The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 29, 2018
Filed:
Mar. 16, 2017
GM Global Technology Operations Llc, Detroit, MI (US);
Timothy Z Jin, Pleasant Ridge, MI (US);
Chinar S Ghike, Farmington Hills, MI (US);
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Abstract
A hydraulic control system for a motor vehicle transmission includes a pressure regulation subsystem and a manual valve assembly in fluid communication with the pressure regulation subsystem. The manual valve assembly is moveable between at least park, neutral, drive, and reverse positions. A default disable valve assembly is in fluid communication with the manual valve assembly, a default disable solenoid valve assembly, and a default select valve assembly. A one-way valve may be provided to permit hydraulic fluid to flow to a second-priority hydraulic circuit when in a default mode of operation. A combined main regulation and priority valve may be provided to pressurize line pressure as a first priority, pressurize the second-priority hydraulic circuit as a second priority, and to feed excess pressure to a decrease-pressure circuit as a third priority.