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    • 2. 发明授权
    • Dual sensor misfire detection apparatus and method for an internal
combustion engine
    • 双传感器失火检测装置和内燃机的方法
    • US5561600A
    • 1996-10-01
    • US510884
    • 1995-08-03
    • Jay C. McCombie
    • Jay C. McCombie
    • G01M15/11G01M15/00
    • G01M15/11
    • A misfire detection apparatus and method is provided for detecting misfire in cylinders of an internal combustion engine in a motor vehicle. The method includes sensing rotation of a crankshaft and calculating a crankshaft velocity based on the sensed rotation of the crankshaft. The method also includes repeating the sensing and calculating steps a predetermined number of times to develop a measured crankshaft velocity profile. The method further includes obtaining a stored misfire velocity profile based on speed of the crankshaft, comparing the measured crankshaft velocity profile to the stored misfire crankshaft velocity profile to determine if a match exists, and counting a misfire if a match exits.
    • 提供了用于检测机动车辆内燃机的气缸中的失火的失火检测装置和方法。 该方法包括感测曲轴的旋转并基于感测到的曲轴的旋转来计算曲轴速度。 该方法还包括重复感测和计算步骤预定次数以产生测量的曲轴速度分布。 该方法还包括基于曲轴的速度获得存储的失火速度分布,将测量的曲轴速度分布与存储的失火曲轴速度分布进行比较,以确定是否存在匹配,并且如果匹配退出则计算失火。
    • 5. 发明授权
    • Engine misfire detection with compensation for normal acceleration of
crankshaft
    • 发动机失火检测,补偿曲轴正常加速
    • US5574217A
    • 1996-11-12
    • US468117
    • 1995-06-06
    • Jay C. McCombie
    • Jay C. McCombie
    • G01M15/11G01M15/00
    • G01M15/11
    • An apparatus and method are provided for detecting cylinder misfires in an internal combustion engine of a motor vehicle which is capable of detecting multiple cylinder misfires and more particularly opposed cylinder misfires. Crankshaft rotation is sensed and crankshaft velocities are measured for each cylinder. Changes in angular velocity are determined and correspond to each of a plurality of cylinder firing events. Angular velocity changes are sorted over a predetermined series of cylinder firings and the two middle most angular velocity changes are averaged to provide an average change in velocity value. A deviation is determined between the change in angular velocity for a selected cylinder and the average change in velocity value. The deviation is compared to a threshold value and a misfire event is determined for the selected cylinder based on the comparison.
    • 提供了一种用于检测机动车辆的内燃机中的气缸失火的装置和方法,其能够检测多个气缸失火,更特别是相对的气缸失火。 检测曲轴旋转,并测量每个气缸的曲轴速度。 确定角速度的变化并对应于多个气缸点火事件中的每一个。 角速度变化在预定的一系列气缸点火中分选,并且两个最大角速度变化被平均以提供速度值的平均变化。 在所选择的气缸的角速度的变化与速度值的平均变化之间确定偏差。 将偏差与阈值进行比较,并且基于比较确定针对所选择的气缸的失火事件。
    • 8. 发明授权
    • Engine misfire detection with rough road inhibit
    • 发动机失火检测与粗糙路面抑制
    • US5544521A
    • 1996-08-13
    • US469040
    • 1995-06-06
    • Jay C. McCombie
    • Jay C. McCombie
    • G01M15/11G01M15/00
    • G01M15/11F02D2200/702
    • An apparatus and method are provided for detecting cylinder misfires in an internal combustion engine of a motor vehicle and inhibiting misfire detection during the presence of noise related events. Misfire detection is performed to detect the occurrence of one or more misfire events. Crankshaft rotation is sensed and crankshaft velocities are measured for each cylinder and changes in angular velocity are determined for each cylinder firing event. Angular velocity changes are sorted and averaged to provide an average change in velocity value and a deviation value is determined. The deviation is compared to a threshold value and misfire events are determined based on the comparison. A comparison value is determined as a function of change in positive deviations of change of velocity and a time decay rate. The comparison value is compared with a threshold value. Misfire detection is disabled or inhibited when the comparison value exceeds the threshold value. The comparison value is reduced with the time decay rate.
    • 提供一种用于检测机动车辆的内燃机中的气缸失火并且在存在噪声相关事件期间抑制失火检测的装置和方法。 执行失火检测以检测一个或多个失火事件的发生。 检测曲轴旋转,并测量每个气缸的曲轴速度,并为每个气缸点火事件确定角速度的变化。 对角速度变化进行排序和平均,以提供速度值的平均变化,并确定偏差值。 将偏差与阈值进行比较,并且基于比较确定失火事件。 确定比较值作为速度变化和时间衰减速率的正偏差变化的函数。 将比较值与阈值进行比较。 当比较值超过阈值时,失火检测被禁止或禁止。 比较值随时间衰减率而降低。