Electrical Converter (Pulse Width Modulated) - For EUI Engines and PEEC Engines Only
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| 图 1 | g00474634 |
到 PWM 转换器的模拟 (1) 转速降电位计。 | |
电转换器用来将转速电位计的模拟信号变为脉冲宽度调制信号。 发动机电子装置现在便可以识别 PWM 信号。 电转换器安装在控制面板内的安装板上。
电转换器连续产生两个 PWM 信号，即转速和转速降。 转速循环的占空比在2 到 95% 的范围内与从转速电位计收到的信号成正比变化。 其调整由操作员负责。 转速降信号的占空比在2 到 95% 的范围内与从电转换器上转速降电位计收到的信号成正比变化。 其调整由维修人员负责。 PWM 信号的基础频率在 415 Hz 到 528 Hz 的范围内保持恒定。
通过油门位置传感器的端子为电转换器提供工作电源。 端子上提供有 "B-" 和 "B+"。 端子 "1" 为输入，并且此端子与转速电位计的端子 "3" 相连。 端子 "2" 为输入，并且此端子与转速电位计的端子 "2"（雨刮器）相连。 电转换器的端子 "3" 为输入，并且此端子与转速电位计的端子 "1" 相连。 电转换器的端子 "S" 为输出，并且此端子为发动机电子控制装置提供转速信号。 电转换器的端子 "D" 为输出，并且此端子为发动机电子控制装置提供转速降信号。
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