EP2004963A1 - An exhaust gas plant for internal combustion engines - Google Patents
An exhaust gas plant for internal combustion enginesInfo
- Publication number
- EP2004963A1 EP2004963A1 EP07726345A EP07726345A EP2004963A1 EP 2004963 A1 EP2004963 A1 EP 2004963A1 EP 07726345 A EP07726345 A EP 07726345A EP 07726345 A EP07726345 A EP 07726345A EP 2004963 A1 EP2004963 A1 EP 2004963A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plant
- exhaust gas
- deviating
- exhaust
- vehicle
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
-
- 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/031—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters having means for by-passing filters, e.g. when clogged or during cold engine start
-
- 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
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
- F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
-
- 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
- F01N2410/00—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/70—Input parameters for engine control said parameters being related to the vehicle exterior
- F02D2200/701—Information about vehicle position, e.g. from navigation system or GPS signal
Definitions
- the invention relates to an exhaust gas plant for internal combustion engines, typically for diesel engines.
- the invention relates to an exhaust gas plant comprising at least an anti-particulate filter; the plant traps the particulate matter that passes through conventional gas treatment devices located upstream of the filter.
- particulate matter i.e. a mixture of powders and non-combusted sooty particles, metal oxides and the like, which remain suspended in the air.
- passive-type anti-particulate filters have been developed and realised, and are available both as standard equipment and as accessories. These are installed in the terminal tract of the exhaust line, and are designed to trap the particulate and prevent its subsequent release into the atmosphere.
- exhaust plants that are equipped with a passive anti-particulate filter usually comprise an auxiliary branch which bypasses the filter proper, as well as means for deviating the exhaust gas flow internally of the auxiliary branch when the temperature and/or the pressure of the gases upstream of the means for deviating exceed these predetermined critical limit levels.
- passive anti-particulate filters cannot be regenerated on board the vehicle, but have to be dismounted each time they become clogged up, and replaced.
- a particularly relevant drawback of the known filters is that they clog up rather rapidly, requiring frequent maintenance operations and resulting in long inactive periods for the vehicles they are fitted on.
- the applicant has however observed that the use of an anti-particulate filter is necessary especially when the vehicle is used in an urban context, where the use of low gears, frequent accelerations and numerous stops lead to a generally worse combustion of the diesel fuel and therefore to a greater particulate percentage in the exhaust gas; furthermore, the pollution caused in urban contexts is more damaging because of the large number of vehicles in circulation and the high population density.
- the aim of the present invention is to provide an exhaust gas plant for internal combustion engines which enables selective use of the anti- particulate filter only when needed, effectively increasing the working life thereof and thus obviating the above-described drawback in the prior art.
- a further aim of the invention is to attain the above-mentioned aim with a simple, rational and economical solution.
- an exhaust gas plant for internal combustion engines which comprises an exhaust evacuation line for the exhaust gases, an anti-particulate filter intercepting the exhaust evacuation line, an auxiliary branch connected to the evacuation line for bypassing the anti-particulate filter, and means for selectively deviating the exhaust gas into the auxiliary branch.
- the exhaust gas plant comprises a control system which controls the means for deviating according to the geographical location of the vehicle to which the exhaust gas plant is associated.
- control system commands the means for deviating in such a way that the flow of the exhaust gas is made to pass exclusively into the anti-particulate filter during urban driving, where the particulate is at its most harmful; while the exhaust gas is made to pass exclusively into the auxiliary by-pass branch during non-urban driving.
- the control system commands the means for deviating in such a way that the flow of the exhaust gas is made to pass exclusively into the anti-particulate filter during urban driving, where the particulate is at its most harmful; while the exhaust gas is made to pass exclusively into the auxiliary by-pass branch during non-urban driving.
- control system comprises a remote device, external and independent of the vehicle, which is destined to interact with an on-board device located on the vehicle itself for detecting the geographical location thereof, for example a technology of the "telepass", citypass” or satellite navigation type, or the like.
- control system can simply comprise a control device of the means for deviating, which is manually activatable by the driver.
- FIG. 1 is a schematic view of the exhaust gas plant of the invention
- FIG. 2 and 3 illustrate, in longitudinal section, the diverter manifold of figure 1 , shown respectively during operation in an urban zone and during operation in a non-urban zone.
- the exhaust gas plant 6 of the present invention comprises a usual exhaust evacuation line 7 for guiding the exhaust gas issuing from an internal combustion engine 8, typically a diesel engine, towards the outside environment.
- the exhaust evacuation line 7 is generally intercepted by a plurality of devices for treatment of the exhaust gas, in particular by a catalytic converter - A -
- the silencer 10 is located downstream of the catalytic converter 9, with respect to the outflow direction of the exhaust gas.
- the exhaust evacuation line 7 further comprises a three-way exhaust diverter manifold 60, provided with an inlet duct 61 for the exhaust gas, from which a first outlet terminal 62 and a second outlet terminal 63 branch off.
- the diverter manifold 60 is located in the terminal tract of the exhaust evacuation line 7, downstream of the catalytic converter 9 and the silencer 10, with respect to the outflow direction of the exhaust gas, or is integrated with the silencer 10 itself.
- the first terminal 62 of the manifold 60 is intercepted by a passive filter 1 , which filters the exhaust gas and retains the particulate allowed to pass through the upstream devices, and in particular particulate rated less than PM10, i.e. classifiable as fine particles.
- the second terminal 63 is substantially an auxiliary branch which by-passes the passive filter 1 , preventing the exhaust gases from flowing there-through.
- the second terminal 63 terminates directly in the atmosphere, i.e. reaches the outside without being intercepted by any other exhaust gas treatment device.
- the exhaust manifold 60 comprises diverter means for selectively deviating the exhaust gas towards the first terminal 62 or the second terminal 63.
- the diverter means comprise a diverter valve afforded directly internally of the body of the exhaust manifold 60.
- the diverter valve is essentially constituted by a butterfly obturator 64 pivoted to the inside of the manifold 60, to which it is mechanically connected by actuator means of known type, for example an electric motor which selectively moves the butterfly obturator 64 between a first and a second work position.
- the butterfly obturator 64 In the first work position the butterfly obturator 64 completely closes the second terminal 63 and opens the first terminal 62 (see figure 2), so that the exhaust gas crosses only the antiparticulate filter 1 ; while in the second work position the obturator 64 opens the second terminal 63 and completely closes the first terminal 62 (see figure 3), sending the entire exhaust gas flow into the atmosphere.
- the displacements of the butterfly obturator 64 are controlled by a special control system (not illustrated) which detects the geographical location of the vehicle on which the exhaust gas plant 6 is installed, and consequently commands the means for actuating the diverter valve.
- control system is configured in such a way as to arrange the butterfly obturator 64 in the first work position when the vehicle is in an urban zone, and to arrange the obturator 64 in the second work position when the vehicle is outside an urban zone.
- control system of the diverter valve comprises a remote device, external and independent of the vehicle, which interacts by means of radio signals or other electronic signals with an on-board device located on the vehicle itself, to reveal the geographical location of the vehicle.
- the remote device emits the above-mentioned signals, which are captured and received by the on-board device.
- the remote device can be associated to a fixed station, located for example along a main arterial road for entrance to or exit from a densely- populated centre; the device could be recognisable by a "telepass” or "citypass” type system on-board a vehicle passing by the fixed station.
- the remote device and the on-board device could be part of a satellite localisation device of the vehicle, which satellite localisation device might include a map of the area the vehicle is travelling in; the device could be of the type known as "sat-nav" appliances.
- the control system of the diverter valve comprises a manual command organ, for example a button located internally of the cabin of the vehicle, which is manually activatable by the driver.
- the vehicle driver can manually commute the diverter valve into the position in which the exhaust gases are forced to pass through the filter 1 ; while on exiting the urban centre, the driver can commute the valve into the position in which the exhaust gases pass through the auxiliary branch 63, directly towards the atmosphere.
- the diverter valve control system is completed by special sensors (not illustrated) which are designed to detect the pressure and/or the temperature of the exhaust gases upstream of the manifold 60.
- the control system causes the butterfly obturator 64 to move into the second work position, i.e. into the position in which it prevents passage of the exhaust gases into the filter 1 , whenever the temperature and/or the pressure of the exhaust gas is above a predetermined threshold limit; this is independent of the geographical position of the vehicle.
- the threshold limit values include a safety limit, in the sense that they prevent the antiparticulate filter 1 from being subject to internal pressures and/or temperatures which are too high and which might lead to damage to the filter 1.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas After Treatment (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000047A ITRE20060047A1 (en) | 2006-04-07 | 2006-04-07 | EXHAUST SYSTEM FOR EXHAUST GAS OF INTERNAL COMBUSTION ENGINES |
PCT/EP2007/051323 WO2007115850A1 (en) | 2006-04-07 | 2007-02-12 | An exhaust gas plant for internal combustion engines |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2004963A1 true EP2004963A1 (en) | 2008-12-24 |
EP2004963B1 EP2004963B1 (en) | 2009-10-28 |
Family
ID=37433653
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07726345A Active EP2004963B1 (en) | 2006-04-07 | 2007-02-12 | An exhaust gas plant for internal combustion engines |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2004963B1 (en) |
AT (1) | ATE447096T1 (en) |
DE (1) | DE602007003001D1 (en) |
IT (1) | ITRE20060047A1 (en) |
WO (1) | WO2007115850A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT201900000355U1 (en) * | 2019-01-31 | 2020-07-31 | Motori Minarelli S P A | EXHAUST SYSTEM OF COMBUSTION PRODUCTS OF A TWO-STROKE ENDOTHERMIC ENGINE |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0441914A (en) * | 1990-06-01 | 1992-02-12 | Nissan Motor Co Ltd | Exhaust gas processor for internal combustion engine |
EP1222377B1 (en) * | 1999-10-06 | 2003-08-13 | Robert Bosch Gmbh | Control device for cleaning a storage catalytic converter in a motor vehicle |
GB2390438A (en) * | 2002-07-01 | 2004-01-07 | London Taxis Internat Ltd | Vehicle control and warning system. |
DE20302143U1 (en) * | 2003-02-10 | 2003-04-17 | Bollmann, Stefan, Dipl.-Ing., 66497 Contwig | Driver warning and information system based on the position of the vehicle determined by, e.g. GPS or manual input |
DE10341090A1 (en) * | 2003-09-05 | 2005-04-07 | Siemens Ag | Control device and control method for a drive of a motor vehicle |
FR2863657B1 (en) * | 2003-12-16 | 2007-08-03 | Renault Sas | METHOD AND DEVICE FOR TREATING EXHAUST GASES |
-
2006
- 2006-04-07 IT IT000047A patent/ITRE20060047A1/en unknown
-
2007
- 2007-02-12 EP EP07726345A patent/EP2004963B1/en active Active
- 2007-02-12 WO PCT/EP2007/051323 patent/WO2007115850A1/en active Application Filing
- 2007-02-12 DE DE602007003001T patent/DE602007003001D1/en not_active Expired - Fee Related
- 2007-02-12 AT AT07726345T patent/ATE447096T1/en not_active IP Right Cessation
Non-Patent Citations (1)
Title |
---|
See references of WO2007115850A1 * |
Also Published As
Publication number | Publication date |
---|---|
ITRE20060047A1 (en) | 2007-10-08 |
EP2004963B1 (en) | 2009-10-28 |
DE602007003001D1 (en) | 2009-12-10 |
ATE447096T1 (en) | 2009-11-15 |
WO2007115850A1 (en) | 2007-10-18 |
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