Emission controls

The emission control system used in the 911 Carrera includes the oxygen sensor system and the evaporative emission system.

Oxygen sensor. This system provides the fuel injection system with feedback information about combustion efficiency. See Oxygen sensor system, given later.

Evaporative emission controls. This system provides venting for the fuel tank while at the same time trapping the fuel vapors that would otherwise be vented into the atmosphere. The evaporative emission system collects fuel vapors from the fuel tank in a charcoal canister. During certain engine operating conditions, the canister is purged, drawing the fuel vapors into the engine to be burned.

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