Liquid purification or separation – Flow – fluid pressure or material level – responsive – Fluid pressure responsive by-pass
Patent
1981-01-21
1981-12-01
Adee, John
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Fluid pressure responsive by-pass
210137, 210314, 2104164, B01D 3502
Patent
active
043035132
ABSTRACT:
A diesel fuel pick-up tube has two branches in the fuel tank. One is connected to a fuel strainer having openings of approximately 130 microns and the other is connected to a strainer having openings of about 400 to 500 microns. A vacuum relief valve is in the pick-up branch connected to the coarser strainer and is set to open at a predetermined amount of vacuum on the order of five inches of Mercury. The strainer with the finer mesh would therefore normally pass fuel but not wax crystals when the diesel fuel has reached the cloud point. Only if the finer mesh strainer is sufficiently clogged with wax crystals to cause the vacuum in the pick-up tube to open the relief valve would fuel be taken in through the coarser of the two strainers. Both strainers will prevent water from entering the pick-up tube.
REFERENCES:
patent: 2367055 (1945-01-01), Rike et al.
patent: 3282428 (1966-11-01), Rosaen
patent: 3900397 (1975-08-01), Bell
patent: 4201044 (1980-05-01), Dodd
The Parameters that Control the Performance of the In-Tank Fuel Strainer by Miller in SAE Technical Paper Series 790091, Society of Automotive Engineers, Warrendale, Pa. Feb. 26, 1979.
Reducing Low Temperature Wax Plugging in Fuel Systems of the Diesel Passenger Car by Muzatko in SAE Technical Series 800222, Feb. 25, 1980.
Cold Weather Fuel Requirements of Oldsmobile Diesels by Taniguchi and Benson, Feb. 25, 1980.
Adee John
General Motors Corporation
McGraw D. D.
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