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    • 2. 发明授权
    • Fuel evaporation control system
    • 燃油蒸发控制系统
    • US4127097A
    • 1978-11-28
    • US801797
    • 1977-05-31
    • Masatami Takimoto
    • Masatami Takimoto
    • F02M25/08F02M69/00
    • F02M25/0836F02M2025/0845
    • A fuel evaporation control, or vapor recovery system including: a charcoal canister housing therein activated charcoal adapted to adsorb gasoline vapor from a fuel tank; a purge port leading to a canister and opening into an intake passage in such a position that a throttle valve for the carburetor may assume an upstream position and a downstream position relative to the purge port, depending on its open positions; and a valve for controlling communication between the charcoal canister and a portion of the intake manifold, which is downstream from the throttle valve, in response to the operational condition of the engine. This fuel evaporation control system allows the vapor from the fuel tank to pass into the engine during engine deceleration or when the engine is loaded over a given load level. This system, however, interrupts the supply of gasoline vapor to the engine, during engine idling or when the engine is lightly loaded. Because of the supply of gasoline vapor during engine deceleration, the charcoal canister may provide capacity enough to retain the gasoline vapor when the engine is loaded over a given load level so that the size of the canister need not be increased and the cleaning time of gasoline vapor with air through the canister may be shortened.
    • 一种燃料蒸发控制或蒸汽回收系统,包括:其中容纳有活性炭的木炭罐,其适于吸附来自燃料箱的汽油蒸气; 吹扫口,其通向罐并且进入进气通道,使得化油器的节流阀根据其打开位置可相对于吹扫口呈现上游位置和下游位置; 以及阀,用于响应于发动机的操作状况,控制活塞罐与节流阀下游的进气歧管的一部分之间的连通。 该燃料蒸发控制系统允许来自燃料箱的蒸汽在发动机减速期间或当发动机在给定的负载水平下被装载时进入发动​​机。 然而,该系统在发动机怠速期间或发动机轻载时中断向发动机供应汽油蒸气。 由于在发动机减速期间供应汽油蒸汽,所以在发动机在给定的负荷水平下装载时,炭罐可以提供足够的能力来保持汽油蒸汽,使得罐的尺寸不需要增加,并且汽油的清洁时间 可以缩短通过罐的空气蒸汽。