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    • 63. 发明授权
    • Engine air/fuel ratio control system injecting bleed air into both fuel
systems of double barreled carburetor
    • 发动机空气/燃料比控制系统将泄放空气注入双桶化油器的两个燃料系统
    • US4426976A
    • 1984-01-24
    • US325198
    • 1981-11-27
    • Toshio TanahashiHidemi OhnakaYasuo Ohmori
    • Toshio TanahashiHidemi OhnakaYasuo Ohmori
    • F02D41/14F02M3/09F02M7/24F02M11/00F02M11/02F02M7/18
    • F02M11/02F02M3/09F02M7/24
    • An engine includes a double barreled carburetor. A sensor mounted to the exhaust system detects the concentration of a component in the exhaust. A control unit, based on a signal from the sensor, dispatches a control signal to an air bleed control valve to vary its resistance. Primary and secondary path systems lead from the outlet of the air bleed control valve and respectively supply primary bleed air into the fuel which is being supplied into the primary barrel of the carburetor and secondary bleed air into the fuel which is being supplied into the secondary barrel of the carburetor. A one way valve is fitted in the secondary path system so as to allow air flow only towards the secondary barrel, and not away therefrom. Thus, when both barrels are opened, bleed air is sucked in to the primary barrel through the primary path system, and also bleed air is sucked in to the secondary barrel through the secondary path system past the one way valve; but, when only the primary barrel is opened, bleed air is sucked in to the primary barrel through the primary path system, but no bleed air is sucked in to the secondary barrel through the secondary path system, and the one way valve prevents reverse flow of air from the secondary barrel through the secondary path system and thencefrom into the primary path system towards the primary barrel.
    • 发动机包括双桶化油器。 安装到排气系统的传感器检测排气中的组分的浓度。 控制单元基于来自传感器的信号,将控制信号调度到排气控制阀以改变其阻力。 一级和二级路径系统从排气控制阀的出口引出,并分别向正在供应到化油器的主桶中的燃料提供初级排放空气,并将次级排放空气供入到被供应到二级桶中的燃料中 的化油器。 单向阀安装在次级路径系统中,以便仅使空气流向次级桶,并且不从其流出。 因此,当两个桶打开时,排出的空气通过主路径系统被吸入主桶,并且通过次级路径系统通过单向阀将排放空气吸入二次桶中; 但是,当只有主桶打开时,排放空气通过主路径系统被吸入主桶,但没有通过次级路径系统将吸入的空气吸入二次桶,并且单向阀防止反向流动 来自次级桶的空气通过次级路径系统,从那里进入主路径系统朝向主桶。