CN100497924C - Exhaust gas recirculation cooler - Google Patents
Exhaust gas recirculation cooler Download PDFInfo
- Publication number
- CN100497924C CN100497924C CNB038236990A CN03823699A CN100497924C CN 100497924 C CN100497924 C CN 100497924C CN B038236990 A CNB038236990 A CN B038236990A CN 03823699 A CN03823699 A CN 03823699A CN 100497924 C CN100497924 C CN 100497924C
- Authority
- CN
- China
- Prior art keywords
- pipe
- outer cover
- cooling water
- bypass
- 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.)
- Expired - Fee Related
Links
Images
Classifications
-
- 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
The invention provides an EGR cooler comprising tubes (3) and a shell (1) enclosing the tubes (3); cooling water (9) is supplied into and discharged from said shell (1); exhaust gas (10) is guided from a diesel engine into the tubes (3) for thermal exchange of the exhaust gas (10) with the cooling water (9). A bypass flow path for guiding the cooling water (9) is constituted within the shell (1) so as to prevent stagnation of the cooling water (9) in the shell (1).
Description
Technical field
The present invention relates to a kind of waste gas of recirculation diesel engine, be attached on exhaust gas recirculation (EGR) device of the generation that reduces nitrogen oxide, be used to cool off the cooler for recycled exhaust gas of recirculation with waste gas.
Background technique
As known technology in the past, the recirculation and reduce the EGR device of the generation of nitrogen oxide in motor of a part with the waste gas of motors such as automobile is arranged, but, in such EGR device, in the cooled engine during waste gas of recirculation, for temperature that can be by reducing this waste gas and its volume is diminished, under the situation that does not excessively reduce motor output, reduce the generation that combustion temperature also reduces nitrogen oxide effectively, in motor in the route of the EGR gas way, be provided with the cooler for recycled exhaust gas that is used for cooled exhaust air, this has been known technology, and for example 2001-No. 74380 communiques of TOHKEMY disclose.
Fig. 1 and Fig. 2 are the sectional views of above-mentioned cooler for recycled exhaust gas first example of expression, 1 expression is with the outer cover of cylindric formation among the figure, be fixed with the plate 2,2 that is used for closed cover 1 end face on these outer cover 1 axis direction two ends, on each plate 2,2, fixing the two ends of many pipes 3 with breakthrough status, these pipes 3 extend in the inside of outer cover 1 along axis direction.
And, an end at outer cover 1 is attached with cooling water inlet 4, is attached with coolant outlet 5 in 1 another end of outer cover, and cooling water 9 is 4 inside that supply to outer cover 1 from the cooling water inlet, in the flows outside of pipe 3, and be discharged to the outside of outer cover 1 from coolant outlet 5.
In addition, on the opposition side of the outer cover 1 of each plate 2,2, be fixed with lid 6 in the end face mode of surrounding above-mentioned each plate 2,2 with bowl-shape formation, central authorities at a lid 6 are provided with gas access 7, central authorities at another lid 6 are provided with gas outlet 8, the waste gas 10 of motor 7 enters a lid inside of 6 from the gas access, in by the process between the many pipes 3, after being cooled with heat exchange through the cooling water 9 of the flows outside of pipe 3, from the inside of another lid 6 discharge and from gas discharge outlet 8 to motor recirculation.In addition, x also represents the axes extending line of outer cover 1 among the figure of Fig. 1.
Yet, in the cooler for recycled exhaust gas of this first example, owing to exist following shortcoming, promptly, 4 cooling waters 9 that supply to outer cover 1 inside can not flow towards coolant outlet 5 equably with respect to the inner section of outer cover 1 from the cooling water inlet, so shown in pathway 11, in outer cover 1, with the bight of cooling water inlet 4 and coolant outlet 5 opposite sides near, because of cooling water 9 depositions can produce cooling water delay portion 12, like this, near cooling water delay portion 12,, bring the anxiety of thermal distortion because pipe 3 parts become high temperature.
Given this, constitute the second routine cooler for recycled exhaust gas, the second routine cooler for recycled exhaust gas is equipped with bypass pipe arrangement 14 as shown in Figure 3, and this bypass pipe arrangement 14 begins to extend in the outside of outer cover 1 to coolant outlet 5 from the position of relative cooling water inlet 4 face-offs on outer cover 1 diametric(al).Bypass pipe arrangement 14 is extracted the 4 a part of cooling waters 9 that import from the cooling water inlet out, eliminated cooling water 9 relative cooling water inlets 4 with the deposition of diametric(al) face-off position, can prevent the generation of cooling water delay portion 12, inhibition pipe 3 parts become high temperature.
Yet, the second so routine cooler for recycled exhaust gas, when bypass pipe arrangement 14 being set in outer cover 1 outside, owing to the peripheral equipment with outer cover 1 interferes, so, can bring the problem of the lift-launch of remarkable reduction on vehicle.
The present invention proposes in view of the above fact, and its objective is provides a kind of cooler for recycled exhaust gas, can prevent the generation of cooling water delay portion, simultaneously, can improve the lift-launch on vehicle.
On the other hand, cooler for recycled exhaust gas in the past also has the 3rd example, is known that for example TOHKEMY 2000-213424 communique.
Fig. 4 is the sectional view of the 3rd example of the above-mentioned cooler for recycled exhaust gas of expression, 31 expressions are with the outer cover of cylindric formation among the figure, be fixed with the plate 32,32 that is used for closed cover 31 end faces on the two ends of these outer cover 31 axis directions, many two ends with pipe 33 are fixed on each plate 32,32 with breakthrough status, and these pipes 33 extend in the inside of outer cover 31 with roughly bore along axis direction.
And, near an end of outer cover 31, cooling water inlet pipe 34 is installed from the outside, cooling water outlet pipe 35 is installed from the outside near another end of outer cover 31, cooling water 39 supplies to the inside of outer cover 31 from cooling water inlet pipe 34, in the flows outside of pipe 33, and be discharged to the outside of outer cover 31 from cooling water outlet pipe 35.
In addition, outer cover 31 opposition sides at each plate 32,32, be fixed with lid 36,36 in the end face mode of surrounding above-mentioned each plate 32,32 with bowl-shape formation, central authorities at a lid 36 are provided with exhaust gas entrance 37, central authorities at another lid 36 are provided with waste gas outlet 38, the waste gas 40 of motor 37 enters a lid inside of 36 from the gas access, in by the process between the many pipes 33, after being cooled, discharge from the inside of another lid 36 and from waste gas outlet 38 recirculation motor with heat exchange at the cooling water 39 of the flows outside of pipe 33.
In addition, 41 are illustrated in the set bypass outer pipe in position that the relative cooling water inlet 34 of outer cover 31 diametric(al)s stands facing each other among the figure, by extracting a part of cooling water 9 out, can not produce the deposition of cooling water 9 in position with cooling water inlet 34 face-offs from this bypass outer pipe 41.
In this structure, the arrangement of pipe 33 as shown in Figure 5, carry out side by side along outer circumferential side pipe 33 with respect to outer cover 31, simultaneously at the configuration center pipe 33a of the axes O place of outer cover 31, in this way, according to certain intervals (spacing), the axes O that is arranged in outer cover 31 is the concentric multiple circle-shaped of center with a plurality of pipes 33 of identical bore
Yet, cooler for recycled exhaust gas as the 3rd example, even is under the multiple circle-shaped situation of being spaced into of center with a plurality of pipes 33 according to the axes O with certain outer cover 31, because the high-temp waste gas 40 that flows from exhaust gas entrance 37 still has most tendency that flows through the pipe 33 of center side, so the pipe 33 of central side still has the worry that produces local thermal distortion than the pipe 33 temperature height of outer circumferential side, simultaneously, the problem of also having brought rate of heat exchange to worsen.
Therefore, the present invention proposes in view of the above fact, and its objective is provides a kind of cooler for recycled exhaust gas that can cool off the central side pipe effectively.
Summary of the invention
Cooler for recycled exhaust gas of the present invention has pipe, surround the outer cover of pipe, be installed in the cooling water inlet on the end of outer cover, and be installed in coolant outlet on another end of outer cover, the row's of giving cooling water and in pipe, import waste gas in the inside of outer cover from diesel engine, make waste gas and cooling water carry out heat exchange, constitute along the bypass flow path of the axis direction of outer cover in the inside of outer cover, the relative cooling water inlet of cooling water is guided towards the direction with the diametric(al) face-off, to eliminate the deposition of the cooling water that in outer cover, produces.This bypass flow path can be made of the bypass pipe arrangement, or constitutes by the formed outer cover of the radical inner space of reducing pipe, or the side face bending of outer cover is constituted.Can also be the internal configurations of the bypass outlet of bypass flow path towards coolant outlet.
According to such formation, owing to can pass through the bypass flow path guide cooling water, eliminate the deposition of the cooling water that is produced in the outer cover, so, the generation of cooling water delay portion can be prevented, the localized hyperthermiaization that can suppress pipe, simultaneously, owing to the inside that bypass flow path is arranged on outer cover, so, can not interfere, can improve the lift-launch on vehicle with the peripheral equipment of outer cover.In addition, when bypass flow path is made of the bypass pipe arrangement, because guide cooling water correctly, so, can prevent the generation of cooling water delay portion, suppress the localized hyperthermiaization of pipe really.Further, when constituting bypass flow path by means of the formed outer cover of the radical inner space of reducing pipe, owing to can form bypass flow path simply, so, be easy to prevent the generation of cooling water delay portion, suppress the localized hyperthermiaization of pipe really.Moreover, with the side face of outer cover is crooked when constituting bypass flow path, owing to can reduce interference with the outer cover peripheral equipment significantly with simple formation, so, be easy to improve the lift-launch on vehicle.In addition, with the outlet of the bypass of bypass flow path when the internal configurations of coolant outlet, because can be with the cooling water in the vacuum suction bypass flow path of coolant outlet, so, can be further guide cooling water correctly, prevent the generation of cooling water delay portion, suppress the localized hyperthermiaization of pipe more reliably.
Cooler for recycled exhaust gas of the present invention is a kind of outer cover that has pipe and surround this pipe, the row's of giving cooling water and in above-mentioned pipe, import waste gas in the inside of this outer cover from diesel engine, the cooler for recycled exhaust gas that makes this waste gas and above-mentioned cooling water carry out heat exchange, the axis that each pipe is arranged in outer cover is the concentric multiple circle-shaped of center, and, be arranged in circle-shaped pipe way and become the earth formation apart from circle-shaped position to the inside, circle-shaped position gradually from the outside.
According to this formation, owing to make and be arranged in circle-shaped pipe way and become the earth gradually apart from circle-shaped position to the inside, circle-shaped position and form from the outside, so with cooling water during to the outer cover internal feed, cooling water flows around the pipe of center side mostly, can cool off the pipe of center side effectively, as a result, even high-temp waste gas has most tendency that flows through the center side pipe, also can prevent the thermal distortion that it is local, simultaneously, can improve rate of heat exchange.
Cooler for recycled exhaust gas of the present invention is a kind of outer cover that has pipe and surround this pipe, the row's of giving cooling water and in above-mentioned pipe, import waste gas in the inside of this outer cover from diesel engine, the cooler for recycled exhaust gas that makes this waste gas and above-mentioned cooling water carry out heat exchange, the axis that each pipe is arranged in outer cover is the concentric multiple circle-shaped of center, and the circumference spacing of multiple configuration becomes the earth formation from the radial outside of outer cover gradually to the center.
According to this formation, because making the circumference spacing of multiple configuration become big mode with the radial outside from outer cover gradually to the center forms, so with cooling water during to the outer cover internal feed, cooling water flows around the pipe of center side mostly, can cool off the pipe of center side effectively, as a result, even high-temp waste gas has most tendency that flows through the center side pipe, also can prevent the thermal distortion that it is local, simultaneously, can improve rate of heat exchange.
Cooler for recycled exhaust gas of the present invention is a kind of outer cover that has pipe and surround this pipe, the row's of giving cooling water and in above-mentioned pipe, import waste gas in the inside of this outer cover from diesel engine, the cooler for recycled exhaust gas that makes this waste gas and above-mentioned cooling water carry out heat exchange, the axis that each pipe is arranged in outer cover is the concentric multiple circle-shaped of center, and, become the earth formation gradually apart from circle-shaped position to the inside, circle-shaped position with being arranged in circle-shaped pipe way from the outside, simultaneously, the circumference spacing of multiple configuration becomes the earth formation from the radial outside of outer cover gradually to the center.
According to this formation, because making the center side pipe way become the earth gradually apart from the circle-shaped position to the inside, circle-shaped position from the outside forms, simultaneously, the circumference spacing is become the earth from the radial outside of outer cover gradually to the center to be formed, so, with cooling water during to the outer cover internal feed, cooling water flows around the pipe of center side mostly, can cool off the pipe of center side effectively, the result, even high-temp waste gas has most tendency that flows through the center side pipe, also can prevent the thermal distortion that it is local, further improve rate of heat exchange.
Further, preferably, at the axle center of outer cover configuration center pipe, and to make the circumference spacing of the most inboard circle-shaped position and center pipe be to form maximumly.According to this formation, because corresponding to the center pipe of exhaust-gas flow, the circumference spacing of center side is formed to be maximum mode, so, with cooling water during to the outer cover internal feed, the big multithread of cooling water is flowed around the pipe at center, can cool off the pipe at center, result effectively, even high-temp waste gas has the tendency that flows through the center pipe mostly, also can be reliably and prevent from an easy rate the thermal distortion that it is local from simultaneously, to can further improve rate of heat exchange.
Description of drawings
Fig. 1 represents the sectional side view of cooler for recycled exhaust gas first example in the past.
Fig. 2 is that the II-II of Fig. 1 is to looking sectional view.
Fig. 3 represents the sectional side view of cooler for recycled exhaust gas second example in the past.
Fig. 4 represents the sectional side view of cooler for recycled exhaust gas the 3rd example in the past.
Fig. 5 be Fig. 4 the V-V direction to view.
Fig. 6 is the sectional side view that first example of form of the present invention is implemented in expression.
Fig. 7 is that the VII-VII of Fig. 6 is to looking sectional view.
Fig. 8 is the sectional side view that second example of form of the present invention is implemented in expression.
Fig. 9 is the sectional side view that the 3rd example of form of the present invention is implemented in expression.
Figure 10 is the sectional side view that the 4th example of form of the present invention is implemented in expression.
Figure 11 is the sectional view that the 5th example of form of the present invention is implemented in expression.
Figure 12 is the sectional view that the 6th example of form of the present invention is implemented in expression.
Figure 13 is the broad cross-section map that the 7th example of form of the present invention is implemented in expression.
Figure 14 is the broad cross-section map that the 8th example of form of the present invention is implemented in expression.
Figure 15 is the broad cross-section map that the 9th example of form of the present invention is implemented in expression.
Embodiment
Below, based on description of drawings form of implementation of the present invention.
Fig. 6, Fig. 7 show first example of form of implementation of the present invention, and the part identical with Fig. 1～Fig. 3 indicates same symbol.
The cooler for recycled exhaust gas of first example, reduced the radical of the pipe 3 that is configured in outer cover 1 inside, upside in outer cover 1 inside, form the given inner space 15 that inner side surface 1a, plate 2,2 and pipe 3 by outer cover 1 surround, in order to form the bypass flow path of cooling water 9 in given inner space 15, the bypass pipe arrangement 16 that will be made up of a pipe arrangement is fixed on the inner side surface 1a of outer cover 1 with other fixation methods such as welding, solderings along the axis direction of outer cover 1.
Below, the effect of first example of the form of implementing cooler for recycled exhaust gas of the present invention is described.
In order to obtain the heat exchange with waste gas 10, cooling water 94 is supplied to outer cover 1 when inner from the cooling water inlet, cooling water 9 is 4 inside that flow to outer cover 1 from the cooling water inlet, carry out heat exchange by pipe 3 and waste gas 10, discharge from coolant outlet 5, simultaneously, cooling water 9 is attracted in the bypass pipe arrangement 16 by means of the negative pressure of coolant outlet 5, thus, flow towards the direction with the face-off of diametric(al) ground in the relative cooling water inlet 4 of the part of cooling water 9.
Like this,,, eliminated the deposition of the cooling water 9 that produces in the outer cover 1, therefore, can prevent the generation of cooling water delay portion owing to, cooling water 9 relative cooling water inlets 4 are guided towards the direction with the face-off of diametric(al) ground by bypass flow path according to first example.In addition,, bypass flow path is formed in the inside of outer cover 1,, can improves the lift-launch on vehicle so there is not the interference with outer cover 1 peripheral equipment in order to have got rid of the parts that are present in outer cover 1 periphery.
When bypass flow path is made of bypass pipe arrangement 16, because therefore guide cooling water 9 relevantly can prevent the generation of cooling water delay portion reliably.In addition, when the bypass flow path with bypass flow path exports 16d towards coolant outlet 5 internal configurations, owing to can use the interior cooling water 9 of vacuum suction bypass flow path of coolant outlet 5, so, can be further guide cooling water 9 definitely, prevent the generation of cooling water delay portion more reliably.Moreover the stream cross-sectional area of bypass pipe arrangement 16 is 5 of cooling water Total Water～15% o'clock, can carry out better balance to the elimination and the heat exchange efficiency of cooling water delay portion.Under the stream cross-sectional area of bypass pipe arrangement 16 5% situation, can not eliminate cooling water delay portion well here, less than the cooling water total amount.On the other hand, under the stream cross-sectional area of bypass pipe arrangement 16 15% situation greater than the cooling water total amount, heat exchange efficiency can reduce, and can not well be used.
Fig. 8 represents to implement second example of form of the present invention, and Fig. 9 represents to implement the 3rd example of form of the present invention, and the part identical with Fig. 1～Fig. 3 indicates same symbol.
The cooler for recycled exhaust gas of second example has reduced the radical of the pipe 3 that is configured in outer cover 1 inside, upside in outer cover 1 inside, be formed with the given inner space 15 that inner side surface 1a, plate 2,2 and pipe 3 by outer cover 1 surround, in order in given inner space 15, to form the bypass flow path of cooling water 9, other fixation methods such as the bypass parts 17 usefulness welding of bending, soldering are fixed on the inner side surface 1a of outer cover 1, constitute bypass pipe arrangement 19 along outer cover 1 axis direction.In this structure, the bypass parts 17 of second example, when forming with the groove shape, make the shape that the vertical section shape has V word section 17a, and the end forms the fixing part 17b of the welding that connects to the inner side surface 1a of outer cover 1, soldering etc. up along the axial direction of outer cover 1.
On the other hand, the cooler for recycled exhaust gas of the 3rd example is identical substantially with second example, reduce the radical of the pipe that is configured in outer cover 1 inside, upside in outer cover 1 inside, be formed with the given inner space 15 that inner side surface 1a, plate 2,2 and pipe 3 by outer cover 1 surround, in order in given inner space 15, to form the bypass flow path of cooling water 9, other fixation methods such as the bypass parts 18 usefulness welding of bending, soldering are fixed on the inner side surface 1a of outer cover 1, constitute bypass pipe arrangement 20 along outer cover 1 axial direction.In this structure, the bypass parts 18 of the 3rd example, when forming the groove shape along the axial direction of outer cover 1, make the vertical section shape and have the shape of bottom surface 18a and bi-side 18b, the upper end in bi-side forms the fixing part 18c of the welding that connects, soldering etc. on the inner side surface 1a of outer cover 1.
In addition, the bypass pipe arrangement 19,20 of second example and the 3rd example is identical substantially with first example, upwards form the bypass inlet in outer cover 1 footpath with respect to the position of cooling water inlet 4 face-offs, simultaneously, begin to extend to the inside of coolant outlet 5 from bypass body, form the bypass outlet in the half-way of coolant outlet 5 by curved part along the axis direction of outer cover 1.Here, the stream cross-sectional area of bypass pipe arrangement 19,20 and first example are same, and preferably resolve according to fluid and real machine test etc. got 5～15% of cooling water Total Water.
Below, second example of the form of implementing cooler for recycled exhaust gas of the present invention and the effect of the 3rd example are described.
Like this, according to second example and the 3rd example, owing to reduced the parts amount that forms bypass pipe arrangement 19,20, so, can form bypass pipe arrangement 19,20 with low cost.In addition, can obtain the action effect identical substantially according to second example and the 3rd example with first example.
Figure 10 represents to implement the 4th example of form of the present invention, and the part identical with Fig. 1～Fig. 3 indicates same symbol.
The cooler for recycled exhaust gas of the 4th example has reduced the radical of the pipe 3 that is configured in outer cover 1 inside, upside in outer cover 1 inside, the given inner space 15 that inner side surface 1a, plate 2,2 and the pipe 3 of formation by outer cover 1 surrounded is with the bypass flow path of given inner space 15 as cooling water 9.Here, the stream cross-sectional area of bypass pipe arrangement and first example are same, and preferably resolve according to fluid and real machine test etc. got 5～15% of cooling water Total Water.
Below, the effect of the 4th example of the form of implementing cooler for recycled exhaust gas of the present invention is described.
Shown in the 4th example, when the inner space 15 of the formed outer cover 1 of radical by reducing pipe 3 constitutes bypass flow path, owing to can form bypass flow path simply, so, can prevent the generation of cooling water delay portion at an easy rate, suppress the high temperatureization of pipe 3 parts reliably.In addition, owing to do not need to form the parts amount of bypass flow path, so, can form bypass flow path with lower cost.And then, according to the 4th example, can obtain and same effect and the effect of first example.
Figure 11 represents to implement the 5th example of form of the present invention, and Figure 12 represents to implement the 6th example of form of the present invention, and the part identical with Fig. 1～Fig. 3 indicates same symbol respectively.
The cooler for recycled exhaust gas of the 5th example, by crooked upward along outer cover 1 axis direction the side face 1b of outer cover 1 upside, widened the inner space 15 of outer cover 1, simultaneously, reduce the radical of the pipe 3 that is configured in outer cover 1 inside, upside in outer cover 1 inside forms the given inner space 15 that inner side surface 1a, plate 2,2 and pipe 3 by outer cover 1 are surrounded, and given inner space 15 constitutes as the bypass flow path of cooling water 9.Here, the cross-sectional area of bypass flow path and first example are same, and preferably resolve according to fluid and real machine test etc. got 5～15% of cooling water Total Water.
On the other hand, the cooler for recycled exhaust gas of the 6th example, in order to be formed with bypass flow path in the given inner space 15 that forms in the 5th example, other fixation methods such as bypass parts 21 usefulness the welding of bending, soldering are fixed on the inner side surface 1a of outer cover 1, along outer cover 1 axis direction formation bypass pipe arrangement 22.In this structure, the bypass parts 21 of the 6th example are identical substantially with the bypass parts of second example 17, when forming the groove shape along the axial direction of outer cover 1, making the vertical section shape has the shape of V word section 21a, and the end forms the fixing part 21b of the welding that connects to the inner side surface 1a of outer cover 1, soldering etc. up.In addition, the bypass pipe arrangement 22 of the 6th example is identical substantially with first example, make progress in the outer cover 1 footpath position of relative cooling water inlet 4 face-offs forms the bypass inlet, simultaneously, begin to extend to the inside of coolant outlet 5 from bypass body, form the bypass outlet in the half-way of coolant outlet 5 by curved part along the axis direction of outer cover 1.Here, the stream cross-sectional area of bypass pipe arrangement 22 and first example are same, and preferably resolve according to fluid and real machine test etc. got 5～15% of cooling water Total Water.
Below, the 5th example of the form of implementing cooler for recycled exhaust gas of the present invention and the effect of the 6th example are described.
Like this, shown in the 5th example and the 6th example,,, reduced the interference with outer cover 1 peripheral equipment significantly, be easy to improve the lift-launch on vehicle by simple formation with the side face 1b of outer cover 1 is crooked when constituting bypass flow path.And,, can obtain effect and the effect identical substantially with first example according to the 5th example and the 6th example.
In addition, cooler for recycled exhaust gas of the present invention not only is defined in the example of above-mentioned form, the number of tubes that is reduced can be any number, also there is no particular limitation for the shape of bypass flow path, so long as it is just passable to have given stream section performance, certainly, without departing from the spirit and scope of the present invention, can make other various changes.
Figure 13 represents to implement the 7th example of form of the present invention.
In the 7th example of this form, the arrangement of pipe 33 forms, carry out side by side along outer circumferential side pipe 33 with respect to outer cover 31, simultaneously at the configuration center pipe 33a of the axes O place of outer cover 31, in this way, the axes O that a plurality of pipes 33 of identical bore are arranged in outer cover 31 is the concentric multiple circle-shaped of center, and, make spacing a, the b, the c that are arranged between the circle-shaped pipe become big gradually from the circle-shaped position to the inside, circle-shaped position in the outside.
Here, specify around the pipe 33a of center with the situation of many pipes of triple circle-shaped arrangements 33, as shown in figure 13, in the outside with first pipe way of circle-shaped arrangement apart from a, from the outside be second and with second pipe way of circle-shaped arrangement apart from b and from outside number be the 3rd and with circle-shaped arrangement the 3rd pipe way apart from c, form with first pipe way apart from a, second pipe way apart from b, the 3rd pipe way is apart from the big form of becoming in turn of c (a＜b＜c).In addition, so-called pipe way in the many pipes 33 with circle-shaped arrangement, is meant the distance between the adjacent pipe axle center apart from a, b, c.
According to the 7th example, because will be arranged in circle-shaped pipe way makes from circle-shaped to the inside position, outer circumference shape position apart from a, b, c and becomes big form gradually, so, with cooling water when the internal feed of outer cover 31, cooling water can flow to mostly center side pipe 33,33a around, can cool off pipe 33, the 33a of center side effectively, the result, even high-temp waste gas has most pipe 33 through center side, the mobile tendency of 33a, also can prevent local thermal distortion, simultaneously, improve heat exchange efficiency.
Figure 14 represents to implement the 8th example of form of the present invention.
In the 8th example of this form, the arrangement mode of pipe 33 is, relative outer cover 31, when carrying out side by side along the pipe 33 of outer circumferential side, configuration center pipe 33a on the axes O of pipe 31, in this way, the axes O that a plurality of pipes 33 of identical bore are arranged in outer cover 31 is the concentric multiple circle-shaped of center, and the circumference spacing a ' of multiple configuration, b ', c ' become big mode with the radial outside from outer cover 31 gradually to the center and form.
Here, specify a plurality of pipes 33 with triple circle-shaped situations on every side that are arranged in center pipe 33a, as shown in figure 14, the first circumference spacing a ' that forms between the circle-shaped position of the circle-shaped position of outside tube 33 and second pipe 33 that begins from the outside, the 3rd circumference spacing c ' that forms between the circle-shaped position of second circumference spacing b ' that forms between the circle-shaped position of the circle-shaped position of No. second pipe 33 that begins from the outside and the 3rd pipe 33 that begins from the outside and the 3rd pipe 33 that begins from the outside and the center pipe 33a forms in the following manner, be the circumference spacing since the first circumference spacing a ', become greatly (a '＜b '＜c ') through the second circumference spacing b ' in turn to the 3rd circumference spacing c '.In addition, so-called pipe way is meant distance towards between the adjacent pipe axle center of the radial direction of outer cover 31 apart from a ', b ', c '.
According to the 8th example, owing to become circumference spacing a ', b ', the c ' that the earth forms multiple configuration gradually to the center from the radial outside of outer cover 31, so, with cooling water when the internal feed of outer cover 31, cooling water mostly can flow around the pipe 33 of center side, 33a, can cool off pipe 33, the 33a of center side effectively, the result, even high-temp waste gas has the pipe 33 through center side, the tendency that 33a flows mostly, also can prevent local thermal distortion, simultaneously, improve heat exchange efficiency.
In addition, at the axle center of outer cover 31 configuration center pipe 33a, and, the circumference spacing c ' that the most inboard circumference position shape is put with center pipe 33a forms maximum, at this moment, pipe 33a with respect to the center of exhaust-gas flow, the circumference spacing c ' maximum of center side, so, with cooling water when the internal feed of outer cover 31, cooling water mostly can be through flowing around the pipe 33a of center, can cool off center pipe 33a effectively, the result is even high-temp waste gas has the tendency that flows through center pipe 33a mostly, also can prevent local thermal distortion reliably, and can further improve heat exchange efficiency.
Figure 15 represents to implement the 9th example of form of the present invention.
In the 9th example of this form, the arrangement mode of pipe 33 is, relative outer cover 31, pipe 33 along outer circumferential side carries out side by side, simultaneously at the configuration center pipe 33a of the axes O place of outer cover 31, in this way, the axes O that a plurality of pipes 33 of identical bore are arranged in outer cover 31 is the concentric multiple circle-shaped of center, and, make the spacing a that is arranged between the circle-shaped pipe, b, c becomes the earth formation gradually from the circle-shaped position to the inside, circle-shaped position in the outside, and, the circumference spacing a ' of multiple configuration, b ', c ' becomes big mode with the radial outside from outer cover 31 gradually to the center and forms.
Here, specify a plurality of pipes 33 with triple circle-shaped situations on every side that are arranged in center pipe 33a, as shown in figure 15, in the outside with first pipe way of circle-shaped arrangement apart from a, from the outside be second and with second pipe way of circle-shaped arrangement apart from b and from outside number be the 3rd and with circle-shaped arrangement the 3rd pipe way apart from c, the form that form from first pipe way apart from a, second pipe way becoming in turn apart from b to the three pipe ways apart from c is big (a＜b＜c).In addition, the first circumference spacing a ' that forms between the circle-shaped position of the circle-shaped position of outside tube 33 and second pipe 33 that begins from the outside, the 3rd circumference spacing c ' that forms between the circle-shaped position of second circumference spacing b ' that forms between the circle-shaped position of the circle-shaped position of No. second pipe 33 that begins from the outside and the 3rd pipe 33 that begins from the outside and the 3rd pipe 33 that begins from the outside and the center pipe 33a forms in the following manner, be the circumference spacing since the first circumference spacing a ', become greatly (a '＜b '＜c ') through the second circumference spacing b ' in turn to the 3rd circumference spacing c '.In addition, so-called pipe way is apart from a, b, c, and is roughly the same with first example, in the many pipes 33 with circle-shaped arrangement, be meant the distance between the adjacent pipe axle center, so-called pipe way is meant distance towards between the adjacent pipe axle center of the radial direction of outer cover 31 apart from a ', b ', c '.
According to the 9th example, since with the pipe way of center side apart from a, b, c becomes the earth formation gradually from the circle-shaped position to the inside, circle-shaped position in the outside, simultaneously, circumference spacing a ', b ', c ' becomes the earth formation from the radial outside of outer cover 31 gradually to the center, therefore, with cooling water when the internal feed of outer cover 31, cooling water can flow around the pipe 33a of center mostly, can cool off center pipe 33a effectively, as a result, even high-temp waste gas has the tendency that flows through center pipe 33a mostly, also can prevent local thermal distortion, simultaneously, further improve heat exchange efficiency.
In addition, at the axle center of outer cover 31 configuration center pipe 33a, and, allow the circumference spacing c ' of the most inboard circle-shaped position and center pipe 33a when forming maximumly, identical substantially with second example, correspondingly increase the circumference spacing c ' of center side with the center pipe 33a of exhaust-gas flow, so, with cooling water when the internal feed of outer cover 31, cooling water mostly can be at the pipe 33 of center side, flow around the 33a, can cool off the pipe 33 of center side effectively, 33a, as a result, even high-temp waste gas has mostly through center side pipe 33, the tendency that 33a flows also is easy to and avoids very reliably local thermal distortion, simultaneously, further improve heat exchange efficiency.
In addition, cooler for recycled exhaust gas of the present invention is not limited to the example of above-mentioned form, and being arranged in multiple circle-shaped pipe can be triple above numbers, be arranged in double also passable, moreover, self-evident, without departing from the spirit and scope of the present invention, can make various changes.
The possibility of utilizing on the industry
In sum, cooler for recycled exhaust gas of the present invention, making of Diesel engine is useless as being added on On the EGR device of the generation of gas recirculation and reduction nitrogen oxide and for the cooling EGR gas Cooler use, can prevent the generation of cooling water delay section, be suitable for improving taking on the vehicle Carrying property. In addition, also be suitable for effectively cooling off the pipe of central side.
Claims (2)
1, a kind of cooler for recycled exhaust gas, have pipe (3), surround the outer cover (1) of this pipe (3), be installed in the cooling water inlet (4) on the end of described outer cover (1), and be installed in coolant outlet (5) on another end of described outer cover (1), give row cooling water (9) in the inside of this outer cover (1), and in described pipe (3), import waste gas (10) from diesel engine, make this waste gas (10) and described cooling water (9) carry out heat exchange, it is characterized in that, constitute along the bypass flow path of the axis direction of this outer cover (1) in the inside of described outer cover (1), cooling water (9) is guided towards the direction with the diametric(al) face-off cooling water inlet (4) relatively, to eliminate the deposition of the cooling water (9) that produces in described outer cover (1), described bypass flow path is made of bypass pipe arrangement (16).
According to the cooler for recycled exhaust gas of claim 1 record, it is characterized in that 2, the bypass outlet (16d) of bypass flow path is towards the internal configurations of coolant outlet (5).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002289833A JP2004124808A (en) | 2002-10-02 | 2002-10-02 | Exhaust gas recirculation cooler |
| JP289834/2002 | 2002-10-02 | ||
| JP289833/2002 | 2002-10-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1688804A CN1688804A (en) | 2005-10-26 |
| CN100497924C true CN100497924C (en) | 2009-06-10 |
Family
ID=32281887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB038236990A Expired - Fee Related CN100497924C (en) | 2002-10-02 | 2003-05-22 | Exhaust gas recirculation cooler |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2004124808A (en) |
| CN (1) | CN100497924C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4418358B2 (en) | 2004-12-14 | 2010-02-17 | 本田技研工業株式会社 | Heat exchanger |
| JP4775287B2 (en) * | 2006-10-18 | 2011-09-21 | 株式会社デンソー | Heat exchanger |
| CN101843317B (en) * | 2009-03-27 | 2013-09-25 | 何信国 | Deodorization method and device thereof for fish meal production |
| JP5585558B2 (en) * | 2011-09-24 | 2014-09-10 | 株式会社デンソー | Exhaust heat exchanger |
| FR3013823B1 (en) | 2013-11-28 | 2018-09-21 | F2A - Fabrication Aeraulique Et Acoustique | DOUBLE FLOW AIR / AIR EXCHANGER, AIR TREATMENT PLANT AND METHOD FOR CLEANING SUCH EXCHANGER |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2167345Y (en) * | 1993-09-01 | 1994-06-01 | 李文清 | Tubular type heat-exchange apparatus |
| CN2196773Y (en) * | 1994-01-20 | 1995-05-10 | 郎逵 | Multiple-effect heat exchanger |
-
2002
- 2002-10-02 JP JP2002289833A patent/JP2004124808A/en active Pending
-
2003
- 2003-05-22 CN CNB038236990A patent/CN100497924C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2167345Y (en) * | 1993-09-01 | 1994-06-01 | 李文清 | Tubular type heat-exchange apparatus |
| CN2196773Y (en) * | 1994-01-20 | 1995-05-10 | 郎逵 | Multiple-effect heat exchanger |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1688804A (en) | 2005-10-26 |
| JP2004124808A (en) | 2004-04-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8079410B2 (en) | Exhaust gas recirculation cooler and method | |
| EP1548267B1 (en) | Egr cooler | |
| EP1647697A1 (en) | Egr cooler | |
| US7774937B2 (en) | Heat exchanger with divided coolant chamber | |
| EP1683956A1 (en) | Egr cooler | |
| JP4659511B2 (en) | EGR cooler device | |
| US6976530B2 (en) | Exhaust heat exchanger | |
| CN100497924C (en) | Exhaust gas recirculation cooler | |
| JP3719578B2 (en) | Exhaust cooler structure | |
| JPH1113551A (en) | Egr cooler | |
| JP2001027158A (en) | Egr gas cooling system | |
| JP2010112355A (en) | Egr cooler | |
| JP4248095B2 (en) | EGR cooler | |
| CN108317018A (en) | Cylinder head cooling device and preparation method thereof and cylinder cover cooling system | |
| JP4199511B2 (en) | EGR cooler | |
| US20050103484A1 (en) | Heat exchanger | |
| CN111148961B (en) | Exhaust gas heat exchanger | |
| US10731608B2 (en) | Exhaust heat recovery device | |
| JP2006329123A (en) | Air conditioner element for egr gas air conditioner for internal combustion engine | |
| JP2004116495A (en) | Egr gas cooling system | |
| CN220319674U (en) | Engine and automobile | |
| CN114320522B (en) | Cooling device for engine and engine | |
| WO2021148829A1 (en) | Cooling system for vehicle | |
| CN216157790U (en) | EGR cooler and engine with same | |
| JP4035479B2 (en) | EGR cooler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090610 Termination date: 20200522 |