Patents-Review.com
ClassID:

137768 ⎘

F01N1/166 - CPC Classification

Classification description:

Silencing apparatus characterised by method of silencing by using movable parts for changing gas flow path through the silencer or for adjusting the dimensions of a chamber or a pipe

Recent Application in this class:
#1
20250389215
2025-12-25

CONVERTIBLE SILENCER

 #2
20250067201
2025-02-27

Dual Mode Muffler

 #3
20250043706
2025-02-06

CONVERTIBLE SILENCER

 #4
20230374923
2023-11-23

MUFFLER SYSTEM WITH PNEUMATICALLY ACTUATED BYPASS VALVE

 #5
20230212968
2023-07-06

EXHAUST SILENCING DEVICE AND SYSTEM, VEHICLE, AND EXHAUST SILENCING METHOD

 #6
20230193796
2023-06-22

MUFFLER VALVE AND MUFFLER

 #7
20220356823
2022-11-10

After-market replacement kit to temporarily bypass a vehicle's muffler silencer resonators to improve exhaust sound, performance, fuel economy and other characteristics

 #8
20220298941
2022-09-22

Exhaust sound tuning system and method

 #9
20220220874
2022-07-14

Exhaust system and muffler

 #10
20220205377
2022-06-30

Car provided with an exhaust system with aerodynamic effect

 #11
20220205376
2022-06-30

Exhaust system for an internal combustion engine

 #12
20220099007
2022-03-31

Exhaust system

 #13
20220055765
2022-02-24

Exhaust System For Aerial Vehicle

 #14
20220010715
2022-01-13

Exhaust heat recovery apparatus for vehicle having a longitudinal valve separating two parallel exhaust flow paths

 #15
20210222595
2021-07-22

Exhaust tuning system and method

 #16
20210155258
2021-05-27

Vehicle sound attenuation

 #17
20210115824
2021-04-22

Methods and systems for an exhaust muffler system

 #18
20210033008
2021-02-04

Exhaust system for an internal combustion engine

 #19
20200378285
2020-12-03

Exhaust heat recovery system

 #20
20200276969
2020-09-03

Methods and systems for exhaust tuning valve diagnostics

 #21
20200256228
2020-08-13

Vacuum Pumps For Single And Multi-Process Chamber Flow Stream Sharing

 #22
20200173321
2020-06-04

Silencer for fuel cell vehicles

 #23
20200063664
2020-02-27

Exhaust control valve of saddle-riding vehicle

 #24
20200063621
2020-02-27

DEVICE FOR REGULATING DISPLACEMENT

 #25
20190360374
2019-11-28

Exhaust valve damper

 #26
20190360373
2019-11-28

Passive flap valve for vehicle exhaust system

 #27
20190323612
2019-10-24

Piloted exhaust line valve and corresponding production method

 #28
20190323396
2019-10-24

Muffler comprising a Helmholtz resonator and a vehicle comprising such a muffler

 #29
20190301340
2019-10-03

Muffler having movable baffle and control method of the same

 #30
20190234277
2019-08-01

Fluid flow network for a vehicle including flow members that respond to a flow imbalance

 #31
20190226601
2019-07-25

VALVE CONTROLLER

 #32
20190226371
2019-07-25

Muffler

 #33
20190195100
2019-06-27

Selective acoustic soundproofing device

 #34
20190176810
2019-06-13

Methods and systems for exhaust tuning valve diagnostics

 #35
20190136739
2019-05-09

Vehicle exhaust device

 #36
20190120102
2019-04-25

Muffler valve device for vehicle

 #37
20190120101
2019-04-25

Method for variable position exhaust tuning valve diagnostics

 #38
20190085744
2019-03-21

Exhaust device for internal combustion engine

 #39
20190078476
2019-03-14

Exhaust device for internal combustion engine

 #40
20190055867
2019-02-21

Muffler with selected exhaust pathways

 #41
20190055866
2019-02-21

Exhaust device for internal combustion engine

 #42
20180355778
2018-12-13

Exhaust heat recovery and acoustic valve

 #43
20180326837
2018-11-15

Valve assembly

 #44
20180252131
2018-09-06

Exhaust system for an internal combustion automotive engine

 #45
20180245501
2018-08-30

Changeover valve

 #46
20180238208
2018-08-23

Vehicle including cabin disturbance mitigation system

 #47
20180202344
2018-07-19

Exhaust system for an internal combustion automotive engine

 #48
20180128189
2018-05-10

Exhaust gas flap

 #49
20180128145
2018-05-10

METHOD AND SYSTEM FOR AN EXHAUST DIVERTER VALVE

 #50
20170350287
2017-12-07

Road vehicle with an internal combustion engine and provided with a device for the transmission of the exhaust noise

 #51
20170335741
2017-11-23

Muffler for an exhaust system of an internal combustion engine, especially for motor vehicles with hybrid drive

 #52
20170335729
2017-11-23

Slip-type active noise control muffler and method for controlling the same

 #53
20170298793
2017-10-19

Selectively tunable exhaust noise attenuation device

 #54
20170204756
2017-07-20

Passive exhaust valve assembly with overlapping slip joint and method of forming and installation

 #55
20170198617
2017-07-13

Exhaust system for an internal combustion engine and method for operating the exhaust system

 #56
20170191390
2017-07-06

Silencer

 #57
20170133003
2017-05-11

Sound generator for mounting on a vehicle to manipulate vehicle noise

 #58
20170122155
2017-05-04

Muffler with selected exhaust pathways

 #59
20170107875
2017-04-20

Exhaust valve for muffler and muffler including the same

 #60
20170058733
2017-03-02

Exhaust system for an internal combustion engine

 #61
20160376953
2016-12-29

Exhaust muffler

 #62
20160341096
2016-11-24

Valve device for exhaust flow passage

 #63
20160333756
2016-11-17

Muffler

 #64
20160326924
2016-11-10

Variable valve

 #65
20160222848
2016-08-04

Exhaust muffler

 #66
20160169075
2016-06-16

Combination exhaust gas heat exchanger/noise reduction member

 #67
20160160718
2016-06-09

Triple baffled muffler

 #68
20160084127
2016-03-24

Exhaust muffler device for combustion engine

 #69
20160053658
2016-02-25

Exhaust system for an internal combustion engine and method for operating the exhaust system

 #70
20160024989
2016-01-28

Exhaust gas system for an internal combustion engine and method for operating the exhaust gas system

 #71
20150354421
2015-12-10

Muffler

 #72
20150330283
2015-11-19

Tailor to fit muffler

 #73
20150152760
2015-06-04

Muffler

 #74
20150053500
2015-02-26

System of controlling exhaust sound of vehicle automatically and method of the same

 #75
20150040544
2015-02-12

Structure for utilizing exhaust heat of vehicle

 #76
20150027566
2015-01-29

Valve device for exhaust gas flow path

 #77
20140318888
2014-10-30

Silencer arrangement

 #78
20140223891
2014-08-14

Two-stroke lean burn gas engine with a silencer-catalytic converter

 #79
20140166394
2014-06-19

Exhaust system for an internal combustion engine

 #80
20140158462
2014-06-12

VARIABLE VALVE FOR EXHAUST PIPE

 #81
20140034171
2014-02-06

Bi-directional tractor exhaust system

 #82
20130247865
2013-09-26

Silencer for exhaust systems

 #83
20130247849
2013-09-26

Shunt pulsation trap for positive displacement (PD) internal combustion engines (ICE)

 #84
20130118615
2013-05-16

Apparatus for diverting a flow of material

 #85
20120210701
2012-08-23

Exhaust-gas muffler

 #86
20120181106
2012-07-19

Exhaust Assembly For Use With A Combustion Engine

 #87
20120168245
2012-07-05

Exhaust pipe part and exhaust apparatus for internal combustion engine

 #88
20120111662
2012-05-10

ENGINE EXHAUST

 #89
20120055734
2012-03-08

Exhaust flow control device for exhaust muffler

 #90
20120024507
2012-02-02

Muffler with a built-in heat exchanger

 #91
20110303864
2011-12-15

Aperture-shaped variable valve

 #92
20110197572
2011-08-18

SMART EXHAUST GAS FLOW CONTROL APPARATUS

 #93
20110061969
2011-03-17

Snap-action valve for exhaust system

 #94
20110048848
2011-03-03

Muffler apparatus for vehicle

 #95
20110030352
2011-02-10

Two-stroke lean burn gas engine with a silencer/catalytic converter

 #96
20110000201
2011-01-06

Exhaust system for an internal combustion engine

 #97
20100307864
2010-12-09

AUTOMOTIVE MUFFLER HAVING MEANS FOR SWITCHING BETWEEN LOUD AND QUIETER MODES

 #98
20100294589
2010-11-25

Snap action valve with inertia damper

 #99
20100193283
2010-08-05

Noise reduction system

 #100
20100192559
2010-08-05

Passive valve assembly with negative start angle

 #101
20100170743
2010-07-08

High-performance muffler assembly with multiple modes of operation

 #102
20100163337
2010-07-01

Muffler

 #103
20100146957
2010-06-17

Exhaust system of an internal combustion engine

 #104
20100140014
2010-06-10

Flow Passage Control Valve for Muffler

 #105
20100126159
2010-05-27

Valve for a motor vehicle exhaust silencer, and silencer comprising a valve of this type

 #106
20100071992
2010-03-25

Muffler assembly

 #107
20090229913
2009-09-17

Dual Mode Exhaust Muffler

 #108
20090229912
2009-09-17

Muffler

 #109
20090229911
2009-09-17

VARIABLE GEOMETRY MUFFLER FOR AN EXHAUST SYSTEM OF AN INTERNAL COMBUSTION ENGINE

 #110
20090211841
2009-08-27

Exhaust system for internal combustion engine having temperature variable acoustics

 #111
20080245605
2008-10-09

METHOD AND APPARATUS FOR CONTROLLING ENGINE EXHAUST SOUND FOR VEHICLES

 #112
20080245063
2008-10-09

Snap-action valve for exhaust system

 #113
20080236941
2008-10-02

Exhaust system for saddle-ride type vehicle

 #114
20080224083
2008-09-18

Snap-action valve for exhaust system

 #115
20080223025
2008-09-18

Snap-action valve for exhaust system

 #116
20080156578
2008-07-03

VARIABLE GEOMETRY MUFFLER FOR AN EXHAUST SYSTEM OF AN INTERNAL COMBUSTION ENGINE

 #117
20080104950
2008-05-08

Exhaust Gas Heat Exchanger, Especially for Motor Vehicles

 #118
20080093161
2008-04-24

Rear muffler assembly

 #119
20080072579
2008-03-27

Two-stroke lean burn gas engine with a silencer/catalytic converter

 #120
20080053078
2008-03-06

Two-stroke lean burn gas engine with a silencer/catalytic converter

 #121
20080053066
2008-03-06

Exhaust device for motorcycle

 #122
20070261395
2007-11-15

Diesel exhaust system variable backpressure muffler

 #123
20070256673
2007-11-08

MOTORCYCLE DYNAMIC EXHAUST SYSTEM

 #124
20070246294
2007-10-25

Exhaust noise control for motorcycles

 #125
20070246292
2007-10-25

Sound adjustable device for coupling to an engine and method for manufacturing thereof

 #126
20070245713
2007-10-25

Two-stroke lean burn gas engine with a silencer/catalytic converter

 #127
20070227807
2007-10-04

High-performance muffler assembly with multiple modes of operation

 #128
20070107981
2007-05-17

Exhaust silencer

 #129
20070095606
2007-05-03

Internal combustion engine exhaust line muffler

 #130
20070074507
2007-04-05

Exhaust system with secondary performance respective torque control/regulation

 #131
20070045044
2007-03-01

Flow-through mufflers with optional thermo-electric, sound cancellation, and tuning capabilities

 #132
20070045043
2007-03-01

Muffler for an exhaust gas system

 #133
20070028597
2007-02-08

Exhaust valve for two-stroke engine

 #134
20060292974
2006-12-28

Method of operating a change-over element of an exhaust system for vehicle

 #135
20060254843
2006-11-16

Switchable loud and quiet exhaust apparatus

 #136
20060249328
2006-11-09

Muffler for motor vehicle

 #137
20060191255
2006-08-31

Method and device of a particle filter for an exhaust system, silencer including such a device, and a combustion engine driven vehicle

 #138
20060162995
2006-07-27

Muffler for an exhaust gas system

 #139
20060151238
2006-07-13

Tail gunner exhaust muffler

 #140
20060150620
2006-07-13

Exhaust gas control valve

 #141
20060150619
2006-07-13

Exhaust passage control valve

 #142
20060065477
2006-03-30

Muffler

 #143
20060054381
2006-03-16

Exhaust heat recovery muffler

 #144
20060027420
2006-02-09

Semi-active muffler

 #145
20060000205
2006-01-05

Motorcycle dynamic exhaust system

 #146
20050262835
2005-12-01

Two-stroke lean burn gas engine with a silencer/catalytic converter

 #147
20050257517
2005-11-24

Automotive exhaust valve

 #148
20050247051
2005-11-10

Exhaust treatment control system for an internal combustion engine

 #149
20050178612
2005-08-18

Electrically controlled in-muffler exhaust valve for use during cylinder deactivation

 #150
20050155816
2005-07-21

Dynamic exhaust system for advanced internal combustion engines

 #151
20050067219
2005-03-31

Method and apparatus for exhaust sound attenuation on engines with cylinder deactivation

 #152
20050061580
2005-03-24

Flow altering valve for vehicular exhaust system

 #153
20050011699
2005-01-20

Muffler

 #154
17165284
2023-04-25

Marine drives and idle relief exhaust systems for marine drives

 #155
16029807
2019-07-23

Exhaust valve and active noise control for compact exhaust system

 #156
15812265
2020-07-28

Exhaust sound enhancement assembly and method for a marine propulsion device