公开(公告)号：US11933407B2

公开(公告)日：2024-03-19

申请号：US17784434

申请日：2020-12-03

申请人： KABUSHIKI KAISHA RIKEN

发明人： Hiroaki Saito ,  Yoshio Okada

IPC分类号： F16J9/26 ,  F16J9/12

CPC分类号： F16J9/26 ,  F16J9/12

摘要： To provide a long-life compression ring without an increase in the outer peripheral abrasion near the gap regardless of the ring material or the presence or absence of the outer peripheral hard coating, in an annular compression ring having a pair of gap faces opposed to each other to form a free gap and a nominal diameter d1 equal to an inner diameter of a cylinder to which the compression ring is attached to along with a piston, a self tangential force is 5N to 50N, and a radius of curvature R1 and the nominal diameter d1 satisfy a relationship:

−0.01≤(2R1−d1)/d1

公开(公告)号：US20240026971A1

公开(公告)日：2024-01-25

申请号：US17868523

申请日：2022-07-19

申请人： Mahle International GmbH ,  Mahle Metal Leve S/A

发明人： Bruno Fineto ,  Rafael Antonio Bruno ,  Rafael Bettini Rabello ,  Marcelo Moura De Oliveira

IPC分类号： F16J9/26 ,  F16J9/12

CPC分类号： F16J9/26 ,  F16J9/12

摘要： A piston ring may include a spacer or expansion element and/or two segments. The segments may have a radial dimension between approximately 1.50 mm and approximately 1.90 mm and a height between approximately 0.30 mm and approximately 0.40 mm. The segments may have a concave profile with recesses between approximately 0.015 mm and approximately 0.030 mm and a clearance of approximately 0.150 mm. The segments may be wound via a matrix box device and a roller. The piston ring may have a circularity, expressed in the form of a decomposition as a Fourier series, with an amplitude for orders higher than 10 which is not greater than 0.10 μm.

公开(公告)号：US11686199B2

公开(公告)日：2023-06-27

申请号：US17825928

申请日：2022-05-26

申请人： Aquarius Engines (A.M.) Ltd.

发明人： Shaul Haim Yaakoby

IPC分类号： F01B1/00 ,  F01L7/02 ,  F01N13/10 ,  F02B71/00 ,  F02B71/04 ,  F02B75/00 ,  F02F1/00 ,  F02F1/06 ,  F02F1/22 ,  F02F1/24 ,  F02F3/00 ,  F02F3/28 ,  F02M35/10 ,  F02M61/14 ,  F16J1/00 ,  F16J1/12 ,  F16J7/00 ,  F16J9/06 ,  F16J9/12 ,  F16J9/20 ,  F01B11/00 ,  F01B7/20 ,  F01N3/26 ,  F02B1/04 ,  F02B3/06 ,  F02B75/30

CPC分类号： F01B11/001 ,  F01L7/02 ,  F01N13/10 ,  F02B71/00 ,  F02B71/04 ,  F02B75/002 ,  F02F1/00 ,  F02F1/06 ,  F02F1/22 ,  F02F1/24 ,  F02F3/0015 ,  F02F3/28 ,  F02M35/1015 ,  F02M61/14 ,  F16J1/005 ,  F16J1/008 ,  F16J1/12 ,  F16J7/00 ,  F16J9/06 ,  F16J9/12 ,  F16J9/20 ,  F01B7/20 ,  F01N3/26 ,  F02B1/04 ,  F02B3/06 ,  F02B75/30

摘要： An internal combustion may include a cylinder having a first combustion chamber at one end and a second combustion chamber at an opposing end, first and second cylinder heads located at an end of the first and second combustion chambers, respectively, and a double-faced piston slidably mounted therein. The piston may be configured to move in a first stroke that includes an expansion stroke portion and a non-expansion stroke portion. The engine may further include first and second piston rod portions extending from opposite faces of the piston. A recess in the piston rod portions may be configured to communicate gases between a combustion chamber and locations outside the cylinder. There may also be a chamber surrounding the first or second piston rod portion, the chamber configured to be supplied with gas and the chamber being isolated from the first combustion chamber and the second combustion chamber.

公开(公告)号：US11560947B2

公开(公告)日：2023-01-24

申请号：US17179471

申请日：2021-02-19

申请人： TENNECO INC.

发明人： Norbert G. Schneider

IPC分类号： F16J9/12 ,  F02F3/00

摘要： A piston for a high temperature internal combustion engine is provided. The piston includes an upper wall, base wall, outer rib, and inner rib defining a cooling chamber therebetween, and a plurality of ring grooves formed in the outer rib. Only the second ring groove is formed with the keystone cross-section, and all of the other ring grooves are formed with the conventional rectangular cross-section. Thus, the piston can be formed with low manufacturing costs and can also provide exceptional performance when used in high temperature combustion engines, wherein the temperature at the first ring groove is greater than 280° C., and thus prevents carbon from depositing or burns off any carbon deposits, but the temperature at the second ring groove is between 200° C. and 280° C., in which case carbon deposits can form and cause the piston ring to stick.

公开(公告)号：US11519504B1

公开(公告)日：2022-12-06

申请号：US17550152

申请日：2021-12-14

申请人： Norwich Technologies, Inc.

发明人： Troy McBride ,  Jonathan Lynch ,  Joel Stettenheim ,  Oliver James Brambles ,  Leif Kilkenny Johnson ,  Per Erik Kristoffer Edstrom

IPC分类号： F16J9/12 ,  F16J9/06 ,  F03C1/00 ,  F03C1/007

摘要： A piston ring configured to be disposed in a floating piston for use in a vessel of a thermal energy storage system to separate a hot working fluid from a cold working fluid, wherein the piston ring comprises of a plurality of arc segments, each arc segment interconnected by a joint.

公开(公告)号：US11466777B2

公开(公告)日：2022-10-11

申请号：US16321459

申请日：2017-07-27

申请人： Mahle Metal Leve S/A ,  Mahle International GmbH

发明人： Eliel Dos Santos Paes

IPC分类号： F16J9/26 ,  F16J9/12 ,  C23C14/02 ,  C23C14/06 ,  C23C28/00 ,  C23C28/04

摘要： A sliding element for an internal combustion engine may include a base material having an annular external surface. The external surface may include a bonding layer, a first layer of coating, and a second layer of coating sequentially disposed thereon. The first layer of coating and the second layer of coating may include hard amorphous carbon (DLC) of a combined matrix having a plurality of sp3/sp2 bonds. The first layer of coating may include 45% sp3 bonds or less and may have a thickness of at least 10 micrometers. The second layer of coating may include at least 55% sp3 bonds and may have a thickness of at least 3 micrometers.

公开(公告)号：US11454259B2

公开(公告)日：2022-09-27

申请号：US16750664

申请日：2020-01-23

申请人： DRiV Automotive Inc.

发明人： Bart Van Mieghem ,  Geert Sas

IPC分类号： F15B15/14 ,  F16J15/3236 ,  F16J15/3232 ,  F16J9/12 ,  B60G17/027

摘要： An assembly includes a spring seat, a spring seat insert, and a seal. The spring seat is slidable along the spring seat insert to define an expandable fluid chamber therebetween. The spring seat includes a groove defining a mating surface. The seal is between the spring seat and the spring seat insert. The seal includes a mating portion at the first end engageable with the mating surface of the groove to prevent fluid from exiting the fluid chamber.

公开(公告)号：US11441480B2

公开(公告)日：2022-09-13

申请号：US16976221

申请日：2019-02-27

申请人： MTU FRIEDRICHSHAFEN GMBH

发明人： Rolf Pfeifer ,  Ion Madan ,  Vadzim Khakholka ,  Dietmar Ackermann ,  Patrick Stoeckle

IPC分类号： F02B77/08 ,  F01M11/10 ,  F02D41/22 ,  F16J9/12 ,  G01M13/00 ,  G01M13/026 ,  G01M13/04 ,  G01M15/05 ,  G05B23/02 ,  G07C5/00

摘要： A method for operating an internal combustion engine with a motor, having a moving machine part and at least one machine element which retains the moving machine part and is subject to wear, such as, for example, a supporting, sealing, guiding or the like retaining machine element that is subject to wear during operation relative to the moving machine part, which machine element, because of the wear, is service-life-limiting for the operation of the internal combustion engine, wherein—for the operation of the internal combustion engine, a service-life-limiting time interval until the next maintenance of the internal combustion engine is specified, and—the internal combustion engine has a number of service-life-limiting machine elements, wherein for the at least one service-life-limiting machine element a remaining service life is forecast and the service-life-limiting time interval is determined therefrom.

公开(公告)号：US20220154667A1

公开(公告)日：2022-05-19

申请号：US17454144

申请日：2021-11-09

申请人： VOLVO TRUCK CORPORATION

发明人： Arne ANDERSSON

IPC分类号： F02F3/28 ,  F02M21/02 ,  F01M11/02 ,  F01M1/02 ,  F01M1/16 ,  F01N3/00 ,  F16J9/12

摘要： A piston arrangement for a clean combustion engine, such as a hydrogen engine. The piston arrangement comprises a piston configured for reciprocal movement inside a cylinder having a cylinder wall, the piston having a piston head configured to face a first compartment with pressurized gas, a sealing arrangement comprising at least one sealing ring configured to be arranged to seal the piston to the cylinder wall and separating the first compartment from a second compartment, and a water channel extending from an interior of the piston to the sealing ring to provide water for lubricating the sealing ring. The piston head comprises a pumping element configured to be arranged to pressurize the water in the water channel by pressurised gas in the first compartment.

公开(公告)号：US11002216B1

公开(公告)日：2021-05-11

申请号：US16804110

申请日：2020-02-28

申请人： Caterpillar Inc.

发明人： Jaswinder Singh ,  Kenth I. Svensson

IPC分类号： F02F1/00 ,  F02F1/16 ,  F16J9/12

摘要： An engine includes a cylinder liner and a piston movable within the cylinder liner, a crevice formed between a top land of the piston and the cylinder liner, and an oil entry clearance formed between a top ring of the piston and the cylinder liner. The engine also includes an abnormal combustion inhibitor having an oil recapture surface exposed to the crevice and oriented to limit migration of oil from the crevice toward a combustion chamber in the engine. The abnormal combustion inhibitor includes a groove structure having as a substrate at least one of the cylinder liner or the piston. Related methodology is also disclosed.