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    MUFFLER AND OUTLET STUB FOR A MUFFLER
    1.
    发明申请
    MUFFLER AND OUTLET STUB FOR A MUFFLER 有权

    公开(公告)号：US20250012208A1

    公开(公告)日：2025-01-09

    申请号：US18764975

    申请日：2024-07-05

    Applicant: Andreas Stihl AG & Co. KG

    Inventor： Mario Kuschewski ,  Martin Nitze

    IPC: F01N1/08

    Abstract: A muffler having a muffler housing with a muffler chamber formed therein includes an outlet stub. In the stub, a channel is formed through which exhaust gases escape. The channel has a throttle location with a smallest flow cross-section and a discharge opening with a discharge flow cross-section. The channel is bounded by a wall. The flow cross-section increases substantially continuously from the smallest flow cross-section to the discharge flow cross-section at least in a section in the direction from the throttle location to the discharge opening. The stub has a fastening location at which it is held in an outlet opening of the muffler housing. The wall is closed continuously over its circumference from the throttle location to the discharge opening. The section of the channel extends in a sectional plane containing a center axis of the channel into a longitudinal section of the stub having the fastening location.

    EXHAUST SOUND ATTENUATION AND CONTROL SYSTEM
    2.
    发明公开
    EXHAUST SOUND ATTENUATION AND CONTROL SYSTEM 审中-公开

    公开(公告)号：US20240352881A1

    公开(公告)日：2024-10-24

    申请号：US18759015

    申请日：2024-06-28

    Applicant: GREGORY M. MAROCCO ,  GREGORY J. COLLETTI

    Inventor： GREGORY M. MAROCCO ,  GREGORY J. COLLETTI

    IPC: F01N1/08 ,  F01N1/02

    CPC classification number: F01N1/083 ,  F01N1/02 ,  F01N2470/02

    Abstract: The exhaust sound attenuation and control system includes an outer housing having an inlet pipe and an outlet pipe at opposite ends thereof. The interior of the housing includes upper, central, and lower exhaust sound attenuation elements. The exhaust gasses from the inlet pipe first enter the upper element and an upper arcuate flow guide directs the gasses leaving the upper element into the central element. A lower arcuate flow guide directs the gasses leaving the central element into the lower element. Gasses exiting the lower element are directed into the outlet pipe and exit the system. The upper element functions primarily as a muffler while the central and lower elements function as both a muffler and a resonator. The upper element includes a central elongated pipe surrounded by an outer housing. The central element includes a plurality of baffle elements. The lower element includes a plurality of baffle plates.

    SOUND-ABSORBING SILENCER HAVING DIFFUSE REFLECTION STRUCTURE
    4.
    发明公开
    SOUND-ABSORBING SILENCER HAVING DIFFUSE REFLECTION STRUCTURE 审中-公开

    公开(公告)号：US20240183294A1

    公开(公告)日：2024-06-06

    申请号：US18387532

    申请日：2023-11-07

    Applicant: Nam Do BAEK ,  Geun Uk BAEK

    Inventor： Nam Do BAEK ,  Geun Uk BAEK

    IPC: F01N1/08

    CPC classification number: F01N1/082 ,  F01N2210/06

    Abstract: Disclosed is a sound-absorbing silencer having a diffuse reflection structure. The silencer includes a housing including an inlet and an outlet formed in respective ends thereof to allow noise to be introduced thereinto and discharged therefrom and a noise-attenuating unit disposed in the housing to attenuate noise through diffuse reflection and absorption of the noise. The noise-attenuating unit includes a first diffuse reflection pipe disposed in the housing while being spaced apart from the housing, at least one second diffuse reflection pipe accommodated in the first diffuse reflection pipe while being spaced apart from the first diffuse reflection pipe to form a noise-attenuating path therebetween so that noise is diffusely reflected and absorbed while flowing through the noise-attenuating path, and a sound-absorbing member disposed between the first diffuse reflection pipe and the housing and in the second diffuse reflection pipe to absorb noise diffusely reflected in the noise-attenuating path.

    Work vehicle
    5.
    发明授权
    Work vehicle 有权

    公开(公告)号：US11946402B2

    公开(公告)日：2024-04-02

    申请号：US17975942

    申请日：2022-10-28

    Applicant: Kubota Corporation

    Inventor： Masaru Shinya ,  Tatsuya Nishimura

    IPC: F01N13/08 ,  F01N1/08

    CPC classification number: F01N13/082 ,  F01N1/084 ,  F01N2470/24

    Abstract: A work vehicle includes: a first exhaust pipe to which engine exhaust is sent; and a second exhaust pipe that has an inlet having an outer diameter larger than an outlet of the first exhaust pipe, the outlet of the first exhaust pipe and the inlet of the second exhaust pipe being disposed in proximity such that the outlet of the first exhaust pipe is positioned inside the inlet of the second exhaust pipe; a partition that divides a cross section of the outlet of the first exhaust pipe into a plurality of divided regions when viewed from the flow direction and partitions the adjacent divided regions at intervals.

    Muffler
    6.
    发明授权
    Muffler 有权

    公开(公告)号：US11859523B2

    公开(公告)日：2024-01-02

    申请号：US17647192

    申请日：2022-01-06

    Applicant: HONEYWELL INTERNATIONAL INC.

    Inventor： Morris G. Anderson ,  Swarna Sinha ,  Daniel Brown

    IPC: F01N1/08 ,  F01N1/00

    CPC classification number: F01N1/083 ,  F01N1/006

    Abstract: 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.

    Exhaust system noise reduction device of vehicle
    7.
    发明授权
    Exhaust system noise reduction device of vehicle 有权

    公开(公告)号：US11846216B2

    公开(公告)日：2023-12-19

    申请号：US17109712

    申请日：2020-12-02

    Applicant: Hyundai Motor Company ,  Kia Motors Corporation

    Inventor： Hyeon Gyun Ahn

    IPC: F01N1/02 ,  F01N1/08

    CPC classification number: F01N1/023 ,  F01N2470/04 ,  F01N2470/14 ,  F01N2490/08 ,  F01N2490/155

    Abstract: An exhaust system noise reduction device of a vehicle enables an exhaust system to contribute to an increase in engine output while reducing engine exhaust noise. The exhaust system noise reduction device includes a muffler housing formed to airtightly surround a rear end section of an exhaust pipe; a branch pipe branched from a front end section of the exhaust pipe while having a rear end section of the branch pipe extend through the muffler housing; a barrier wall disposed at a peripheral surface of the rear end section of the exhaust pipe to divide an inner space of the muffler housing into a first chamber and a second chamber; and a punched portion formed at the rear end section of the branch pipe and disposed in the first chamber. A resonance chamber structure for reducing exhaust noise is formed in the first chamber, thereby reducing exhaust noise.

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