Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Rani Kiwan0
Christopher Paul Glugla0
Gopichandra Surnilla0
Mark Meinhart0
Date of Patent
November 23, 2021
0Patent Application Number
162809950
Date Filed
February 20, 2019
0Patent Primary Examiner
Patent abstract
Methods and systems are provided for estimating ethanol content in fuel, water content in fuel, and an age of the fuel in a vehicle engine. In one example, a method may include estimating fuel ethanol content, water content, or fuel age based on fuel rail temperature, and two or more of a resonant frequency (f) of pressure pulsations, a change in fuel rail pressure (δp), and a damping coefficient (α) of pressure pulsations in the fuel rail as estimated after a fuel injection or a pump stroke. One or more engine operating parameters may be adjusted based on the estimated fuel ethanol content, water content, and fuel age.
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