Air intake side secondary air supply system for an internal combustion
engine
    1.
    发明授权
    Air intake side secondary air supply system for an internal combustion engine 失效
    用于内燃机的进气侧二次空气供应系统

    公开(公告)号:US4677959A

    公开(公告)日:1987-07-07

    申请号:US865394

    申请日:1986-05-21

    CPC classification number: F02D41/149 F02D35/003 F02M23/04 F02M23/08 Y02T10/146

    Abstract: Air intake side secondary air supply system for an internal combustion engine includes first and second secondary air supply passages leading to an intake manifold in which an open/close valve and an air control valve are respectively provided for a proportional control and an integral control of secondary air. In order to improve a driveability of the engine during a transition period from a feedback control mode to an open loop control mode, pressure control device for controlling a supply of first and second control pressures respectively for opening and closing the air control valve is constructed to rapidly supply the second control pressure when a state of engine operation in which the feedback control mode is to be stopped is detected.

    Abstract translation: 用于内燃机的进气侧二次空气供应系统包括通向进气歧管的第一和第二二次空气供应通道,其中分别设有开/关阀和空气控制阀用于比例控制和二次侧积分控制 空气。 为了提高在从反馈控制模式到开环控制模式的过渡期间发动机的驾驶性能,分别用于控制用于打开和关闭空气控制阀的第一和第二控制压力的供给的压力控制装置被构造成 当检测到反馈控制模式要停止的发动机运转状态时,迅速地提供第二控制压力。

    Air-fuel ratio feedback control method for internal combustion engines
    7.
    发明授权
    Air-fuel ratio feedback control method for internal combustion engines 失效
    内燃机空燃比反馈控制方法

    公开(公告)号:US4796589A

    公开(公告)日:1989-01-10

    申请号:US148486

    申请日:1988-01-26

    CPC classification number: F02D41/1491

    Abstract: A method of effecting feedback control of the air-fuel ratio of an air-fuel mixture being supplied to an internal combustion engine, to bring the air-fuel ratio to desired values by correcting a fuel quantity to be supplied to the engine by means of a correction coefficient which varies in response to output from an exhaust gas concentration sensor, when the engine is operating in an air-fuel ratio feedback control region. An average value of values of the correction coefficient obtained is calculated while the engine is operating in the feedback control region. The calculated average value is corrected in dependence on a temperature of the engine and the feedback control is initiated by using the corrected average value as an initial value of the correction coefficient when the engine has shifted into the feedback control region from the another region. The calculated average value is corrected to such a value as to make the air-fuel ratio leaner as the engine temperature is lower.

    Abstract translation: 一种对供给到内燃机的空气燃料混合物的空燃比的反馈控制的方法,通过将供给发动机的燃料量修正为期望值,借助于 当发动机在空燃比反馈控制区域中运行时,响应于排气浓度传感器的输出而变化的校正系数。 在发动机在反馈控制区域中操作时,计算所获得的校正系数的值的平均值。 计算出的平均值根据发动机的温度进行校正,并且当发动机从另一区域转移到反馈控制区域时,通过使用校正的平均值作为校正系数的初始值来启动反馈控制。 计算出的平均值被校正为使得随着发动机温度较低而使空燃比变稀的值。

Patent Agency Ranking