Patent ID: 11911721
Assignee: CUMMINS INC.
Field: Chemical engineering (Chemistry)
Classification: CPC B  F | IPC B  F

Claim 9:
10. A fuel filtration system, comprising:
a first stage filtration bank, comprising:
a first fuel filter head fluidly coupled to a plurality of first fuel filters;
a first pressure sensor associated with the first fuel filter head;
a second fuel filter head fluidly coupled to a plurality of second fuel filters, the second fuel filter head separable from the first fuel filter head and mounted so as to be spaced from the first fuel filter head; and
a second pressure sensor associated with the second fuel filter head, wherein the first pressure sensor is configured to cause a malfunction signal to be generated when the pressure in the first fuel filter head exceeds a threshold value, and the second pressure sensor is configured to cause the malfunction signal to be generated when the pressure in the second fuel filter head exceeds the threshold value;

a fuel transfer pump downstream from the first stage filter bank;
a second stage filtration bank fluidly coupled to the fuel transfer pump;
a double selector valve coupled to the first fuel filter head and the second fuel filter head and configured to modulate flow between the plurality of first fuel filters and the plurality of second fuel filters, the double selector valve separable from the first fuel filter head and the second fuel filter head, the double selector valve including:
a valve housing comprising a bore, the valve housing defining:
a primary valve inlet port,
a primary valve outlet port fluidly coupled to the fuel transfer pump via a fuel filter line,
a first fuel filtration outlet fluidly coupled to an inlet of the first fuel filter head via a first fuel inlet line,
a first fuel filtration inlet fluidly coupled to an outlet of the first fuel filter head via a first fuel outlet line,
a second fuel filtration outlet fluidly coupled to an inlet of the second fuel filter head via a second fuel inlet line,
a second fuel filtration inlet fluidly coupled to an outlet of the second fuel filter head via a second fuel outlet line;

an elongated body positioned within the bore of the valve housing, the elongated body comprising an exposed portion protruding outwardly from a first end of the valve housing, the elongated body configured to selectably fluidly couple at least one of the first filter head or the second fuel filter head to the primary valve outlet port; and
a single valve actuator coupled to the exposed portion of the elongated body and configured to actuate the elongated body, the elongated body configured to move between the first position and the second position so as to bring the second fuel filter head online to permit fuel filtration to continue without requiring an engine shutdown.