Filter diagnostics and prognostics

Patent metadata

Field	Value
Publication number	US-10697337-B2
Application number	US-201715804425-A
Country	US
Kind code	B2
Filing date	Nov 6, 2017
Priority date	Jan 16, 2015
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

Various systems and methods are provided for a lubricant filter. In one example, a method for a lubricant filter comprises indicating a condition of the filter based on a difference between a measured pressure differential and an expected pressure differential during select conditions in which all lubricant pumped by a pump upstream of the filter flows into the filter.

First claim

The invention claimed is:

1. A method for an engine lubricant filter of a vehicle, comprising:
adjusting engine operation and indicating a condition of the engine lubricant filter via a controller based on a difference between a measured pressure differential and an expected pressure differential as determined via the controller, the difference determined only during conditions in which all lubricant pumped by a pump upstream of the engine lubricant filter flows through the engine lubricant filter and does not bypass the engine lubricant filter.

2. The method of claim 1 , wherein during the conditions in which all lubricant pumped by the pump flows through the engine lubricant filter and does not bypass the engine lubricant filter, an outlet pressure of the pump is limited via the controller such that one or more valves that enable lubricant bypass around the engine lubricant filter are maintained fully closed.

3. The method of claim 1 , where engine operation is adjusted in response to a determination that the engine lubricant filter is clogged as determined via the controller in response to the difference between the measured pressure differential and the expected pressure differential being near a filter bypass value setpoint.

4. The method of claim 1 , where adjusting engine operation includes limiting a speed of an engine via the controller.

5. The method of claim 1 , further comprising a filter bypass valve for bypassing lubricant around the engine lubricant filter, the filter bypass valve having an actual filter bypass valve setpoint, the controller having a stored filter bypass valve setpoint, and indicating that the actual filter bypass valve setpoint is faulted high via the controller in response to the measured pressure differential being substantially greater than the stored filter bypass valve setpoint.

Assignees

• Ford Global Tech Llc

Inventors

• Pursifull Ross Dykstra

Classifications

• F01M1/16

  Controlling lubricant pressure or quantity (rendering machines or engines inoperative or idling on lubricant pressure failure F01M1/22) · CPC title

• B01D35/1475

  Pressure relief valves or pressure control valves · CPC title

• F01M2001/1092

  comprising valves bypassing the filter · CPC title

• F01M1/18 Primary

  Indicating or safety devices (concerning lubricant level F01M11/06, F01M11/12) · CPC title

• F16N2250/04

  Pressure · CPC title