Evaporative Emission Control System - Hev: Overview Hyundai Sonata VI

DESCRIPTION

The Evaporative Emission Control System prevents fuel vapor stored in fuel tank from vaporizing into the atmosphere. When the fuel evaporates in the fuel tank, the vapor passes through vent hoses or tubes to a canister filled with charcoal.

The canister temporarily holds the vapor in the charcoal. The ECM will control the system in order to draw the gathered vapor into the combustion chambers during certain operating conditions. Engine manifold vacuum is used to draw the vapor into intake manifold.

Scheme 21

A ratchet tightening device on the threaded fuel filler cap reduces the chances of incorrect installation, which seals the fuel filler. After the gasket on the fuel filler cap and the filler neck flange contact each other, the ratchet produces a loud clicking noise indicating the seal has been set.

Scheme 22

Scheme 23

Scheme 24

1. Lift the vehicle with a jack.
2. Disconnect the ventilation hose (A).
3. Remove the fuel tank air filter after removing the installation bolt (B).
4. Install a new fuel tank air filter in accordance with the reverse order.