CA2273698A1 - Heat exchanger for motor vehicle exhaust - Google Patents

Heat exchanger for motor vehicle exhaust Download PDF

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Publication number
CA2273698A1
CA2273698A1 CA002273698A CA2273698A CA2273698A1 CA 2273698 A1 CA2273698 A1 CA 2273698A1 CA 002273698 A CA002273698 A CA 002273698A CA 2273698 A CA2273698 A CA 2273698A CA 2273698 A1 CA2273698 A1 CA 2273698A1
Authority
CA
Canada
Prior art keywords
flow passage
fluid flow
heat exchange
heat exchanger
motor 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.)
Abandoned
Application number
CA002273698A
Other languages
French (fr)
Inventor
Easton Bennett
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to CA002273698A priority Critical patent/CA2273698A1/en
Priority to US09/512,911 priority patent/US6330910B1/en
Publication of CA2273698A1 publication Critical patent/CA2273698A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N5/00Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy
    • F01N5/02Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy the devices using heat
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/02Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
    • F28D7/024Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled the conduits of only one medium being helically coiled tubes, the coils having a cylindrical configuration
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • F28F27/02Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2240/00Combination 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
    • F01N2240/02Combination 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2410/00By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2025/00Measuring
    • F01P2025/08Temperature
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00Cooling circuits using auxiliaries
    • F01P2060/08Cabin heater
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00Cooling circuits using auxiliaries
    • F01P2060/16Outlet manifold
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2060/00Cooling circuits using auxiliaries
    • F01P2060/18Heater
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001Recuperative heat exchangers
    • F28D21/0003Recuperative heat exchangers the heat being recuperated from exhaust gases
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2250/00Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
    • F28F2250/06Derivation channels, e.g. bypass
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

Abstract

A heat exchanger for a motor vehicle exhaust includes a tubular body having a first end, a second end, a peripheral sidewall, and at least two flow passages that extend between the first end and the second end. The at least two flow passages include at least one heat exchange fluid flow passage and at least one bypass fluid flow passage. A heat exchange coil is positioned in the at least one heat exchange fluid flow passage. The heat exchange coil has an inlet and an outlet extending through the sidewall of the tubular body. A valve is provided for selecting between the at least one heat exchange fluid flow passage and the at least one bypass fluid flow passage.

Description

TITLE OF THE INVENTION:
Heat Exchanger For Motor Vehicle Exhaust NAMES) OF INVENTOR(S):
Easton Bennett FIELD OF THE INVENTION
The present invention relates to a heat exchanger for a motor vehicle exhaust BACKGROUND OF THE INVENTION
In Canadian Patent Application No. 2,185,076 (U. S. Patent 5,799,632) Easton Bennett disclosed a novel heat exchanger configuration for a motor vehicle exhaust. This heat exchanger had an exhaust pipe with a flow passage formed of a coil of tubing. The exchange medium flows through the coil as hot exhaust gases flow through the flow passage in the centre of the coil.
In Canadian Patent Application No. 2,247,759 (U. S. Patent Application No. 09/158,711) Easton Bennett disclosed an improvement to the novel heat exchanger configuration. This heat exchanger had the coil of tubing with the central flow passage positioned in a larger housing, thereby forming an annular flow down the outside of the coil of tubing, in addition to the central flow passage. This configuration proved to be even more efficient for heat transfer.
In some applications, however, there is a concern that the heat exchanger will work too well and the coolant used as exchange medium will become over heated.
SU1~IARY OF THE INVENTION
What is required is an alternative configuration of heat exchanger for a motor vehicle exhaust.
According to the present invention there is provided a heat exchanger for a motor vehicle exhaust which includes a tubular body having a first end, a second end, a peripheral sidewall, and at least two flow passages that extend between the first end and the second end. The at least two flow passages include at least one heat exchange fluid flow passage and at least one bypass fluid flow passage. A heat exchange coil is positioned in the at least one heat exchange fluid flow passage. The heat exchange coil has an inlet and an outlet extending through the sidewall of the tubular body. A valve is provided for selecting between the at least one heat exchange fluid flow passage and the at least one bypass fluid flow passage.
The heat exchanger, as described above, has a normal operating mode in which all exhaust gases are diverted through the heat exchange fluid flow passage to effect a heat exchange with fluid flowing through the heat exchange coil. However, when such a heat exchange is not desired, the valve is repositioned to divert all exhaust gases through the bypass fluid flow passage. It is also possible to put the valve in an intermediate position to have only a portion of the exhaust gases flow through the heat exchanger flow passage, as will hereinafter be further described.
BRIEF DESCRIPTION OF THE DRAWINGS
These and other features of the invention will become more apparent from the following description in which reference is made to the appended drawings, wherein:
FIGURE 1 is a top plan view, in section, of a heat exchanger for a motor vehicle exhaust constructed in accordance with the teachings of the present invention, with a valve positioned in a heat exchanger mode.
FIGURE 2 is a top plan view, in section, of the heat exchanger for a motor vehicle illustrated in FIGURE l, with the valve positioned in a heat bypass mode.
FIGURE 3 is a top plan view, in section, of the heat exchanger for a motor vehicle illustrated in FIGURE l, with the valve positioned in an intermediate mode.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
The preferred embodiment, a heat exchanger for a motor vehicle exhaust generally identified by reference numeral 100, will now be described with reference to FIGURES 1 through 3.
Referring to FIGURE 1 through 3, heat exchanger for a motor vehicle exhaust 100 includes a tubular body 102 having a first end 104, a second end 106, a peripheral sidewall 108, a heat exchange flow passage 110 and a bypass flow passage 112.
Each of heat exchange flow passage 110 and bypass flow passage 112 extends between first end 104 and second end 106. A dual wall 114 that has an insulating air flow cavity 116 is positioned between heat exchange fluid flow passage 110 and bypass fluid flow passage 112. A heat exchange coil 118 is positioned in heat exchange fluid flow passage 110. Heat exchange coil 118 has an inlet 120 and an outlet 122 extending through sidewall 108 of tubular body 102.
A pivotally movable valve member 124 is provided for selecting a path of fluid flow. Referring to FIGURE 1, when valve member 124 is in a first limiting position, fluid flows through heat exchange fluid flow passage 110. Referring to FIGURE 2, when valve member 124 is in a second limiting position, fluid flows through bypass fluid flow passage 112.
Referring to FIGURE 3, when valve member 124 is in an intermediate position, fluid flow is divided between heat exchange fluid flow passage 110 and bypass fluid flow passage 112.
The use and operation of heat exchanger 100 will now be described with reference to FIGURES 1 through 3. Heat exchanger 100 is designed to be used when one wishes to raise the temperature of automotive fluids or decrease the temperature of hot exhaust gases. This is accomplished when valve member 124 is positioned as illustrated in FIGURE 1. In cold weather conditions, it is advantageous to preheat fluids used in the in car heater or engine oil. Hot exhaust gases from the exhaust system provide a ready source of heat for this purpose. The automotive fluid to be preheated is circulated through heat exchange coil 118. In hot weather conditions, the heat generated by exhaust gases is sometimes so extreme that it fatigues and causes failure of some components. In such circumstances it is advantageous to draw heat away from the hot exhaust gases. Heat exchange coil 118 is used to circulate fluids which draw heat from the hot exhaust gases. When conditions change it may be necessary to stop further heat exchange from occurring or quantitatively reduce the heat exchange. To prevent the heat exchange from occurring, valve member 124 is placed in the position illustrated in FIGURE 2.
To reduce the magnitude of the heat exchange, valve member 124 is placed in the position illustrated in FIGURE 3.
It will be apparent to one skilled in the art that modifications may be made to the illustrated embodiment without departing from the spirit and scope of the invention as hereinafter defined in the Claims.

Claims (5)

1. A heat exchanger for a motor vehicle exhaust, comprising:
a tubular body having a first end, a second end, a peripheral sidewall, and at least two flow passages that extend between the first end and the second end, the at least two flow passages including at least one heat exchange fluid flow passage and at least one bypass fluid flow passage;
a heat exchange coil positioned in the at least one heat exchange fluid flow passage, the heat exchange coil having an inlet and an outlet extending through the sidewall of the tubular body;
a valve for selecting between the at least one heat exchange fluid flow passage and the at least one bypass fluid flow passage.
2. The heat exchanger as defined in Claim 1, wherein an insulating barrier is positioned between the at least one heat exchange fluid flow passage and the at least one bypass fluid flow passage.
3. The heat exchanger as defined in Claim 2, wherein the insulating barrier is a dual wall with an air barrier positioned inbetween.
4. A heat exchanger for a motor vehicle exhaust, comprising:
a tubular body having a first end, a second end, a peripheral sidewall, and at least two flow passages that extend between the first end and the second end, the at least two flow passages including at least one heat exchange fluid flow passage and at least one bypass fluid flow passage, with a dual wall having an insulating air flow cavity positioned between the at least one heat exchange fluid flow passage and the at least one bypass fluid flow passage;
a heat exchange coil positioned in the at least one heat exchange fluid flow passage, the heat exchange coil having an inlet and an outlet extending through the sidewall of the tubular body;
a pivotally movable valve member for selecting between the at least one heat exchange fluid flow passage and the at least one bypass fluid flow passage.
5. The heat exchanger as defined in Claim 4, wherein the valve member has an intermediate position in which the flow is divided between the at least one heat exchange fluid flow passage and the at least one bypass fluid flow passage.
CA002273698A 1999-03-03 1999-06-06 Heat exchanger for motor vehicle exhaust Abandoned CA2273698A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA002273698A CA2273698A1 (en) 1999-06-06 1999-06-06 Heat exchanger for motor vehicle exhaust
US09/512,911 US6330910B1 (en) 1999-03-03 2000-02-25 Heat exchanger for a motor vehicle exhaust

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA002273698A CA2273698A1 (en) 1999-06-06 1999-06-06 Heat exchanger for motor vehicle exhaust

Publications (1)

Publication Number Publication Date
CA2273698A1 true CA2273698A1 (en) 2000-12-08

Family

ID=31193596

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002273698A Abandoned CA2273698A1 (en) 1999-03-03 1999-06-06 Heat exchanger for motor vehicle exhaust

Country Status (1)

Country Link
CA (1) CA2273698A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2841595A1 (en) * 2002-06-26 2004-01-02 Benteler Automobiltechnik Gmbh Double skinned exhaust gas tube for use in a car exhaust has valve to allow cooling gas to flow through the annular chamber between the walls
EP1443186A1 (en) * 2003-01-31 2004-08-04 Arvin Technologies, Inc. Assembly comprising an exhaust gas heat exchanger and bypass
EP1512851A2 (en) * 2003-09-05 2005-03-09 Arvin Technologies, Inc. Method for controlling a valve for an exhaust system
WO2005075928A1 (en) * 2004-02-09 2005-08-18 Behr Gmbh & Co. Kg Arrangement for cooling the exhaust gas of a motor vehicle
DE102010014250A1 (en) 2010-04-08 2011-10-13 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Exhaust stream controlling device for internal combustion engine, has exhaust valves adjusting amount of exhaust streams supplied to exhaust gas passages through separate controllable valve trains
DE102011088019A1 (en) * 2011-12-08 2013-06-13 Continental Automotive Gmbh Internal combustion engine with turbocharger and exhaust gas cooler and method for controlling / regulating the operating temperature of the exhaust gas turbocharger

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2841595A1 (en) * 2002-06-26 2004-01-02 Benteler Automobiltechnik Gmbh Double skinned exhaust gas tube for use in a car exhaust has valve to allow cooling gas to flow through the annular chamber between the walls
EP1443186A1 (en) * 2003-01-31 2004-08-04 Arvin Technologies, Inc. Assembly comprising an exhaust gas heat exchanger and bypass
US7264040B2 (en) 2003-01-31 2007-09-04 Et Us Holdings Llc Exhaust gas heat exchanger and bypass assembly
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
WO2005075928A1 (en) * 2004-02-09 2005-08-18 Behr Gmbh & Co. Kg Arrangement for cooling the exhaust gas of a motor vehicle
DE102010014250A1 (en) 2010-04-08 2011-10-13 Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr Exhaust stream controlling device for internal combustion engine, has exhaust valves adjusting amount of exhaust streams supplied to exhaust gas passages through separate controllable valve trains
DE102011088019A1 (en) * 2011-12-08 2013-06-13 Continental Automotive Gmbh Internal combustion engine with turbocharger and exhaust gas cooler and method for controlling / regulating the operating temperature of the exhaust gas turbocharger
EP2602449A3 (en) * 2011-12-08 2014-01-01 Continental Automotive GmbH Combustion engine with exhaust gas turbocharger and exhaust gas cooler and method for controlling/regulating the working temperature of the exhaust gas turbocharger

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