Torque estimation device

A torque estimation device comprising:

• a storage device that stores data of a trained neural network, in which a neural network is trained, using training data including:
• data of an actually-measured torque that is measured,
• data of an accelerator operation amount in a period of a predetermined length up to a time point of measurement of the actually-measured torque, and
• data of an acceleration of a vehicle from the time point of measurement of the actually-measured torque onward until a later time point,
• wherein the neural network is trained using the training data to estimate a torque generated in a power transmission member that transmits a driving force from a driving force source mounted on the vehicle to a drive wheel based on input data including the data of the accelerator operation amount in the period of the predetermined length and the data of the acceleration of the vehicle;
• and
• a processing circuit that executes an estimation process of inputting, to the trained neural network stored in the storage device, the input data including the data of the accelerator operation amount in the period of the predetermined length and the data of the acceleration of the vehicle to estimate the torque generated in the power transmission member.