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	<div class="topmbx"><div class="mbx">当前位置：<a href="/">首页</a> › <a href="/xinwen-2/">行业新闻</a> › <a href="/xinwen-2/a2/">技术知识</a> › 冷却液温度感应感应器、机油压力和速度器的损坏检验	</div></div>
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<h1 class="h1">冷却液温度感应感应器、机油压力和速度器的损坏检验</span></h1>
<div class="text">发布来源：重康电力（深圳）有限公司　　发布日期: 2026-01-05　　访问量:31</div>
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<p>康明斯柴油发电机常用的三大感应系统是速度探头、机油压力探头和水温感应器，多利用阻值随压力、温度的变化特征制成，因而损坏的判定可通过测试电阻值和测量电压值的程序实现。</p><p>发动机水温感应器又称冷却液温度传感器，传感器一般安装在发动机机体、缸盖的水套或节温器内并伸入水套中。</p><p>从机上拆下冷却液温度传感器，并将其置于水杯中，缓慢加热增强水温；同时用万用表测定感应器两端子间的电阻值，应在正常范围内；否则表明感应器已损坏<a href="http://www.fdjhs.cn" target="_blank">康明斯发动机型号大全</a>，应换用新的传感器。水温传感器阻值的参考变化范围为正常的感应器20℃时的电阻值为2～3kΩ，40℃时的电阻值为0.9～1.3kΩ，80℃时应为0.2～0.4kΩ左右。如果测量结果不符合规定要求，应更替。</p><p>发动机机油压力开关通常安装在发动机机体的主油道上，用于检验发动机机油压力值的大小，当低于某一规定值时，点亮机油压力警告灯。机油压力开关由弹簧、膜片及触点结构机油压力感应器可利用压气机气压测试，并用万用表检测感应器两端子间的电阻值，应在正常范围内(参考使用手册)。</p><p>在发动机不能发动时，连接发动机诊断仪，在运转起动电机的时候查看转速数据是否正常。（卸下接头）把数字万用表打到欧姆档，两表笔分别接感应器2#、3#针脚，20℃时额定电阻为860Ω±10%。（接上接头）把数字万用表打到直流电压档，两表笔分别接传感器2#、3#针脚，起动发动机，此时应有电压输出。（建议用示波器查看）用示波器观察输出电压，应观察得到的波形，且输出波形的峰-峰值及频率应随着发动机速度的增加而增加。</p><p>（1）拔下感应器连接器后，用高阻抗数字式万用表欧姆挡就车查看感应器接头两端子间的电阻。若电阻值偏差过量、过小或为无穷，说明探头失效，则应更换新的探头。</p><p>（2）使用诊断工具与电喷装置ECM进行通讯，读取ECM中的故障参数，从而可以对探头的失效做出判定。</p><p>可就机测试感应器输出的电压值。感应器正常连接和工作时<a href="http://www.fdjhs.cn" target="_blank">柴油发电机十大品牌</a>，从感应器信号接线柱对地测试探头输出的电压信号，其电压值应随温度或压力的变化而变化，检测电压并与正常数据值相比较，即可预判探头是否在正常作业<a href="http://www.fdjhs.cn" target="_blank">康明斯发电机组厂家排名</a>。</p><p>用直流电压表检测水温传感器插头（线束侧）电源端子与搭铁之间的电压，应为5V左右。如果电压低或无电压，检验水温感应器与ECM之间的线路。</p><p>对于cummins柴油发电机所用转速探头，因其多是磁脉冲式的，能发出交流电压信号，故检测时可操作万用表或示波器。一个性能良好的速度探头在用万用表交流电压档测量时，其输出电压应在1.5～3.0V范围内。若无交流电压输出或输出电压不符合规定，则传感器故障或安装不当。</p><p>如果怀疑传感器内部导线接触不良，可将万用表置于电阻档，与探头导线相连接，然后晃动导线看万用表指针是否摆动，如果摆动则证明传感器内部导线接触不佳，应排除。</p><p>机油压力感应器压力与输出电压成线伏。拔下机油压力传感器线束插头，再开机，测量其插头的3脚A24与搭铁间电压是否为输入电压是否为输入电压，4脚与搭铁间的电压是否为零。</p></div><a href="http://www.fdjhs.cn/" target="_blank">http://www.fdjhs.cn</a>
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