1
-
Evaporative emission canister purge valve
2
-
Evaporative emission canister to intake manifold vapor line
The evaporative emission fuel vapor management system consists of an evaporative emission canister and an evaporative emission canister purge valve. A combination of plastic tubes and rubber hoses connect the canister to the fuel tank and the purge valve to the intake manifold. The function of the system is to reduce hydrocarbon emissions from the fuel tank.
When the purge valve is closed (normal position), the fuel tank is vented into the canister which absorbs the fuel vapor and prevents the release of hydrocarbons into the atmosphere. When the purge valve is opened, the canister is exposed to the intake manifold vacuum and the fuel vapor deposits are drawn into the manifold where they mix with the incoming air/fuel charge.
The evaporative emission system is controlled by the Powertrain control module (PCM) according to calibrated data tables.
