| 摘要 |
A canister purge flow regulator for regulating the purging of a fuel vapor collection canister to the engine. The purge flow regulator has in the purge flow path, two parallel branch paths, and an associated valve for each branch path. The two valves are operatively related for motion in unison by an actuating mechanism. When the two valves are closed, manifold vacuum is applied in opposite senses, thereby canceling the effect of variations in manifold vacuum on opening of the purge flow regulator. The actuating mechanism senses the differential pressure drop across an orifice in the flow path to automatically adjust the valves to maintain the purge flow commanded by an electric signal input to a solenoid.
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