公开(公告)号：US20180066549A1

公开(公告)日：2018-03-08

申请号：US15561594

申请日：2016-04-08

Applicant: DENSO CORPORATION

Inventor： Yoshifumi KISHIMOTO ,  Masatake SATO

IPC: F01L1/356 ,  B60R16/023 ,  H02P6/08 ,  H02P6/15 ,  H02P6/24

CPC classification number: F01L1/356 ,  B60R16/0232 ,  F01L1/344 ,  F01L2001/0537 ,  F01L2201/00 ,  F01L2250/02 ,  F01L2800/01 ,  F01L2810/03 ,  F01L2820/032 ,  F01L2820/041 ,  H02P6/08 ,  H02P6/153 ,  H02P6/157 ,  H02P6/24 ,  H02P2205/05

Abstract: A motor drive device for valve timing control of an internal combustion engine includes: a motor drive unit that controls a phase of a camshaft to drive a motor for controlling opening and closing operation of a valve; and a determination unit that determines whether a timing is to start up the motor or to normally drive the motor. The motor drive unit drives the motor with an advance angle when it is determined that the timing is to normally drive the motor by the determination unit, and the motor drive unit normally drives the motor without the advance angle when it is determined that the timing is to start up the motor.