How does an engine “suck” in air? Like during the intake stroke it goes down which creates a low pressure area and the air rushes in. But how does all that work? How does the piston going down allow air to be pulled in? LOL please explain it as simple TY!
In: Engineering
Technically it doesn’t suck, it creates a low pressure place where air rushes in from the outside.
Like when you “suck” with a straw, you seal your mouth and you are putting in work to make the internal cavity bigger, in turn the pressure in your mouth lowers while the outside stays the same, this pressure difference is equalized by the larger pressure air flowing inside your mouth. It just happens that there is a liquid between the air outside so it goes in first.
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Back to the engine. The first engines that had one cylinder had a huge flywheel that doe momentium it helped the engine “suck” when not stroking. The ignition phase made more energy then needed to drive the vehicle an drive the flywheel.
With multi cylinder engines, usually there is always a cylinder that ignites, helping the other cylinders do the exhausting and sucking air in.
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