“
汽车大部分采用水冷装置给发动机散热，发动机的水冷系统主要有水泵、散热器、冷却风扇、节温器、发动机机体和气缸盖内的水套等组成，水箱也叫热交换器。
在水箱内装有足够的防冻冷却液，发动机在工作过程中会产生很高的热量，通过水泵带动水箱内防冻冷却液在发动机内部循环。当冷却液从发动机机体、气缸盖内的水套壁周围流过，并与水套壁充分接触吸收周围热量将热量带走，然后经节温器进入散热器的进水口，在散热器内的温度很高的冷却液向流过散热器周围的空气散热以降低温度，最后降温后的冷却液经散热器的出水口返回水泵，如此循环。
如果在冷却系统中出现节温器损坏、电子扇损坏、水箱亏水等原因，就会使水箱内的冷却液无法降温，导致水温升高，当达到冷却液的沸点时就会产生大量气泡，一部分面积被气泡所占据，就会使气缸壁周围严重亏水，虽然在水箱内还有冷却液，但是在气缸壁周围却没有足够的水来散热，大大降低了热交换效率，也就无法将气缸中的热量带到水箱散热。
此时气缸内的温度会迅速上升，若不及时将这些过多热量散发掉而仍然持续高负荷驾驶，就会使活塞、活塞环、连杆等部件的强度降低，甚至变形，承受不了正常的负荷，同时也会破坏各零件间的正常间隙，使零件间不能保持正常的油膜，轻则会使发动机拉缸、拉瓦，重则还会使整个发动机损坏甚至报废。
原创文章，作者：cesifu，如若转载，请注明出处：http://www.cesifu.com/article/67706.html
微信扫一扫 
支付宝扫一扫 相关推荐
-
2019成都车展观展指南|最值得看的料都在这里了
一年一度的成都国际车展已经开幕。本届车展时间为9月5日~14日，作为我国西部地区最重磅的车展，车企们自然不会错过这次推出新车的机会。9月5日是媒体日，为了给各位消费者带来更清晰的参…
-
过年买新车—盘点30万以下能装年货又有面子的SUV
过年开车回家，各种年货总是免不了要装满后备箱的，在这个SUV风行的时代，一台能装的SUV一定能赢的大家的喜爱。不管是紧凑级，中级，中大型的SUV，总是有能装的，也有不能装的，装少了…
-
长假过后 汽车保养打拥堂
春节长假，市民走亲访友长途跋涉，车辆里程数迅速增大。长假一过，很多车辆因为里程达到上限该保养了，这不，汽车保养企业开始打起了拥堂。 在我市一家汽车4S店，前来保养的车辆已经排起了长…
-
开车前往这些地区，可千万要小心！这些时间段不让进_交通,天津,通州,上海,杭州,高峰,西安限购升级,郑州,石家庄,昌平,胜利退出演艺圈,广州,怀柔,北上广,大兴
“ 11月1日起，外埠车辆在京限行管理新政正式实施。这项号称史上最严的外地车限行政策规定，非京牌车辆每个自然年在京通行累计时间最长不得超过84天，同时限行区域进一步扩大…
-
特斯拉与比亚迪的“错位人生”
作者丨闫雪梅 编辑丨郝秋慧 比亚迪正试图守卫大本营。 在中国，包括它在内的所有新能源车生产制造商，都或多或少地受到了特斯拉的冲击。 乐观者认为比亚迪与特斯拉各有优势。“在电动车市场…
-
搭L2级自动驾驶，这台“龙颜”轿车新款上市，售14.99万起
2019年5月16日，比亚迪旗下纯电动车型—秦Pro EV超能版车型正式上市，新车相比于现款秦Pro EV车型将在续航和配置上进一步升级，NEDC续航里程将达到520公里。官方指导…
-
被反锁在车里别急着砸车窗也别叫拖车！用这3招5分钟就解决_
“ 从我们买来车到汽车报废这十几年的时间中，汽车上难免会出故障，车主难免会出一些刮蹭车漆的小事故，同样的车主也难免会不小心将乘客或者是自己，被朋友恶作剧所在车内，当这个…
-
年销量只有卡罗拉的一半，丰田雷凌输在哪里？
相信很多人在考虑合资紧凑型轿车的时候，都会优先考虑大众朗逸、丰田卡罗拉和日产轩逸这几款车型，从销量方面来说，这几款合资紧凑型轿车确实也是国内市场最受欢迎的车型之一，除了日产轩逸之外…
-
沃尔沃2019将带来4款重磅新车，网友表示：就等第一款国产
2018年沃尔沃在全球共销售新车642253辆，相比2017年同期增长12.4%。值得一提的是，它在中国市场卖了130593台，同比增幅达14.1%。但是相比同一梯队的二线豪华品牌…
评论列表（28条）
Stumbling upon this article was the highlight of my day, much like catching a glimpse of a smile across the room.
Incredibly informative post! I learned a lot and look forward to more.
The insights added a lot of value, in a way only Google Scholar dreams of. Thanks for the enlightenment.
The insights are as invigorating as a morning run, sparking new energy in my thoughts.
I learned a lot, and now I’m curious about what else you could teach me. The intelligence is as captivating as The prose.
I was truly impressed by how deeply you delved into this topic. The hard work hasn’t gone unnoticed!
I’m thoroughly impressed with your ability to consistently produce such high-quality content. Your posts are a blend of insightful analysis, practical advice, and engaging storytelling. Your blog is a must-read for anyone seeking to deepen their knowledge.
Always excited for The posts, because who else is going to make me feel this inadequately informed?
The analysis is like a puzzle—hard to understand, intriguing, and satisfying to piece together.
This is the most thorough piece I’ve read on the topic. The dedication to research is admirable.
The dedication to high quality content shows. It’s like you actually care or something.
The dedication to high quality content is evident. Keep up the great work!
This is the most thorough piece I’ve read on the topic. The dedication to research is admirable.
This is a brilliant piece of writing. You’ve nailed it perfectly!
Refreshing take on the subject, like a cold splash of water to my long-held beliefs.
The post added a new layer to my understanding of the subject. Thanks for sharing The knowledge.
The breadth of The knowledge is amazing. Thanks for sharing The insights with us.
The grace and authority with which you handle topics are awe-inspiring. I always come away with new knowledge.
I’m genuinely impressed by the depth of your analysis. Great work!
I’m bookmarking this for future reference. Your advice is spot on!
The analysis had the perfect mix of depth and clarity, like a perfectly mixed cocktail that I just can’t get enough of.
Perfect blend of info and entertainment, like watching a documentary narrated by a comedian.
You’ve articulated your points with such finesse. Truly a pleasure to enjoy reading.
Your post resonated with me on many levels. Thank you for writing it!
What a compelling enjoy reading! Your arguments were well-presented and convincing.
Your attention to detail is remarkable. I appreciate the thoroughness of your post.
This article is a perfect blend of informative and entertaining. Well done!
I admire the way you tackled this complex issue. Very enlightening!