Two-level pressurization valve controlled by a fuel meter

Details Two-level pressurization valve controlled by a fuel meter Two-level pressurization valve controlled by a fuel meter

F - Mech Eng,Light,Heat,Weapons

02

C

F02C 7/22 (2006.01) F02C 9/28 (2006.01)

Patent

CA 2364181

A fuel injection system to a turbine engine, including a high pressure pump (10) to pressurize at a high pressure P1 the fuel from a fuel tank (12), a plurality of fuel injectors (16) arranged in a combustion chamber of the turbine engine (18), and a metering element (14) interposed between the said high pressure pump and the plurality of injectors for controlling the fuel flow to the injectors from the high pressure pump, the said metering element having a pressurization valve (28) controlled according two levels of pressurization from a metering valve (22) supplied with fuel from the high pressure pump. An electric shutoff valve (26) adapted to act on the pressurization valve is also provided to stop the fuel supply toward the injectors.

Système d'injection de carburant dans une turbomachine, comprenant une pompe haute pression (10) pour pressuriser à une haute pression P1 le carburant issu d'un réservoir de carburant (12), une pluralité d'injecteurs de carburant (16) disposés dans une chambre de combustion de la turbomachine (18), et un dispositif de dosage (14) interposé entre cette pompe à haute pression et la pluralité d'injecteurs pour contrôler le débit de carburant s'écoulant dans les injecteurs depuis la pompe à haute pression, le dispositif de dosage comporte un clapet de pressurisation (28) piloté selon deux niveaux de pressurisation à partir d'un clapet doseur (22) alimenté en carburant depuis la pompe à haute pression. Un électro-robinet d'arrêt (26) destiné à agir sur le clapet de pressurisation est en outre prévu pour couper l'alimentation en carburant des injecteurs.

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