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The Characteristic Conclusion Of Diesel Engine

ZICHAI POWER CO ., LTD | Updated: Sep 22, 2017

     As long as you understand the characteristics of both diesel and gasoline fuels, it is natural to conclude that for a diesel engine, the compression ratio is much higher than that of a petrol engine, whether it is a turbo-engine or a natural air suction. Generally, the compression ratio of petrol engines is about 10, even if the compression ratio of FSI is only close to 11, and the compression ratio of diesel engine is usually 19, high or even more than 20. The reason is that diesel has better blast resistance than gasoline.Diesel Engine

     In other words, diesel is more difficult to ignite than gasoline, and the combustion rate is much slower than gasoline, so the nature is more stable. Then, a higher compression ratio is required to allow diesel fuel to be compressed in a high-pressure environment. In addition, the fuel supply of diesel engines differs greatly from that of petrol engines.Diesel Engine

     Gasoline engine fuel is often sprayed into the intake manifold, that is, the suction cylinder is already mixed gas, if the temperature pressure in the cylinder is too large to allow the mixture to burn in advance, the use of the engine is often high-pressure injection, for TDI use of the engine, the use of direct injection cylinder, So the piston is only sprayed into the fuel at the end, and then the explosion resistance itself has been very good, then the compression of the engine than the natural gasoline engine can improve a lot.Diesel Engine

     Under the temperature combustion, the diesel engine introduces the supercharged technology to be much easier than the petrol engine. Compressed air intake can further improve the efficiency of diesel engines, in fact, before Porsche developed the VTG technology, the variable-wing turbocharger has been used on diesel engines.Diesel Engine


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