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<h1 class="h1">柴油发电机冒白烟的故障缘由小议</span></h1>
<div class="text">发布来源：康柴（深圳）电力技术有限公司　　发布日期: 2026-01-15　　访问量:5</div>
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<p>摘要：柴油发电机排白烟的本质是未燃烧的柴油油雾、水蒸气或防冻液在排气管中冷凝形成的微小液滴，并与废气一起排出。白烟的具体成因可以分为以下几大类，cummins公司在本文中将进行详细论述并提供解决思路。</p><p>①&nbsp;滴油或雾化不良：喷油器关闭不严，在非喷射阶段有燃油滴入气缸；或者喷油压力不足，引起燃油雾化效果差，不能与空气充分混合。</p><p>②&nbsp;喷油嘴开启压力较低：导致燃油过早喷入气缸，此时气缸内的温度和压力过低，难以压燃。</p><p>①&nbsp;喷油过晚：这是致使热机状态下仍排白烟的具体原因。燃油喷入汽缸时，活塞已经下行，汽缸内的温度和压力下降，燃油来不及充分燃烧就被排出。</p><p>②&nbsp;喷油过早：虽然更常导致冒黑烟（粗暴燃烧），但在某些情形下也会因燃烧异常而产生白烟。</p><p>②&nbsp;燃油牌号不对：例如操作了凝点过高或挥发性过差的燃油，在低温下难以雾化和燃烧。</p><p>（1）气缸垫烧蚀（冲缸垫）：这是冷却液进入气缸的典型原因。当汽缸垫在水道和汽缸之间损坏后，冷却水会渗入燃烧室。伴随症状有水箱口有油污或冒气泡、机油油位升高且颜色变为乳白色（机油进水）、发动机功率明显下降。</p><p>（2）汽缸盖或汽缸体裂痕：与冲缸垫类似，水箱宝通过裂痕进入汽缸或油道。一般由于发动机偏热后突然加入冷水，或因冰冻造成的内部应力。</p><p>（1）气缸压力不足：活塞、活塞环与汽缸套损伤严重，气门密封不严等，引起压缩行程结束时缸内压力和温度达不到燃油自燃点<a href="http://www.gdkmsfdj.com" target="_blank">柴油机常见故障及处理方法</a>。伴随症状有发动困难，功率无力，机油消耗量增加（下排烟大）。</p><p>（1）冷起动：在低温环境下，气缸和进气温度低，燃油雾化蒸发差，部分燃油未燃烧即被排出，形成白烟。这一般是正常状况。区别是正常冷起动白烟会在发动机暖机后（运行几分钟内）逐渐消失。如果热机后仍排白烟，则属于故障。</p><p>（2）预热系统（glow plug）故障：对于预燃室式柴油机，预热塞损坏会引起冷启动时燃烧室温度不足，加剧白烟情形。</p><p>①&nbsp;冷启动时冒，热车后消失：一般是正常状况或轻微损坏（如预热机构问题、个别喷油器轻微滴油）。</p><p>②&nbsp;无味或带有甜味（防锈水味）：高度怀疑防锈水进入燃烧室（如汽缸垫损坏、机体/缸盖裂纹），这是严重故障，需立即停机。</p><p>③&nbsp;查看机油和水箱宝：拔出机油尺，检查机油液面是否升高，颜色是否变为乳白色。打开水箱盖（必须在冷机状态下！），观察冷却水表面是否有油花，或是否不断有气泡冒出。</p><p>（1）查看燃油品质：从柴油过滤器或油箱底部放出少量燃油，查验是否有水分或杂质。燃油中有水是较简单的成因之一。</p><p>（2）查验空气过滤器：查验是否过于肮脏导致进气不足。虽然进气不足更易导致黑烟，但严重时也会造成燃烧恶化。</p><p>①&nbsp;使用：启动发动机，使其在冒白烟的状态下运转。用扳手逐一、缓慢地松开各缸的高压油管螺母（注意安全，防止油雾喷出引发火灾）。</p><p>②&nbsp;判断：当松开某一缸的油管时，白烟明显减少或消失，且发动机速度变化不大，则说明该缸喷油嘴故障（如滴油、雾化不好）。如果松开每一缸时，白烟都减少<a href="http://www.gdkmsfdj.com" target="_blank">康明斯发电机图片</a>，且发动机转速变化均匀，则可能是喷油正时问题或燃油共性问题。如果松开某一缸时，白烟无变化且发动机速度几乎不变，说明该缸本来就不作业（喷油嘴完全卡死或该缸压力极低）。</p><p>（2）查验喷油正时：由专业技师操作。检查柴油泵的固定螺丝是否松动，联轴器是否磨损<a href="http://www.gdkmsfdj.com" target="_blank">柴油发电机维修保养</a>，并按维修手册标准重新校对喷油提前角。喷油过晚是热车冒白烟的易损起因。</p><p>（3）查看气缸压力（机械机构）：由专业技师使用。拆下喷油器，使用汽缸压力表测定各缸压缩压力。如果某缸压力明显偏低，则说明该缸存在活塞环/缸套损伤、气门关闭不严、汽缸垫损坏等机械故障。</p><p>①&nbsp;水箱压力测试：操作专用手压泵对冷却系统加压，保持压力一段时间。如果压力不能保持且下降迅速，说明冷却机构存在泄漏。</p><p>②&nbsp;内部泄漏判定：在加压状态下，拆下喷油嘴，观察哪里气缸孔内有冷却水渗出，即可确定损坏点。</p><p>（2）直接拆检：如果机油已严重乳化，或水箱内有大量油污，可直接拆下气缸盖，并查看气缸垫是否在水道和油道附近有烧蚀的痕迹；气缸盖和汽缸体平面是否平整，有无裂痕。</p><p>cummins（Cummins）作为全球知名品牌，其柴油发电机组故障诊断技术结合了机械、电子和智能系统的综合陈述方式，能够快速定位问题并减少停机时间。</p></div><a href="http://www.gdkmsfdj.com/" target="_blank">http://www.gdkmsfdj.com</a>
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