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    • 8. 发明公开
    • Electronic position sensor assembly and control system
    • Elektronischer Winkelgeber mit Steuerungssystem
    • EP0879956A1
    • 1998-11-25
    • EP98112946.3
    • 1989-04-20
    • MOTOROLA, INC.
    • Deutsch, Robert W.
    • F02P7/073F02P7/077F02P15/00
    • F02D41/009F02P7/073F02P7/0775F02P15/008
    • An electronic position sensor assembly and engine control system (10) in which two sensing elements (13, 14) in a dual sensor (12) provide separate, independent position signals (A, B) related to multi-cylinder engine cycle position by sensing the angular position of a engine-rotated slotted wheel (11). The sensing elements provide identical sensing signals shifted from each other by a predetermined angular amount (d). In response to the simultaneous providing of a pulse by both sensing elements, a first reference signal (at 22) identifying a reference cylinder is provided for controlling electronic distribution of spark timing and/or fuel injection signals to engine cylinders (17-20). In response to a selected one of the sensing elements producing a pulse which has a predetermined longer duration than a preceding produced pulse, a second reference signal (after 50) is produced indicative of top-dead center engine cylinder cycle position for one of the cylinders. In response to detecting a fault in the position signal produced by the one selected sensing element, a switch (27) selects the other of the sensing elements for utilization in producing the second reference signal, and a substitute reference signal circuit (40) provides a substitute first reference signal. A less expensive and more reliable engine position sensor assembly and engine control system is provided since proper system operation is maintained despite a fault in one of the position signals.
    • 一种电子位置传感器组件和发动机控制系统(10),其中双传感器(12)中的两个感测元件(13,14)通过感测提供与多气缸发动机循环位置相关的独立的独立位置信号(A,B) 发动机旋转的开槽轮(11)的角位置。 感测元件提供彼此移位预定角度量(d)的相同感测信号。 响应于通过两个感测元件同时提供脉冲,提供了识别参考气缸的第一参考信号(在22处),用于控制发动机气缸(17-20)的火花正时和/或燃料喷射信号的电子分配。 响应于所选择的一个感测元件产生具有比先前产生的脉冲具有预定的更长持续时间的脉冲,产生第二参考信号(50之后),指示一个气缸的上止点中心发动机气缸循环位置 。 响应于检测由一个所选择的感测元件产生的位置信号的故障,开关(27)选择用于产生第二参考信号的另一个感测元件,替代参考信号电路(40)提供 替代第一个参考信号。 提供了一种较便宜且更可靠的发动机位置传感器组件和发动机控制系统,因为即使在其中一个位置信号中存在故障,仍然保持适当的系统操作。