公开(公告)号：US12018622B2

公开(公告)日：2024-06-25

申请号：US18011977

申请日：2021-06-23

Applicant: Hitachi Astemo, Ltd.

Inventor： Yuta Koike ,  Masayuki Saruwatari ,  Yuusuke Kihara ,  Akihiro Komori

IPC: F02D13/02 ,  F01L1/352 ,  F01L1/356 ,  F02D13/08

CPC classification number: F02D13/0238 ,  F01L1/352 ,  F01L1/356 ,  F02D13/02 ,  F02D13/08 ,  F01L2800/01 ,  F01L2800/03 ,  F01L2820/032

Abstract: An object of the present invention is to obtain a controller device for a variable valve timing apparatus capable of controlling a phase to an arbitrary fixed valve timing from immediately before an internal combustion engine stops until after the internal combustion engine has stopped. The controller device for the variable valve timing apparatus according to the present invention performs, during engine stop processing of the internal combustion engine, normal control of changing the relative rotational phase of a camshaft to a most advanced position or a most retarded position when the rotational speed of a crankshaft is equal to or more than a first threshold, and low-speed control of fixing a current or a voltage supplied to the motor to be constant to maintain the relative rotational phase of the camshaft at the most advanced position or the most retarded position in a period from when the rotational speed of the crankshaft is lower than the first threshold until the rotational speed becomes zero.