Torque calculation method for engine

摘要

A torque calculation method for an engine (100) connected to an automatic transmission (300), characterized by comprising:
calculating first engine torque based on a rotational speed of the engine (100);
detecting friction torque of the engine (100) based on a temperature of coolant of the engine (100);
calculating second engine torque that is used for control of the automatic transmission (300) by subtracting the friction torque from the first engine torque; and
correcting the second engine torque so that the second engine torque is increased based on a temperature of lubricant of the engine (100).