As a new automobile technology, engine FSI is still in the development stage. It is superior to other engines of BII in economy, power and environmental protection. However, there are still some shortcomings in operability. For example, the principle of direct injection gasoline engine is characterized by two different fuel injection modes, and the driver can constantly switch back and forth between stratified fuel injection and uniform fuel injection. But this will have an impact on the life of the car and the simplicity of operation. I think the future engine will develop towards electrification. So that the engine can ensure the best economy and power under all working conditions.