Description And Operation: Overview

WARNING: This page is about a different car, the 2015 Land Rover LR2, 2014 Land Rover LR2, and 2013 Land Rover LR2. However, it is still accessible from the selected car via links, so may be relevant.

The EVAP (evaporative emission) control system reduces the level of hydrocarbons released into the atmosphere by fuel vapor venting from the fuel tank. The system comprises a charcoal canister, a purge valve and interconnecting pipes and hoses. The vent pipes are connected to the system components using quick release connectors.

Fuel vapor is generated in the fuel tank and the amount of fuel vapor increases as the fuel temperature increases. Fuel vapor can flow freely to atmosphere or where fitted, to the charcoal canister via the tank vent system. The venting system comprises of a liquid vapor separator in the top of the tank which is connected via hoses and the fuel pump module to the charcoal canister. The vent hose from the fuel pump module allows hydrocarbon fuel vapor to flow to the charcoal canister.

The vapor from the fuel tank is passed from the vapor separator into the charcoal canister where it is absorbed and stored by the charcoal. Because there is a limit to the amount of vapor the canister can contain, the fuel vapor is purged from the canister when the engine is running and burned in the engine during the combustion cycle.