Method and apparatus for use with a fluid filter
First Claim
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1. A method comprising the steps of:
- obtaining a measured fluid pressure near a filter in an internal combustion engine;
determining a predetermined value based on at least one engine operating parameter; and
comparing the measured fluid pressure to the predetermined value, yielding a compared pressure;
when the compared pressure exceeds an established value, indicating that a potential fluid problem is present.
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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.
31 Citations
17 Claims
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1. A method comprising the steps of:
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obtaining a measured fluid pressure near a filter in an internal combustion engine;
determining a predetermined value based on at least one engine operating parameter; and
comparing the measured fluid pressure to the predetermined value, yielding a compared pressure;
when the compared pressure exceeds an established value, indicating that a potential fluid problem is present. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method comprising the steps of:
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obtaining a measured fluid pressure near a filter in an internal combustion engine;
determining a predetermined value that is a function of at least one engine operating parameter;
determining a difference between the predetermined value and the measured fluid pressure; and
determining whether to indicate a warning condition based on the difference. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. An apparatus comprising:
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a pressure sensor arranged and constructed to measure a pressure of a fluid near a filter for the fluid of an internal combustion engine, yielding a measured fluid pressure; and
an engine control module arranged and constructed to determine a predetermined value based on at least one engine operating parameter and to compare the predetermined value to the measured fluid pressure. - View Dependent Claims (15, 16, 17)
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Specification