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    • 6. 发明公开
    • AIR-FUEL RATIO CONTROL DEVICE FOR A CARBURETOR
    • 欧洲维吾尔自行车维吾尔自行车
    • EP2492485A1
    • 2012-08-29
    • EP10824723.0
    • 2010-08-25
    • Mitsubishi Heavy Industries, Ltd.
    • MAKI, Kazuhiro
    • F02M7/00F02D9/02F02D11/10F02M7/12
    • F02D41/0002F02D11/105F02D11/106F02D2011/104F02D2200/0404F02M1/08F02M7/20Y02T10/42
    • It is intended to provide an air-fuel ratio control device for a carburetor, which is capable of variably inject fuel by opening and closing a choke valve in accordance with an opening degree of a throttle valve and the load and which is capable of achieving low cost, clean emission and fuel saving by attaining a desired air-fuel ratio in an entire operational range (rotation speed, load) of the internal combustion engine. The air-fuel ratio control device is provided with, but not limited to, a choke valve 6 arranged in an intake path of an internal combustion engine 1, a throttle valve 7 arranged in the intake path on a downstream side of the choke valve, a first stepper motor 8 driving the choke valve 6 to adjust an opening degree of the choke valve 6, a second stepper motor 9 driving the throttle valve 7 to adjust an opening degree of the throttle valve 7, and a controller 12 controlling the opening degree of the choke valve 6 in accordance with a change of a rotation speed of the internal combustion engine 1 based on the opening degree of the throttle valve 7, and, when the rotation speed of the internal combustion engine 1 is constant, controls the opening degree of the choke valve 6 based on a map which determines the opening degree of the choke valve 6 from load of the internal combustion engine 1, so as to achieve a desired air-fuel ratio.
    • 旨在提供一种用于化油器的空燃比控制装置,其能够通过根据节流阀的开度和负载来打开和关闭阻塞阀来可变地喷射燃料,并且能够实现低 通过在内燃机的整个工作范围(转速,负荷)下实现所需的空燃比来实现成本,清洁排放和节省燃料。 空燃比控制装置设置有但不限于设置在内燃机1的进气路径中的节流阀6,设置在阻流阀下游侧的进气路径中的节流阀7, 第一步进马达8驱动阻流阀6以调节阻流阀6的开度;驱动节流阀7调节节流阀7的开度的第二步进马达9;以及控制开度的控制器12 根据节气门7的开度,根据内燃机1的转速的变化,当内燃机1的转速恒定时,控制开度 基于从内燃机1的负荷确定阻流阀6的开度的映射图,以获得期望的空燃比。