Austro Engine E4 Series User Manual

E4 Series
Maintenance Manual
Engine Fuel
System
Page 2
E4.08.04
Rev. 29
73- System Description
01-Jul-2020
Components of the airframe fuel system
For installation and maintenance instructions refer to the applicable Aircraft Maintenance Manual.
 Feed pump
 Fuel feed line
 Fuel filter
 Fuel return line
 Fuel shut off valve
 Fuel pulsation damper
 Fuel radiator
Components of the engine fuel system
 High pressure pump (HPP)
 High pressure fuel rail
 Low fuel pressure sensor (FPS)
 High fuel pressure sensor
 Fuel temperature sensor (FTS)
 Fuel pressure control valve (PCV)
Fuel Supply System
In the fuel feed line two electric low pressure pumps supply fuel to the high pressure pump.
The fuel filter between pumps and high pressure pump removes the contaminants.
Sensors measure the fuel pressure and temperature at the inlet of the high pressure pump.
In case of a pressure loss, the EECU pumps switch automatically to the inactive pump.
The high pressure pump supplies fuel at up to 1600 bar to the fuel rail. The fuel rail supplies the fuel
to the injectors.
The fuel metering unit at the high pressure pump measures the necessary quantity of fuel that is
compressed.
The necessary rail pressure is measured directly at the rail and is controlled by the rail pressure valve.
A fuel flow of about 4.5 l/min quantity is used to cool and lubricate the high pressure pump. This
excessive fuel is warmed up and flows back through the return line into the fuel tank.

Austro Engine E4 Series Specifications

General

Brand	Austro Engine
Model	E4 Series
Category	Engine
Language	English