ClassID:

137769

F01N1/168 - CPC Classification

Classification description:

Silencing apparatus characterised by method of silencing by using movable parts for controlling or modifying silencing characteristics only

Recent Application in this class:
#1
20230147854
2023-05-11

Methods and system for de-icing a valve of an exhaust system

#2
20220298941
2022-09-22

Exhaust sound tuning system and method

#3
20220056827
2022-02-24

Method for interlocking engine exhaust sound with traveling mode and exhaust system for smart vehicle

#4
20220049635
2022-02-17

Gas flow and sound control valve for exhaust gas system

#5
20210033008
2021-02-04

Exhaust system for an internal combustion engine

#6
20200276969
2020-09-03

Methods and systems for exhaust tuning valve diagnostics

#7
20200049040
2020-02-13

Exhaust flap for an exhaust system of a motor vehicle, controller for such an exhaust flap, and method for operating such an exhaust flap

#8
20190301340
2019-10-03

Muffler having movable baffle and control method of the same

#9
20190292969
2019-09-26

Gasoline particulate filter diagnostics

#10
20190249580
2019-08-15

MUFFLING APPARATUS

#11
20190195100
2019-06-27

Selective acoustic soundproofing device

#12
20190176810
2019-06-13

Methods and systems for exhaust tuning valve diagnostics

#13
20190136739
2019-05-09

Vehicle exhaust device

#14
20190120101
2019-04-25

Method for variable position exhaust tuning valve diagnostics

#15
20190055867
2019-02-21

Muffler with selected exhaust pathways

#16
20190048777
2019-02-14

Gasoline particulate filter diagnostics

#17
20180252131
2018-09-06

Exhaust system for an internal combustion automotive engine

#18
20180238208
2018-08-23

Vehicle including cabin disturbance mitigation system

#19
20180211646
2018-07-26

System and a method for attenuating sound produced by a vehicle

#20
20180080402
2018-03-22

Vehicle control unit

#21
20180016954
2018-01-18

Exhaust-gas system

#22
20170362976
2017-12-21

Exhaust system for an engine

#23
20170350287
2017-12-07

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

#24
20170335729
2017-11-23

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

#25
20170276041
2017-09-28

Muffler device including central common active control valve

#26
20170241354
2017-08-24

Wastegate control systems and methods for engine sound emission

#27
20170198617
2017-07-13

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

#28
20170122155
2017-05-04

Muffler with selected exhaust pathways

#29
20170107876
2017-04-20

Exhaust flow valve with revrumble feature

#30
20170067380
2017-03-09

Exhaust Assembly

#31
20170058734
2017-03-02

System and method for increasing engine sound during a downshift

#32
20170058733
2017-03-02

Exhaust system for an internal combustion engine

#33
20170058732
2017-03-02

Exhaust system having variable exhaust gas paths

#34
20160326924
2016-11-10

Variable valve

#35
20160160718
2016-06-09

Triple baffled muffler

#36
20160123210
2016-05-05

Exhaust control system

#37
20160053658
2016-02-25

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

#38
20160024989
2016-01-28

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

#39
20150192055
2015-07-09

Muffler

#40
20150027566
2015-01-29

Valve device for exhaust gas flow path

#41
20130175115
2013-07-11

Adjustable exhaust baffling device

#42
20130020147
2013-01-24

Tunable Muffler

#43
20120181106
2012-07-19

Exhaust Assembly For Use With A Combustion Engine

#44
20120010848
2012-01-12

Method for determining the rotation speed of a supercharger in an internal combustion engine

#45
20110127105
2011-06-02

MUFFLER FOR VEHICLE

#46
20100229543
2010-09-16

DEVICE FOR INFLUENCING AN EXHAUST GAS FLOW

#47
20100192559
2010-08-05

Passive valve assembly with negative start angle

#48
20100170743
2010-07-08

High-performance muffler assembly with multiple modes of operation

#49
20100126159
2010-05-27

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

#50
20100043398
2010-02-25

Dual exhaust system with independent valve control

#51
20090217668
2009-09-03

DEVICE FOR INFLUENCING AN EXHAUST GAS FLOW

#52
20080245605
2008-10-09

METHOD AND APPARATUS FOR CONTROLLING ENGINE EXHAUST SOUND FOR VEHICLES

#53
20070227807
2007-10-04

High-performance muffler assembly with multiple modes of operation

#54
20060254843
2006-11-16

Switchable loud and quiet exhaust apparatus

#55
18153723
2023-12-05

Engine and engine exhaust control system

#56
13789132
2016-03-15

Systems and methods for active exhaust noise cancellation