CN103912411A - Exhaust gas recirculation device of engine for vehicle - Google Patents
Exhaust gas recirculation device of engine for vehicle Download PDFInfo
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- CN103912411A CN103912411A CN201310495897.5A CN201310495897A CN103912411A CN 103912411 A CN103912411 A CN 103912411A CN 201310495897 A CN201310495897 A CN 201310495897A CN 103912411 A CN103912411 A CN 103912411A
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- mentioned
- passage portion
- outstanding wall
- gas recirculation
- exhaust gas
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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
Provided is an exhaust gas recirculation device of an engine for a vehicle, capable of suppressing condensed water generated in an exhaust gas recirculation passage in a cylinder cover to spray into an exhaust manifold. The exhaust gas recirculation passage (13) has an upstream passage portion (14) and a downstream passage portion (15). The downstream passage portion (15) is cooled by cooling water in a cooling water inlet portion (12). A projecting wall (21) protruding from a bottom surface (22) of the upstream passage portion (14) towards a ceiling surface (23) and having a gap relative to the ceiling surface (23) is formed at an end portion of the side of an exhaust port (7) of the upstream passage portion (14). In addition, an upper end portion of the projecting wall (21) is higher than a center of the section (O) of the exhaust port (7). And the upper end portion of the projecting wall (21) is higher than an upper end portion of a connecting port (20) of the upstream passage portion (14) and the downstream passage portion (15).
Description
Technical field
The exhaust gas recirculation device of the mobile engine that the present invention relates to use in vehicle, the exhaust gas recirculation path that is suitable for the part for the waste gas of the relief opening that makes to flow through to be back to suction port or intake manifold is formed at the situation of cylinder head.
Background technique
As the exhaust gas recirculation device that like this exhaust gas recirculation path is formed to the mobile engine of cylinder head, there is the device of recording in No. 2011-43096, JP for example.In the exhaust gas recirculation device of this mobile engine, in a side of cylinder head that is equipped with gas exhaust manifold, will be formed on bank of cylinder direction, i.e. crankshaft direction with the continuous groove of relief opening.The part of a side contrary with relief opening of this groove with towards being equipped with the another side of cylinder head of intake manifold and the exhaust gas recirculation passage downstream portion that is formed in this cylinder head is connected.And, form exhaust gas recirculation path upstream portion by using the cover plate being wholely set with gas exhaust manifold to cover groove.Now, the part distortion of the covering groove by making cover plate forms with the side away from cylinder head the portion of heaving, and heaves portion and groove forms exhaust gas recirculation path upstream portion by this.
As the exhaust gas recirculation device of the mobile engine of recording in No. 2011-43096, JP, it is because utilize the flow through situation of the waste gas in exhaust gas recirculation path of water quench in the cooling water path in cylinder head more that exhaust gas recirculation path is formed in cylinder head.In the exhaust gas recirculation device of the mobile engine of recording in No. 2011-43096, JP, there is cooling water path near that is formed on the exhaust gas recirculation passage downstream portion in cylinder head, the water quench that the waste gas of the exhaust gas recirculation passage downstream of flowing through portion is cooled in water passage.On the other hand, in the exhaust gas recirculation device of the mobile engine of recording in No. 2011-43096, JP, the height of the exhaust gas recirculation path upstream portion being made up of groove and the portion of heaving is more higher away from relief opening, lower the closer to exhaust side.As mentioned above, in the time that the waste gas of exhaust gas recirculation passage downstream portion is cooled water quench in water passage, there is the possibility that produces the condensed water after waste gas condensation in exhaust gas recirculation passage downstream portion.Now, in the time that the exhaust side of exhaust gas recirculation path upstream portion is lower, the condensed water producing in exhaust gas recirculation passage downstream portion is easy to flow into exhaust side from exhaust gas recirculation path upstream portion.For example, driver, at a heat bend the throttle in the situation that, the flow velocity that flows to the waste gas of relief opening from cylinder is increased sharply, and the condensed water in exhaust gas recirculation path upstream portion is owing to following the negative pressure in this to be introduced into relief opening.Then, introduce the condensed water of relief opening because the flow velocity of waste gas flows to gas exhaust manifold, further flow to the Abgassensor that is disposed at gas exhaust manifold, Abgassensor condensation by contact water, Abgassensor likely soaks and breaks or performance reduction.
Summary of the invention
The present invention is conceived to the problems referred to above point and makes, and its object is to provide the condensed water sputtering that produces in the exhaust gas recirculation path that can be suppressed in the cylinder head exhaust gas recirculation device to the mobile engine in gas exhaust manifold.
In order to address the above problem, working of an invention mode is the exhaust gas recirculation device with the mobile engine of multiple cylinders, comprise: intake manifold, an end of its direction of intersecting with above-mentioned bank of cylinder that is assemblied in cylinder head, is connected with the suction port of above-mentioned each cylinder; Gas exhaust manifold, the other end of its direction of intersecting with above-mentioned bank of cylinder that is assemblied in above-mentioned cylinder head, is connected with the relief opening of above-mentioned each cylinder; Abgassensor, it is assemblied in above-mentioned gas exhaust manifold, detects the waste gas of discharging from above-mentioned relief opening; Exhaust gas recirculation path, it is formed at above-mentioned cylinder head, and a part for the waste gas of the above-mentioned relief opening that makes to flow through is back to above-mentioned suction port or above-mentioned intake manifold; Upstream side passage portion, it forms above-mentioned exhaust gas recirculation path, the other end side in the direction of intersecting with above-mentioned bank of cylinder of above-mentioned cylinder head forms towards above-mentioned bank of cylinder direction from above-mentioned relief opening, and the bottom surface of above-mentioned upstream side passage portion is along with the step-down away from above-mentioned exhaust side; Downstream side passage portion, it forms above-mentioned exhaust gas recirculation path, is connected with above-mentioned upstream side passage portion, forms the water quench being cooled in water passage towards the direction of intersecting with above-mentioned bank of cylinder; And outstanding wall, it is formed at the above-mentioned exhaust side end of above-mentioned upstream side passage portion, gives prominence to and has predefined gap with respect to above-mentioned ceiling mask from above-mentioned bottom surface towards ceiling face.
In addition, the upper end portion of above-mentioned outstanding wall is set in to the position of the kernel of section of the above-mentioned relief opening connecting higher than above-mentioned upstream side passage portion.
In addition, the upper end portion of above-mentioned outstanding wall is set in to the position higher than the upper end portion of the connection mouth of above-mentioned upstream side passage portion and above-mentioned downstream side passage portion.
In addition, the sectional area of above-mentioned upstream side passage portion is more larger away from above-mentioned outstanding wall.
In addition, above-mentioned outstanding wall is in the situation of the 1st outstanding wall, between the above-mentioned the 1st outstanding wall of above-mentioned upstream side passage portion and above-mentioned connection mouth, form from above-mentioned ceiling facing to the 2nd outstanding outstanding wall of above-mentioned bottom surface, the underpart of the above-mentioned the 2nd outstanding wall is set in to the position lower than the upper end portion of the above-mentioned the 1st outstanding wall.
In addition, make the face of at least either party's of the above-mentioned the 1st outstanding wall and the above-mentioned the 2nd outstanding wall a side contrary with above-mentioned relief opening cave in and form concave curved surface.
In addition, in the above-mentioned bottom surface of above-mentioned upstream side passage portion, between above-mentioned outstanding wall and above-mentioned connection mouth, form the groove of depression downwards.
Therefore, according to working of an invention mode, in the situation that mobile engine has multiple cylinder, an end of the direction of intersecting with bank of cylinder that the intake manifold being connected with the suction port of each cylinder is assemblied in to cylinder head.In addition, the other end of the direction of intersecting with bank of cylinder that the gas exhaust manifold being connected with the relief opening of each cylinder is assemblied in to cylinder head.The Abgassensor that detects the waste gas of discharging from relief opening is assemblied in to gas exhaust manifold.And the exhaust gas recirculation path that a part for the waste gas of the relief opening that makes to flow through is back to suction port or intake manifold is formed at cylinder head.This exhaust gas recirculation path possesses: upstream side passage portion, and its other end side in the direction of intersecting with bank of cylinder of cylinder head forms towards bank of cylinder direction from relief opening, and the bottom surface of above-mentioned upstream side passage portion is along with the step-down away from exhaust side; And downstream side passage portion, it is connected with upstream side passage portion, forms the water quench being cooled in water passage towards the direction of intersecting with above-mentioned bank of cylinder.And, the bottom surface from upstream side passage portion is given prominence to and is had the outstanding wall in predefined gap to be formed at the exhaust side end of upstream side passage portion with respect to ceiling mask towards ceiling face.The condensed water of the waste gas therefore, producing in exhaust gas recirculation path is difficult to flow to exhaust side in upstream side passage portion.In addition, even if condensed water flows to exhaust side in upstream side passage portion, also can utilize outstanding wall to suppress condensed water and be introduced in relief opening, therefore, can suppress condensed water and disperse in gas exhaust manifold.And, consequently, can protect the Abgassensor that is assemblied in gas exhaust manifold.
In addition, the upper end portion of outstanding wall is set in to the position of the kernel of section of the relief opening connecting higher than upstream side passage portion.Thus, even if condensed water is because flowing of waste gas is introduced in relief opening, also can make condensed water be attached to the ceiling face of relief opening.Thus, can make condensed water stagger from the main flow of the waste gas in relief opening, can reduce the mobile condensation water quantity of taking waste gas.Therefore, condensed water sputtering can be suppressed in gas exhaust manifold, consequently, the Abgassensor that is assemblied in gas exhaust manifold can be protected.
In addition, the upper end portion of outstanding wall is set in to the position higher than the upper end portion of the connection mouth of upstream side passage portion and downstream side passage portion.Thus, even if the condensed water in the passage portion of downstream side flows into upstream side passage portion from the upper end portion of connection mouth, also can utilize outstanding wall to suppress this condensed water and be introduced in relief opening.Therefore, condensed water sputtering can be suppressed in gas exhaust manifold, consequently, the Abgassensor that is assemblied in gas exhaust manifold can be protected.
In addition, the sectional area of upstream side passage portion is more larger away from outstanding wall.Thus, even if condensed water accumulates in upstream side passage portion, also can by this condensation water collection with the connection mouth side of downstream side passage portion.The condensed water that accumulates in connection mouth side is longer to the distance of relief opening, therefore can suppress this condensed water and be introduced in relief opening.Therefore, condensed water sputtering can be suppressed in gas exhaust manifold, consequently, the Abgassensor that is assemblied in gas exhaust manifold can be protected.
In addition, above-mentioned outstanding wall is in the situation of the 1st outstanding wall, between the 1st outstanding wall of upstream side passage portion and connection mouth, form from ceiling facing to the 2nd outstanding outstanding wall of bottom surface, the underpart of the 2nd outstanding wall is set in to the position lower than the upper end portion of the 1st outstanding wall.Thus, can in upstream side passage portion, form labyrinth-like, can suppress condensed water and be introduced into relief opening from upstream side passage portion.Therefore, condensed water sputtering can be suppressed in gas exhaust manifold, consequently, the Abgassensor that is assemblied in gas exhaust manifold can be protected.
In addition, make the face of at least either party's of the 1st outstanding wall and the 2nd outstanding wall a side contrary with relief opening cave in and form concave curved surface.Thus, the condensed water moving to exhaust side in upstream side passage portion clashes into concave curved surface and turns back in the other direction, i.e. downstream side passage portion direction, can suppress condensed water and be introduced into relief opening from upstream side passage portion.Therefore, condensed water sputtering can be suppressed in gas exhaust manifold, consequently, the Abgassensor that is assemblied in gas exhaust manifold can be protected.
In addition, in the bottom surface of upstream side passage portion, between outstanding wall and connection mouth, form the groove of depression downwards.Thus, condensed water accumulates in groove, can suppress condensed water and be introduced into relief opening from upstream side passage portion.Therefore, condensed water sputtering can be suppressed in gas exhaust manifold, consequently, the Abgassensor that is assemblied in gas exhaust manifold can be protected.
Accompanying drawing explanation
Fig. 1 is the plan view that the 1st mode of execution of the mobile engine of application exhaust gas recirculation device of the present invention is shown.
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 X-X sectional view of Fig. 1.
Fig. 5 is the mobile explanatory drawing of the waste gas in the exhaust gas recirculation path of 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 plan view of the upstream side passage portion of the exhaust gas recirculation path of Fig. 4.
Fig. 8 is the plan view that the upstream side passage portion of the exhaust gas recirculation path of the 2nd mode of execution of the exhaust gas recirculation device of mobile engine of the present invention is shown.
Fig. 9 is the plan view that the upstream side passage portion of the exhaust gas recirculation path of the 3rd mode of execution of the exhaust gas recirculation device of mobile engine of the present invention is shown.
Embodiment
Below, with reference to the accompanying drawings of the 1st mode of execution of the exhaust gas recirculation device of mobile engine of the present invention.Fig. 1 is the plan 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, be equipped with cylinder head 2 in the upper-end surface of cylinder block 1, be equipped with valve mechanism cover 3 in the upper-end surface of cylinder head 2.Be formed with crankcase 4 in the bottom of cylinder block 1, bent axle 5 can rotate freely and be accommodated in this crankcase 4.In addition, in the lower end surface of cylinder block 1, be equipped with not shown oil sump.In this mobile engine, be equipped with not shown speed changer the diagram of Fig. 1 is right-hand.
On cylinder head 2 and mating face cylinder block 1, be formed with multiplely along bank of cylinder, be 3 not shown firing chambers in the present embodiment.Therefore, the axis of bent axle 5 and the orientation of firing chamber, bank of cylinder is parallel.In addition, engine main body is equipped on vehicle with various directions, but general cylinder head 2 is equipped on the top of cylinder block 1, therefore this direction is defined as to motor top, and opposite direction is defined as to motor below.
Fig. 3 is the stereogram of the cylinder head of the mobile engine of Fig. 1, and Fig. 4 is the X-X sectional view of Fig. 1.Each firing chamber is connecting suction port 6 and relief opening 7, and suction port 6 is for by this firing chamber of mixed gas inspiration, and relief opening 7 is for from this firing chamber combustion gas.In the present embodiment, each firing chamber connects 6 and 2 relief openings 7 of 2 suction ports.The import of the combustion chamber side end of suction port 6 is opened and closed by not shown intake valve, and the outlet of the combustion chamber side end of relief opening 7 is opened and closed by exhaust valve.In addition, particularly because firing chamber, relief opening become high temperature, therefore around them, be formed with the cooling water path that is called as water jacket, their flowed through water quench 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 suction port 6 of cylinder is connected to intake manifold 8, and all the relief opening 7 of cylinder is connected to gas exhaust manifold 9.Intake manifold 8 is assembled to the downside end face of the Fig. 4 in cylinder head 2, an end face of the direction of intersecting with bank of cylinder direction.In addition, gas exhaust manifold 9 is assembled to the upside end face of the Fig. 4 in cylinder head 2, the other end of the direction of intersecting with bank of cylinder direction.Intake manifold 8 is connected to not shown admission line, and gas exhaust manifold 9 is connecting outlet pipe 10 via catalyst etc.In addition, in outlet pipe 10, be equipped with the Abgassensor 19 that detects waste gas.
The waste gas producing in firing chamber is discharged to outside via relief opening 7 and gas exhaust manifold 9 from outlet pipe 10.In the present embodiment, the exhaust gas recirculation device that makes the part of this waste gas be back to air inlet side is arranged at cylinder head 2.Reference character 11 in figure is control valves of the backflow for controlling this waste gas, is commonly referred to as EGR valve.The inlet side of EGR valve 11 is connected to relief opening 7, and the outlet side of EGR valve 11 is connected to intake manifold 8.Therefore, in the time that EGR valve 11 is opened, a part for waste gas is back to intake manifold 8.In addition, in the time that EGR valve 11 cuts out, a part for waste gas can not be back to air inlet side.
Because waste gas is high temperature, in the time that a part that makes waste gas is back to air inlet side, wish it to carry out cooling.In the present embodiment, a part for for example, waste gas in the relief opening 7 of the diagram right-hand member side of Fig. 4 is offered to EGR valve 11 from exhaust gas recirculation path 13.This exhaust gas recirculation path 13 comprises: along the upstream side passage portion 14 of the other end of the direction of intersecting with bank of cylinder direction of cylinder head 2 that is equipped with above-mentioned gas exhaust manifold 9; And from this upstream side passage portion 14 the downstream side passage portion 15 towards an end of the direction of intersecting 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 side passage portion 15 of exhaust gas recirculation path 13.
Wherein, as also expressed in Fig. 3, the outer circumferential face of the downstream side passage portion 15 of exhaust gas recirculation path 13 is positioned at the inside of cooling water inlet portion 12.Therefore, a part for the waste gas in the downstream side passage portion 15 of the exhaust gas recirculation path 13 of flowing through the water quench in cooling water inlet portion 12 of for example being flowed through offers intake manifold 8 from EGR valve 11 after cooling.On the other hand, the upstream side passage portion 14 of exhaust gas recirculation path 13 comprises groove part 16, and groove part 16 is being equipped with the other end opening of the direction of intersecting with bank of cylinder direction of cylinder head 2 of gas exhaust manifold 9.For example as shown in Figure 7, the bottom surface 22 of this groove part 16 is along with the step-down away from relief opening 7 sides.Fig. 5 is the mobile explanatory drawing 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 expressed in Fig. 6, the lid member 18 that is used for the gas exhaust manifold 9 to be assembled to cylinder head 2 by use covers groove part 16 across liner 17 and forms upstream side passage portion 14.In addition, the joint of upstream side passage portion 14 and downstream side passage portion 15 is called to connection mouth 20.
Fig. 7 is the plan view of the upstream side passage portion 14 of the exhaust gas recirculation path 13 of Fig. 4.In the present embodiment, the 1st outstanding wall 21 is formed on to relief opening 7 side ends of upstream side passage portion 14.The 1st outstanding wall 21 is given prominence to and has predefined gap with respect to ceiling face 23 towards ceiling face 23 from the bottom surface 22 of upstream side passage portion 14.In the present embodiment, as mentioned above, in the downstream side of exhaust gas recirculation path 13 passage portion 15, a part for waste gas the water quench in cooling water inlet portion 12 of being flowed through, therefore has the possibility at the interior generation condensed water of downstream side passage portion 15.
Hollow arrow in Fig. 7 illustrates flowing of condensed water.For example, in upstream side passage portion 14, flow to relief opening 7 sides at the condensed water of the waste gas of downstream side passage portion 15 interior generations.For example, when driver is at a heat when bend the throttle, the flow velocity that flows to the waste gas of relief opening 7 from cylinder is increased sharply, and has condensed water in the upstream side passage portion 14 of exhaust gas recirculation path 13 owing to following the possibility that is introduced into relief opening 7 in this negative pressure.And the condensed water of introducing in relief opening 7 flows into outlet pipe 10 via gas exhaust manifold 9.Be equipped with Abgassensor 19 at outlet pipe 10, in the time that condensed water is attached to this Abgassensor 19, Abgassensor 19 likely soaks and breaks or performance reduction.
In the present embodiment, the 1st outstanding wall 21 is formed on to relief opening 7 side ends of upstream side passage portion 14, therefore this outstanding wall 21 becomes obstacle, can suppress condensed water and be introduced in relief opening 7, and result can be protected Abgassensor 19.In addition, in the present embodiment, the upper end portion of the 1st outstanding wall 21 is set in to the position of the kernel of section O of the relief opening 7 connecting higher than upstream side passage portion 14.Even in the case of the condensed water in upstream side passage portion 14 due to waste gas flow be introduced in relief opening 7, condensed water is also attached to the ceiling face of relief opening 7.Because the main flow of the waste gas in relief opening 7 is near the kernel of section O of relief opening 7, therefore the attachment position of condensed water departs from from the main flow of waste gas, can reduce the amount of the mobile condensed water of taking waste gas.
In addition, the upper end portion of the 1st outstanding wall 21 is set in to the position higher than the upper end portion of the connection mouth 20 of upstream side passage portion 14 and downstream side passage portion 15.The condensed water that therefore, can suppress to flow into from the upper end portion of connection mouth 20 upstream side passage portion 14 is directly introduced in relief opening 7.In addition, as Fig. 6 expresses, the sectional area that makes upstream side passage portion 14 is more larger away from the 1st outstanding wall 21.Thus, can by the condensation water collection that accumulates in upstream side passage portion 14 to connection mouth 20 sides of downstream side passage portion 15.The condensed water that accumulates in connection mouth 20 sides is longer to the distance of relief opening 7, therefore can suppress this condensed water and be introduced in relief opening 7.
Like this, in the exhaust gas recirculation device of the mobile engine of present embodiment, in the situation that mobile engine has multiple cylinder, an end of the direction of intersecting with bank of cylinder that the intake manifold 8 being connected with the suction port 6 of each cylinder is assembled to cylinder head 2.In addition, the other end of the direction of intersecting with bank of cylinder that the gas exhaust manifold 9 being connected with the relief opening 7 of each cylinder is assembled to cylinder head 2.The Abgassensor 19 that detects the waste gas of discharging from relief opening 7 is assemblied in to gas exhaust manifold 9.And the exhaust gas recirculation path 13 that a part for the waste gas of the relief opening 7 that makes to flow through is back to suction port 6 or intake manifold 8 is formed at cylinder head 2.This exhaust gas recirculation path 13 possesses: upstream side passage portion 14, and its other end side in the direction of intersecting with bank of cylinder of cylinder head 2 forms towards bank of cylinder direction from relief opening 7, and the bottom surface 22 of upstream side passage portion 14 is along with the step-down away from relief opening 7 sides; And downstream side passage portion 15, it is connected with upstream side passage portion 14, forms towards the direction of intersecting with bank of cylinder.Downstream side passage portion 15 water quench in water inlet portion (path) 12 that is cooled.And, the bottom surface from upstream side passage portion 14 22 is outstanding and be formed at relief opening 7 side ends of upstream side passage portion 14 with respect to the 1st outstanding wall 21 that ceiling face 23 has a predefined gap towards ceiling face 23.Therefore, in upstream side passage portion 14, be difficult to flow to relief opening 7 sides at the condensed water of the waste gas of exhaust gas recirculation path 13 interior generations.In addition, even if condensed water flows to relief opening 7 sides in upstream side passage portion 14, also can utilize the 1st outstanding wall 21 to suppress condensed water and be introduced in relief opening 7, therefore, can suppress condensed water sputtering in gas exhaust manifold 9.And, consequently, can protect the Abgassensor 19 that is assemblied in gas exhaust manifold 9.
In addition, the upper end portion of the 1st outstanding wall 21 is set in to the position of the kernel of section O of the relief opening 7 connecting higher than upstream side passage portion 14.Thus, even if condensed water is because flowing of waste gas is introduced in relief opening 7, also can make condensed water be attached to the ceiling face of relief opening 7.Thus, can make condensed water stagger from the main flow of the waste gas in relief opening 7, can reduce the mobile condensation water quantity of taking waste gas.Therefore, condensed water sputtering can be suppressed in gas exhaust manifold 9, consequently, the Abgassensor 19 that is assemblied in gas exhaust manifold 9 can be protected.
In addition, the upper end portion of the 1st outstanding wall 21 is set in to the position higher than the upper end portion of the connection mouth 20 of upstream side passage portion 14 and downstream side passage portion 15.Thus, even if the condensed water in downstream side passage portion 15 flows into upstream side passage portion 14 from the upper end portion of connection mouth 20, also can utilize the 1st outstanding wall 21 to suppress this condensed water and be introduced in relief opening 7.Therefore, condensed water sputtering can be suppressed in gas exhaust manifold 9, consequently, the Abgassensor 19 that is assemblied in gas exhaust manifold 9 can be protected.
In addition, the sectional area of upstream side passage portion 14 is more larger away from the 1st outstanding wall 21.Thus, even if condensed water accumulates in upstream side passage portion 14, also this condensation water collection can be arrived to connection mouth 20 sides with downstream side passage portion 15.Owing to accumulating in, the condensed water of connection mouth 20 sides is longer to the distance of relief opening 7, therefore can suppress this condensed water and be introduced in relief opening 7.Therefore, condensed water sputtering can be suppressed in gas exhaust manifold 9, consequently, the Abgassensor 19 that is assemblied in gas exhaust manifold 9 can be protected.
Fig. 8 is the plan view that the upstream side passage portion 14 of the exhaust gas recirculation path 13 of the 2nd mode of execution of the exhaust gas recirculation device of mobile engine of the present invention is shown.The exhaust gas recirculation device of the exhaust gas recirculation device of present embodiment and above-mentioned the 1st mode of execution is similar.Therefore, equal constitutive requirements are accompanied by equal reference character and description is omitted.The main composition of the mobile engine of present embodiment is identical with Fig. 1～Fig. 4 of above-mentioned the 1st mode of execution.In addition, the main composition of the exhaust gas recirculation path 13 of present embodiment is identical with Fig. 5, Fig. 6 of above-mentioned the 1st mode of execution.
In the exhaust gas recirculation path 13 of present embodiment, the formation in upstream side passage portion 14 changes to the formation of Fig. 8 from the formation of Fig. 7 of above-mentioned the 1st mode of execution.In this upstream side passage portion 14, for the 1st outstanding wall 21 of above-mentioned relief opening 7 side ends, between the 1st outstanding wall 21 and connection mouth 20, form the 2nd outstanding wall 24, between the 2nd outstanding wall 24 and connection mouth 20, form the 3rd outstanding wall 25.Wherein, the 2nd outstanding wall 24 towards the outstanding formation in bottom surface 22, has predefined gap from the ceiling face 23 of upstream side passage portion 14 between the 2nd outstanding wall 24 and bottom surface 22.In addition, the 3rd outstanding wall 25 towards the outstanding formation of ceiling face 23, has predefined gap from the bottom surface 22 of upstream side passage portion 14 between the 3rd outstanding wall 25 and ceiling face 23.And, the underpart of the 2nd outstanding wall 24 is set in to the position lower than the upper end portion of the 1st outstanding wall 21, the upper end portion of the 3rd outstanding wall 25 is set in to the position higher than the underpart of the 2nd outstanding wall 24.
Form multiple outstanding walls 21,24,25 by giving prominence to like this alternately, can be at the interior formation labyrinth structure of upstream side passage portion 14.Therefore,, by the mobile labyrinth-like that is made as with the condensed water shown in hollow arrow in Fig. 8, can suppress condensed water and be introduced into relief opening 7.Therefore, condensed water sputtering can be suppressed in gas exhaust manifold 9, consequently, the Abgassensor 19 that is assemblied in gas exhaust manifold 9 can be protected.Particularly, as in this embodiment, form groove part 16 and form upstream side passage portion 14 at (another) end face of the direction of intersecting with bank of cylinder of cylinder head 2, being easy to form staggered outstanding wall 21,24,25 as above.
In addition, in the present embodiment, make the face of a side contrary with relief opening 7 of the 1st outstanding wall 21, the 2nd outstanding wall 24 and the 3rd outstanding wall 25 cave in and form concave curved surface 26.Thus, as shown in hollow arrow in Fig. 8, clash into the concave curved surface 26 of each outstanding wall 21,24,25 and turn back in the other direction at the interior condensed water to relief opening 7 side shiftings of upstream side passage portion 14, i.e. downstream side passage portion 15 directions, can suppress condensed water and be introduced into relief opening 7 from upstream side passage portion 14.Therefore, condensed water sputtering can be suppressed in gas exhaust manifold 9, consequently, the Abgassensor 19 that is assemblied in gas exhaust manifold 9 can be protected.
Fig. 9 is the plan view that the upstream side passage portion 14 of the exhaust gas recirculation path 13 of the 3rd mode of execution of the exhaust gas recirculation device of mobile engine of the present invention is shown.The exhaust gas recirculation device of the exhaust gas recirculation device of present embodiment and above-mentioned the 1st mode of execution is similar.Therefore, equal constitutive requirements are accompanied by equal reference character and description is omitted.The main composition of the mobile engine of present embodiment is identical with Fig. 1～Fig. 4 of above-mentioned the 1st mode of execution.In addition, the main composition of the exhaust gas recirculation path 13 of present embodiment is identical with Fig. 5, Fig. 6 of above-mentioned the 1st mode of execution.
In the exhaust gas recirculation path 13 of present embodiment, in the bottom surface 22 of upstream side passage portion 14, between the 1st outstanding wall 21 and connection mouth 20, form the groove 27 of depression downwards.Thus, as shown in hollow arrow in this figure, condensed water accumulates in groove 27, can suppress condensed water and be introduced into relief opening 7 from upstream side passage portion 14.Therefore, condensed water sputtering can be suppressed in gas exhaust manifold 9, consequently, the Abgassensor 19 that is assemblied in gas exhaust manifold 9 can be protected.
Claims (9)
1. an exhaust gas recirculation device with the mobile engine of multiple cylinders, comprises:
Intake manifold, an end of its direction of intersecting with bank of cylinder that is assemblied in cylinder head, is connected with the suction port of each cylinder;
Gas exhaust manifold, the other end of its direction of intersecting with above-mentioned bank of cylinder that is assemblied in above-mentioned cylinder head, is connected with the relief opening of above-mentioned each cylinder;
Abgassensor, it is assemblied in above-mentioned gas exhaust manifold, detects the waste gas of discharging from above-mentioned relief opening;
Exhaust gas recirculation path, it is formed at above-mentioned cylinder head, and a part for the waste gas of the above-mentioned relief opening that makes to flow through is back to above-mentioned suction port or above-mentioned intake manifold;
Upstream side passage portion, it forms above-mentioned exhaust gas recirculation path, the other end side in the direction of intersecting with above-mentioned bank of cylinder of above-mentioned cylinder head forms towards bank of cylinder direction from above-mentioned relief opening, and the bottom surface of above-mentioned upstream side passage portion is along with the step-down away from above-mentioned exhaust side;
Downstream side passage portion, it forms above-mentioned exhaust gas recirculation path, is connected with above-mentioned upstream side passage portion, forms the water quench being cooled in water passage towards the direction of intersecting with above-mentioned bank of cylinder; And
Outstanding wall, it is formed at the exhaust side end of above-mentioned upstream side passage portion, gives prominence to and has predefined gap with respect to above-mentioned ceiling mask from above-mentioned bottom surface towards ceiling face.
2. the exhaust gas recirculation device of mobile engine according to claim 1,
The upper end portion of above-mentioned outstanding wall is set in to the position of the kernel of section of the above-mentioned relief opening connecting higher than above-mentioned upstream side passage portion.
3. the exhaust gas recirculation device of mobile engine according to claim 2,
The upper end portion of above-mentioned outstanding wall is set in to the position higher than the upper end portion of the connection mouth of above-mentioned upstream side passage portion and above-mentioned downstream side passage portion.
4. the exhaust gas recirculation device of mobile engine according to claim 3,
The sectional area of above-mentioned upstream side passage portion is more larger away from above-mentioned outstanding wall.
5. the exhaust gas recirculation device of mobile engine according to claim 4,
Above-mentioned outstanding wall is in the situation of the 1st outstanding wall, between the above-mentioned the 1st outstanding wall of above-mentioned upstream side passage portion and above-mentioned connection mouth, form from above-mentioned ceiling facing to the 2nd outstanding outstanding wall of above-mentioned bottom surface, the underpart of the above-mentioned the 2nd outstanding wall is set in to the position lower than the upper end portion of the above-mentioned the 1st outstanding wall.
6. the exhaust gas recirculation device of mobile engine according to claim 5,
Make the face of at least either party's of the above-mentioned the 1st outstanding wall and the above-mentioned the 2nd outstanding wall a side contrary with above-mentioned relief opening cave in and form concave curved surface.
7. the exhaust gas recirculation device of mobile engine according to claim 3,
Above-mentioned outstanding wall is in the situation of the 1st outstanding wall, between the above-mentioned the 1st outstanding wall of above-mentioned upstream side passage portion and above-mentioned connection mouth, form from above-mentioned ceiling facing to the 2nd outstanding outstanding wall of above-mentioned bottom surface, the underpart of the above-mentioned the 2nd outstanding wall is set in to the position lower than the upper end portion of the above-mentioned the 1st outstanding wall.
8. the exhaust gas recirculation device of mobile engine according to claim 7,
Make the face of at least either party's of the above-mentioned the 1st outstanding wall and the above-mentioned the 2nd outstanding wall a side contrary with above-mentioned relief opening cave in and form concave curved surface.
9. the exhaust gas recirculation device of mobile engine according to claim 3,
In the above-mentioned bottom surface of above-mentioned upstream side passage portion, between above-mentioned outstanding wall and above-mentioned connection mouth, form the groove of depression downwards.
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 true CN103912411A (en) | 2014-07-09 |
| CN103912411B 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) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN110985229A (en) * | 2018-10-02 | 2020-04-10 | 本田技研工业株式会社 | Cover structure of engine |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7296251B2 (en) * | 2019-05-31 | 2023-06-22 | ダイハツ工業株式会社 | EGR device for internal combustion engine |
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| US9810180B2 (en) * | 2010-10-28 | 2017-11-07 | Honda Motor Co., Ltd. | EGR cooling structure |
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2012
- 2012-12-28 JP JP2012288966A patent/JP6040771B2/en active Active
-
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- 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 (5)
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| JPH0447155A (en) * | 1990-06-13 | 1992-02-17 | Hino Motors Ltd | Electronic control device for exhaust gas recirculation |
| US20020005190A1 (en) * | 2000-05-12 | 2002-01-17 | Pietro Bianchi | Internal-combustion engine provided with an exhaust gas recirculation system, in particular for a vehicle |
| 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 |
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| CN110985229A (en) * | 2018-10-02 | 2020-04-10 | 本田技研工业株式会社 | Cover structure of engine |
| CN110985229B (en) * | 2018-10-02 | 2021-08-24 | 本田技研工业株式会社 | Cover structure of engine |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6040771B2 (en) | 2016-12-07 |
| JP2014129801A (en) | 2014-07-10 |
| DE102013224946A1 (en) | 2014-07-03 |
| CN103912411B (en) | 2016-09-07 |
| DE102013224946B4 (en) | 2019-10-31 |
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