What path does intake air take in a turbocharged engine according to this diagram?

Ambient air enters at the Ambient Air Inlet, is compressed by the Compressor Wheel, flows as Compressed Air Flow through the Charge Air Cooler (with a BOV attached), and then into the Engine Cylinder.

What is the exhaust flow path shown in the diagram?

Exhaust leaves the Engine Cylinder through the Exhaust Manifold / header, travels up the Uppipe to the Turbine Wheel of the turbocharger, then exits as Exhaust Gas Discharge through the Downpipe, Midpipe, and Muffler.

Which section of the exhaust is labeled 'Cat-back'?

The Cat-back is marked as the span from roughly the downpipe/midpipe area rearward through the muffler at the bottom of the diagram.

How is the turbocharger lubricated according to the diagram?

The diagram labels a Turbocharger Oil Inlet at the top of the turbo center housing and an Oil Outlet at the bottom, showing where oil enters and exits the turbocharger.

Where is the BOV located in this turbo system?

The BOV is shown mounted on the charge piping at the Charge Air Cooler (intercooler), in the compressed air flow path before the engine.

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Turbo System Piping Diagram - Turbocharger Airflow, Intercooler & Exhaust Layout

Turbocharger and cat-back exhaust flow schematic with charge air cooler and intercooler

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Schematic of a turbocharged engine air and exhaust flow path including compressor, charge air cooler, turbine and cat-back exhaust.

AI caption April 2007 · Photo 5 of 7

This document is a color schematic diagram illustrating the airflow and exhaust flow path through a generic turbocharged engine system. It shows the complete circuit: ambient air enters at the Ambient Air Inlet, is compressed by the Compressor Wheel of the turbocharger, flows as Compressed Air Flow (shown in blue) through the Charge Air Cooler (intercooler) with an attached BOV (blow-off valve), and then enters the Engine Cylinder. Exhaust gases (shown in red) exit through the Exhaust Manifold / header and travel through the Uppipe to spin the Turbine Wheel of the turbocharger, which drives the compressor. The Exhaust Gas Discharge then flows through the Downpipe, Midpipe, and Muffler, with the section from the downpipe rearward labeled as the Cat-back. The diagram also labels the Turbocharger Oil Inlet and Oil Outlet, indicating the lubrication connections for the turbo's bearing housing. Color coding distinguishes cool intake air (blue), hot exhaust (red), and intermediate exhaust sections (magenta/yellow for uppipe, downpipe and midpipe). A reader can learn the names and order of all major components in a turbo piping system and how intake and exhaust flows relate to the turbocharger. No vehicle make, model, year, or part numbers are stated.

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Frequently asked questions

What path does intake air take in a turbocharged engine according to this diagram?: Ambient air enters at the Ambient Air Inlet, is compressed by the Compressor Wheel, flows as Compressed Air Flow through the Charge Air Cooler (with a BOV attached), and then into the Engine Cylinder.
What is the exhaust flow path shown in the diagram?: Exhaust leaves the Engine Cylinder through the Exhaust Manifold / header, travels up the Uppipe to the Turbine Wheel of the turbocharger, then exits as Exhaust Gas Discharge through the Downpipe, Midpipe, and Muffler.
Which section of the exhaust is labeled 'Cat-back'?: The Cat-back is marked as the span from roughly the downpipe/midpipe area rearward through the muffler at the bottom of the diagram.
How is the turbocharger lubricated according to the diagram?: The diagram labels a Turbocharger Oil Inlet at the top of the turbo center housing and an Oil Outlet at the bottom, showing where oil enters and exits the turbocharger.
Where is the BOV located in this turbo system?: The BOV is shown mounted on the charge piping at the Charge Air Cooler (intercooler), in the compressed air flow path before the engine.