CN103527358A - Engine and air inlet elbow of engine - Google Patents
Engine and air inlet elbow of engine Download PDFInfo
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- CN103527358A CN103527358A CN201310450995.7A CN201310450995A CN103527358A CN 103527358 A CN103527358 A CN 103527358A CN 201310450995 A CN201310450995 A CN 201310450995A CN 103527358 A CN103527358 A CN 103527358A
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Abstract
The invention discloses an engine and an air inlet elbow of the engine. The air inlet elbow is provided with an air inlet end, an air outlet end and an air inlet connector. An air inlet bending corner is formed at the position, close to the air inlet end, of an elbow body of the air inlet elbow, an air outlet bending corner is formed at the position, close to the air outlet end, of the elbow body of the air inlet elbow, and the size in the height direction of the cross section of the air outlet bending corner is smaller than the size in the transverse direction of the cross section of the air outlet bending corner. According to the air inlet elbow of the structure, air flow can be squeezed out from inside to outside, the air pressure of air on the inner side of the air outlet bending corner can be increased, the flow speed can be reduced, the flow speed difference and the pressure difference between the air flow on the inner side and the air flow on the outer side are accordingly reduced, the air flow smooth performance after waste air and fresh air are mixed is guaranteed, and energy losses of the inlet air are reduced; furthermore, in the process that the air flow is squeezed from the inner side to the outer side, the mixing effect of the air is strengthened to a certain degree; in addition, the bending radius of the air outlet bending corner of the air inlet elbow can be reduced, and therefore the air inlet elbow can also be smoothly arranged in the installation environment with limited space.
Description
Technical field
The present invention relates to technical field of engines, particularly a kind of motor and intake elbow thereof.
Background technique
EGR (exhaust gas recirculation), gas recirculation system, can be recycled to suction tude by the part waste gas of motor discharge, and again enter cylinder after mixing with fresh air.In waste gas, contain a large amount of carbon dioxide, carbon dioxide does not burn and but can siphon away a large amount of heat, thus can make the combustion temperature of mixed gas in cylinder reduce, thus reduce the growing amount of nitrogen oxide.
For reaching this object, engine system is provided with intake elbow, and intake elbow has inlet end, outlet side and intake interface, and inlet end is communicated with external environment condition; Intake interface is communicated with waste pipe, and general intake interface is communicated with in the following manner with engine exhaust pipe: outlet pipe-EGR valve-cooler for recycled exhaust gas-EGR steam outlet pipe-intake interface; Outlet side is communicated with the suction tude of motor.After the fresh air that waste gas of outlet pipe enters with inlet end place mixes in intake elbow, in outlet side enters the suction tude of motor, and finally enter cylinder.
Intake elbow is generally provided with bent angle, and to be adapted to the installation environment of motor, a kind of bent angle set-up mode is that two place's bent angles are set on body, and place's bent angle is near inlet end, and another place's bent angle is near outlet side.In addition, the cross section of intake elbow is generally circular.
Yet there is following technical problem in technique scheme:
The first, intake elbow is circular winding pipe, its corner, two places also all adopts regular circular cross-section design, gas is when flowing through corner, based on Curvature change, can produce that gas atmosphere is lower inside bent angle, flow velocity is very fast, and the phenomenon that outside bent angle, gas atmosphere is higher, flow velocity is slower, this causes intake elbow larger at corner current difference and pressure difference, find expression in while giving vent to anger corner, can affect air-flow smoothness, air inlet energy loss is larger;
The second, the caliber of intake elbow is larger, need larger bending radius, but the arrangement space of intake elbow is limited, causes intake elbow to be difficult to install;
The 3rd, in order to strengthen the mixing of fresh air and waste gas, the longer intake elbow of general employing, or at intake interface place, increase waste gas honeycomb duct.Longer intake elbow, easy and miscellaneous part is interfered, and is unfavorable for the integral arrangement of motor; And waste gas honeycomb duct is set, and can hinder entering of fresh air, be unfavorable for the fuel economy of motor.
In view of this, how improving intake elbow, guarantee that air-flow is smooth-going, reduce air inlet energy loss, is those skilled in the art's technical problems urgently to be resolved hurrily.
Summary of the invention
For solving the problems of the technologies described above, object of the present invention is for providing a kind of motor and intake elbow thereof, and this intake elbow can guarantee that air-flow is smooth-going, reduces air inlet energy loss.
Intake elbow provided by the invention, there is inlet end, outlet side and intake interface, and its body forms air inlet bent angle, forms near described outlet side the bent angle of giving vent to anger near described inlet end, described in the give vent to anger short transverse size of bent angle cross section be less than transverse dimension.
So, the bent angle of giving vent to anger of intake elbow is equivalent to be designed to " flat-shaped " structure, when in regular shape body, mobile airflow passes is given vent to anger corner, the air pressure of sidewind in bent angle of giving vent to anger has rising trend, and the variation of cross section, make the interior sidewind with the trend of boosting be subject to mandatory outer squeezing, flow laterally.
Therefore the intake elbow of this structure can produce following technique effect:
The first, the air-flow causing just because of flat-shaped design is extruded from inside to outside, can increase gas atmosphere inside the corner of giving vent to anger, reduce flow velocity; And the give vent to anger bending radius of corner of intake elbow can reduce, and has correspondingly reduced outside gas atmosphere, has improved flow velocity.Compared to inner side gas atmosphere is lower in background technique, flow velocity is very fast, the phenomenon that outside gas atmosphere is higher, flow velocity is slower, this programme obviously can reduce current difference and the pressure difference of medial and lateral air-flow, thereby guarantee waste gas and the mixed air-flow smoothness of fresh air, can gently enter the suction tude of motor, reduce the energy loss of air inlet;
The second, air-flow, in the process of pushing laterally from inner side, has been strengthened the mixed effect of gas to a certain extent;
Three, give vent to anger corner bending radius reduce except reducing outside gas atmosphere, improve flow velocity, also make intake elbow also can arrange smoothly at the installation environment of limited space; In addition, " flat-shaped " design be equivalent to make to give vent to anger inside portion of corner is exceptionally crowded, has relatively expanded installing space, is convenient to other component and arranges.
Preferably, the inner side portion size that the bent angle cross section of giving vent to anger described in is corresponding is less than corresponding external lateral portion size.
Preferably, the cross section of bent angle of giving vent to anger described in is trapezoid shaped, the inner side of described trapezoidal top in the described bent angle of giving vent to anger, the outside of described trapezoidal bottom in the described bent angle of giving vent to anger.
Preferably, described trapezoidal drift angle, base angle all have rounding.
Preferably, described intake interface is arranged at described air inlet corner.
Preferably, described intake interface is arranged at the sidewall of described air inlet bent angle.
Preferably, described inlet end is provided with charge flow rate valve, and/or pressure, temperature transducer.
Preferably, described outlet side is provided with heater grid, and/or pressure, temperature transducer.
Preferably, described inlet end is described outlet side extremely, cross section convergent.
The present invention also provides a kind of motor, comprise outlet pipe, suction tude and intake elbow, described intake elbow is the intake elbow described in above-mentioned any one, the described inlet end of described intake elbow is communicated with outside air, described intake interface is communicated with described outlet pipe, and described outlet side is communicated with described suction tude.Because above-mentioned intake elbow has above-mentioned technique effect, there is this intake elbow motor and also there is identical technique effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of specific embodiment of intake elbow provided by the present invention;
Fig. 2 is the structural representation of another angle of intake elbow in Fig. 1;
Fig. 3 is that in Fig. 1, intake elbow inlet end is to the structural representation of the bent angle of giving vent to anger, and this illustrates the cross section of the corner of giving vent to anger;
Fig. 4 is the cross sectional representation of corner of giving vent to anger in Fig. 3, and arrow partly represents air-flow extruding trend laterally.
In Fig. 1-4:
10 intake elbows, 11 inlet ends, 12 air inlet bent angles, 13 intake interfaces, 14 give vent to anger bent angle, 15 outlet sides
Embodiment
In order to make those skilled in the art understand better technological scheme of the present invention, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 1-2, Fig. 1 is the structural representation of a kind of specific embodiment of intake elbow provided by the present invention; Fig. 2 is the structural representation of another angle of intake elbow in Fig. 1.
This intake elbow 10, there is inlet end 11, outlet side 15 and intake interface 13, inlet end 11 is for being communicated with outside air, outlet side 15 is for the suction tude of connecting engine, the outlet pipe of 13 connecting engines of intake interface, the waste gas that fresh air and outlet pipe are discharged can be sent in cylinder after mixing intake elbow 10 is interior.In addition, intake elbow 10 bodys, forming air inlet bent angle 12 near inlet end 11 places, forming near 15 places, outlet side the bent angle 14 of giving vent to anger, can be understood with reference to background technique.As shown in Figure 1, the bent angle 14 of giving vent to anger of intake elbow 10 is, the bending direction of air inlet bent angle 12 is roughly contrary.
This continues with reference to figure 3 and Fig. 4, and Fig. 3 is that in Fig. 1, intake elbow inlet end is to the structural representation of the bent angle of giving vent to anger, and this illustrates the cross section of the corner of giving vent to anger; Fig. 4 is the cross sectional representation of corner of giving vent to anger in Fig. 3, and arrow partly represents air-flow extruding trend laterally.
In the present embodiment, bent angle 14 cross sections of giving vent to anger are designed to: the size of cross-sectional height direction is less than the size of width direction.Herein, the give vent to anger direction in bent angle 14 inner sides to outside of short transverse, the horizontal i.e. direction vertical with short transverse, as shown in Figure 4, A represents short transverse, B represents laterally.
It should be noted that in addition, " inner side " described in literary composition, " outside " are the bending directions based on bent angle, towards bending direction, are inner side, deviate from the i.e. outside of bending direction.Take Fig. 4 as visual angle, and upside is inner side, and downside is outside.
So design, the bent angle 14 of giving vent to anger of intake elbow 10 is designed to " flat-shaped " structure, when in regular shape body (circle as shown in Figure 1), mobile airflow passes is given vent to anger bent angle 14 place, the air pressure of bent angle 14 interior sidewinds of giving vent to anger has rising trend, and the unique design of cross section herein, make the interior sidewind with the trend of boosting be subject to mandatory outer squeezing, flow laterally, extruding trend as described in Figure 4.Arrow part major embodiment inner side in figure is the trend of extruding laterally, and airflow direction is main still along body axial direction.
The intake elbow 10 of this structure can produce following technique effect:
The first, the air-flow causing just because of flat-shaped design is extruded from inside to outside, can increase gas atmosphere inside bent angle 14 places of giving vent to anger, reduce flow velocity; And the give vent to anger bending radius of corner of intake elbow can reduce, and has correspondingly reduced outside gas atmosphere, has improved flow velocity.Compared to inner side gas atmosphere is lower in background technique, flow velocity is very fast, the phenomenon that outside gas atmosphere is higher, flow velocity is slower, this programme obviously can reduce current difference and the pressure difference of medial and lateral air-flow, thereby guarantee waste gas and the mixed air-flow smoothness of fresh air, can gently enter the suction tude of motor, reduce the energy loss of air inlet;
The second, air-flow, in the process of pushing laterally from inner side, has been strengthened the mixed effect of gas to a certain extent;
Three, give vent to anger bent angle 14 place's bending radius reduce except reducing outside gas atmosphere, improve flow velocity, also make intake elbow 10 also can arrange smoothly at the installation environment of limited space; In addition, " flat-shaped " design be equivalent to make to give vent to anger inside portion at bent angle 14 places is exceptionally crowded, has relatively expanded installing space, is convenient to other component and arranges.
Seen from the above description, as long as the bent angle 14 of giving vent to anger is designed to " flat-shaped ", its inner side air-flow can be pushed laterally, can realize the object that reduces medial and lateral pressure difference and current difference.And that " flat-shaped " cross section specifically has is multiple, such as elliptic cross-section, long round section (rectangle with rounding), kidney-shaped cross section etc., exemplify no longer one by one herein.
For above-described embodiment, can also make further improvement, bent angle 14 cross sections of giving vent to anger can be designed to: the inner side portion size that cross section is corresponding is less than corresponding external lateral portion size.So design, has expansion trend laterally from inner side.
Take Fig. 3 as example, and in this embodiment, the cross section of the bent angle 14 of giving vent to anger is roughly trapezoid shaped, and the inner side of trapezoidal top in the bent angle 14 of giving vent to anger, and trapezoidal bottom is the outside in the bent angle 14 of giving vent to anger correspondingly.So design, is convenient to intake elbow 10 integral body and bends the bent angle 14 of giving vent to anger that formation has this kind of cross section.And, as mentioned above, air-flow is when the top of trapezoid cross section, can flow laterally, while being designed to trapezoid shaped, when air-flow flows laterally, can along trapezoidal waist limit to bottom, (outside) move, strengthened air-flow from inner side mobile trend laterally, thereby further reduce pressure difference and the speed difference of medial and lateral.
Further, trapezoidal drift angle, base angle can all process rounding, as shown in Figure 3,4.Rounding make on the one hand the to give vent to anger structure of bent angle 14 is comparatively level and smooth, can avoid stress to concentrate, and on the other hand, contributes to air-flow to flow at the smooth-going of bent angle 14 places of giving vent to anger, and reduces flowed energy loss.
For the various embodiments described above, the intake interface 13 of intake elbow 10 can be arranged at its air inlet bent angle 12 places, as shown in Figure 1, 2.As described in the background section, the radial dimension of intake elbow 10 cross sections is roughly suitable, such as being typically designed to circle (also can be set to square under a few cases), inside also existing at air inlet bent angle 12 places, air pressure is low, flow velocity is fast, the phenomenon that outside air pressure is high, flow velocity is slow, is arranged at air inlet bent angle 12 places by intake interface 13 and just can utilizes air inlet bent angle 12 places larger medial and lateral pressure difference and current difference.Because medial and lateral pressure difference and current difference can be accelerated flow perturbation, this can successfully enter in intake elbow 10 waste gas in outlet pipe.
On the other hand, based on flow perturbation, waste gas, when intake interface 13 enters, can fully mix with the waste gas entering from inlet end 11 at air inlet bent angle 12 places, thereby waste gas and the fresh air mixing is provided.Also just therefore, the intake elbow 10 of this structure is longer without arranging, or increases honeycomb duct, has also just eliminated the difficult layout described in background technique, has hindered the technical problems such as fresh air enters.
Visible, in this embodiment, due to larger pressure difference, current difference, waste gas can enter intake elbow 10 smoothly, and fully mixes at air inlet bent angle 12 places with fresh air, mixed gas after mixing the giving vent to anger during bent angle 14 of " flat-shaped " of flowing through, because air-flow is squeezed, can further improve mixed effect, and eliminate the adverse effect that while running into bent angle in air-flow running, pressure difference, current difference bring, enter smooth-going flowing state, reduce air inlet energy loss.Therefore intake interface 13 is arranged at air inlet bent angle 12, and the bent angle 14 of giving vent to anger is designed to " flat-shaped " structure, makes the performance of this intake elbow 10 be able to optimization.
Particularly, intake interface 13 can be arranged at the sidewall of air inlet bent angle 12, and as shown in Figure 1, air inlet bent angle 12, except inner side, outside, also comprises both sides sidewall.Intake interface 13 is so set, is convenient to actual processing, and be not easy to other component and interfere.Certainly, other positions that intake interface 13 is arranged at air inlet bent angle 12 places are also feasible, such as being arranged at inner side or the outside of air inlet bent angle 12.
For the various embodiments described above, can also charge flow rate valve be set at the inlet end 11 of intake elbow 10.Charge flow rate valve can detect the fresh air flow entering in intake elbow 10, and exports master controller to, to control fresh air inlet according to actual conditions.Can expect, also can EGR valve be set at intake interface 13 places, to control waste gas inlet.
Can also pressure and/or temperature transducer be set at inlet end 11 places, to detect pressure and/or the temperature of fresh air, export equally master controller to, participate in the analysis of whole system.
In like manner, also can pressure and/or temperature transducer be set in the outlet side 15 of intake elbow 10, to detect pressure and/or the temperature of outlet port mixed gas, for system analysis.In addition, also can heater grid be set in the outlet side 15 of intake elbow 10, heater grid can heat 15 mixed gass that flow out from outlet side, so that possess the mixed gas of uniform temperature, enters cylinder, meets operating mode demand.Especially during cold start-up, the rre-heated of heater grid contributes to the quick startup of motor.
For the various embodiments described above, intake elbow 10 can be designed to: inlet end 11 is to outlet side 15, cross section convergent.As shown in Figure 1, 2, the cross-section area of inlet end 11 is not less than the cross-section area of the bent angle 14 of giving vent to anger, and the cross-section area of the bent angle 14 of giving vent to anger is not less than the cross-section area of outlet side 15.So design, is conducive to waste gas on the one hand and fresh air enters intake elbow 10 smoothly, and strengthens to outlet side 15 mobile trend, on the other hand, contributes to the mixed effect in the intake elbow 10 of waste gas and fresh air.
Except above-mentioned intake elbow 10, the present invention also provides a kind of motor, comprise outlet pipe, suction tude and intake elbow 10, described intake elbow 10 is the intake elbow 10 described in above-mentioned arbitrary embodiment, its intake interface 13 is communicated with outlet pipe, inlet end 11 is communicated with outside air, and outlet side 15 is communicated with suction tude.Because above-mentioned intake elbow 10 has above-mentioned technique effect, the motor with this intake elbow 10 also has identical technique effect, repeats no more herein.
Above a kind of motor provided by the present invention and intake elbow thereof are all described in detail.Applied specific case herein principle of the present invention and mode of execution are set forth, above embodiment's explanation is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of the claims in the present invention.
Claims (10)
1. an intake elbow, there is inlet end (11), outlet side (15) and intake interface (13), and its body forms air inlet bent angle (12), near described outlet side (15), forms the bent angle (14) of giving vent to anger near described inlet end (11), it is characterized in that, described in the give vent to anger short transverse size of bent angle (14) cross section be less than transverse dimension.
2. intake elbow as claimed in claim 1, is characterized in that, described in inner side portion size corresponding to bent angle (14) cross section of giving vent to anger be less than corresponding external lateral portion size.
3. intake elbow as claimed in claim 2, it is characterized in that, the cross section of the described bent angle of giving vent to anger (14) is trapezoid shaped, the inner side of described trapezoidal top in the described bent angle of giving vent to anger (14), the outside of described trapezoidal bottom in the described bent angle of giving vent to anger (14).
4. intake elbow as claimed in claim 3, is characterized in that, described trapezoidal drift angle, base angle all have rounding.
5. the intake elbow as described in claim 1-4 any one, is characterized in that, described intake interface (13) is arranged at described air inlet bent angle (12) and locates.
6. intake elbow as claimed in claim 5, is characterized in that, described intake interface (13) is arranged at the sidewall of described air inlet bent angle (12).
7. the intake elbow as described in claim 1-4 any one, is characterized in that, described inlet end (11) is provided with charge flow rate valve, and/or pressure, temperature transducer.
8. the intake elbow as described in claim 1-4 any one, is characterized in that, described outlet side (15) are provided with heater grid, and/or pressure, temperature transducer.
9. the intake elbow as described in claim 1-4 any one, is characterized in that, described inlet end (11) is described outlet side (15) extremely, cross section convergent.
10. a motor, comprise outlet pipe, suction tude and intake elbow (10), it is characterized in that, described intake elbow (10) is the intake elbow (10) described in claim 1-9 any one, the described intake interface (13) of described intake elbow (10) is communicated with described outlet pipe, described inlet end (11) is communicated with outside air, and described outlet side (15) are communicated with described suction tude.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310450995.7A CN103527358B (en) | 2013-09-27 | 2013-09-27 | A kind of engine and intake elbow thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310450995.7A CN103527358B (en) | 2013-09-27 | 2013-09-27 | A kind of engine and intake elbow thereof |
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| CN103527358A true CN103527358A (en) | 2014-01-22 |
| CN103527358B CN103527358B (en) | 2016-05-11 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105370360A (en) * | 2015-10-21 | 2016-03-02 | 安徽江淮汽车股份有限公司 | Intake manifold and exhaust system mounting structure |
| CN109958555A (en) * | 2019-05-07 | 2019-07-02 | 一汽解放汽车有限公司 | A kind of use for diesel engine simple and efficient EGR mixing arrangement |
| CN110296843A (en) * | 2019-05-07 | 2019-10-01 | 东风汽车集团有限公司 | Pressure difference simulator and connection structure |
| CN114542335A (en) * | 2022-02-26 | 2022-05-27 | 重庆长安汽车股份有限公司 | Low-pressure EGR (exhaust gas recirculation) mixed structure of gasoline supercharged engine |
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| CN114542335A (en) * | 2022-02-26 | 2022-05-27 | 重庆长安汽车股份有限公司 | Low-pressure EGR (exhaust gas recirculation) mixed structure of gasoline supercharged engine |
| CN114542335B (en) * | 2022-02-26 | 2023-09-08 | 重庆长安汽车股份有限公司 | Low-pressure EGR (exhaust gas recirculation) mixing structure of gasoline supercharged engine |
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|---|---|
| CN103527358B (en) | 2016-05-11 |
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