Outside automospheric pressure IS a vacuum, which is sucking, we're both right
Really, a vacuum is defined by a lack of gas particles, and that lack of gas particles of course causes a difference in pressure where outside gas particles will try and fill the vacuum area. Of course, this can never happen because the engine is always running at at least 600 rpms- so what happens is an atmospheric sucking trend- like a very very small low pressure system..
Gas scavenging- the same gas scavenging that causes NA engines to have less torque when the exhaust pipe is too big- causes these gas particles that are being sucked up to temporarily "hold on" to particles near them- IE, water. Water has this property too- but 10fold. This is why when you put water in a beaker, it will seem to "climb the sides" and if you touch your finger to a pool of water and lift it out, you'll have more than one layer of water molecules on your finger.
Thats how you can suck water off a desk through a straw without actually touching the water.
Of course, the amount of vacuum is totally dependent on the rpms you are at- and therefore the speed- but if water gets on the filter or in the Intake
pipe itself, it will be sucked in.
A bypase valve (its not really a valve.. just a stupid piece of foam
) is a secondary place for air to be sucked into the CAI
. Air is still easier to move through gas scavenging than water is (it weighs less) so if uhm.. to make this personified.. if the Intake
has a choice, it will suck in air through the bypass valve, rather than a mildly wet Intake
You're not wrong, but steps 1 and 2 of your statement are almost the same- and the 2nd step is always caused by the first step. If there were no vacuum, there'd be no atmospheric pressure difference. This is why some cars after doing engine work dont run anymore- someone messed up and there's a hose leak somewhere
As for sucking... atmospheric pressure changes causes it. It's not THAT scientific, but watch the movie Aliens where she blasts the queen alien outside of the ship when she opens the airlock
think of space like the combustion chamber, the airlock as the CAI
, the interior of the spaceship as the outside air around the car. And the alien queen as H20. Ripley causes hydrolock when she opens that airlock. Whoever owns that space engine is gonna be pissed off
Of course, the pressure difference between the infinity of space and an enclosed spaceship on the other side are WAY different from the pressure difference of an enclosed vacuum and a normal sea level atmospheric mole pressure. But you get the idea