Combination solenoid operated flow control and shut-off valve with pressure transducer
AssigneeEaton Corporation
InventorsCharles R. Martus, Janet L. Hawkins, Gerrit V. Beneker
Life of this patent
Estimating the term…
Abstract
A combination solenoid operated flow control valve and solenoid operated by-pass valve and pressure transducer are disposed in a common housing with a common electrical receptacle for connection thereto. The pressure transducer senses differential pressure across a metering orifice. The pressure transducer measures flow through the metering orifice during leak testing. A vacuum is drawn in the system for leak testing. The by-pass valve is opened to bypass the metering orifice and permit full flow to the flow control valve during normal engine operation.
Claims20
A method of making an electrically operated valve assembly with an integral pressure transducer comprising:
- (a) forming a valve housing with a valving chamber having an inlet port with a passage communicating said chamber with a second valving chamber having an outlet port;
- (b) disposing a pressure transducer in the housing and forming a first valve seat in said passage and porting the pressure transducer to said passage;
- (c) disposing a first solenoid operated valve with a moveable obturator in said first chamber and disposing the obturator for movement with respect to said first valve seat;
- and,
- (d) forming a second valve seat in said passage downstream of said first passage and disposing a second solenoid operated valve in said second passage with an obturator for movement with respect to said second valve seat.
An electrically operated valve assembly with integral pressure transducer comprising:
- (a) a valve housing defining a first valving chamber with an inlet port and a second valving chamber with an outlet port and a valving passage having a first valve seat controlling flow from said first chamber to said passage and a second valve seat controlling flow from said passage to said second chamber;
- (b) a first solenoid operated valve disposed for movement with respect to said first valve seat for controlling flow thereover and a second solenoid operated valve disposed for movement with respect to said second valve seat;
- and
- (c) a pressure transducer disposed in said housing and ported to said passage for sensing pressure therein;
- (d) means for effecting common external electrical connection to said first solenoid and said transducer.
Dependencies are inferred from the claim text.