| US 7,600,417 B2 | ||
| Ultrasonic-densiometer mass flow sensor for use in flow metering units | ||
| Bruce Paradise, Avon, Conn. (US) | ||
| Assigned to Hamilton Sundstrand Corporation, Windsor Locks, Conn. (US) | ||
| Filed on Dec. 15, 2005, as Appl. No. 11/304,273. | ||
| Prior Publication US 2007/0151333 A1, Jul. 05, 2007 | ||
| Int. Cl. G01M 15/04 (2006.01) | ||
| U.S. Cl. 73—114.42 | 4 Claims |
| 1. A fuel system for an engine comprising:
a flow metering unit having a density meter;
an ultrasonic volume flow sensor located upstream from at least one fuel nozzle;
a controller in communication with the density meter and the ultrasonic flow sensor and programmed to calculate mass flow
to the at least one fuel nozzle;
wherein said volume flow sensor and said density meter each have a temperature sensor for measuring temperature; and
wherein said temperature sensor in said ultrasonic sensor is out of phase with piezoelectric crystals in said ultrasonic sensor.
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