Method of checking for purge flow in an evaporative emission con

Details Method of checking for purge flow in an evaporative emission con Method of checking for purge flow in an evaporative emission con

1996-03-05

1997-06-24

Dombroske, George M.

Measuring and testing

Simulating operating condition

Marine

123518, 364431055, F02M 3302, G01M 1500

Patent

active

056418990

ABSTRACT:
A method of checking for purge flow in an evaporative emission control system includes the steps of determining if there is a fault in a leak detection pump, de-energizing the leak detection pump if there is a fault, and determining the state of a leak detection pump switch. The method also includes the steps of concluding a pump switch closed state if the pump switch is not opened, concluding a pump switch opened state if the pump switch is not closed, and monitoring a purge duty cycle until the evaporative emission control system is depressurized.

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