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    • 12. 发明授权
    • Air-fuel ratio control system for engine
    • 发动机空燃比控制系统
    • US5080072A
    • 1992-01-14
    • US623529
    • 1990-12-07
    • Tetsushi HosokaiTetsuro TakabaToshihiro IshiharaHideki Kobayashi
    • Tetsushi HosokaiTetsuro TakabaToshihiro IshiharaHideki Kobayashi
    • F02D45/00F02D41/14
    • F02D41/1495F02D41/148
    • An air-fuel ratio control system for an engine has an air-fuel ratio sensor which generates an output value which changes according to an air-fuel ratio in an air-fuel mixture fed to the engine. An upper preset value which corresponds to an output value of the air-fuel ratio sensor for an air-fuel ratio which is larger than a stoichiometric air-fuel ratio and a lower preset value which corresponds to an output value of the air-fuel ratio sensor for an air-fuel ratio which is smaller than the stoichiometric air-fuel ratio are set. They are respectively reduced and increased by a predetermined value at one time at regular intervals, and are shifted each time the output value of the air-fuel ratio sensor exceeds the upper preset value at that time and reduces below the lower preset value at that time, to the output value of the air-fuel ratio sensor at that time. It is determined that the air-fuel ratio sensor is abnormal when the difference between the upper and lower preset values becomes smaller than a predetermined reference difference.
    • 用于发动机的空燃比控制系统具有空燃比传感器,其产生根据供给到发动机的空燃混合物中的空燃比而变化的输出值。 对应于空燃比的空燃比传感器的输出值大于理论空燃比的预设值和与空燃比的输出值对应的下限值 设定小于理论空燃比的空燃比的传感器。 它们以规则的间隔分别一次减小预定值,并且每当空燃比传感器的输出值超过该时间的上限预设值并且在该时间内降低到低于预定值的下限时移动 ,相对于此时的空燃比传感器的输出值。 当上下预设值之间的差小于预定的基准差时,确定空燃比传感器异常。
    • 13. 发明授权
    • Ignition timing control system for engine
    • 发动机点火正时控制系统
    • US5197431A
    • 1993-03-30
    • US804661
    • 1991-12-10
    • Tetsuro TakabaTetsushi HosokaiToshihiro IshiharaHideki Kobayashi
    • Tetsuro TakabaTetsushi HosokaiToshihiro IshiharaHideki Kobayashi
    • F02D45/00F02P5/15
    • F02P5/1504Y02T10/46Y10T477/69
    • An ignition timing control system for an engine equipped with an automatic transmission corrects an ignition timing advance so as to retard ignition upon a demand to drop engine output torque when resumption of fuel injection is required after it has been interrupted during deceleration or when a shift of the automatic transmission is required. The ignition timing advance is corrected by a decaying retardation value so as to gradually fall with the passage of time. The corrected ignition timing advance is kept above a specific lower ignition timing advance limit, which is set smaller for lower air charging levels than for higher air charging levels. The corrected ignition timing advance is also kept below a specific lower limit ignition timing advance, which is set larger for lower air charging levels than for higher air charging levels.
    • 用于配备有自动变速器的发动机的点火正时控制系统校正点火正时提前,以便在减速期间需要恢复燃料喷射之后需要降低发动机输出转矩的时间点来延迟点火, 需要自动变速器。 点火正时提前通过衰减延迟值来校正,随着时间的推移逐渐下降。 校正的点火正时提前被保持在特定的较低点火正时提前极限以下,其对于较低的空气充气水平设置为比较高的充气水平设定得更小。 校正的点火正时提前也保持在特定的下限点火正时提前,其设定为比较高的空气充气水平低的充气水平。
    • 14. 发明授权
    • Idle speed control system for engine
    • 发动机空转速度控制系统
    • US5065717A
    • 1991-11-19
    • US634601
    • 1990-12-27
    • Tetsushi HosokaiTetsuro TakabaToshihiro IshiharaHideki Kobayashi
    • Tetsushi HosokaiTetsuro TakabaToshihiro IshiharaHideki Kobayashi
    • F02D31/00F02D41/08F02D41/16F02D45/00
    • F02D31/005F02D41/16
    • An idle speed control system for an engine includes an idle regulator valve which controls the amount of intake air to be fed to the engine when the engine idles and a control unit which detects an engine speed and controls the opening of the idle regulator valve so that the detected engine speed converges on a target idle speed. The control unit calculates a basic air charging efficienty required to fixedly operate the engine at a target idle speed, calculates a first target air charging efficiency by feedback correction of the basic air charging efficiency on the basis of a correction value which is determined according to the difference between an actual idle speed and a target idle speed, calculates a second target air charging efficiency which is the air charging efficiency obtained when the engine is fixedly operated at a detected idle speed while the amount of intake air is kept at a mass flow which will fixedly provide the first target air charging efficiency, calculates a final target mass flow which provides a first-order lag air charging efficiency equal to the second target air charging efficiency, and controls the opening of the idle regulator valve on the basis of the final target mass flow.
    • 用于发动机的怠速控制系统包括怠速调节阀,其控制当发动机空转时供给到发动机的进气量;以及控制单元,其检测发动机转速并控制怠速调节阀的打开,使得 检测到的发动机速度收敛于目标怠速。 控制单元计算在目标怠速下固定地操作发动机所需的基本空气充气效率,通过基于根据本发明的确定的校正值反馈校正基本空气充气效率来计算第一目标空气充气效率 实际怠速与目标怠速之间的差异计算出当发动机在检测到的怠速下固定操作时获得的充气效率的第二目标充气效率,同时进气量保持在质量流量 将固定地提供第一目标空气充气效率,计算最终目标质量流量,其提供等于第二目标充气效率的一阶滞后充气效率,并且基于最终的目标空气充气效率来控制怠速调节阀的打开 目标质量流量。