EP2379857A1 - Systèmes d'échappement pour véhicules - Google Patents

Systèmes d'échappement pour véhicules

Info

Publication number
EP2379857A1
EP2379857A1 EP09775150A EP09775150A EP2379857A1 EP 2379857 A1 EP2379857 A1 EP 2379857A1 EP 09775150 A EP09775150 A EP 09775150A EP 09775150 A EP09775150 A EP 09775150A EP 2379857 A1 EP2379857 A1 EP 2379857A1
Authority
EP
European Patent Office
Prior art keywords
treatment unit
cage
outlet
exhaust
gas treatment
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.)
Withdrawn
Application number
EP09775150A
Other languages
German (de)
English (en)
Inventor
Johann Dobler
Robert Heisler
Roman Bucher
Capelle Thorsten
Robert Honzek
Hans Heinle
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.)
AGCO GmbH and Co
Original Assignee
AGCO GmbH and Co
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
Application filed by AGCO GmbH and Co filed Critical AGCO GmbH and Co
Publication of EP2379857A1 publication Critical patent/EP2379857A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • F01N13/18—Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805—Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K13/00—Arrangement in connection with combustion air intake or gas exhaust of propulsion units
    • B60K13/04—Arrangement in connection with combustion air intake or gas exhaust of propulsion units concerning exhaust
    • 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
    • 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

  • This invention relates to exhaust systems for vehicles, and in particular to such systems for agricultural and/or industrial tractors, which includes and exhaust gas treatment unit to reduce the level of gas contaminants to the legally required levels.
  • an exhaust system for a vehicle having a cab and an internal combustion engine located in an engine compartment including an exhaust gas treatment unit located outside the engine compartment and having an inlet which receives exhaust gases from the engine and an outlet which passes treated gases into a final portion of the exhaust system, the treatment unit being arranged to extend generally vertically with the outlet generally vertically above the inlet and adjacent a corner post of the cab of the vehicle to reduce impact on the visibility from the cab.
  • a cage surrounds the exhaust gas treatment unit and has a support means for attachment to a chassis of the vehicle and an outlet to which the outlet of the treatment unit is connected, and the final portion of the exhaust system is connected with and supported from the cage outlet to relieve the treatment unit from supporting the weight of the final portion of the exhaust system.
  • Such an exhaust system can be fitted with the final portion of the exhaust system extending generally vertically and positioned close to the right-hand A-pillar of the tractor cab where it has only a small impact on visibility.
  • the design of the treatment unit can be simplified and made cheaper and useable in different engine installations or, under certain circumstances, a standard unit kit can be used.
  • the unit is completely isolated by using shock-absorbing and vibration-absorbing means, pressure surges caused by exhaust gas are reduced.. Since such treatment units involve catalytic coatings on relatively fragile support materials the fact that the treatment unit is not stressed by the weight or vibrations of the final portion of the exhaust system is an additional advantage.
  • back pressure can be reduced to improve exhaust gas flow.
  • Urea solutions can be injected into the exhaust system further away from the treatment unit and will thus mix fully with the exhaust gases prior to reaching the treatment unit without requiring a mixer which would introduce back pressure.
  • the mixing area is mainly outside the engine compartment, the urea solution is not heated up which would tend to reduce it's efficiency or destroy the Urea. Also by injecting the Urea into the system closer to the hot turbo charger improved operation of the system is obtained.
  • the cage has an upper portion with the cage outlet and a lower portion with the support means, the upper and lower portion being detachably interconnected to give access to the treatment unit for servicing/replacement.
  • the upper and lower portions of the cage may be provided with generally vertically extending fingers which extend towards each other and whose adjacent ends are interconnected to support the upper portion of the cage from the lower portion.
  • the invention also provides an exhaust system for an internal combustion engine for a vehicle, the system including:- an exhaust gas treatment unit having an inlet and an outlet; a cage which surrounds the exhaust gas treatment unit and has a support means for attachment to a chassis of the vehicle and an outlet to which the outlet of the treatment unit is connected, and a final portion of the exhaust system connected with and supported from the cage outlet to relieve the treatment unit from supporting the weight of the final portion of the exhaust system.
  • Figure 1 shows an agricultural tractor fitted with an exhaust system in accordance with the present invention adjacent the right-hand front A-pillar of the cab and with part of the engine cover removed for clarity;
  • Figure 2 shows a plan view of the tractor of Figure 1 ;
  • Figure 3 shows a perspective view of the exhaust system of the present invention.
  • Figure 4 shows an exploded version of Figure 3
  • Figure 5 shows a plan view of the exhaust system of Figure 3
  • Figure 6 shows a side view of the exhaust system of Figure 3;
  • Figure 7 shows a section of on the line A-A of Figure 5;
  • FIG. 8 shows details of the attachment of an exhaust gas treatment unit to its surrounding cage
  • FIG 9 shows details of the independent attachment of the gas treatment unit and final portion of the exhaust system to the surrounding cage.
  • an agricultural tractor 50 has an engine 1 with an exhaust mounted turbo charger 2 with an engine cover 51, part of which is cut-away in figures 1 and 2.
  • Turbo charger 2 feeds an exhaust system which includes an engine braking throttle valve 3, an exhaust temperature sensor 4 and a first NOx sensor 5. These components are all directly mounted on the engine downstream of the turbo charger 2.
  • a vibration isolating element 6 is connected by V-clamps 14 to the exhaust portion 7 which includes a urea injection unit 8.
  • Exhaust section 7 is connected with an inlet 9a (see fig 4) of an exhaust treatment unit 9 which includes an oxidation catalysers 9b, NOx catalysers 9c and an absorber 9d (see fig 4 and 7) for NOx, HC, and NH 3 .
  • the exhaust gas treatment unit 9 is supported within a cage C in the form of a lower support part 12 and an upper support part 15.
  • a cage C in the form of a lower support part 12 and an upper support part 15.
  • Each of these two parts of the cage C is provided with circumferentially spaced axially extending fingers 12a and 15a whose adjacent ends are secured together by bolts 15b.
  • Perforated heat shields 17 bridge the gaps between fingers 12a and 15a to prevent accidental contact with the hot exhaust gas treatment unit 9.
  • the upper support portion 15 has an outlet 15e (fig 7 and 9) to which an outlet 9e of the gas treatment unit is connected.
  • the outlet 15e also supports a final portion 18 of the vehicle exhaust system (which includes a silencer etc) via a further V-clamp 14.
  • a heat shield 19 surrounds the final portion of the exhaust system to prevent accidental contact with the exhaust.
  • the gas treatment unit 9 is secured to the lower support part 12 by a bolt 21 which extends through a rubber collar 20 within which a metal sleeve 20a is provided to ensure that, when the bolt 21 is tightened to engage a nut 22 which is welded internally to the gas treatment unit 9, the correct pre-loading of the rubber sleeve 20 occurs via washer 23.
  • a bolt 21 which extends through a rubber collar 20 within which a metal sleeve 20a is provided to ensure that, when the bolt 21 is tightened to engage a nut 22 which is welded internally to the gas treatment unit 9, the correct pre-loading of the rubber sleeve 20 occurs via washer 23.
  • several bolts 21 with cooperating nuts 22 and sleeves 20,20a may be used at different locations to resiliently mount the unit 9 on the lower support part 12.
  • Figures 7 and 9 shows the detail of the connection of the outlet 9d of the gas control unit 9 with the outlet 15e of the upper support part 15.
  • the output 9d of the gas treatment unit 9 is provided with a second NOx sensor 10 which can be accessed for maintenance via a cover 16 on the cage C.
  • the electronic control unit for the second NOx sensor is protected by a cover 11 which is carried by the exhaust section 7, and connected thereto by leads 10a.
  • the lower support part 12 of the cage C is connected with the tractor chassis by bolts 13 so that the entire weight of the exhaust system is carried by the cage C and not transferred to the inner gas treatment unit 9 which can therefore be of a lighter construction.
  • the exhaust system of the present invention allows the main exhaust treatment unit to be mounted outside the normal engine compartment cover and in a position which does not have a great effect on the visibility from the cab.
  • the construction of the exhaust gas treatment unit can be made considerably lighter and less expensive and can be designed to be useable on more than one tractor model.
  • this enables the installation of a standard buy-in unit kit which can be used on other types of vehicles.
  • gas treatment unit uses catalytic coatings on relatively fragile support materials the fact that the treatment unit is not stressed by the weight of the final portion of the exhaust system additionally the shock absorbing and vibration-absorbing capabilities of the installation are advantageous.
  • exhaust treatment unit is not mounted under the normal engine compartment cover, this leaves space available under the normal engine compartment cover for the mounting of other exhaust gas treatment units which may be required such as particulate filters and also allows existing vehicle engine installations to be easily upgraded to include improved exhaust gas treatment by mounting the gas treatment unit external to the engine compartment.
  • the exhaust system of the present invention is applicable to a wide range of exhaust gas treatment configurations in which the exhaust gas treatment unit may include one or more of the following units namely, an oxidation catalyser, an NOx catalyser and an NOx, HC or NH 3 absorber or diesel particulate filters. Also, although in the embodiment described above, urea injection is used this is not essential and the present invention is applicable to systems which do not inject urea into the exhaust system.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Exhaust Silencers (AREA)

Abstract

La présente invention se rapporte à un système d'échappement destiné à un véhicule possédant une cabine (53) et un moteur à combustion interne (1) situé dans un compartiment moteur (51). Le système comprend une unité de traitement de gaz d'échappement (9) située à l'extérieur du compartiment moteur et possédant une entrée (9a) qui reçoit les gaz d'échappement provenant du moteur et une sortie (9e) qui fait passer les gaz traités dans une dernière partie (E) du système d'échappement. L'unité de traitement (9) est conçue pour s'étendre de manière globalement verticale avec la sortie (9e) au-dessus de l'entrée (9a) et de manière adjacente à un montant d'angle (52) de la cabine du véhicule afin de réduire l'impact sur la visibilité depuis la cabine. Une cage (C) entoure l'unité de traitement de gaz d'échappement (9) et possède un moyen de support (12) à fixer à un châssis du véhicule et une sortie (15e) à laquelle est reliée la sortie (9e) de l'unité de traitement. La dernière partie (E) du système d'échappement est reliée à la sortie de cage (15e) et soutenue depuis celle-ci afin de soulager l'unité de traitement (9) du soutien du poids de la dernière partie du système d'échappement.
EP09775150A 2008-12-19 2009-12-07 Systèmes d'échappement pour véhicules Withdrawn EP2379857A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0823124A GB2466483A (en) 2008-12-19 2008-12-19 A vertical exhaust system for a vehicle
PCT/EP2009/066554 WO2010069806A1 (fr) 2008-12-19 2009-12-07 Systèmes d'échappement pour véhicules

Publications (1)

Publication Number Publication Date
EP2379857A1 true EP2379857A1 (fr) 2011-10-26

Family

ID=40343843

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09775150A Withdrawn EP2379857A1 (fr) 2008-12-19 2009-12-07 Systèmes d'échappement pour véhicules

Country Status (7)

Country Link
US (1) US20110283687A1 (fr)
EP (1) EP2379857A1 (fr)
CN (1) CN102257254B (fr)
BR (1) BRPI0922562A2 (fr)
GB (1) GB2466483A (fr)
RU (1) RU2508458C2 (fr)
WO (1) WO2010069806A1 (fr)

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WO2015177704A1 (fr) 2014-05-19 2015-11-26 Same Deutz-Fahr Group S.P.A. Système de traitement des gaz d'échappement d'un véhicule équipé d'un moteur à combustion interne

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WO2015177704A1 (fr) 2014-05-19 2015-11-26 Same Deutz-Fahr Group S.P.A. Système de traitement des gaz d'échappement d'un véhicule équipé d'un moteur à combustion interne

Also Published As

Publication number Publication date
WO2010069806A1 (fr) 2010-06-24
GB2466483A (en) 2010-06-30
CN102257254A (zh) 2011-11-23
CN102257254B (zh) 2015-05-13
US20110283687A1 (en) 2011-11-24
BRPI0922562A2 (pt) 2015-12-15
GB0823124D0 (en) 2009-01-28
RU2011129821A (ru) 2013-01-27
RU2508458C2 (ru) 2014-02-27

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