公开(公告)号：US20180328481A1

公开(公告)日：2018-11-15

申请号：US15594164

申请日：2017-05-12

Applicant: GM Global Technology Operations LLC

Inventor： Christopher J. Weingartz ,  Mohamed O. Egal ,  Mark S. Reinhart ,  Fie An ,  Xuefeng T. Tao

IPC: F16H61/12 ,  F16H61/662

CPC classification number: F16H61/12 ,  F16H61/662 ,  F16H2061/1212 ,  F16H2061/1272

Abstract: A variator control diagnostic system for an automobile vehicle includes a ratio error calculated by subtracting a transmission actual ratio from a commanded ratio. A first lookup table includes: an adjusted ratio error defined by adjusting the ratio error using a transmission fluid temperature value; and a rate curve compared against the adjusted ratio error to identify a lookup table output. A second lookup table provides a gross slip multiplier value based on a ratio bin torque offset value for a transmission ratio range. An adjusted error count is created by multiplying the gross slip multiplier value by the lookup table output.

公开(公告)号：US20200292071A1

公开(公告)日：2020-09-17

申请号：US16299633

申请日：2019-03-12

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Steven P. Moorman ,  Christopher J. Weingartz

IPC: F16H61/30 ,  F15B11/00 ,  F15B13/02

Abstract: A hydraulic system may include an electrohydraulic control valve disposed in fluid communication between a source of pressured fluid and a hydraulic actuator. The hydraulic system may be controlled to correct for offset errors between a target actuator pressure and a current actuator pressure output from the control valve, without amplifying pressure oscillations in the fluid between the control valve and the hydraulic actuator.

公开(公告)号：US20180335138A1

公开(公告)日：2018-11-22

申请号：US15596219

申请日：2017-05-16

Applicant: GM Global Technology Operations LLC

Inventor： Ronald F. Lochocki ,  Christopher J. Weingartz ,  Greg J. Perantoni ,  Stuart W. Parker ,  Paul G. Otanez ,  Bret M. Olson ,  Mary M. Whitley ,  Nathan A. Schmidt

IPC: F16H61/662 ,  F16H9/18

CPC classification number: F16H61/66272 ,  F16H9/18 ,  F16H2061/66277

Abstract: An apparatus for ratio control of a continuously variable transmission includes a driver commanded ratio unit outputting a signal defining a commanded ratio. A clamp control portion is in communication with the driver commanded ratio unit. The clamp control portion includes: a ratio limits and override ring selecting a ratio matching the commanded ratio from an executable functions having stored ratio code data; a screening monitor continuously receiving output from the executable functions and using an input from a vehicle speed signal to compute minimum and maximum ratio limits for the ratio selected by the ratio limits and override ring; and a ratio control execution ring in communication with the screening monitor. The ratio control execution ring calculates a range of pressures allowed for operation of both primary and secondary pulleys of the continuously variable transmission.

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.

公开(公告)号：US20190118816A1

公开(公告)日：2019-04-25

申请号：US15791681

申请日：2017-10-24

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Ronald F. Lochocki, JR. ,  Christopher J. Weingartz ,  Bret J. Keller

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

Abstract: A vehicle propulsion system includes a prime mover having a prime mover output shaft, a continuously variable transmission having a variator input shaft coupled to the prime mover output shaft and having a variator output shaft, a driver torque request module in communication with a driver input and for outputting a driver torque request, an engine backbone in communication with the prime mover, and a transmission backbone in communication with the continuously variable transmission and the engine backbone in the vehicle propulsion system. The transmission backbone includes a positive torque request module that generates a positive torque request, and a positive torque request monitor that limits a torque request from the transmission backbone to the engine backbone to a maximum of a predetermined threshold.

公开(公告)号：US11085532B2

公开(公告)日：2021-08-10

申请号：US16299633

申请日：2019-03-12

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Steven P. Moorman ,  Christopher J. Weingartz

IPC: F15B11/00 ,  F16H61/30 ,  F15B13/02

Abstract: A hydraulic system may include an electrohydraulic control valve disposed in fluid communication between a source of pressured fluid and a hydraulic actuator. The hydraulic system may be controlled to correct for offset errors between a target actuator pressure and a current actuator pressure output from the control valve, without amplifying pressure oscillations in the fluid between the control valve and the hydraulic actuator.

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：US10316968B2

公开(公告)日：2019-06-11

申请号：US15596219

申请日：2017-05-16

Applicant: GM Global Technology Operations LLC

Inventor： Ronald F. Lochocki ,  Christopher J. Weingartz ,  Greg J. Perantoni ,  Stuart W. Parker ,  Paul G. Otanez ,  Bret M. Olson ,  Mary M. Whitley ,  Nathan A. Schmidt

IPC: F16H61/662 ,  F16H61/00 ,  F16H61/18 ,  F16H9/18 ,  B60W10/107

Abstract: An apparatus for ratio control of a continuously variable transmission includes a driver commanded ratio unit outputting a signal defining a commanded ratio. A clamp control portion is in communication with the driver commanded ratio unit. The clamp control portion includes: a ratio limits and override ring selecting a ratio matching the commanded ratio from an executable functions having stored ratio code data; a screening monitor continuously receiving output from the executable functions and using an input from a vehicle speed signal to compute minimum and maximum ratio limits for the ratio selected by the ratio limits and override ring; and a ratio control execution ring in communication with the screening monitor. The ratio control execution ring calculates a range of pressures allowed for operation of both primary and secondary pulleys of the continuously variable transmission.