Series 40E

Section 6.1 Air Induction System

Section 6.1
Air Induction System

The intake system consists of those components that flow filtered air to the engine cylinders. See Figure "Air Induction and Exhaust Systems" .‪

The intake system consists of an air cleaner, air-to-air cooler, the compressor side of the turbocharger, valve cover/intake manifold and intake valves. During start up, the air is forced through the air cleaner by the atmospheric pressure.‪

Click to see this graphic in a separate window

 1. Intake Manifold Pressure Port‪

 8. Wastegate‪

 2. Turbine Wheel‪

 9. Crossover Pipe‪

 3. Engine Exhaust Manifold‪

10. Charge Air Cooler‪

 4. Exhaust Valve‪

11. Compressor Wheel‪

 5. Intake Valve‪

12. Restriction Gage / Indicator Port‪

 6. Engine Intake Manifold Valve Cover‪

13. Air Cleaner‪

 7. Turbocharger‪

Figure 1. Air Induction and Exhaust Systems

wheel faster causing the compressor impeller to turn faster and supply more air (greater boost) to the intake manifold. Conversely, with light engine load, the flow of exhaust gases decreases and less air is pumped into the intake manifold.‪

The air is cooled by a charge air cooler prior to entering the intake manifold. Air then flows into the combustion chamber where the proper amount of fuel is injected causing combustion to occur. Exhaust gases leave the cylinders through exhaust ports and the exhaust manifold. The turbocharger compressor side is part of the intake system and the turbine side is part of the exhaust system. See Figure "Air Flow Through Air Induction System " .‪

Note: Effective January 2000, all Series 40E engines rated at 250 horsepower and above use an orange-colored, fiberglass-reinforced, formed silicone rubber air intake manifold elbow. This replaces the jointed, black rubber intake manifold elbow previously used.

Click to see this graphic in a separate window

1. Air Intake Manifold Elbow‪

4. Charge Cooler Air Inlet Pipe‪

2. Charge Cooler Air Outlet Pipe‪

5. Turbocharger‪

3. Charge Cooler (Air-to-Air Intercooler)‪

Figure 2. Air Flow Through Air Induction System

Series 40E Service Manual - 6SE410
Generated on 10-13-2008

Leave a Reply

Your email address will not be published. Required fields are marked *