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<title>剖析柴油发电机着火困难的故障缘由有哪几点</title>
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<meta name="description" content="按照cummins技术要点柴油发电机应在5s内正常起动，如果多次按起动按钮，发动机仍然着火困难，就说明启动系统出现了故障。当遇到这种情况我们首先要找到不能开启的因由然后进行排查，一般情况下起动不了或不能起动的原因是柴油机转速低；油气通道" />
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<h1 class="h1">剖析柴油发电机着火困难的故障缘由有哪几点</span></h1>
<div class="text">发布来源：重康电力（深圳）有限公司　　发布日期: 2026-01-12　　访问量:31</div>
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<p>按照cummins技术要点柴油发电机应在5s内正常起动，如果多次按起动按钮，发动机仍然着火困难，就说明启动系统出现了故障。当遇到这种情况我们首先要找到不能开启的因由然后进行排查，一般情况下起动不了或不能起动的原因是柴油机转速低；油气通道不畅通；汽缸压缩不良；供油正时。</p><p>在查看之前，应仔细观察事故现象，通过状况看本质，逐步压缩，即可达到消除故障的目的。对柴油发电机不能起动或很难着车这一事故而言，一般根据以下几种不同的事故现状进行判定和查看。</p><p>操作电启动的柴油发电机，如起动速度极其缓慢，此状况大多是启动电机工作无力，并不说明柴油发电机本身有事故。应当在电起动线路方面详细察看，预判电瓶电量是否充足，各导线连接是否紧固良好及启动电机工作是否正常等，此外还应察看空气过滤器是否堵塞。</p><p>对手摇启动的柴油发电机来说，如果减压机构未放入准确位置或调整不对、气门间隙调整不好使气门顶住了活塞往往会感到摇机很费力，其特点是主轴转到某一部位时就转不动，但能退回来。此时除了查看减压阀和气门间隙外，还应严查正时齿轮的啮合关系是否准确。</p><p>首先查看柴油发电机起动时环境温度是否较低，然后验查油路中是否有空气或水分。柴油发电机供给装置的管路接头固定不紧，喷油嘴针阀卡住，停机前油箱内的柴油已用完等都可能使空气进入柴油发电机供给装置。这样，当喷油泵柱塞压油时，进入油路的空气被压缩，油压不能升高。当喷油嘴的柱塞进油时，空气体积膨胀，危害吸油，结果供油量忽多忽少<a href="http://www.fdjhs.cn" target="_blank">柴油发电机公司厂家</a>。</p><p>将柴油滤芯上的放气螺钉、喷油器上的放气螺钉或喷油泵上的高压油管拧松<a href="http://www.fdjhs.cn" target="_blank">东风康明斯发电机官网</a>，转动柴油发电机，如有气泡冒出，即表明柴油供给系统内有空气存在。</p><p>将油路各处接头拧紧，然后将喷油泵上的放气螺钉拧松，转动主轴，直到出油没有气泡为止，再拧紧放气螺钉后开机。如发现柴油中有水分，也可用相同的程序察看，并查明柴油中含有水分的起因<a href="http://www.fdjhs.cn" target="_blank">发电机组</a>，按要点替换燃油箱中的柴油。</p><p>如果没有空气或水分混杂在柴油中，应该继续验查喷油咀的性能是否良好和供油配气时间是否得当。对单缸柴油发电机来说，应先判定喷油器的工作性能状况。</p><p>这主要是由低压油路不供油致使的。这时具体顺着油箱、输油管、柴油过滤器、输油泵和喷油嘴等进行验查，通常就能找出产生损坏的部位。</p><p>判断油路或过滤器是否堵塞，可将滤清器通喷油泵的油管拆下，如油箱内存油很多，而从滤清器流出的油很少或者没有油流出，即说明过滤器已堵塞。如果低压油路供油良好，则造成柴油发电机高压无油的因由多在于喷油嘴中柱塞偶件磨耗或安装不正确。</p><p>装有减压装置等柴油发电机，如将减压装置处于不减压的位置，仍能用手摇把轻快地转动柴油发电机，且感觉阻力不很大，则可断定汽缸漏气。</p><p>进气门或排气门漏气后，汽缸内的压缩温度和压力都不高，柴油就不易着火燃烧。这类漏气发生的具体原因：</p><p>（2）气门密封锥面上或是气门座上有积炭等杂物，也使气门关闭不严。察看时可以摇转曲轴，如听到空气滤芯和排烟管内有“吱、吱”的声音，则说明进、排气门有漏气情形。</p><p>（3）转动曲轴时，如发现在汽缸盖与机体的接合面处有漏气的声音，则说明在气缸垫的部位有漏气处。可能是汽缸盖螺母没有拧紧或有松动，也可能是汽缸垫故障。</p><p>（4）转动曲轴时，缸体内部或加机油口处发现有漏气的声音，起因多数出在活塞环上。为了查明汽缸内压缩力不足是不是因活塞环不好而造成的，可向气缸中加入适量的干净润滑油，如果加入机油后汽缸内压缩力显然增加，就表明活塞环磨耗过甚，使气缸与活塞环之间的配合间隙过量，空气在活塞环与气缸套之间漏入机油盘。</p><p>（5）如果加入机油后，压缩力变化不大，表明气缸内压缩力不足与活塞环无关，而可能是空气经过进气门或排气门漏走。</p></div><a href="http://www.fdjhs.cn/" target="_blank">http://www.fdjhs.cn</a>
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