CONTROL DEVICE OF AN ENGINE

摘要

To improve the controllability of the feedback control of the boost pressure, an ECU comprises a valve control part that feedback controls a boost pressure of a turbocharger based on a deviation between a target boost pressure and an actual boost pressure, and a determination part that determines whether or not the exhaust state in an exhaust passage can achieve the target boost pressure, and the feedback control includes at least an integral term, and when the determination part determines the exhaust state cannot achieve the target boost pressure, the valve control part reduces the influence of the deviation on the calculation of integral term compared with that when the exhaust state can achieve the target boost pressure.

主权项

1. A control system of an engine, the system comprising:
a turbocharger having a turbine that is provided to an exhaust passage and a compressor that is provided to an intake passage, a turbine bypass passage for diverting exhaust around the turbine, and a wastegate valve that is provided to the turbine bypass passage for controlling a flow rate of the exhaust flowing in the turbine bypass passage, a control device including:
a control part for feedback controlling a boost pressure of the turbocharger based on a deviation between a target boost pressure and an actual boost pressure, anda determination part for determining whether or not the exhaust state in the exhaust passage can achieve the target boost pressure, wherein the feedback control includes at least an integral term, and when the determination part determines that the exhaust state cannot achieve the target boost pressure, the control part controls an opening degree of the wastegate valve so as to reduce the influence of the deviation on the calculation of the integral term compared to that when the exhaust state can achieve the target boost pressure.