公开(公告)号：US10077834B2

公开(公告)日：2018-09-18

申请号：US15235183

申请日：2016-08-12

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： John C Schultz ,  Robert L Moses ,  Derek F Lahr ,  Shushan Bai

IPC: F16H61/00 ,  F16K11/07 ,  F16K15/04 ,  G05D16/10

CPC classification number: F16H61/0025 ,  F16K11/07 ,  F16K15/04 ,  G05D16/106

Abstract: A dual pressure pump system for a transmission includes a dual pressure pump having a first pump outlet and a second pump outlet, and a pressure regulator valve defining a first chamber in fluid communication with the first pump outlet and a second chamber in fluid communication with the second pump outlet. The pressure regulator valve is configured to selectively connect the first chamber with a first pressure line operating at a first greater-than-zero pressure and to selectively connect the second chamber to a second pressure line operating at a second greater-than-zero pressure.