ClassID:

138121

F01N2470/14 - CPC Classification

Classification description:

Structure or shape of gas passages, pipes or tubes Plurality of outlet tubes, e.g. in parallel or with different length

Recent Application in this class:
#1
20250389217
2025-12-25

EXHAUST UNITS FOR ROAD VEHICLES

#2
20250297563
2025-09-25

SILENCER, COOLING SYSTEM, MOTOR SYSTEM AND GENERATOR SYSTEM

#3
20250264045
2025-08-21

EXHAUST PORT FOR A PNEUMATIC VALVE OR AN AIR VALVE OF A VEHICLE

#4
20240426233
2024-12-26

EXHAUST GAS SYSTEM FOR AN INTERNAL COMBUSTION ENGINE

#5
20240068392
2024-02-29

Method of controlling exhaust gas delivery between turbochargers

#6
20220403765
2022-12-22

Muffler and method for making a muffler

#7
20220316371
2022-10-06

Dual function exhaust system attachment

#8
20220275738
2022-09-01

Acoustically tuned muffler

#9
20220220874
2022-07-14

Exhaust system and muffler

#10
20220099007
2022-03-31

Exhaust system

#11
20220049635
2022-02-17

Gas flow and sound control valve for exhaust gas system

#12
20220034256
2022-02-03

Turbocharger manifold, system, and method

#13
20220025793
2022-01-27

Method and apparatus for converting a vehicle from a dual-in, single-out exhaust system to a dual-in, dual-out exhaust system

#14
20210355850
2021-11-18

Exhaust system noise reduction device of vehicle

#15
20210189937
2021-06-24

Aftertreatment system for mixing a reductant in an exhaust gas flowing therethrough

#16
20210148262
2021-05-20

Multi-mode exhaust muffler

#17
20210131323
2021-05-06

Muffler for vehicle for implementing sporty exhaust sound

#18
20200318510
2020-10-08

Exhaust muffler

#19
20200318509
2020-10-08

Exhaust device for internal combustion engine of saddled vehicle

#20
20200256227
2020-08-13

EXHAUST SYSTEM AS WELL AS MOTOR VEHICLE WITH AN EXHAUST SYSTEM

#21
20200191039
2020-06-18

Cross-pipe exhaust system

#22
20200102877
2020-04-02

Pulse exhaust pipe and diesel engine installed with pulse exhaust pipe

#23
20190338690
2019-11-07

Muffler assembly including a center muffler and two satellite mufflers

#24
20190337377
2019-11-07

Muffler assembly including a center muffler and two satellite mufflers

#25
20190323396
2019-10-24

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

#26
20190301323
2019-10-03

Vehicle muffler

#27
20190249588
2019-08-15

Muffler unit

#28
20190218956
2019-07-18

Exhaust orifice tube for vehicle mufflers

#29
20190178124
2019-06-13

Acoustically tuned muffler

#30
20190153925
2019-05-23

Pipe and metal sheet subassembly for an exhaust treatment device

#31
20190128221
2019-05-02

Customizable engine air intake/exhaust systems

#32
20190120115
2019-04-25

Silencer insert, silencer comprising the same and method for manufacturing a silencer insert

#33
20190107025
2019-04-11

Diesel exhaust fluid mixing

#34
20190107019
2019-04-11

Acoustically tuned muffler

#35
20190024549
2019-01-24

Method for forming a collar in a muffler housing

#36
20180374473
2018-12-27

Exhaust system sound generation assembly unit

#37
20180252131
2018-09-06

Exhaust system for an internal combustion automotive engine

#38
20180238208
2018-08-23

Vehicle including cabin disturbance mitigation system

#39
20180202344
2018-07-19

Exhaust system for an internal combustion automotive engine

#40
20180149068
2018-05-31

Internal combustion engine

#41
20180016956
2018-01-18

Engine and engine-driven working machine

#42
20170335741
2017-11-23

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

#43
20170211439
2017-07-27

Exhaust gas system for an internal combustion engine

#44
20170184006
2017-06-29

Exhaust system

#45
20170184001
2017-06-29

Catalytic converter and exhaust-gas aftertreatment arrangement

#46
20170183994
2017-06-29

Exhaust device structure for rocking vehicle

#47
20170074132
2017-03-16

Exhaust system for internal combustion engine

#48
20170058732
2017-03-02

Exhaust system having variable exhaust gas paths

#49
20170002716
2017-01-05

ENGINE HAVING INTEGRATED EXHAUST MANIFOLD WITH COMBINED DUCTS FOR INSIDE CYLINDERS AND OUTSIDE CYLINDERS

#50
20160333828
2016-11-17

Catalytic converter

#51
20160333756
2016-11-17

Muffler

#52
20160311314
2016-10-27

Working vehicle

#53
20160169078
2016-06-16

Exhaust gas system of a motor vehicle

#54
20160084127
2016-03-24

Exhaust muffler device for combustion engine

#55
20160076437
2016-03-17

Apparatus and system for directing exhaust gas flow

#56
20160053659
2016-02-25

Exhaust device of motorcycle

#57
20150354421
2015-12-10

Muffler

#58
20150330283
2015-11-19

Tailor to fit muffler

#59
20150255054
2015-09-10

Active design of exhaust sounds

#60
20150204280
2015-07-23

Gas flow unit, a gas treatment device and a combustion engine provided therewith

#61
20140311821
2014-10-23

Exhaust muffler

#62
20140291067
2014-10-02

Exhaust silencing device

#63
20140290232
2014-10-02

Exhaust pipe structure for internal combustion engine

#64
20140116801
2014-05-01

Silencer and a method for producing same

#65
20140060963
2014-03-06

Exhaust system for a motorcycle

#66
20140044612
2014-02-13

After-treatment system

#67
20140034171
2014-02-06

Bi-directional tractor exhaust system

#68
20130263582
2013-10-10

Split Flow Exhaust Deflector

#69
20130239547
2013-09-19

Integrated WGS/ECD exhaust treatment device for internal combustion engine having an EGR loop

#70
20130220732
2013-08-29

Muffler with dual exhaust gas discharge pipe for vehicle

#71
20130213734
2013-08-22

Horizontally installed muffler having sporty tone

#72
20130019590
2013-01-24

DYNAMICALLY ADJUSTING TUNED EXHAUST SYSTEM

#73
20120301364
2012-11-29

Motor vehicle exhaust system

#74
20120260631
2012-10-18

Method and device for regenerating a particle filter in a Y-exhaust gas system

#75
20120228055
2012-09-13

Exhaust device for internal combustion engine

#76
20120210687
2012-08-23

Filter for internal combustion engines

#77
20120151916
2012-06-21

APPARATUS AND SYSTEM FOR DIRECTING EXHAUST GAS FLOW

#78
20120111663
2012-05-10

Resonator for a dual-flow exhaust system

#79
20120085589
2012-04-12

Muffler for vehicle

#80
20120060778
2012-03-15

Cylinder head for an internal combustion engine

#81
20120000181
2012-01-05

Exhaust system having an aftertreatment module

#82
20110219749
2011-09-15

Exhaust system having multiple inlets and multiple outlets

#83
20110197572
2011-08-18

SMART EXHAUST GAS FLOW CONTROL APPARATUS

#84
20100275594
2010-11-04

Exhaust heat recovery system

#85
20100270103
2010-10-28

Exhaust muffler

#86
20100170744
2010-07-08

Motor vehicle exhaust line silencer

#87
20100146957
2010-06-17

Exhaust system of an internal combustion engine

#88
20100146955
2010-06-17

X-tube and corresponding exhaust system

#89
20100083920
2010-04-08

Cylinder head for an internal combustion engine

#90
20090301807
2009-12-10

Exhaust muffler for exhaust system

#91
20090283126
2009-11-19

Apparatus for generating electrical power from the waste heat of an internal combustion engine

#92
20090229913
2009-09-17

Dual Mode Exhaust Muffler

#93
20090145687
2009-06-11

Motorcycle exhaust muffler

#94
20090025664
2009-01-29

INTERNAL COMBUSTION ENGINE

#95
20090014238
2009-01-15

Muffler

#96
20090014237
2009-01-15

Exhaust muffler having a horizontally extending sound attenuation chamber

#97
20090000863
2009-01-01

Exhaust pipe

#98
20080245605
2008-10-09

METHOD AND APPARATUS FOR CONTROLLING ENGINE EXHAUST SOUND FOR VEHICLES

#99
20080229735
2008-09-25

INTAKE AND EXHAUST TUNING SYSTEM

#100
20080219767
2008-09-11

Road finisher

#101
20080110162
2008-05-15

Cover member for plural exhaust pipes

#102
20080098599
2008-05-01

Processes for producing exhaust gas manifolds

#103
20080093161
2008-04-24

Rear muffler assembly

#104
20080053066
2008-03-06

Exhaust device for motorcycle

#105
20080035418
2008-02-14

Exhaust sound and emission control systems

#106
20080023265
2008-01-31

Combination Silencer

#107
20070261398
2007-11-15

Intake and exhaust tuning system

#108
20070102224
2007-05-10

Exhaust system of motorcycle and motorcycle including exhaust system

#109
20070068150
2007-03-29

Mixing element for an exhaust gas system

#110
20070045043
2007-03-01

Muffler for an exhaust gas system

#111
20060292974
2006-12-28

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

#112
20060243822
2006-11-02

Dynamically adjusting tuned exhaust system

#113
20060231330
2006-10-19

Spun extrusion side entry muffler

#114
20060150620
2006-07-13

Exhaust gas control valve

#115
20060107656
2006-05-25

Exhaust gas after-treatment unit with countercurrent housing and corresponding process for exhaust gas after-treatment

#116
20060040158
2006-02-23

Fuel cell discharge-gas processing device

#117
20050279571
2005-12-22

Exhaust sound and emission control systems

#118
20050172588
2005-08-11

Particulate filter assembly

#119
20050133301
2005-06-23

Muffler for internal combustion engine

#120
20050115229
2005-06-02

Muffler with an integrated catalytic converter

#121
18781461
2025-07-29

Exhaust system valve diagnostics

#122
17662626
2023-09-05

Cross-pipe exhaust assembly