公开(公告)号：US09714587B2

公开(公告)日：2017-07-25

申请号：US14595770

申请日：2015-01-13

Applicant: Caterpillar Inc.

Inventor： David Andrew Cyborski ,  John Stephen Pipis, Jr. ,  Edwin H. Langewisch ,  Sanjay Kumar

IPC: F01L1/14 ,  F01L1/26 ,  F16K1/14 ,  F16K1/32 ,  F01L1/24 ,  F01L1/047

CPC classification number: F01L1/26 ,  F01L1/146 ,  F01L1/2411 ,  F01L2001/054 ,  F01L2105/00 ,  F01L2250/02 ,  F01L2250/04 ,  F16K1/14 ,  F16K1/32

Abstract: A bridge assembly is disclosed for use with an internal combustion engine. The bridge assembly may have a valve bridge, a cylindrical housing disposed within the valve bridge, and a plunger disposed in the cylindrical housing and protruding from the valve bridge. The bridge assembly may also have a valve housing, a post located inside the valve housing, a plurality of obliquely angled ports passing through a straight annular wall portion of the valve housing, and a plurality of radially oriented ports passing through a tapered annular wall portion of the housing. The bridge assembly may further have a valve seat disposed at least partially inside the plunger, a ball disposed within the valve housing and movable between a distal end of the post and the valve seat, a first spring disposed over the post, and a second spring disposed within the cylindrical housing.

公开(公告)号：US09051854B1

公开(公告)日：2015-06-09

申请号：US14196403

申请日：2014-03-04

Applicant: Caterpillar Inc.

Inventor： David Andrew Cyborski

IPC: F01L1/14 ,  F01L1/24 ,  F01P3/12

CPC classification number: F01L1/2422 ,  F01L1/146

Abstract: A hydraulic lash adjuster for a valve train of an internal combustion engine uses a partial recirculation feature in order to provide device cooling while also retaining many of the benefits associated with leak recirculation. The hydraulic lash adjuster includes a hollow piston that is received in an axial bore of a body component. The annular clearance area between the hollow piston and the body defines a plurality of leak escape paths and a plurality of leak recirculation paths. The portion of the leaked oil recirculated is on a same order of magnitude as the remaining portion of the leaked oil that is allowed to escape back to sump.

Abstract translation: 用于内燃机的气门机构的液压间隙调节器使用部分再循环特征，以便提供装置冷却，同时还保留与泄漏再循环相关的许多益处。 液压间隙调节器包括容纳在主体部件的轴向孔中的中空活塞。 中空活塞和主体之间的环形空隙区域限定了多个泄漏逃逸路径和多个泄漏再循环路径。 再循环的泄漏油的部分与允许逃逸回集油槽的泄漏油的剩余部分处于同一数量级。

公开(公告)号：US09631522B2

公开(公告)日：2017-04-25

申请号：US14595735

申请日：2015-01-13

Applicant: Caterpillar Inc.

Inventor： David Andrew Cyborski ,  John Stephen Pipis, Jr.

IPC: F01L1/18 ,  F01L1/26 ,  F01L3/08 ,  F01L3/24 ,  F01M9/10 ,  F01L1/24

CPC classification number: F01L1/26 ,  F01L1/24 ,  F01L1/2411 ,  F01L3/08 ,  F01L3/24 ,  F01M9/106

Abstract: A valve bridge assembly is disclosed for an internal combustion engine. The assembly may have a valve bridge with a center portion, opposing lateral extensions, a bore passing through first and second ends of the center portion, and an internal annular shelf. The assembly may also have a cylindrical housing with a main portion, a tip portion protruding from the second end of the center portion, and a positioning flange resting on the internal annular shelf. The assembly may further have a plunger with a first end having a larger opening and a second end having a smaller opening. The first end may be disposed within the main portion of the cylindrical housing, and the second end may protrude from the first end of the center portion. The assembly may also have a valve assembly disposed within the larger opening of the plunger, and a spring disposed inside the cylindrical housing.