公开(公告)号：US11168591B1

公开(公告)日：2021-11-09

申请号：US16941839

申请日：2020-07-29

Applicant: BorgWarner, Inc.

Inventor： John C. Bulzacchelli ,  Michael L. Smart

IPC: F01L1/34 ,  F01L1/344

Abstract: A hydraulically-actuated variable camshaft timing (VCT) phaser assembly is employed for use in an automotive internal combustion engine. The VCT phaser assembly has a housing, a rotor, a first plate, a second plate, and a control valve. The rotor is situated within the housing, and a plurality of chambers are established between the rotor and housing. The first plate is situated on one side of the housing and rotor, and the second plate is situated on an opposite side of the housing and rotor. One or more air vents reside in one or more of the housing, rotor, first plate, second plate, or control valve. Air separated from hydraulic fluid in the VCT phaser assembly amid use and that makes its way to the air vent(s) can escape the VCT phaser assembly.

公开(公告)号：US20250154886A1

公开(公告)日：2025-05-15

申请号：US18388982

申请日：2023-11-13

Applicant: BorgWarner Inc.

Inventor： Michael Smart ,  John C. Bulzacchelli

IPC: F01L1/344

Abstract: A variable cam timing phaser includes a housing and a rotor defining a plurality of chambers, a first end plate, and a second end plate. The variable cam timing phaser additionally includes at least one air vent located at a center of rotation region of at least one of the housing, the rotor, the first end plate, or the second end plate. The at least one air vent is fluidly coupled to the plurality of chambers and is configured to vent air from the plurality of chambers. The variable cam timing phaser also includes a reservoir fluidly coupled to the at least one air vent. The reservoir is configured to retain hydraulic fluid and is configured to reduce air from being ingested through the at least one air vent and into the plurality of chambers.