公开(公告)号：US11242927B2

公开(公告)日：2022-02-08

申请号：US16420608

申请日：2019-05-23

Applicant: GM Global Technology Operations LLC

Inventor： Ramadityanand Bhogadi ,  Paul G. Otanez

IPC: F16H61/06 ,  F16H61/662 ,  F16H9/04

Abstract: A continuously variable transmission control system includes a continuously variable transmission (CVT) including a primary variator pulley and a secondary variator pulley each including a set of pulley members defining a variable-width gap, and a flexible member positioned within the variable-width gap and movable to define a CVT ratio. The transmission control system also includes a primary pulley valve controlling a primary pulley pressure of a fluid to the primary variator pulley, a secondary pulley valve controlling a secondary pulley pressure of the fluid to the secondary variator pulley; and a pulley pressure control system configured to recognize and mitigate pressure oscillations occurring in the primary pulley pressure or in the secondary pulley pressure.

公开(公告)号：US20250026208A1

公开(公告)日：2025-01-23

申请号：US18355040

申请日：2023-07-19

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Rashmi Prasad ,  Chandra S. Namuduri ,  Ramadityanand Bhogadi ,  Sandeep U. Menon ,  Ananth Padmanabha Rao Vemuri ,  Aniket P. Kothari

IPC: B60L53/10 ,  B60L53/18 ,  B60L53/57 ,  B60L53/66 ,  H02J7/34

Abstract: A charging box performs a direct current fast charging (DCFC) session of a recipient by a donor, e.g., during a vehicle-to-vehicle (V2V) charging session, and includes a portable housing, disconnect devices connected to a high-voltage (HV) bus to connect/disconnect respective inlet and outlet charging ports to/from the bus, and multiple direct current-to-direct current (DC-DC) converters. A high-voltage-to-high-voltage (HV-HV) converter is connected to the bus. An optional high-voltage-to-low-voltage (HV-LV) converter may be connected to the HV-HV converter. An optional low-voltage (LV) energy storage device is connected to the housing and HV-LV converter. A communication processing unit (CPU) establishes two-way communication between the donor and recipient. A system controller selectively pre-charges the bus, recharge the energy storage device, and selectively command offloading of a DC charging current from the donor, through the HV-HV converter, and to the recipient.

公开(公告)号：US20200370642A1

公开(公告)日：2020-11-26

申请号：US16420608

申请日：2019-05-23

Applicant: GM Global Technology Operations LLC

Inventor： Ramadityanand Bhogadi ,  Paul G. Otanez

IPC: F16H61/06 ,  F16H9/04 ,  F16H61/662

Abstract: A continuously variable transmission control system includes a continuously variable transmission (CVT) including a primary variator pulley and a secondary variator pulley each including a set of pulley members defining a variable-width gap, and a flexible member positioned within the variable-width gap and movable to define a CVT ratio. The transmission control system also includes a primary pulley valve controlling a primary pulley pressure of a fluid to the primary variator pulley, a secondary pulley valve controlling a secondary pulley pressure of the fluid to the secondary variator pulley; and a pulley pressure control system configured to recognize and mitigate pressure oscillations occurring in the primary pulley pressure or in the secondary pulley pressure.