Method for determining malfunction of pressure sensor
AssigneeHyundai Motor Company
InventorJoon Cho
Life of this patent
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Abstract
A method for determining a malfunction of a pressure sensor determines that a stick malfunction occurs in the pressure sensor by an ECU calculating a difference between a maximum value and a minimum value of a voltage value output from the pressure sensor mounted in a fuel tank and determining that a malfunction has occurred in a case that the difference is less than a predetermined value.
Claims8
A method for determining a malfunction of a pressure sensor detecting a pressure in a fuel tank and outputting a corresponding signal, the method comprising:
- determining whether predetermined monitoring conditions are satisfied;
- determining whether a difference between a maximum value and a minimum value of output values output from the pressure sensor during a predetermined period is less than a predetermined value in a case that the predetermined monitoring conditions are satisfied;
- and
- determining that the pressure sensor is malfunctioning if a case that the calculated difference is less than the predetermined value successively occurs as much as a predetermined number of times.
A method for determining a malfunction of a pressure sensor in a vehicle fuel tank, comprising:
- determining that predetermined monitoring conditions are satisfied;
- determining a maximum value and a minimum value output by the pressure sensor during a predetermined period;
- calculating a difference between said minimum and maximum values;
- comparing said difference to a predetermined value;
- and
- determining that the pressure sensor is malfunctioning when said difference is less than the predetermined value in a predetermined number of successive comparisons.
Dependencies are inferred from the claim text.