HYDROCARBON EMISSION CONTROL SYSTEM

The invention relates to a hydrocarbon emission control system. An exemplary system for monitoring and controlling evaporative emissions for a vehicle includes a first fuel vapor adsorption canister,a second fuel vapor adsorption canister, a first passage from the fuel supply to the first canister, a second passage from the first canister to the canister, the second passage including a first valve selectively actuatable from a first position to a second position, a third passage from the first and second canisters for venting the first and second canisters, a fourth passage connecting the second canister to the third passage, and a controller electrically connected to the first valve. Fuel vapor is routed to the first canister when a first condition is not satisfied and fuel vapor is routed to the second canister when the first condition is satisfied. 本发明题为"烃排放控制系统"。本发明提供了一种用于监测和控制车辆的蒸发排放物的示例性系统，所述系统包括：第一燃料蒸气吸附罐；第二燃料蒸气吸附罐；从燃料供应源到所述第一罐的第一通道；从所述第一罐到罐的第二通道，所述第二通道包括能够选择性地从第一位置致动到第二位置的第一阀门；来自第一罐和第二罐的用于排出所述第一罐和所述第二