Integrated fuel system unit with two-stage marine fuel pump
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Jun 4, 2002
Grant Date -
N/A
app pub date -
Apr 18, 2000
filing date -
Apr 18, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An integrated fuel system unit (10) comprises a two-stage fuel pump (16) and fuel filter (34). The fuel filter is interposed between the first and second pump stages (S1,S2) so fuel flowing between the stages is drawn through the filter. A spiral-wound fuel line (44) delivers fuel from a fuel inlet (18) to the first pump stage. Water is circulated about the fuel line to cool the fuel flowing therethrough. A fuel pressure regulator (60) in an outlet (20) of the unit diverts fuel from the engine back to a cavity (36) in which the filter is housed if an overpressure condition occurs. This fuel is then mixed with the fuel flowing between pump stages. Water also collects in the cavity and a solenoid (74) controlled water passage (72) allows this water to be entrained with fuel flowing to the second pump stage for the water and fuel to be mixed together and pumped to an internal combustion engine to be combusted therein.
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