Which is better, direct injection or multi-point injection?

In fact, direct injection and multi-point injection in automobiles are completely different. In multi-point injection, manifold injection is adopted, while direct injection means that gasoline is directly gasified through the fuel nozzle and injected into the cylinder of the automobile. These two ways of working have their own advantages and disadvantages. In terms of power performance, I think the direct injection engine should perform better. Take the Fit engine as an example, which is also a 1.5 liter engine. The maximum horsepower of the Fit direct injection engine can reach 130 horsepower, while the same second-generation Fit 1.5-liter engine can only reach 120 horsepower, which is 10 horsepower higher than the old model, so it is very obvious in power improvement.

However, the direct injection engine also has a great disadvantage, that is, the direct injection engine is prone to a series of faults such as carbon deposition. Driving in the city, you will find that the engine speed is kept at a relatively low level for a long time, so the gasoline is not particularly sufficient to burn. After a long time, you will find that the performance of direct injection engine is not as good as that of manifold injection engine (the third generation Fit is an example).

In fact, multi-point injection engines have been developed for a long time. Although the performance of multi-point injection engine is indeed a little worse than that of direct injection, it is more reliable and durable, and the performance of EFI is better, and I think multi-point injection engine has better performance in carbon deposition. However, some aircraft models have adopted the working strategy of combining two injection modes. Multi-point injection is mostly used at low speed, and direct injection is used to do work when power is needed at high speed.