第一千七十四章 内燃机
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崇祯二十七年三月初四，李植看着苏老三摆弄的机器，有些欣喜。最新地址ltxsba.pw
苏老三是范家庄最好的蒸汽机匠人，当初李植试制蒸汽机时候苏老三就在旁边帮忙。后来李植制造蒸汽机车，苏老三又是工匠长。再后来李植不断改进蒸汽机车，苏老三是机车厂厂长。经过这些年的不断研究，苏老三已经成为蒸汽机领域的能人。
内燃机虽然和蒸汽机原理不同，但在构造上却有相同的地方。李植这次试制内燃机，还是把任务交给了苏老三。
起初李植听说苏老三把自己设计的内燃机做出来，还有些不相信。毕竟从电力机床开始正式使用到现在只有六个月，内燃机制造的条件也只是刚刚成熟。而内燃机作为一种全新的产品，一旦成功其效果效果将是革命性的。
但看到苏老三安置在桌子上的机器，李植觉得苏老三确实取得了很大的进展。
那是一台颇大的机器，远比后世的汽车发动机更大一些。李植虽然能画出后世发动机的结构图，但这个时代的材料和工艺却无法完全复制后世的精密机械。实际做出来的机器比较大，长宽都超过一米五，机器上布满了复杂的管道。
苏老三欣喜地说道：“王爷，这是我们制作出来的第一台内燃机。王爷你画的设计图很精妙，但是一些零件我们现有的工艺水平做不出来。所以我们只能采取退而求其次的方法，采用折衷的方式用土法尽量实现设计图上各个零件的功能。”
苏老三介绍道：“不过整体来说，整台机器还是实现了正常运转，能够对外输出转力。”
李植点了点头。
站在一边的曹余忍不住好奇，问道：“王爷，这蒸汽机和内燃机，究竟有什么区别呢？”
苏老三说道：“大总管，这蒸汽机和内燃机最根本的区别就是，蒸汽机是在发动机外部燃烧燃料产生蒸汽，利用蒸汽驱动机器。而内燃机却直接利用燃料在汽缸内燃烧，利用燃料燃烧后高温膨胀产生的压力直接驱动机器。”
曹余点头说道：“我明白了，蒸汽机是烧煤的，内燃机是烧汽油的。”
苏老三笑道：“大总管，蒸汽机也不全是烧煤的。我们坦克使用的蒸汽机就是烧汽油的。蒸汽机只要得到热量就可以了，烧什么燃料都不重要。”
曹余想了想，问道：“那这么说起来，内燃机需要更高的压力了？”
苏老三摇头说道：“大总管，那也不是。我们的蒸汽机现在也是高压蒸汽机，内部压力也很高。内燃机刚刚研制出来，目前汽缸内部的压力实际上还没有我们成熟的蒸汽机高。”
曹余听到这里沉吟不语，不再多问。
李植点了点头，问道：“这内燃机四冲程的整体结构没有改变吧？”
苏老三大声说道：“没有改变。王爷。”
旁边的蔡怀水看了看李植的脸色，却忍不住问道：“王爷，何谓四冲程？”
苏老三说道：“所谓四冲程，就是整台内燃机的运转分为四个阶段。首先是进气冲程：活塞落下，将汽油和空气的混合物体吸入，通过进气门注入汽缸。然后是压缩冲程：升起的活塞将汽缸入口挤压关闭，同时将燃料和空气的混合物压缩。接下来是点火冲程：接近压缩冲程顶点时的燃料和空气之混合物体被火花塞点燃，将活塞推下。最后是排气冲程：活塞升起，将燃烧过的废气通过排气门排出气缸。”
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