Systems and method for performing prognosis of fuel delivery systems using solenoid current feedback

A fuel delivery system comprising:

• a fuel pump having a pumping chamber and a closeable inlet valve;
• a fuel rail configured to communicate pressurized fuel received from the fuel pump to at least one engine cylinder;
• and
• a control system comprising a memory and an instruction set, the instruction set executable to:
• determine a current feedback of the closeable inlet valve;
• determine whether the current feedback is less than a predetermined low current threshold;
• determine a magnitude of variation of the current feedback;
• determine whether the magnitude of variation of the current feedback exceeds a predetermined variation threshold;
• indicate a potential valve electrical connection fault if the current feedback is less than the predetermined low current threshold and less than the predetermined variation threshold;
• and
• indicate a potential valve weakened electromagnetic field fault if the current feedback is greater than the predetermined variation threshold.

A direct-inject fuel pump prognosis system comprising a memory and an instruction set, the instruction set executable to:

• determine a current feedback of a closeable inlet valve;
• determine a mean current based on the current feedback;
• determine whether one of the current feedback and the mean current is less than a predetermined low current threshold;
• determine a magnitude of variation of the current feedback;
• determine whether the magnitude of variation of the current feedback exceeds a predetermined variation threshold;
• determining whether the mean current is greater than a predetermined high current threshold;
• indicate a potential valve electrical connection fault if the current feedback is less than the predetermined low current threshold and less than the predetermined variation threshold;
• and
• indicate a potential valve weakened electromagnetic field fault if at least one of the following is true:
• a) the current feedback is greater than the predetermined variation threshold;
• and b) the mean current is greater than the predetermined high current threshold.