Diesel Data: Automotive Repair

Fuel And Emissions System Description - Intake Air System




Fuel and Emissions System Description - Intake Air System

Intake Air System

The system supplies air for engine needs.

Intake Air Bypass Control Thermal Valve

When the engine is cold, the intake air bypass control thermal valve sends air to the injector.

The amount of air is regulated by engine coolant temperature. Once the engine is hot, the intake air bypass control thermal valve closes, stopping air to the injector.