Fluid sprinkling – spraying – and diffusing – With system fluid relief or return to supply – Recirculation within nozzle
Patent
1981-01-13
1982-08-31
Weakley, Harold W.
Fluid sprinkling, spraying, and diffusing
With system fluid relief or return to supply
Recirculation within nozzle
137312, 137509, F02M 4702
Patent
active
043468411
ABSTRACT:
A fuel injection nozzle unit includes a differential valve member biased by a spring to a closed position and opened to allow fuel flow through an outlet by fuel under pressure from an inlet. The spring is housed within a spring chamber and fuel leaking into this chamber is vented to the inlet when delivery of fuel has ceased. A relief valve is provided which has a valve element having a surface exposed to the pressure in the chamber and an opposing surface exposed to the pressure exterior of the nozzle unit. The valve element is biased to a closed position by a spring and it controls flow along a path from the chamber to the inlet. The flow path also incorporates a non-return valve. The valve element is set to lift from its seating at a pressure which is greater than the residual pressure in the inlet plus the pressure required to open the non-return valve.
REFERENCES:
patent: 3948446 (1976-04-01), Goyal
patent: 4186884 (1980-02-01), Mowbray
patent: 4261513 (1981-04-01), Andrews
Lucas Industries Limited
Weakley Harold W.
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