Name: Turbos: How They Work | Science Garage
Uploaded: 2018-11-30T16:25:05.000Z
Duration: 7 min 16 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

you have to know the basics
of how an engine works.

Think of an engine like a very large pump.

compresses and combusts it before pumping

out all the goodies that
people like to get angry about.

Getting fuel is usually as
simple as turning the tap up,

A cylinder is limited in
how much air it can breath,

There was no replacement for displacement.

Then in 1905, a Swiss
engineer named Alfred Buchi,

came up with a replacement
for displacement,

when he used the exhaust
gasses of an engine,

More air, meant more fuel
could burn, and get more boom.

Turbos were quickly adopted
by the aeronautical industry.

When you're 20,000 feet up, the
air is almost half as dense,

and engines would lose as
much as half of their power.

- [Narrator] 400 horsepower at sea level.

But moving up to 14,000
feet, it drops to 265.

- A turbo restored air
pressure in the engine,

When a turbo is used to
exceed that pressure,

As your engine expels exhaust
gasses, they enter in here.

The exhaust air gets
piped over this turbine,

and it gets shot out the back of your car.

The turbine is connected to this impeller,

As it spins, it sucks in a
ton of air through this inlet,

and shoots it out this outlet
into your intake manifold.

The air is now more dense,
so it has more oxygen,

To keep that charged air from
going back into the turbo,

by letting the air go
back into the atmosphere.

blazing exhaust gasses passing through it,

as the hot side of a
turbo, often looks rusty.

That's because the extreme
heat acts as a catalyst,

causing the metal to oxidize more quickly.

you push the molecules closer
together, and create friction,

they move around everywhere,
and then they increase

the speed of the air, and
that makes them lose density.

Well if we cool all of this
hot turbo charged air off,

sit closer together and
become even more dense.

The most popular and simple
way, is with an intercooler.

An intercooler sits between
the turbo and the engine.

The air passes through
channels with cooling fins.

The cool air from outside
passes over the fins,

absorbs the heat, and
reduces the temperature.

And if your Suburu's
got a hole in the hood,

don't worry, that's for your intercooler.

So, now we know that a turbo
charger is an air compressor.

why not just get the
biggest turbo you can find?

If a turbo's too big it takes a long time

for the exhaust to get
it spinning fast enough,

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Turbos: How They Work | Science Garage

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achieve

atmosphere

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