Methods and system for diagnosing a high-pressure fuel pump in a fuel system
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United States of America Patent
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Jun 6, 2023
Grant Date -
Sep 9, 2021
app pub date -
May 25, 2021
filing date -
Jan 30, 2017
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Abstract
Systems and methods are provided herein for tracking degradation of a high-pressure fuel pump. In one example, a fuel system controller is configured to receive an output pressure signal from a pressure sensor, transform the output pressure signal to the frequency domain to generate frequency content of the output pressure signal, and diagnose a condition of a fuel pump based at least in part on the frequency content of the output pressure signal, the fuel pump fluidly coupled to a fuel injector via a common fuel rail, and the fuel injector is operable to inject fuel to a cylinder of an engine.
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