公开(公告)号：US20240375480A1

公开(公告)日：2024-11-14

申请号：US18313449

申请日：2023-05-08

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Min Sun ,  David Eugene Edwards ,  Cameron Paul Smith ,  Rupesh Sonu Kakade

IPC: B60H1/00

Abstract: A method of operating a cooling system of a vehicle includes measuring a refrigerant pressure and a refrigerant temperature of a flow of refrigerant in a refrigerant circuit of the cooling system, estimating a relative humidity of a supply airflow across an evaporator of the refrigerant circuit utilizing the measured refrigerant pressure and the measured refrigerant temperature, and changing operation of one or more components of the refrigerant circuit as a result of the estimated relative humidity.

公开(公告)号：US12115837B2

公开(公告)日：2024-10-15

申请号：US17493452

申请日：2021-10-04

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Neeraj S. Shidore ,  Min Sun ,  David Eugene Edwards ,  Ryan D. Hopper

IPC: B60H1/32 ,  G01N11/00 ,  G01N11/02

CPC classification number: B60H1/3205 ,  G01N11/02 ,  B60H2001/325 ,  B60H2001/3257 ,  G01N2011/0093

Abstract: A system includes a compressor outlet temperature module, a refrigerant quality module, and a correction factor module. The compressor outlet temperature module is configured to estimate a temperature at an outlet of a compressor in a thermal system of an electric vehicle. The refrigerant quality module is configured to estimate a quality of refrigerant at an inlet of the compressor based on an enthalpy at the compressor inlet and an inlet enthalpy correction factor. The refrigerant quality is a ratio of vapor refrigerant mass to total refrigerant mass. The correction factor module is configured to determine the inlet enthalpy correction factor based on the estimated compressor outlet temperature and a temperature measured at the compressor outlet.