TRAVEL ENVIRONMENT ESTIMATION DEVICE AND TRAVEL ENVIRONMENT ESTIMATION METHOD

摘要

An acquisition unit (710) acquires a torque instruction value (T) which reflects with good precision the torque of a drive wheel of a vehicle (MV) while traveling and a rotation speed (omega) of the drive wheel of the vehicle (MV) while traveling. Thereafter, the acquisition unit (710) acquires, on the basis of the acquired rotation speed (omega), a travel speed (vV) and a travel acceleration (a) of the vehicle (MV). On the basis of the torque instruction (T) and the rotation speed (omega) which are transmitted from the acquisition unit (710), a drive force computation unit (730) computes a drive force (Fd) using a drive force observer technique. An air resistance computation unit (740) computes an air resistance (Ra) by subtracting from the drive force (Fd) which is computed by the drive force computation unit (730) travel resistance components other than the air resistance (Ra) such as an acceleration travel component and an internal resistance component of the vehicle (MV). As a result, air resistance is estimated simply and with good precision without using a result of a detection by a sensor which is not commonly mounted in a vehicle.