MODELING AND CONTROL OP SOLENOID VALVES FOR INTERNAL COMBUSTION ENGINES

摘要

This paper considers the modeling and control of solenoid valve actuators used for gas exchange in internal combustion engines. Solenoid valves are an emerging technology which offers performance benefits over traditional camshaft based valve timing. Maintaining the impact velocity of the armature and valve is a primary performance requirement in order to minimize acoustic noise and mechanical wear. To control this velocity, the finite element method (FEM) is used to generate static force and flux data which is validated experimentally. A flatness-based control provides linear tracking error dynamics assuming current control. A reduced-order nonlinear velocity/disturbance observer ensures linear estimate error dynamics for constant force disturbances. The estimated state feedback is simulated using the FEM model flux and force data and acceptable impact velocity and acceleration are achieved in face of model uncertainty disturbance.