GB2432901A - A cooler having a valve to control the amount of cooling - Google Patents
A cooler having a valve to control the amount of cooling Download PDFInfo
- Publication number
- GB2432901A GB2432901A GB0621302A GB0621302A GB2432901A GB 2432901 A GB2432901 A GB 2432901A GB 0621302 A GB0621302 A GB 0621302A GB 0621302 A GB0621302 A GB 0621302A GB 2432901 A GB2432901 A GB 2432901A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cooler
- fluid
- exhaust gas
- emission control
- control device
- 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
- 238000001816 cooling Methods 0.000 title claims abstract description 19
- 239000012530 fluid Substances 0.000 claims abstract description 67
- 239000002826 coolant Substances 0.000 claims abstract description 54
- 238000002485 combustion reaction Methods 0.000 claims description 15
- 230000001419 dependent effect Effects 0.000 claims description 3
- 230000003197 catalytic effect Effects 0.000 abstract description 3
- 238000004378 air conditioning Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 173
- 230000008901 benefit Effects 0.000 description 10
- 239000003054 catalyst Substances 0.000 description 9
- 238000011144 upstream manufacturing Methods 0.000 description 6
- 239000011449 brick Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 3
- 125000006850 spacer group Chemical group 0.000 description 3
- 238000005219 brazing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 241000370685 Arge Species 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9431—Processes characterised by a specific device
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
- F01M5/002—Cooling
-
- 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
-
- 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
- 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
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
-
- 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
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
-
- 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
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
- F01N3/0842—Nitrogen oxides
-
- 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
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/08—Arrangements of lubricant coolers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0012—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the apparatus having an annular form
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
- F28D9/0043—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
- F28F27/02—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
-
- 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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/02—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a heat exchanger
-
- 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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/36—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an exhaust flap
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2060/00—Cooling circuits using auxiliaries
- F01P2060/16—Outlet manifold
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Exhaust Silencers (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
A cooler 11 for cooling a fluid comprises an inlet 28, an outlet 31 and at least one passage 30 for the fluid, at least one coolant passage 32 through which a coolant passes for heat transfer with the at least one passage 30 for the fluid, and a valve 25 moveable between a direct flow position (fig 4) whereby a minimum resistance is exhibited to the flow of the fluid from the inlet 28 to the outlet 31 and substantially no fluid flows through the at least one passage 30 for the fluid, and a transfer position (fig 5) whereby all of the fluid in the cooler 11 is diverted through the at least one passage 30 for the fluid before flowing out of the outlet 31. The fluid may be exhaust from an engine (5, fig 1) and the cooler 11 may be used in an air conditioning system or as an oil cooler. Valve 25 may be a butterfly valve. The at least one passage 30 for the fluid and coolant passage 32 may be C-shaped (figs 7 and 8) and comprise of plates 20 stacked together. Cooler 11 may be combined into a single unit with an emission control device (12) after or before the cooler 11 and combined with a further emission control device (figs 9 and 10, 12B). Emission control device 12 may be a catalytic converter (12A) or NOx trap (12B).
Description
<p>A Fluid Cooler This invention relates to heat exchangers and in
particular to an exhaust gas cooler for an internal combustion engine.</p>
<p>It is known to provide an internal combustion engine that can be operated in more than one combustion mode such as, a lean combustion mode, a stoichiometrjc combustion mode and a rich combustion mode.</p>
<p>To reduce emission from such an engine it is known to use one or more emission control devices to reduce the emissions from the engine. A three way catalyst is an emission control device used when the combustion is stoichiometric or rich but such a catalyst is not effective for converting NOx when the engine is operating in the lean combustion mode and so an emission control device in the form of a lean NOx trap is normally also used for these periods of lean combustion.</p>
<p>Such emission control devices require a minimum exhaust gas temperature in order to begin functioning efficiently and this temperature is often referred to as the light-off temperature of the device. It is desirable for an emission control device to reach this light-off temperature as soon as possible after start-up of the engine so as to keep to a minimum the time period when the emission control device is not performing efficiently thereby reducing start-up emissions. It is therefore desirable to position an emission control device of this type as close as possible to an exhaust outlet from an engine so as to maximise the temperature of the exhaust gas entering the emission control device and reduce the time delay before the light-off temperature is reached. It is therefore becoming common practice to attach the emission control device directly to an exhaust manifold of the engine and such emission control devices are often referred to as direct or close coupled devices. However, the performance of such an emission control device will deteriorate rapidly if the temperature of the exhaust gasses passing through it is too high for too long a period of time.</p>
<p>It is known from, for example, GB-A-2337710 to provide an exhaust system for a lean burn engine having a lean NOx trap (LNT) and a heat exchanger located upstream of the lean NOx trap to control the temperature of the exhaust gases entering the lean NOx trap. Such an arrangement is advantageous because in order for the lean NOx trap to operate at peak efficiency the temperature of the gases passing through the trap must be maintained between 300 and 425 c.</p>
<p>It is an object of this invention to provide a heat exchanger that is of a compact design and is economical to manufacture.</p>
<p>According to a first aspect of the invention there is provided a fluid cooler for connection to a fluid flow requiring selective cooling, the cooler comprising a cooler inlet through which in use fluid enters the cooler and a cooler outlet from which in use fluid flows out of the cooler, at least one coolant flow passage through which in use coolant flows, at least one fluid transfer passage arranged for heat transfer with the at least one coolant flow passage and a valve moveable between a direct flow position in which fluid flows directly from the cooler inlet to the cooler outlet with minimum resistance to flow and a transfer position in which all of the fluid entering through the cooler inlet is diverted though the at least one fluid transfer passage before flowing out via the cooler outlet wherein each fluid transfer passage has a fluid inlet through which diverted fluid enters the fluid transfer passage and a fluid outlet from which cooled fluid leaves the fluid transfer passage and the fluid inlet and outlet for each fluid transfer passage are positioned the caine distance from the cooler inlet so that, when the valve is positioned in the direct flow position, substantially no fluid flows through the or each fluid transfer passage.</p>
<p>The valve may be a butterfly valve.</p>
<p>The cooler may be an exhaust gas cooler for connection () to an exhaust gas flow from an internal combustion engine and the fluid is exhaust gas from the engine.</p>
<p>Because the inlet to and outlet from each fluid transfer passage is positioned the same distance from the is cooler inlet there is no significant pressure differential between them and so there is no pressure gradient causing exhaust gas to enter the exhaust gas transfer passage when the valve is in the direct flow position. This has the advantage that no cooling of the exhaust gas will occur to the exhaust gas flowing through the exhaust gas cooler when the valve is in the direct flow position and so the maximum possible exhaust gas temperature will be maintained at the outlet from the exhaust gas cooler.</p>
<p>The cooler may have a plurality of fluid transfer passages.</p>
<p>The fluid cooler may have a plurality of coolant flow passages.</p>
<p>The coolant flow passages may be arranged in parallel between a common inlet and a common outlet.</p>
<p>The coolant flow passages may be connected to a common coolant inlet by an inlet plenum and may be connected to a common coolant return by an outlet plenum.</p>
<p>The valve may he a butterfly valve having a shaft supported by a bearing and the shaft may extend from the bearing to a head of the butterfly valve through a gap formed between the inlet and outlet plenums so as to minimise the temperature of the bearing.</p>
<p>This has the advantage that the bearing used for the butterfly valve can be manufactured from a material that is less resistant to high temperatures and so a less expensive material can be used.</p>
<p>The cooler may further comprise a cylindrical body supporting a C-shaped heat exchange unit defining the plurality of coolant flow passages and the plurality of fluid transfer passages.</p>
<p>The cylindrical body may be attached to a cylindrical tube defining a substantially cylindrical central flow passage extending through the exhaust gas cooler and the butterfly valve is rotatably mounted in the central flow passage.</p>
<p>The C-shaped heat exchange unit may be comprised of a number of C-shaped plates stacked together so as to define the plurality of coolant flow passages and the plurality of fluid transfer passages.</p>
<p>This has the advantage that a very compact heat exchange unit can be produced.</p>
<p>All of the C-shaped plates may be identical to one another.</p>
<p>This has the advantage that the heat exchange unit can be manufactured in a very cost effective manner.</p>
<p>Each C-shaped plate may have a front surface in which is formed at least one depression and a rear surface and the plates are secured together in pairs such that their respective front surfaces face one another so as to define therebetween at least one coolant flow passage and the pairs of plates are stacked one against another so that the rear surface of one plate of one pair faces the rear surface of one plate of an adjacent pair so as to define therebetween at least one exhaust gas transfer passage.</p>
<p>A spacer may be provided between each pair of plates so as to space the facing rear surfaces apart to form the at least one exhaust gas transfer passage. The spacer may be formed by a lip extending outwardly from the rear surface of each plate around an outer circumferential edge of each plate.</p>
<p>The cooler outlet may be formed as a divergent nozzle.</p>
<p>According to a second aspect of the invention there is provided a combined emission control device and exhaust gas cooler assembly for connection to an exhaust gas flow from an internal combustion engine wherein the exhaust gas cooler is a fluid cooler in accordance with said first aspect of the invention and the assembly comprises of the exhaust gas cooler and at least one emission control device connected together so as to form a single unit.</p>
<p>The emission control device may be positioned downstream from the exhaust gas cooler.</p>
<p>The exhaust gas cooler may be arranged to receive in use a flow of gas from the engine and the an emission control device is positioned downstream from the exhaust gas cooler, the emission control device having an inlet through which exhaust gas enters the emission control device from the exhaust gas cooler and an outlet from which treated exhaust gas flows to atmosphere wherein the emission control device is connected directly to the exhaust gas cooler so that they form a single unit.</p>
<p>s This has the advantage that there is less heat loss between the exhaust gas cooler and the emission control device than is the case if separate units are used and the addition of an exhaust gas cooler enables the emission control device to be positioned very close to an exhaust outlet from the engine thereby reducing the time to light-off the emission control device.</p>
<p>Advantageously, the exhaust gas cooler may have a divergent nozzle outlet which co-operates directly with the is inlet to the emission control device.</p>
<p>This has the advantage that the exhaust gas entering the emission control device is uniformly dispersed across the inlet to the emission control device rather than being concentrated in a small area.</p>
<p>The at least one emission control device may be one of a catalytic converter and a NOx trap.</p>
<p>There may be two emission control devices and an exhaust gas cooler formed as a single unit.</p>
<p>One emission control device may be positioned upstream from the exhaust gas cooler and one emission control device may be positioned downstream from the exhaust gas cooler.</p>
<p>Preferably a catalyst may be positioned upstream from the exhaust gas cooler and a lean NOx trap may be positioned downstream from the exhaust gas cooler.</p>
<p>The invention will now be described by way of example with reference to the accompanying drawing of which:-Fig.l shows an internal combustion engine having a combined emission control device and exhaust gas cooler according to a preferred embodiment of the invention; Fig.2 is a pictorial end view of the combined emission control device and cooler shown in Fig.l; Fig.3 is a pictorial side view of the combined emission control device and cooler shown in Fig.l Fig.4 is a cross-section through an exhaust gas cooler forming part of the combined emission control device and exhaust gas cooler shown in Figs. 2 and 3 and shows a butterfly valve in a direct flow position; Fig.5 is a cross-section similar to Fig.4 but showing the butterfly valve in a transfer position; Fig.6 is a view similar to Fig.4 but showing only an upper half of the exhaust gas cooler; Fig.7 is a pictorial side view of the exhaust gas cooler shown in Figs.4 and 5 in a partially assembled state showing a coolant outlet plenum; Fig.8 is a pictorial side view of the exhaust gas cooler shown in Figs.4 and 5 in a partially assembled state showing the coolant outlet plenum and a coolant inlet plenum; Fig.9 is a schematic diagram of a second embodiment of a combined emission control device and exhaust gas cooler according to the invention; and Fig.10 is a schematic diagram of a third embodiment of a combined emission control device and exhaust gas cooler according to the invention.</p>
<p>With particular reference to Fig.l there is shown an internal combustion engine 5 having an exhaust manifold 6 to which is connected an exhaust pipe 7u leading to an inlet to a combined emission control device and cooler assembly 10.</p>
<p>The combined emission control device and cooler assembly 10 comprises of an emission control device 12 such a catalytic converter or NOx trap and a fluid cooler in the form of an exhaust gas cooler 11 positioned upstream from the emission control device 12.</p>
<p>A second exhaust pipe 7d transfers exhaust gas from an outlet 13 of the emission control device 12 to atmosphere.</p>
<p>The exhaust gas cooler 11 includes a butterfly valve 25 (not shown on Fig.1) which is moveable between a direct flow position in which exhaust gas passes directly through the exhaust gas cooler 11 with no appreciable cooling and a transfer position in which all of the exhaust gas is cooled as will be described in more detail hereinafter. The butterfly valve 25 is rotated by an actuator mechanism including an electronically controlled actuator 9.</p>
<p>The electronically controlled actuator 9 is operably connected to an electronic control unit 8 which controls the positioning of the butterfly valve 25. A temperature sensor 4 is positioned at or near to an inlet to the emission control device 12 so as to measure the temperature of the exhaust gas entering the emission control device 12 and provides a signal indicative of the sensed temperature to the electronic control unit 8.</p>
<p>The electronic control unit 8 controls the positioning of the butterfly valve 25 based upon the signal received from the temperature sensor 4.</p>
<p>In an exemplary form of operation the electronic control unit 8 is operable to control the electronically controlled actuator 9 to move the butterfly valve 25 to the direct flow position when the signal from the temperature sensor 4 indicates that the temperature of the exhaust gas entering the emission control device 12 is below a first predetermined temperature. The first predetermined temperature may be the light-off temperature of the emission control device 12 or a temperature slightly above this temperature. It is a priority to reach light-off as quickly as possible in order to minimise emissions from the engine 5.</p>
<p>If the signal from the temperature sensor 4 indicates that the temperature of the exhaust gas entering the emission control device 12 is above a second higher predetermined temperature the electronic control unit 8 is operable to control the electronically controlled actuator 9 to move the butterfly valve 25 towards the transfer position so as to reduce thetemperature of the exhaust gas entering the emission control device 12 so as to bring the temperature back to the second predetermined temperature.</p>
<p>The second predetermined temperature is preferably a temperature where the emission control device 12 operates at or near to maximum efficiency without rapid temperature induced performance loss occurring. If the temperature falls below the second predetermined temperature then the electronic control unit 8 is operable to control the electronically controlled actuator 9 to move the butterfly valve 25 back towards the direct flow position so as to increase the temperature of the exhaust gas entering the emission control device 12. That is to say, the position of -10 -the butterfly valve 25 is controlled in a closed loop manner so as to maintain the temperature of the exhaust gas entering the emission control device 12 aL or close to the second predetermined temperature whenever possible.</p>
<p>It will be appreciated that other forms of control are possible and that the invention is not limited to such closed loop temperature control.</p>
<p>It will also he appreciated that the electronic control unit 8 may be programmed to permit the temperature of the exhaust gas entering the emission control device 12 to exceed the second predetermined temperature in order to periodically regenerate the emission control device 12.</p>
<p>It will be further appreciated that the inlet to the exhaust gas cooler 11 could be connected directly to the exhaust manifold 6 of the engine 5 without the need for the exhaust pipe 7u. In this case the combined emission control 2o device and exhaust gas cooler assembly 10 would be direct or close coupled to the engine 5.</p>
<p>With particular reference to Figs.2 to 6 the combined emission control device and exhaust gas cooler assembly 10 is shown in greater detail.</p>
<p>The combined emission control device and exhaust gas cooler assembly 10 has a cast cylindrical outer body 26 which is connected to a longitudinally extending central cylindrical tube 15 by a cooler outlet 27. The central cylindrical tube 15 and the cooler outlet 27 are both formed as an integral part with the body 26 and an end cap 16 is fastened to one end of the cylindrical body 26 and to the cylindrical tube 15 50 as to form an enclosure for a C-shaped heat exchange unit. The cylindrical tube 15 defines a substantially cylindrical central flow passage extending -11 -through the exhaust gas cooler and the butterfly valve 25 is rotatably mounted in the central flow passage.</p>
<p>In this case the cooler outlet is in the form of a divergent nozzle 27 but it will be appreciated that the cylindrical tube could simply extend outwardly from the combined emission control device and exhaust gas cooler assembly 10 to form a cooler outlet.</p>
<p>An end portion of the cylindrical tube 15 forms a cooler inlet that is to say exhaust gas enters the combined emission control device and exhaust gas cooler assembly 10 through a free end of the cylindrical tube 15.</p>
<p>Exhaust gas can selectively enter and leave the C-shaped heat exchange unit through two apertures 21 or ports formed in the cylindrical tube 15 positioned between the end cap 16 and the cooler outlet 27.</p>
<p>An advantage of using a divergent nozzle 27 is that the exhaust gas leaving the exhaust gas cooler 11 is able to spread Out into a more uniform flow so as to be more uniformly distributed when it impinges against the brick or bricks forming part of the emission control device 12. This increases the efficiency of the emission control device 12 compared to the situation where a small diameter concentrated flow is supplied to a central portion of the first or inlet brick. This is because the full surface area of the brick is immediately utilised whereas with a concentrated flow arrangement there is often a dead zone around the perimeter of the first brick through which virtually no exhaust gas flows.</p>
<p>The C-shaped heat exchange unit is formed by a number of C-shaped plates 20 which are stacked together to define a plurality of exhaust gas transfer passages 30 and a plurality of coolant flow passages 32.</p>
<p>-12 -The C-shaped heat exchange unit defines a substantially cylindrical central flow passage extending through the exhaust gas cooler 11 and the butterfly valve 25 is rotatably mounted in the central flow passage. The central flow passage extends along a longitudinal axis X-X as shown on Fig.4.</p>
<p>The butterfly valve 25 has a shaft or spindle 23 supported by a bearing (not shown) located in a boss 18 formed on the body 26. The spindle 23 extends from the bearing to a head 24 of the butterfly valve 25 through a gap formed between a coolant inlet plenum 41 and a coolant outlet plenum 40 so as to minimise the temperature of the bearing. A lever 14 is attached to one end of the spindle 23 for use in connecting the spindle 23 to the electronically controlled actuator 9.</p>
<p>The coolant inlet plenum 41 has an inlet formed by a tube 17 which is connected in use to a source of coolant such as a cooling circuit of the engine 5 and the coolant outlet plenum 40 has an outlet formed by a tube 19 used to connect the coolant outlet plenum 40 to a return conduit to return coolant to the source from which the coolant is derived. In use coolant enters the coolant inlet plenum 41 through the tube 17 and flows from the coolant inlet plenum 41 through all of the coolant flow passages 32 in parallel to the coolant outlet plenum 40 and then back to the source of coolant via the tube 19.</p>
<p>With particular reference to Figs.6 to 8 the construction of the C-shaped heat exchange unit will now be described in more detail.</p>
<p>The C-shaped heat exchange unit comprises of a stack of identical plates 20. Each of the plates has a front surface in which is formed a depression 33 between in and outer -13 -circumferentially extending flanges 34, 36 and a rear surface from which extends a lip 35 around the outer periphery of each plate 20.</p>
<p>The plates 20 are secured together by brazing in pairs such that their respective front surfaces face one another so as to define therebetween a coolant flow passage 32.</p>
<p>That is to say the inner and outer circumferentially extending flanges 34, 36 abut one another and are brazed io together and the two depressions 33 form in combination a single coolant flow passage 32. The pairs of plates 20 are stacked one against another so that the rear surface of one plate 20 of one pair faces the rear surface of one plate 20 of an adjacent pair so as to define therebetweeni an exhaust gas transfer passage 30. The two lips 35 abut against one another when the two pairs of plates abut one another and are brazed together to prevent exhaust gas leakage. The height of the lips 35 on the two abutting plates 20 is such that they act as a spacer separating the two rear surfaces to form an exhaust gas transfer passage 30 between the two adjacent rear surfaces. Such a stacked plate construction provides a heat exchange unit that is very compact and cost effective to manufacture and, in particular, the axial length of the heat exchange unit is relatively small.</p>
<p>Each of the exhaust gas transfer passages 30 has a gas inlet 28 and a gas outlet 31. The distance of the gas inlet 28 from the cooler inlet for each of the exhaust gas transfer passages 30 is the same as the distance of the gas outlet 31 from the cooler inlet so that there is substantially no pressure difference between the gas inlet 28 and the gas outlet 31 when the butterfly valve 25 is in the direct flow position. This means that no exhaust gas will flow through the exhaust gas transfer passages 30 when the butterfly valve 25 is in the direct flow position and so the maximum possible exhaust gas temperature will be produced at the cooler outlet 27. This is advantageous -14 -during engine start-up from cold as it will minimise the time taken for the emission control device 12 to reach its light-off temperature.</p>
<p>As can best be seen with reference to Fig.8 (in which only one plate 20 is shown) each of the plates 20 is fastened to the inlet and outlet plenums 41, 40 by brazing so as to form a fluid tight seal between the plenums 40, 41 and the coolant flow passages 32.</p>
<p>Operation of the exhaust gas cooler 11 is best understood with reference to Figs 4 and 5.</p>
<p>Fig.4 shows the butterfly valve 25 in the direct flow position. In this position the butterfly valve 25 is aligned with the exhaust gas flow entering the exhaust gas cooler 11 and produces virtually no resistance to flow.</p>
<p>Therefore when the butterfly valve 25 the exhaust gas is in this position the exhaust gas enters the exhaust gas cooler 11 through the cylindrical tube 15 and flows through the exhaust gas cooler 11 with no appreciable cooling to the cooler outlet 27 from where it enters the emission control device 12.</p>
<p>If it is desired to reduce the temperature of the exhaust gas exiting the exhaust gas cooler 11 the butterfly valve 25 is rotated (in this case in a clockwise direction) so that it is no longer aligned with the flow of exhaust gas entering the exhaust gas cooler 11. The effect of this rotation is to produce a pressure differential between each gas inlet 28 and the corresponding gas outlet 31 thereby causing exhaust gas to begin flowing through the exhaust gas transfer passages 30 from the gas inlets 28 to the gas outlets 31. As exhaust gas passes through each of the exhaust gas transfer passages 30 it passes over the plates defining the exhaust gas transfer passage 30 which are cooled by the coolant flowing through the coolant flow -15 -passages 32. The exhaust gas is therefore cooled as it moves from the gas inlet 28 to the gas outlet 31. It will be appreciated that as shown and described the heat exchange unit is a contraflow unit in that the direction of flow of coolant is the opposite to the direction of flow of exhaust gas through the exhaust gas transfer passages 30 however this need not be the case and the coolant could he arranged to flow in the same direction as the exhaust gas.</p>
<p>The percentage of exhaust gas that passes through the exhaust gas transfer passages 30 depends upon the angle of the butterfly valve 25 to the direction of the exhaust gas entering the exhaust gas cooler 11 or more accurately to the magnitude of the pressure differential between each gas inlet 28 and gas outlet 31 produced by the inclined position of the butterfly valve 25.</p>
<p>One of the advantages of the heat exchange unit shown is that the exhaust gas transfer passages are arranged in parallel so that, when exhaust gas is diverted therethrough, a relatively large area gas flow passage is provided which minimises the back pressure upstream from the exhaust gas cooler 11.</p>
<p>When maximum cooling of the exhaust gas is required the butterfly valve 25 is moved to the transfer position shown in Fig.5 in which the butterfly valve 25 abuts against an inner wall of the cylindrical tube 15 and a cylindrical portion of the cooler outlet 27. In this position :30 substantially all of the exhaust gas entering the exhaust gas cooler 11 through the cylindrical tube 15 as indicated by the arrow A' enters the gas inlets 28, as indicated by the arrow B', passes through the exhaust gas transfer passages 30, leaves the exhaust gas transfer passages 30 via the gas outlets 31, as indicated by the arrow D', and exits the exhaust gas cooler 11 via the cooler outlet 27, as indicated by the arrow E' -16 -It will therefore be appreciated that by varying the angle of rotation of the butterfly valve 25 a seamless and infinitely variable change in the proportion of exhaust gas being cooled can be produced between the limits of zero cooling and maximum cooling. The controllability of such a design is therefore very good which can be important particularly if the temperature of the emission control device has to be kept within relatively small limits as is the case with some formulations of NOx trap.</p>
<p>With reference to Fig.9 there is shown a second embodiment of a combined emission control device and exhaust gas cooler according to the invention. The construction of the combined emission control device and exhaust gas cooler is substantially as described above and so will not be described again in detail.</p>
<p>The primary difference with this embodiment compared to that previously described is that instead of the exhaust gas flowing through the exhaust gas cooler first and then into the emission control device the opposite arrangement is used. That is to exhaust gas enter an emission control device such as a catalyst 12A flows through the catalyst 12A and then flows into an exhaust gas cooler 11. As before the catalyst 12A and the exhaust gas cooler 11 are formed as a single unit so that the outlet from the catalyst 12A forms the inlet to the exhaust gas cooler 11 or the inlet to the exhaust gas cooler 11 forms the outlet from the catalyst 12A. The exhaust gas from the exhaust gas cooler 11 can then be fed to a further emission control device such as a lean NOx trap l2B which is very temperature sensitive.</p>
<p>With reference to Fig.lO there is shown a third embodiment of a combined emission control device and exhaust gas cooler according to the invention.</p>
<p>-17 -The construction of the exhaust gas cooler is as previously described and so will not be described again in detail.</p>
<p>In this embodiment the exhaust gas cooler 11 is combined in a single unit with two emission control devices 12A, 12B. That is to say exhaust gas from an engine enters the combined emission control device and exhaust gas cooler and passes first through an emission control device able to withstand relatively high temperatures such as a three way catalyst 12A and then passes into the exhaust gas cooler 11 where the exhaust gas is selectively cooled and then passes through a second emission control device that is temperature sensitive such as a lean NOx trap 12B before passing out to atmosphere.</p>
<p>It will be appreciated that a further embodiment is also possible in which the two emission control devices 12A, 12B are both positioneddownstream from the exhaust gas cooler 11 in a single unit this embodiment is not shown.</p>
<p>Although the invention has been described so far in relation a preferred embodiment in which the exhaust gas cooler 11 and the emission control device 12 are attached directly to one another to form a single combined emission control device and exhaust gas cooler assembly it will be appreciated that the emission control device 12 and the exhaust gas cooler 11 could be separate self contained units connected together by a conduit or pipe. In this case the exhaust gas cooler 11 will be positioned upstream from the emission control device 12 and the outlet from the exhaust gas cooler 11 will be connected to the inlet to the emission control device 12. In this case the outlet from the exhaust gas cooler 11 may be formed by a cylindrical outlet pipe and need not be of a divergent nozzle form.</p>
<p>-18 -Therefore in summary, the design of the valve for an exhaust gas cooler is fundamental since it accounts for a ]arge proportion of the overall cost of the device. The design described herein enables the valve spindle bearings to be kept cool using the coolant jacket at approximately 100 C arid this results in a substantial cost saving over a design in which the bearings must be specified to be leak free at 900 C.</p>
<p>In addition, by using a butterfly valve, the actuation forces are dramatically lower than for a flap valve having a spindle at one edge because the exhaust gas forces that act against a top half of the butterfly valve are balanced to some degree by the forces that act against a lower half of the butterfly valve. This allows a lower power actuation system to be used which is both more compact and less expensive to produce.</p>
<p>Further the positioning of the gas inlets and gas outlets to the cooler matrix mean that as soon as the butterfly valve starts to move away from the horizontal or direct flow position, some flow is deflected through the cooler due to higher pressure in front of the valve face, and exits into a lower pressure region immediately behind the valve face. This results in a very controllable partial cooling mode in which the proportion of gas flowing through the cooler varies relatively linearly with the angle of the control valve. This is an important requirement for such a device since the amount of gas cooling required will be dictated by the limitations of the vehicle cooling system to which the exhaust gas cooler is connected. If fine control of temperature is not possible, either the vehicle cooling system will overheat or insufficient gas cooling will be provided.</p>
<p>Although the invention has been described with reference to a preferred embodiment in which a butterfly -19 -type valve is used to control the flow through the heat exchanger it will be appreciated that other types of valve could be used. For example, a flap valve could be used which has the advantage that the flap valve could be s arranged to automatically open if the exhaust gas back pressure becomes excessive irrespective of the valve position set by the actuation means. This situation could arise if a high power output is demanded from the engine when it is still warming up. During warm-up exhaust gas would normally be diverted by the valve through the cooler but if a high power output is then required this would produce a very high back pressure reducing the performance of the engine.</p>
<p>Although the invention has thus far been described with respect to a preferred use for selectively cooling exhaust gas from an engine it will be appreciated that it could be applied to any other situation where heat exchange is required with minimum parasitic loss and a fluid flow requires selective cooling such as for example an air conditioning unit requiring cooled gas or an oil cooler in which hot oil needs to be cooled by coolant from an engine cooling circuit.</p>
<p>In a modification to the embodiment described above the compact exhaust gas heat exchanger could be used purely for improved engine coolant warm-up and hence improved cabin heater performance. In this case a valve actuation mechanism which operates based upon the temperature of the coolant in the heat exchanger would be used. This has the advantage that the whole unit becomes self contained and does not require an interface with an engine management system.</p>
<p>The actuation of the cooler valve could be through the use of a wax operated device which causes the movement of a control linkage when it is heated and cooled. Such wax -20 -operated devices are well known from conventional coolant thermostats and also from EP-1672189 where the wax filled actuator is used to control a valve based upon the temperature of oil.</p>
<p>With such an arrangement, when the coolant is cold, the cooler valve would be held in the closed heat exchange' position with a spring. The heat energy from the exhaust gas is then, as discussed above, transferred to the coolant to assist warm-up. When the temperature of the coolant reaches a specific or predetermined temperature, the wax in the actuator will expand and melt forcing a piston forming part of the wax actuator to move thereby operating a linkage connecting the wax actuator to the cooler valve. This will result in the cooler valve being opened allowing exhaust gas to bypass the heat exchanger.</p>
<p>It will be appreciated that there are other temperature dependent forms of actuation that could be used to perform this function and that a wax actuator is not the only mechanism that could be used. For example, JP-2005315292 discloses a shape memory metal actuator that could be easily adapted to perform the opening and closing of the cooler valve.</p>
<p>It will be appreciated by those skilled in the art that although the invention has been described by way of example with reference to one or more embodiments it is not limited to the disclosed embodiments and that modifications to the disclosed embodiments or alternative embodiments could be constructed without departing from the scope of the invention.</p>
Claims (1)
- <p>-21 -Claims 1. A fluid cooler for connection to a fluid flow requiringselective cooling, the cooler comprising a cooler inlet through which in use fluid enters the cooler and a cooler outlet from which in use fluid flows out of Lhe cooler, at least one coolant flow passage through which in use coolant flows, at least one fluid transfer passage arranged for heat transfer with the at least one coolant flow passage and a valve moveable between a direct flow position in which fluid flows directly from the cooler inlet to the cooler outlet with minimum resistance to flow and a transfer position in which all of the fluid entering through the cooler inlet is diverted though the at least one fluid transfer passage before flowing out via the cooler outlet wherein each fluid transfer passage has a fluid inlet through which diverted fluid enters the fluid transfer passage and a fluid outlet from which cooled fluid leaves the fluid transfer passage and the fluid inlet and outlet for each fluid transfer passage are positioned the same distance from the cooler inlet so that, when the valve is positioned in the direct flow position, substantially no fluid flows through the or each fluid transfer passage.</p><p>2. A cooler as claimed in claim 1 wherein the valve is a butterfly valve.</p><p>3. A cooler as claimed in claim 1 or in claim 2 wherein the cooler is an exhaust gas cooler for connection to an exhaust gas flow from an internal combustion engine and the fluid is exhaust gas from the engine.</p><p>4. A cooler as claimed in any of claims 1 to 3 wherein the cooler has a plurality of fluid transfer passages.</p><p>-22 - 5. A cooler as claimed in any of claims 1 to 4 wherein the fluid cooler has a plurality of coolant flow passages.</p><p>6. A cooler as claimed in claim 5 wherein the coolant flow passages are arranged in parallel between a common inlet and a common outlet.</p><p>7. A cooler as claimed in claim 5 when claim 5 is dependent upon claim 4 or in claim 6 when claim 5 is dependent upon claim 4 wherein the cooler further comprises a cylindrical body supporting a C-shaped heat exchange unit defining the plurality of coolant flow passages and the plurality of fluid transfer passages.</p><p>8. A cooler as claimed in claim 7 wherein the cylindrical body is attached to a cylindrical tube defining a substantially cylindrical central flow passage extending through the exhaust gas cooler and the butterfly valve is rotatably mounted in the central flow passage.</p><p>9. A cooler as claimed in claim 7 or in claim 8 wherein the C-shaped heat exchange unit is comprised of a number of C-shaped plates stacked together so as to define the plurality of coolant flow passages and the plurality of fluid transfer passages.</p><p>10. A combined emission control device and exhaust gas cooler assembly for connection to an exhaust gas flow from an internal combustion engine wherein the exhaust gas cooler is a fluid cooler as claimed in any of claims 1 to 9 and the assembly comprises of the exhaust gas cooler and at least one emission control device connected together so as to form a single unit.</p><p>11. A fluid cooler substantially as described herein with reference to the accompanying drawing.</p><p>-23 - 12. A combined emission control device and fluid cooler assembly substantially as described herein with reference to the accompanying drawing.</p>
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0524690A GB2432900A (en) | 2005-12-02 | 2005-12-02 | A cooler having a valve to control the amount of cooling |
Publications (3)
Publication Number | Publication Date |
---|---|
GB0621302D0 GB0621302D0 (en) | 2006-12-06 |
GB2432901A true GB2432901A (en) | 2007-06-06 |
GB2432901B GB2432901B (en) | 2010-08-18 |
Family
ID=35686016
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB0524690A Pending GB2432900A (en) | 2005-12-02 | 2005-12-02 | A cooler having a valve to control the amount of cooling |
GB0621302A Expired - Fee Related GB2432901B (en) | 2005-12-02 | 2006-10-26 | A fluid cooler |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB0524690A Pending GB2432900A (en) | 2005-12-02 | 2005-12-02 | A cooler having a valve to control the amount of cooling |
Country Status (1)
Country | Link |
---|---|
GB (2) | GB2432900A (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20030005686A1 (en) * | 2001-02-21 | 2003-01-09 | Johannes Hartick | Exhaust system |
US20030111211A1 (en) * | 2000-01-21 | 2003-06-19 | Stonehouse Matthew Thomas Graham | Exhaust gas heat exchanger |
EP1326011A2 (en) * | 1998-05-15 | 2003-07-09 | ArvinMeritor, Inc. | Exhaust system |
US20050199381A1 (en) * | 2002-05-15 | 2005-09-15 | Behr Gmbh & Co. Kg | Switchable waste gas exchanger |
-
2005
- 2005-12-02 GB GB0524690A patent/GB2432900A/en active Pending
-
2006
- 2006-10-26 GB GB0621302A patent/GB2432901B/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1326011A2 (en) * | 1998-05-15 | 2003-07-09 | ArvinMeritor, Inc. | Exhaust system |
US20030111211A1 (en) * | 2000-01-21 | 2003-06-19 | Stonehouse Matthew Thomas Graham | Exhaust gas heat exchanger |
US20030005686A1 (en) * | 2001-02-21 | 2003-01-09 | Johannes Hartick | Exhaust system |
US20050199381A1 (en) * | 2002-05-15 | 2005-09-15 | Behr Gmbh & Co. Kg | Switchable waste gas exchanger |
Also Published As
Publication number | Publication date |
---|---|
GB2432900A (en) | 2007-06-06 |
GB0524690D0 (en) | 2006-01-11 |
GB0621302D0 (en) | 2006-12-06 |
GB2432901B (en) | 2010-08-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8793986B2 (en) | Combined cabin heater and EGR heat exchanger | |
US6807955B2 (en) | Exhaust gas cooler with bypass tube and exhaust gas recirculation valve | |
US20170241320A1 (en) | Exhaust heat recovery system with bypass | |
US8695332B2 (en) | Internal bypass exhaust gas cooler | |
EP2084480B1 (en) | Heat exchanger with bypass | |
US6422007B1 (en) | Exhaust system | |
US8733327B2 (en) | Charge air duct for an internal combustion engine | |
EP2025913A1 (en) | Three-pass heat exchanger for an EGR system | |
US20120199319A1 (en) | Arrangement for cooling the exhaust gas of a motor vehicle | |
US6647711B1 (en) | Device for supplying exhaust gases from an internal combustion engine to a catalytic converter | |
NL7907840A (en) | HEAT EXCHANGER CORE. | |
JP2005273564A (en) | Exhaust gas recirculation device | |
US8118082B2 (en) | Heat exchanger in particular for exhaust coolers on internal combustion engines | |
JP4269946B2 (en) | Exhaust gas recirculation device | |
US20030005686A1 (en) | Exhaust system | |
GB2466722A (en) | Exhaust manifold with a cooling path and a non-cooling path | |
US6073616A (en) | Arrangement at the intake manifold of an internal combustion engine | |
GB2432901A (en) | A cooler having a valve to control the amount of cooling | |
JP5673229B2 (en) | Exhaust heat exchanger | |
GB2367355A (en) | A heat exchanger for exhaust gas of an ic engine | |
JPH0263158B2 (en) | ||
CA2217770A1 (en) | System for controlling the temperature of a temperature control fluid in an internal combustion engine | |
JPH01313666A (en) | Intake device for internal combustion engine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20201026 |