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

Aircraft Propulsion, An aircraft is flying at a speed of 500 ft/s an altitu...

An aircraft is flying at a speed of 500 ft/s an altitude of 20,000 ft, where the atmospheric temperature and pressure are 447.3°R and 972.5 lbf/ft2, respectively. If the inlet / di

Fire precautions - fire protection engineering, Fire precautions - fire pro...

Fire precautions - fire protection engineering: Fire precautions include: Protecting escape routes in fire resisting construction, Providing fire doors between

Propeller pitch control, Propeller pitch control: Before looking at pro...

Propeller pitch control: Before looking at propeller pitch control an understanding of the relationship between the 'Power Lever' and the 'RPM (condition / speed) Lever' with r

Tube drawing, Drawing operation can also be used for reducing the tube cros...

Drawing operation can also be used for reducing the tube cross-section. The drawing equipment consists of draw bench and die. One end of the tube is pulled through the die over a f

System dynamics , System Dynamics  Crucial to the development of a guid...

System Dynamics  Crucial to the development of a guidance system is an understanding of the dynamics of the system. In particular, it is necessary to understand how the acceler

Hp air for aircraft services, Hp air for aircraft services: A number of...

Hp air for aircraft services: A number of aircraft accessories produce sufficient heat in normal use to require a cooling system to prevent overheating. A good example is the

Matlab assignment, can you formulate a program using only bubblesort for as...

can you formulate a program using only bubblesort for assigning grades in an array?

Sizing, Q. What is the purpose of :          (i) Sizing,            ...

Q. What is the purpose of :          (i) Sizing,                  (ii) Coining operations in powder metallurgy,         (iii) Infiltration,           (iv) Impregnati

Bme, advantages and disadvantages oh hot and cold die working in the subjec...

advantages and disadvantages oh hot and cold die working in the subject of basic mechanical engineering

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