Cartridge K03 53039700136 06J145701P Audi TFSI

Center-Housing. 

The turbine-compressor common shaft is supported by a bearing system in the center housing (bearing housing) located between the compressor and turbine (Figure 2). The shaft wheel assembly (SWA) refers to the shaft with the compressor and turbine wheels attached, i.e., the rotating assembly. The center housing rotating assembly (CHRA) refers to SWA installed in the center-housing but without the compressor and turbine housings. The center housing is commonly cast from gray cast iron but aluminum can also be used in some applications. Seals help keep oil from passing through to the compressor and turbine. Turbochargers for high exhaust gas temperature applications, such a spark ignition engines, can also incorporate cooling passages in the center housing.

Figure 2.

Sectional view of turbocharger
Sectional view of an exhaust gas turbocharger for a gasoline engine showing compressor wheel (left) and turbine wheel (right). The bearing system consists of a thrust bearing and two fully floating journal bearings. Note the cooling passages.

(Source: BorgWarner)
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