SYSTEM FOR CONTROLLING TWO POSITIVE DISPLACEMENT PUMPS

A fuel system (10), such as for use in an aircraft, comprises a main pump (14), a servo pump (16), a metering valve (24), a shut-off valve (26), an actuator (20) and a pump sharing valve (12). The main pump (14) and the servo pump (16) receive fuel from a source (30). The metering valve (24) receive...

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Bibliographische Detailangaben
1. Verfasser:	HAUGSJAAHABINK, Todd
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AIR INTAKES FOR JET-PROPULSION PLANTS BLASTING COMBUSTION ENGINES CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS GAS-TURBINE PLANTS HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MECHANICAL ENGINEERING WEAPONS
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Beschreibung
Zusammenfassung:	A fuel system (10), such as for use in an aircraft, comprises a main pump (14), a servo pump (16), a metering valve (24), a shut-off valve (26), an actuator (20) and a pump sharing valve (12). The main pump (14) and the servo pump (16) receive fuel from a source (30). The metering valve (24) receives main flow (31) from the main pump (14). The shut-off valve (26) receives fuel flow from the metering valve (24). The actuator (20) receives fuel flow from the servo pump (16). The pump sharing valve (12) receives circulating flow from the servo pump (16) and alternatively directs shared flow to the main flow (31) or an inlet of the servo pump (16). The pump sharing valve (12) also sends main pump flow to supplement the servo pump during shutdown conditions.