Secondary air system

Low-emission strategies (Euro 6 in Europe and SULEV /PZEV in the USA)
  • reduction of cold-start emissions
  • rapid heating of the exhaust aftertreatment system
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EA211 – Secondary air pump (SAP)

Pierburg side-channel SAP
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Setup and mode of operation

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Jetta Hybrid base engine

The SAP normally extracts the air from the engine air filter via a line or, alternatively, its own secondary air filter. The air is pumped to the secondary air valve.

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