Drive force distribution device and method for distributing drive force

摘要

An IG-off-timer (20) measures the time t_off from when an engine (2) is stopped, or an ignition is turned off. An ECU (12) sequentially memorizes an estimated temperature of each of heat generating portions (3, 8, 11) as a memorized temperature Hm. Immediately after the engine (2) is restarted, the ECU (12) sets an initial value (H0) of the estimated temperature of each heat generating portion in such a manner that the initial value (H0) reflects a temperature drop of the heat generating portion in the deactivation period of the engine (2). The temperature of the heat generating portion is thus accurately estimated even after re-starting of the engine (2). The heat generating portions are thus appropriately protected (Fig. 1).