SYSTEM AND METHOD FOR DIAGNOSING FLOW THROUGH A PURGE VALVE BASED ON A FUEL SYSTEM PRESSURE SENSOR

摘要

A system according to the principles of the present disclosure includes a pressure sensor, a pressure variation module, and a purge flow diagnostic module. The pressure sensor generates a pressure signal indicating a pressure within a fuel system of an engine. The pressure variation module determines an amount of variation in the pressure signal over a period. The purge flow diagnostic module diagnoses a fault associated with flow through a purge valve of the fuel system when the pressure variation amount is less than a threshold.

主权项

1. A system comprising:
a pressure sensor that generates a pressure signal indicating a pressure within a fuel system of an engine; a pressure variation module that determines an amount of variation in the pressure signal over a period; and a purge flow diagnostic module that diagnoses a fault associated with flow through a purge valve of the fuel system when the pressure variation amount is less than a threshold.