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公开(公告)号：US09523291B2
公开(公告)日：2016-12-20
申请号：US14661900
申请日：2015-03-18
Applicant: Caterpillar Inc.
Inventor： Charles F. Coffey , Edwin H. Langewisch , Ashwin A. Hattiangadi , David A. Cyborski , John S. Pipis, Jr. , Kevin D. Yoder
CPC classification number: F01L1/2411 , F01L1/181 , F01L1/20 , F01L1/24 , F01L1/26 , F01L1/267 , F01L2001/2433 , F01L2001/2444
Abstract: A valve actuation system is disclosed for an engine. The system may have at least one gas exchange valve, a rocker shaft, a camshaft, a rocker arm connected to the rocker shaft and operatively engaged with the camshaft, a valve bridge engaged with the at least one gas exchanger valve, a lash adjuster disposed in the valve bridge, and a button configured to slide on the valve bridge. The system may further include a pin fluidly connecting the rocker arm to the button and having an elongated cylindrical shaft with a first open end inside the rocker arm and a second end inside the button. The pin may also have a head connected to and a reservoir formed in the elongated cylindrical shaft. The pin may further have passages extending from the bore of the rocker arm to the reservoir, and s passage extending from the reservoir through the head.
Abstract translation: 公开了一种用于发动机的阀致动系统。 该系统可以具有至少一个气体交换阀，摇臂轴，凸轮轴，连接到摇臂轴并与凸轮轴可操作地接合的摇臂，与至少一个气体交换阀接合的阀桥，设置的间隙调节器 在阀桥中，以及构造成在阀桥上滑动的按钮。 该系统还可以包括将摇臂与按钮流体连接的销，并且具有细长的圆柱形轴，在摇臂内部具有第一开口端，并且在按钮内部具有第二端。 销还可以具有连接到细长圆柱形轴上的头部和形成在细长圆柱形轴中的储存器。 销还可以具有从摇臂的孔延伸到储存器的通道，以及从储存器延伸穿过头部的通道。
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公开(公告)号：US10711655B1
公开(公告)日：2020-07-14
申请号：US16594238
申请日：2019-10-07
Applicant: Caterpillar Inc.
Inventor： Ashwin A. Hattiangadi , Charles F. Coffey , Kevin D. Yoder
Abstract: A method of retrofitting a rocker arm assembly for an engine includes removing a first rocker arm assembly from the engine such that a camshaft of the engine remains in the engine. The method also includes providing a second rocker arm assembly that includes a rocker shaft, a rocker arm, a pushrod, and a hydraulic lash adjuster. The rocker arm is connected to the rocker shaft such that the rocker arm can pivot relative to the rocker shaft. The rocker arm has a first end, a second end, and a first oil passage. The pushrod has a top end and a bottom end, in which the top end is connected to the second end of the rocker arm and the bottom end is configured for engaging a camshaft of the engine. The hydraulic lash adjuster includes a housing, a first body member, a second body member, a check valve, and a biasing member. The first body member is disposed in the housing such that a first radial clearance exists between an outer surface of the first body member and an inner surface of the housing. The first body member has a first bore and an opening in fluid communication with the first oil passage of the rocker arm. The second body member is disposed in the first bore of the first body member such that a second radial clearance exists between the inner surface of the first bore of the first body member and an outer surface of the second body member. The second radial clearance is less than the first radial clearance. The check valve is configured to allow oil to flow through the opening of the first body member when the check valve is in an open position and configured to prevent the flow of oil through the opening when the check valve is in the closed position. The biasing member is disposed in a second bore of the second body member. The method further includes inserting the second rocker arm assembly into the engine such that the bottom end of the pushrod engages the camshaft of the engine and the front end of the rocker arm engages a valve assembly of the engine.
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Patent Agency Ranking
公开(公告)号：US11008901B1
公开(公告)日：2021-05-18
申请号：US16692476
申请日：2019-11-22
Applicant: Caterpillar Inc.
Inventor： Ashwin A. Hattiangadi , Charles F. Coffey
IPC: F01L1/24
Abstract: A rocker arm assembly having a rocker arm with a first end defining a first cavity, a second end opposite the first end, a bore positioned between the first end and the second end for pivotally mounting the rocker arm within an engine, and an oil passage extending from the bore to the cavity. A hydraulic lash adjuster is positioned within the cavity and has an oil inlet in fluid communication with the oil passage. The rocker arm has a vent passage configured to place the oil inlet in fluid communication with an area exterior to the rocker arm.
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公开(公告)号：US20210087950A1
公开(公告)日：2021-03-25
申请号：US16577171
申请日：2019-09-20
Applicant: Caterpillar Inc.
Inventor： Ashwin A. Hattiangadi , Charles F. Coffey , Chris I. Brown
Abstract: A rocker assembly including a rocker shaft having an outer surface, main oil passage, a first radial passage and a second radial and a rocker arm having a first end and an inner cylindrical surface defining a bore, wherein the rocker shaft is received in the bore to pivotably mount the rocker arm onto the rocker shaft. The rocker arm includes a hydraulic lash adjuster mounted within the first end and a first oil passage having an inlet at the inner cylindrical surface and an outlet in fluid communication with the hydraulic lash adjuster. The inner cylindrical surface is spaced apart from the outer surface of the rocker shaft by a radial clearance, and wherein an inlet to the first oil passage and a first outlet of the first radial passage are in a loaded region of the radial clearance.
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公开(公告)号：US11242774B2
公开(公告)日：2022-02-08
申请号：US16577171
申请日：2019-09-20
Applicant: Caterpillar Inc.
Inventor： Ashwin A. Hattiangadi , Charles F. Coffey , Chris I. Brown
Abstract: A rocker assembly including a rocker shaft having an outer surface, main oil passage, a first radial passage and a second radial and a rocker arm having a first end and an inner cylindrical surface defining a bore, wherein the rocker shaft is received in the bore to pivotably mount the rocker arm onto the rocker shaft. The rocker arm includes a hydraulic lash adjuster mounted within the first end and a first oil passage having an inlet at the inner cylindrical surface and an outlet in fluid communication with the hydraulic lash adjuster. The inner cylindrical surface is spaced apart from the outer surface of the rocker shaft by a radial clearance, and wherein an inlet to the first oil passage and a first outlet of the first radial passage are in a loaded region of the radial clearance.
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公开(公告)号：US11022009B2
公开(公告)日：2021-06-01
申请号：US16251773
申请日：2019-01-18
Applicant: Caterpillar Inc.
Inventor： Rong Qu , Charles F. Coffey
Abstract: A hydraulic lash adjuster includes a longitudinally extending pushrod having a proximal end and a distal end, and a cavity located at the distal end and a piston received in the cavity. The piston includes an internal reservoir and a fluid pathway to the internal reservoir. The fluid pathway includes a longitudinal passage and a radial passage.
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公开(公告)号：US20210156285A1
公开(公告)日：2021-05-27
申请号：US16692476
申请日：2019-11-22
Applicant: Caterpillar Inc.
Inventor： Ashwin A. Hattiangadi , Charles F. Coffey
IPC: F01L1/24
Abstract: A rocker arm assembly having a rocker arm with a first end defining a first cavity, a second end opposite the first end, a bore positioned between the first end and the second end for pivotally mounting the rocker arm within an engine, and an oil passage extending from the bore to the cavity. A hydraulic lash adjuster is positioned within the cavity and has an oil inlet in fluid communication with the oil passage. The rocker arm has a vent passage configured to place the oil inlet in fluid communication with an area exterior to the rocker arm.
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