the characteristic curve has only a flat slope. If the control piston 2 reaches the inlet area 12, 16 with its second control edge 20, the second flow cross-section 22 is additionally released. Due to the larger width of the second flow cross-section 22 in relation to the first flow cross-section 21, there is a greater increase in cross-sectional area. As a result, more liquid can flow through the volume flow control valve, as can be seen in the steeper course of the valve characteristic.
  • the outflow geometry 8 thus enables very fine regulation of the volume flow at low control currents and rapid opening of the valve at higher control currents in order to provide the large amount of liquid required.
  • the invention is not limited to the outflow geometry 8 shown in the exemplary embodiment. Rather, the particular advantage of the invention lies in the fact that by simply introducing the outflow geometry 8 into the lateral surface 7 of the control piston 2, almost any outflow geometry can be realized.
  • An outflow geometry with four instead of the three control edges shown enables, for example, a valve characteristic curve with three different slopes. It is conceivable that the characteristic curve has a flat course at the beginning and the end and a steep course in the middle area.
  • By designing the discharge geometry in such a way that the Flow cross-section is continuously increased or decreased, a curve-shaped course of the valve characteristic can also be realized.
  • the invention thus enables the valve characteristic of the volume flow control valve to be easily and inexpensively adapted to the respective requirements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Magnetically Actuated Valves (AREA)
  • Lift Valve (AREA)

Abstract

La présente invention concerne une soupape de régulation de débit volumétrique (1) comprenant un piston de commande, qui repose dans un boîtier de soupape (10) et qui peut passer d'une première position terminale (5) à une seconde position terminale (6) en se déplaçant à l'encontre de la force d'un ressort de rappel. Le piston de commande (2) est conçu sous forme de piston différentiel qui est contourné par l'extérieur et présente une géométrie de commande (8) intégrée dans la surface d'enveloppe (7). Cette géométrie de commande est conçue de façon à obtenir différentes pentes de la courbe caractéristique de soupape en fonction de la position du piston de commande (2).
EP03757826A 2002-10-14 2003-09-11 Soupape de regulation de debit volumetrique Expired - Lifetime EP1552140B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10247774 2002-10-14
DE2002147774 DE10247774B4 (de) 2002-10-14 2002-10-14 Volumenstromregelventil
PCT/EP2003/010135 WO2004036032A1 (fr) 2002-10-14 2003-09-11 Soupape de regulation de debit volumetrique

Publications (2)

Publication Number Publication Date
EP1552140A1 true EP1552140A1 (fr) 2005-07-13
EP1552140B1 EP1552140B1 (fr) 2007-05-16

Family

ID=32038624

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03757826A Expired - Lifetime EP1552140B1 (fr) 2002-10-14 2003-09-11 Soupape de regulation de debit volumetrique

Country Status (3)

Country Link
EP (1) EP1552140B1 (fr)
DE (2) DE10247774B4 (fr)
WO (1) WO2004036032A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1398734B1 (it) * 2010-03-04 2013-03-18 Bosch Gmbh Robert Impianto per l'alimentazione di carburante ad un motore a combustione interna

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3642642C3 (de) * 1986-12-13 1994-09-01 Rexroth Mannesmann Gmbh Schaltungsanordnung zur Lage- und Vorschubregelung eines hydraulischen Antriebes
DE3838914A1 (de) * 1988-11-17 1990-05-23 Bosch Gmbh Robert Ventil
US5092299A (en) * 1990-11-30 1992-03-03 Cummins Engine Company, Inc. Air fuel control for a PT fuel system
DE4308297A1 (fr) * 1992-03-20 1993-09-23 Rexroth Mannesmann Gmbh
DE4443352A1 (de) * 1994-12-06 1996-06-13 Kermi Gmbh Vorrichtung zur Steuerung eines Durchflusses, insbesondere Ventil
DE4444417B4 (de) * 1994-12-14 2005-01-05 Robert Bosch Gmbh Kraftstoffversorgungsanlage
EP0762256B1 (fr) * 1995-08-14 2001-10-31 LuK Fahrzeug-Hydraulik GmbH & Co. KG Soupape de régulation de débit
DE19933198A1 (de) * 1999-07-15 2001-01-18 Fev Motorentech Gmbh Verfahren zur Druckregelung an einer Einspritzvorrichtung für flüssige Kraftstoffe
DE10023621A1 (de) * 2000-05-13 2001-11-15 Bosch Gmbh Robert Kraftstoffeinspritzsystem für Brennkraftmaschinen
JP2002004977A (ja) * 2000-06-26 2002-01-09 Denso Corp 流量制御装置
US7178510B2 (en) * 2000-10-16 2007-02-20 Woodward Governor Company Fuel system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004036032A1 *

Also Published As

Publication number Publication date
DE50307301D1 (de) 2007-06-28
EP1552140B1 (fr) 2007-05-16
DE10247774B4 (de) 2005-09-29
DE10247774A1 (de) 2004-04-22
WO2004036032A1 (fr) 2004-04-29

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