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ENGINE FUEL DISTRIBUTION -INTRODUCTION
Purpose
The engine fuel distribution system components pressurize and clean (filter) fuel from the airplane. They also put (inject) metered fuel into the engine.
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ENGINE FUEL DISTRIBUTION -INTRODUCTION
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ENGINE FUEL DISTRIBUTION -GENERAL DESCRIPTION
General
The fuel pump receives fuel from the airplane fuel system. The low pressure boost stage of the pump pressurizes the fuel and sends it to the fuel/oil cooler (FOC).
The fuel flows from the FOC, through the fuel pump filter element, and then to the high pressure main stage of the pump. The fuel pump filter element and housing are part of the pump.
The high pressure main stage increases the fuel pressure and sends it to the fuel metering unit (FMU). It also supplies servo fuel to the servo fuel heater and engine components.
Fuel for combustion (metered fuel) goes through the fuel flow transmitter to the distribution valve. The fuel distribution valve supplies metered fuel to the fuel supply manifolds. The fuel distribution valve also has a strainer.
The fuel injectors get the metered fuel from the fuel supply manifolds and spray the fuel into the engine for combustion.
BEJ ALL POST SB 777-71-0032
Fuel that the FMU does not use for combustion (FMU bypass fuel) goes to the fuel bypass valve. The fuel bypass valve sends the FMU bypass fuel to the FOC. The fuel bypass valve attaches to the pump.
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Fuel that the FMU does not use for combustion (FMU bypass fuel) goes to the FOC.
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EFFECTIVITY BEJ ALL POST SB 777-71-0032 73-11-00
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BOEING PROPRIETARY -Copyright # -Unpublished Work -See title page for details.
ENGINE FUEL DISTRIBUTION -COMPONENT LOCATIONS
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：777 AMM 飞机维护手册 发动机和燃油控制 Engine Fuel and Control PW 777 AIRCRAFT MAINTENANCE MANUAL(4)
