Hyundai Elantra HD: Canister Close Valve (CCV). Description and Operation
Function And Operation Principle
The evaporative emission control system prevents hydrocarbon (HC) vapors
from the fuel tank from escaping into the atmosphere where they could form photochemical
smog. Gasoline vapors are collected in the charcoal canister. The Canister Close
Valve (CCV) closes off the air inlet into the canister for leak detection of
the evaporative emission system. The CCV also prevents fuel vapors from escaping
from the canister. When the engine purges the HC vapors from the canister, the
clean air comes into the canister through the canister air-filter and the CCV.
