公开(公告)号：US20170248178A1

公开(公告)日：2017-08-31

申请号：US15056732

申请日：2016-02-29

Applicant: GM Global Technology Operations LLC

Inventor： Vijay A. Neelakantan ,  Ajit Singh Grewal

IPC: F16D48/02 ,  F16D11/14 ,  F16D25/12 ,  F16D25/08

CPC classification number: F16D48/02 ,  F16D11/14 ,  F16D25/08 ,  F16D25/123 ,  F16D25/14 ,  F16D2048/0209 ,  F16D2048/0221 ,  F16D2048/0257

Abstract: A hydraulic control system includes a hydraulic pump driven by an electric motor, a solenoid valve having an output that controls the positions of a pressure regulator valve and a third, stator shift valve. The solenoid valve is a normally high, variable force solenoid valve which provides a control signal to the second and third valves. The second, pressure regulator valve is a multiple port valve which controls hydraulic fluid flow both to a transmission oil cooler (ATOC) and to an exhaust port, thereby maintaining a desired system pressure. The third, stator shift valve is also a multiple port valve and it controls fluid flow to the stator of the electric pump motor to provide cooling and to a dog clutch of the transmission to disengage it.

公开(公告)号：US09856931B2

公开(公告)日：2018-01-02

申请号：US15056732

申请日：2016-02-29

Applicant: GM Global Technology Operations LLC

Inventor： Vijay A. Neelakantan ,  Ajit Singh Grewal

IPC: F16D48/02 ,  F16D25/08 ,  F16D11/14 ,  F16D25/12

CPC classification number: F16D48/02 ,  F16D11/14 ,  F16D25/08 ,  F16D25/123 ,  F16D25/14 ,  F16D2048/0209 ,  F16D2048/0221 ,  F16D2048/0257

Abstract: A hydraulic control system includes a hydraulic pump driven by an electric motor, a solenoid valve having an output that controls the positions of a pressure regulator valve and a third, stator shift valve. The solenoid valve is a normally high, variable force solenoid valve which provides a control signal to the second and third valves. The second, pressure regulator valve is a multiple port valve which controls hydraulic fluid flow both to a transmission oil cooler (ATOC) and to an exhaust port, thereby maintaining a desired system pressure. The third, stator shift valve is also a multiple port valve and it controls fluid flow to the stator of the electric pump motor to provide cooling and to a dog clutch of the transmission to disengage it.