CN103912411B - The exhaust gas recirculation device of mobile engine - Google Patents
The exhaust gas recirculation device of mobile engine Download PDFInfo
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- CN103912411B CN103912411B CN201310495897.5A CN201310495897A CN103912411B CN 103912411 B CN103912411 B CN 103912411B CN 201310495897 A CN201310495897 A CN 201310495897A CN 103912411 B CN103912411 B CN 103912411B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M26/00—Engine-pertinent apparatus for adding exhaust gases to combustion-air, main fuel or fuel-air mixture, e.g. by exhaust gas recirculation [EGR] systems
- F02M26/13—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories
- F02M26/14—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system
- F02M26/15—Arrangement or layout of EGR passages, e.g. in relation to specific engine parts or for incorporation of accessories in relation to the exhaust system in relation to engine exhaust purifying apparatus
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust-Gas Circulating Devices (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Exhaust Silencers (AREA)
Abstract
There is provided the condensed water sputtering of generation in the exhaust gas recirculation path that can suppress in cylinder head to the exhaust gas recirculation device of the mobile engine in exhaust manifold.Exhaust gas recirculation path (13) possesses upstream side passage portion (14) and downstream passage portion (15).Cooling water cooling in the cooled intake section (12) of downstream passage portion (15).By prominent towards ceiling face (23) from the bottom surface (22) of upstream side passage portion (14) and relative to ceiling face (23), there is the prominent wall (21) in gap and be formed at exhaust outlet (7) side end of upstream side passage portion (14).It addition, make the upper end kernel of section (O) higher than exhaust outlet (7) of prominent wall (21).It addition, make the upper end of prominent wall (21) higher than upstream side passage portion (14) and the upper end of the connector (20) of downstream passage portion (15).
Description
Technical field
The present invention relates to the exhaust gas recirculation device of mobile engine used in vehicle, be suitable for the part of the waste gas by flowing through exhaust outlet and be back to the exhaust gas recirculation path of air inlet or inlet manifold and be formed at the situation of cylinder head.
Background technology
As the exhaust gas recirculation device of the mobile engine that like this exhaust gas recirculation path is formed at cylinder head, there is the device such as described in JP 2011-43096.In the exhaust gas recirculation device of this mobile engine, at the one side of the cylinder head being equipped with exhaust manifold, bank of cylinder direction, i.e. crankshaft direction will be formed at exhaust outlet continuous print groove.The part of the side contrary with exhaust outlet of this groove is connected with towards the exhaust gas recirculation passage downstream portion being equipped with the another side of cylinder head of inlet manifold and be formed in this cylinder head.Further, exhaust gas recirculation circuit upstream portion is constituted by covering groove with the cover plate being wholely set with exhaust manifold.Now, by making the part deformation covering groove of cover plate form swells with the one side away from cylinder head, exhaust gas recirculation circuit upstream portion it is made up of this swells and groove.
As the exhaust gas recirculation device of the mobile engine described in JP 2011-43096, the situation being because utilizing the waste gas in exhaust gas recirculation path of the cooling water cool flow in the cooling water path in cylinder head in exhaust gas recirculation path is formed at cylinder head is more.In the exhaust gas recirculation device of the mobile engine described in JP 2011-43096, there is cooling water path near exhaust gas recirculation passage downstream portion in being formed at cylinder head, flow through the cooling water cooling that the waste gas in exhaust gas recirculation passage downstream portion is cooled in water passage.On the other hand, in the exhaust gas recirculation device of the mobile engine described in JP 2011-43096, the height in the exhaust gas recirculation circuit upstream portion being made up of groove and swells is the highest further away from exhaust outlet, the lowest the closer to exhaust side.During the cooling water cooling that the waste gas in exhaust gas recirculation passage downstream portion is cooled in water passage as mentioned above, there is the possibility of the condensed water after producing waste gas condensation in exhaust gas recirculation passage downstream portion.Now, when the exhaust side in exhaust gas recirculation circuit upstream portion is relatively low, the condensed water produced in exhaust gas recirculation passage downstream portion is prone to flow into exhaust side from exhaust gas recirculation circuit upstream portion.Such as, in the case of driver at a heat bend the throttle, the flow velocity of the waste gas flowing to exhaust outlet from cylinder is increased sharply, and the condensed water in exhaust gas recirculation circuit upstream portion is introduced into exhaust outlet due to the negative pressure that is accompanied by this.Then, the condensed water introducing exhaust outlet flows to exhaust manifold due to the flow velocity of waste gas, and further towards being configured at the Abgassensor of exhaust manifold, Abgassensor condensation by contact water, Abgassensor likely soaks and ruptures or performance reduces.
Summary of the invention
The present invention is conceived to the problems referred to above point and makes, the exhaust gas recirculation device of the mobile engine in the condensed water sputtering produced in its object is to provide the exhaust gas recirculation path that can suppress in cylinder head to exhaust manifold.
In order to solve the problems referred to above, the embodiment of invention is the exhaust gas recirculation device of the mobile engine with multiple cylinder, comprise: inlet manifold, the one end in its direction intersected with above-mentioned bank of cylinder being assemblied in cylinder head, be connected with the air inlet of above-mentioned each cylinder；Exhaust manifold, the other end in its direction intersected with above-mentioned bank of cylinder being assemblied in above-mentioned cylinder head, it is connected with the exhaust outlet of above-mentioned each cylinder；Abgassensor, it is assemblied in above-mentioned exhaust manifold, the waste gas that detection is discharged from above-mentioned exhaust outlet；And exhaust gas recirculation path, it is formed at above-mentioned cylinder head, a part for the waste gas flowing through above-mentioned exhaust outlet is back to above-mentioned air inlet or above-mentioned inlet manifold, above-mentioned exhaust gas recirculation path includes: upstream side passage portion, it is formed towards above-mentioned bank of cylinder direction from above-mentioned exhaust outlet in the side, the other end in the direction intersected with above-mentioned bank of cylinder of above-mentioned cylinder head, and the bottom surface of above-mentioned upstream side passage portion is along with the step-down away from above-mentioned exhaust side；And downstream passage portion, it is connected with above-mentioned upstream side passage portion, towards the direction formation intersected with above-mentioned bank of cylinder, the cooling water cooling being formed in the cooling water path of above-mentioned cylinder head, in above-mentioned upstream side passage portion, there is prominent wall, it is formed at the above-mentioned exhaust-port-side of above-mentioned upstream side passage portion, highlights towards ceiling face from above-mentioned bottom surface and has gap set in advance relative to above-mentioned ceiling mask.
It addition, the upper end of above-mentioned prominent wall to be set in the position of the kernel of section of the above-mentioned exhaust outlet connected higher than above-mentioned upstream side passage portion.
It addition, the upper end of above-mentioned prominent wall is set in higher than above-mentioned upstream side passage portion and the position of the upper end of the connector of above-mentioned downstream passage portion.
It addition, the sectional area of above-mentioned upstream side passage portion is the biggest further away from above-mentioned prominent wall.
Additionally, above-mentioned prominent wall be the 1st highlight wall in the case of, the above-mentioned 1st of above-mentioned upstream side passage portion highlight formed between wall and above-mentioned connector from above-mentioned ceiling prominent facing to above-mentioned bottom surface the 2nd highlight wall, above-mentioned 2nd bottom highlighting wall is set below the position of the above-mentioned 1st upper end highlighting wall.
It addition, make the above-mentioned 1st face highlighting the side contrary with above-mentioned exhaust outlet of either one that wall and the above-mentioned 2nd highlights wall cave in and form concave curved surface.
It addition, form, between above-mentioned prominent wall and above-mentioned connector, the groove caved in downwards in the above-mentioned bottom surface of above-mentioned upstream side passage portion.
Therefore, according to the embodiment of invention, in the case of mobile engine has multiple cylinder, the one end in the direction intersected with bank of cylinder that the inlet manifold being connected with the air inlet of each cylinder is assemblied in cylinder head.It addition, the other end in the direction intersected with bank of cylinder that the exhaust manifold being connected with the exhaust outlet of each cylinder is assemblied in cylinder head.The Abgassensor of waste gas detection discharged from exhaust outlet is assemblied in exhaust manifold.Further, the exhaust gas recirculation path part flowing through the waste gas of exhaust outlet being back to air inlet or inlet manifold is formed at cylinder head.This exhaust gas recirculation path possesses: upstream side passage portion, and it is formed towards bank of cylinder direction from exhaust outlet in the side, the other end in the direction intersected with bank of cylinder of cylinder head, and the bottom surface of above-mentioned upstream side passage portion is along with the step-down away from exhaust side；And downstream passage portion, it is connected with upstream side passage portion, towards the direction formation intersected with above-mentioned bank of cylinder, the cooling water cooling in cooled water passage.Further, will highlight towards ceiling face from the bottom surface of upstream side passage portion and have the prominent wall in gap set in advance to be formed at the exhaust-port-side of upstream side passage portion relative to ceiling mask.Therefore, the condensed water of the waste gas produced in exhaust gas recirculation path is difficult in flow to exhaust side in upstream side passage portion.Even if it addition, condensed water flows to exhaust side in upstream side passage portion, prominent wall suppression condensed water also can be utilized to be introduced in exhaust outlet, accordingly, it is capable to suppression condensed moisture is scattered in exhaust manifold.Further, as a result of which it is, the Abgassensor being assemblied in exhaust manifold can be protected.
It addition, the upper end of prominent wall to be set in the position of the kernel of section of the exhaust outlet connected higher than upstream side passage portion.Thus, even if condensed water is introduced in exhaust outlet due to the flowing of waste gas, condensed water also can be made to be attached to the ceiling face of exhaust outlet.Thus, the main flow of condensed water waste gas in exhaust outlet can be made to stagger, the condensation water quantity of the flowing taking waste gas can be reduced.Accordingly, it is capable to suppression condensed water sputtering is in exhaust manifold, as a result of which it is, the Abgassensor being assemblied in exhaust manifold can be protected.
It addition, the upper end of prominent wall is set in higher than upstream side passage portion and the position of the upper end of the connector of downstream passage portion.Thus, even if the condensed water in the passage portion of downstream flows into upstream side passage portion from the upper end of connector, prominent wall also can be utilized to suppress this condensed water to be introduced in exhaust outlet.Accordingly, it is capable to suppression condensed water sputtering is in exhaust manifold, as a result of which it is, the Abgassensor being assemblied in exhaust manifold can be protected.
It addition, the sectional area of upstream side passage portion is the biggest further away from prominent wall.Thus, even if condensed water accumulates in upstream side passage portion, also can be by this condensation water collection in the connector side with downstream passage portion.The condensed water accumulating in connector side is longer to the distance of exhaust outlet, and this condensed water therefore can be suppressed to be introduced in exhaust outlet.Accordingly, it is capable to suppression condensed water sputtering is in exhaust manifold, as a result of which it is, the Abgassensor being assemblied in exhaust manifold can be protected.
Additionally, above-mentioned prominent wall be the 1st highlight wall in the case of, the 1st of upstream side passage portion highlight formed between wall and connector from ceiling prominent facing to bottom surface the 2nd highlight wall, the 2nd bottom highlighting wall is set below the position of the 1st upper end highlighting wall.Thus, labyrinth-like can be formed in upstream side passage portion, condensed water can be suppressed to be introduced into exhaust outlet from upstream side passage portion.Accordingly, it is capable to suppression condensed water sputtering is in exhaust manifold, as a result of which it is, the Abgassensor being assemblied in exhaust manifold can be protected.
It addition, make the 1st face highlighting the side contrary with exhaust outlet of either one that wall and the 2nd highlights wall cave in and form concave curved surface.Thus, the condensed water moved to exhaust side in upstream side passage portion clashes into concave curved surface and returns to opposite direction, i.e. downstream passage portion direction can suppress condensed water to be introduced into exhaust outlet from upstream side passage portion.Accordingly, it is capable to suppression condensed water sputtering is in exhaust manifold, as a result of which it is, the Abgassensor being assemblied in exhaust manifold can be protected.
It addition, form the groove caved in downwards in the bottom surface of upstream side passage portion between prominent wall and connector.Thus, condensed water accumulates in groove, and condensed water can be suppressed to be introduced into exhaust outlet from upstream side passage portion.Accordingly, it is capable to suppression condensed water sputtering is in exhaust manifold, as a result of which it is, the Abgassensor being assemblied in exhaust manifold can be protected.
Accompanying drawing explanation
Fig. 1 is the front view of the 1st embodiment of the mobile engine of the exhaust gas recirculation device illustrating the application present invention.
Fig. 2 is the side view of the mobile engine of Fig. 1.
Fig. 3 is the stereogram of the cylinder head of the mobile engine of Fig. 1.
Fig. 4 is the Section X-X figure of Fig. 1.
Fig. 5 is the explanatory diagram of the flowing of the waste gas in the exhaust gas recirculation path of the mobile engine of Fig. 1.
Fig. 6 is the amplification plan view of the upstream side passage portion periphery of the exhaust gas recirculation path of Fig. 4.
Fig. 7 is the front view of the upstream side passage portion of the exhaust gas recirculation path of Fig. 4.
Fig. 8 is the front view of the upstream side passage portion of the exhaust gas recirculation path of the 2nd embodiment of the exhaust gas recirculation device of the mobile engine illustrating the present invention.
Fig. 9 is the front view of the upstream side passage portion of the exhaust gas recirculation path of the 3rd embodiment of the exhaust gas recirculation device of the mobile engine illustrating the present invention.
Detailed description of the invention
Below, the 1st embodiment of the exhaust gas recirculation device of the mobile engine of the present invention it is described with reference to.Fig. 1 is the front view of the mobile engine of present embodiment, and Fig. 2 is the side view of the mobile engine of Fig. 1.In the mobile engine of present embodiment, it is equipped with cylinder head 2 in the upper surface of cylinder block 1, is equipped with valve mechanism cover 3 in the upper surface of cylinder head 2.Be formed with crankcase 4 in the bottom of cylinder block 1, bent axle 5 can rotatably be accommodated in this crankcase 4.It addition, in the lower surface of cylinder block 1, be equipped with not shown oil sump.In this mobile engine, it is equipped with not shown speed changer in the diagram right of Fig. 1.
On the composition surface with cylinder block 1 of cylinder head 2, it is formed along bank of cylinder multiple, is 3 not shown combustion chambers in the present embodiment.Therefore, the axis of bent axle 5 is parallel with the orientation of combustion chamber, i.e. bank of cylinder.Additionally, engine main body is equipped on vehicle at various orientations, but general cylinder head 2 is equipped on the top of cylinder block 1, is therefore defined as the direction, above engine, opposite direction being defined as below engine.
Fig. 3 is the stereogram of the cylinder head of the mobile engine of Fig. 1, and Fig. 4 is the Section X-X figure of Fig. 1.Each combustion chamber is connected to air inlet 6 and exhaust outlet 7, and air inlet 6 is for by this combustion chamber of gaseous mixture inspiration, and exhaust outlet 7 for discharging waste gas from this combustion chamber.In the present embodiment, each combustion chamber connects 2 air inlets 6 and 2 exhaust outlets 7.The import of the combustion chamber side end of air inlet 6 is by not shown inlet valve opening and closing, and the outlet of the combustion chamber side end of exhaust outlet 7 is by exhaust valve opening and closing.Additionally, especially because combustion chamber, exhaust outlet become high temperature, be therefore formed around being referred to as the cooling water path of water jacket at them, they are flowed through the cooling water cooling of this cooling water path.Cooling water flows to the cooling water path in cylinder head 2 from cooling water inlet portion 12.
All the air inlet 6 of cylinder is connected to inlet manifold 8, and the exhaust outlet 7 of whole cylinders is connected to exhaust manifold 9.Inlet manifold 8 is assembled to the downside end face of the Fig. 4 in cylinder head 2, the end face in the direction i.e. intersected with bank of cylinder direction.It addition, exhaust manifold 9 is assembled to the upside end face of the Fig. 4 in cylinder head 2, the other end in the direction i.e. intersected with bank of cylinder direction.Inlet manifold 8 is connected to not shown admission line, and exhaust manifold 9 is connected to blast pipe 10 via catalyst etc..Additionally, be equipped with the Abgassensor 19 of detection waste gas in blast pipe 10.
The waste gas produced in combustion chamber is discharged to the outside from blast pipe 10 via exhaust outlet 7 and exhaust manifold 9.In the present embodiment, the part making this waste gas is back to the exhaust gas recirculation device of air inlet side and is arranged at cylinder head 2.Reference 11 in figure is the control valve of the backflow for controlling this waste gas, commonly referred to as EGR valve.The entrance side of EGR valve 11 is connected to exhaust outlet 7, and the outlet side of EGR valve 11 is connected to inlet manifold 8.Therefore, when EGR valve 11 is opened, a part for waste gas is back to inlet manifold 8.It addition, when EGR valve 11 is closed, a part for waste gas will not be back to air inlet side.
Owing to waste gas is high temperature, when the part making waste gas is back to air inlet side, it is desirable to it is cooled down.In the present embodiment, such as a part for the waste gas in the exhaust outlet 7 of the diagram right-hand member side of Fig. 4 is supplied to EGR valve 11 from exhaust gas recirculation path 13.This exhaust gas recirculation path 13 includes: along the upstream side passage portion 14 of the other end in the direction intersected with bank of cylinder direction of the cylinder head 2 being equipped with above-mentioned exhaust manifold 9；And from this upstream side passage portion 14 towards the downstream passage portion 15 of one end in the direction intersected with bank of cylinder direction of cylinder head 2.Above-mentioned EGR valve 11 is connected to the end of downstream side of the downstream passage portion 15 of exhaust gas recirculation path 13.
Wherein, as Fig. 3 also expresses, the downstream path of exhaust gas recirculation path 13
The outer peripheral face in portion 15 is positioned at the inside in cooling water inlet portion 12.Therefore, flow through a part for waste gas in the downstream passage portion 15 of exhaust gas recirculation path 13 by for example through the cooling water cooling in cooling water inlet portion 12, be supplied to inlet manifold 8 from EGR valve 11 after the cooling period.On the other hand, the upstream side passage portion 14 of exhaust gas recirculation path 13 includes concave part 16, and concave part 16 is at the other end opening in the direction intersected with bank of cylinder direction of the cylinder head 2 being equipped with exhaust manifold 9.Such as it is shown in fig. 7, the bottom surface 22 of this concave part 16 is along with the step-down away from exhaust outlet 7 side.Fig. 5 is the explanatory diagram of the flowing of the waste gas in exhaust gas recirculation path 13, and Fig. 6 is the amplification plan view of the upstream side passage portion periphery of the exhaust gas recirculation path of Fig. 4.As Fig. 6 expresses, by with covering concave part 16 across liner 17 and constitute upstream side passage portion 14 for exhaust manifold 9 being assembled to the lid component 18 of cylinder head 2.Additionally, the connecting portion of upstream side passage portion 14 and downstream passage portion 15 is referred to as connector 20.
Fig. 7 is the front view of the upstream side passage portion 14 of the exhaust gas recirculation path 13 of Fig. 4.In the present embodiment, highlight wall 21 by the 1st and be formed at exhaust outlet 7 side end of upstream side passage portion 14.1st highlights wall 21 highlights from the bottom surface 22 of upstream side passage portion 14 towards ceiling face 23 and has gap set in advance relative to ceiling face 23.In the present embodiment, as it has been described above, in the downstream passage portion 15 of exhaust gas recirculation path 13, the cooling water cooling that a part for waste gas is flowed through in cooling water inlet portion 12, therefore there is the possibility producing condensed water in downstream passage portion 15.
Hollow arrow in Fig. 7 illustrates the flowing of condensed water.Such as, the condensed water of the waste gas produced in downstream passage portion 15 flows to exhaust outlet 7 side in upstream side passage portion 14.Such as, when driver's bend the throttle at a heat, the flow velocity of the waste gas flowing to exhaust outlet 7 from cylinder is increased sharply, and has condensed water in the upstream side passage portion 14 of exhaust gas recirculation path 13 due to the negative pressure that is accompanied by this and the possibility being introduced into exhaust outlet 7.Further, the condensed water introduced in exhaust outlet 7 flows into blast pipe 10 via exhaust manifold 9.Being equipped with Abgassensor 19 at blast pipe 10, when condensed water is attached to this Abgassensor 19, Abgassensor 19 likely soaks and ruptures or performance reduction.
In the present embodiment, highlighting wall 21 by the 1st and be formed at exhaust outlet 7 side end of upstream side passage portion 14, therefore this prominent wall 21 becomes obstacle, and condensed water can be suppressed to be introduced in exhaust outlet 7, and result can protect Abgassensor 19.It addition, in the present embodiment, the 1st upper end highlighting wall 21 is set in the position of the kernel of section O of the exhaust outlet 7 connected higher than upstream side passage portion 14.Even if in the case of the condensed water in upstream side passage portion 14 is introduced in exhaust outlet 7 due to the flowing of waste gas, condensed water is also attach to the ceiling face of exhaust outlet 7.Owing to the main flow of the waste gas in exhaust outlet 7 is near the kernel of section O of exhaust outlet 7, therefore the attachment position of condensed water deviates from the main flow of waste gas, can reduce the amount of the condensed water of the flowing taking waste gas.
It addition, the 1st upper end highlighting wall 21 to be set in the position of the upper end of the connector 20 higher than upstream side passage portion 14 and downstream passage portion 15.Accordingly, it is capable to the condensed water that suppression flows into upstream side passage portion 14 from the upper end of connector 20 is introduced directly in exhaust outlet 7.It addition, as Fig. 6 expresses, making the sectional area of upstream side passage portion 14 is that to highlight wall 21 further away from the 1st the biggest.Thus, the condensation water collection of upstream side passage portion 14 will can be accumulated in connector 20 side with downstream passage portion 15.The condensed water accumulating in connector 20 side is longer to the distance of exhaust outlet 7, and this condensed water therefore can be suppressed to be introduced in exhaust outlet 7.
So, in the exhaust gas recirculation device of the mobile engine of present embodiment, in the case of mobile engine has multiple cylinder, the one end in the direction intersected with bank of cylinder that the inlet manifold 8 being connected with the air inlet 6 of each cylinder is assembled to cylinder head 2.It addition, the other end in the direction intersected with bank of cylinder that the exhaust manifold 9 being connected with the exhaust outlet 7 of each cylinder is assembled to cylinder head 2.The Abgassensor 19 of waste gas detection discharged from exhaust outlet 7 is assemblied in exhaust manifold 9.Further, the exhaust gas recirculation path 13 part flowing through the waste gas of exhaust outlet 7 being back to air inlet 6 or inlet manifold 8 is formed at cylinder head 2.This exhaust gas recirculation path 13 possesses: upstream side passage portion 14, and it is formed towards bank of cylinder direction from exhaust outlet 7 in the side, the other end in the direction intersected with bank of cylinder of cylinder head 2, and the bottom surface 22 of upstream side passage portion 14 is along with the step-down away from exhaust outlet 7 side；And downstream passage portion 15, it is connected with upstream side passage portion 14, towards the direction formation intersected with bank of cylinder.Downstream passage portion 15 is cooled the cooling water cooling in intake section (path) 12.Further, by prominent towards ceiling face 23 from the bottom surface 22 of upstream side passage portion 14 and relative to ceiling face 23, there is the 1st of gap set in advance and highlight wall 21 and be formed at exhaust outlet 7 side end of upstream side passage portion 14.Therefore, the condensed water of the waste gas produced in exhaust gas recirculation path 13 is difficult in flow to exhaust outlet 7 side in upstream side passage portion 14.Even if it addition, condensed water flows to exhaust outlet 7 side in upstream side passage portion 14, the 1st also being utilized to highlight wall 21 and to suppress condensed water to be introduced in exhaust outlet 7, accordingly, it is capable to suppression condensed water sputtering is in exhaust manifold 9.Further, as a result of which it is, the Abgassensor 19 being assemblied in exhaust manifold 9 can be protected.
It addition, the 1st upper end highlighting wall 21 to be set in the position of the kernel of section O of the exhaust outlet 7 connected higher than upstream side passage portion 14.Thus, even if condensed water is introduced into due to the flowing of waste gas in exhaust outlet 7, condensed water also can be made to be attached to the ceiling face of exhaust outlet 7.Thus, the main flow of condensed water waste gas in exhaust outlet 7 can be made to stagger, the condensation water quantity of the flowing taking waste gas can be reduced.Accordingly, it is capable to suppression condensed water sputtering is in exhaust manifold 9, as a result of which it is, the Abgassensor 19 being assemblied in exhaust manifold 9 can be protected.
It addition, the 1st upper end highlighting wall 21 to be set in the position of the upper end of the connector 20 higher than upstream side passage portion 14 and downstream passage portion 15.Thus, even if the condensed water in downstream passage portion 15 flows into upstream side passage portion 14 from the upper end of connector 20, the 1st also can be utilized to highlight wall 21 and to suppress this condensed water to be introduced in exhaust outlet 7.Accordingly, it is capable to suppression condensed water sputtering is in exhaust manifold 9, as a result of which it is, the Abgassensor 19 being assemblied in exhaust manifold 9 can be protected.
It addition, the sectional area of upstream side passage portion 14 is that to highlight wall 21 further away from the 1st the biggest.Thus, even if condensed water accumulates in upstream side passage portion 14, also can be by this condensation water collection to connector 20 side with downstream passage portion 15.Longer to the distance of exhaust outlet 7 owing to accumulating in the condensed water of connector 20 side, this condensed water therefore can be suppressed to be introduced in exhaust outlet 7.Accordingly, it is capable to suppression condensed water sputtering is in exhaust manifold 9, as a result of which it is, the Abgassensor 19 being assemblied in exhaust manifold 9 can be protected.
Fig. 8 is the front view of the upstream side passage portion 14 of the exhaust gas recirculation path 13 of the 2nd embodiment of the exhaust gas recirculation device of the mobile engine illustrating the present invention.The exhaust gas recirculation device of present embodiment is similar with the exhaust gas recirculation device of above-mentioned 1st embodiment.Therefore, equal constitutive requirements are accompanied by equal reference and description is omitted.The main composition of the mobile engine of present embodiment is identical with Fig. 1～Fig. 4 of above-mentioned 1st embodiment.It addition, the main composition of the exhaust gas recirculation path 13 of present embodiment is identical with Fig. 5, Fig. 6 of above-mentioned 1st embodiment.
In the exhaust gas recirculation path 13 of present embodiment, the composition from Fig. 7 of above-mentioned 1st embodiment that constitutes in upstream side passage portion 14 is changed to the composition of Fig. 8.In this upstream side passage portion 14, the 1st for above-mentioned exhaust outlet 7 side end highlights wall 21, highlights formation the 2nd between wall 21 and connector 20 the 1st and highlights wall 24, highlights formation the 3rd between wall 24 and connector 20 the 2nd and highlights wall 25.Wherein, the 2nd highlights wall 24 is formed from the ceiling face 23 of upstream side passage portion 14 towards bottom surface 22 is prominent, highlights the 2nd and has gap set in advance between wall 24 and bottom surface 22.It addition, the 3rd highlights wall 25 from the bottom surface 22 of upstream side passage portion 14 towards the prominent formation in ceiling face 23, highlight the 3rd and there is between wall 25 and ceiling face 23 gap set in advance.And, the 2nd bottom highlighting wall 24 is set below the position of the 1st upper end highlighting wall 21, the 3rd upper end highlighting wall 25 is set in the position higher than the 2nd bottom highlighting wall 24.
Form multiple prominent walls 21,24,25 by the most prominent, labyrinth structure can be formed in upstream side passage portion 14.Therefore, Fig. 8 will be set to labyrinth-like with the flowing of the condensed water shown in hollow arrow, condensed water can be suppressed to be introduced into exhaust outlet 7.Accordingly, it is capable to suppression condensed water sputtering is in exhaust manifold 9, as a result of which it is, the Abgassensor 19 being assemblied in exhaust manifold 9 can be protected.Particularly, as in this embodiment, (another) end face in the direction intersected with bank of cylinder of cylinder head 2 form concave part 16 and in the case of constituting upstream side passage portion 14, it is easy to form staggered prominent wall 21,24,25 as above.
It addition, in the present embodiment, making the 1st to highlight wall 21, caves in and forms concave curved surface 26 in the 2nd face highlighting the side contrary with exhaust outlet 7 that wall 24 and the 3rd highlights wall 25.Thus, as shown in hollow arrow in Fig. 8, in upstream side passage portion 14, clash into the concave curved surface 26 of each prominent wall 21,24,25 to the condensed water of exhaust outlet 7 side shifting and return to opposite direction, i.e. downstream passage portion 15 direction, can suppress condensed water to be introduced into exhaust outlet 7 from upstream side passage portion 14.Accordingly, it is capable to suppression condensed water sputtering is in exhaust manifold 9, as a result of which it is, the Abgassensor 19 being assemblied in exhaust manifold 9 can be protected.
Fig. 9 is the front view of the upstream side passage portion 14 of the exhaust gas recirculation path 13 of the 3rd embodiment of the exhaust gas recirculation device of the mobile engine illustrating the present invention.The exhaust gas recirculation device of present embodiment is similar with the exhaust gas recirculation device of above-mentioned 1st embodiment.Therefore, equal constitutive requirements are accompanied by equal reference and description is omitted.The main composition of the mobile engine of present embodiment is identical with Fig. 1～Fig. 4 of above-mentioned 1st embodiment.It addition, the main composition of the exhaust gas recirculation path 13 of present embodiment is identical with Fig. 5, Fig. 6 of above-mentioned 1st embodiment.
In the exhaust gas recirculation path 13 of present embodiment, highlight the 1st in the bottom surface 22 of upstream side passage portion 14 and between wall 21 and connector 20, form the groove 27 caved in downwards.Thus, as shown in hollow arrow in this figure, condensed water accumulates in groove 27, and condensed water can be suppressed to be introduced into exhaust outlet 7 from upstream side passage portion 14.Accordingly, it is capable to suppression condensed water sputtering is in exhaust manifold 9, as a result of which it is, the Abgassensor 19 being assemblied in exhaust manifold 9 can be protected.
Claims (9)
1. there is an exhaust gas recirculation device for the mobile engine of multiple cylinder, comprise:
Inlet manifold, the one end in its direction intersected with bank of cylinder being assemblied in cylinder head,
It is connected with the air inlet of each cylinder；
Exhaust manifold, its direction intersected with above-mentioned bank of cylinder being assemblied in above-mentioned cylinder head
The other end, is connected with the exhaust outlet of above-mentioned each cylinder；
Abgassensor, it is assemblied in above-mentioned exhaust manifold, detects and discharge from above-mentioned exhaust outlet
Waste gas；And
Exhaust gas recirculation path, it is formed at above-mentioned cylinder head, flows through the useless of above-mentioned exhaust outlet
A part for gas is back to above-mentioned air inlet or above-mentioned inlet manifold, and above-mentioned exhaust gas recirculation leads to
Road includes: upstream side passage portion, and it is in the side intersected with above-mentioned bank of cylinder of above-mentioned cylinder head
To side, the other end from above-mentioned exhaust outlet towards bank of cylinder direction formed, above-mentioned upstream side lead to
The bottom surface in road portion is along with the step-down away from above-mentioned exhaust side；And downstream passage portion, its
It is connected with above-mentioned upstream side passage portion, towards the direction formation intersected with above-mentioned bank of cylinder, quilt
The cooling water cooling being formed in the cooling water path of above-mentioned cylinder head,
Having prominent wall in above-mentioned upstream side passage portion, this prominent wall is formed at above-mentioned upstream side
The exhaust-port-side of passage portion, highlights and relative to upper from above-mentioned bottom surface towards ceiling face
State ceiling mask and have gap set in advance.
The exhaust gas recirculation device of mobile engine the most according to claim 1,
The upper end of above-mentioned prominent wall is set in and is connected higher than above-mentioned upstream side passage portion
The position of kernel of section of above-mentioned exhaust outlet.
The exhaust gas recirculation device of mobile engine the most according to claim 2,
The upper end of above-mentioned prominent wall is set in higher than above-mentioned upstream side passage portion and above-mentioned
The position of the upper end of the connector of downstream passage portion.
The exhaust gas recirculation device of mobile engine the most according to claim 3,
The sectional area of above-mentioned upstream side passage portion is the biggest further away from above-mentioned prominent wall.
The exhaust gas recirculation device of mobile engine the most according to claim 4,
Above-mentioned prominent wall be the 1st highlight wall in the case of, upper in above-mentioned upstream side passage portion
State the 1st highlight formed between wall and above-mentioned connector from above-mentioned ceiling prominent facing to above-mentioned bottom surface
The 2nd gone out highlights wall, above-mentioned 2nd bottom highlighting wall is set below the above-mentioned 1st and dashes forward
Go out the position of the upper end of wall.
The exhaust gas recirculation device of mobile engine the most according to claim 5,
Make the above-mentioned 1st highlight wall and the above-mentioned 2nd highlight wall either one with above-mentioned row
Cave in and form concave curved surface in the face of the side that gas port is contrary.
The exhaust gas recirculation device of mobile engine the most according to claim 3,
Above-mentioned prominent wall be the 1st highlight wall in the case of, upper in above-mentioned upstream side passage portion
State the 1st highlight formed between wall and above-mentioned connector from above-mentioned ceiling prominent facing to above-mentioned bottom surface
The 2nd gone out highlights wall, above-mentioned 2nd bottom highlighting wall is set below the above-mentioned 1st and dashes forward
Go out the position of the upper end of wall.
The exhaust gas recirculation device of mobile engine the most according to claim 7,
Make the above-mentioned 1st highlight wall and the above-mentioned 2nd highlight wall either one with above-mentioned row
Cave in and form concave curved surface in the face of the side that gas port is contrary.
The exhaust gas recirculation device of mobile engine the most according to claim 3,
In above-mentioned prominent wall and above-mentioned connection in the above-mentioned bottom surface of above-mentioned upstream side passage portion
The groove caved in downwards is formed between Kou.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012288966A JP6040771B2 (en) | 2012-12-28 | 2012-12-28 | Exhaust gas recirculation device for vehicle engine |
| JP2012-288966 | 2012-12-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103912411A CN103912411A (en) | 2014-07-09 |
| CN103912411B true CN103912411B (en) | 2016-09-07 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310495897.5A Expired - Fee Related CN103912411B (en) | 2012-12-28 | 2013-10-21 | The exhaust gas recirculation device of mobile engine |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6040771B2 (en) |
| CN (1) | CN103912411B (en) |
| DE (1) | DE102013224946B4 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6706304B2 (en) * | 2018-10-02 | 2020-06-03 | 本田技研工業株式会社 | Engine head cover structure |
| CN109915275A (en) * | 2019-03-28 | 2019-06-21 | 广西玉柴机器股份有限公司 | A kind of three way type cylinder cap cooling structure of exhaust duct part necking |
| JP7296251B2 (en) * | 2019-05-31 | 2023-06-22 | ダイハツ工業株式会社 | EGR device for internal combustion engine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1233170A2 (en) * | 2001-02-20 | 2002-08-21 | Nissan Motor Co., Ltd. | Recirculated exhaust gas cooling device for internal combustion engine |
| CN2895750Y (en) * | 2006-03-24 | 2007-05-02 | 陈申鸿 | Motorcycle crank-box exhuast-gas recirculation condensed-water collector |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0447155A (en) * | 1990-06-13 | 1992-02-17 | Hino Motors Ltd | Electronic control device for exhaust gas recirculation |
| JPH07269392A (en) * | 1994-03-31 | 1995-10-17 | Suzuki Motor Corp | Automatic start stop device of engine |
| IT1320352B1 (en) * | 2000-05-12 | 2003-11-26 | Iveco Fiat | ENDOTHERMAL ENGINE PROVIDED WITH A DISCHARGE GAS RECIRCULATION SYSTEM, IN PARTICULAR FOR A VEHICLE. |
| JP2001342907A (en) * | 2000-05-30 | 2001-12-14 | Suzuki Motor Corp | Exhaust gas recirculation device for engine |
| JP4496632B2 (en) * | 2000-09-29 | 2010-07-07 | マツダ株式会社 | Engine exhaust gas recirculation passage structure |
| JP5508621B2 (en) | 2009-08-20 | 2014-06-04 | ダイハツ工業株式会社 | Exhaust gas recirculation device in internal combustion engine |
| DE102010005784A1 (en) * | 2010-01-27 | 2011-07-28 | Audi Ag, 85057 | Car with an exhaust system |
| CN103189632B (en) * | 2010-10-28 | 2015-08-26 | 本田技研工业株式会社 | EGR cooling structure body |
-
2012
- 2012-12-28 JP JP2012288966A patent/JP6040771B2/en active Active
-
2013
- 2013-10-21 CN CN201310495897.5A patent/CN103912411B/en not_active Expired - Fee Related
- 2013-12-05 DE DE102013224946.2A patent/DE102013224946B4/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1233170A2 (en) * | 2001-02-20 | 2002-08-21 | Nissan Motor Co., Ltd. | Recirculated exhaust gas cooling device for internal combustion engine |
| CN2895750Y (en) * | 2006-03-24 | 2007-05-02 | 陈申鸿 | Motorcycle crank-box exhuast-gas recirculation condensed-water collector |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6040771B2 (en) | 2016-12-07 |
| CN103912411A (en) | 2014-07-09 |
| JP2014129801A (en) | 2014-07-10 |
| DE102013224946B4 (en) | 2019-10-31 |
| DE102013224946A1 (en) | 2014-07-03 |
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