发动机是一辆车的“心脏”，专用车中的
自动搅拌车的发动机都是以柴油为主的，随着科技的发展，柴油发动机的马力是越来越大，今天我们就来聊一聊关于搅拌车发动机功率大小事项。
The engine is the "heart" of a car. The engines of automatic mixers in special vehicles are mainly diesel fuel. With the development of science and technology, the power of the diesel engine is increasing. Today, we will talk about the power of the mixer engine.
柴油发动机的功率提升主要靠的是增压器，如果没有以废气驱动的涡轮增压器为主的技术线路带动的话，功率提升就是一句空话，因为涡轮增压的出现，才改变了排量决定动力性能的历史！现阶段柴油发动机的动力性能调校就是增压器与发动机的性能匹配问题。
The power increase of diesel engine mainly depends on the supercharger. If there is no technology line driven by exhaust gas driven turbocharger, the power increase is empty talk. Because the appearance of turbocharging has changed the history of displacement determining power performance! At present, the power performance tuning of diesel engine is the performance matching problem between supercharger and engine.
废气涡轮增压器是以发动机燃烧产生的废气做动力推动增压器的涡轮旋转带动同轴另一端的压气机叶轮往进气管理打气。说白了废气涡轮增压器就是一个利用排气能量的气泵往进气管力面打气的一个部件，而排气能量的大小取决于发动机烧油的多少。
The exhaust gas turbocharger uses the exhaust gas generated by the engine combustion as the power to drive the turbocharger turbine to rotate and drive the compressor impeller at the other end of the same axis to pump air into the intake management. To put it bluntly, the exhaust turbocharger is a component that uses the exhaust energy to pump air into the intake pipe force surface, and the amount of exhaust energy depends on how much oil the engine burns.
当油门小，转速低的时候，涡轮增压器基本上是不起作用的。这里要解释一个名词就是“涡轮介入转速”就是指多少转速涡轮增压器才能开始帮助发动机出力。在此转速之前发动机基本上是相当于自然吸气的，额定功率相同的发动机排量越大则涡轮增压器介入之前或刚刚介入时进气量会越多，发动机对于增压器的依赖性就越小，就可以匹配增压小的涡轮增压器，相应的小涡轮增压器能够更好的改善涡轮增压器低速加速性能。
When the accelerator is small and the speed is low, the turbocharger basically does not work. Here we need to explain that the term "turbine intervention speed" refers to the speed at which the turbocharger can start to help the engine output. Before this speed, the engine is basically equivalent to a naturally aspirated engine. The larger the engine displacement with the same rated power is, the more air intake will be before or just after the turbocharger intervention. The less the engine depends on the turbocharger, and the smaller the turbocharger can be matched. The corresponding small turbocharger can better improve the low speed acceleration performance of the turbocharger.
额定功率大而排量小一些的发动机则低速瞬时加速性能肯定会差一些，这时对于增压器与发动机之间的匹配就有很大的挑战性。要保证发动机额定功率足够大就须用大涡轮增压器，而大涡轮增压器低速加速性能又不好，为了平衡二者的关系，所以就把涡轮介入转速提前，介入转速提前，相应的涡轮旁通泄压阀打开也会提前，以便更好的保护增压器不会超转速。
The engine with higher rated power and smaller displacement will certainly have poorer transient acceleration performance at low speed, which is a great challenge for the matching between the supercharger and the engine. To ensure that the rated power of the engine is large enough, large turbochargers must be used, and the low speed acceleration performance of large turbochargers is not good. In order to balance the relationship between the two, the turbine intervention speed is advanced. The intervention speed is advanced, and the opening of the corresponding turbine bypass relief valve will also be advanced, so as to better protect the turbocharger from overspeed.
但是不管采用什么样的办法，也只能部分改善它的低速性能，这一类发动机低速加速性能和低速油耗会比较差，额定功率输出的经济性也还是差一些。因为在低速加速阶段发动机充气系数是不足的，为了尽快提高发动机和涡轮增压器转速须尽量多给油，这就是涡轮增压发动机低速加速油耗大的原因。
However, no matter what method is adopted, it can only partially improve its low-speed performance. This kind of engine has poor low-speed acceleration performance and low speed fuel consumption, and the economy of rated power output is still poor. Because the engine inflation coefficient is insufficient in the low speed acceleration phase, in order to improve the engine and turbocharger speed as soon as possible, more fuel must be supplied, which is the reason why the turbocharged engine has high fuel consumption during low speed acceleration.
That's all for the analysis on the use of mixer engine power. If you have any ideas or needs, please come to our website http://www.jfhntjbj.com Consult and understand!
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