公开(公告)号：US20180340484A1

公开(公告)日：2018-11-29

申请号：US15603794

申请日：2017-05-24

Applicant: GM Global Technology Operations LLC

Inventor： Etsuko Stewart ,  Timothy P. Philippart ,  Scott T. Feldmann ,  Zhong Li

IPC: F02D41/22 ,  F01L13/00

Abstract: A method is provided for operating a three step camshaft system during engine position sensor fault conditions. The three step camshaft has multiple cam actuators each having an actuator pin. The method includes: disposing multiple camshaft barrels on a camshaft, each barrel having a slot receiving the actuator pin of a cam actuator during camshaft barrel rotation axially displacing each camshaft barrel to a high lift lobe position, a low lift lobe position and an active fuel management (AFM) lobe position; determining if an engine position sensor is in a fault condition; identifying if the fault condition occurs simultaneously with any of the camshaft barrels positioned in the AFM lobe position; energizing selected cam actuators in communication with the camshaft barrels positioned in the AFM lobe position to axially displace the camshaft barrel away from the AFM lobe position and to the low lift lobe position.

公开(公告)号：US20180057007A1

公开(公告)日：2018-03-01

申请号：US15251645

申请日：2016-08-30

Applicant: GM Global Technology Operations LLC

Inventor： Chad D. Kromrey ,  Zhong Li ,  Nigel K. Hyatt ,  Andrew J. Harkenrider

IPC: B60W30/188 ,  F02D17/02 ,  F02D41/10 ,  F02D41/00 ,  F02D41/30 ,  B60W10/10 ,  B60W10/06

CPC classification number: B60W30/1882 ,  B60W10/06 ,  B60W10/10 ,  B60W2510/0604 ,  B60W2510/0609 ,  B60W2510/0657 ,  B60W2540/10 ,  B60W2540/106 ,  B60W2710/0622 ,  B60W2710/0644 ,  B60W2710/0666 ,  B60W2710/0672 ,  F02D17/02 ,  F02D41/0002 ,  F02D41/0087 ,  F02D41/10 ,  F02D41/3005 ,  F02D2250/18 ,  F02D2250/21

Abstract: A method for operating an internal combustion engine comprises providing a vehicle having an internal combustion gasoline engine including multiple cylinders and wherein the engine is operating in a deactivated cylinder mode, receiving a torque request if a cylinder reactivation torque smoothing mode is active, setting a variable torque ratio to 1.0 if the torque request is greater than a fast exit threshold torque, setting the variable torque ratio to 0.0 if the torque request is less than a slow exit threshold torque, setting the variable torque ratio to a value between 0.0 and 1.0 if the torque request is between the fast exit threshold torque and slow exit threshold torque, and calculating a component of final engine output torque.

公开(公告)号：US10183672B2

公开(公告)日：2019-01-22

申请号：US15251645

申请日：2016-08-30

Applicant: GM Global Technology Operations LLC

Inventor： Chad D. Kromrey ,  Zhong Li ,  Nigel K. Hyatt ,  Andrew J. Harkenrider

IPC: B60W10/06 ,  B60W30/188 ,  B60W10/10 ,  F02D17/02 ,  F02D41/00 ,  F02D41/10 ,  F02D41/30

Abstract: A method for operating an internal combustion engine comprises providing a vehicle having an internal combustion gasoline engine including multiple cylinders and wherein the engine is operating in a deactivated cylinder mode, receiving a torque request if a cylinder reactivation torque smoothing mode is active, setting a variable torque ratio to 1.0 if the torque request is greater than a fast exit threshold torque, setting the variable torque ratio to 0.0 if the torque request is less than a slow exit threshold torque, setting the variable torque ratio to a value between 0.0 and 1.0 if the torque request is between the fast exit threshold torque and slow exit threshold torque, and calculating a component of final engine output torque.

公开(公告)号：US20190135287A1

公开(公告)日：2019-05-09

申请号：US16241179

申请日：2019-01-07

Applicant: GM Global Technology Operations LLC

Inventor： Chad D. Kromrey ,  Zhong Li ,  Nigel K. Hyatt ,  Andrew J. Harkenrider

IPC: B60W30/188 ,  B60W10/06 ,  F02D41/10 ,  F02D17/02 ,  B60W10/10 ,  F02D41/00 ,  F02D41/30

Abstract: A method for operating an internal combustion engine comprises providing a vehicle having an internal combustion gasoline engine including multiple cylinders and wherein the engine is operating in a deactivated cylinder mode, receiving a torque request if a cylinder reactivation torque smoothing mode is active, setting a variable torque ratio to 1.0 if the torque request is greater than a fast exit threshold torque, setting the variable torque ratio to 0.0 if the torque request is less than a slow exit threshold torque, setting the variable torque ratio to a value between 0.0 and 1.0 if the torque request is between the fast exit threshold torque and slow exit threshold torque, and calculating a component of final engine output torque.

公开(公告)号：US10480444B2

公开(公告)日：2019-11-19

申请号：US15603794

申请日：2017-05-24

Applicant: GM Global Technology Operations LLC

Inventor： Etsuko Stewart ,  Timothy P. Philippart ,  Scott T. Feldmann ,  Zhong Li

IPC: F01L1/14 ,  F02D41/22 ,  F01L13/00

Abstract: A method is provided for operating a three step camshaft system during engine position sensor fault conditions. The three step camshaft has multiple cam actuators each having an actuator pin. The method includes: disposing multiple camshaft barrels on a camshaft, each barrel having a slot receiving the actuator pin of a cam actuator during camshaft barrel rotation axially displacing each camshaft barrel to a high lift lobe position, a low lift lobe position and an active fuel management (AFM) lobe position; determining if an engine position sensor is in a fault condition; identifying if the fault condition occurs simultaneously with any of the camshaft barrels positioned in the AFM lobe position; energizing selected cam actuators in communication with the camshaft barrels positioned in the AFM lobe position to axially displace the camshaft barrel away from the AFM lobe position and to the low lift lobe position.