公开(公告)号：US10329971B2

公开(公告)日：2019-06-25

申请号：US15451706

申请日：2017-03-07

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Douglas R Verner ,  Scot A Douglas ,  Joseph J Moon ,  Alexander Doss

IPC: F01L13/00

Abstract: A system and method for sensing a camshaft barrel position of a sliding camshaft includes at least one sliding camshaft having at least one camshaft barrel and at least one position shifting slot disposed in the at least one camshaft barrel. At least one actuator is provided for engaging the at least one position shifting slot on the rotating sliding camshaft and shifting position of the at least one camshaft barrel and at least one sensor is provided for detecting the shifted position of the at least one camshaft barrel wherein the camshaft barrel includes position identifying features.

公开(公告)号：US10280847B2

公开(公告)日：2019-05-07

申请号：US15472408

申请日：2017-03-29

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Scot A Douglas ,  Douglas R Verner

IPC: F01L1/34 ,  F02D13/02 ,  F01L13/00 ,  F01L1/053 ,  F01L1/18

Abstract: A method for retracting a partially extended pin of a sliding camshaft actuator having first and second pins being selectively actuatable by adjacent first and second magnetic field generating coils includes determining if the first or the second pin is partially extended after engine ignition. A partially extended first pin is retracted with flux linkage created by the second magnetic field generating coil being coupled unto the first magnetic field generating coil, and a partially extended second pin is retracted with flux linkage created by the first magnetic field generating coil being coupled unto the second magnetic field generating coil.

公开(公告)号：US10301981B2

公开(公告)日：2019-05-28

申请号：US15475654

申请日：2017-03-31

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Douglas R Verner ,  Scot A Douglas

IPC: F01L1/34 ,  F01L13/00

Abstract: A method for retracting an extended pin of a sliding camshaft actuator wherein the actuator includes a magnetic field generating coil, a magnetic piston in connection with the extended pin operable to be actuated by the magnetic field generating coil, and a pin stop plate. The method comprises creating an air gap between the magnetic piston and the pin stop plate and reversing voltage on the magnetic field generating coil to retract the extended pin.

公开(公告)号：US10316777B2

公开(公告)日：2019-06-11

申请号：US15483289

申请日：2017-04-10

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Douglas R. Verner ,  Scot A Douglas

IPC: F01L13/00 ,  F02D41/06 ,  H05B6/10 ,  F02D41/20 ,  H01F7/16 ,  H01F7/18 ,  F02D13/02 ,  F02D41/00

Abstract: A method for heating a sliding camshaft actuator at cold engine start wherein the sliding camshaft actuator includes at least one magnetic field generating coil having a core, a piston armature disposed in the core of the at least one magnetic field generating coil, a magnet in mechanical communication with the piston armature, and an actuator pin in mechanical communication with the magnet. The method includes detecting a cold engine start condition and reversing an energizing voltage on the at least one magnetic field generating coil when the outside temperature is below a predetermined temperature threshold. The reverse energizing voltage on the at least one magnetic field generating coil is maintained for a predetermined period of time to heat the piston armature, the magnet, and the actuator pin.