专利名称：Evaporated fuel treatment device of an
engine
发明人：Akinori Osanai申请号：US08/908336申请日：19970807公开号：US05944003A公开日：19990831
摘要：An evaporated fuel treatment device comprising a purge control valve forcontrolling an amount of fuel vapor fed into the intake passage from a charcoal canister.The drive pulse of the purge control valve is controlled by a duty ratio. When the engineis idling, if the air-fuel ratio becomes rich, the speed of increase of the duty ratio of thedrive pulse of the purge control valve is restricted to less than a predetermined speed.
申请人：TOYOTA JIDOSHA KABUSHIKI KAISHA
代理机构：Kenyon & Kenyon
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