Measuring and testing – Internal combustion engine or related engine system or... – Fuel system or part thereof
Reexamination Certificate
2005-12-15
2009-10-13
McCall, Eric S (Department: 2855)
Measuring and testing
Internal combustion engine or related engine system or...
Fuel system or part thereof
Reexamination Certificate
active
07600417
ABSTRACT:
A fuel delivery system uses a volumetric flow sensor and a densiometer to measure a mass flow rate of the fuel. A densiometer may be a coriolis mass flow sensor etched into a small circuit chip. As fuel flows past the densiometer a density of the fuel and characteristic slope as a function of temperature is determined. At least one temperature sensor is also located on the circuit chip to provide accurate temperature of the fuel to correspond to the fuel density reading. Piezoelectric crystals in the volumetric flow sensor generate and receive a sound wave. By analyzing the sound wave signals the volumetric flow rate of fluid through the volumetric flow sensor can be calculated. At least one temperature sensor is also placed on the volumetric flow sensor to correct for any thermal expansion of an inner diameter of the volumetric flow sensor and for final mass flow calculation. The density and temperature information from the densiometer and the volumetric flow and temperature information from the volumetric flow sensor are used to determine the density of the fuel at the volumetric flow sensor. By using the density calculated at the volumetric flow sensor and using the volumetric flow information an accurate mass flow rate of the fuel at the volumetric flow sensor can be calculated.
REFERENCES:
patent: 3739635 (1973-06-01), Stuart
patent: 3772915 (1973-11-01), Stamler
patent: 4193291 (1980-03-01), Lynnworth
patent: 4450820 (1984-05-01), Haynes
patent: 4508127 (1985-04-01), Thurston
patent: 5284120 (1994-02-01), Fukushima et al.
patent: 6912918 (2005-07-01), Lynnworth et al.
patent: 2002/0194902 (2002-12-01), Gehner et al.
patent: 2003/0183206 (2003-10-01), Fujimoto et al.
patent: 2004/0163459 (2004-08-01), Christian et al.
patent: 2004/0211263 (2004-10-01), Wiesinger et al.
patent: 2005/0049777 (2005-03-01), Fritsch et al.
patent: 006 303 (2005-07-01), None
patent: 0 122 100 (1984-10-01), None
patent: 1 411 328 (2004-04-01), None
European Search Report fo EP Application No. 06256314.3, May 20, 2008.
Carlson & Gaskey & Olds
Hamilton Sundstrand Corporation
McCall Eric S
LandOfFree
Ultrasonic-densiometer mass flow sensor for use in flow... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ultrasonic-densiometer mass flow sensor for use in flow..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultrasonic-densiometer mass flow sensor for use in flow... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4067813