WO1993023274B1 - Proportional control valve with differential sensing area - Google Patents
Proportional control valve with differential sensing areaInfo
- Publication number
- WO1993023274B1 WO1993023274B1 PCT/US1993/004686 US9304686W WO9323274B1 WO 1993023274 B1 WO1993023274 B1 WO 1993023274B1 US 9304686 W US9304686 W US 9304686W WO 9323274 B1 WO9323274 B1 WO 9323274B1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- valve
- outlet valve
- working pressure
- poppet
- inlet
- Prior art date
Links
- 239000012530 fluid Substances 0.000 claims abstract 10
- 230000001276 controlling effect Effects 0.000 claims abstract 4
- 230000001105 regulatory Effects 0.000 claims abstract 3
- 230000003247 decreasing Effects 0.000 claims 1
Abstract
An electrically actuated valve for regulating a working pressure of a closed volume load includes an inlet valve (24) for controlling fluid flow between a supply port (16) and a working port (18) and an outlet valve (26) for controlling fluid flow between the working port (18) and an exhaust port (20). A solenoid actuator (70) applies an adjustable force to a movable valve element (44) for closing the outlet valve (26) and opening the inlet valve (24). The adjustable force is opposed by a reactionary force that is generated by the working pressure. The movable element (44) includes opposing areas exposed to the working pressure for scaling the reactionary force to the working pressure.
Claims
1. A proportional control valve for controlling a working pressure in a closed volume load comprising: a first conduit connecting a supply port to a working port for increasing the working pressure of the closed volume load; a second conduit connecting said working port to an exhaust port for decreasing the working pressure of the closed volume load; a directional control valve for regulating fluid flow through said first and second conduits; an outlet valve seat of said directional control valve having a predetermined area for passing fluid through said second conduit; an electromagnetic actuator for generating an adjustable force in response to a control signal for operating said directional control valve; a poppet assembly of said directional control valve being movable by the adjustable force in a first direction for opening said first conduit and closing said second conduit and being movable in a second direction by a reactionary force generated by the working pressure for opening said second conduit; said poppet assembly including a first area over which the working pressure is applied for moving said poppet assembly in said first direction and a second area over which the working pressure is applied for moving said poppet assembly in said second direction; said second area of said poppet assembly being larger that said first area by a difference that is less than said predetermined area of the outlet valve seat for scaling the reactionary force as a predetermined proportion of the working pressure; and said second area of the poppet assembly being equal to said predetermined area of the outlet valve seat.
2. The valve of claim 1 in which said second area of the poppet assembly is formed by an outlet valve poppet for isolating said working pressure from an exhaust pressure within said second conduit.
3. The valve of claim 2 in which said first area of the poppet assembly is formed by a fluid counterbalance having a first face exposed to the working pressure and a second face exposed to the exhaust pressure.
4. The valve of claim 3 in which a rod connects said fluid counterbalance to said outlet valve poppet.
5. The valve of claim 1 in which said directional control valve includes an inlet valve seat having a predetermined area for passing fluid through said first conduit and an inlet valve poppet for isolating the working pressure from a supply pressure within said first conduit.
6. The valve of claim 5 in which said poppet assembly is formed in part by first and second relatively movable elements of said directional control valve having a common axis of motion for separately controlling the fluid flow through said first and second conduits.
7. The valve of claim 6 in which said first movable element incorporates both said inlet valve poppet and said outlet valve seat and said second moveable element incorporates said outlet valve poppet.
8. The valve of claim 7 in which said inlet valve poppet and said outlet valve seat are located in different positions along said first moveable element with respect to said common axis of motion.
9. The valve of claim 8 in which said inlet and outlet valve poppets support respective seals for seating said inlet and outlet valve poppets against said inlet and outlet valve seats.
10. An electrically actuated valve for regulating a working pressure of a closed volume load as a function of an electrical signal comprising: an inlet valve interrupting a first flow path from a supply port to a working port for isolating a supply pressure from the working pressure and having a seat enclosing a predetermined area of said first flow path, an outlet valve interrupting a second flow path from said working port to an exhaust port for isolating the working pressure from an exhaust pressure and having a seat enclosing a predetermined area of said second flow path; a first movable element including an inlet valve poppet for opening and closing said inlet valve; a second movable element including an outlet valve poppet for opening and closing said outlet valve; an actuator responsive to the electrical signal for applying an adjustable force against said first and second movable elements in a first direction along a common axis of said first and second moveable elements for closing said outlet valve and opening said inlet valve; said second movable element including a first area over which the working pressure is applied for urging said second movable element in said first direction for closing said outlet valve and opening said inlet valve and a second area over which the working pressure is applied for urging said second movable element in a second direction for opening said outlet valve; said first and second areas of the second movable element being related in size for opposing movement of said actuator in said first direction with a reactionary force having a magnitude that is less than a product of said predetermined area of the outlet valve seat and the working pressure; and said inlet valve poppet and said outlet valve seat being located along said first moveable element in different positions with respect to said common axis of motion.
11. The valve of claim 10 in which said inlet and outlet valve poppets support respective seals for seating said inlet and outlet valve poppets against said inlet and outlet valve seats.
12. The va_. e of claim 11 in which said seals are axial 0-ring seals.
13. The valve of claim 11 in which said seal of the inlet valve poppet is mounted within a recess formed in said first moveable element.
14. The valve of claim 10 in which a passage is formed through said first moveable element for communicating the working pressure between said inlet and outlet valves.
15. The valve of claim 14 in which said first area of the second movable element is formed by a fluid counterbalance having a first face oriented for exposure to the working pressure and a second face oriented for exposure to the exhaust pressure.
16. The valve of claim 15 in which said second area of said second movable element is formed by said outlet valve poppet.
17. The valve of claim 16 in which a rod connects said fluid counterbalance to said outlet valve poppet.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US886,123 | 1992-05-20 | ||
| US07/886,123 US5306076A (en) | 1992-05-20 | 1992-05-20 | Proportional control valve with pressure compensation |
| US07/962,969 US5318354A (en) | 1992-05-20 | 1992-10-16 | Proportional control valve with differential sensing area |
| US962,969 | 1992-10-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1993023274A1 WO1993023274A1 (en) | 1993-11-25 |
| WO1993023274B1 true WO1993023274B1 (en) | 1994-01-20 |
Family
ID=27128785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/US1993/004686 WO1993023274A1 (en) | 1992-05-20 | 1993-05-18 | Proportional control valve with differential sensing area |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US5318354A (en) |
| WO (1) | WO1993023274A1 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5751629A (en) | 1995-04-25 | 1998-05-12 | Irori | Remotely programmable matrices with memories |
| US6416714B1 (en) | 1995-04-25 | 2002-07-09 | Discovery Partners International, Inc. | Remotely programmable matrices with memories |
| US6329139B1 (en) | 1995-04-25 | 2001-12-11 | Discovery Partners International | Automated sorting system for matrices with memory |
| US5874214A (en) | 1995-04-25 | 1999-02-23 | Irori | Remotely programmable matrices with memories |
| US6017496A (en) | 1995-06-07 | 2000-01-25 | Irori | Matrices with memories and uses thereof |
| US6331273B1 (en) | 1995-04-25 | 2001-12-18 | Discovery Partners International | Remotely programmable matrices with memories |
| DE19514858C2 (en) * | 1995-04-27 | 2003-04-30 | Knorr Bremse Systeme | Proportional solenoid valve for braking systems of rail vehicles |
| US5918635A (en) * | 1997-10-08 | 1999-07-06 | Vickers, Incorporated | Low pressure solenoid valve |
| DE10306756B4 (en) * | 2003-02-17 | 2007-01-04 | Carl Freudenberg Kg | Hydropneumatic suspension device for vehicles |
| CA2720768C (en) * | 2008-04-07 | 2016-01-12 | G.W. Lisk Company, Inc. | Motor operated butterfly valve |
| DE102008035332A1 (en) * | 2008-07-29 | 2010-02-04 | Robert Bosch Gmbh | Hubmagnetanordnung and valve assembly |
| US8939173B2 (en) | 2010-07-14 | 2015-01-27 | Mac Valves, Inc. | Stepper motor operated balanced flow control valve |
| US11801816B2 (en) * | 2021-12-15 | 2023-10-31 | Automotive Research & Testing Center | Air brake electric control valve |
| US20230182709A1 (en) * | 2021-12-15 | 2023-06-15 | Automotive Research & Testing Center | Air parking brake electric control valve |
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| US2194762A (en) * | 1937-10-08 | 1940-03-26 | Westinghouse Air Brake Co | Speed controlled brake |
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| US2919162A (en) * | 1955-08-17 | 1959-12-29 | Charles H Roberts | Anti-skid mechanism for aircraft landing wheels |
| DE1980549U (en) * | 1967-12-22 | 1968-03-07 | Westinghouse Bremsen Apparate | RELAY VALVE FOR BRAKE SYSTEM. |
| US3768519A (en) * | 1971-11-16 | 1973-10-30 | Bendix Corp | Modulator for adaptive braking system |
| GB1460146A (en) * | 1973-02-13 | 1976-12-31 | Girling Ltd | Control valve assemblies for air braking systems |
| US3924902A (en) * | 1973-08-31 | 1975-12-09 | Gen Signal Corp | Braking system for a light rail vehicle |
| US3857615A (en) * | 1973-11-12 | 1974-12-31 | Itt | Pressure regulating valve assembly |
| JPS5847338Y2 (en) * | 1974-07-27 | 1983-10-28 | 株式会社ナブコ | Solenoid fluid pressure control valve |
| US3941428A (en) * | 1975-05-08 | 1976-03-02 | General Motors Corporation | Air brake wheel lock control valve mechanism |
| US4145091A (en) * | 1977-09-30 | 1979-03-20 | Wagner Electric Corporation | Dual relay control valve having integral solenoid valve |
| DE2815735A1 (en) * | 1978-04-12 | 1979-10-25 | Daimler Benz Ag | Electromagnetic brake control valve - has solenoid-operated piston held between two springs to provide pressure proportional to solenoid displacement |
| DE3215475A1 (en) * | 1982-04-24 | 1983-11-03 | Robert Bosch Gmbh, 7000 Stuttgart | ELECTRO-PNEUMATIC BRAKE SYSTEM |
| DE3240272A1 (en) * | 1982-10-30 | 1984-05-03 | Robert Bosch Gmbh, 7000 Stuttgart | Pressure-medium braking system |
| JPS6033158A (en) * | 1983-07-29 | 1985-02-20 | Toyota Motor Corp | Antiskid braking device for vehicle |
| US4539542A (en) * | 1983-12-23 | 1985-09-03 | G. W. Lisk Company, Inc. | Solenoid construction and method for making the same |
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| DE3927110A1 (en) * | 1989-08-17 | 1991-02-21 | Bosch Gmbh Robert | SOLENOID VALVE WITH EXCITING CURRENT CONTROL DEVICE |
| DE4038575A1 (en) * | 1989-12-22 | 1991-06-27 | Bosch Gmbh Robert | PRESSURE CONTROL VALVE FOR AIR PRESSURE VEHICLE BRAKE SYSTEMS |
| DE3943002A1 (en) * | 1989-12-27 | 1991-07-04 | Lucas Ind Plc | VEHICLE BRAKE SYSTEM |
| US5123718A (en) * | 1990-04-06 | 1992-06-23 | G. W. Lisk Company, Inc. | Valve for automatic brake system |
| US5154203A (en) * | 1990-10-18 | 1992-10-13 | Allied-Signal Inc. | Proportional modulator for an electropneumatic braking system |
| DE9202154U1 (en) * | 1992-02-19 | 1992-04-09 | Lucas Industries P.L.C., Birmingham, West Midlands, Gb |
-
1992
- 1992-10-16 US US07/962,969 patent/US5318354A/en not_active Expired - Fee Related
-
1993
- 1993-05-18 WO PCT/US1993/004686 patent/WO1993023274A1/en active Application Filing
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