US20110283687A1 - Exhaust systems for vehicles - Google Patents

Exhaust systems for vehicles Download PDF

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Publication number
US20110283687A1
US20110283687A1 US13/139,325 US200913139325A US2011283687A1 US 20110283687 A1 US20110283687 A1 US 20110283687A1 US 200913139325 A US200913139325 A US 200913139325A US 2011283687 A1 US2011283687 A1 US 2011283687A1
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United States
Prior art keywords
treatment unit
cage
exhaust
outlet
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.)
Abandoned
Application number
US13/139,325
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
Assigned to AGCO GMBH reassignment AGCO GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HEISLER, ROBERT, DOBLER, JOHANN, HEINLE, HANS, HONZEK, ROBERT, THORSTEN, CAPELLE, BUCHER, ROMAN
Publication of US20110283687A1 publication Critical patent/US20110283687A1/en
Abandoned legal-status Critical Current

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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
    • 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
    • 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
  • FIG. 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;
  • FIG. 2 shows a plan view of the tractor of FIG. 1 ;
  • FIG. 3 shows a perspective view of the exhaust system of the present invention.
  • FIG. 4 shows an exploded version of FIG. 3 ;
  • FIG. 5 shows a plan view of the exhaust system of FIG. 3 ;
  • FIG. 6 shows a side view of the exhaust system of FIG. 3 ;
  • FIG. 7 shows a section of on the line A-A of FIG. 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 FIGS. 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 9 a (see FIG. 4 ) of an exhaust treatment unit 9 which includes an oxidation catalysers 9 b , NOx catalysers 9 c and an absorber 9 d (see FIGS. 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 12 a and 15 a whose adjacent ends are secured together by bolts 15 b .
  • Perforated heat shields 17 bridge the gaps between fingers 12 a and 15 a to prevent accidental contact with the hot exhaust gas treatment unit 9 .
  • the upper support portion 15 has an outlet 15 e ( FIGS. 7 and 9 ) to which an outlet 9 e of the gas treatment unit is connected.
  • the outlet 15 e 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 20 a 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 20 a 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 , 20 a may be used at different locations to resiliently mount the unit 9 on the lower support part 12 .
  • FIGS. 7 and 9 shows the detail of the connection of the outlet 9 d of the gas control unit 9 with the outlet 15 e of the upper support part 15 .
  • Two rectangular cross section rings 24 of knitted metal fabric (or alternatively heat resistant rubber material such as high temperature polysiloxane) are provided. These rings provide a gas tight seal and also some level of vibration isolation of the inner gas treatment unit 9 from the outer support cage C.
  • the output 9 d 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 10 a.
  • 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 gas treatment unit and the final portion of the exhaust system extending generally vertically and adjacent the right-hand A-pillar 52 of the cab 53 of the tractor the effective of this unit on the visibility from the cab is minimized, as can be seen from FIG. 2 , in which the obscured portion of the driver's view marked Z largely corresponds with the field of view which is normally blocked by the front right-hand wheel of the tractor.
  • 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.
  • 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.

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  • 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

An exhaust system for a vehicle having a cab (53) and an internal combustion engine (1) located in an engine compartment (51). The system includes an exhaust gas treatment unit (9) located outside the engine compartment and having an inlet (9 a) which receives exhaust gases from the engine and an outlet (9 e) which passes treated gases into a final portion (E) of the exhaust system. The treatment unit (9) is arranged to extend generally vertically with the outlet (9 e) generally vertically above the inlet (9 a) and adjacent a corner post (52) of the cab of the vehicle to reduce impact on the visibility from the cab. A cage (C) surrounds the exhaust gas treatment unit (9) and has a support means (12) for attachment to a chassis of the vehicle and an outlet (15 e) which the outlet (9 e) of the treatment unit is connected. The final portion (E) of the exhaust system is connected with and supported from the cage outlet (15 e) to relieve the treatment unit (9) from supporting the weight of the final portion of the exhaust system.

Description

  • 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.
  • It is an object of the present invention to provide such an exhaust system which allows the treatment unit to be conveniently fitted external to the engine compartment to the vehicle in an efficient and low cost manner which has minimum impact on the design of the remainder of the vehicle.
  • Thus according to the present invention there is provided an exhaust system for a vehicle having a cab and an internal combustion engine located in an engine compartment, the system 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.
  • Preferably a cage 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. Also, as the exhaust gas treatment unit is not required to support the weight of the final portion of the exhaust system, 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. In addition as 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.
  • Additionally by locating the exhaust gas treatment unit outside the engine compartment it is less exposed to high ambient heat levels and heat emanating from the unit does not impact on the under bonnet installations. Also there is more room in the engine compartment for other elements of the exhaust system such as particulate filters should these be required. Also existing vehicle engine installations can easily be upgraded to include improved exhaust gas treatment.
  • Also by locating the treatment unit immediately adjacent to the final portion of the exhaust system, which can include the silencer, back pressure can be reduced to improve exhaust gas flow.
  • As the exhaust gas treatment unit is located towards the end of the exhaust system 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. As 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.
  • In a preferred construction 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.
  • The present invention will now be described, by way of example only, with reference to the accompanying drawings in which:
  • FIG. 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;
  • FIG. 2 shows a plan view of the tractor of FIG. 1;
  • FIG. 3 shows a perspective view of the exhaust system of the present invention.
  • FIG. 4 shows an exploded version of FIG. 3;
  • FIG. 5 shows a plan view of the exhaust system of FIG. 3;
  • FIG. 6 shows a side view of the exhaust system of FIG. 3;
  • FIG. 7 shows a section of on the line A-A of FIG. 5;
  • FIG. 8 shows details of the attachment of an exhaust gas treatment unit to its surrounding cage, and
  • FIG. 9 shows details of the independent attachment of the gas treatment unit and final portion of the exhaust system to the surrounding cage.
    •
  • Referring to the drawings, 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 FIGS. 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 9 a (see FIG. 4) of an exhaust treatment unit 9 which includes an oxidation catalysers 9 b, NOx catalysers 9 c and an absorber 9 d (see FIGS. 4 and 7) for NOx, HC, and NH3.
  • In accordance with the present invention 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. Each of these two parts of the cage C is provided with circumferentially spaced axially extending fingers 12 a and 15 a whose adjacent ends are secured together by bolts 15 b. Perforated heat shields 17 bridge the gaps between fingers 12 a and 15 a to prevent accidental contact with the hot exhaust gas treatment unit 9.
  • The upper support portion 15 has an outlet 15 e (FIGS. 7 and 9) to which an outlet 9 e of the gas treatment unit is connected. The outlet 15 e 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.
  • As can be seen from FIGS. 7 and 8, 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 20 a 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. As will be appreciated several bolts 21 with cooperating nuts 22 and sleeves 20,20 a may be used at different locations to resiliently mount the unit 9 on the lower support part 12.
  • FIGS. 7 and 9 shows the detail of the connection of the outlet 9 d of the gas control unit 9 with the outlet 15 e of the upper support part 15. Two rectangular cross section rings 24 of knitted metal fabric (or alternatively heat resistant rubber material such as high temperature polysiloxane) are provided. These rings provide a gas tight seal and also some level of vibration isolation of the inner gas treatment unit 9 from the outer support cage C.
  • Additionally the output 9 d 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 10 a.
  • As will be appreciated, 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.
  • Also, by positioning the gas treatment unit and the final portion of the exhaust system extending generally vertically and adjacent the right-hand A-pillar 52 of the cab 53 of the tractor the effective of this unit on the visibility from the cab is minimized, as can be seen from FIG. 2, in which the obscured portion of the driver's view marked Z largely corresponds with the field of view which is normally blocked by the front right-hand wheel of the tractor.
  • As referred to previously, 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.
  • Also by making the exhaust treatment unit 9 a non-stressed unit (as it does not have to support the weight of the exhaust system), 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. Advantageously this enables the installation of a standard buy-in unit kit which can be used on other types of vehicles.
  • As indicated previously, since such 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.
  • Also, since the 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 NH3 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.

Claims (12)

1-12. (canceled)
13. An exhaust for an internal combustion engine for a vehicle, the system including an exhaust gas treatment unit having an inlet and an outlet and a final portion of the exhaust system which receives the exhaust gases from the treatment unit, the system having 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, the final portion of the exhaust system being 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.
14. A system according to claim 13 in which 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.
15. A system according to claim 14 in which the upper and lower portions of the cage are 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.
16. A system according to claim 14 in which the upper and lower cage portions are of a cast metal construction.
17. A system according to claim 15 in which the gaps between the fingers of the upper and lower portions of the cage are covered by heat shields to prevent accidental contact with the exhaust gas treatment unit.
18. A system according to claim 13 in which he exhaust gas treatment unit includes one or more of the following components namely an oxidation catalyser, a NOx catalyser and/or NOx, HC, NH3 absorber arranged in series.
19. A system according to claim 18 in which the exhaust gas treatment unit includes a NOx sensor.
20. A system according to claim 19 in which the upper portion of the cage includes an access cover for the NOx sensor on the treatment unit.
21. A system according to claim 13 in which the gas treatment unit is secured to the cage via a vibration mount.
22. An exhaust system according to claim 13 in which the top of the cage for the treatment unit is located below the top of a cover over the associated engine to reduce impact on visibility from the cab.
23. An exhaust system for a vehicle having a cab and an internal combustion engine located in an engine compartment, the system 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 extending 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.
US13/139,325 2008-12-19 2009-12-07 Exhaust systems for vehicles Abandoned US20110283687A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0823124.3 2008-12-19
GB0823124A GB2466483A (en) 2008-12-19 2008-12-19 A vertical exhaust system for a vehicle
PCT/EP2009/066554 WO2010069806A1 (en) 2008-12-19 2009-12-07 Exhaust systems for vehicles

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US20110283687A1 true US20110283687A1 (en) 2011-11-24

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

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GB2466483A (en) 2010-06-30
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BRPI0922562A2 (en) 2015-12-15
EP2379857A1 (en) 2011-10-26

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