Method and apparatus for detecting a fouled fluid filter
First Claim
1. A method of detecting a fouled fluid filter having fluid flowing through the filter via a fluid inlet and a fluid outlet with a fluid pressure, P2, at the outlet, comprising the steps of:
- a) generating a correction pressure, PC, such that a corrected pressure drop. P2-PC, for a fouled fluid filter will reach a predetermined threshold value before the fluid flow rate through the filter reaches a maximum value;
b) determining a corrected pressure drop P2-PC;
c) repeating steps a) and b) during operation of the fluid filter and actuating an alarm if the determined corrected pressure drop reaches the predetermined threshold value.
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Abstract
A method and apparatus for detecting a fouled fluid filter are disclosed in which the fluid pressure at the outlet of the fluid filter is corrected by a correction pressure to determine a corrected pressure drop. Such a corrected pressure drop has a mathematical function which passes through a maximum magnitude before the fluid flowing through the fluid filter reaches a maximum value. The corrected pressure drop is monitored during the operation of the fluid filter and when the corrected pressure drop reaches a predetermined threshold value, before the engine with which the fluid filter is associated reaches its maximum power, an alarm will be actuated.
100 Citations
9 Claims
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1. A method of detecting a fouled fluid filter having fluid flowing through the filter via a fluid inlet and a fluid outlet with a fluid pressure, P2, at the outlet, comprising the steps of:
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a) generating a correction pressure, PC, such that a corrected pressure drop. P2-PC, for a fouled fluid filter will reach a predetermined threshold value before the fluid flow rate through the filter reaches a maximum value; b) determining a corrected pressure drop P2-PC; c) repeating steps a) and b) during operation of the fluid filter and actuating an alarm if the determined corrected pressure drop reaches the predetermined threshold value. - View Dependent Claims (2, 3)
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4. Apparatus for detecting fouling of a fluid filter having fluid flowing through the filter via a fluid inlet and a fluid outlet with a fluid pressure, P2, at the outlet, comprising:
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a) means for generating a correction pressure PC, such that a corrected pressure drop. P2-PC. for a fouled fluid filter will reach a predetermined threshold value before the fluid flow rate through the filter reaches a maximum value; b) means for determining a corrected pressure drop P2-PC; and
,c) alarm means connected to the means for determining a corrected pressure drop P2-PC for actuating an alarm if the determined corrected pressure drop reaches the predetermined threshold value. - View Dependent Claims (5, 6, 7, 8, 9)
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Specification