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公开(公告)号：US12084994B2
公开(公告)日：2024-09-10
申请号：US18156295
申请日：2023-01-18
发明人： Yasuto Takashiba
CPC分类号： F01L1/3442 , F01L2001/34426
摘要： There is provided a variable valve timing system for an engine in which a cam chain chamber is formed in a cylinder and a cylinder head, the variable valve timing system including: a variable valve device configured to change an opening and closing timing of a valve; an oil control valve configured to control a hydraulic pressure with respect to the variable valve device. The oil control valve is disposed on an outer surface of the cylinder, which is an outer wall of the cam chain chamber. An oil path enters the outer wall of the cam chain chamber from the oil control valve, and after extending toward a side of the cylinder head from a side of the cylinder, the oil path extends toward the variable valve device through an inner wall of the cam chain chamber through an oil pipe.
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公开(公告)号：US11859523B2
公开(公告)日：2024-01-02
申请号：US17647192
申请日：2022-01-06
发明人： Morris G. Anderson , Swarna Sinha , Daniel Brown
摘要： A muffler includes a housing defining a first chamber, a second chamber and a third chamber. The muffler includes at least a pair of nested protrusions in communication with an inlet. The pair of nested protrusions is coupled to a respective surface of a pair of plates disposed in the housing such that one of the pair of nested protrusions is spaced apart from and opposite another of the pair of nested protrusions to define a tortuous path that terminates at an outlet defined along an outer circumference. The first chamber is downstream from the pair of plates. The muffler includes a first tube fluidly coupled to the first chamber to direct the exhaust gases from the first chamber to the second chamber. The muffler includes a second tube fluidly coupled to the second chamber to direct the exhaust gases from the second chamber to the third chamber.
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公开(公告)号：US11852084B2
公开(公告)日：2023-12-26
申请号：US16832589
申请日：2020-03-27
申请人： AIRBUS HELICOPTERS
发明人： Nayibe Gomez
CPC分类号： F02D35/0007 , B64D27/02 , B64D27/10 , B64D27/24 , B64D31/06 , F01N1/00 , B64D2027/026
摘要： A method of optimizing the noise generated by a hybrid power plant of a rotorcraft in flight, the hybrid power plant driving a main rotor of the rotorcraft in rotation and being provided with at least one engine, with at least one electric machine, and with at least one electrical energy source that electrically powers the electric machine. The method includes a determination step for determining a required power delivered by the hybrid power plant and that is required for the flight phase, and a distribution step for distributing the required power between the at least one engine and the electric machine as a function of a target noise level and of the required power for the flight phase, as well as of a model for the noise generated by the at least one engine as a function of one of its parameters.
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公开(公告)号：US11702969B2
公开(公告)日：2023-07-18
申请号：US17746358
申请日：2022-05-17
发明人： Keith Bartu , Jeremy Popovich , Brett Herwat , Gabriel Ostromecki
IPC分类号： F01N1/08 , F01N1/00 , F01N1/02 , G10K11/16 , G10K11/172
CPC分类号： F01N1/083 , F01N1/003 , F01N1/006 , F01N1/02 , F01N1/023 , G10K11/161 , G10K11/172 , F01N2210/04 , F01N2470/14 , F01N2470/18 , F01N2490/10 , F01N2490/15
摘要： A muffler for receiving exhaust gas from a combustion engine comprises a shell, first and second inlet pipes each having outlets providing exhaust gas to a mixing chamber within the shell, a first chamber and a second chamber positioned within the shell and a pair of communication pipes each including an inlet receiving exhaust gas from the mixing chamber. Each communication pipe includes an outlet providing exhaust to the second chamber. Each of the communication pipes further includes a Helmholtz opening positioned downstream of the mixing chamber. The Helmholtz openings are open to the first chamber.
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公开(公告)号：US11639676B2
公开(公告)日：2023-05-02
申请号：US16443282
申请日：2019-06-17
摘要： A vehicle exhaust system includes a tubular component having an inner surface and an outer surface. The vehicle exhaust system also includes at least one opening defined by the tubular component. The at least one opening extends through each of the inner surface and the outer surface. The vehicle exhaust system further includes a patch adapted to cover the at least one opening. The patch includes a first portion extending parallel to the central axis. The first portion defines a plurality of pores. The first portion covers the at least one opening. The patch also includes a second portion extending away from the first portion. The first portion has a first thickness and the second portion has a second thickness.
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公开(公告)号：US11485510B2
公开(公告)日：2022-11-01
申请号：US16870178
申请日：2020-05-08
申请人： VIETTEL GROUP
发明人： Hung Cuong Tran , Van Quyen Pham , Van Su Nguyen , Van Hung Tran
IPC分类号： F02K1/34 , B64C39/02 , F01N1/02 , G10K11/172 , G10K11/162 , F01N1/00
摘要： The dual inlet exhaust design for the flying device incorporates easy-to-assemble designs with low number of components, suitable for limited space and small volume requirements, good performance. The exhaust is designed as a three-chamber cylinder with two coaxial inlet pipes running through the two chambers on both sides, extending into the middle compartment. The width of the two inlet tubes in the middle compartment is different. The inlet pipe at the two compartments on both sides has a bore. The outlet tube is located in the middle compartment, deviating to the side with a smaller expansion inlet, with the longitudinal axis of the outlet tube passing through the inlet tube.
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公开(公告)号：US11415031B2
公开(公告)日：2022-08-16
申请号：US16040913
申请日：2018-07-20
发明人： Paul Vanleene
IPC分类号： F01N1/08 , B21B17/02 , B21D53/88 , B21D19/02 , F01N13/18 , B21D22/14 , F01N1/02 , B21D22/18 , B21D19/08 , F01N1/00 , F01N13/08
摘要： Method for forming a collar in a muffler shell including: providing a muffler shell made of a metal sheet and forming a muffler housing, the muffler shell having an exhaust gas opening, providing a collar forming head having a rotational axis and at least two movable expanders, introducing a collar forming head into a muffler housing, moving the expanders of the collar forming head introduced into the muffler shell radially away from the rotational axis of the collar forming head from a retracted position to an expanded position rotating the collar forming head around the of the collar forming head, bringing the rotating expanded collar forming head in contact with the metal sheet forming an outwardly projecting collar around the exhaust gas opening by flaring the edge of the metal sheet.
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公开(公告)号：US11377995B2
公开(公告)日：2022-07-05
申请号：US17098127
申请日：2020-11-13
申请人： KAWASAKI JUKOGYO KABUSHIKI KAISHA , NICHIDAI FILTER CORPORATION , SHINBA IRON WORKS CORPORATION
摘要： A muffler is detachably attached to an engine. A catalyst for purifying exhaust gas is provided upstream of the muffler, and a secondary air valve for supplying air to an exhaust passage is provided upstream of the catalyst. The catalyst and the secondary air valve are integrally unitized. A catalyst unit including the catalyst and the secondary air valve is provided between the engine and the muffler.
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公开(公告)号：US11236652B2
公开(公告)日：2022-02-01
申请号：US16085264
申请日：2017-01-13
发明人： Keisuke Kishikawa , Yoji Fukui , Kazuya Yoshio , Takuya Otsuka
IPC分类号： F01N1/16 , F01N1/06 , F01N1/00 , F01N1/08 , F01N13/02 , F01N1/18 , F01N13/00 , F01N13/14 , F01N1/02 , F01N3/28 , F01N13/08 , B62K11/04
摘要： An exhaust muffler is made up of a plurality of layers including an exhaust passage pipe and expansion chambers, and includes a front assembly and a rear assembly sub-assembled separately from the front assembly. The front assembly includes a front exhaust passage pipe, a front muffler body disposed in covering relation to the outside of the front exhaust passage pipe and cooperating with the front exhaust passage pipe in making up double-walled pipes, and an exhaust valve disposed in the front exhaust passage pipe. The rear assembly includes a rear exhaust passage pipe and a rear muffler body disposed in covering relation to the outside of the rear exhaust passage pipe and cooperating with the rear exhaust passage pipe in making up double-walled pipes. There is thus provided an exhaust device for an internal combustion engine in which the accuracy of a position where the exhaust valve is installed is high.
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公开(公告)号：US11199116B2
公开(公告)日：2021-12-14
申请号：US15955252
申请日：2018-04-17
发明人： Gabriel Ostromecki , Ankit Barot
摘要： A muffler for receiving exhaust gas from a combustion engine may include a shell, an inlet pipe, at least one outlet pipe, one or more baffles, and an internal communication pipe. The inlet pipe may extend through the shell. The outlet pipe may be in fluid communication with the inlet pipe and may be at least partially disposed within the shell. The baffles are disposed within the shell and cooperate with the shell to define a plurality of chambers. The internal communication pipe may be disposed entirely within the shell and may be in fluid communication with the inlet pipe. The internal communication pipe may include an inlet opening and first and outlet openings. The first outlet opening is open to and in direct fluid communication with one of the chambers. The second outlet opening is open to and in direct fluid communication with another one of the chambers.
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