Autonatomy · 07.2 Air Induction, Throttle Control & Boost

Training boundary: All airflow readings, commands, engine cases and pressure-model outputs are fictional or conceptual. The lab does not connect to a vehicle, prescribe boost or throttle settings, or diagnose a real engine. Use current manufacturer procedures and qualified supervision for real testing.

Air Path Explorer

Select eight air-path and control elements to distinguish physical airflow, measurement location and command from actual response.

Four Airflow Journeys

Trace how ambient air, pressure, electronic throttle control and verification interact across different engine designs.

Air / Boost Lab · Pressure Is Not Mass

Use this fictional comparison model to see the difference between manifold absolute pressure, gauge pressure and a simplified air-charge mass proxy. Values are adjustable for learning and are not OEM targets, operating limits, or boost instructions.

Pressure & density modelConstant volume and ideal-gas comparison only

Ambient absolute pressure: 100 kPaIllustrative manifold absolute pressure (MAP): 100 kPaCharge-air temperature: 20 °C

Manifold gauge pressure0 kPa

Pressure conditionAt ambient

Relative gas mass proxy100%

Technician's interpretationCheck pressure reference and sensor location.

The Challenger asks · Pick the supported statement

A fictional engine shows MAP = 120 kPa absolute, ambient = 100 kPa and charge temperature = 20 °C. Which statement is supported?

The mass proxy compares MAP/T to a fixed 100 kPa and 20 °C reference with the same cylinder volume and assumed volumetric efficiency. It excludes engine speed, actual filling, valve timing, humidity, heat transfer, MAF location and transient response; it is not a power, torque, diagnosis or calibration calculator.

Continue with the original labs

Explore the preexisting MAF & MAP Diagnostic Lab, Electronic Throttle Control Lab, and Boost Control Lab. These remain separate learning activities, not replacements for this module.

Airflow & Boost Decisions

Six fictional shop situations. Establish sensor location, operating mode, pressure reference and evidence before suggesting the next action.

07.2 · Knowledge Check

Answer all ten questions to record a browser-local learning score. This score is not an OEM repair result or observed hands-on competence.

Keep learning

Return to Course Player · Review: Engine Management 07.1 · Legacy: MAF & MAP Diagnostics

All original mapped Engine Performance 07.2 resources remain in the Course Player.