公开(公告)号：US10024427B1

公开(公告)日：2018-07-17

申请号：US15409628

申请日：2017-01-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： James M Gessner ,  Christopher J Weingartz ,  John E Marano ,  Cole Reinhold

IPC: F16H61/66 ,  F16H61/662 ,  B60R16/023 ,  F16H59/70 ,  F16H61/00

Abstract: A method and system for controlling a ratio of a continuously variable transmission coupling a prime mover to a driven member in a vehicle. The method includes determining a current ratio of the continuously variable transmission, determining a projected ratio from a first ratio path of a predetermined ratio map, calculating a gradient between the current ratio and the projected ratio, determining whether the calculated gradient satisfies a gradient constraint, setting a control ratio to the projected ratio if the calculated gradient satisfies the gradient constraint, setting a control ratio to a modified ratio if the calculated gradient does not satisfy the gradient constraint, the modified ratio being based upon a ratio that satisfies the gradient constraint, and controlling the ratio of the continuously variable transmission to the control ratio.

公开(公告)号：US20180202549A1

公开(公告)日：2018-07-19

申请号：US15409628

申请日：2017-01-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： James M Gessner ,  Christopher J Weingartz ,  John E Marano ,  Cole Reinhold

IPC: F16H61/662 ,  B60R16/023

CPC classification number: F16H61/662 ,  F16H61/66 ,  F16H2059/704 ,  F16H2061/0096

Abstract: A method and system for controlling a ratio of a continuously variable transmission coupling a prime mover to a driven member in a vehicle. The method includes determining a current ratio of the continuously variable transmission, determining a projected ratio from a first ratio path of a predetermined ratio map, calculating a gradient between the current ratio and the projected ratio, determining whether the calculated gradient satisfies a gradient constraint, setting a control ratio to the projected ratio if the calculated gradient satisfies the gradient constraint, setting a control ratio to a modified ratio if the calculated gradient does not satisfy the gradient constraint, the modified ratio being based upon a ratio that satisfies the gradient constraint, and controlling the ratio of the continuously variable transmission to the control ratio.

公开(公告)号：US10661804B2

公开(公告)日：2020-05-26

申请号：US15950097

申请日：2018-04-10

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Paul G. Otanez ,  Michael Livshiz ,  Christopher J. Weingartz ,  Cole Reinhold ,  Michael T. Sarzynski ,  Mateusz M. Nowak ,  Bharath Pattipati

IPC: B60W10/06 ,  B60W10/107 ,  B60W30/188 ,  B60W30/18

Abstract: A propulsion system, control system, and method use model predictive control systems to generate a plurality of sets of possible command values and determine a cost for each set of possible command values. The set of possible command values that has the lowest cost is determined and defined as a selected set of command values. In some circumstances, the MPC-determined command value may be replaced by another transmission ratio command based on override inputs. Minimum and maximum transmission ratios are determined based on the override inputs, and a constrained (or arbitrated) transmission ratio is determined therefrom. The constrained or arbitrated transmission ratio is used to determine whether to apply an MPC-determined transmission ratio or a transmission ratio based on the arbitrated transmission ratio to determine an ultimate commanded transmission ratio. Pressure(s) are commanded to a transmission pulley assembly, which is configured to implement the ultimate commanded transmission ratio.

公开(公告)号：US20190308626A1

公开(公告)日：2019-10-10

申请号：US15950097

申请日：2018-04-10

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Paul G. Otanez ,  Michael Livshiz ,  Christopher J. Weingartz ,  Cole Reinhold ,  Michael T. Sarzynski ,  Mateusz M. Nowak ,  Bharath Pattipati

IPC: B60W30/188 ,  B60W10/06 ,  B60W10/107 ,  B60W30/18

Abstract: A propulsion system, control system, and method use model predictive control systems to generate a plurality of sets of possible command values and determine a cost for each set of possible command values. The set of possible command values that has the lowest cost is determined and defined as a selected set of command values. In some circumstances, the MPC-determined command value may be replaced by another transmission ratio command based on override inputs. Minimum and maximum transmission ratios are determined based on the override inputs, and a constrained (or arbitrated) transmission ratio is determined therefrom. The constrained or arbitrated transmission ratio is used to determine whether to apply an MPC-determined transmission ratio or a transmission ratio based on the arbitrated transmission ratio to determine an ultimate commanded transmission ratio. Pressure(s) are commanded to a transmission pulley assembly, which is configured to implement the ultimate commanded transmission ratio.