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

Radar engineering, Calculate the maximum range when radar operates at 10GHz...

Calculate the maximum range when radar operates at 10GHz and has peak power=10 Mwatt,S/N ratio=10dB,antenna cross section=100 mm2,target cross section=10mm2.The gain of transmittin

Tensile strength of core materials , The tensile strength of the core mate...

The tensile strength of the core material in a sandwich structure can be determined using the flat-wise tension fixture shown below. The sandwich is bonded between two al

Nomenclature, Nomenclature • Information source device producing inform...

Nomenclature • Information source device producing information to be communicated • Binary digit (bit) fundamental information unit for all digital systems; unit of informat

Model independent option valuation , Derive the functional relationship bet...

Derive the functional relationship between the no-arbitrage values of the two vertical spreads, C (K1)-C (K2) and C (K2)-C (K3).

Aviation legislation - dealer’s certificate , DEALER'S CERTIFICATE Refere...

DEALER'S CERTIFICATE Reference: When the sale of an aircraft involves flight without a Certificate of Registration, The C.A.A. will permit the aircraft to fly under certain re

Mechanics, an electric bulb weighing 15n hangs from a point C by 2 strings ...

an electric bulb weighing 15n hangs from a point C by 2 strings AC and BC .string AC is inclined at 60degree to horizontal and BC at 45 degree to vertical.find tension in string.

Facilty design, List three advantages and three disadvantages of open offic...

List three advantages and three disadvantages of open office spaces.

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