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：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.