Electro-mechanical fuel control, Other Engineering

Assignment Help:

Electro-mechanical fuel control:

The start fuel valve and ignition are energised as soon as rotation (3%) is sensed by an Electronic Sequence Unit (ESU). At 14% and with rising EGT the main fuel valve is opened. The acceleration rate is controlled by the acceleration schedule adjuster, however this is modified by the differential pressure regulator which uses compressor discharge pressure to vary the fuel flow to the engine. At 50% the starter cuts out. When the engine reaches 85% the start fuel valve closes and the ignition is de-energised. The engine governor then takes over and controls the engine to 100%. As the engine passes 95% plus 3 seconds, the max fuel valve energises open and bypasses the acceleration adjuster and full control of the engine is given to the governor. If the engine is shut down both the Main and Max fuel valves are closed.

418_Electro-mechanical fuel control.png

The ESU has indicators that indicate which step of the start sequence the APU is at and the resets at 95% + 3sec to act as BITE indicators.

 


Related Discussions:- Electro-mechanical fuel control

Investment allowance, Investment allowance Until a few years ago, a compan...

Investment allowance Until a few years ago, a company could charge an amount equal to 25 per cent of the original value of an asset as investment allowance in the period in which

Principles of jet propulsion, Principles of Jet Propulsion: Newton 's...

Principles of Jet Propulsion: Newton 's Laws of Motion. To understand the basic principles of jet propulsion it is necessary to understand the practical application of Sir I

Define Thermal equilibrium, Thermal equilibrium The definition and measurem...

Thermal equilibrium The definition and measurement of temperature must be logically preceded by the concept of thermal equilibrium and the Zeroth law. To determine operationally wh

Risk and return, if we are comparing the risk and return of two stocks. wha...

if we are comparing the risk and return of two stocks. what to calculate, what to analyza and what conclude

Prepare a short document to sensitise public, Since the introduction of mob...

Since the introduction of mobile phones and other smart devices, concerns (both scientific and public) have been raised about the potential health impacts from regular use. Numerou

Aircraft controls, The aerodynamic flight controls of a typical aeroplane ...

The aerodynamic flight controls of a typical aeroplane include ailerons (British: ξ ("Xi"); US: da or δa), elevator (British: η ("eta"); US de or δe), and rudder (British: ζ ("zeta

Embedded system, need it in 10 days time and in Australian cods if there is...

need it in 10 days time and in Australian cods if there is

Aviation legislation - permit to fly, PERMIT TO FLY A Permit to Fly may...

PERMIT TO FLY A Permit to Fly may be issued to an aircraft that does not, for a variety of reasons, fully comply for a Certificate of Airworthiness. These reasons might be b

Scr, briefly explain the switching characteristics of SCR

briefly explain the switching characteristics of SCR

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd