US20020166591A1 - Electrically controlled three-way valve - Google Patents

Electrically controlled three-way valve Download PDF

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Publication number
US20020166591A1
US20020166591A1 US10/097,807 US9780702A US2002166591A1 US 20020166591 A1 US20020166591 A1 US 20020166591A1 US 9780702 A US9780702 A US 9780702A US 2002166591 A1 US2002166591 A1 US 2002166591A1
Authority
US
United States
Prior art keywords
duct
central cavity
inlet
way valve
shutter member
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.)
Abandoned
Application number
US10/097,807
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English (en)
Inventor
Marcello Cristiani
Mirco Vignoli
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of US20020166591A1 publication Critical patent/US20020166591A1/en
Abandoned legal-status Critical Current

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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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0603—Multiple-way valves
    • F16K31/0624—Lift valves
    • F16K31/0627—Lift valves with movable valve member positioned between seats
    • F16K31/0631—Lift valves with movable valve member positioned between seats with ball shaped valve members
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86574—Supply and exhaust
    • Y10T137/86622—Motor-operated

Definitions

  • the present invention relates to an electrically controlled three-way valve.
  • the present invention relates more particularly to an electrically controlled three-way valve to be used in the production of electro-hydraulic devices for the movement of the intake and exhaust valves of latest-generation internal combustion engines, to which use the following description makes explicit reference without entering into superfluous detail.
  • the three-way valves known at present have the major drawback that they are very bulky and, even more importantly, do not offer switching times that are low enough to satisfy the operating specifications required for assembly in the electro-hydraulic devices that supervise the movement of the intake and exhaust valves of internal combustion engines.
  • the three-way valves known at present comprise a valve body, in which a central cavity and three connection ducts, each of which brings the cavity into communication with atmosphere, are provided, and a shutter member which is mounted to move in the central cavity so as to be able alternately to close the inlet of two of the three connection ducts so as to bring the third connection duct into sole communication with one or other of the first two ducts.
  • connection ducts face the central cavity on opposite sides of the shutter member, while the shutter member is secured to the end of a support rod which is mounted in an axially moving manner through the body of the valve in a direction intersecting the inlets of the two connection ducts that face the interior of the central cavity on opposite sides of the shutter member, so as to be able to position the shutter member alternately to close the inlet of one or other of the two connection ducts mentioned above.
  • the object of the present invention is therefore to provide an electrically controlled three-way valve free from the above-described drawbacks.
  • the present invention therefore relates to an electrically controlled three-way valve comprising a valve body, within which a cavity and a respective first, second and third connection duct, adapted to bring the central cavity into communication with atmosphere, are provided, and a shutter member which is mounted to move within the central cavity between a first operating position, in which the shutter member is disposed to close the inlet of the first duct so as to obstruct this first duct in leak-tight manner and to bring the second duct into sole communication with the third duct, and a second operating position in which the shutter member is disposed to close the inlet of the third duct in order to obstruct this third duct in a leak-tight manner and to bring the second duct into sole communication with the first duct;
  • this three-way valve being characterised in that the shutter member is independent from any other member of the valve and is mounted to move freely within the central cavity, and in that the central cavity is shaped such that the shutter member is forced simultaneously to engage the inlets of the first and the third connection ducts
  • FIG. 1 is a sectional view, with some parts removed for clarity, of an electrically controlled three-way valve according to the present invention
  • FIG. 2 is a view on an enlarged scale of a detail of the three-way valve of FIG. 1.
  • FIGS. 1 and 2 an electrically controlled three-way valve particularly adapted for use in the electro-hydraulic devices that supervise the movement of the intake and exhaust valves of latest-generation internal combustion engines is shown overall by 1 .
  • the valve 1 comprises a valve body 2 , within which a central cavity 3 and three connection ducts 4 , 5 and 6 , each of which brings the central cavity 3 into communication with atmosphere, are provided, and a shutter member 7 which is mounted to move within the central cavity 3 between a first operating position (see FIG.
  • the inlets of the ducts 4 and 6 face the central cavity 3 in alignment on opposite sides of the shutter member 7
  • the shutter member 7 is formed by a spherical body or a body of substantially spherical shape preferably, but not necessarily, formed from a metal material, which is mounted to move freely within the central cavity 3 and is dimensioned such that it can alternately obstruct the inlet of the duct 4 or the inlet of the duct 6 in a leak-tight manner so as to prevent the flow of fluids to and from the central cavity 3 .
  • the spherical body 7 is independent from any other member of the valve 1 and is therefore able to move freely within the central cavity 3 in any direction compatible, obviously, with the free space available within the central cavity 3 .
  • the central cavity 3 is, moreover, shaped such that the shutter member 7 , i.e. the spherical body 7 , is forced simultaneously to engage the inlets of both the ducts 4 and 6 , but obstructs, however, only one of these ducts 4 and 6 in a leak-tight manner.
  • the shutter member 7 i.e. the spherical body 7
  • the inlet of the duct 4 and the inlet of the duct 6 are in particular both formed by a flared surface 4 a , 6 a of substantially frustoconical or funnel shape, on which the shutter member 7 , i.e. the spherical body 7 , is adapted to be disposed in abutment, partially engaging the space within this flared surface 4 a , 6 a .
  • the flared surfaces 4 a , 6 a face and are coaxial with one another, and the central cavity 3 is shaped such that the distance d between the outer peripheral edge of the inlet of the duct 4 and the outer peripheral edge of the inlet of the duct 6 is smaller than the diameter of the spherical body 7 , so that the spherical body 7 is forced to engage, with two diametrically opposite spherical portions, the space within the flared surface 4 a and the space within the flared surface 6 a .
  • the distance d between the inlet of the duct 4 and the inlet of the duct 6 is, moreover, slightly greater than the minimum distance needed to lock the spherical body 7 simultaneously in abutment on both the flared surfaces 4 a and 6 a , so as to leave the spherical body 7 free to move within the central cavity 3 .
  • the spherical body 7 may move freely within the central cavity 3 , but the space available for displacements is so small as to allow the spherical body 7 to perform only displacements of very small size.
  • the shape of the two flared surfaces 4 a and 6 a i.e. the aperture ⁇ of the cone that defines the two flared surfaces 4 a and 6 a , must be large enough to be able to receive the spherical body 7 at least partially in its interior.
  • the cone that defines the two flared surfaces 4 a and 6 a must be large enough for the contact between the spherical body 7 and the flared surface 4 a , 6 a to take place along a circumference positioned within the flared surface 4 a , 6 a .
  • This geometry of the two flared surfaces 4 a , 6 a in practice enables the spherical body 7 to be self-centred in the flared surface 4 a or 6 a , when it is closing the inlet of the duct 4 or 6 in a leak-tight manner.
  • the valve 1 is lastly provided with a retractile pressure member 8 which is able, on command, temporarily to project within the central cavity 3 via the inlet of the duct 6 and to be disposed in abutment on the shutter member 7 , i.e. on the spherical body 7 , so as to distance it from the flared surface 6 a and urge it into abutment against the flared surface 4 a so as to close the inlet of the duct 4 in a leak-tight manner.
  • a retractile pressure member 8 which is able, on command, temporarily to project within the central cavity 3 via the inlet of the duct 6 and to be disposed in abutment on the shutter member 7 , i.e. on the spherical body 7 , so as to distance it from the flared surface 6 a and urge it into abutment against the flared surface 4 a so as to close the inlet of the duct 4 in a leak-tight manner.
  • valve 1 is provided with a retractile rod or strut 8 , which extends coaxially with the axis of the two flared surfaces 4 a and 6 a , immediately downstream of the inlet of the duct 6 and is able to perform, on command, a temporary axial displacement towards the interior of the central cavity 3 so that its point temporarily projects within the flared surface 4 a in order to urge the shutter member 7 into the first operating position and maintain it in this position.
  • a retractile rod or strut 8 which extends coaxially with the axis of the two flared surfaces 4 a and 6 a , immediately downstream of the inlet of the duct 6 and is able to perform, on command, a temporary axial displacement towards the interior of the central cavity 3 so that its point temporarily projects within the flared surface 4 a in order to urge the shutter member 7 into the first operating position and maintain it in this position.
  • the retractile rod or strut 8 does not necessarily have to extend coaxially with the two flared surfaces 4 a , 6 a , but that it is enough for it, in its alternate axial movement, to be able to urge and maintain the shutter member 7 in abutment against the flared surface 4 a so as to close the inlet of the duct 4 in a leak-tight manner.
  • the axial stroke required from the retractile pressure member 8 is particularly small and is comparable with the axial stroke required from the shutter pin of any fuel injector, as a result of which it is particularly advantageous to use a constructional geometry for the valve 1 that is similar to that of the fuel injectors known at present.
  • the valve body 2 comprises an elongate tubular member 10 having a through duct 10 a of variable diameter, which extends coaxially with the longitudinal axis A of the elongate tubular member 10 over the entire length of this tubular member 10 and a closure cap 11 of substantially cylindrical shape secured in a non-detachable way to an axial end of the elongate tubular member 10 so as to close the through duct 10 a in a leak-tight manner.
  • the central cavity 3 and the ducts 4 , 5 and 6 are provided within the closure cap 11 such that the central cavity 3 and the ducts 4 and 6 are coaxial with the axis A of the elongate tubular member 10 , with the duct 4 facing outwards and the duct 6 facing, and in direct communication with, the through duct 10 a of the elongate tubular member 10 .
  • the duct 5 in contrast, extends through the body of the closure cap 11 and through the lateral wall of the elongate tubular member 10 in a direction preferably, but not necessarily, perpendicular to the axis A, in order to bring the central cavity 3 into communication with atmosphere.
  • the shutter member 7 i.e. the spherical body 7
  • the shutter member 7 is obviously mounted to move freely within the central cavity 3 and is dimensioned such that it can alternately obstruct, in a leak-tight manner, the inlet of the duct 4 , i.e. the flared surface 4 a , or the inlet of the duct 6 , i.e. the flared surface 6 a , so as to prevent the flow of fluids from and to the central cavity 3 .
  • the elongate tubular member 10 is formed, in the embodiment shown, by a series of tubular segments appropriately coupled together.
  • the retractile pressure member 8 is formed, however, by a bushing 12 of ferromagnetic material mounted to move axially within the section of the through duct 10 a of greater diameter and by a needle or pin 13 extending in a projecting manner from the bushing 6 to the closure cap 11 coaxially with the axis A.
  • the point of the pin 13 passes through the duct 6 and, projecting within the flared surface 6 a , is disposed in abutment on the shutter member 7 , i.e. on the spherical body 7 , detaching it from the flared surface 6 a and urging it into abutment against the flared surface 4 a in order to close the inlet of the duct 4 in a leak-tight manner.
  • the axial movement of the retractile pressure member 8 i.e. of the assembly formed by the bushing 12 and the needle or pin 13 is, however, produced by means of an elastic opposition member 14 which is adapted to maintain the retractile pressure member 8 in the above-mentioned advanced or extracted position, and by means of a coil 15 of electrically conducting material keyed on the elongate tubular member 10 so as to be coaxial with the longitudinal axis A of this elongate tubular member 10 .
  • the coil 15 When electric current passes through it, the coil 15 is adapted to generate a magnetic field able to overcome the elastic force of the elastic member 14 and axially to move the retractile pressure member 8 towards the coil 15 so as to displace the point of the needle or pin 13 out of the central cavity 3 or rather the flared surface 6 a.
  • the retractile pressure member 8 moves axially under the action of opposing elastic and electromagnetic forces generated by the elastic member 14 and the coil 15 respectively.
  • the elastic member 14 is formed by a helical spring 14 disposed in the through duct 10 a coaxial with the axis A, with a first end in abutment on the bushing 12 and a second end in abutment on a shoulder provided in the through duct 10 a.
  • this shoulder is formed by the axial end of a spring urging body 16 inserted within the through duct 10 a on the side opposite to the needle or pin 13 with respect to the bushing 6 .
  • the spring urging body 16 is an integral part of the elongate tubular member 10 , is of cylindrical tubular shape and is preferably, but not necessarily, formed from ferromagnetic material.
  • valve 1 in view of the extremely small mass of the shutter body 7 and the small size of the displacements needed to move from the first to the second operating position and vice versa, the switching times of the three-way valve 1 are some orders of magnitude lower than the three-way valves known at present, making it possible to use them in the electro-hydraulic devices that supervise the movement of the intake and exhaust valves of latest-generation internal combustion engines.
  • a further advantage of the electrically controlled three-way valve 1 described above is that its production costs are particularly low: its structure is in practice very similar to that of fuel injectors, with the result that the machinery used to produce these fuel injectors can be used for its production.
  • valve 1 The main constructional differences between the valve 1 and a fuel injector are in practice concentrated in the closure cap 11 which, in fuel injectors, is replaced by a spray nozzle, i.e. by a disc with a calibrated central hole disposed to close the through duct 10 a of the elongate tubular member 10 .

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Multiple-Way Valves (AREA)
  • Lift Valve (AREA)
  • Magnetically Actuated Valves (AREA)
  • Valve Housings (AREA)
US10/097,807 2001-03-16 2002-03-13 Electrically controlled three-way valve Abandoned US20020166591A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2001BO000145A ITBO20010145A1 (it) 2001-03-16 2001-03-16 Valvola a tre vie a comando elettrico
ITBO2001A000145 2001-03-16

Publications (1)

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US20020166591A1 true US20020166591A1 (en) 2002-11-14

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US10/097,807 Abandoned US20020166591A1 (en) 2001-03-16 2002-03-13 Electrically controlled three-way valve

Country Status (4)

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US (1) US20020166591A1 (pt)
EP (1) EP1241387A1 (pt)
BR (1) BR0200942A (pt)
IT (1) ITBO20010145A1 (pt)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8286897B2 (en) * 2008-04-23 2012-10-16 Magneti Marelli Electromagnetic fuel injector for gaseous fuels with anti-wear stop device
US20160298786A1 (en) * 2015-04-13 2016-10-13 Hamanakodenso Co., Ltd. Electromagnetic valve
US20180355993A1 (en) * 2017-06-09 2018-12-13 Flextronics Ap, Llc Hydraulic valve configuration for nh vbs with a nl solenoid
EP3575645A1 (en) * 2018-06-01 2019-12-04 Hamilton Sundstrand Corporation Device for pilot valve

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012001100A1 (de) * 2012-01-23 2013-07-25 Wabco Gmbh Anordnung zur Ansteuerung eines doppelt wirkenden Schaltzylinders einer Schaltanord-nung eines automatisierten Getriebes eines Kraftfahrzeuges

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3451429A (en) * 1966-09-28 1969-06-24 Bendix Corp Control valve providing means for minimizing seat wear
US3661183A (en) * 1969-07-05 1972-05-09 Bosch Gmbh Robert Electromagnetically operated valve with two seats
US4509716A (en) * 1983-09-30 1985-04-09 Cts Corporation Electromagnetically operated hydraulic valve device with snap-together valve housing
US4783049A (en) * 1986-03-24 1988-11-08 Lectron Products, Inc. Electrically operated automatic transmission controller assembly

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB868329A (en) * 1956-09-01 1961-05-17 Dowty Nucleonics Ltd Improvements in electrically-operated hydraulic valves
US4578662A (en) * 1984-10-11 1986-03-25 Lectron Products, Inc. Solenoid assembly
US5050642A (en) * 1990-08-23 1991-09-24 Siemens Automotive L.P. Pressure-compensated three-way solenoid valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3451429A (en) * 1966-09-28 1969-06-24 Bendix Corp Control valve providing means for minimizing seat wear
US3661183A (en) * 1969-07-05 1972-05-09 Bosch Gmbh Robert Electromagnetically operated valve with two seats
US4509716A (en) * 1983-09-30 1985-04-09 Cts Corporation Electromagnetically operated hydraulic valve device with snap-together valve housing
US4783049A (en) * 1986-03-24 1988-11-08 Lectron Products, Inc. Electrically operated automatic transmission controller assembly

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8286897B2 (en) * 2008-04-23 2012-10-16 Magneti Marelli Electromagnetic fuel injector for gaseous fuels with anti-wear stop device
US20160298786A1 (en) * 2015-04-13 2016-10-13 Hamanakodenso Co., Ltd. Electromagnetic valve
US10139009B2 (en) * 2015-04-13 2018-11-27 Hamanakodenso Co., Ltd. Electromagnetic valve
US20180355993A1 (en) * 2017-06-09 2018-12-13 Flextronics Ap, Llc Hydraulic valve configuration for nh vbs with a nl solenoid
EP3575645A1 (en) * 2018-06-01 2019-12-04 Hamilton Sundstrand Corporation Device for pilot valve

Also Published As

Publication number Publication date
BR0200942A (pt) 2002-11-05
EP1241387A1 (en) 2002-09-18
ITBO20010145A1 (it) 2002-09-16
ITBO20010145A0 (it) 2001-03-16

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