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Contents Section: Exhaust System, Emission Controls (3.2l v6 4v - Bhe) All sections

Function Audi TT 8N рестайлинг

Exhaust System, Emission Controls (3.2l v6 4v - Bhe) ~121 words

Function

  1. During the cold start phase (coolant temperature at + 15...+ 35° C) the secondary air system blows air behind the exhaust valves for approx. 65 seconds. This produces an oxygen-rich exhaust gas, causes afterburning and reduces the heating-up phase of the catalytic converter.
  2. In addition, 20 seconds after each following engine start (until coolant temperature reaches 85 ° C), the secondary air system switches on for 5 seconds when at idling speed and is checked by the self-diagnosis.
  3. The Secondary Air Injection (AIR) pump motor -V101- is actuated via the Motronic Engine Control Module (ECM) -J220-, the Secondary Air Injection (AIR) pump relay -J299-, the Secondary Air Injection (AIR) solenoid valve -N112-, the change-over valve and the combination valve.