Title:
Extended range proportional flow valve method
Document Type and Number:
WIPO Patent Application WO2002005046
Kind Code:
A3
Abstract:
A method for operating a proportional flow valve with a pilot valve member over an extended range and at a low flow rate. The pilot valve member may be operated, by varying the frequency or duty cycle or both of the pulse width modulated current applied to the solenoid, without thereby causing the main valve member to open.
Inventors:
JENSEN DAVIS K (US)
Application Number:
PCT/US2001/022000
Publication Date:
April 25, 2002
Filing Date:
July 12, 2001
Export Citation:
Assignee:
HONEYWELL INT INC (US)
International Classes:
F02C7/232; F02C9/26; G05D16/20; (IPC1-7): G05D7/06; G05D16/20; F02C7/232
Foreign References:
| US5538026A | 1996-07-23 | |||
| US5716038A | 1998-02-10 | |||
| US5294089A | 1994-03-15 | |||
| US5020772A | 1991-06-04 |
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