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公开(公告)号：US20230014127A1
公开(公告)日：2023-01-19
申请号：US17934866
申请日：2022-09-23
申请人： Moto Tassinari, Inc.
摘要： A reed valve includes a first valve body portion that includes one or more inlet apertures fluidly coupled to a tapered second valve body portion that includes one or more outlet apertures. The reed valve includes at least one sealing surface disposed proximate the one or more outlet apertures and at least one petal continuously, reversibly, displaceable between an OPEN position permitting forward flow through the reed valve when a fluid pressure proximate the at least one inlet aperture exceeds a fluid pressure proximate the at least one outlet aperture and a CLOSED position preventing reverse flow through the reed valve when a fluid pressure proximate the at least one outlet aperture exceeds a fluid pressure proximate the at least one inlet aperture. The reed valve may be installed in an airbox assembly used with a turbocharged engine to reduce the occurrence of turbo-lag on acceleration.
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公开(公告)号：US11311964B2
公开(公告)日：2022-04-26
申请号：US16767276
申请日：2018-08-07
发明人： Guido Bayard , Stefan Kellerman , Antonius Wolking , Luthfi Arief
摘要： A method for manufacturing an internally cooled valve (2), includes providing a valve body (4) having a valve stem (6) that ends in a valve head (8). The valve body (4) has a cavity (10) that is open toward the valve head (8) and with a valve base element (12) by friction welding the valve base element (12) to the valve head (8). The valve bottom element (12) is preferably a sintered component.
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公开(公告)号：US11215092B2
公开(公告)日：2022-01-04
申请号：US16717428
申请日：2019-12-17
申请人： Caterpillar Inc.
摘要： An engine valve includes a stem, a head comprising an outer lip surface, a seating surface extending from the outer lip surface toward the stem, and a combustion surface extending from the outer lip surface on the opposite side of the head as compared to the seating surface. The combustion surface includes a first convex arcuate surface spaced away from the outer lip surface, at least partially forming a raised ring, and a first concave arcuate surface spaced away from the outer lip surface, at least partially forming a dimple.
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公开(公告)号：US20210270154A1
公开(公告)日：2021-09-02
申请号：US17317773
申请日：2021-05-11
发明人： Koji KUNITAKE , Daiki SATO , Yuki SASAGAWA
摘要： A method for manufacturing an engine poppet valve may comprise a forging operation, a diameter-decreasing operation, and a joining operation. At the forging operation, an intermediate member at which a valve head portion and an intermediate stem portion are made integral by way of a neck portion may be formed. At the diameter-decreasing operation, the intermediate stem portion may be inserted between/among a plurality of diameter-decreasing tools that have stem member compressing surfaces and stem member inlet surfaces formed so as to be progressively distant from the stem member compressing surfaces and toward the tip end and that are arranged at a plurality of circumferentially equipartite locations about a circumference of the intermediate stem portion, application at the intermediate stem portion from a base end portion of compressive forces which are inwardly directed in a radial direction from the compressing surfaces of the respective diameter-decreasing tools which have been made to come in contact with a part of the intermediate stem portion that has been made to rotate while being displaced in relative fashion in a direction along a central axis thereof causing the part of the intermediate stem portion to be decreased in diameter from the base end portion and causing a main body portion of a first stem portion to be formed at the intermediate member and also causing formation by the compressing surfaces of a stepped portion which is continuous with the main body portion, and formation, by an absence of decrease in diameter of a remaining portion at the intermediate stem portion, of a second stem portion which is broader in girth than the main body portion and which is continuous with the neck portion and which is also continuous with the main body portion by way of the stepped portion. At the joining operation, a stem end member having a same outside diameter as the main body portion may be joined to a base end portion of the main body portion.
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公开(公告)号：US20210180478A1
公开(公告)日：2021-06-17
申请号：US16713633
申请日：2019-12-13
申请人： Caterpillar Inc.
摘要： An engine head assembly includes a valve seat insert having a valve seating surface defining a center axis, and each of an inner peripheral surface and an outer peripheral surface extending circumferentially around the valve seat center axis. The outer peripheral surface includes an upper section interference-fitted with the engine head, and a lower section. A stiffness relief channel is formed by a relief cutout in the valve seat insert, and extends radially between the lower section of the outer peripheral surface and the engine head. The stiffness relief channel permits flexing of the valve seat insert to cushion valve seating to prolong engine valve and valve seat insert service life.
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公开(公告)号：US10519820B2
公开(公告)日：2019-12-31
申请号：US15339642
申请日：2016-10-31
摘要： An intake valve for a combustion engine is described. The intake valve has a head portion that is designed to improve the flow of air-fuel mixture around the head portion and into the combustion chamber. The head portion has a beveled or rounded edge at the top surface. The angle changes from the underside surface to the top surface are rounded to prevent separation of the air-fuel mixture from the surface of the intake valve. In addition, the underside surface of the head portion has a plurality of helical grooves that induce a circular flow to improve mixing of the air-fuel mixture in the chamber. The helical grooves also improve heat exchange between the air-fuel mixture and the intake valve.
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公开(公告)号：US10364710B2
公开(公告)日：2019-07-30
申请号：US15464790
申请日：2017-03-21
发明人： Takafumi Murakami
摘要： An engine valve and a method of producing the engine valve are provided. The engine valve includes a shaft part and an umbrella part formed at one end of the shaft part. The engine valve opens and closes an intake port or an exhaust port of a combustion chamber of an internal combustion engine. Further, at least a portion of the engine valve that extends from the umbrella part to a position on the shaft part in a longitudinal direction thereof includes a valve body made of steel or nickel alloy, and a core member made of copper or copper alloy and provided inside the valve body.
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公开(公告)号：US10287933B2
公开(公告)日：2019-05-14
申请号：US15108470
申请日：2014-12-17
发明人： Satoshi Ikemi , Hiroshi Oshige , Kiyoshi Suwa , Kenichi Sato , Kouji Kunitake , Ryouichi Yoshino
IPC分类号： B22F7/02 , B22F7/06 , F01L3/02 , F01L3/04 , F01L3/14 , F01L3/18 , F01L3/20 , F01L3/22 , C22C33/02 , C22C38/00 , C22C38/02 , C22C38/04 , C22C38/44 , C22C38/46 , C22C38/52
摘要： In an assembly of a hollow poppet valve and a valve seat insert, the hollow poppet valve's head is integrally formed with a stem end, a hollow part is formed from the head to a stem, and coolant is filled into the hollow part along with an inert gas. The valve seat insert is formed of iron base sintered alloy and obtained by integrating two layers of a supporting material side layer and a valve contact face side layer. The hollow poppet valve is formed of a material having thermal conductivity of 5-45 (W/m·K) at 20-1000° C. The valve seat insert includes the supporting material side layer having thermal conductivity of 23-50 (W/m·K) at 20-300° C. and a valve contact face side layer having thermal conductivity of 10-22 (W/m·K) at 20-300° C. This enables a valve temperature decrease throughout an engine's entire RPM range compared with the prior art.
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公开(公告)号：US20180347414A1
公开(公告)日：2018-12-06
申请号：US15761643
申请日：2016-07-11
发明人： STEFAN KELLERMANN , GUIDO BAYARD
CPC分类号： F01L3/14 , F01L2101/00 , F01L2103/00 , F01L2810/01
摘要： The invention relates to a cooled inlet or outlet valve (4) for internal combustion engines, comprising a valve disc (6), a valve stem (8), and a hollow space (10) inside the valve stem (8) and the valve disc (6). A coolant (12) is arranged in the hollow space (10). The valve is designed comprising at least two parts and has on a valve disc surface (22) an opening (18) which is closed by a cover (20), wherein the cover (20) is additionally provided with at least one relief groove (34) which relieves a joint (32) between the opening (18) in the valve disc surface (22) and the cover (20).
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公开(公告)号：US20180171837A1
公开(公告)日：2018-06-21
申请号：US15384523
申请日：2016-12-20
申请人： Caterpillar Inc.
发明人： Mark D. Veliz , Rong Qu , Arun Lai Gain , Walter Sherman Isenberg , Rui YUan , Thierry Andre Marchione
CPC分类号： F01L3/14 , F01L1/32 , F01L3/06 , Y02T10/146
摘要： A poppet valve has an elongated stem that is configured to extend along a longitudinal axis. The poppet valve further includes a valve body that is disposed laterally with respect to the longitudinal axis and located in a spaced apart relation with an end of the elongated stem. The valve body has a pair of opposing faces disposed co-axial with the longitudinal axis of the elongated stem. The poppet valve also includes at least two arcuately shaped appendages depending downwardly from the end of the elongated stem and extending away from the longitudinal axis of the elongated stem. An end of each appendage is disposed in abutment with an annular region defined on one of the opposing faces of the valve body, a perimeter of the annular region being larger than a perimeter of the elongated stem measured about the longitudinal axis.
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