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Ducati 1199 Superquadro breathing
To achieve this, Ducati introduced a secondary air system that completes the oxidisation of unburned hydrocarbons and effectively reduces HC and CO levels.
The system is activated when the engine ECU recognises specific conditions in the engine's operation via the lambda and throttle opening sensors. It then opens a valve enabling a flow of clean air from the main airbox to a reed valve situated in each cylinder head, which enables one-way flow into an air gallery exiting into the exhaust port close to the exhaust valve. Entering the hottest point of the exhaust gasses, the fresh charge of air enhances the burn environment, eliminating any unburned fuel that escapes during the exhaust cycle under certain conditions.
Source: Ducati
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