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EP3575567A1 - Diffuseur d'échappement destiné à un système de post-traitement d'un moteur à combustion interne et système de post-traitement comprenant ce diffuseur - Google Patents

Diffuseur d'échappement destiné à un système de post-traitement d'un moteur à combustion interne et système de post-traitement comprenant ce diffuseur Download PDF

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Publication number
EP3575567A1
EP3575567A1 EP19186385.1A EP19186385A EP3575567A1 EP 3575567 A1 EP3575567 A1 EP 3575567A1 EP 19186385 A EP19186385 A EP 19186385A EP 3575567 A1 EP3575567 A1 EP 3575567A1
Authority
EP
European Patent Office
Prior art keywords
diffuser
major
axis
minor
ats
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.)
Granted
Application number
EP19186385.1A
Other languages
German (de)
English (en)
Other versions
EP3575567B1 (fr
Inventor
Christian Krug
Antonio Benetti
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.)
Iveco SpA
Original Assignee
Iveco SpA
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Filing date
Publication date
Application filed by Iveco SpA filed Critical Iveco SpA
Publication of EP3575567A1 publication Critical patent/EP3575567A1/fr
Application granted granted Critical
Publication of EP3575567B1 publication Critical patent/EP3575567B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • F01N13/082—Other arrangements or adaptations of exhaust conduits of tailpipe, e.g. with means for mixing air with exhaust for exhaust cooling, dilution or evacuation
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/20—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having flared outlets, e.g. of fish-tail shape
    • 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
    • F01N2210/00—Combination of methods 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
    • F01N2590/00—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines
    • F01N2590/08—Exhaust or silencing apparatus adapted to particular use, e.g. for military applications, airplanes, submarines for heavy duty applications, e.g. trucks, buses, tractors, locomotives

Definitions

  • the present invention relates to the field of tail pipes of after treatment systems in particular comprising diffusers in order to lower the exhaust gas temperature.
  • the purpose of such devices is to lower the temperature of exhaust gas and mixing it with fresh air before being released into the environment.
  • the purpose of the present invention is to indicate a diffuser particularly suitable in those cases where the available space for ATS installation is limited and requires a compact ATS, in which a canning, housing the overall ATS, has a ratio, in absolute value, between two sizes within 1 and 4.
  • the present invention relates to an exhaust diffuser D, D' for an After Treatment System (ATS) of an internal combustion engine.
  • ATS After Treatment System
  • the diffuser comprises a first portion FP having a tubular frusto-pyramidal shape developing according to a first axis Y and has an inlet IN, IN', for receiving exhaust gas from said ATS, proximal to a minor basis MNB of the truncated pyramid and a second portion SP, contiguous with and subsequent to said first one, according to an exhaust gas circulation, wherein said second portion comprises two or more separate paths PTH communicating with the outside, arranged side-by-side between each other according to said developing axis Y.
  • Each path includes at least one ejector EJ arranged in such a way to suck fresh air from the outside of the diffuser.
  • a vane is cut by the casing itself of the second portion of the diffuser and is bent towards the inside of the second part so as it is superimposed to a corresponding hollow.
  • Each vane lefts open its hollow and defines a sort of ramp for the circulating gas. Therefore, the gas meets the ramp, and thus a local section reduction, thus, for the Venturi's effect, accelerates.
  • a low pressure is defined just after the ramp sucking fresh air from the outside of the device that is mixed with the exhaust gas in order to refresh the latter.
  • At least the first portion FP has a frusto-pydamidal shape with rectangular bases.
  • the second embodiment of the invention according to the figures 5 - 7 has the first FP and second portion SP in one piece defining as a whole a frusto-pyramid.
  • said second portion is defined inside the truncated-pyramid casing defining the diffuser.
  • frusto-pyramid is squeezed according to a second axis Z, perpendicular to said first axis Y, so as any cross-section perpendicular to said development axis is rectangular having two major and two minor segments corresponding to the two major UW, LW and the two minor MW walls of the frusto-pyramidal shape, wherein the minor segments have almost constant size along said development.
  • the second portion SP preferably comprises septum(s) SPT perpendicular to said major walls UW, LW of the frusto-pyramid, arranged in order to define said two or more separated paths PTH.
  • the first portion is (also) squeezed according to the second axis Z, perpendicular to said first axis and the second portion SP comprises two or more separate tubular pipes TM, each defining a path PTH, arranged substantially parallel between each other and pneumatically connected to a major basis MJB of the frusto-pyramid, opposite to the minor one MNB.
  • any cross-section perpendicular to said development axis Y of said first portion FP is rectangular having major and minor segments corresponding to the two major UW, LW and the two minor MW walls of the frusto-pyramidal shape and wherein said two major walls diverge reciprocally and said two minor walls diverge reciprocally toward said major basis MJB.
  • the inlet IN, IN' is arranged on one UW of said major walls close to said minor basis MNB and the minor basis is rounded and smoothly joined with the other wall LW of said two major walls in order to reduce turbulence.
  • Both the diffusers of the embodiments are provided with collars for a simple mounting on the outlet of the ATS disclosed according to the figures 3 , 4 and 7 .
  • V shaped flange FL has the opposite ends affixed to the ATS and the vertex affixed to the second portion of the diffuser.
  • the ATS has substantially a parallelepiped shape having a predominant development, parallel, within +/- 30°, with said first axis Y.
  • the parallelepiped shape can be rectangular.
  • the diffuser is arranged under the ATS, according to a vertical direction parallel to said second axis Z.
  • the end CT of said second portion SP corresponding to the outlet OUT of the diffuser D, D' is slightly bent downwardly in order to direct exhaust gas towards the ground.
  • Figure 8 discloses a compact ATS.
  • the ATS is defined "compact" because its sizes along the coordinate axes Z, Y, X are substantially comparable to each other, being in the mutual ratio of no more than 4.
  • the ATS is provided with flanges FL' to affix the ATS to the vehicle chassis. They are preferably parallel to the development axis Y of the ATS.
  • Said ATS schematizes the ones of the figures 3 , 4 and 7 sectioned according to the plane X-Z.
  • An inlet opening INL receives the combustion engine exhaust gas, represented by arrows FLW, which enters into a first chamber CH1, operatively communicating with a second chamber CH2 in which is housed the catalytic material on a carrier structure, which communicates with a third chamber CH3 turning the gas flow and orientating the flow lines for an accurate Lambda measurement, which communicates with a fourth CH4 chamber, made in a low part of the ATS, so as to be connected and communicating with the diffuser D, D' via the duct, schematized with the collar CL.
  • An ejector permits a flow of fresh air FAI to inter in the diffuser to lower the exhaust gas.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Catching Or Destruction (AREA)
EP19186385.1A 2016-09-15 2017-09-15 Diffuseur d'échappement destiné à un système de post-traitement d'un moteur à combustion interne et système de post-traitement comprenant ce diffuseur Active EP3575567B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102016000093139A IT201600093139A1 (it) 2016-09-15 2016-09-15 Diffusore di scarico per un sistema di post-trattamento di un motore a combustione interna e sistema di post-trattamento comprendente detto diffusore
EP17191403.9A EP3296534B1 (fr) 2016-09-15 2017-09-15 Système de post-traitement d'un moteur à combustion interne comprenant un diffuseur d'échappement

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP17191403.9A Division EP3296534B1 (fr) 2016-09-15 2017-09-15 Système de post-traitement d'un moteur à combustion interne comprenant un diffuseur d'échappement

Publications (2)

Publication Number Publication Date
EP3575567A1 true EP3575567A1 (fr) 2019-12-04
EP3575567B1 EP3575567B1 (fr) 2021-06-30

Family

ID=57796872

Family Applications (2)

Application Number Title Priority Date Filing Date
EP19186385.1A Active EP3575567B1 (fr) 2016-09-15 2017-09-15 Diffuseur d'échappement destiné à un système de post-traitement d'un moteur à combustion interne et système de post-traitement comprenant ce diffuseur
EP17191403.9A Active EP3296534B1 (fr) 2016-09-15 2017-09-15 Système de post-traitement d'un moteur à combustion interne comprenant un diffuseur d'échappement

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP17191403.9A Active EP3296534B1 (fr) 2016-09-15 2017-09-15 Système de post-traitement d'un moteur à combustion interne comprenant un diffuseur d'échappement

Country Status (3)

Country Link
EP (2) EP3575567B1 (fr)
ES (2) ES2747552T3 (fr)
IT (1) IT201600093139A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GR20200100510A (el) * 2020-08-24 2022-03-09 Αλεξανδρος Πχακαντζε Κυκλικο συστημα εξατμισης-διαχυτη

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4693084A (en) * 1986-07-25 1987-09-15 General Motors Corporation Charge cooler angle duct
US20070163247A1 (en) 2006-01-17 2007-07-19 Ryan Michael E Enclosed volume exhaust diffuser apparatus, system, and method
US20070289809A1 (en) * 2004-10-29 2007-12-20 Kim Soo W Exhaust Gas-Discharging Device of Vehicle
US20080110164A1 (en) 2006-11-14 2008-05-15 Tenneco Automotive Operating Company Inc. Device for lowering tail pipe exhaust temperature
US20100269493A1 (en) 2006-10-20 2010-10-28 Ford Global Technologies, Llc Exhaust system for an engine
DE102012214399A1 (de) * 2012-08-13 2014-02-13 Deere & Company Diffusoranordnung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4693084A (en) * 1986-07-25 1987-09-15 General Motors Corporation Charge cooler angle duct
US20070289809A1 (en) * 2004-10-29 2007-12-20 Kim Soo W Exhaust Gas-Discharging Device of Vehicle
US20070163247A1 (en) 2006-01-17 2007-07-19 Ryan Michael E Enclosed volume exhaust diffuser apparatus, system, and method
US20100269493A1 (en) 2006-10-20 2010-10-28 Ford Global Technologies, Llc Exhaust system for an engine
US20080110164A1 (en) 2006-11-14 2008-05-15 Tenneco Automotive Operating Company Inc. Device for lowering tail pipe exhaust temperature
DE102012214399A1 (de) * 2012-08-13 2014-02-13 Deere & Company Diffusoranordnung

Also Published As

Publication number Publication date
ES2747552T3 (es) 2020-03-10
EP3296534A1 (fr) 2018-03-21
EP3575567B1 (fr) 2021-06-30
IT201600093139A1 (it) 2018-03-15
ES2887282T3 (es) 2021-12-22
EP3296534B1 (fr) 2019-07-31

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