Air under pressure

A turbocharger connects exhaust energy to intake compression. Does that mean the two gas streams mix?

Exhaust gas drives a turbine. A shared shaft turns a compressor that supplies compressed intake air. The intake and exhaust streams stay separate. A turbocharger can increase the air mass available for combustion.

Compression heats air. A charge-air cooler removes some of that heat before the air reaches the cylinders. A wastegate can bypass exhaust around the turbine to help control boost.

Single turbo describes a count; twin-scroll describes separated turbine inlet passages. Twin turbo means two units. Variable geometry uses movable vanes to regulate the turbine inlet. These descriptions can overlap; TwinPower Turbo branding alone does not establish turbo count.

1. 1
   Exhaust energy

   Hot exhaust flows through the turbine housing.

2. 2
   Shared shaft

   The turbine and compressor rotate together; the gas paths remain separate.

3. 3
   Compressed air

   The compressor increases intake pressure and also raises air temperature.

4. 4
   Charge cooling

   The charge-air cooler transfers heat away before the air reaches the engine.

Think it through

Draw two routes: exhaust manifold → turbine → exhaust; air filter → compressor → charge cooler → engine. What connects the routes without joining their airflow?

Show the reasoning

The shaft transfers mechanical energy from turbine to compressor. The compressor acts on fresh intake air; exhaust continues through the exhaust path.