Method and apparatus for indicating a potential fluid filter...

Measuring and testing – Internal combustion engine or related engine system or... – Compression

Reexamination Certificate

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C073S117020

Reexamination Certificate

active

10696831

ABSTRACT:
A fluid pressure near a filter (103) is measured and compared (307) to a predetermined value that is based on one or more engine operating parameters. When the measured fluid pressure deviates enough from the predetermined value by an established amount, an indication of the deviation may be provided to notify of a potential problem with the filter (103), such as obstruction, restriction, or some form of clogging.

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