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:
Nov. 23, 2021
Filed:
May. 23, 2019
GM Global Technology Operations Llc, Detroit, MI (US);
Rolando Huerta Ortiz, Grandville, MI (US);
Michael E. McCarroll, Kentwood, MI (US);
GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US);
Abstract
An oil control valve for controlling a cam phaser includes a valve housing, a recirculation housing, a spool guide, a spool, a first and second recirculation valve, and a one-way inlet valve. The valve housing has a pressure inlet port, a first bore having a first inner surface, a first port, and a second port. The recirculation housing has a first slot, a second slot, a second bore having a second inner surface, and a first outer surface. A first recirculation valve is disposed in the first slot of the recirculation housing. A second recirculation valve is disposed in the second slot of the recirculation housing. The one-way inlet valve disposed in the pressure inlet port. The recirculation housing and spool are each slidingly disposed to have a first, second, and third modes.