Simulation of CNG/ Gasoline Engine Speed Controller Based on MATLAB

The studies of CNG/gasoline dual-fuel engine system model are relatively few. The design deficiencies of CNG/gasoline dual-fuel engine speed controller exist. In this paper, the design and simulation of CNG/gasoline engine speed controller based on Matlab were put forward. On the basis of reasonable CNG engine model, the digital PID speed controller and adaptive fuzzy PID speed controller model were built respectively using Simulink platform. By tuning PID parameters and correcting fuzzy rules, the optimal results of controller parameters were obtained. The simulation results shown that the engine could be greatly improved by using the adaptive fuzzy PID controller on the CNG engine speed control modules. The speed control overshoot, steady time and steady-state error were significantly improved, among them, overshoot reduced 20%, steady state time reduced 4s, and steady-state error reduced 15 percent. The adaptive fuzzy PID speed controller improved the CNG/gasoline dual-fuel engine control performance, which has higher value of practice and application. Keywords— CNG/gasoline engine Simulink model PID adaptive fuzzy PID speed controller