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

Avionic systems design- primed stability derivatives, Primed stability der...

Primed stability derivatives The rolling and yawing motions are coupled through the cross inertia I XZ due to rotation not being about the principal axes. Since in general air

Thermo electric thermometer, how thermoelecteric thermometer is contructed ...

how thermoelecteric thermometer is contructed and how it working

Falling weight impact testing , Drop-weight impact towers are frequently us...

Drop-weight impact towers are frequently used to generate low velocity impact damage. Typically, the falling mass will be instrumented, containing a load-cell for measuring the lo

Describe the antenna properties, Question: (a) Describe the following ...

Question: (a) Describe the following antenna properties / characteristics: (i) radiation pattern (ii) the main beam and beamwidth (iii) sidelobes (iv) directivity

Technical drawing, career aspiration as a determinant to senior secondary ...

career aspiration as a determinant to senior secondary school students performance in Technical drawing.

True or false, Beta coefficients and standard deviation may be used as indi...

Beta coefficients and standard deviation may be used as indicators of risk

KK-3 system coding, how to write code for any particle shape using KK-3 sys...

how to write code for any particle shape using KK-3 system coding in grope technology

Crystal structure, how can we determine the crystal structure of material b...

how can we determine the crystal structure of material by having interplanar spacing d?

Securities analysis coursework, Company: British Sky Broadcasting Topic: Yo...

Company: British Sky Broadcasting Topic: You are a security analyst in a large investment house and must write a report on a real stock of your choice, giving a buy, hold or sell r

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