公开(公告)号：US20180094709A1

公开(公告)日：2018-04-05

申请号：US15714088

申请日：2017-09-25

Applicant: BorgWarner Inc.

Inventor： Mark M. WIGSTEN ,  Kevin B. TODD ,  Dale N. SMITH ,  Sean R. SIMMONS ,  Seongdo HONG

IPC: F16H7/08

Abstract: A pressure regulator is in fluid communication with a supply inlet of a hydraulic tensioner to actively control fluid to the inlet of the hydraulic tensioner. By actively controlling the pressure regulator based on engine conditions and thus the oil pressure being fed to the hydraulic tensioner, the oil pressure to the hydraulic tensioner may be reduced at low engine speeds, increasing the efficiency of the timing system, or allowing full oil pressure at high engine speeds and low engine temperature.

公开(公告)号：US20190338836A1

公开(公告)日：2019-11-07

申请号：US16476600

申请日：2017-01-09

Applicant: BorgWarner Inc.

Inventor： Jeremy BENN ,  Seongdo HONG

IPC: F16H7/08 ,  F16J9/08

Abstract: This invention pertains to the field of hydraulic tensioners. A hydraulic tensioner of this invention includes a tensioner body having a bore in fluid communication with a source of pressurized fluid through an inlet, a hollow piston slidably received within the bore and having an outer diameter, a hydraulic pressure chamber defined by the hollow piston and the bore of the tensioner body, a piston spring received within the hydraulic pressure chamber for biasing the piston away from the inlet, and a metallic band surrounding the outer diameter of the piston. The metallic band forms a seal between an outer surface of the piston and the tensioner body when pressure builds in the hydraulic pressure chamber, wherein metallic bands or seals are placed over a hydraulic tensioner piston in order to seal the high pressure chamber and prevent or reduce leakage through the clearance between the piston and the tensioner body.

公开(公告)号：US20190309831A1

公开(公告)日：2019-10-10

申请号：US16378860

申请日：2019-04-09

Applicant: BorgWarner Inc.

Inventor： Keith B. COBB ,  Mark WIGSTEN ,  Kevin TODD ,  XiaoJian LU ,  Seongdo HONG ,  Paul FREEMANTLE ,  Akira TAKEUCHI

IPC: F16H7/08 ,  F16H25/18

Abstract: Hydraulic tensioner device including a tensioner arm and a hydraulic tensioner. The tensioner arm comprising: a body having a first end, a second end, a chain sliding surface and a surface opposite the chain sliding face; a pivot at the first end or the second end of the body; and a banjo bolt feed at the other of the first end or second end of the body. The hydraulic tensioner being pivotably attached to the pivot and the banjo bolt and adjacent the surface opposite the chain sliding face, wherein the hydraulic tensioner receives supply fluid from the banjo bolt, the hydraulic tensioner comprising: a housing with a bore; a hollow piston having a first end and a second end, slidably received within the bore; and a spring received within the bore of the housing and the hollow piston biasing the hollow piston outwards from the bore of the housing.

公开(公告)号：US20210285524A1

公开(公告)日：2021-09-16

申请号：US16325038

申请日：2017-08-16

Applicant: BorgWarner Inc.

Inventor： Toru SHINOYAMA ,  Jeremy BENN ,  Dale N. SMITH ,  Seongdo HONG

IPC: F16H7/08 ,  F01L1/02 ,  F16K15/04 ,  F16K39/02

Abstract: An integrated valve for a hydraulic tensioner includes a pressure relief valve with an integrated band, which is preferably made of metal, placed around the outside of a pressure relief valve body. A hydraulic tensioner includes a housing with a bore and a hollow piston slidably received within the bore. A piston spring biases the piston in a direction toward a power transmission device. The tensioner also includes an integrated check valve in a body of the housing. The integrated check valve includes a pressure relief valve mechanism and a band check valve mechanism surrounding a circumference of the pressure relief valve mechanism. The pressure relief valve mechanism permits transfer of pressurized fluid from a piston chamber formed by the hollow piston to the source of pressurized fluid and the check valve mechanism permits transfer of pressurized fluid from the source of pressurized fluid to the piston chamber.

公开(公告)号：US20200284325A1

公开(公告)日：2020-09-10

申请号：US16800003

申请日：2020-02-25

Applicant: BorgWarner Inc.

Inventor： Adam C. HUNT ,  Seongdo HONG

IPC: F16H7/08

Abstract: A sealed tensioner is used in an automotive application to keep a belt or chain under its intended tension as it wears and stretches. The sealed tensioner is hydraulic but lacks an outside oil supply. The sealed tensioner, in an example, includes an outer body having a first bore. A cartridge body is received in the first bore. The cartridge body has a second bore. A piston is carried in the second bore. A check valve is situated between a low pressure reservoir and a high pressure chamber. One or more baffle walls are located at the low pressure reservoir. The baffle wall(s) block an air pocket in the low pressure reservoir from entering the high pressure chamber.