Fuel composition and aging estimation
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United States of America Patent
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Nov 23, 2021
Grant Date -
Aug 20, 2020
app pub date -
Feb 20, 2019
filing date -
Feb 20, 2019
priority date (Note) -
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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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