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公开(公告)号：US12092016B2
公开(公告)日：2024-09-17
申请号：US17809530
申请日：2022-06-28
发明人： Thomas G. Leone , Michael Czekala
摘要： Methods and systems are provided for a pre-chamber. In one example, a system includes a pre-chamber and a piston arranged in a combustion chamber. The piston and/or combustion chamber comprise one or more features configured to force squish flow into the pre-chamber.
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公开(公告)号：US11952957B2
公开(公告)日：2024-04-09
申请号：US18214429
申请日：2023-06-26
申请人： BYD COMPANY LIMITED
发明人： Qiang Wang , Nan Zhang , Shiyi Pan , Shuguang Zhang , Peng Guo
CPC分类号： F02F1/4214 , F02F1/4285 , F02F3/28 , F02F1/242 , F02F2001/245
摘要： An engine includes a cylinder block, a cylinder head, and a piston. The cylinder head is connected to the cylinder block. The piston is movably connected to the cylinder block. The cylinder block, the cylinder head, and the piston form a combustion chamber. The cylinder head includes an intake valve hole and an exhaust valve hole. An intake valve is disposed at the intake valve hole and an exhaust valve is disposed at the exhaust valve hole. A barrier protrusion is protruded at the edge of the intake valve hole away from the exhaust valve hole. The included angle between a first connecting line connecting a first end of the barrier protrusion and a center of the intake valve hole and a second connecting line connecting a second end of the barrier protrusion and the center of the intake valve hole is greater than 120 degrees and less than or equal to 180 degrees.
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公开(公告)号：US11946435B2
公开(公告)日：2024-04-02
申请号：US17699456
申请日：2022-03-21
发明人： Matt Svrcek
摘要： The present disclosure provides an open-faced piston with a circumferential groove into which a piston ring assembly is arranged. Openings at the bottom of the circumferential groove and between a front land of the open-faced piston and the piston face are provided. The openings are arranged to allow for a combustion reaction to propagate through the volume defined between the bottom of the piston ring assembly and the piston face such that at least a portion of an air and fuel mixture located in that volume is reacted.
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公开(公告)号：US20230332556A1
公开(公告)日：2023-10-19
申请号：US18214429
申请日：2023-06-26
申请人： BYD COMPANY LIMITED
发明人： Qiang WANG , Nan ZHANG , Shiyi PAN , Shuguang ZHANG , Peng GUO
CPC分类号： F02F1/4214 , F02F1/4285 , F02F3/28 , F02F2001/245
摘要： An engine includes a cylinder block, a cylinder head, and a piston. The cylinder head is connected to the cylinder block. The piston is movably connected to the cylinder block. The cylinder block, the cylinder head, and the piston form a combustion chamber. The cylinder head includes an intake valve hole and an exhaust valve hole. An intake valve is disposed at the intake valve hole and an exhaust valve is disposed at the exhaust valve hole. A barrier protrusion is protruded at the edge of the intake valve hole away from the exhaust valve hole. The included angle between a first connecting line connecting a first end of the barrier protrusion and a center of the intake valve hole and a second connecting line connecting a second end of the barrier protrusion and the center of the intake valve hole is greater than 120 degrees and less than or equal to 180 degrees.
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公开(公告)号：US11754017B2
公开(公告)日：2023-09-12
申请号：US17611420
申请日：2020-06-30
IPC分类号： F02F3/28
CPC分类号： F02F3/28
摘要： A piston of an internal combustion engine configured to be reciprocable along an axial direction in a cylinder includes a cavity formed to be recessed in a center of a piston top surface, and an outer circumferential edge portion located on a radially outer side of the cavity in the piston top surface. The cavity includes a lip portion, a raised portion, and a curved portion. The curved portion includes an outer circumference-side curved surface which includes a curved surface connected to the lip portion, an inner circumference-side concave surface which is located on a radially inner side of an outer circumference-side curved surface and includes a surface connected to a raised portion, the inner circumference-side concave surface including a deepest portion of the cavity, and a convex surface formed between the outer circumference-side curved surface and the inner circumference-side concave surface, as well as protruding upward.
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公开(公告)号：US20230235714A1
公开(公告)日：2023-07-27
申请号：US17581391
申请日：2022-01-21
申请人： Tenneco Inc.
发明人： Warran Lineton , Greg Salenbien
摘要： A steel piston with an engineered coating is provided. A high thermal conductivity material, for example copper, is disposed on first regions of a combustion bowl to reduce hot spots in the piston. A low thermal conductivity material, for example a ceramic, is disposed on second regions of the combustion bowl to reduce loss of heat through the piston. The high thermal conductivity material disposed on the combustion bowl has a surface roughness (Ra) of less than 5 μm to help reflect IR radiation and promote fuel flow. The low thermal conductivity material disposed on the combustion bowl has a surface roughness (Ra) of less than 3 μm to promote fuel flow. The low thermal conductivity material is also disposed on the bowl rim and top ring land, and has a surface roughness (Ra) of greater than 8 μm on the bowl rim and top ring land to retard gas flow.
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公开(公告)号：US20180179986A1
公开(公告)日：2018-06-28
申请号：US15389521
申请日：2016-12-23
申请人： Caterpillar Inc.
CPC分类号： F02F3/28 , F02B23/0672 , F02B77/08 , F02B2275/00 , F02F3/22 , F02F2200/00 , F02F2200/04 , Y02T10/125
摘要： A piston including a piston crown, the piston crown defining a combustion bowl with a bowl base and bottom surface. A failure initiation structure is provided on the bottom surface of the combustion bowl to initiate favorable fracture at predetermined loads. Such favorable fracture may lead to the a separation of a fragment of the bowl base from the combustion bowl when a predetermined load or pressure is exceeded within the combustion bowl.
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公开(公告)号：US20180119637A1
公开(公告)日：2018-05-03
申请号：US15338643
申请日：2016-10-31
申请人： Caterpillar Inc.
发明人： Bobby John , Jonathan W. Anders
CPC分类号： F02F3/28 , F02B23/0624 , F02F1/242 , F02F3/24 , F02M61/14
摘要： A piston has a piston crown portion forming at least one arcuate indent in aligned fashion with a fuel jet discharged into a combustion chamber. Each arcuate event forms lobes, which separate the fuel jet into portions, or is tiered, to accommodate fuel jet portions being discharged into the combustion chamber at different times. Each lobe or tier includes an entry surface, a recirculation surface and a wall to separate it from adjacent lobes or tiers, respectively.
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公开(公告)号：US20180058315A1
公开(公告)日：2018-03-01
申请号：US15806196
申请日：2017-11-07
申请人： ACHATES POWER, INC.
发明人： RISHIKESH VENUGOPAL
CPC分类号： F02B75/282 , F01B7/14 , F02B23/0621 , F02B23/0624 , F02B23/0651 , F02B23/066 , F02B23/0663 , F02B23/0675 , F02B23/0678 , F02B25/08 , F02F3/28 , F02M61/14 , Y02T10/125
摘要： A combustion chamber for an opposed-piston engine has a rotationally skewed shape in a longitudinal section that is orthogonal to a chamber centerline, between diametrically-opposed openings of the combustion chamber through which fuel is injected. The rotationally skewed shape interacts with swirl to generate a tumble bulk charge air motion structure that increases turbulence.
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公开(公告)号：US20180030921A1
公开(公告)日：2018-02-01
申请号：US15223993
申请日：2016-07-29
申请人： Caterpillar Inc.
发明人： David Montgomery
CPC分类号： F02F3/28 , F01L3/00 , F02F1/004 , F02F3/00 , F02P15/001
摘要： A piston for a premixed spark-ignited or premixed dual fuel internal combustion engine is disclosed. The piston may be configured to reciprocate along a longitudinal axis of a combustion chamber defined by a cylinder of the engine. The piston may comprise a piston head, a top annular groove configured to receive a top annular ring, and a skirt having a pin bore extending along a pin bore axis that is configured to receive a wrist pin for connecting the piston to a connecting rod. The piston may further comprise a top land formed in the piston head that is chamfered in a direction perpendicular to the pin bore axis such that the top land does not contact an inner wall of the cylinder when the piston rocks about the pin bore axis. The top land may be non-chamfered in a direction parallel to the pin bore axis.
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