OIL PUMP CONTROL SYSTEM FOR A PHEV AND AN INITIAL DRIVING METHOD THEREOF, CAPABLE OF REDUCING LOADS ON THE OIL PUMP BY SOFTLY STARTING A MOTOR

摘要

PURPOSE: An oil pump control system for a PHEV(Plug In Hybrid Electric Vehicle) and an initial driving method thereof are provided to reduce loads on the oil pump by setting the initial driving duty of a motor according to the temperature of transmission oil.;CONSTITUTION: An oil pump control system(20) for a PHEV(Plug In Hybrid Electric Vehicle) comprises a power supply unit(21), a motor driving unit(22), a communication unit(23), an oil temperature sensing unit(26), and a control unit(24). The power supply unit supplies driving power to an oil pump driving motor(11) by receiving the power supplied from a high voltage battery(12) and battery(13). The motor driving unit switches the driving power to operate the motor. The communication unit communicates with a main control unit(14). The oil temperature sensing unit delivers the temperature of transmission oil to the main control unit. The control unit controls the motor on the basis of the temperature of the oil. If the temperature of the oil is above the pre-set initial temperature, the control unit outputs a PWM(Pulse Width Modulation) control signal set at a pre-set first duty value. If the temperature of the oil is below, the control unit outputs the PWM(Pulse Width Modulation) control signal set at a pre-set second duty value which is higher than the first duty value.;COPYRIGHT KIPO 2013;[Reference numerals] (11) Motor; (12) High voltage battery; (13) Battery; (14) Main control unit; (15) Hole sensor; (21) Power supply unit; (22) Motor driving unit; (23) Communication unit; (24) Control unit; (25) Memory; (26) Oil temperature sensing unit