Autonatomy · 06.4 Engine Airflow & Mechanical Breathing

Training boundary: The airflow paths and pressure/temperature lab are original conceptual models, not vehicle-specific service diagrams, intake/boost specifications, power predictions or authorization to test a running engine. Use the correct OEM procedure and qualified supervision for actual work.

Intake & Exhaust Component Explorer

Explore eight airflow components or groups and how their purpose differs with engine architecture.

Four Airflow & Diagnostic Journeys

Compare a naturally aspirated path, a generalized turbocharged path, an intake restriction, and an unintended opening.

Charge Comparison Lab · A Simplified Gas Model

Explore how absolute intake pressure and charge temperature affect a relative gas-mass index in a fixed reference volume. The ideal-gas relationship is mass ∝ absolute pressure ÷ absolute temperature when gas composition, volume and assumed filling factor stay fixed.

Illustrative intake pressure: 100 kPa absolute

Illustrative charge temperature: 300 K (26.9 °C)

Reference state: 100 kPa absolute and 300 K. Fixed reference volume and assumed filling factor; real VE, control response, gas composition and temperature distribution are not calculated. This is not a boost target, intake specification, torque prediction or diagnostic pass/fail threshold.

The Challenger asks

At the same absolute pressure and fixed reference volume, why does the idealized relative mass index fall as charge temperature rises?

Airflow & Mechanical Breathing Challenges

Six fictional shop cases teach evidence-led diagnosis rather than guessing at a sensor, turbocharger or mechanical component.

06.4 · Knowledge Check

Answer all ten questions to record a browser-local knowledge score. The result is not a measured engine diagnosis or observed hands-on assessment.

Keep learning

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