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电控硅油风扇工作原理
电控硅油风扇工作原理
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电控硅油风扇工作原理
冷却系统的风扇控制,决定着发动机运转温度的稳定性。众所周知,柴油发动机最佳工作温度通常在摄氏85-95度之间。伴随着卡车发动机的技术发展,发动机热管理系统中,冷却系统风扇设计也经历了不小的变革,归纳起来主要经历了三个阶段:早期的刚性风扇,硅油离合器风扇,还有目前先进的电磁离合器风扇与电控硅油离合器风扇。今天我们聊一聊电控硅油离合器风扇。
电控硅油离合器风扇
电控硅油风扇离合器与硅油风扇离合器结构类似,不同的是由带有电磁线圈的电磁阀门取代硅油风扇离合器热敏双金属感温阀门。
电控硅油离合器优点为:反应迅速、无极调速、风扇实际转速可测、散热器与风扇位置不受限制、节能效果更好。
ECU收集发动机转速、散热器水温、中冷器气温、风扇的转速信号,并对这些数据进行整理和计算,按脉冲宽度调制理论(PWM)输出电脉冲指令到电控硅油风扇离合器的电磁线圈,控制离合器阀门开启程度,即决定离合器工作室的硅油量,进而改变风扇的转速。
原创: 车匠在线团队
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