Patent ID: 9744960
Date: 2017-08-29
CPC Classifications: B60K,B60L,B60W,B60Y,Y02E,Y02T,Y04S,Y10S

Claim:
1. A control system for a plug-in hybrid vehicle having a drive system including a starter motor, an engine, and a motor/generator, and a power supply system including a high voltage battery representing a power supply of the motor/generator, a capacitor representing a power supply of the starter motor, and a capacitor charge and discharge control unit that controls charge and discharge of the capacitor, the control system comprising: an engine start control unit configured to crank the engine for start-up using the starter motor powered by the capacitor; and a running mode selection controller configured to select a charge depleting (CD) mode in which electrical vehicle (EV) running is performed by consuming power of the high voltage battery when a charge capacity of the high voltage battery is greater than or equal to a threshold value and to select a charge sustain (CS) mode in which hybrid vehicle (HEV) running is performed by maintaining the charge capacity of the high voltage battery when the charge capacity of the high voltage battery is less than the threshold value, the capacitor charge and discharge control unit being configured such that, at a time of ignition on with the CD mode being selected, a capacitor voltage is maintained at or above a starter start-up permission voltage, and, when the CS mode is selected, the capacitor voltage is maintained at or below a deterioration-free voltage at which deterioration does not proceed.