The engine is the "heart" of a car. The engine of self mixing concrete mixer in special vehicles is mainly diesel. With the development of science and technology, the horsepower of diesel engine is increasing. Let's talk about the 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 improvement of diesel engine mainly depends on the turbocharger. If it is not driven by the technology of exhaust driven turbocharger, the power improvement is empty talk, because the emergence of turbocharging has changed the history that the displacement determines the power performance! At present, the dynamic performance adjustment of diesel engine is the matching problem between turbocharger and engine.
自拌混凝土搅拌车，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。
In the self mixing concrete mixer, the exhaust gas turbocharger is driven by the exhaust gas generated by the engine combustion to drive the turbine of the turbocharger to rotate and drive the compressor impeller at the other end of the coaxial shaft to pump air into the intake management. To put it bluntly, the exhaust gas turbocharger is a component that uses the exhaust energy to pump air to the force surface of the intake pipe, and the amount of exhaust energy depends on how much oil the engine burns.
自拌混凝土搅拌车，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。
Self mixing concrete mixer, when the throttle is small, low speed, the turbocharger basically does not work. Here to explain a term is "turbine speed" refers to how much speed turbocharger can start to help engine output. Before this speed, the engine is basically equivalent to naturally aspirated. The larger the displacement of the engine with the same rated power, the more the intake air will be before or just after the intervention of the turbocharger. The less the dependence of the engine on the turbocharger, the smaller the turbocharger can be matched. The corresponding small turbocharger can better improve the low-speed acceleration of the turbocharger Yes.
自拌混凝土搅拌车，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必须用大涡轮增压器，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。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必须尽量多给油，这就是涡轮增压发动机低速加速油耗大的原因
For self mixing concrete mixer, the engine with large rated power and small displacement will have poor low speed instantaneous acceleration performance, which is a great challenge for the matching between supercharger and engine. In order to ensure that the rated power of the engine is large enough, the large turbocharger must be used, and the low-speed acceleration performance of the large turbocharger 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 is also advanced, so as to better protect the turbocharger from over speed. However, no matter what method is adopted, it can only partially improve its low-speed performance. The low-speed acceleration performance and low-speed fuel consumption of this kind of engine will be poor, and the economy of rated power output will be poor. In order to improve the speed of engine and turbocharger as soon as possible, it is necessary to supply as much fuel as possible, which is the reason why the fuel consumption of turbocharged engine is high at low speed acceleration
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