﻿GET_GEVOMechL2_05_01_01_79 - ANIMATION Screen
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You have reached the end of this module!

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In this module, you learned to:

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State the purpose and location of the combustion air system.

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The combustion air system provides sufficient air to the engine during the combustion process and maintains the temperature of that air.

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The components of the combustion air system are located in the engine cab and radiator cab.

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State the purpose and location of the major components of the combustion air system.

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V-Screens: Located on both sides of the radiator cab, the V-screens block large items from entering the combustion air system.

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Plastic Air Cleaner Panels: Located behind the V-screens, the panels provide the primary stage of air filtration for the combustion air system.

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Baggy Air Filters: Located in the combustion air filter compartment, these filters clean the fine particles from the intake air as it comes from the air cleaner panels.

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Turbocharger: Located on the Integrated Front End (IFE) cover of the diesel engine, the turbocharger compresses the air for use by the engine during the combustion process.

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Water-Based Intercooler: Located in the upper section of the radiator cab adjacent to the turbocharger, the water-based intercooler provides the first stage of cooling for the air discharged from the turbocharger.

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Air-Based Intercooler: Located in the upper section of the radiator cab adjacent to the water-based intercooler, the air-based intercooler provides the second stage of cooling for the turbocharged air.

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Exhauster Blower: Located in the radiator cab on the engineer's side (A-side) of the locomotive, the exhauster blower removes the dirty air from the spin cleaner panel bleed air duct, continuously discharging the bleed air and dirt out the top of the unit and into the radiator cab.

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From the radiator cab, the radiator fans pull the air out, discharging the dirty air through the top of the locomotive.

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Winter-Summer Door: Located in the combustion air filter compartment, the winter-summer door prevents ice crystals from clogging the baggy air filters.

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Shutter Control Magnet Valves: Located in the combustion air filter compartment on the helper's side (B-side) of the locomotive, these magnet valves control the air-flow for opening and closing the shutters on the air-based intercooler.

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Turbo Discharge Ducts: These ducts transport the combustion air from the turbocharger to the water-based intercooler.

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Return Air Ducts: These ducts transport the cooled combustion air from the air-based intercooler to the engine intake manifold.

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Intermediate Ducts: These ducts transport the combustion air from the water-based intercooler to the air-based intercooler.

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State the purpose and location of the instrumentation devices of the combustion air system.

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Manifold Air Temperature (MAT) Sensor: Located at the end of the engine’s intake air manifold, the MAT sensor measures the manifold air temperature and provides the information to the ECU.

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Ambient True Temperature (ATT) Sensor: Located in the combustion air filter compartment wall, the ATT sensor measures the temperature of the air entering the turbocharger and provides the information to the ECU.

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Pre-Turbine Right Temperature (PTRT) and Pre-Turbine Left Temperature (PTLT) Sensors: Located in each exhaust manifold at the connection points to the turbocharger, these sensors measure the temperature of the exhaust air going into the turbocharger and provide the information to the ECU.

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Turbocharger Right Speed (TRS) Sensor: Located in the turbocharger, the TRS sensor measures the rotational speed of the turbocharger and provides the information to the ECU.

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Manifold Air Pressure (MAP) Sensor: Located at the end of the engine’s intake air manifold, the MAP sensor measures the air pressure in the intake manifold and provides the information to the ECU.

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Barometric Air Pressure (BAP) Sensor: Located on the wall of Control Area 4 in the Auxiliary Cab, the BAP sensor measures the atmospheric pressure and provides the information to the ECU.

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Engine Air Filter Pressure (EAFP) Sensor: Located in the combustion air filter compartment just above the fuel filter tanks, the EAFP sensor measures the pressure of the air at the outlet of the filters and before entering the turbocharger and provides the information to the ECU.
