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What spools the turbo in a diesel truck?

The turbocharger in a diesel truck isn't spooled by anything in the traditional sense. It's actually spun by the exhaust gases. Here's how it works:

1. Exhaust gases: When the engine runs, exhaust gases are created and expelled from the engine.

2. Turbocharger housing: These gases flow through the turbocharger housing, which contains a turbine wheel.

3. Turbine spins: The hot, high-pressure exhaust gases strike the turbine blades, causing them to spin rapidly.

4. Connected shaft: The turbine is connected to a compressor wheel by a shaft.

5. Compressor spins: As the turbine spins, it also rotates the compressor wheel.

6. Air compression: The compressor wheel draws in fresh air and compresses it, forcing it into the engine's intake manifold.

This increased air pressure leads to more efficient combustion, resulting in:

* More power: The engine can burn more fuel, producing more power.

* Better fuel economy: The engine can burn less fuel to produce the same power.

* Reduced emissions: The engine can burn fuel more efficiently, reducing emissions.

Essentially, the turbocharger is a self-powered device that uses the waste energy from exhaust gases to increase the engine's power and efficiency.