US 12,448,938 B2
Internal combustion engine monitoring system
Michael S. Marchionda, Washington, IL (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Jun. 28, 2023, as Appl. No. 18/215,589.
Prior Publication US 2025/0003376 A1, Jan. 2, 2025
Int. Cl. F02M 35/09 (2006.01); B01D 35/143 (2006.01); B01D 46/00 (2022.01); F02M 35/10 (2006.01); F02M 35/16 (2006.01)
CPC F02M 35/09 (2013.01) [B01D 46/0086 (2013.01); F02M 35/1038 (2013.01); B01D 35/1435 (2013.01); B01D 2279/60 (2013.01); F02M 35/164 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An internal combustion engine monitoring system, the system comprising:
a fluid filter disposed between at least one fluid inlet of an internal combustion engine and at least one of a fluid source or an ambient fluid environment;
a first fluid sensor arranged to receive a first indication of respective fluid pressures on first and second sides of the fluid filter at a first engine operating condition;
a second fluid sensor arranged to receive a second indication of the respective fluid pressures on the first and second sides of the fluid filter at a second engine operating condition;
processing circuitry configured to monitor a pressure differential over time across first and second sides of the fluid filter to estimate fluid flow across the fluid filter, the processing circuitry configured to:
adjust at least one parameter of the received first and second indications of respective fluid pressures to mitigate a difference attributable to a difference between the first and second engine operating conditions; and
compare the adjusted first respective indications of the fluid pressures with the adjusted second respective indications of the fluid pressures; and
a user interface to generate an alert indicating a condition of the engine fluid filter based on the monitored pressure differential, the alert triggered by the processing circuitry based on the determined pressure differential exceeding a specified threshold differential.