GB2301177A - Exhaust gas heat exchanger in an internal combustion engine - Google Patents

Exhaust gas heat exchanger in an internal combustion engine Download PDF

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Publication number
GB2301177A
GB2301177A GB9510080A GB9510080A GB2301177A GB 2301177 A GB2301177 A GB 2301177A GB 9510080 A GB9510080 A GB 9510080A GB 9510080 A GB9510080 A GB 9510080A GB 2301177 A GB2301177 A GB 2301177A
Authority
GB
United Kingdom
Prior art keywords
duct
heat exchanger
control
valve
engine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9510080A
Other versions
GB9510080D0 (en
Inventor
Timothy Mark Lancefield
David Crabb
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.)
Mechadyne International Ltd
Original Assignee
Mechadyne Ltd
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 Mechadyne Ltd filed Critical Mechadyne Ltd
Priority to GB9510080A priority Critical patent/GB2301177A/en
Publication of GB9510080D0 publication Critical patent/GB9510080D0/en
Priority to PCT/GB1996/001180 priority patent/WO1996036505A1/en
Priority to AU57704/96A priority patent/AU5770496A/en
Publication of GB2301177A publication Critical patent/GB2301177A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy
    • F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy the devices using heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
    • B60H1/025—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant from both the cooling liquid and the exhaust gases of the propulsion plant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
    • B60H1/14—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit
    • B60H1/18—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit the air being heated from the plant exhaust gases
    • 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
    • F01P3/00—Liquid cooling
    • F01P3/20—Cooling circuits not specific to a single part of engine or machine
    • 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
    • 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

Abstract

A method of controlling the flow of exhaust gasses in an internal combustion engine in order to allow the engine to be warmed up more quickly in which a heat exchanger 14 is provided in a control duct 16 of the engine exhaust system and a bypass duct 18 is provided through which exhaust gasses can flow without passing through the heat exchanger. The method comprises progressively closing, via control valve 20, at least partially the bypass duct 18 to divert at least a proportion of the exhaust gasses through the heat exchanger 14 in the control duct 16 thereby causing the engine coolant to extract heat from the heat exchanger.

Description

CONTROL VALVE FOR HEAT EXCHANGERS IN INTERNAL COMBUSTION ENGINES This invention relates to a control valve for controlling the flow of fluid through a pair of fluid transfer ducts. The invention is particularly, although not exclusively, useful for controlling the flow of exhaust gasses from an internal combustion engine through a heat exchanger disposed in one of a pair of exhaust ducts by progressively opening or closing the ducts until the flow through the two ducts are as required and/or the pressure upstream of the valve is at a requisite level.
In some motor vehicles and particularly diesel powered motor vehicles which have sizeable interior cabins, the cabin temperature can take some considerable time to be raised to a level which in some climatic conditions is agreeable to the occupants, particularly over short journeys. It is known to use electric and fuel burning preheaters to pre-heat the engine coolant and vehicle cabin and to use heat batteries which are recharged by operation of the vehicle during running. Heat batteries preheat a vehicle cabin by releasing the stored energy but in order for such waste heat devices to be effective, the journey time needs to be long enough to recharge the heat battery to a satisfactory level for re-use.
The present invention seeks to provide the control of the distribution of a fluid through a pair of passageways and, more specifically to improve the heating system of a motor vehicle so as to reduce the time in which the engine and cabin temperature are brought up to an operational level and to maintain engine and cabin temperature at a requisite level during periods of light engine load.
One aspect of the invention provides a method of controlling the flow of a fluid through a pair of fluid ducts which method comprises progressively closing at least partially one of the ducts while the other of the ducts remains at least partially open in order to divert a proportion or all of the fluid through the other of the ducts or until the pressure of the fluid upstream of the valve is at a required level.
Another aspect of the invention provides a method of controlling the flow of exhaust gasses in an internal combustion engine in order to allow the engine to be warmed up more quickly in which a heat exchanger is provided in a control duct of the engine exhaust system and a bypass duct is provided through which exhaust gasses can flow without passing through the heat exchanger, which method comprises progressively closing at least partially said bypass duct to divert at least a proportion of the exhaust gasses through said heat exchanger in the control duct thereby causing the engine coolant to extract heat from the heat exchanger.
Yet another aspect of the invention provides method of operating a control valve for controlling fluid flow in a pair of fluid passageways by progressively closing both of the passageways in such a way that one of the passageways is closed before the other.
Yet another aspect of the invention provides an exhaust system for an internal combustion engine which system comprises a heat exchanger provided in a duct of the system, a bypass duct through which, in use, exhaust gasses can flow without passing through the heat exchanger and a control valve to control the flow distribution of exhaust gasses through both ducts and/or to alter the back pressure in the system upstream of said control valve.
According to a feature of this aspect of the invention the heater exchanger duct and the bypass duct may be controlled by said control valve in parallel.
According to another feature of this aspect of the invention the ducts may be controlled by said valve simultaneously.
Embodiments of the invention will now be described, by way of example, with reference to the accompanying drawings, in which: Figure 1 is a schematic view of an exhaust system of an internal combustion engine including a heat exchanger and a control valve according to the invention; Figure 2 is a schematic perspective view of one type of rotary control valve suitable for use in the system; Figure 3 is a schematic perspective view of a second type of rotary control valve suitable for use in the system; Figure 4 is a schematic perspective view of a butterfly type control valve suitable for use with the system; Figure 5 is a further schematic perspective view of another butterfly type control valve; and Figure 6 is a schematic view of an exhaust system and engine coolant circuit of an internal combustion engine including a heat exchanger, a heat battery and a control valve according to the invention.
Referring to the drawings, Figure 1 shows an exhaust system 10 for an internal combustion engine 12 in which a heat exchanger 14 is included such that heat may be extracted from the exhaust gasses to raise the temperature of the engine coolant. The heat exchanger 14 is disposed in a control duct 16 which is in substantially parallel axial relationship with respect to a length of a main bypass duct 18. A control valve 20 is connected across the control duct 16 and the bypass duct 18 to control the flow distribution of exhaust gasses therethrough whereafter the exhaust gasses leave the system through an exit duct 22.
In a first embodiment of a control valve according to the invention, control valve 20 shown in Figure 2 comprises a cylindrical valve chamber 24 which is connected transversely across the control duct 16 and the bypass duct 18 and, at a diametrically opposed location relative to ducts 16 and 18 is connected transversely across the exit duct 22. The control and bypass ducts communicate with the valve chamber 24 by means of inlet ports 26 and 28 respectively. An outlet port 30 communicates the valve chamber 24 with the exit duct 22.
In order to control flow of fluid through the valve a rotatable valve body 32 is a sliding fit within the valve body 24. The valve body is hollow and includes spaced openings 34, 36 and 38 which are arranged so as to communicate with the bypass duct 18 the control duct 16 and the outlet duct 22 respectively. Opening 38 has a greater circumferential extent than the neighbouring opening 36. The openings are arranged such that when the opening 34 is fully aligned with the inlet port 18 then so too is the opening 38 aligned with the outlet duct 22 so that the flow of exhaust gasses pass through the valve to the outlet duct 22 with minimum flow restriction.
The opening 34 does not necessarily communicate the inlet port 28 of the bypass duct with the outlet port 30 due to the relative sizing of the apertures 34 and 38. In some operating conditions, for example when it is required to extract heat from the engine quickly at start-up, the valve body is rotated to a position in which the bypass duct 18 is at least partially closed while the opening 36 fully communicates the control duct 16 with the outlet duct 22. This distributes the exhaust gas flow in favour of the control duct. The valve may then be controlled so that the restriction created in the bypass duct is relieved by reverse rotation of the valve body 32 relative to the valve chamber 24 so that the bypass duct again fully communicates with the exhaust duct to reduce the engine load. Conversely, continued rotation of the valve body after the bypass duct 18 has been fully closed will progressively close the control duct 16 and, in some situations, where it is required to increase the engine load and hence the heat output through the heat exchanger to some considerable degree the valve body can be caused to occupy a position in which the bypass duct is fully closed and control duct is largely closed. When the valve is set in this position, engine load is increased to increase the heat output of the engine so that heat transferred to the engine coolant by the engine and heat exchanger is increased. Thereafter, pressure in the system can be relieved by reverse rotation of the valve body progressively to open the control duct and thereafter the bypass duct.It will be appreciated that the progressive closure of the control duct following sequentially from the closure of the bypass duct is effected as a continuation of the operation of the valve.
Referring now to Figure 3 of the drawings a further rotary valve arrangement 2Oa is illustrated and like parts to those of the construction shown in Figure 2 are designated like reference numerals with the addition of the suffix "a". In this embodiment the cylindrical valve chamber is not connected transversely across parallel control and bypass ducts but instead the control duct 16a is ported to the valve cylinder body axially. The relative positions of the bypass duct 18a and the outlet duct 22a are, however, generally as in the previous embodiment. In order to control flow of exhaust gasses through the valve a rotary valve body 32a is a sliding fit within the cylindrical valve chamber 24a.The valve body 32a includes a window aperture 34a for controlling the flow of exhaust gasses through the valve from the bypass duct 18a, a further window opening 38a for controlling egress of exhaust gasses from the valve through the outlet duct 22a and an axial end port 36a which comprises a circumferentially extending opening formed in an end plate 40 which control the opening or closure of the port 26a.
Thus, as in the previous embodiment the porting and corresponding apertures of the rotary valve body are arranged such that the bypass duct l8a can progressively be closed while the control duct remains open until such time as, if desired, the bypass duct 18a can be completely closed while the control duct remains open. Thereafter by continuing rotation of the rotary element in the same sense the control duct 16a can also progressively be closed until the bypass duct is closed and the control duct largely closed.
Figure 4 of the drawings shows a butterfly valve arrangement lOb for the bypass duct 18b and the control duct 16b. Like parts to those of previous embodiments are designated like reference numerals with the addition of suffix "b". In valve 10b a butterfly vane 42 is rotatably mounted in the bypass duct 1 8b to control the flow of exhaust gasses therethrough and a similar butterfly vane 44 is rotatably mounted in the control duct 16b also to control the flow of exhaust gasses therethrough. The valve vanes are operated by means of control levers 46 and 48, respectively, which themselves are linked to suitable actuating means. The vanes may be operated independently or may be connected to operate in tandem. In either case vane 42 is set at a different axial inclination to that of vane 44.Thus, as in the previous embodiments, vane 42 can be rotated progressively to close the bypass duct 18b while the control duct remains open and, through continued operation of the valve, vane 44 can be rotated progressively partially to close the control duct. Further operation of the valve is such that opening of the control duct would be initiated first followed by progressive opening of the bypass duct.
Figure 5 of the drawings shows a butterfly valve arrangement similar in some respects to that of Figure 4 except that in this embodiment there is a valve vane 42c in the bypass duct 18c and a valve vane 50 in the outlet duct 22c but none in the control duct 16c. In this arrangement, in order to alter the flow distribution of the exhaust gasses, instead of closing the control duct, the outlet duct valve vane is moved to a partially closed position after closing the bypass valve. Thus, back pressure in the exhaust system can be increased but full back pressure is felt only by valve 50 in the outlet port so that leakage is reduced over other embodiments. Other valve types may be adopted in a similar configuration. Moreover, in the embodiment shown in Figure 5, the valving could be arranged so that the exhaust flow was in the opposite direction.Hence, valve 50 would be upstream of valve 42c in the bypass duct.
Figure 6 shows an engine exhaust system, according to the invention incorporated as part of a fluid circuit in a motor vehicle fitted with a heat battery. The heat battery 52 is heated by fluid from a heat exchanger 14 disposed in a control duct 16 upstream of a control valve 20. The outlet from the heat battery is linked to the engine coolant inlet from the engine coolant pump 56. Coolant is pumped around the circuit by a coolant pump 56 so that after leaving the engine 12 coolant passes back through the radiator 54 and/or heat exchanger via a thermostat 58 and a heater matrix 60 and is returned for reheating to the heat exchanger 14.
In an alternative engine exhaust system in which any one of the embodiments of valving described above is incorporated, it is envisaged that the valving could be positioned upstream, in terms of gas flow, of the heat exchanger and bypass duct. In such an arrangement the valving would still control the exhaust gas back pressure experienced by the engine and the flow distribution through the control and bypass ducts but would not control the pressure in either the control or bypass ducts. The main advantage of such a configuration is that it may allow installation of a system according to the invention to be fitted where the system first described could not be fitted.
The valves according to the invention can be controlled in a variety of ways. For example simple thermostatic and pressure operated actuators may be utilised acting directly under the influence of operating parameters such as heat exchanger coolant outlet temperature and back pressure up stream of the valve. A wax type thermostat and a diaphragm type actuator responding to back pressure would be typical actuators for this simple system. An alternative to a simple control system is one brought under engine management control. Such a system would use sensors attached to an engine management system to monitor the temperature of the coolant, the back pressure and potentially various other relevant parameters. Depending upon engine operating conditions and heat demand the necessary valve position to optimise performance would be selected. Valve position could be adjusted using either electro mechanical, vacuum, hydraulic or compressed air actuators dependent upon vehicle type and the available power sources.

Claims (7)

1. A method of controlling the flow of exhaust gasses in an internal combustion engine in order to allow the engine to be warmed up more quickly in which a heat exchanger is provided in a control duct of the engine exhaust system and a bypass duct is provided through which exhaust gasses can flow without passing through the heat exchanger, which method comprises progressively closing at least partially said bypass duct to divert at least a proportion of the exhaust gasses through said heat exchanger in the control duct thereby causing the engine coolant to extract heat from the heat exchanger.
2. A method of operating a control valve for controlling fluid flow in a pair of fluid passageways by progressively closing both of the passageways in such a way that one of the passageways is closed before the other.
3. An exhaust system for an internal combustion engine which system comprises a heat exchanger provided in a duct of the system, a bypass duct through which, in use, exhaust gasses can flow without passing through the heat exchanger and a control valve means to control the flow distribution of exhaust gasses through both ducts and/or to alter the back pressure in the system upstream of said control valve.
4. An exhaust system according to claim 3 wherein the heater exchanger duct and the bypass duct are controlled by said control valve means in parallel.
5. An exhaust system according to claim 3 or claim 4 wherein the ducts are controlled by said control valve means simultaneously.
6. An exhaust system according to any of claims 3 to 5 wherein the control valve means is upstream of the heat exchanger.
7. An exhaust system according to any of claims 3 to 5 wherein the control valve means is downstream of the heat exchanger.
GB9510080A 1995-05-18 1995-05-18 Exhaust gas heat exchanger in an internal combustion engine Withdrawn GB2301177A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB9510080A GB2301177A (en) 1995-05-18 1995-05-18 Exhaust gas heat exchanger in an internal combustion engine
PCT/GB1996/001180 WO1996036505A1 (en) 1995-05-18 1996-05-17 Control valve for heat exchangers in internal combustion engines
AU57704/96A AU5770496A (en) 1995-05-18 1996-05-17 Control valve for heat exchangers in internal combustion eng ines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9510080A GB2301177A (en) 1995-05-18 1995-05-18 Exhaust gas heat exchanger in an internal combustion engine

Publications (2)

Publication Number Publication Date
GB9510080D0 GB9510080D0 (en) 1995-07-12
GB2301177A true GB2301177A (en) 1996-11-27

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Family Applications (1)

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GB9510080A Withdrawn GB2301177A (en) 1995-05-18 1995-05-18 Exhaust gas heat exchanger in an internal combustion engine

Country Status (3)

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AU (1) AU5770496A (en)
GB (1) GB2301177A (en)
WO (1) WO1996036505A1 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19750588A1 (en) * 1997-11-17 1999-05-20 Behr Gmbh & Co Exhaust gas recirculation device for an internal combustion engine
GB2335483A (en) * 1998-03-19 1999-09-22 Ford Global Tech Inc Method and apparatus for cooling an engine using exhaust gas
FR2782745A1 (en) * 1998-09-01 2000-03-03 Valeo Thermique Moteur Sa Exhaust system for heat engines especially automobiles, has heat exchanger fitted with by pass valve to allow exhaust flow to be controlled through heat exchanger or by pass by single valve
EP0987427A1 (en) 1998-09-14 2000-03-22 Modine Manufacturing Company Device for recirculating an exhaust gas stream to the intake conduit of an engine
FR2785947A1 (en) * 1998-11-16 2000-05-19 Valeo Thermique Moteur Sa Exhaust system with heat recovery, for automobiles, has heat recovery device mounted in exhaust line, with by-pass to divert exhaust gas from heat recovery system and with flow control valve in by-pass.
EP0885758A3 (en) * 1997-06-18 2001-03-21 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Method of operating of an exhaust heat exchanger in an internal-combustion engine for a motor vehicle
FR2821298A1 (en) * 2001-02-28 2002-08-30 Peugeot Citroen Automobiles Sa Heater for motor vehicle passenger space has sensors to detect accelerator position and coolant temperature to control exhaust flow bypass control valve
EP1291499A1 (en) * 2001-09-11 2003-03-12 Arvin International (UK) Limited A heat exchanger, an exhaust assembly and a method of mounting the heat exchanger in an exhaust assembly
GB2381576A (en) * 2001-10-30 2003-05-07 Visteon Global Tech Inc Exhaust gas heat recovery in an inclined pipe
EP1512851A2 (en) * 2003-09-05 2005-03-09 Arvin Technologies, Inc. Method for controlling a valve for an exhaust system
US7581532B2 (en) 2004-11-26 2009-09-01 Siemens Aktiengesellschaft Method for recirculating a partial exhaust gas flow to an internal combustion engine of a motor vehicle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE514537C2 (en) 1998-11-12 2001-03-12 Volvo Ab Combustion engine installation in a motor vehicle
KR102542945B1 (en) * 2018-04-24 2023-06-15 현대자동차주식회사 Heat exchanger for vehicles

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4685430A (en) * 1985-03-20 1987-08-11 Valeo Motor vehicle exhaust gas heat exchanger for heating engine coolant and lubricating oil

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GB492287A (en) * 1937-03-17 1938-09-19 Herbert Linwood Sleigh Improvements relating to the heating of motor cars, motor boats, or the like by the passing of air over exhaust pipes, steam pipes, boiler flues, or the like
DE2305303A1 (en) * 1973-02-03 1974-08-08 Volkswagenwerk Ag HEATING DEVICE FOR MOTOR VEHICLES
US3998241A (en) * 1976-02-06 1976-12-21 Elk Manufacturing Company, Inc. Single control faucet
DE3603378A1 (en) * 1985-02-16 1986-08-21 Volkswagen AG, 3180 Wolfsburg Exhaust gas system for an internal combustion engine

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Publication number Priority date Publication date Assignee Title
US4685430A (en) * 1985-03-20 1987-08-11 Valeo Motor vehicle exhaust gas heat exchanger for heating engine coolant and lubricating oil

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0885758A3 (en) * 1997-06-18 2001-03-21 Bayerische Motoren Werke Aktiengesellschaft, Patentabteilung AJ-3 Method of operating of an exhaust heat exchanger in an internal-combustion engine for a motor vehicle
DE19750588B4 (en) * 1997-11-17 2016-10-13 MAHLE Behr GmbH & Co. KG Device for exhaust gas recirculation for an internal combustion engine
US6213105B1 (en) 1997-11-17 2001-04-10 Behr Gmbh & Co. Device for exhaust recycling for an internal combustion engine and method of making same
DE19750588A1 (en) * 1997-11-17 1999-05-20 Behr Gmbh & Co Exhaust gas recirculation device for an internal combustion engine
GB2335483A (en) * 1998-03-19 1999-09-22 Ford Global Tech Inc Method and apparatus for cooling an engine using exhaust gas
FR2782745A1 (en) * 1998-09-01 2000-03-03 Valeo Thermique Moteur Sa Exhaust system for heat engines especially automobiles, has heat exchanger fitted with by pass valve to allow exhaust flow to be controlled through heat exchanger or by pass by single valve
EP0987427A1 (en) 1998-09-14 2000-03-22 Modine Manufacturing Company Device for recirculating an exhaust gas stream to the intake conduit of an engine
FR2785947A1 (en) * 1998-11-16 2000-05-19 Valeo Thermique Moteur Sa Exhaust system with heat recovery, for automobiles, has heat recovery device mounted in exhaust line, with by-pass to divert exhaust gas from heat recovery system and with flow control valve in by-pass.
FR2821298A1 (en) * 2001-02-28 2002-08-30 Peugeot Citroen Automobiles Sa Heater for motor vehicle passenger space has sensors to detect accelerator position and coolant temperature to control exhaust flow bypass control valve
EP1291499A1 (en) * 2001-09-11 2003-03-12 Arvin International (UK) Limited A heat exchanger, an exhaust assembly and a method of mounting the heat exchanger in an exhaust assembly
GB2381576B (en) * 2001-10-30 2003-12-31 Visteon Global Tech Inc Exhaust-gas heat recovery installation
US6942027B2 (en) 2001-10-30 2005-09-13 Visteon Global Technologies, Inc. Exhaust-gas heat recovery appliance
GB2381576A (en) * 2001-10-30 2003-05-07 Visteon Global Tech Inc Exhaust gas heat recovery in an inclined pipe
EP1512851A2 (en) * 2003-09-05 2005-03-09 Arvin Technologies, Inc. Method for controlling a valve for an exhaust system
EP1512851A3 (en) * 2003-09-05 2005-10-19 Arvin Technologies, Inc. Method for controlling a valve for an exhaust system
US7353865B2 (en) 2003-09-05 2008-04-08 Arvinmeritor Technology, Llc Method for controlling a valve for an exhaust system
US7836945B2 (en) 2003-09-05 2010-11-23 Emcon Technologies Llc Method for controlling a valve for an exhaust system
US7581532B2 (en) 2004-11-26 2009-09-01 Siemens Aktiengesellschaft Method for recirculating a partial exhaust gas flow to an internal combustion engine of a motor vehicle

Also Published As

Publication number Publication date
WO1996036505A1 (en) 1996-11-21
GB9510080D0 (en) 1995-07-12
AU5770496A (en) 1996-11-29

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