Research on In-Cylinder Pressure Monitoring Method of Diesel Engine Based on LSTM

The variation in in-cylinder pressure of diesel engine directly determines its working performance; therefore, the real-time monitoring technology for in-cylinder pressure of diesel engine is of great significance for monitoring the operation status of diesel engine. However, restricted by factors such as technology and cost, it is often impossible to monitor the in-cylinder pressure data of diesel engine during actual operation. To solve the above problem, this paper proposes an in-cylinder pressure curve monitoring model for diesel engine based on GRU (Gated Recurrent Unit), using easily collectible data signals such as crankshaft torque, crankshaft angle, and displacement of each cylinder as the basis. The correctness and accuracy of the above monitoring model are trained and verified using data obtained from bench tests, and a comparison is made with the commonly used in-cylinder pressure monitoring method based on simulation model. The results show that the diesel engine in-cylinder pressure monitoring model proposed in this paper has advantages such as high monitoring accuracy and fast calculation speed.