induction system

[e_peña]

hey can anyone post a reply concerning the whole induction sistem im sort of puzzled in the way it is formed,,the function of the inlet trumpets, r they connected directly to the cilinder head or r they connected to an intake manifold? please go through the process starting from the air filter.

thanx

[cas@bushinternet.com]

as far as i know the valves are connected to the
cylinder head.My ones got oil seals in them.

[Chris Gamlin]

e_peña

The inlet trumpets have a fuel injector in them, and also a butterfly valve, which acts as the throttle (The trumpet/injector/butterfly valve assembly is in place of a carburettor, which would have been used on older engines). Below this is the inlet manifold, which attaches to the cylinder head on the inlet side. At the bottom of the inlet tract is the inlet valve which allows the fuel/air mixture into the cylinder.

Chris

P.S Have a look at these:
http://www.howstuffworks.com/engine.htm
http://www.howstuffworks.com/fuel-injection.htm
http://www.howstuffworks.com/question377.htm
http://www.howstuffworks.com/champ-car1.htm

[woodyracing]

cool

interesting links! i will read them later.

Woody.

[RALFANATOR]

the trumpets that you are talking about are either connected to a carb/set (like a gtv 2.0 afla old something old) or they are connected to a base manifold (inlet) where a injector sits with the nossle (of the injector)sittng at the back of the intake valve which is moved at set times by the camshaft
note :
sometimes you will see different lengths of the trumpets
the reason for that is
longer give the motor more torque
shorter give better high rpm use

PS just for ref F1 motors don't have camshafts (its true)
there valves are air operated

[Chris Gamlin]

Originally posted by RALFANATOR
just for ref F1 motors don't have camshafts (its true)
there valves are air operated

Sorry to disagree, but all F1 engines (with one possible exception) have camshafts. "Pneumatic valves" means that the valve is closed using a pressurised air "spring" rather than by using a conventional steel spring, and does not mean the valve is controlled with air pressure, the camshaft still does this. You could never control valve opening and timing with pneumatics as air is not easily controlled at high pressure, and is very easily compressed, so making it very innacurate, something you do not want with valve movement at 18000rpm!
Only Renault are RUMOURED to not use camshafts in their new wide-angle V10, as they are evidently experimenting with using solenoids (electro-magnets) to electronically open and close the valves. This has lots of potential advantages as you get no direct mechanical losses from turning the camshaft, and you can have much more aggressive valve timing and opening (i.e more power) than is possible using a conventional camshaft to control the valve.
So, apart from possibly Renault, all the rest of the F1 engines currently have conventional camshafts in conjunction with pneumatic valve springs.

Chris

[Ray Bell]

Nobody's mentioned a couple of points...

First, there's no air cleaner...

Then, there are mechanisms that alter the length of the trumpets, so that the aiflow is ideal for the revolutions the engine is turning at that time. Mercedes were experimenting with this for the 1956 GP season, but retired before it began and nobody else has touched it again until very recently.