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:
Dec. 15, 2020
Filed:
Nov. 01, 2019
Borgwarner Inc., Auburn Hills, MI (US);
BorgWarner Inc., Auburn Hills, MI (US);
Abstract
A variable cam timing phaser mounted to a camshaft and including a housing assembly having an outer circumference for accepting a drive force; a rotor assembly received by the housing assembly defining a chamber separated into an advance chamber and retard chamber by a vane; a control valve in fluid communication with the advance chamber and the retard chamber, a source of fluid, and a sump through at least one exhaust line connected to at least one exhaust port; and at least one check valve in the at least one exhaust line between the control valve and the sump. The at least one check valve prevents air from the sump connected to the at least one exhaust port from being sucked into the variable cam timing phaser through the at least one exhaust port during a torque reversal of the camshaft.