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5 Evaporative emissions
control (EVAP) system 2
General description
1 This system is fitted to minimise the escape
of unburned hydrocarbons into the
atmosphere. Fuel evaporative emissions
control systems are limited on vehicles
meeting 15.04 regulations; carburettor float
chambers are vented internally, whilst fuel
tanks vent to atmosphere through a combined
roll-over/anti-trickle-fill valve. On vehicles
meeting the more stringent emissions
regulations, the fuel tank filler