HYBRID ELECTRIC VEHICLE CONTROLLER

摘要

PROBLEM TO BE SOLVED: To improve fuel economy while improving the durability of a power division mechanism that functions as a speed reducer when a first motor is used as a driving force source for traveling.SOLUTION: Even when an estimated value of a pinion temperature Tp_est reaches an upper limit temperature Tp_th, a controller permits a two-motor mode (step S16) until duration time Time_ON at that time reaches reference time τon (step S17). Even if the pinion temperature Tp_est falls and the estimated value thereof does not fall down to a permissible temperature Tpb, the controller permits the two-motor mode when duration time Time_OFF in a state where the two-motor mode is not executed reaches reference time τoff.SELECTED DRAWING: Figure 1