YOKE 7K0395 - Caterpillar

Illustration 1 g01319918
Typical example
(1) Exhaust manifold
(2) Exhaust outlet
(3) Turbocharger turbine wheel
(4) Turbocharger compressor wheel
(5) Air inlet
(6) Air intake manifold Air from the air filters is pulled through air inlet (5) into the turbocharger compressor by turbocharger compressor wheel (4). The rotation of the turbocharger compressor wheel forces the compressed air through the air intake manifold (6) and into the inlet chambers for each cylinder head. This compressed air fills the inlet chambers in the cylinder heads. Air flow from the inlet chamber into the cylinder heads is controlled by the engine's intake valves.There are two intake valves and two exhaust valves for each cylinder. Refer to Systems Operation/Testing and Adjusting, "Valve Mechanism". The intake valves open when the piston moves down on the intake stroke. The cooled, compressed air is pulled into the cylinder from the inlet chamber. The intake 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 begins. The force that is generated by combustion pushes the piston downward on the power stroke. When the piston moves upward again, 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 exhaust stroke is complete, the exhaust valves close and the cycle starts again.Exhaust gases from exhaust manifold (1) enter the turbine side of the turbocharger. The exhaust gases cause turbine wheel (3) to turn. The turbine wheel is connected to the shaft that drives the turbocharger's compressor wheel. The exhaust gases exit through exhaust outlet (2).