公开(公告)号：US20210062690A1

公开(公告)日：2021-03-04

申请号：US16553437

申请日：2019-08-28

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Etsuko M. STEWART ,  Scott T. Feldmann ,  Pratap S. Murthy

IPC: F01L9/04 ,  F02N11/08 ,  H02P9/00 ,  F01L1/34

Abstract: A control system of a vehicle includes: an electric motor configured to phase rotation of an camshaft of an engine relative to rotation of a crankshaft of the engine; a current module configured to, while the engine is off: selectively transition a current signal back and forth between a first state and a second state; and a motor driver module configured to, while the engine is off: apply power to the electric motor from a battery and adjust a position of the camshaft toward a predetermined position when the current signal is in the first state; and disconnect the electric motor from the battery and allow the position of the camshaft to move away from the predetermined position when the current signal is in the second state.