CONTROLLING DEVICE OF INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To estimate a friction torque of an internal combustion engine with high precision. SOLUTION: This device comprises a storage means for storing a standard friction characteristic determining a relationship between a predetermined parameter and a friction torque of an engine; an angle acceleration calculating means for finding a crank angle acceleration under a condition that torque generation due to combustion is stopped; a loss torque calculation means for finding a dynamic loss torque Tacbased on the crank angle acceleration and an inertia moment J of the engine; an actual friction torque calculation means for finding an actual friction torque Tfwgenerated in the engine based on the dynamic loss torque Tac; and a correction friction torque fetching means for fetching the correction friction torque based on the actual friction torque Tfwand the standard friction torque characteristic. COPYRIGHT: (C)2004,JPO