Patent ID: 6625985
Filing Date: 2003-09-30
Classification: F02B,F02D,F02M,Y02T

Abstract:
A control device for a turbocharger of an engine, the turbocharger comprising exhaust gas turbine driven by an exhaust gas of the engine, a compressor which supplies fresh air to the engine under a supercharging pressure according to a rotation of the exhaust gas turbine, and a mechanism which adjusts a flowpath cross-sectional area of the exhaust gas led to the exhaust gas turbine, the control device comprising:a sensor which detects a running state of the engine; a sensor which detects an intake air amount of the engine; and a controller functioning to: set an open loop control value of the flowpath cross-sectional area based on the running state, set a target intake air amount of the engine based on the running state; calculate a processing value wherein predetermined smoothing is performed on the target intake air amount; calculate a feedback correction amount which makes the intake air amount coincide with the processing value; and control the exhaust gas flowpath cross-sectional area of the mechanism based on the open loop control value and feedback correction amount.