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公开(公告)号：US20160273415A1
公开(公告)日：2016-09-22
申请号：US14661847
申请日：2015-03-18
Applicant: CATERPILLAR INC.
Inventor： Indrajith KIZHAKKETHARA , Sathishkumar RAMAN , Bhavin N. MEHTA , John S. PIPIS, JR. , Gopinath BASKARAN , Paul D. RUDOLPH
CPC classification number: F01L1/20 , F01L1/146 , F01L1/24 , F01L1/2422 , F01L2001/2444
Abstract: A valve actuation system is disclosed for an internal combustion engine. The system may have a gas exchange valve, a rocker arm pivotally connected to a shaft, a pushrod, a lash adjuster disposed in the pushrod. The system may also have an adjusting screw disposed in the rocker arm and configured to engage and fluidly supply the lash adjuster. The adjusting screw may include a shaft having a threaded outer annular surface, and a head connected to the shaft and having a rounded outer surface and a flat end face. The adjusting screw may also include an axial passage passing through the flat end face, a radial passage formed in the shaft and extending from the threaded bore of the rocker arm to the axial passage, and at least one radial groove formed in the rounded outer surface of the head and passing through the axial passage.
Abstract translation: 公开了用于内燃机的阀致动系统。 系统可以具有气体交换阀，可枢转地连接到轴的摇臂，推杆，设置在推杆中的间隙调节器。 系统还可以具有设置在摇臂中的调节螺钉并且构造成接合和流体地供应间隙调节器。 调节螺钉可以包括具有螺纹外环形表面的轴和连接到轴上并具有圆形外表面和平坦端面的头部。 调节螺钉还可以包括通过平端面的轴向通道，形成在轴中并从摇臂的螺纹孔延伸到轴向通道的径向通道，以及形成在圆形外表面中的至少一个径向槽 的头部并穿过轴向通道。
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公开(公告)号：US20170089224A1
公开(公告)日：2017-03-30
申请号：US14869269
申请日：2015-09-29
Applicant: Caterpillar Inc.
Inventor： Indrajith KIZHAKKETHARA , Prabhu NAGARAJ , Mallikarjuna MASALA , John S. PIPIS, JR. , Karen E. SNELLING , Michael J. MOTYL
CPC classification number: F01L1/18 , F01L1/146 , F01L1/181 , F01L1/20 , F01L1/22 , F01L1/26 , F01L1/32 , F01L1/46 , F01L1/462 , F01L3/08 , F01L3/10 , F01L3/22 , F01L2103/01 , F01L2105/00 , F01L2820/01 , F02F7/0021
Abstract: A rocker base is disclosed for use with a valve actuation system. The rocker base may have a housing with a top, a bottom, side walls connecting the top to the bottom, and end walls disposed between the side walls. The rocker base may also have rocker arm supports located inside the housing and integrally formed with the side walls, and an injector spring pad extending from one of the end walls toward a center of the housing. The rocker base may further have a rib connecting the injector spring pad to one of the rocker arm supports.
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公开(公告)号：US20170089223A1
公开(公告)日：2017-03-30
申请号：US14869291
申请日：2015-09-29
Applicant: Caterpillar Inc.
Inventor： Indrajith KIZHAKKETHARA , Gopinath BASKARAN , Ashwin A. HATTIANGADI , Rong Qu , Kevin W. REDINBO
CPC classification number: F01L1/146 , F01L1/18 , F01L1/181 , F01L1/20 , F01L1/26 , F01L1/32 , F01L1/46 , F01L1/462 , F01L3/00 , F01L3/08 , F01L3/10 , F01L3/22 , F01L2001/054 , F01L2103/01 , F01L2105/00 , F01L2820/01
Abstract: A valve actuation system is disclosed for use with an internal combustion engine. The valve actuation system may have a rocker shaft, a rocker arm pivotally mounted on the rocker shaft, at least one cam follower and a pushrod connecting the at least one cam follower to the rocker arm. The valve actuation system may also have a plurality of gas exchange valves, and a bridge connecting the rocker arm to the valves. The valve actuation system may further have at least one spring disposed around each of the valves and configured to bias each of the valves toward closed positions, and a rotocoil configured to rotatably connect the at least one spring to each of the valves. The rotocoil may have an internal chamfer at a bridge end with an angle of about 26-28°. The at least one spring may have an assembled load of about 750-850 N.
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