推荐回答（4个）
你好题主，发动机热车时正常水温是83-93度，有些车型不一样，发动机电脑板接收水温传感器信号电压温度到93度低速风扇运转，温度降低到83度停止运转，这样如此循环，个别车型会有所不同，但差别不大。汽车水温传感器工作性能的好坏对发动机的喷油量有很大影响，进而影响发动机的燃烧性能。当混合气过浓或过稀时，发动机的燃烧情况变坏，会引起发动机不易启动，运转不平稳，这时应检查水温传感器。
水温控制：
是通过水温传感器来进行水温调控的
当出现因汽车负载过大、缺水、点火时间不对、风扇不转等故障，造成水温过高时，会使发动机机体温度上升，从而使发动机不能工作，所以在仪表系统内就设计了汽车水温传感器。利用汽车水温传感器检测发动机冷却液温度，让驾驶员能够直观地看出，发动机冷却液在任何工况时的温度，并及时作出相应的处理。在电控系统中也安装有冷却液温度传感器，用于喷油量修正信号。水温传感器是由一个NTS（负温度系数热敏电阻）构成的传感器，当发动机温度低时 传感器电阻变大， 压降也增大， 所以相对信号电压较高，汽车ECU（行车电脑）便判断数据此时的水温变化。
冷却系统有两个控制散热器的元件
一个是水温感应塞
另外一个是温控开关
汽车运行时水温达到90度时汽车电脑接受信号
然后给温控开关发出指令
温控开关随信号的强弱调节线路电阻的大小从而使散热器散热 。
水温感应塞感应水温发出信号给电脑、
电脑接收后再命令温控开关闭路 ，当水温升至90度左右时，水箱风扇就会自动转动将水温降低到80-90度左右，散热器开始散热。请采纳谢谢！！
不同的发动机水温不同，正常的发动机工作温度是80到90℃，只有在这个温度下发动机才能发挥到最大功率和工作状态。发动机通过节温器打开和关闭来使发动机的热水进入到水箱散热循环，同时高温时还需要电子风扇来降温，望采纳。
“发动机热车时正常水温是83-93度,有些车型不一样,发动机电脑板接收水温传感器信号电压温度到93度低速风扇运转,温度降低到83度停止运转,这样如此循环,个别车型会有所不同,但差别不大。汽车水温传感器工作性能的好坏对发动机的喷油量有很大影响,进而影响发动机的燃烧性能。当混合气过浓或过稀时...”
你好，水冷式发动机正常工作温度应为80—90度。发动机的温度以解放CA10B型汽车为例，可根据发动机的温度，拉出（即打开）或推出（即开闭）驾驶室内的百叶窗操纵手柄，改变进入散热器的空气量，从而调整发动机温度。
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