公开(公告)号：US20240344467A1

公开(公告)日：2024-10-17

申请号：US18580653

申请日：2022-07-19

Applicant: NIPPON PISTON RING CO., LTD.

Inventor： Yuji NAGAOKA ,  Satoshi IKEMI ,  Katsuaki SATO

IPC: F01L3/02 ,  C22C38/02 ,  C22C38/44 ,  C22C38/56 ,  C22C38/58

CPC classification number: F01L3/02 ,  C22C38/02 ,  C22C38/44 ,  C22C38/56 ,  C22C38/58

Abstract: An iron-based sintered alloy valve seat insert for an internal combustion engine having excellent wear resistance, has a composition wherein Si—Cr—Ni—Fe type Mo-based intermetallic compound particles having a hardness of 700 to 1300 HV in terms of Vickers hardness and a composition containing Si: 1.5% to 3.5%, Cr: 7.0% to 9.0%, Mo: 35.0% to 45.0%, and Ni: 5.0% to 20.0% in terms of mass %, with a remainder being Fe and inevitable impurities are dispersed as hard particles in a base matrix phase that includes hard particles, solid lubricant particles, and contains C: 0.5% to 2.0%, Si: 0.2% to 2.0%, Mn: 5% or less, Cr: 0.5% to 15%, Mo: 3% to 20%, and Ni: 1 to 10% in terms of mass %, and further contains V: 0% to 5%, W: 0% to 10%, S: 0% to 2%, and Cu: 0% to 5%, with a remainder being Fe and inevitable impurities.

公开(公告)号：US20240328333A1

公开(公告)日：2024-10-03

申请号：US18710730

申请日：2022-11-15

Applicant: COSCO SHIPPING MARINE EQUIPMENT & SPARES (NANJING) CO.,LTD

Inventor： Hong LU ,  Weiwei DAI ,  Lihe JIANG ,  Guozheng QUAN ,  Xiaolin ZHANG

IPC: F01L3/02 ,  B21J5/02 ,  C22C19/05 ,  C22F1/10

CPC classification number: F01L3/02 ,  B21J5/02 ,  C22C19/058 ,  C22F1/10

Abstract: Provided are a large-size diesel exhaust valve and a manufacturing method thereof, which relate to the technical field of manufacturing of large-size diesel exhaust valves for ships. The large-size diesel exhaust valve includes an exhaust valve disc portion made of a 3J40 alloy, and the large-size diesel exhaust valve has the following microstructure: there are ultra-fine grains with a grain size of 10 grade or more, α-Cr lamellar phases are evenly distributed at grain boundaries of the ultra-fine grains, nickel-lean Cr—Al—Ce particle phases are evenly distributed in a matrix, a single lamella of the α-Cr lamellar phases has a thickness of less than 140 nm, and the nickel-lean Cr—Al—Ce particle phases have a diameter of less than 10 μm. The present application solves the technical problem of how to improve the comprehensive mechanical properties and the vibration-damping performance of a large-size diesel exhaust valve simultaneously.

公开(公告)号：US11761402B2

公开(公告)日：2023-09-19

申请号：US17908330

申请日：2021-03-01

Applicant: Briggs & Stratton, LLC

Inventor： Jacob Zuehl ,  Richard Sebzda ,  Vernon Moss

IPC: F02F1/06 ,  F02F7/00 ,  F01L1/14 ,  F01L1/18 ,  F01L3/02 ,  F01P1/00 ,  F02F1/00 ,  F02F3/00 ,  F16J9/28 ,  F16C7/02

CPC classification number: F02F7/0085 ,  F01L1/146 ,  F01L1/181 ,  F01L3/02 ,  F01P1/00 ,  F02F1/004 ,  F02F3/0084 ,  F16J9/28 ,  F01L2301/00 ,  F16C7/023

Abstract: An internal combustion engine includes an engine block, a piston, a cylinder head, and a valve train. The engine block includes a cylinder block including a cylinder bore and a crankcase defining a crankcase chamber with a crankshaft positioned within the crankcase chamber. The piston is coupled to the crankshaft and configured to reciprocate within the cylinder bore. The cylinder head is coupled to the cylinder block. The valve train includes a camshaft, a first and second pushrod, a first and second rocker arm, an exhaust valve housed, and an intake valve. The first rocker arm, the second rocker arm, the exhaust valve, and the intake valve each include at least a layer of a low friction material. The first and second pushrod each pass through a pushrod seal to prevent fluid from reaching the rocker chamber to fluidly isolate the rocker chamber from the crankcase chamber.

公开(公告)号：US20190009327A1

公开(公告)日：2019-01-10

申请号：US15641646

申请日：2017-07-05

Applicant: L.E. Jones Company

Inventor： Cong Yue Qiao ,  David M. Doll ,  Donald K. Morris ,  Howard Delorme, JR.

IPC: B22C9/02 ,  B22C9/20 ,  B22C9/22

CPC classification number: B22C9/02 ,  B22C9/101 ,  B22C9/20 ,  B22C9/22 ,  B22C13/08 ,  F01L3/02 ,  F01L2101/00 ,  F01L2103/01 ,  F02F1/24

Abstract: A method of casting valve seat inserts comprises pouring molten metal into a gating system of a mold plate stack wherein mold plates are located between top and bottom molds wherein the gating system includes a casting header, down-sprue, horizontal sprue, up-sprues, runners, and gates in fluid communication with mold cavities configured to form the valve seat inserts. The method includes filling the mold cavities with the molten metal, and controlling solidification of the molten metal in the mold cavities by means of an outer thermal barrier which retards heat transfer in mold plate material between the mold cavities and an outer periphery of the mold plate stack. An inner thermal barrier can be sued to further control solidification of the molten metal. Valve seat inserts produced using the thermal jacket molds can exhibit an improved microhardness distribution which provides improved machining and higher yield.

公开(公告)号：US20180283234A1

公开(公告)日：2018-10-04

申请号：US15764956

申请日：2016-09-28

Applicant: KABUSHIKI KAISHA RIKEN

Inventor： Kimiaki HASHIMOTO

IPC: F01L3/02 ,  B22F1/00 ,  C22C1/04 ,  C22C19/07 ,  C22C38/24 ,  C22C38/22 ,  C22C38/02 ,  C22C38/04 ,  B22F5/00

CPC classification number: F01L3/02 ,  B22F1/0011 ,  B22F1/007 ,  B22F5/008 ,  B22F2201/20 ,  B22F2301/10 ,  B22F2301/15 ,  B22F2301/35 ,  B22F2304/10 ,  B22F2998/10 ,  B22F2999/00 ,  C22C1/04 ,  C22C1/0425 ,  C22C19/07 ,  C22C32/0021 ,  C22C32/0047 ,  C22C32/0078 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22 ,  C22C38/24 ,  C22C38/34 ,  F01L2103/01 ,  F01L2810/02 ,  F01L2820/01 ,  C22C1/05 ,  B22F3/02 ,  B22F3/1007

Abstract: To provide a press-fitting, sintered valve seat having excellent valve coolability enabling use in high-efficiency engines, as well as excellent deformation resistance and wear resistance, first and second hard particles differing in hardness are dispersed in a total amount of 25-70% by mass in a network-shaped Cu matrix, the second hard particles having hardness of 300-650 HV0.1, lower than that of the first hard particles, and 0.08-2.2% by mass of P is contained in the sintered valve seat.

公开(公告)号：US20180224002A1

公开(公告)日：2018-08-09

申请号：US15851897

申请日：2017-12-22

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Shouji KATSUMATA

IPC: F16K1/36 ,  F16K1/12

CPC classification number: F16K1/36 ,  F01L1/00 ,  F01L3/02 ,  F01L2103/00 ,  F16K1/12

Abstract: An engine valve for an internal-combustion engine includes: a head part including a main surface facing a combustion chamber of the internal-combustion engine and a valve face coming in contact with a valve seat; a stem part extending along a direction of movement of the engine valve; and a neck part between the head part and the stem part. A material of the stem part is heat-resistant steel. A material of the head part is a high-λ material such as aluminum, an aluminum alloy, tungsten steel, chrome steel, low-chrome steel, and low-carbon steel.

公开(公告)号：US10036287B2

公开(公告)日：2018-07-31

申请号：US15219594

申请日：2016-07-26

Applicant: TPR CO., LTD.

Inventor： Yoshio Koyama ,  Shohtaroh Hara

IPC: B22F3/24 ,  F01L3/02 ,  B22F1/00 ,  C22C30/00 ,  C22C38/02 ,  C22C38/52 ,  C22C38/58 ,  C23C8/10 ,  B22F5/00 ,  C22C33/02 ,  C22C1/10 ,  C21D6/00 ,  C21D9/00 ,  C22C32/00 ,  C22C38/10 ,  C23C8/14

CPC classification number: F01L3/02 ,  B22F1/0059 ,  B22F5/008 ,  B22F2301/15 ,  B22F2301/35 ,  B22F2302/10 ,  B22F2302/25 ,  C21D6/007 ,  C21D9/0068 ,  C22C1/1078 ,  C22C30/00 ,  C22C32/001 ,  C22C33/02 ,  C22C33/0207 ,  C22C33/0257 ,  C22C33/0285 ,  C22C38/02 ,  C22C38/10 ,  C22C38/52 ,  C22C38/58 ,  C23C8/10 ,  C23C8/14 ,  F01L2101/00 ,  F01L2101/02 ,  F01L2103/00 ,  F01L2820/01 ,  F16K25/005

Abstract: The valve seat includes an iron-based sintered alloy subjected to oxidation treatment, which is obtained by subjecting an iron-based sintered alloy including: 4 mass % to 15 mass % of Co particles; and hard particles each containing at least one compound of an intermetallic compound, a carbide, a silicide, a nitride, or a boride that has one or more kinds of elements selected from group 4a to 6a elements in a periodic table, and having a hardness of from 600 HV to 1,600 HV to oxidation treatment, and which has an oxide mainly including triiron tetraoxide (Fe3O4) and cobalt oxide (CoO) formed on a surface and in an interior of the iron-based sintered alloy. The iron-based sintered alloy subjected to oxidation treatment has an area ratio of the oxide of from 5% to 25% in a cross section thereof in a state prior to installation on the cylinder head.

公开(公告)号：US20180171836A1

公开(公告)日：2018-06-21

申请号：US15735729

申请日：2016-05-20

Applicant: Bleistahl-Produktions GmbH & Co KG

Inventor： Ingwar Hunsche ,  Christian Blecking ,  Ekkehard Kohler

IPC: F01L3/08 ,  F01L3/02 ,  B22F3/16 ,  B22F5/00 ,  B23K20/12 ,  C22C38/20 ,  C22C38/04

CPC classification number: F01L3/08 ,  B22F3/16 ,  B22F5/008 ,  B22F2301/35 ,  B23K20/12 ,  B23K2103/04 ,  C22C38/04 ,  C22C38/20 ,  F01L3/02 ,  F01L2101/00 ,  F01L2103/00

Abstract: The invention relates to a valve guide manufactured by powder-metallurgical processes for combustion engines, said guide comprising a central section, a cam-side end piece and a duct-side end piece, wherein the central section consists of a first material and the duct-side end piece of a second material, with the cam-side and/or duct-side end piece being infiltrated with copper.

公开(公告)号：US20180163579A1

公开(公告)日：2018-06-14

申请号：US15567785

申请日：2015-05-06

Applicant: VOLVO TRUCK CORPORATION

Inventor： Alexander ANJEVIK ,  Henrik KARLSSON

IPC: F01L3/02 ,  B22F5/00 ,  B22F3/15 ,  B22F3/10

CPC classification number: F01L3/02 ,  B22F3/1007 ,  B22F3/15 ,  B22F5/008 ,  B22F2201/11 ,  B22F2201/20 ,  B22F2301/35 ,  F02F7/0085

Abstract: A valve seat insert for an internal combustion engine has a first portion that is adapted to contact a cylinder head and a second portion that is adapted to contact a valve. The valve seat insert has a valve seat insert volume. A major part of the valve seat insert volume includes a homogeneous material that includes nitrides.

公开(公告)号：US09957854B2

公开(公告)日：2018-05-01

申请号：US14546361

申请日：2014-11-18

Applicant: Mahle International GmbH

Inventor： Alexander Puck ,  Christoph Steinmetz

IPC: F01L3/20

CPC classification number: F01L3/20 ,  B23K20/06 ,  F01L3/02 ,  F01L3/10 ,  Y10T29/49298

Abstract: A valve for a valve device may include a valve stem, which in an axial direction relative to a valve stem axis merges into a valve disc projecting from the valve stem radially. A valve cap may be included composed of a metal. The valve cap may be attached to an axial end portion of the valve stem facing away from the valve disc. The valve cap may cover a face end of the valve stem facing away from the valve disc and may envelope the axial end portion of the valve stem at least partially.