Evaporative Emission (Evap) Control Diagram - Honda 2002 Accord Manual

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Fuel and Emissions Systems

System Descriptions (cont'd)

Evaporative Emission (EVAP) Control Diagram

The EVAP controls minimize the a m o u n t of fuel vapor escaping to the atmosphere. Vapor f r o m the fuel tank is

temporarily stored in the EVAP canister until it can be purged f r o m the canister into the engine and burned.

• The EVAP canister is purged by d r a w i n g fresh air t h r o u g h it and into a port on the intake manifold. The purging

vacuum is controlled by the EVAP canister purge valve, w h i c h is open whenever engine coolant temperature is

above 167°F (75°C).

• W h e n vapor pressure in the fuel tank is higher than the set value of the EVAP t w o w a y valve, the valve opens and

regulates the f l o w of fuel vapor t o the EVAP control canister.

• During refueling, the fuel tank vapor control valve opens w i t h the pressure in the fuel tank, and feeds the fuel vapor

to the EVAP canister.

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