US 12,222,034 B1
Shift control method for vehicle powertrain
Sang Chul Lee, Seoul (KR)
Assigned to HYUNDAI MOTOR COMPANY, Seoul (KR); and KIA CORPORATION, Seoul (KR)
Filed by HYUNDAI MOTOR COMPANY, Seoul (KR); and KIA CORPORATION, Seoul (KR)
Filed on Jan. 19, 2024, as Appl. No. 18/417,308.
Claims priority of application No. 10-2023-0117149 (KR), filed on Sep. 4, 2023.
Int. Cl. F16H 61/28 (2006.01); F16H 59/48 (2006.01); F16H 61/04 (2006.01); F16H 61/00 (2006.01)
CPC F16H 61/2807 (2013.01) [F16H 59/48 (2013.01); F16H 61/0437 (2013.01); F16H 2061/0087 (2013.01); F16H 2061/2823 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A shift control method for a vehicle powertrain, the shift control method comprising:
calculating, by a controller configured to divide a shift process into a series of shift phases and perform shift control based on the shift phase, a control hydraulic pressure basic calculation value for implementing a necessary torque of a control target shift element based on the shift phase by using a control matrix created from a vehicle powertrain model;
calculating a control hydraulic pressure correction calculation value by correcting the control hydraulic pressure basic calculation value with a correction value including a learning value for the shift element; and
controlling the control target shift element on the basis of the control hydraulic pressure correction calculation value;
wherein in the calculating of the control hydraulic pressure basic calculation value, the controller calculates the control hydraulic pressure basic calculation value by using predetermined back-up data when a predetermined reference shift phase for specifying data required to calculate the control hydraulic pressure basic calculation value does not exist.