US20090049832A1 - Exhaust heat recovery device - Google Patents
Exhaust heat recovery device Download PDFInfo
- Publication number
- US20090049832A1 US20090049832A1 US11/816,792 US81679206A US2009049832A1 US 20090049832 A1 US20090049832 A1 US 20090049832A1 US 81679206 A US81679206 A US 81679206A US 2009049832 A1 US2009049832 A1 US 2009049832A1
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- United States
- Prior art keywords
- valve body
- temperature
- medium
- exhaust
- exhaust gas
- 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.)
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Classifications
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- 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
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- 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
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- 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
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- 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
- F01N2410/02—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device in case of high temperature, e.g. overheating of catalytic reactor
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- 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
- F01N2410/14—By-passing, at least partially, exhaust from inlet to outlet of apparatus, to atmosphere or to other device in case of excessive pressure, e.g. using a safety valve
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- 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
Definitions
- the present invention relates to an exhaust heat recovery device provided in an exhaust system of a vehicle equipped with an internal combustion engine and recovering exhaust heat to use it for warm-up etc.
- an exhaust heat recovery device which opens and closes a valve body of an exhaust system according to the driving state of an internal combustion engine and the temperature of a medium (cooling water) and can perform switching control of the passage of exhaust gas between a heat exchanger in the exhaust system and a bypass route through which the exhaust gas bypasses the heat exchanger.
- an exhaust heat recovery device described in Patent Document 1 is intended to eliminate the defect of the driving performance in the cold state of a vehicle.
- Patent Document 1 JP-U-63-160315
- the exhaust heat recovery device described in the above-mentioned Patent Document 1 requires driving means such as a motor and a power driving actuator for driving a valve body used for switching control in the valve, control means such as a computer for controlling the same, and detecting means for detecting the rotational speed of the internal combustion engine and the temperature of the medium. Wiring and piping are required for connecting them and a dedicated design is required for each vehicle This cannot be an advantageous method in cost.
- the invention according to claim 1 is an exhaust heat recovery device provided in an exhaust system of an internal combustion engine and comprising a heat exchanger for performing heat exchange between exhaust gas and a medium, a bypass route through which the exhaust gas bypasses the heat exchanger, and a valve body for opening and closing the bypass route, wherein the exhaust heat recovery device comprises the valve body that operates to open the bypass route from a closed state against urging force of an urging member when the flow rate of the exhaust gas is equal to or higher than a predetermined value, and a temperature-activated actuator that causes the valve body to open when the temperature of the medium is equal to or higher than a predetermined value, whereby the valve body operates to open when at least one of the flow rate of the exhaust gas and the temperature of the medium is equal to or higher than the corresponding predetermined value.
- the invention according to claim 2 in the invention according to claim 1 , is an exhaust heat recovery device further including a crank mechanism that causes the valve body to open by an expanding movement of the temperature-activated actuator which expands and contracts according to the temperature of the medium, and a floating mechanism that couples the contracting movement of the temperature-activated actuator and the closing movement of the valve body in a floating state.
- the invention according to claim 3 in the invention according to claim 1 or 2 , is an exhaust heat recovery device wherein the temperature-activated actuator is a thermoelement which expands and contracts by an incorporated wax.
- the valve body when the flow rate of the exhaust gas is increased to be equal to or higher than the predetermined value, the valve body is opened so as to open the bypass route regardless of the temperature of the medium and the exhaust gas thus flows through the bypass route, bypassing the heat exchanger on the exhaust system, and accordingly, the flow resistance of the exhaust gas in the exhaust system can be reduced. It is therefore possible to eliminate the disadvantage of the driving performance when the vehicle is started in the insufficient warmed state.
- the temperature-activated actuator causes the valve body to open so as to open the bypass route, and the exhaust gas then bypasses the heat exchanger so as to flow through the bypass route, and accordingly, it is possible to suppress overheat of the medium flowing through the heat exchanger. Therefore, the overload on a cooling system of a vehicle concerned in a traffic jam can be prevented.
- the control of this exhaust heat recovery device is completed in the exhaust heat recovery device, and none of wiring, piping, detecting means, control means and power supply are required, thus, the present invention is excellent in mounting ability, economy effect, and reliability.
- FIGS. 1 to 3 show Embodiment 1 according to the present invention, in which FIG. 1 is a front view showing an exhaust heat recovery device 1 of Embodiment 1, FIG. 2 is a vertical section view of the exhaust heat recovery device 1 in FIG. 1 , and FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1 .
- the exhaust heat recovery device 1 is disposed in an exhaust system of a vehicle, etc., having an internal combustion engine; an upstream side exhaust pipe J is connected to the upstream side of the device 1 (on a left side in the drawing) and a downstream side exhaust pipe K is connected to the downstream side of the device 1 (on a right side in the drawing), as shown in FIG. 1 .
- a funnel-shaped cone 2 and one end of a first case 3 having a cylindrical shape, and the other end of the first case 3 and a second case 4 having a tubular shape are joined to each other so as to sandwich retainers 5 and 6 therebetween, respectively.
- a cover pipe 13 is provided inside the first case 3 substantially coaxially with the first case 3 and through both the retainers 5 and 6 in a liquid-tight manner, as shown in FIGS. 2 and 3 , and the first case 3 , the cover pipe 13 , and both the retainers 5 and 6 form a medium flow part 14 .
- a medium inlet 16 and a medium outlet 15 which are connected to a cooling system of the internal combustion engine are provided in the first case 3 so that a medium flows through the medium flow part 14 .
- Heat exchange pipes 17 having helical grooves formed therein are arranged in the medium flow part 14 , extending through both the retainers 5 and 6 , a plurality of the heat exchange pipes 17 are disposed so as to surround the outer circumference of the cover pipe 13 , as shown in FIG. 3 , and the heat exchange is performed between the medium flowing through the medium flow part 14 and the exhaust gas when exhaust gas flows through the heat exchange pipes 17 .
- the first case 3 , the retainers 5 and 6 , the cover pipe 13 , the medium flow part 14 , the medium inlet 16 , the medium outlet 15 , and the heat exchange pipes 17 constitute a heat exchanger.
- thermoelement 7 as a temperature-activated actuator, and an element cover 8 covering the same.
- the element cover 8 is constructed such that the medium flowing through the medium flow part 14 can flow in the inside of the element cover 8 so that the thermoelement 7 and the medium can contact with each other.
- the thermoelement 7 causes an activating arm 12 to perform a translatory expanding motion in the ⁇ direction, according to the heat expansion of the incorporated paraffin wax corresponding to a temperature rise of the flowing medium, and allows the activating arm 12 to perform a translatory contracting motion in the opposite direction to the above-mentioned direction by a return spring 9 disposed in the thermoelement 7 when the temperature of the medium is lowered and the paraffin wax contracts.
- the activating arm 12 has at its end an axially extending slot 26 and a rod 25 having a pin 27 engaging with the slot 26 can slide axially within the range of the slot 26 , so as to form a floating mechanism.
- a bypass pipe 18 forming a bypass route is disposed inside the cover pipe 13 substantially coaxially with the cover pipe 13 .
- the bypass pipe 18 is formed by a cylindrical pipe having upstream and downstream open ends, joined to the downstream end of the cover pipe 13 , and held onto the upstream end of the cover pipe 13 via a sliding member 19 . This can absorb a heat expansion difference between the cover pipe 13 and the bypass pipe 18 caused when the exhaust gas flows through the bypass pipe 18 , thereby improving durability.
- a valve seat 20 and a cushioning member 21 suppressing any hitting noise are provided at the downstream end of the bypass pipe 18 .
- a butterfly valve body 22 which contacts with the valve seat 20 and can open and close the bypass pipe 18 is rotatably provided on a valve shaft 10 disposed at a periphery near the end of the bypass pipe 18 , and is urged in the closing direction of the bypass pipe 18 by an urging spring, not shown.
- the valve body 22 closes the downstream end of the bypass pipe 18 by the urging force of the urging spring.
- the valve system opening and closing according to the flow rate of the exhaust gas is known in the exhaust devices as a variable valve.
- valve shaft 10 protrudes outside the second case 4
- one end of a crank 11 is integrally journaled to the protruding end of the valve shaft 10
- the rod 25 of the above-described floating mechanism is journaled to the other end of the crank 11 via a pivot 24 .
- the valve body 22 is rotated via the crank mechanism by the expansion and contraction of the thermoelement 7 .
- valve body 22 closes the bypass pipe 18 by the urging force of the urging spring, not shown.
- the exhaust gas forcibly flows through in the heat exchange pipes 17 to be heat-exchanged between the exhaust gas and the medium flowing through the medium flow part 14 .
- the exhaust gas rotates the valve body 22 in the ⁇ direction shown in FIG. 2 .
- the rod 25 is moved in the ⁇ direction shown in FIG. 1 , accompanying the rotation of the crank 11 provided integrally with the valve body 22 , but the valve body 22 can be rotated without being affected by the thermoelement 7 to open the bypass pipe 18 since the rod 25 is coupled to the activating arm 12 in the floating manner.
- thermoelement 7 expands to move the activating arm 12 in the ⁇ direction and the left end of the slot 26 in the drawing is engaged with the pin 27 to move the rod 25 in the ⁇ direction.
- the rotation of the crank 11 about the valve shaft 10 causes the valve body 22 integral therewith to rotate in the ⁇ direction and in the opening direction to open the bypass pipe 18 .
- Embodiment 1 when the flow rate of the exhaust gas is increased to be equal to or higher than the predetermined value, the bypass pipe 18 is opened regardless of the temperature of the medium and the exhaust gas then bypasses the heat exchange pipes 17 to flow through the bypass pipe 18 .
- the flow resistance of the exhaust gas can be reduced, and accordingly, it is possible to eliminate the disadvantage of the driving performance when a vehicle is started in the state that warm-up is insufficient.
- thermoelement 7 as the temperature-activated actuator causes the valve body 22 to open, and the exhaust gas bypasses the heat exchange pipes 17 to flow through the bypass pipe 18 , whereby the overheat of the medium can be prevented. Therefore, concerns of the overload on a cooling system of a vehicle equipped with an internal combustion engine in a traffic jam can be prevented.
- FIG. 4 is a schematic view showing an exhaust heat recovery device 31 of Embodiment 2 according to the present invention.
- the heat recovery device 31 is disposed in an exhaust system of a vehicle, etc., having an internal combustion engine; an upstream side exhaust pipe (not shown) is connected to the upstream side of the device (left side in the drawing) and a downstream side exhaust pipe (not shown) is connected to the downstream side of the device (right side in the drawing).
- a heat exchanger 32 is connected to a cooling system of the internal combustion engine, not shown, by a medium outlet 32 a and a medium inlet 32 b and constructed such that it can perform heat exchange between the exhaust gas and a medium flowing through the heat exchanger 32 .
- a bypass route 33 is provided to lead the exhaust gas to the downstream side exhaust pipe by bypassing the heat exchanger 32 .
- a butterfly valve body 35 is provided on a valve shaft 36 , being urged in the direction closing the bypass route 33 by an urging member 34 constituted by a spring, and the valve body 35 can rotate conjointly with the valve shaft 36 around the valve shaft 36 .
- the valve body 35 is rotated against the urging force of the urging member 34 to open the bypass route 33 .
- thermoelement 37 as the temperature-activated actuator is provided outside the heat exchanger 32 in such a manner that its heat receiving portion is brought into contact with the medium flowing through the heat exchanger 32 .
- the thermoelement 37 causes a first arm 38 a constituting an activating arm 38 to perform a translatory expanding motion in the ⁇ direction in FIG. 4 , according to the heat expansion of the incorporated paraffin wax corresponding to temperature rise of the medium, and allows the first arm 38 a of the activating arm 38 to perform a translatory contracting motion in the opposite direction to the above-mentioned direction by an incorporated return spring (not shown) when the paraffin wax is contracted.
- the free end of the first arm 38 a is rotatably coupled to a second arm 38 c by a rotational shaft 38 b .
- a crank 39 operatively coupling the activating arm 38 with the valve body 35 is provided for conjoint rotation with the valve shaft 36 .
- the crank 39 is formed in a substantially triangular shape around the valve shaft 36 and is provided with an arc slot 39 a around the valve shaft 36 .
- a pin 38 d provided at the free end of the second arm 38 c of the activating arm 38 is loosely fitted in the arc slot 39 a to be slidable within the range of the arc slot 39 a for forming the floating mechanism.
- valve body 35 closes the bypass pipe 33 by the urging force of the urging member 34 .
- the exhaust gas forcefully flows through the heat exchanger 32 to be heat-exchanged between the exhaust gas and the medium.
- thermoelement 37 expands to move the first arm 38 a of the activating arm 38 in the ⁇ direction.
- the pin 38 d at the free end of the second arm 38 c presses the lower end of the slot 39 a in the drawing downwardly to rotate the crank 39 in the counterclockwise direction.
- the second arm 38 c is rotated around the rotational shaft 38 b to the right side in the drawing and rotates the crank 39 without any trouble.
- the valve body 35 is rotated in the opening direction by the rotation of the crank 39 in the counterclockwise direction to open the bypass pipe 33 .
- Embodiment 2 can exhibit the same effect as Embodiment 1.
- FIGS. 5 to 8 show Embodiment 3 according to the present invention, in which FIG. 5 is a front view showing an exhaust heat recovery device 101 of Embodiment 3, FIG. 6 is a vertical section view showing the exhaust heat recovery device 101 of Embodiment 3, taken along line VI-VI in FIG. 5 , FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 5 , and FIGS. 8A to 8C are partially enlarged views showing operational states as seen in the D direction in FIG. 5 .
- the exhaust heat recovery device 101 is disposed in an exhaust system of a vehicle, etc., having an internal combustion engine. As shown in FIG. 5 , an upstream side exhaust pipe J is connected to the upstream side of the device (the left side in the drawing) and a downstream side exhaust pipe K is connected to the downstream side (the right side in the drawing) of the device.
- a first case 103 having a cylindrical shape is arranged on the upstream side of the exhaust heat recovery device 101 .
- a heat exchange pipe 117 is provided inside the first case 103 substantially coaxially with the first case 103 and in a liquid-tight manner at both ends of the first case 103 , and a medium flow part 114 is formed between the heat exchange pipe 117 and the first case 103 .
- the cross section of the heat exchange pipe 117 of this embodiment in the direction orthogonal to its axial direction is formed in a wavy shape alternately forming four mountain portions 117 a and four valley portions 117 b in the circumference direction.
- the four valley portions (groove portions) 117 b are helically formed in the axial direction.
- a medium outlet 115 connected to a cooling system of the internal combustion engine is provided in the first case 103 .
- a medium inlet 116 is provided in a later-described element cover 108 disposed outside the first case 103 .
- a medium flows through the medium flow part 114 and in the element cover 108 .
- the first case 103 , the medium flow part 114 , the medium outlet 115 , the medium inlet 116 , the heat exchange pipe 117 , and a space 118 c constitute a heat exchanger.
- a second case 104 including two portions divided in the circumference direction is joined to the heat exchange pipe 117 so as to sandwich therebetween a retainer 106 having an opening, not shown.
- a plurality of small-diameter communication holes 126 are formed to be communicated with the space 118 c formed between the bypass pipe 118 and the heat exchange pipe 117 .
- Exhaust gas in the bypass pipe 118 can flow into the space 118 c through the communication holes 126 .
- heat exchange is performed between the medium flowing through the medium flow part 114 and the exhaust gas.
- a butterfly valve body 122 opening and closing the bypass pipe 118 is provided integrally with a valve shaft 110 pivotally mounted to the bypass pipe 118 , and is urged in the closing direction by an urging spring 125 urging the rotation of the valve shaft in the fixed direction.
- a cushioning member 121 suppressing any hitting noise of the valve body 122 onto the bypass pipe 118 is provided at the downstream end of the bypass pipe 118 .
- the valve body 122 when the flow rate of the exhaust gas flowing through the bypass pipe 118 is equal to or lower than the predetermined value, the valve body 122 is urged by the urging spring 125 to close the downstream end of the bypass pipe 118 .
- the valve body 122 is opened against the urging force of the urging spring 125 .
- the element cover 108 provided with a thermoelement 107 as the above-described temperature-activated actuator is disposed outside the first case 103 .
- the medium circulating through the cooling portion of the internal combustion engine flows into the element cover 108 through the medium inlet 116 .
- thermoelement 107 is arranged in such a manner that its heat receiving portion contacts the medium flowing through the element cover 108 , and corresponding to the temperature of the medium, the thermoelement 107 causes the activating arm 112 to perform a translatory expanding motion in the ⁇ direction in FIG. 5 , according to the heat expansion of the incorporated paraffin wax when the temperature is high, and allows the activating arm 112 to perform a translatory contracting motion in the opposite direction to the above-mentioned direction by a return spring (not shown) when the temperature is low and the paraffin wax contracts.
- a crank 111 is provided integrally with the valve shaft 110 for conjoint movement with the valve body 122 , an engaging strip 111 a formed on the crank 111 is arranged to face the activating arm 112 , and the crank 111 opening and closing the valve body 122 by expanding and contracting the activating arm 112 is provided to be rotated integrally with the valve shaft 110 .
- the activating arm 112 and the crank 111 are not joined to each other, can contact with each other, and can be spaced from each other, thereby forming the floating mechanism.
- Embodiment 3 The operation of Embodiment 3 will be described.
- FIGS. 8A to 8C are partially enlarged views showing operational states as seen from the D direction in FIG. 5 .
- FIG. 8A shows a case where the flow rate of the exhaust gas and the temperature of the medium are both equal to or lower than the predetermined value.
- the valve body 122 closes the bypass pipe 118 according to the urging force of the urging spring 125 .
- the thermoelement 107 is also in the contracted state, and the activating arm 112 is spaced from the engaging strip 111 a of the crank 111 .
- FIG. 8B shows a case where the flow rate of the exhaust gas is equal to or higher than the predetermined value and the temperature of the medium is equal to or lower than the predetermined value.
- thermoelement 107 is in the contracted state, but the flow of the exhaust gas pushes the valve body 122 to open the bypass pipe 118 against the urging force of the urging spring 125 .
- the crank 111 rotated integrally with the valve body 122 is provided so that it can be spaced from the activating arm 112 , the valve body 122 is rotated in the opening direction to open the bypass pipe 18 even if the thermoelement 107 does not operates and the activating arm 112 does not expand.
- FIG. 8C shows a case where the temperature of the medium is equal to or higher than the predetermined value and the flow rate of the exhaust gas is equal to or lower than the predetermined value.
- thermoelement 107 expands so that the activating arm 112 is brought into contact with the engaging strip 111 a of the crank 111 to push it to thereby rotate the crank 111 .
- the valve body 122 rotated integrally with the crank 111 is rotated in the opening direction to open the bypass pipe 18 .
- Embodiment 3 can exhibit the same effect as Embodiment 1.
- the urging member of the valve body may serve as the urging member (return spring) included in the thermoelement.
- a bimetal or a shape-memory alloy is used for the temperature-activated actuator.
- the valve body may be rotated by shape change of these.
- a heat exchanger, a valve body, an urging member, a crank mechanism, and a floating mechanism of conventionally known constitution can be optionally employed.
- a sound absorbing material may be provided in the bypass route and the heat exchange route to provide a noise suppressing function to the heat recovery device.
- the present invention is not limited to a heat recovery device (heat collector, oil warmer, and the like) in a narrow sense mainly for heat recovery of a medium, and includes a heat exchanger (exhaust cooler, EGR cooler, and the like) mainly for cooling exhaust gas as a heat recovery device.
- the present invention is riot limited for being applied to an internal combustion engine of a vehicle and can be applied to exhaust systems of all exhaust gas generators such as a general-purpose engine and a stationary type combustor.
- FIG. 1 is a front view showing an exhaust heat recovery device of Embodiment 1 according to the present invention
- FIG. 2 is a vertical section view of the exhaust heat recovery device in FIG. 1 ;
- FIG. 3 is a cross-sectional view taken along line III-III in FIG. 1 ;
- FIG. 4 is a schematic view showing an exhaust heat recovery device of Embodiment 2 according to the present invention.
- FIG. 5 is a front view showing an exhaust heat recovery device of Embodiment 3 according to the present invention.
- FIG. 6 is a vertical section view of the exhaust heat recovery device taken along line VI-VI in FIG. 5 ;
- FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 5 ;
- FIG. 8A is a partially enlarged view showing an operated state as seen in the D direction in FIG. 5 ;
- FIG. 8B is a partially enlarged view showing another operated state as seen in the D direction in FIG. 5 ;
- FIG. 8C is a partially enlarged view showing a further operated state as seen in the D direction in FIG. 5 .
Abstract
An exhaust heat recovery device provided in an exhaust system of an engine etc., having a heat exchanger for performing heat exchange between exhaust gas and a medium, a bypass route through which the exhaust gas bypasses the heat exchanger, and a valve body for opening and closing the bypass route, wherein wiring and piping are reduced to make the device advantageous in cost. The exhaust heat recovery device has a valve body that, when the flow rate of the exhaust gas is equal to or higher than a predetermined value, opens the bypass route from a closed state against urging force of an urging body. The exhaust heat recovery device also has a temperature-activated actuator that opens the valve body when the temperature of the medium is equal to or higher than a predetermined value. The construction causes the valve body to be opened when at least either of the flow rate of the exhaust gas and the temperature of the medium is equal to or higher than the predetermined value.
Description
- The present invention relates to an exhaust heat recovery device provided in an exhaust system of a vehicle equipped with an internal combustion engine and recovering exhaust heat to use it for warm-up etc.
- There has been known such an exhaust heat recovery device which opens and closes a valve body of an exhaust system according to the driving state of an internal combustion engine and the temperature of a medium (cooling water) and can perform switching control of the passage of exhaust gas between a heat exchanger in the exhaust system and a bypass route through which the exhaust gas bypasses the heat exchanger. By controlling in this manner, an exhaust heat recovery device described in
Patent Document 1, for example, is intended to eliminate the defect of the driving performance in the cold state of a vehicle. - Patent Document 1: JP-U-63-160315
- The exhaust heat recovery device described in the above-mentioned
Patent Document 1 requires driving means such as a motor and a power driving actuator for driving a valve body used for switching control in the valve, control means such as a computer for controlling the same, and detecting means for detecting the rotational speed of the internal combustion engine and the temperature of the medium. Wiring and piping are required for connecting them and a dedicated design is required for each vehicle This cannot be an advantageous method in cost. - To solve the above problems, the invention according to
claim 1 is an exhaust heat recovery device provided in an exhaust system of an internal combustion engine and comprising a heat exchanger for performing heat exchange between exhaust gas and a medium, a bypass route through which the exhaust gas bypasses the heat exchanger, and a valve body for opening and closing the bypass route, wherein the exhaust heat recovery device comprises the valve body that operates to open the bypass route from a closed state against urging force of an urging member when the flow rate of the exhaust gas is equal to or higher than a predetermined value, and a temperature-activated actuator that causes the valve body to open when the temperature of the medium is equal to or higher than a predetermined value, whereby the valve body operates to open when at least one of the flow rate of the exhaust gas and the temperature of the medium is equal to or higher than the corresponding predetermined value. - The invention according to
claim 2, in the invention according toclaim 1, is an exhaust heat recovery device further including a crank mechanism that causes the valve body to open by an expanding movement of the temperature-activated actuator which expands and contracts according to the temperature of the medium, and a floating mechanism that couples the contracting movement of the temperature-activated actuator and the closing movement of the valve body in a floating state. - The invention according to
claim 3, in the invention according toclaim - According to the present invention, when the flow rate of the exhaust gas is increased to be equal to or higher than the predetermined value, the valve body is opened so as to open the bypass route regardless of the temperature of the medium and the exhaust gas thus flows through the bypass route, bypassing the heat exchanger on the exhaust system, and accordingly, the flow resistance of the exhaust gas in the exhaust system can be reduced. It is therefore possible to eliminate the disadvantage of the driving performance when the vehicle is started in the insufficient warmed state. Further, also in the state where the flow rate of the exhaust gas is low and the bypass route is closed by the valve body, if the temperature of the medium is equal to or higher than the predetermined value, the temperature-activated actuator causes the valve body to open so as to open the bypass route, and the exhaust gas then bypasses the heat exchanger so as to flow through the bypass route, and accordingly, it is possible to suppress overheat of the medium flowing through the heat exchanger. Therefore, the overload on a cooling system of a vehicle concerned in a traffic jam can be prevented.
- Also, the control of this exhaust heat recovery device is completed in the exhaust heat recovery device, and none of wiring, piping, detecting means, control means and power supply are required, thus, the present invention is excellent in mounting ability, economy effect, and reliability.
- Best mode for carrying out the present invention will be described on the basis of embodiments shown in
FIGS. 1 to 8C . -
FIGS. 1 to 3 show Embodiment 1 according to the present invention, in whichFIG. 1 is a front view showing an exhaustheat recovery device 1 ofEmbodiment 1,FIG. 2 is a vertical section view of the exhaustheat recovery device 1 inFIG. 1 , andFIG. 3 is a cross-sectional view taken along line III-III inFIG. 1 . - The exhaust
heat recovery device 1 is disposed in an exhaust system of a vehicle, etc., having an internal combustion engine; an upstream side exhaust pipe J is connected to the upstream side of the device 1 (on a left side in the drawing) and a downstream side exhaust pipe K is connected to the downstream side of the device 1 (on a right side in the drawing), as shown inFIG. 1 . A funnel-shaped cone 2 and one end of afirst case 3 having a cylindrical shape, and the other end of thefirst case 3 and asecond case 4 having a tubular shape are joined to each other so as tosandwich retainers - A
cover pipe 13 is provided inside thefirst case 3 substantially coaxially with thefirst case 3 and through both theretainers FIGS. 2 and 3 , and thefirst case 3, thecover pipe 13, and both theretainers medium flow part 14. Amedium inlet 16 and amedium outlet 15 which are connected to a cooling system of the internal combustion engine are provided in thefirst case 3 so that a medium flows through themedium flow part 14.Heat exchange pipes 17 having helical grooves formed therein are arranged in themedium flow part 14, extending through both theretainers heat exchange pipes 17 are disposed so as to surround the outer circumference of thecover pipe 13, as shown inFIG. 3 , and the heat exchange is performed between the medium flowing through themedium flow part 14 and the exhaust gas when exhaust gas flows through theheat exchange pipes 17. InEmbodiment 1, thefirst case 3, theretainers cover pipe 13, themedium flow part 14, themedium inlet 16, themedium outlet 15, and theheat exchange pipes 17 constitute a heat exchanger. - Outside the
first case 3, there are provided athermoelement 7 as a temperature-activated actuator, and anelement cover 8 covering the same. Theelement cover 8 is constructed such that the medium flowing through themedium flow part 14 can flow in the inside of theelement cover 8 so that thethermoelement 7 and the medium can contact with each other. Thethermoelement 7 causes an activatingarm 12 to perform a translatory expanding motion in the β direction, according to the heat expansion of the incorporated paraffin wax corresponding to a temperature rise of the flowing medium, and allows the activatingarm 12 to perform a translatory contracting motion in the opposite direction to the above-mentioned direction by areturn spring 9 disposed in thethermoelement 7 when the temperature of the medium is lowered and the paraffin wax contracts. The activatingarm 12 has at its end an axially extendingslot 26 and arod 25 having apin 27 engaging with theslot 26 can slide axially within the range of theslot 26, so as to form a floating mechanism. - A
bypass pipe 18 forming a bypass route is disposed inside thecover pipe 13 substantially coaxially with thecover pipe 13. Thebypass pipe 18 is formed by a cylindrical pipe having upstream and downstream open ends, joined to the downstream end of thecover pipe 13, and held onto the upstream end of thecover pipe 13 via a slidingmember 19. This can absorb a heat expansion difference between thecover pipe 13 and thebypass pipe 18 caused when the exhaust gas flows through thebypass pipe 18, thereby improving durability. - As shown in
FIG. 2 , avalve seat 20 and acushioning member 21 suppressing any hitting noise are provided at the downstream end of thebypass pipe 18. Abutterfly valve body 22 which contacts with thevalve seat 20 and can open and close thebypass pipe 18 is rotatably provided on avalve shaft 10 disposed at a periphery near the end of thebypass pipe 18, and is urged in the closing direction of thebypass pipe 18 by an urging spring, not shown. When the flow rate of the exhaust gas flowing through thebypass pipe 18 is equal to or lower than a predetermined value, thevalve body 22 closes the downstream end of thebypass pipe 18 by the urging force of the urging spring. The valve system opening and closing according to the flow rate of the exhaust gas is known in the exhaust devices as a variable valve. - One end of the
valve shaft 10 protrudes outside thesecond case 4, one end of acrank 11 is integrally journaled to the protruding end of thevalve shaft 10, and therod 25 of the above-described floating mechanism is journaled to the other end of thecrank 11 via apivot 24. Thevalve body 22 is rotated via the crank mechanism by the expansion and contraction of thethermoelement 7. - The operation of the thus-constituted exhaust
heat recovery device 1 ofEmbodiment 1 will be described. - When the flow rate of the exhaust gas and the temperature of the medium are equal to or lower than the respectively predetermined values, the
valve body 22 closes thebypass pipe 18 by the urging force of the urging spring, not shown. The exhaust gas forcibly flows through in theheat exchange pipes 17 to be heat-exchanged between the exhaust gas and the medium flowing through themedium flow part 14. - When the flow rate of the exhaust gas is equal to or higher than the predetermined value, even if the temperature of the medium is equal to or lower than the predetermined value, the exhaust gas rotates the
valve body 22 in the α direction shown inFIG. 2 . Therod 25 is moved in the β direction shown inFIG. 1 , accompanying the rotation of thecrank 11 provided integrally with thevalve body 22, but thevalve body 22 can be rotated without being affected by thethermoelement 7 to open thebypass pipe 18 since therod 25 is coupled to the activatingarm 12 in the floating manner. - When the temperature of the medium is equal to or higher than the predetermined value, even if the flow rate of the exhaust gas is equal to or lower than the predetermined value, the
thermoelement 7 expands to move the activatingarm 12 in the β direction and the left end of theslot 26 in the drawing is engaged with thepin 27 to move therod 25 in the β direction. Along with it, the rotation of thecrank 11 about thevalve shaft 10 causes thevalve body 22 integral therewith to rotate in the α direction and in the opening direction to open thebypass pipe 18. - In
Embodiment 1, when the flow rate of the exhaust gas is increased to be equal to or higher than the predetermined value, thebypass pipe 18 is opened regardless of the temperature of the medium and the exhaust gas then bypasses theheat exchange pipes 17 to flow through thebypass pipe 18. Thus, the flow resistance of the exhaust gas can be reduced, and accordingly, it is possible to eliminate the disadvantage of the driving performance when a vehicle is started in the state that warm-up is insufficient. On the other hand, even in the state that the flow rate of the exhaust gas is low and thebypass pipe 18 is closed by thevalve body 22, when the temperature of the medium is equal to or higher than the predetermined value, thethermoelement 7 as the temperature-activated actuator causes thevalve body 22 to open, and the exhaust gas bypasses theheat exchange pipes 17 to flow through thebypass pipe 18, whereby the overheat of the medium can be prevented. Therefore, concerns of the overload on a cooling system of a vehicle equipped with an internal combustion engine in a traffic jam can be prevented. -
FIG. 4 is a schematic view showing an exhaust heat recovery device 31 ofEmbodiment 2 according to the present invention. - The heat recovery device 31 is disposed in an exhaust system of a vehicle, etc., having an internal combustion engine; an upstream side exhaust pipe (not shown) is connected to the upstream side of the device (left side in the drawing) and a downstream side exhaust pipe (not shown) is connected to the downstream side of the device (right side in the drawing). A heat exchanger 32 is connected to a cooling system of the internal combustion engine, not shown, by a
medium outlet 32 a and amedium inlet 32 b and constructed such that it can perform heat exchange between the exhaust gas and a medium flowing through the heat exchanger 32. Abypass route 33 is provided to lead the exhaust gas to the downstream side exhaust pipe by bypassing the heat exchanger 32. On the way of thebypass route 33, abutterfly valve body 35 is provided on avalve shaft 36, being urged in the direction closing thebypass route 33 by anurging member 34 constituted by a spring, and thevalve body 35 can rotate conjointly with thevalve shaft 36 around thevalve shaft 36. When the flow rate of the exhaust gas is equal to or higher than the predetermined value, thevalve body 35 is rotated against the urging force of theurging member 34 to open thebypass route 33. - A
thermoelement 37 as the temperature-activated actuator is provided outside the heat exchanger 32 in such a manner that its heat receiving portion is brought into contact with the medium flowing through the heat exchanger 32. Thethermoelement 37 causes afirst arm 38 a constituting an activatingarm 38 to perform a translatory expanding motion in the β direction inFIG. 4 , according to the heat expansion of the incorporated paraffin wax corresponding to temperature rise of the medium, and allows thefirst arm 38 a of the activatingarm 38 to perform a translatory contracting motion in the opposite direction to the above-mentioned direction by an incorporated return spring (not shown) when the paraffin wax is contracted. The free end of thefirst arm 38 a is rotatably coupled to asecond arm 38 c by arotational shaft 38 b. In addition, acrank 39 operatively coupling the activatingarm 38 with thevalve body 35 is provided for conjoint rotation with thevalve shaft 36. In addition, as shown inFIG. 4 , thecrank 39 is formed in a substantially triangular shape around thevalve shaft 36 and is provided with an arc slot 39 a around thevalve shaft 36. Apin 38 d provided at the free end of thesecond arm 38 c of the activatingarm 38 is loosely fitted in the arc slot 39 a to be slidable within the range of the arc slot 39 a for forming the floating mechanism. - The operation of the thus-constituted exhaust heat recovery device 31 of
Embodiment 2 will be described. - When the flow rate of the exhaust gas and the temperature of the medium are both equal to or lower than the respectively predetermined values, the
valve body 35 closes thebypass pipe 33 by the urging force of the urgingmember 34. The exhaust gas forcefully flows through the heat exchanger 32 to be heat-exchanged between the exhaust gas and the medium. - When the flow rate of the exhaust gas is equal to or higher than the predetermined value, even if the temperature of the medium is equal to or lower than the predetermined value, the exhaust gas rotates the
valve body 35 in the α direction shown inFIG. 4 . Thecrank 39 is rotated in the counterclockwise direction inFIG. 4 with the rotation of thevalve body 35. Thepin 38 d of the activatingarm 38 is slid in the slot 39 a. Thevalve body 35 is rotated without being affected by thethermoelement 37 to open thebypass pipe 33. - Even if the flow rate of the exhaust gas is equal to or lower than the predetermined value, when the temperature of the medium is equal to or higher than the predetermined value, the
thermoelement 37 expands to move thefirst arm 38 a of the activatingarm 38 in the β direction. Thepin 38 d at the free end of thesecond arm 38 c presses the lower end of the slot 39 a in the drawing downwardly to rotate thecrank 39 in the counterclockwise direction. At the rotation, thesecond arm 38 c is rotated around therotational shaft 38 b to the right side in the drawing and rotates thecrank 39 without any trouble. Thevalve body 35 is rotated in the opening direction by the rotation of thecrank 39 in the counterclockwise direction to open thebypass pipe 33. -
Embodiment 2 can exhibit the same effect asEmbodiment 1. -
FIGS. 5 to 8 show Embodiment 3 according to the present invention, in whichFIG. 5 is a front view showing an exhaustheat recovery device 101 ofEmbodiment 3,FIG. 6 is a vertical section view showing the exhaustheat recovery device 101 ofEmbodiment 3, taken along line VI-VI inFIG. 5 ,FIG. 7 is a cross-sectional view taken along line VII-VII inFIG. 5 , andFIGS. 8A to 8C are partially enlarged views showing operational states as seen in the D direction inFIG. 5 . - The exhaust
heat recovery device 101 is disposed in an exhaust system of a vehicle, etc., having an internal combustion engine. As shown inFIG. 5 , an upstream side exhaust pipe J is connected to the upstream side of the device (the left side in the drawing) and a downstream side exhaust pipe K is connected to the downstream side (the right side in the drawing) of the device. - A
first case 103 having a cylindrical shape is arranged on the upstream side of the exhaustheat recovery device 101. As shown inFIG. 6 , aheat exchange pipe 117 is provided inside thefirst case 103 substantially coaxially with thefirst case 103 and in a liquid-tight manner at both ends of thefirst case 103, and amedium flow part 114 is formed between theheat exchange pipe 117 and thefirst case 103. As shown inFIG. 7 , the cross section of theheat exchange pipe 117 of this embodiment in the direction orthogonal to its axial direction is formed in a wavy shape alternately forming fourmountain portions 117 a and fourvalley portions 117 b in the circumference direction. The four valley portions (groove portions) 117 b are helically formed in the axial direction. - A
medium outlet 115 connected to a cooling system of the internal combustion engine is provided in thefirst case 103. Amedium inlet 116 is provided in a later-describedelement cover 108 disposed outside thefirst case 103. A medium flows through themedium flow part 114 and in theelement cover 108. InEmbodiment 3, thefirst case 103, themedium flow part 114, themedium outlet 115, themedium inlet 116, theheat exchange pipe 117, and aspace 118 c constitute a heat exchanger. - On the downstream side of the
heat exchange pipe 117, asecond case 104 including two portions divided in the circumference direction is joined to theheat exchange pipe 117 so as to sandwich therebetween aretainer 106 having an opening, not shown. - A
bypass pipe 118 forming a bypass route therein is formed by two pipes including an upstreamside bypass pipe 118 a and a downstream side bypass pipe 118 b connected by fitting one in another via a slidingmember 119, the upstream end and the downstream end of thebypass pipe 118 are opened, and thebypass pipe 118 is retained inside theheat exchange pipe 117 substantially coaxially with thefirst case 103 by the upstream side end of theheat exchange pipe 117 and theretainer 106 provided on the downstream side of theheat exchange pipe 117. - Near the upstream end of the
bypass pipe 118, a plurality of small-diameter communication holes 126 are formed to be communicated with thespace 118 c formed between thebypass pipe 118 and theheat exchange pipe 117. Exhaust gas in thebypass pipe 118 can flow into thespace 118 c through the communication holes 126. Upon the flow of the exhaust gas, heat exchange is performed between the medium flowing through themedium flow part 114 and the exhaust gas. - In the downstream portion of the
bypass pipe 118, abutterfly valve body 122 opening and closing thebypass pipe 118 is provided integrally with avalve shaft 110 pivotally mounted to thebypass pipe 118, and is urged in the closing direction by an urgingspring 125 urging the rotation of the valve shaft in the fixed direction. A cushioningmember 121 suppressing any hitting noise of thevalve body 122 onto thebypass pipe 118 is provided at the downstream end of thebypass pipe 118. - With this constitution, when the flow rate of the exhaust gas flowing through the
bypass pipe 118 is equal to or lower than the predetermined value, thevalve body 122 is urged by the urgingspring 125 to close the downstream end of thebypass pipe 118. When the flow rate of the exhaust gas is equal to or higher than the predetermined value, thevalve body 122 is opened against the urging force of the urgingspring 125. - As shown in
FIG. 5 , theelement cover 108 provided with athermoelement 107 as the above-described temperature-activated actuator is disposed outside thefirst case 103. The medium circulating through the cooling portion of the internal combustion engine flows into theelement cover 108 through themedium inlet 116. - The
thermoelement 107 is arranged in such a manner that its heat receiving portion contacts the medium flowing through theelement cover 108, and corresponding to the temperature of the medium, thethermoelement 107 causes the activatingarm 112 to perform a translatory expanding motion in the β direction inFIG. 5 , according to the heat expansion of the incorporated paraffin wax when the temperature is high, and allows the activatingarm 112 to perform a translatory contracting motion in the opposite direction to the above-mentioned direction by a return spring (not shown) when the temperature is low and the paraffin wax contracts. - A
crank 111 is provided integrally with thevalve shaft 110 for conjoint movement with thevalve body 122, an engagingstrip 111 a formed on thecrank 111 is arranged to face the activatingarm 112, and thecrank 111 opening and closing thevalve body 122 by expanding and contracting the activatingarm 112 is provided to be rotated integrally with thevalve shaft 110. - The activating
arm 112 and thecrank 111 are not joined to each other, can contact with each other, and can be spaced from each other, thereby forming the floating mechanism. - The operation of
Embodiment 3 will be described. -
FIGS. 8A to 8C are partially enlarged views showing operational states as seen from the D direction inFIG. 5 . -
FIG. 8A shows a case where the flow rate of the exhaust gas and the temperature of the medium are both equal to or lower than the predetermined value. In this case, thevalve body 122 closes thebypass pipe 118 according to the urging force of the urgingspring 125. Thethermoelement 107 is also in the contracted state, and the activatingarm 112 is spaced from the engagingstrip 111 a of thecrank 111. -
FIG. 8B shows a case where the flow rate of the exhaust gas is equal to or higher than the predetermined value and the temperature of the medium is equal to or lower than the predetermined value. - In this case, the
thermoelement 107 is in the contracted state, but the flow of the exhaust gas pushes thevalve body 122 to open thebypass pipe 118 against the urging force of the urgingspring 125. At this time, since thecrank 111 rotated integrally with thevalve body 122 is provided so that it can be spaced from the activatingarm 112, thevalve body 122 is rotated in the opening direction to open thebypass pipe 18 even if thethermoelement 107 does not operates and the activatingarm 112 does not expand. -
FIG. 8C shows a case where the temperature of the medium is equal to or higher than the predetermined value and the flow rate of the exhaust gas is equal to or lower than the predetermined value. - In this case, the
thermoelement 107 expands so that the activatingarm 112 is brought into contact with theengaging strip 111 a of thecrank 111 to push it to thereby rotate thecrank 111. Thus, thevalve body 122 rotated integrally with thecrank 111 is rotated in the opening direction to open thebypass pipe 18. -
Embodiment 3 can exhibit the same effect asEmbodiment 1. - The embodiments according to the present invention are described above, but the present invention is not limited to the above embodiments, and design changes in the scope without departing from the purport of the present invention are included in the present invention.
- For example, the urging member of the valve body may serve as the urging member (return spring) included in the thermoelement.
- A bimetal or a shape-memory alloy is used for the temperature-activated actuator. The valve body may be rotated by shape change of these.
- A heat exchanger, a valve body, an urging member, a crank mechanism, and a floating mechanism of conventionally known constitution can be optionally employed.
- A sound absorbing material may be provided in the bypass route and the heat exchange route to provide a noise suppressing function to the heat recovery device.
- The present invention is not limited to a heat recovery device (heat collector, oil warmer, and the like) in a narrow sense mainly for heat recovery of a medium, and includes a heat exchanger (exhaust cooler, EGR cooler, and the like) mainly for cooling exhaust gas as a heat recovery device. The present invention is riot limited for being applied to an internal combustion engine of a vehicle and can be applied to exhaust systems of all exhaust gas generators such as a general-purpose engine and a stationary type combustor.
-
FIG. 1 is a front view showing an exhaust heat recovery device ofEmbodiment 1 according to the present invention; -
FIG. 2 is a vertical section view of the exhaust heat recovery device inFIG. 1 ; -
FIG. 3 is a cross-sectional view taken along line III-III inFIG. 1 ; -
FIG. 4 is a schematic view showing an exhaust heat recovery device ofEmbodiment 2 according to the present invention; -
FIG. 5 is a front view showing an exhaust heat recovery device ofEmbodiment 3 according to the present invention; -
FIG. 6 is a vertical section view of the exhaust heat recovery device taken along line VI-VI inFIG. 5 ; -
FIG. 7 is a cross-sectional view taken along line VII-VII inFIG. 5 ; -
FIG. 8A is a partially enlarged view showing an operated state as seen in the D direction inFIG. 5 ; -
FIG. 8B is a partially enlarged view showing another operated state as seen in the D direction inFIG. 5 ; and -
FIG. 8C is a partially enlarged view showing a further operated state as seen in the D direction inFIG. 5 .
Claims (4)
1. An exhaust heat recovery device provided in an exhaust system of an internal combustion engine or the like and comprising a heat exchanger for performing heat exchange between exhaust gas and a medium, a bypass route through which the exhaust gas bypasses the heat exchanger, and a valve body for opening and closing the bypass route,
wherein said exhaust heat recovery device further comprises a valve body that operates to open said bypass route from a closed state against urging force of an urging member when a flow rate of the exhaust gas is equal to or higher than a predetermined value, and a temperature-activated actuator that causes said valve body to open when the temperature of said medium is equal to or higher than a predetermined value, whereby said valve body operates to open when at least one of the flow rate of the exhaust gas and the temperature of the medium is equal to or higher than the corresponding predetermined value.
2. The exhaust heat recovery device according to claim 1 , further comprising a crank mechanism that causes said valve body to open by an expanding movement of said temperature-activated actuator which expands and contracts according to the temperature of said medium, and a floating mechanism that couples the contracting movement of said temperature-activated actuator and the closing movement of said valve body in an floating state.
3. The exhaust heat recovery device according to claim 1 , wherein said temperature-activated actuator is a thermoelement which expands and contracts by an incorporated wax.
4. The exhaust heat recovery device according to claim 2 , wherein said temperature-activated actuator is a thermoelement which expands and contracts by an incorporated wax.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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JP2005-087052 | 2005-02-23 | ||
JP2005087052 | 2005-02-23 | ||
PCT/JP2006/303135 WO2006090725A1 (en) | 2005-02-23 | 2006-02-22 | Exhaust heat recovery device |
Publications (1)
Publication Number | Publication Date |
---|---|
US20090049832A1 true US20090049832A1 (en) | 2009-02-26 |
Family
ID=36927363
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/816,792 Abandoned US20090049832A1 (en) | 2005-02-23 | 2006-02-22 | Exhaust heat recovery device |
Country Status (4)
Country | Link |
---|---|
US (1) | US20090049832A1 (en) |
EP (1) | EP1852585B1 (en) |
JP (1) | JPWO2006090725A1 (en) |
WO (1) | WO2006090725A1 (en) |
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US20110232613A1 (en) * | 2010-01-27 | 2011-09-29 | Uwe Sailer | Motor Vehicle Having an Exhaust Gas System |
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FR3057611A1 (en) | 2016-10-19 | 2018-04-20 | Faurecia Systemes D'echappement | ACTUATOR FOR A VALVE OF A DEVICE FOR RECOVERING HEAT FROM EXHAUST, IN PARTICULAR FROM A MOTOR VEHICLE |
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US53771A (en) * | 1866-04-10 | Improved leather-splitting machine | ||
US3615848A (en) * | 1969-02-27 | 1971-10-26 | Isotopes Inc | Thermal control for fuel cell module |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63160315U (en) | 1987-04-09 | 1988-10-20 | ||
JPH0610147Y2 (en) * | 1987-06-12 | 1994-03-16 | 本田技研工業株式会社 | Exhaust pipe structure |
JPH04353256A (en) * | 1991-05-31 | 1992-12-08 | Suzuki Motor Corp | Evaporated fuel adsorbing equipment |
DE19725674A1 (en) * | 1997-06-18 | 1998-12-24 | Bayerische Motoren Werke Ag | Method for operating a heat exchanger in the exhaust gas stream of an internal combustion engine for motor vehicles |
DE10253469A1 (en) * | 2002-11-16 | 2004-05-27 | Daimlerchrysler Ag | Thermostatic valve for a combustion engine cooling system has electrically heated wax cartridge element to control valve operation |
JP4157752B2 (en) * | 2002-11-19 | 2008-10-01 | カルソニックカンセイ株式会社 | Engine exhaust heat recovery device |
JP2004211660A (en) * | 2003-01-08 | 2004-07-29 | Toyota Motor Corp | Exhaust system |
-
2006
- 2006-02-22 EP EP06714275A patent/EP1852585B1/en not_active Expired - Fee Related
- 2006-02-22 JP JP2007504740A patent/JPWO2006090725A1/en active Pending
- 2006-02-22 US US11/816,792 patent/US20090049832A1/en not_active Abandoned
- 2006-02-22 WO PCT/JP2006/303135 patent/WO2006090725A1/en active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US53771A (en) * | 1866-04-10 | Improved leather-splitting machine | ||
US3615848A (en) * | 1969-02-27 | 1971-10-26 | Isotopes Inc | Thermal control for fuel cell module |
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Also Published As
Publication number | Publication date |
---|---|
EP1852585A4 (en) | 2010-11-17 |
EP1852585B1 (en) | 2012-04-11 |
JPWO2006090725A1 (en) | 2008-07-24 |
EP1852585A1 (en) | 2007-11-07 |
WO2006090725A1 (en) | 2006-08-31 |
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Legal Events
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Owner name: SANGO CO., LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HASE, SHUICHI;REEL/FRAME:019761/0579 Effective date: 20070618 |
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STCB | Information on status: application discontinuation |
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