Research on Rail Pressure Control of High-Pressure Common Rail System for Marine Diesel Engine Based on Controlled Object Model

The common rail pressure of a marine diesel engine high-pressure system is typically controlled by PID (Proportional Integral Differential) algorithm, which has problems with both overshoot and response delay. In this paper, the control method based on object model for studied. established within controller. Through developed current actual obtained real-time acquisition, variables issued controller to are predicted calculated. fuel supply required in whole calculated advance, then taken as input value driving order calculate PWM signal oil pump. A used proportional valve opening pump, pipe. verify correctness effects strategy model, simulation been combining calculation equations MAP data query, ensures performance. At same time, shows that error between simulation’s test less than 5%, thus accuracy guaranteed. combined function, effect compared control. Comprehensive verification can significantly improve delay