Unterstützung

Turbocharger A turbocharger is a small radial fan pump driven by the energy of the exhaust gases of an engine. The purpose of a turbocharger is to compress the air flowing into the engine. It lets the engine squeeze more air into a cylinder, and more air means that more fuel can be added. Therefore, you get more power from each explosion in each cylinder. Turbine To put it simply, a turbocharger comprises of a turbine and a compressor connected by a common shaft supported on a bearing system. The turbocharger is bolted to the exhaust manifold of the engine. It uses the exhaust flow from the engine to spin a turbine, which works like a gas turbine engine. The more exhaust that goes through the blades, the faster they spin. Compressor On the other end of the shaft that the turbine is attached to, the compressor pumps air into the cylinders. Compressor consists of two sections, the impeller or compressor wheel and the compressor housing. The compressor wheel is connected to the turbine by a forged steel shaft. As the compressor wheel spins, air is drawn in and is compressed as the blades spin at a high velocity. The compressor is a type of centrifugal pump — it draws air in at the center of its blades and flings it outward as it spins. Bearing The turbocharger bearing system is lubricated by oil from the engine. The oil is fed under pressure into the bearing housing, through to the journal bearings and thrust system. The oil also acts as a coolant taking away heat generated by the turbine. Wastegate Many turbochargers use a basic wastegate, which allows smaller turbochargers to reduce turbo lag. A wastegate regulates the exhaust gas flow that enters the exhaust-side driving turbine and therefore the

Causes of turbocharge exhaust wheel damage Image C is a damaged exhaust wheel, the red circle indicates the damaged area. Image A is a turbocharger section cut out. Image B is a section cut out for exhaust side of a turbocharger. In image B, yellow circle indicates the part where most of the turbocharger dialed from. Many claim that is the caused by bad bearing. But it is not always true. The black circle shows a smaller gap between the impeller and the housing. The damages caused by bearing failure would cause the black area to get hit first. On contrary, damages found only on yellow areas will indicated the cause came from objects shot out from engine.