― Restricting the intake air for exhaust gas recirculation,
― Closing the intake system when the engine is shut off,
― Closing the air path via the charge air cooler while the regeneration of the diesel particulate filter takes place. (High power-Euro 4)
― The intake throttle valve has another function in addition to restricting the intake air for exhaust gas recirculation and closing the intake system when the engine is switched off.