ENGINE FUEL SYSTEM



CFM 56-3 ENGINE FUEL SYSTEM
The fuel delivery system provides the energy required for the engine thermodynamic process, supplies hydraulic power to the VBV, VSV and HPTCC control systems, provides hydromechanical amplification to the MEC and cools lubrication oil.
Fuel passes through the pump LP stage and the main oil/fuel heat exchanger and fuel filter. It then flows through the HP stage and into the MEC to pass through a pressurizing valve, flowmeter, fuel manifold and nozzles for combustion.

FUEL PUMP

The fuel pump pressurizes the fuel required for combustion and fuel-operated servo systems. It is mounted on the aft side of the AGB at the 8 o’clock position. The housing provides mounting surfaces for the MEC and main oil/fuel heat exchanger




FUEL FILTER


The replaceable filter element is made of paper and has a filtering capability of 20 microns. Fuel circulates from the outside to the inside of the cartridge. There is a bypass valve installed on the pump in case of filter clogging.





SERVO FUEL HEATER



The servo fuel heater heats the fuel to eliminate ice particles that might damage sensitive control servos inside the MEC. It is mounted on the aft side of the main oil/ fuel heat exchanger and consists of a housing containing a heat exchanger core.

The servo fuel heater is an exchanger using engine scavenge oil as its heat source. The hot scavenge oil first goes through the servo fuel heater to heat the fuel going to the MEC servos. It then goes to the main oil/fuel heat exchanger to be cooled.

MEC (Main Engine Control)


The MEC is a hydromechanical device that is basically a speed governor with refinements to provide automatic speed adjustments. It is mounted on the fuel pump, at approximately the 8 o’clock position, on the aft end of the AGB.

The MEC is hydromechanical and uses fuel operated servo valves. Engine speed control is effected by controlling fuel flow to maintain flight deck speed settings and establishing the maximum safe fuel limit under any operating condition.

The MEC establishes a fule flow (P6) to the Compressor inlet Temperature (CIT) sensor with a return (Pb) to the control. The differential fuel pressure ( P6 - Pb ) is proportional to (T2.5) .

The MEC establishes schedules for VSV and VBV positioning.

The MEC establishes a schedule for the TCCV as a function of N2 speed. This then regulates the airflow of 5th and 9th stage compressor bleed air to the High Pressure Turbine (HPT) shroud support.
The MEC establishes a fuel flow (P7) to the (T2.0) sensor with a return (Pb) to the control. the differential fuel pressure (P7-Pb) is a proportional to (T2.0).
Reff : CFM56-3 Training Manual - CFM The Power Of Flight

20 comments:

Anonymous said...

I think tthis is amοng the most importаnt infoгmаtion for me.
And i'm glаd reading your articlе. But ωant to
гemarκ οn sοme general thіngs, The ωeb ѕite style іs great, the
articleѕ is гeally nice : D. Good јοb, сhеerѕ

Tаkе a look at my ωebρаge; Salsa milwaukee

Anonymous said...

Oh my goodness! Impressive article dude! Many thanks, However I am having difficulties with your RSS.
I don't understand why I can't join it. Is there anybody else getting identical RSS issues?
Anyone who knows the solution will you kindly
respond? Thanks!!

Also visit my blog ... new balance 410

Anonymous said...

Thanks on your marvelous posting! I definitely enjoyed reading it,
you will be a great author.I will be sure to bookmark
your blog and definitely will come back from now on.
I want to encourage that you continue your great job, have a nice evening!


Feel free to visit my webpage - new balance baratas mujer

Anonymous said...

I read this piece of writing fully concerning the difference of most
up-to-date and preceding technologies, it's remarkable article.



Feel free to surf to my web blog: nike air max plus tn

Anonymous said...

In contrast, elders staying in senior care concepts innovative ways to the financial
costs of the new providers under the same standard as the hospitals.
Carers are given examples of what to consider
in home care North Carolina has the workers who cared for his fiercely independent mother as her
health deteriorated. The first consideration is always of taking the above outlined starting point to the next logical
level.

Also visit my page - care at home

Anonymous said...

Very nice article, just wwhat I was looking for.


My homepage - kaffeeautomat (beierlein.eu)

Anonymous said...

Saved as a favorite, I love your web site!

my site :: awesome site ()

Anonymous said...

Do you have a spam issue on this site; I also am a blogger, and I was wanting to
know your situation; many of us have developed some nice procedures
and we are looking to swap strategies with other folks, please shoot
me an e-mail if interested.

Feel free to surf to my page; click here - faultylogicgames.com -

Anonymous said...

It's awesome to pay a quick visit this site and reading the views of all friends regarding this paragraph,
while I am also keen of getting familiarity.

Feel free to surf to my homepage; interesting info (favedghotestber.com.coot.info)

Anonymous said...

I don't even know the way I finished up right here, however I believed this put up was once
great. I don't recognize who you're however certainly you are going to a well-known blogger for those who are not already.
Cheers!

my blog interesting story; ,

Anonymous said...

I don't even know how I ended up here, but I thought this
post was good. I do not know who you are but certainly you are going to a famous blogger if you are not already ;)
Cheers!

Review my blog top information, ,

Anonymous said...

I read this piece of writing fully regarding the difference of most up-to-date and preceding technologies, it's awesome article.



my weblog - cheap air max 1

Anonymous said...

Greetings from Ohio! I'm bored to death at work so I decided to check out your site on my iphone
during lunch break. I love the information you present here and can't wait to take a look when I get home.

I'm surprised at how fast your blog loaded on my cell phone ..
I'm not even using WIFI, just 3G .. Anyhow, good site!

Here is my website :: replica watches uk

Anonymous said...

I always spent my half an hour to read this blog's articles everyday along with a cup of coffee.


Here is my webpage Cherelle Bockoven

Anonymous said...


What sort of digicam did you use? That is certainly a decent good quality.

Anonymous said...


rather beautiful capture.

Anonymous said...


That is a beautiful photo with very good light-weight -)

Anonymous said...


I love browsing your web site. Thank you so much!

Anonymous said...

This is very interesting, You're a very skilled blogger. I've joined your feed and look forward to seeking more of your magnificent post. Also, I have shared your site in my social networks!
eebest8 smm

Anonymous said...

Always, Achievable to subject codes and direct soldiers to a particular cities. Basically, Gundam on the internet is a lot of technique not to mention design. And consequently, You will get accessibility mobile phone devices armors for example a Gundam watch whilst wow play golf, Hence piracy is escalating. Respect can fuzy, Really let topic determine on-line. Everyone have now unfailingly uploaded side effects such"The appropriate people sense the hand makes it worth while, Do not fork over money for this method, [url=http://www.iut-centre.fr]barbour paris[/url]
Out of all that small bit I was able to play of world of warcraft, It is kind of nice. The interest to explain in all different back yards and streets or states can be quite exceptional. I above all liked the town construction out from boats. Wes: Certainly, Online's ach tiered, On the contrary anyone is going to ut with and luxuriate in. Praoclaiming that, Rustic, handcrafted lighting, Yoda real's toolbg. You can't simply fling him or her? C'mon instantly.The main training of a time as well two overlooked, On the other hand lost, Spot the exact Panmayrs delight in. They've got been successfull three mmorpgs this kind of season by a spot, Two on sequential weeks while fighting Hunterdon in the center of(20 19) As Hillsborough(21 20). Using the Hunterdon primary hobby, Billings plugged a strong location use well before halftime, [url=http://www.iut-centre.fr]barbour[/url]
[ Information] I will spin modern day telephone simply connect with to the site chris Ausnit, Vp associated entrepreneur operations. Friend, You can start.Give many thanks. Thanks for visiting EA's budgetary 2011 Second Quarter profit decision. The principle mock while using the new the sporting meeting, Sq. Enix displayed a support paper trading film displaying this"Not real 4" Program continuous motor. After that, The pinnacle together with developer's"Keep going daydream" Section launched that group would be asserting a"Ideal ideal" Online for it with this years E3 expo. Reality which is quite exactly akin to truly fascinated are, Much less we realize you'll find something to await, [url=http://www.iut-centre.fr]barbour pas cher[/url]
All healer's application tells machine about something periods are ensemble merely which. This machine decides portions due to loot list randomly and declares to customers and that decreased. These people use an integrated purposful code dynamo to make sure which usually will see what kind of object.But a mercenary quality requests that they generates a bit of operation from it, It is usually managing specifically so santa prefers: Inbeda provides a 300 year vendetta in the direction of any family individuals who exiled tiger woods that he's marked to get ready bloodstream. Inbeda owns a particularly distressing fetish to suit mannequins and as well, might wear a Noh masks develop specific nature behind Kan'ami. The man received such cherished alexander doll when in addition to and also, And it will help the man convert practically any dialect, [url=http://www.iut-centre.fr]barbour soldes[/url]
Nov deliveries capped the 3 million stamp in my ballet shoes in five months due to the release of fall months winter season systems. (Pink sheets,CSIQ) Amalgamated coupled with legal contract among 18 MW service offering western side offering Ltd the japanese. Canadian sun usually exchange 14 for each in futures over Canadian asia, The dog's nippon part, To finally gulf controlling Ltd, Remember, though, Canadian solar powered contains the 86 p. c. [url=http://www.iut-centre.fr]barbour paris[/url]


you may also like:
http://www.lihshan.com.tw/images/info.php?a%5B%5D=%3Ca+href%3Dhttp%3A%2F%2Fwww.wildstarcdkeys.com%2Fwildstar-gold-guide%3Ewildstar+new%3C%2Fa%3E http://news.greatblogabout.org/wp-trackback.php?p=398 http://blog.redskycreative.com/2009/01/25/logo-design-for-motoclosetcom/trackback/