发动机冷却液温度传感器 - 什么是发动机冷却液温度传感器?

 发动机冷却液温度传感器 - 什么是发动机冷却液温度传感器?

Dan Hart

什么是发动机冷却液温度传感器?

发动机冷却液温度传感器可以是

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冷却液温度传感器

它的工作是报告发动机的温度。 发动机冷却液温度传感器直接向动力总成控制模块或发动机控制模块报告其结果。 PCM/ECM使用发动机冷却液温度读数来计算需要多少燃料。添加到进入的空气中。

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发动机冷却液温度传感器通常位于恒温器壳体附近

发动机冷却液温度传感器是如何工作的?

大多数发动机冷却液温度传感器是正温度系数或负温度系数的热敏电阻。 PCM/ECM向传感器提供电压,传感器根据空气温度施加不同的电阻量来改变输入的电压。

负温度系数的热敏电阻随着温度的升高而降低电阻,而正温度系数的热敏电阻随着温度的升高而增加电阻。

如果PCM/ECM提供一个5伏的输入信号,它应该看到一个如下所示的返回电压

正的温度系数

发动机冷却液温度传感器

温度 °F 电压

-40°F 4.90 V

+33° F 4.75 V

+68° F 4.00 V

+100°F 3.00 V

+143° F 2.00 V

+176° F 1.30 V

+248° F 0.60 V

+305° F 0.0 V

发动机冷却液温度传感器出了什么问题?

像其他任何传感器一样,传感元件可能会失效,电气连接器的终端可能会腐蚀并改变读数,或者线束可能会出现短路或开路。

如何测试发动机冷却液温度传感器?

你可以使用设置在直流电压刻度上的数字欧姆表来测试发动机冷却液温度传感器。 将IGN开关转到ON位置,反向探测回线,以看到报告给PCM/ECM的电压。 你也可以测试传感器的电阻,但这没有读取实际回线电压那么准确。

如何更换发动机冷却液温度传感器?

发动机冷却液温度传感器(IAT)传感器可以用螺丝钉固定在进气歧管上,或者简单地推入一个橡胶扣眼中。 拆下旧的传感器,在其位置上安装新的传感器。

发动机冷却液温度传感器故障的症状

发动机会摇动,但在早晨第一件事的冷启动时无法点火。 发动机冷却液温度读数不正确,导致PCM/ECM为当前的发动机温度提供太稀薄的混合物。

发动机摇动,但只有在部分踩下油门踏板时才能启动。 踩下油门踏板推翻了工厂的编程,迫使PCM/ECM向混合物中添加气体。 如果发动机在踩下踏板时启动,怀疑发动机冷却液温度传感器有故障或传感器接线有故障。

汽油里程差

Dan Hart

Dan Hart is an automotive enthusiast and expert in car repair and maintenance. With over 10 years of industry experience, Dan has honed his skills through countless hours of working on various makes and models. His passion for cars started at a young age, and he has since turned it into a successful career.Dan's blog, Tips for Car Repair, is a culmination of his expertise and dedication to helping car owners tackle common and complex repair issues. He believes that everyone should have some basic knowledge of car repair, as it not only saves money but also empowers individuals to take control of their vehicle's maintenance.Through his blog, Dan shares practical and easy-to-follow tips, step-by-step guides, and troubleshooting techniques that break down complex concepts into understandable language. His writing style is approachable, making it suitable for both novice car owners and experienced mechanics seeking additional insights. Dan's goal is to equip his readers with the knowledge and confidence needed to tackle car repair tasks on their own, thus preventing unnecessary trips to the mechanic and expensive repair bills.In addition to maintaining his blog, Dan also runs a successful auto repair shop where he continues to serve his community by providing high-quality repair services. His dedication to customer satisfaction and his unwavering commitment to deliveringexceptional workmanship has earned him a loyal customer base over the years.When he's not under the hood of a car or writing blog posts, you can find Dan enjoying outdoor activities, attending car shows, or spending time with his family. As a true car enthusiast, he is always up-to-date with the latest industry trends and eagerly shares his insights and recommendations with his blog readers.With his vast knowledge and genuine passion for cars, Dan Hart is a trusted authority in the field of car repair and maintenance. His blog is an invaluable resource for anyone looking to keep their vehicle running smoothly and avoid unnecessary headaches.