FAHRANTRIEBSVORRICHTUNG FÜR EIN NUTZFAHRZEUG

摘要

In case a temperature (T) of a lubricant oil (G) cannot be detected by an oil temperature sensor (51) provided on an output side of a lubricant pump (46), the temperature (Tm) of a wheel drive motor (17) is detected by using a motor temperature sensor (53) provided on the wheel drive motor (17). By estimating the temperature (T) of the lubricant oil (G) from the temperature (Tm) of the wheel drive motor (17), monitoring is carried out as to whether or not the temperature (Tm) has risen to a predetermined temperature (Tms) at which the cooling of the lubricant oil (G) by forced circulation is deemed necessary. The drive of a lubricant pump (46) by a pump drive motor (47) is stopped until the motor temperature (Tm) rises to a level exceeding the predetermined temperature (Tms). Meanwhile, when the motor temperature (Tm) reaches the predetermined temperature (Tms) or higher, the lubricant pump (46) is started. In consequence, at the time of starting the vehicle operation, the lubricant pump (46) can be controlled in accordance with not the temperature (T) of the lubricant oil (G) but the temperature (Tm) of the wheel drive motor (17).