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    • 1. 发明授权
    • Method for controlling the air-fuel ratio in a carburetor of an internal
combustion engine
    • 用于控制内燃机的化油器中的空燃比的方法
    • US4463724A
    • 1984-08-07
    • US366989
    • 1982-04-09
    • Kastuyoshi FukayaAkira TokudaHitoshi Hirano
    • Kastuyoshi FukayaAkira TokudaHitoshi Hirano
    • F02D33/00F02D41/14F02M7/24F02M7/20
    • F02D33/00F02D41/1484F02M7/24
    • A method for controlling the air-fuel ratio in a carburetor which prevents fuel from flowing into an air bleed passage at nearly fully closed position of the tapered needle valve fitted with the air bleed passage by controlling the step motor connected to the needle valve so as to maintain the minimum amount of bleed air at a constant level. In another aspect, at nearly fully closed position of the needle valve, this invention is effective to prevent fuel from flowing into the air bleed passage by continously driving the step motor in a direction of its fully closed position to axially vibrate the needle valve so that the minimum amount of bleed air may be maintained at a constant level. In a further aspect, at nearly fully closed position of the needle valve, this invention is effective to determine the relation between the amount of stroke of the needle valve and the amount of bleed air to flat characteristics by continuously driving the step motor in a direction of the fully closed position of the needle valve so that the minimum amount of bleed air may be maintained at such a level that the fuel is prevented from flowing into the air bleed passage.
    • 一种用于控制化油器中的空燃比的方法,其通过控制连接到针阀的步进电机来防止燃料流入装配有排气通道的锥形针阀的几乎完全关闭位置的排气通道,从而 以将最小量的排气保持在恒定的水平。 在另一方面,在针阀的几乎完全关闭的位置,本发明通过在其完全关闭位置的方向上连续驱动步进马达来轴向地振动针阀,从而有效地防止燃料流入排气通道,使得 可以将最小量的排出气体保持在恒定水平。 在另一方面,在针阀的几乎完全关闭位置,本发明通过将步进电动机沿方向连续驱动来确定针阀的行程量与排气量与平坦特性之间的关系是有效的 的针阀的完全关闭位置,使得最小量的排气可以保持在防止燃料流入排气通道的水平。