GB1254317A - Improvements in or relating to exhaust gas muffler means - Google Patents

Improvements in or relating to exhaust gas muffler means

Info

Publication number
GB1254317A
GB1254317A GB5846068A GB5846068A GB1254317A GB 1254317 A GB1254317 A GB 1254317A GB 5846068 A GB5846068 A GB 5846068A GB 5846068 A GB5846068 A GB 5846068A GB 1254317 A GB1254317 A GB 1254317A
Authority
GB
United Kingdom
Prior art keywords
chamber
absorption
chambers
exhaust pipe
exhaust
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5846068A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marelli Corp
Original Assignee
Nihon Radiator Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP6277568U external-priority patent/JPS4620120Y1/ja
Application filed by Nihon Radiator Co Ltd filed Critical Nihon Radiator Co Ltd
Publication of GB1254317A publication Critical patent/GB1254317A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N1/00—Silencing apparatus characterised by method of silencing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2490/00—Structure, disposition or shape of gas-chambers
    • F01N2490/15—Plurality of resonance or dead chambers
    • F01N2490/155—Plurality of resonance or dead chambers being disposed one after the other in flow direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2490/00—Structure, disposition or shape of gas-chambers
    • F01N2490/20—Chambers being formed inside the exhaust pipe without enlargement of the cross section of the pipe, e.g. resonance chambers

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Silencers (AREA)

Abstract

1,254,317. Exhaust silencers. NIHON RADIATOR CO. Ltd. Dec. 9, 1968 [May 20, 1968; July 24, 1968], No.58460/68. Heading F1B . An exhaust gas silencer comprises an exhaust pipe 20 along which is arranged a plurality of closed-ended absorption chambers 21 at least one of which is designed to absorb low frequency pulsations according to the formula f = 1/2##kg/W where f is the resonant frequency of the chamber, g is the gravitational acceleration, W is the maximum pressure of the pressure waves entering the absorption chamber and K represents the elastic co-efficient of the chamber, K being equal to AkPo(S/Ho) where A is a constant, k is the polytropic component, Po is the maximum pressure in the absorption chamber, S is the cross-sectional area of the chamber inlet and Ho is the mean width of the chamber. In Fig. 5 the chamber 21 is fitted inside the exhaust pipe and comprises a chamber 25 with a closed end 28 facing downstream and open end 27 upstream, the gas entering through 27 flowing oil through orifices 29. In Fig.4 the absorption chambers 13 surround the exhaust pipe. Numerous shapes of absorption chambers are shown, including spheroidal Fig. 16 (not shown) cylindrical Fig.14 (not shown) and annular Fig. 9 (not shown) . In Fig. 20 the pipe is divided by longitudinal baffles 122 and transverse baffles arranged to provide a series of chambers through which the gas proceeds in a generally helical direction.
GB5846068A 1968-05-20 1968-12-09 Improvements in or relating to exhaust gas muffler means Expired GB1254317A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3356968 1968-05-20
JP6277568U JPS4620120Y1 (en) 1968-07-24 1968-07-24

Publications (1)

Publication Number Publication Date
GB1254317A true GB1254317A (en) 1971-11-17

Family

ID=26372278

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5846068A Expired GB1254317A (en) 1968-05-20 1968-12-09 Improvements in or relating to exhaust gas muffler means

Country Status (3)

Country Link
DE (1) DE1817209A1 (en)
FR (1) FR1598565A (en)
GB (1) GB1254317A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2874233A1 (en) * 2004-08-16 2006-02-17 Pauline Blain Sound wave attenuation system for e.g. heat engine, has semi-sphere diffusing gas/sound or air/sound mixture, where sound waves contained in gas or air reflects inside another semi-sphere for rising in counter-direction of mixture in space
CN114635778A (en) * 2020-12-16 2022-06-17 双叶产业株式会社 Exhaust pipe

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2738601C2 (en) * 1977-01-18 1986-11-27 Nihon Radiator Co., Ltd., Tokio/Tokyo silencer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2874233A1 (en) * 2004-08-16 2006-02-17 Pauline Blain Sound wave attenuation system for e.g. heat engine, has semi-sphere diffusing gas/sound or air/sound mixture, where sound waves contained in gas or air reflects inside another semi-sphere for rising in counter-direction of mixture in space
CN114635778A (en) * 2020-12-16 2022-06-17 双叶产业株式会社 Exhaust pipe

Also Published As

Publication number Publication date
DE1817209A1 (en) 1969-12-04
FR1598565A (en) 1970-07-06

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