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.

柴油發(fā)動(dòng)機的功率提升主要靠的是增壓器，如果沒(méi)有以廢氣驅動(dòng)的渦輪增壓器為主的技術(shù)線(xiàn)路帶動(dòng)的話(huà)，功率提升就是一句空話(huà)，因為渦輪增壓的出現，才改變了排量決定動(dòng)力性能的歷史！現階段柴油發(fā)動(dòng)機的動(dòng)力性能調校就是增壓器與發(fā)動(dòng)機的性能匹配問(wèn)題。

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.

自拌混凝土攪拌車(chē)，廢氣渦輪增壓器是以發(fā)動(dòng)機燃燒產(chǎn)生的廢氣做動(dòng)力推動(dòng)增壓器的渦輪旋轉帶動(dòng)同軸另一端的壓氣機葉輪往進(jìn)氣管理打氣。說(shuō)白了廢氣渦輪增壓器就是一個(gè)利用排氣能量的氣泵往進(jìn)氣管力面打氣的一個(gè)部件，而排氣能量的大小取決于發(fā)動(dòng)機燒油的多少。

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.

自拌混凝土攪拌車(chē)，當油門(mén)小，轉速低的時(shí)候，渦輪增壓器基本上是不起作用的。這里要解釋一個(gè)名詞就是“渦輪介入轉速”就是指多少轉速渦輪增壓器才能開(kāi)始幫助發(fā)動(dòng)機出力。在此轉速之前發(fā)動(dòng)機基本上是相當于自然吸氣的，額定功率相同的發(fā)動(dòng)機排量越大則渦輪增壓器介入之前或剛剛介入時(shí)進(jìn)氣量會(huì )越多，發(fā)動(dòng)機對于增壓器的依賴(lài)性就越小，就可以匹配增壓小的渦輪增壓器，相應的小渦輪增壓器能夠更好的改善渦輪增壓器低速加速性能。

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.

自拌混凝土攪拌車(chē)，額定功率大而排量小一些的發(fā)動(dòng)機則低速瞬時(shí)加速性能肯定會(huì )差一些，這時(shí)對于增壓器與發(fā)動(dòng)機之間的匹配就有很大的挑戰性。要保證發(fā)動(dòng)機額定功率足夠大就必須用大渦輪增壓器，而大渦輪增壓器低速加速性能又不好，為了平衡二者的關(guān)系，所以就把渦輪介入轉速提前，介入轉速提前，相應的渦輪旁通泄壓閥打開(kāi)也會(huì )提前，以便更好的保護增壓器不會(huì )超轉速。但是不管采用什么樣的辦法，也只能部分改善它的低速性能，這一類(lèi)發(fā)動(dòng)機低速加速性能和低速油耗會(huì )比較差，額定功率輸出的經(jīng)濟性也還是差一些。因為在低速加速階段發(fā)動(dòng)機充氣系數是不足的，為了盡快提高發(fā)動(dòng)機和渦輪增壓器轉速必須盡量多給油，這就是渦輪增壓發(fā)動(dòng)機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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