Patent ID: 7980990
Filing Date: 2011-07-19
Classification: B60K,B60L,B60W,Y02T,Y10S,Y10T

Abstract:
1. A power output apparatus that outputs power to a drive shaft, comprising: an internal combustion engine; a storage portion; an electric motor that receives and outputs power, and that exchanges electric power with the storage portion; a power split device that is connected to an output shaft of the internal combustion engine and the drive shaft, and that receives power from the output shaft and outputs the power to the drive shaft or receives power from the drive shaft and outputs the power to the output shaft while exchanging electric power with the storage portion and exchanging power with the internal combustion engine; a shifting portion that transfers power between a rotating shaft of the electric motor and the drive shaft while changing a speed ratio based on a rotational speed of the rotating shaft of the electric motor and a rotational speed of the drive shaft; a drive shaft rotational speed detection portion that detects the rotational speed of the drive shaft; a rotating shaft rotational speed detection portion that detects the rotational speed of the rotating shaft of the electric motor; a required drive power setting portion that sets a required drive power required for the drive shaft; and a control portion that controls the internal combustion engine, the power split device, the electric motor, and the shifting portion, wherein when there is no malfunction in either the drive shaft rotational speed detection portion or the rotating shaft rotational speed detection portion, the control portion changes the speed ratio in the shifting portion and performs an intermittent operation of the internal combustion engine so that a drive power corresponding to the required drive power is output to the drive shaft, and when a malfunction occurs in at least one of the drive shaft rotational speed detection portion and the rotating shaft rotational speed detection portion, the control portion limits at least one of the change in the speed ratio in the shifting portion, the intermittent operation of the internal combustion engine, and the output of the required drive power to the drive shaft so that a drive power that approximates the required drive power as closely as possible is output to the drive shaft.