Patent ID: 7457702

Claim:
An estimated torque calculation device that calculates an estimated torque of an internal combustion engine, comprising: a first torque calculation portion that calculates an output torque of the internal combustion engine as a first output torque based on a load of the internal combustion engine; a second torque calculation portion that calculates the output torque of the internal combustion engine as a second output torque based on a map in which a rotation speed of the internal combustion engine is a parameter; a numerical value calculation portion that calculates a numerical value based on a characteristic of a torque converter connected to the internal combustion engine; and a setting portion that sets one of the first output torque and the second output torque as the estimated torque based on the numerical value; wherein the numerical value calculation portion calculates a pump torque rotating an input shaft of the torque converter based on a torque capacity of the torque converter and the rotation speed of the internal combustion engine; wherein the setting portion compares the pump torque and the first output torque, and wherein if the pump torque is greater, the setting portion sets the first output torque as the estimated torque, and wherein if the pump torque is equal to or less than the first output torque, the setting portion sets the second output torque as the estimated torque.