2074 F28 Series Air Handling System
2074 F28 Series Air Handling System
2074 F28 Series Air Handling System
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Upon completion of this course the technician will be capable of:
Describing the air flow through the F2.8 engine's air handling system and
Identifying the F2.8 engine air handling system components.
Scene Number: 2074 1030 Scene Title Turbocharger
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Cummins F2.8 series engines feature a wastegate turbocharger. The turbocharger’s
wastegate allows a more efficient turbocharger to be installed on a smaller engine to create
higher boost pressures at low RPMs to increase low-end torque, but reducing excessive
boost pressure at higher engine RPMs to protect the engine.
Different mounting angles are available to allow the engines to adapt to more vehicle
applications.
Scene Number: 2074 1040 Scene Title Compressor
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A cast aluminum compressor wheel is featured on F2.8 series engine turbochargers. The
compressor wheel is shaft driven by the turbine.
Care should be exercised whenever handling the turbocharger or whenever the compressor
wheel is exposed. The compressor housing on F2.8 series engines cannot be rotated.
Scene Number: Scene Title Turbine
2074 1050
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A cast iron turbine is featured on F2.8 series engines. The turbocharger scavenges wasted
thermal energy from the engine in the form of hot exhaust gases. The exhaust gases force the
rotation of the turbine, which drives the cross shaft that rotates the compressor wheel and
compresses additional intake air for improved combustion.
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The exhaust manifold is a one-piece design.
ISF2.8 E engines will have an additional port on the exhaust manifold to supply exhaust gas
to the EGR cooler.
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The air intake connection directs air to the air intake manifold.
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The following section will cover the air flow through the F2.8 liter engine.
Scene Number: Scene Title Turbocharger Air Flow
2074 1240
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The intake air is drawn through the air cleaner into the compressor side of the turbocharger.
Scene Number: Scene Title Charge Air Cooler Air Flow
2074 1250
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After leaving the turbocharger, the hot intake air flows to the charge air cooler through
charge air tubing.
Once inside the charge air cooler, heat from the intake air is transferred to the outside air
flowing around the fins of the cooler, decreasing the temperature of the intake air.
The cooled intake air leaves the charge air cooler and enters the air inlet connection through
charge air tubing.
Scene Number: Scene Title Intake Manifold Air Flow
2074 1260
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Air flow from the air inlet connection travels through the intake manifold and continues
through the inlet ports creating a swirl pattern into the combustion chambers.
Scene Number: 2074 1270 Scene Title Exhaust Manifold Air Flow
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After combustion, the exhaust gases flow from the combustion chambers to the opposite
side of the cylinder head and through the exhaust manifold to the turbo housing of the
turbocharger.
From here the gases exit the exhaust system.
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When the EGR valve opens the exhaust gas travels to the EGR cooler, where the exhaust gas
is cooled by coolant traveling perpendicular to the exhaust gas.
Scene Number: 2074 1300 Scene Title Intake Manifold with EGR Air Flow
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Once cooled, the exhaust travels to the intake manifold through EGR tubing where it is
mixed with fresh intake air.
Scene Number: Scene Title Conclusion
2074 4000
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Scene Number: Scene Title Assessment
2074 4010
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True or False: During engine cranking the ECM will de-energize the intake air heater relay
to allow more amperage for engine cranking.
Scene Number: 2074 4020 Scene Title Assessment
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The EGR control valve is an intelligent device that communicates with the ECM via which
data link?
Scene Number: Scene Title Assessment
2074 4030
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How many pieces make up the exhaust manifold?
Scene Number: 2074 4040 Scene Title Assessment
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How many pieces make up the air intake manifold for this engine?