-
公开(公告)号：US11473457B2
公开(公告)日：2022-10-18
申请号：US17343948
申请日：2021-06-10
申请人： Caterpillar Inc.
摘要： A valve seat insert includes a top convex arcuate blend for improving fluid flow, and a valve seating surface for slowing down valve recession. The valve seating surface includes a radially outer convex arcuate segment defining an outer radius of curvature forming a first wear crown for contacting the valve at an early wear state, a radially inner convex arcuate segment defining an inner radius of curvature forming a second wear crown for contacting the valve at a later wear state, and a linear segment extending between the radially outer convex arcuate segment and the radially inner convex arcuate segment.
-
公开(公告)号：US20210301688A1
公开(公告)日：2021-09-30
申请号：US17343948
申请日：2021-06-10
申请人： Caterpillar Inc.
摘要： A valve seat insert includes a top convex arcuate blend for improving fluid flow, and a valve seating surface for slowing down valve recession. The valve seating surface includes a radially outer convex arcuate segment defining an outer radius of curvature forming a first wear crown for contacting the valve at an early wear state, a radially inner convex arcuate segment defining an inner radius of curvature forming a second wear crown for contacting the valve at a later wear state, and a linear segment extending between the radially outer convex arcuate segment and the radially inner convex arcuate segment.
-
公开(公告)号：US11125123B1
公开(公告)日：2021-09-21
申请号：US16821037
申请日：2020-03-17
申请人： Caterpillar Inc.
摘要： A valve seat insert includes a top convex arcuate blend for improving fluid flow, and a valve seating surface for slowing down valve recession. The valve seating surface includes a radially outer convex arcuate segment defining an outer radius of curvature forming a first wear crown for contacting the valve at an early wear state, a radially inner convex arcuate segment defining an inner radius of curvature forming a second wear crown for contacting the valve at a later wear state, and a linear segment extending between the radially outer convex arcuate segment and the radially inner convex arcuate segment.
-
公开(公告)号：US11028772B1
公开(公告)日：2021-06-08
申请号：US16773556
申请日：2020-01-27
申请人： Caterpillar Inc.
摘要： A method for estimating damage of a component of an internal combustion engine includes receiving a fuel rate signal indicative of a fuel rate of the internal combustion engine and estimating a temperature value of the component of the internal combustion engine based on at least the received fuel rate signal. The method also includes estimating an incremental amount of damage of the component of the internal combustion engine based on the estimated temperature value of the component of the internal combustion engine, updating a cumulative amount of damage of the component of the internal combustion engine based on the estimated incremental amount of damage, and outputting a notification based on at least the cumulative amount of damage of the component of the internal combustion engine.
-
25.发明申请公开(公告)号：US20200291827A1
公开(公告)日：2020-09-17
申请号：US16352347
申请日：2019-03-13
申请人： Caterpillar Inc.
发明人： Ashwin A. Hattiangadi , Srikanth Reddy Boddapati , Dongyao Wang , Uijal Paladhi , Paul David Smallidge , John Robert Brubaker , Abe Ingold
摘要： A valve seat insert for a gas exchange valve such as an intake valve controlling gas exchange of a cylinder includes an insert body having an inner peripheral surface, an outer peripheral surface, and a valve seating surface structured to contact the gas exchange valve at a closed position and profiled to limit valve recession thereof. The valve seating surface includes an arrangement of linear segments and curved segments forming wear crowns to contact the gas exchange valve at different wear states. The valve seat insert is further structured by way of the inner peripheral surface with an incoming flow crown, and a venturi extending from the incoming flow crown toward a throat of the valve seat insert. The venturi accelerates incoming gas flow.
-
公开(公告)号：US10711655B1
公开(公告)日：2020-07-14
申请号：US16594238
申请日：2019-10-07
申请人： Caterpillar Inc.
摘要： 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.
-
公开(公告)号：US20180334930A1
公开(公告)日：2018-11-22
申请号：US15600253
申请日：2017-05-19
申请人： Caterpillar Inc.
摘要： A rocker arm for an engine valve actuator assembly is disclosed. The rocker arm may include a rocker arm body disposed between a first and second arm end. Furthermore, a rocker arm bore and an adjuster compartment may be defined proximal to the second arm end. The rocker arm may further include a roller positioned at the first arm end and operably coupled to a cam, the cam configured to actuate the rocker arm between a first and second position. The rocker arm may further include a shaft inserted through a shaft mounting aperture and the rocker arm is configured to rotate about the shaft between the first and second positions. Furthermore, a fluid passage may be defined within the rocker arm body extending between a first passage opening formed in a bearing surface of the shaft mounting aperture and a second passage opening that opens into the adjuster compartment.
-
公开(公告)号：US10132206B1
公开(公告)日：2018-11-20
申请号：US15600253
申请日：2017-05-19
申请人： Caterpillar Inc.
摘要： A rocker arm for an engine valve actuator assembly is disclosed. The rocker arm may include a rocker arm body disposed between a first and second arm end. Furthermore, a rocker arm bore and an adjuster compartment may be defined proximal to the second arm end. The rocker arm may further include a roller positioned at the first arm end and operably coupled to a cam, the cam configured to actuate the rocker arm between a first and second position. The rocker arm may further include a shaft inserted through a shaft mounting aperture and the rocker arm is configured to rotate about the shaft between the first and second positions. Furthermore, a fluid passage may be defined within the rocker arm body extending between a first passage opening formed in a bearing surface of the shaft mounting aperture and a second passage opening that opens into the adjuster compartment.
-
公开(公告)号：US20180223701A1
公开(公告)日：2018-08-09
申请号：US15427865
申请日：2017-02-08
申请人： Caterpillar Inc.
CPC分类号： F01L1/181 , F01L1/053 , F01L1/2416 , F01L1/26 , F01L1/32 , F01L1/462 , F01L2101/00 , F01L2103/00
摘要： A replaceable hydraulic lash adjuster and method for assembling such are disclosed. The replaceable hydraulic lash adjuster includes a body, a piston, a check valve and a spring. The body configured to be received in and released from a compartment of a rocker arm. The body including a sidewall surrounding a floor. The floor including a passage that extends between an upper cavity and a lower cavity of the body. The piston disposed in the lower cavity. The piston defining a pocket. A check valve is disposed inside the lower cavity and a spring is disposed inside the pocket. The replacable hydraulic lash adjuster is configured to be slidingly removeable from the rocker arm.
-
-
-
-
-
-
-
-
搜索结果
29 条记录 (耗时 0.021 秒)
