Measuring and testing – With fluid pressure – Porosity or permeability
Patent
1990-05-04
1991-08-06
Williams, Hezron E.
Measuring and testing
With fluid pressure
Porosity or permeability
116DIG25, G01N 1508
Patent
active
050366980
ABSTRACT:
A method and apparatus for predicting the remaining service life of an air filter element reads the pressure drop across the filter element at regular usage intervals (such as engine run time or distance the vehicle has traveled). An approximation of the rate at which the pressure drop is increasing is made, which is used to calculate the usage at which the maximum pressure drop will be attained.
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Allied-Signal Inc.
Antonis William N.
Decker Ken C.
Roskos Joseph W.
Williams Hezron E.
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