A fast acting, electromagnetically actuated three-way miniature valve which is specifically useful for applications in automobile technology; for example, the electronically controlled pressure regulation in automatic transmissions. An example of the invention is characterized by the combination of:
A fast acting, electromagnetically actuated three-way miniature valve which is specifically useful for applications in automobile technology; for example, the electronically controlled pressure regulation in automatic transmissions. An example of the invention is characterized by the combination of: armature and obturator are a single solid unit, preferably manufactured out of one piece, and with a total mass of only a few grams; the valve stroke is significantly less than 0.5 mm, preferably 0.05-0.2 mm; the bearing arrangement for the valve obturator is such that a radial clearance of less than 0.05 mm is involved and the valve obturator is movable in the direction of the axis, and this bearing arrangement simultaneously guides the armature and also serves to separate two spaces of differing pressure; the valve obturator coordinates with two alternately closing valve seats; the seating surfaces of the armature, in both directions of movement, are exclusively defined by the valve obturator; the seating surfaces of the armature are perfused by the main oil stream prior to the armature reaching its final position; the valve seats feature approximately the same radius as the armature bearing, where the average radius of the valve seats does not deviate by more than ±-1 mm from that of the armature bearing, and where this deviation of the radii of the valve seats preferably shall not exceed 0.4 mm.
대표청구항▼
A pulse width modulated three-way solenoid valve comprising valve body structure, (a) said valve body structure comprising a pressure port, a control port and a dump port serving to place the valve in a three-way fluid control circuit, (b) first and second annular valve seats spaced apart axially on
A pulse width modulated three-way solenoid valve comprising valve body structure, (a) said valve body structure comprising a pressure port, a control port and a dump port serving to place the valve in a three-way fluid control circuit, (b) first and second annular valve seats spaced apart axially on said valve body structure, (c) a solenoid coil mounted on said valve body structure and adapted to be electrically modulated, (d) a tubular armature that is acted directly upon by an electromagnetic field issued by said solenoid coil in response to the electrical modulation thereof and that is axially displaced on said valve body structure in response to electrical modulation of said solenoid coil such that the respective fluid pressures at said pressure port and at said dump port are modulated to said control port in accordance with the electrical modulation of said solenoid coil, (e) said tubular armature comprising a radially outer surface portion and a radially inner surface portion, (f) said valve body structure comprising guide means confronting one of said surface portions of said armature for guiding the axial displacement of said armature, (g) said armature also having a circumferentially extending collar means comprising a radial protrusion, (h) said collar means comprising a first annular surface portion disposed to seat on and unseat from said first annular valve seat as said armature is axially displaced on said valve body structure by said solenoid coil, (i) said collar means also comprising a second annular surface portion disposed to seat on and unseat from said second annular valve seat as said armature is axially displaced on said valve body structure by said solenoid coil, (j) said pressure port, said control port, and said dump port being arranged in relation to said first and second annular valve seats, and said first and second annular surface portions of said collar means being arranged in relation to said first and second annular valve seats such that (i) when said first annular surface portion of said collar means is seated on said first annular valve seat, said second annular surface portion of said collar means is unseated from said second valve seat, and said control port is fluid communication with one of said pressure and dump ports but not with the other, and (ii) when said second annular surface portion of said collar means is seated on said second valve seat, said first annular surface portion of said collar means is unseated from said first valve seat, and said control port is in fluid communication with said other of said pressure and dump ports, but not with said one of said pressure and dump ports, (k) wherein the axial displacement of said armature is limited only by the respective seatings of said first and second annular surface portions of said collar means on said first and second valve seats respectively, (l) wherein said guide means of said valve body structure and said one surface portion of said armature are constructed to conjointly form a piston-type seal that seals directly between said pressure port and said dump port both when said first annular surface portion of said collar means is seated on said first valve seat and when said second annular surface portion of said collar means is seated on said second valve seat, (m) a stator comprising an annular surface portion closely coaxially confronting, but always axially spaced apart from, an annular surface portion of said armature to provide the direct electromagnetic coupling of said solenoid coil to said armature, and (n) means providing for perfusion of the space between said stator\s and said armature\s annular surface portions by hydraulic fluid and for the unhindered ingress and egress thereof to and from said space as said armature is operated by the modulation of said solenoid coil.
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이 특허에 인용된 특허 (18)
Van Ornum Charles A. (Fountain Valley CA), Compound pneumatic valve.
Meints Edward G. (Peoria IL) Stockner Alan R. (Metamora IL), Actuator and valve assembly for a hydraulically-actuated electronically-controlled injector.
Tucker, Jeffrey C.; Andersen, Brian L.; Mittelstadt, Robert, Fluid flow control system, fluid delivery and control system for a fluid delivery line, and method for controlling pressure oscillations within fluid of a fluid delivery line.
Scott R. Schuricht ; Manas R. Satapathy ; Thomas G. Ausman ; Eric M. Bram, Fuel injector with independent control of check valve and fuel pressurization.
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