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13 Cards in this Set
- Front
- Back
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Air Intake Purpose:
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To intake air into the engine, to complete all necessary functions
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Components: 8
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1.Air Cleaner/Spark Arrestor
2.Turbo - a. Compressor Wheel b. Bearing/Shaft c. Turbine Wheel 3. Waste Gate 4.Charge Air Cooler 5.Intake manifold 6.Exhaust Manifold 7.Air Filter Gauge 8.Exhaust Gas Re-Circulation Valve |
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Function:
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The turbocharger supplies air under pressure to the intake manifold. The air enters the air cleaner. Power to drive the turbocharger is extracted from energy in the engine exhaust gas. The expanding gases turn a single stage turbocharger wheel, which drives the impeller, thus pressurizing intake air. The charged air is then cooled by and air to air intake manifold before flowing into the cylinders for improved combustion efficiency. The charge air cooler (CAC) is mounted ahead of the engine coolant radiator.
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Air Filter
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Cleans air by removing foreign matter from the air by filtering, prior to being feed into the engine for combustion. Only dry paper elements are recommended for Detroit Series Engines.
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Air Filter Gauge
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- Measures in inches of Hg
- When the gauge has a high reading in inches of Hg; * indicates that filter is dirty |
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Turbo
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- The turbo is designed to increase the overall power and efficiency of the engine. Power to drive the turbo is extracted from the energy of the engine exhaust. The turbo can be broken down into three basic pieces: a compressor cover, a center housing rotating assembly, and a turbine housing.
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cont. Turbo
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The rotating assembly is supported on two-pressure-lubricated bearings that are retained in the center housing by snap rings. Internal oil passages are drilled in the center of the housing to provide lubrication to the turbine. The oil returns by gravity to the engine oil pan through an external oil line extending from the bottom of the turbocharger center housing to the cylinder block.
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cont. Turbo
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The turbo spins at approximately 80-100K rpm. Always allow the engine ample time to idle before shutting off the engine to allow the turbo bearings to lubricate. Not allowing the bearings to lubricate will lead to premature turbo failure.
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Waste Gate
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- The waste gate is designed to dump excess compressed air into the exhaust side of the turbo.
- This will prevent the engine from getting too much air into the air intake system under different load conditions. |
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Charge Air Cooler
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The charge air cooler is normally mounted ahead of the cooling system radiator. The compressed air leaving the turbo is directed through the CAC before it goes to the air inlet side of the intake manifold. The CAC is used to reduce the temperature of the compressed air leaving the turbocharger before it reaches the intake manifold. This permits a more dense charge of air to be delivered to the engine.
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cont. CAC
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Cooling is accomplished by incoming air flowing past the tubes and fins of the charge air cooler. The compressed intake charge flowing inside the CAC core transfers the heat to the tubes and fins where it is picked up by the incoming outside air.
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Intake manifold
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The charged air is routed to the individual cylinders by an intake manifold the is bolted to the cylinder head. The charged air is forced into the individual cylinder heads.
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Exhaust manifold
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The heated gases then leave the cylinder head via the exhaust manifold to the turbine side of the turbo. These gases then exit through the exhaust on the driver side of the engine.
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