Cummins Filtration Ip, Inc.

Naren Shaam

Barry Mark Verdegan

Wassem Abdalla

Mark T Wieczorek

Charles W Hawkins

Chad M Thomas

Gérard Malgorn

Mark J Johnson

Ted S Loftis

J Bruce Schelkopf

Joe Saxon

Todd Forrest

Various 'no filter, no run' fuel filtration designs are described that include a variable restriction orifice (VRO) designed to vary the amount of fluid, for example fuel, that reaches a fluid outlet. The VRO has a fully open position at which a maximum non-zero fluid flow is permitted, and a fully closed position at which a limited amount of fluid can flow to the outlet. In the case of diesel fuel, the amount of fuel flow permitted at the fully closed position provides lubrication of downstream fuel system components, for example the fuel pump, but is insufficient to permit engine operation.

Filtration system with a variable restriction orifice

A filtration system, for example a fuel filtration system in an engine, that helps prevent engine operation when there is no filter cartridge installed or a non-recommended and/or inferior filter cartridge is installed. The filter cartridge includes first and second endplates, one of which includes a fluid flow passage therein through which fluid can flow. The flow passage connects the clean fluid from the filter to a clean fluid outlet.

Filter cartridge with flow passage in end plate

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Cookeville, TN, United States of America

Naren Shaam