Method and apparatus for indicating a potential fluid filter problem
First Claim
Patent Images
1. A method comprising the steps of:
- obtaining a measured fluid pressure near a fluid filter in an internal combustion engine;
determining a value based on engine speed, engine load, and fluid temperature;
comparing the measured fluid pressure to the value, yielding a compared pressure;
when the compared pressure exceeds an established value, indicating that a potential fluid filter problem is present.
11 Assignments
0 Petitions
Accused Products
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.
36 Citations
17 Claims
-
1. A method comprising the steps of:
-
obtaining a measured fluid pressure near a fluid filter in an internal combustion engine; determining a value based on engine speed, engine load, and fluid temperature; comparing the measured fluid pressure to the value, yielding a compared pressure; when the compared pressure exceeds an established value, indicating that a potential fluid filter problem is present. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A method comprising the steps of:
-
obtaining a measured fluid pressure near a filter in an internal combustion engine;
determining a value that is based on engine speed, engine load, and fluid temperature;determining a difference between the value and the measured fluid pressure; and determining whether to indicate a warning condition for the filter based on the difference. - View Dependent Claims (9, 10, 11, 12, 13)
-
-
14. An apparatus comprising:
-
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; an engine control module arranged and constructed to determine a value based on engine speed, engine load, and fluid temperature, and to compare the value to the measured fluid pressure, and based on results of the comparison, to indicate a warning condition for the filter. - View Dependent Claims (15, 16, 17)
-
Specification