公开(公告)号：US10344734B2

公开(公告)日：2019-07-09

申请号：US15637507

申请日：2017-06-29

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Timothy P Philippart ,  Douglas R Verner ,  Dimitri Karatsinides ,  Timothy Karnjate

IPC: F02P7/077 ,  F01L1/25 ,  F02D41/22 ,  F01L13/00 ,  F02B77/08 ,  F02D41/00

Abstract: A method of determining a sliding camshaft actuator pin position based on engine crankshaft angle includes commanding a sliding camshaft actuator to perform a valve step shift, and monitoring an actuator's pin position during the valve step shift command. At least one crank angle is measured when the actuator pin position reaches or exceeds at least one predetermined pin position threshold and at least one remedial action is performed when the actuator pin position does not correlate to the at least one measured crank angle.

公开(公告)号：US20190003446A1

公开(公告)日：2019-01-03

申请号：US15637507

申请日：2017-06-29

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Timothy P. Philippart ,  Douglas R. Verner ,  Dimitri Karatsinides ,  Timothy Karnjate

IPC: F02P7/077 ,  F02B77/08 ,  F01L1/25

CPC classification number: F02P7/0775 ,  F01L1/25 ,  F01L13/0036 ,  F01L2013/0052 ,  F01L2013/113 ,  F01L2800/14 ,  F01L2820/031 ,  F01L2820/041 ,  F02B77/082 ,  F02D41/009 ,  F02D41/22

Abstract: A method of determining a sliding camshaft actuator pin position based on engine crankshaft angle includes commanding a sliding camshaft actuator to perform a valve step shift, and monitoring an actuator's pin position during the valve step shift command. At least one crank angle is measured when the actuator pin position reaches or exceeds at least one predetermined pin position threshold and at least one remedial action is performed when the actuator pin position does not correlate to the at least one measured crank angle.