MaxxForce® 15 Engine Training - Program 1

Module 5: Air Management System

Air Induction

This engine uses dual turbochargers.

Both turbos are mounted on the right side of the engine with the high pressure turbo located above the low pressure turbo.

Each turbo has a wastegate in the turbine housing. The wastegate diverts some of the exhaust flow away from the turbine wheel. Each wastegate is operated by a separate pneumatic actuator. If a wastegate is closed, all of the exhaust enters the turbine. If the wastegate is open, some exhaust bypasses the turbine.

“Each turbo has a wastegate in the turbine housing.”

The air control valve is mounted on the right front of the engine. This valve uses regulated air pressure, such as vehicle air, to control the wastegate actuators.

The air control valve contains the following ports: air supply, two vent ports turbocharger 2 wastegate control, turbocharger 1 turbine outlet pressure, and turbocharger 1 wastegate control.

The control valve requires a minimum of

90 psi to operate.

An internal pressure regulator reduces required pressure down to 25 to 45psi for the two wastegate actuators.

“The control valve requires a minimum of 90 psi to operate.”

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