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公开(公告)号：US11643991B2
公开(公告)日：2023-05-09
申请号：US16931298
申请日：2020-07-16
摘要： A power cylinder system for a reciprocating engine includes a piston configured to move within a cylinder of the reciprocating engine. The system also includes a groove extending circumferentially about the piston and configured to support a ring. An axially-facing surface of the groove has circumferential undulations at ambient temperatures that are configured to compensate for distortions to the groove caused by operation of the reciprocating engine.
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公开(公告)号：US11041456B2
公开(公告)日：2021-06-22
申请号：US15934742
申请日：2018-03-23
申请人： Quest Engines, LLC , Steve Blom
IPC分类号： F02F1/18 , F02M63/00 , F16C3/10 , F02F3/28 , F02B75/22 , F02F1/20 , F02F1/24 , F01L1/04 , F01L13/00 , F01L1/08 , F01L1/18 , F01L1/38 , F01L1/28 , F02B33/04 , F01L3/20 , F02B75/32 , F01B9/02 , F02B33/26 , F02F3/02 , F01L1/24
摘要： Internal combustion engines having a split crankshaft are disclosed. The engines may also have non-circular, preferably rectangular, cross-section pistons and cylinders. The pistons may include a skirt with a field of pockets that provide a ringless, non-lubricated, seal equivalent. The pistons also may have a domed piston head with depressions thereon to facilitate the movement of air/charge in the cylinder. The engines also may use multi-stage poppet valves in lieu of conventional poppet valves. The engines may use the pumping motion of the engine piston to supercharge the cylinder with air/charge. The engines also may operate in an inverted orientation in which the piston is closer to the local gravitationally dominant terrestrial body's center of gravity at top dead center position than at bottom dead center position.
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公开(公告)号：US10975798B2
公开(公告)日：2021-04-13
申请号：US16537817
申请日：2019-08-12
申请人： Mark Engelmann
发明人： Mark Engelmann
摘要： An enhanced piston for improving the efficiency of an internal combustion engine has a cylinder with a combustion chamber and a lower cylinder portion. A cylinder head is disposed on the cylinder. An enhanced piston is moveably disposed within the cylinder and is connected to a piston rod. The enhanced piston has a piston cavity. There is an upper piston valve connected to an upper piston valve rod. The upper piston valve is disposed within the piston cavity wherein the upper piston valve selectively seals said piston cavity from the combustion chamber. A piston cavity port is disposed on a bottom portion of the piston cavity and is selectively opened and closed with a lower piston valve. The lower piston valve seals the piston cavity port from the lower cylinder portion. This way the gases are selectively sealed in the piston cavity under pressure until released in the combustion chamber.
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公开(公告)号：US20200088128A1
公开(公告)日：2020-03-19
申请号：US16574470
申请日：2019-09-18
发明人： Naoyuki SUDA
摘要： A piston for an internal combustion engine has a plurality of recesses formed in a skirt including an upper, a lower, and a central portion. The recesses in the upper portion close to an upper boundary of the central portion have lower ends located upwardly at a given distance away from the upper boundary. The recesses in the central portion close to the upper boundary have upper ends located downwardly at the given distance away from the upper boundary. The recesses in the lower portion close to the lower boundary have upper ends located downwardly at the given distance away from the lower boundary. The recesses in the central portion closer to the lower boundary have lower ends located upwardly at the given distance away from the lower boundary. This enhances lubrication between the piston and an inner wall of a cylinder bore and reduces a friction loss of the piston.
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公开(公告)号：US10526953B2
公开(公告)日：2020-01-07
申请号：US15934625
申请日：2018-03-23
申请人： Quest Engines, LLC , Steve Blom
IPC分类号： F02B33/04 , F02F1/18 , F02B33/30 , F02B29/04 , F01L3/20 , F02F3/02 , F02F3/28 , F01M11/04 , F01M11/00
摘要： Internal combustion engines having non-circular, preferably rectangular, cross-section pistons and cylinders are disclosed. The pistons may include a skirt with a field of pockets that provide a ringless, non-lubricated, seal equivalent. The pistons also may have a domed piston head with depressions thereon to facilitate the movement of air/charge in the cylinder. The engines also may use multi-stage poppet valves in lieu of conventional poppet valves, and a split crankshaft. The engines may use the pumping motion of the engine piston to supercharge the cylinder with air/charge. The engines also may operate in an inverted orientation in which the piston is closer to the local gravitationally dominant terrestrial body's center of gravity at top dead center position than at bottom dead center position.
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公开(公告)号：US20190128212A1
公开(公告)日：2019-05-02
申请号：US15798208
申请日：2017-10-30
摘要： Methods and systems are provided for actively heating pistons in combustion chambers to decrease a torque imbalance in an engine. In one example, a method for operation of an engine includes determining a variation between compression ratios in a first combustion chamber and a second combustion chamber and operating a piston heating system to apply a targeted amount of heat to a first piston assembly based on the variation between the compression ratios, the first piston assembly including a first piston positioned within the first combustion chamber.
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公开(公告)号：US20190063604A1
公开(公告)日：2019-02-28
申请号：US16081163
申请日：2016-03-30
摘要： A piston in which a solid lubricant resin layer made of a resin containing a solid lubricant is formed at a skirt portion. A guide groove absent area where no guide groove is formed, which is provided in a predetermined range of the solid lubricant resin layer at a center portion in a width direction. The guide grooves directing from the both ends in the width direction of the guide groove absent area to both ends in the width direction of the skirt portion. The end portions of the guide grooves extended to end edges of the solid lubricant resin layer to form open ends. The solid lubricant resin layer and the guide grooves are formed at least at a thrust side skirt portion. The guide grooves are formed in a shape inclined upward from the guide groove absent area toward the end edges of the solid lubricant resin layer.
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公开(公告)号：US20180283316A1
公开(公告)日：2018-10-04
申请号：US15937293
申请日：2018-03-27
申请人： Quest Engines, LLC
摘要： Internal combustion engines having pistons with one or more depressions located on the piston head to facilitate the movement of air/charge in the cylinder are disclosed. The pistons may include a skirt with a field of pockets that provide a ringless, non-lubricated, seal equivalent. The piston head also may be domed to further facilitate the movement of air/charge in the cylinder. The engines may also have non-circular, preferably rectangular, cross-section pistons and cylinders. The engines also may use multi-stage poppet valves in lieu of conventional poppet valves, and may include a split crankshaft. The engines may use the pumping motion of the engine piston to supercharge the cylinder with air/charge. The engines also may operate in an inverted orientation in which the piston is closer to the local gravitationally dominant terrestrial body's center of gravity at top dead center position than at bottom dead center position.
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公开(公告)号：US20180283313A1
公开(公告)日：2018-10-04
申请号：US15765283
申请日：2016-10-13
发明人： Klaus Lormes , Edward Werninghaus
IPC分类号： F02F3/02
摘要： A piston for an internal combustion engine including a piston head having supporting skirt wall sections which are arranged on the bottom side of the piston head. Connecting walls extending from a pin boss are connected to the skirt wall sections in a central zone of the skirt wall which is in the form of a segment of a circle.
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公开(公告)号：US09828938B2
公开(公告)日：2017-11-28
申请号：US15163405
申请日：2016-05-24
发明人： Naoyuki Suda , Kunio Hayakawa
CPC分类号： F02F3/10 , F02F3/022 , F02F3/28 , F05C2225/00
摘要： A resin coat film 39 formed on a skirt portion 10 of a piston 7 has a four-sided outer peripheral region knurled at upper and lower regions thereof corresponding in a rear view of the piston 7 to an upper skirt part 36 and a lower skirt part 38 of the skirt portion 10 extending in parallel with an axial direction of left and right piston pin boss portions 15 and 14, with a combination of short vertical grooves 43A and 43B and medium-length vertical grooves 42A and 42B extending in parallel with a central axis C of a piston crow portion 9, and at left and right edge regions thereof, with long vertical grooves 41.
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