PANEL GP-FENDER 4190753 - Caterpillar

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Air inlet and exhaust system (1) Exhaust manifold (2) Aftercooler (3) Engine cylinder (4) Air inlet (5) Turbocharger compressor wheel (6) Turbocharger turbine wheel (7) Exhaust outletClean inlet air from the air cleaners is pulled through air inlet (4) into the turbocharger compressor by turbocharger compressor wheel (5). The rotation of the turbocharger compressor wheel causes the air to compress. The rotation of the turbocharger compressor wheel then forces the air through a tube to aftercooler (2). The aftercooler lowers the temperature of the compressed air before the air goes into the inlet chambers in each cylinder head. This cooled and compressed air fills the inlet chambers in the cylinder heads. Air flows from the inlet chambers in the cylinder heads. Air flow from the inlet chamber into the cylinder is controlled by the inlet valves.There are two inlet valves and two exhaust valves for each cylinder. Refer to "Valve Mechanism". The inlet valves open when the piston moves down on the inlet stroke. The cooled, compressed air is pulled into the cylinder from the inlet chamber.The inlet valves close and the piston starts to move up on the compression stroke. When the piston is near the top of the compression stroke, fuel is injected into the cylinder. The fuel mixes with the air and combustion starts. The force of the combustion pushes the piston downward on the power stroke. When the piston moves upward the piston is on the exhaust stroke. The exhaust valves open and the exhaust gases are pushed through the exhaust port into exhaust manifold (1). After the piston makes the exhaust stroke, the exhaust valves close and the cycle starts again.Exhaust gases from the exhaust manifold go into the turbine side of the turbocharger. The exhaust gases cause turbocharger turbine wheel (6) to turn. The turbine wheel is connected to the shaft that drives turbocharger compressor wheel (5). The exhaust gases exit through exhaust outlet (7) .Air Cleaner And Precleaner
Illustration 2 g00281653
Air cleaner and precleaner (1) Precleaner (2) Air cleaner
Illustration 3 g00281655
Precleaner (typical example) (3) Chamber (4) Vanes (5) Tubes (6) ConeThe air inlet system for this machine is designed for applications with extremely heavy dust. A separate precleaner (1) and air cleaner (2) is used to filter the air for each bank of turbochargers.In order to increase the life of the air cleaner elements, a precleaner is used. The precleaner removes most of the larger particles of dust before the particles reach the elements in the air cleaner. As the air enters the upper part of tubes (5), the air must pass through vanes (4). The vanes cause the air to go in a fast, circular movement. Centrifugal force spins the heavier dust to the outer wall of the tube. The dust falls down the wall of the tube, past cone (6), and into chamber (3). The cleaner air continues through the center of cone (6) to the air cleaner chamber. The filter elements are located in the air cleaner chamber.Chamber (3) is