CN113153507B - Integrated exhaust manifold and engine with same - Google Patents
Integrated exhaust manifold and engine with same Download PDFInfo
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- CN113153507B CN113153507B CN202010679829.4A CN202010679829A CN113153507B CN 113153507 B CN113153507 B CN 113153507B CN 202010679829 A CN202010679829 A CN 202010679829A CN 113153507 B CN113153507 B CN 113153507B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/10—Other arrangements or adaptations of exhaust conduits of exhaust manifolds
- F01N13/107—More than one exhaust manifold or exhaust collector
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Abstract
The invention discloses an integrated exhaust manifold and an engine with the same, wherein the integrated exhaust manifold is integrated on a cylinder cover of the engine and comprises: the exhaust ends of the multiple groups of cylinder exhaust pipes are converged into one exhaust port, at least one group of cylinder exhaust pipes comprises a first manifold and a second manifold, a central streamline n1 of the first manifold is located on the outer side of a central streamline n2 of the second manifold, a plane perpendicular to the central streamline n1 of the first manifold is taken as a reference plane, an intersection point of the reference plane and the central streamline n1 of the first manifold is taken as a point a, an intersection point of the reference plane and the central streamline n2 of the second manifold is taken as a point b, and the distance between the point a and the cylinder head is larger than the distance between the point b and the cylinder head. According to the integrated exhaust manifold, the flow resistance of the airflow at the junction of the first manifold and the second manifold is reduced, the energy utilization rate of high-temperature exhaust gas is improved, and the exhaust performance of the integrated exhaust manifold is improved.
Description
Technical Field
The invention relates to the technical field of engines, in particular to an integrated exhaust manifold and an engine with the same.
Background
At present, emission regulations of automobiles are more and more strict, and the competitive pressure of the automobile market is more and more increased; in order to meet the emission requirement and reduce the production cost of the whole machine, the cylinder cover integrated exhaust manifold technology is developed. The technology can control the exhaust temperature within the acceptable temperature limit value of the system components after exhaust on the premise of no enrichment or light enrichment in the high-speed and high-load operation area of the engine. Compared with the prior method of limiting the exhaust temperature by only depending on the enriched mixture, the integrated exhaust manifold can reduce the oil consumption by 10-30% in the working area, and is one of the measures for reducing the carbon emission of the engine. Meanwhile, the cylinder cover of the engine is integrated with the exhaust manifold, so that the traditional exhaust manifold is omitted, the production cost is greatly saved, and the competitiveness of the product is improved.
However, in the design of the integrated exhaust manifold in the related art, the space arrangement, the low energy utilization rate of the high-temperature exhaust gas and the poor exhaust performance of the integrated exhaust manifold are mainly considered.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides an integrated exhaust manifold, which is beneficial to reducing the flow resistance of airflow at the junction of a first manifold and a second manifold, and improving the energy utilization rate of high-temperature exhaust gas, thereby improving the exhaust performance of the integrated exhaust manifold.
The invention also provides an engine with the integrated exhaust manifold.
According to an embodiment of the present invention, an integrated exhaust manifold integrated on a cylinder head of an engine, the integrated exhaust manifold comprises: the exhaust end of the cylinder exhaust pipe is converged into an exhaust port, at least one group of cylinder exhaust pipe comprises a first manifold and a second manifold, the first manifold and the second manifold are converged into an exhaust channel, the central flow line of the first manifold is positioned on the outer side of the central flow line of the second manifold, the exhaust port is perpendicular to the plane of the central flow line of the first manifold as a reference plane, the intersection point of the reference plane and the central flow line of the first manifold is a point a, the intersection point of the reference plane and the central flow line of the second manifold is a point b, and the distance between the point a and the cylinder cover is greater than the distance between the point b and the cylinder cover.
According to the integrated exhaust manifold provided by the embodiment of the invention, the central flow line of the first manifold is positioned at the outer side of the central flow line of the second manifold, and the distance between the point a and the cylinder cover is greater than the distance between the point b and the cylinder cover, so that the overlapping of the cross sections of the junction of the first manifold and the second manifold is reduced, the mutual interference of airflows in the first manifold and the second manifold is reduced, the flow resistance of the junction is reduced, the energy utilization rate of high-temperature exhaust gas is improved, the exhaust performance of the integrated exhaust manifold is improved, and the product competitiveness is improved.
In some embodiments of the present invention, the first manifold includes a first branch section, a first merging transition section, and a first merging section that are sequentially arranged in a flow direction of the gas flow, and the second manifold includes a second branch section, a second merging transition section, and a second merging section that are sequentially arranged in the flow direction of the gas flow, with a gap between the first branch section and the second branch section.
In some embodiments of the present invention, with the reference plane passing through the first and second pipe sections as a first reference plane, the intersection point of the first reference plane and the central flow line of the first pipe section is a point a1, the intersection point of the first reference plane and the central flow line of the second pipe section is a point b1, the height difference between the point a1 and the point b1 is H1, with the reference plane passing through the first and second converging transition sections as a second reference plane, the intersection point of the second reference plane and the central flow line of the first converging transition section is a point a2, the intersection point of the second reference plane and the central flow line of the second converging transition section is a point b2, the height difference between the point a2 and the point b2 is H2, H1, H2 satisfy: h1 > H2.
In some embodiments of the present invention, with the reference plane passing through the first merging section and the second merging section as a third reference plane, an intersection point of the third reference plane and a central streamline of the first merging section is a point a3, an intersection point of the third reference plane and the central streamline of the second merging section is a point b3, a height difference between the point a3 and the point b3 is H3, and H1, H2 and H3 satisfy: h1 > H2 > H3.
In some embodiments of the invention, the rate of change of curvature of the center flow line of the first manifold is less than the rate of change of curvature of the center flow line of the second manifold.
In some embodiments of the invention, the curvature K1 at a1 and the curvature K2 at b1 satisfy: 1 < K2/K1 < 3.
In some embodiments of the invention, the downstream end of the first pipe section and the downstream end of the second pipe section are connected by a transition structure, the transition structure extending in the flow direction of the gas flow away from the central streamline of the first pipe section, the transition structure having a curvature greater than the curvature of the connection of the first pipe section with the transition structure.
In some embodiments of the present invention, a cross section of the first manifold on the reference plane is formed in an elliptical shape, a cross section of the second manifold on the reference plane is formed in an elliptical shape, and the cross section of the first manifold on the reference plane and the cross section of the second manifold on the reference plane are asymmetrically arranged.
In some embodiments of the present invention, the cylinder exhaust pipes are four and are respectively a first cylinder exhaust pipe, a second cylinder exhaust pipe, a third cylinder exhaust pipe and a fourth cylinder exhaust pipe arranged in this order, and the exhaust port is located between the second cylinder exhaust pipe and the third cylinder exhaust pipe.
An engine according to an embodiment of the present invention includes: a cylinder head and the integrated exhaust manifold described above.
According to the engine provided by the embodiment of the invention, the integrated exhaust manifold is arranged, so that the overlapping of the cross sections of the junction of the first manifold and the second manifold is reduced, and the mutual interference of airflows in the first manifold and the second manifold is reduced, thereby reducing the flow resistance of the junction, improving the energy utilization rate of high-temperature waste gas, further improving the exhaust performance of the integrated exhaust manifold, and further being beneficial to improving the overall performance of the engine.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
FIG. 1 is a schematic diagram of an exhaust manifold according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view at A in FIG. 1;
FIG. 3 is a schematic view of a cross-section taken at first reference plane m1 in FIG. 2;
FIG. 4 is a schematic view of a cross-section taken at a second reference plane m2 in FIG. 2;
fig. 5 is a schematic view of a cross section taken on a third reference plane m3 in fig. 2.
Reference numerals:
an integrated exhaust manifold 100;
a cylinder exhaust pipe 1; a first cylinder exhaust pipe 11; a second cylinder exhaust pipe 12; a third cylinder exhaust pipe 13; a fourth cylinder exhaust pipe 14; an exhaust port 15;
a first manifold 2; a first section 21; a first converging transition section 22; a first merging section 23;
a second manifold 3; a second pipe section 31; a second converging transition section 32; a second merging section 33;
an exhaust passage 4;
a transition structure 5.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the applicability of other processes and/or the use of other materials.
Referring to fig. 1, according to the integrated exhaust manifold 100 of the embodiment of the present invention, the integrated exhaust manifold 100 is integrated on a cylinder head of an engine (not shown), the integrated exhaust manifold 100 includes a plurality of cylinder exhaust pipes 1, exhaust ends of the plurality of cylinder exhaust pipes 1 converge into one exhaust port 15, at least one cylinder exhaust pipe 1 includes a first manifold 2 and a second manifold 3, the first manifold 2 and the second manifold 3 converge into one exhaust passage 4, a central flow line n1 of the first manifold 2 is located outside a central flow line n2 of the second manifold 3, it should be noted that a direction away from the center of the integrated exhaust manifold 100 is outward, and a direction close to the center of the integrated exhaust manifold 100 is inward, in other words, the central flow line n1 of the first manifold 2 is located on a side of the central flow line n2 of the second manifold 3 away from the center of the integrated exhaust manifold 100.
For example, as shown in fig. 1, the cylinder exhaust pipes 1 are four and are respectively a first cylinder exhaust pipe 11, a second cylinder exhaust pipe 12, a third cylinder exhaust pipe 13 and a fourth cylinder exhaust pipe 14 which are sequentially arranged, the downstream end of each cylinder exhaust pipe 1 includes two branch pipes, the engine has four cylinders, each cylinder is provided with two exhaust valves, the two exhaust valves of each cylinder are respectively communicated with the starting ends of the two branch pipes of the corresponding cylinder exhaust pipe 1, the two branch pipes converge into one exhaust passage 4, and the exhaust ends of the four cylinder exhaust pipes 1 converge into one exhaust port 15.
The cylinder exhaust pipe 1 shown in the present embodiment is exemplified by the first cylinder exhaust pipe 11 located on the leftmost side, and the second cylinder exhaust pipe 12, the third cylinder exhaust pipe 13, and the fourth cylinder exhaust pipe 14 may be provided with reference to the first cylinder exhaust pipe 11. The cylinder exhaust pipe 1 positioned at the leftmost side comprises a first manifold 2 and a second manifold 3, the first manifold 2 and the second manifold 3 converge into an exhaust channel 4, and a central flow line n1 of the first manifold 2 is positioned outside a central flow line n2 of the second manifold 3. It can be understood that, when the integrated exhaust manifold 100 is in operation, the branch pipes on the same cylinder are first converged into one exhaust passage 4, then the four exhaust passages 4 are converged into the exhaust port 15, and finally flow to the scroll machine of the supercharger (not shown) through the exhaust port 15.
Referring to fig. 2 to 5, a plane perpendicular to the central streamline n1 of the first manifold 2 is taken as a reference plane, the intersection point of the reference plane and the central streamline n1 of the first manifold 2 is taken as a point a, the intersection point of the reference plane and the central streamline n2 of the second manifold 3 is taken as a point b, and the distance between the point a and the cylinder head is greater than the distance between the point b and the cylinder head.
It can be understood that, by making the central streamline n1 of the first manifold 2 outside the central streamline n2 of the second manifold 3, and making the distance between the point a and the cylinder head larger than the distance between the point b and the cylinder head, it is beneficial to reduce the overlap of the cross section of the junction of the first manifold 2 and the second manifold 3, reduce the mutual interference of the air flows in the first manifold 2 and the second manifold 3, thereby reducing the flow resistance of the junction, improving the energy utilization rate of the high-temperature exhaust gas, and further improving the exhaust performance of the integrated exhaust manifold 100 and improving the product competitiveness.
In view of this, according to the integrated exhaust manifold 100 of the embodiment of the present invention, by positioning the central flow line n1 of the first manifold 2 outside the central flow line n2 of the second manifold 3, and positioning the distance between the point a and the cylinder head to be greater than the distance between the point b and the cylinder head, it is beneficial to reduce the overlap of the cross sections of the junction of the first manifold 2 and the second manifold 3, reduce the mutual interference of the airflows in the first manifold 2 and the second manifold 3, thereby reducing the flow resistance at the junction, improving the energy utilization rate of the high-temperature exhaust gas, and further improving the exhaust performance of the integrated exhaust manifold 100 and the product competitiveness.
In some embodiments of the present invention, as shown in fig. 2, the first manifold 2 includes a first branch section 21, a first merging transition section 22, and a first merging section 23, which are arranged in sequence in the flow direction of the gas flow, and the second manifold 3 includes a second branch section 31, a second merging transition section 32, and a second merging section 33, which are arranged in sequence in the flow direction of the gas flow, with a gap between the first branch section 21 and the second branch section 31.
It can be understood that, referring to fig. 1 and 2, the air flows in two exhaust valves of the same cylinder flow to the first merging transition section 22 and the second merging transition section 32 through the first branch pipe section 21 and the second branch pipe section 31 respectively, and gradually merge at the first merging transition section 22 and the second merging transition section 32, and finally flow into one exhaust passage 4 formed by the first merging section 23 and the second merging section 33 respectively, wherein, in the flow direction of the air flows, the central flow line of the first branch pipe section 21 is higher than the central flow line of the second branch pipe section 31, the central flow line of the first merging transition section 22 is higher than the central flow line of the second merging transition section 32, the central flow line of the first merging section 23 is higher than the central flow line of the second merging section 33, which is beneficial to reduce the overlapping of the cross sections at the junction of the first manifold 2 and the second manifold 3, and the air flows gradually merge when flowing through the first merging transition section 22 and the second merging transition section 32, mutual interference of the airflows in the first manifold 2 and the second manifold 3 can be further reduced, so that the flow resistance at the junction is reduced, the energy utilization rate of high-temperature exhaust gas is improved, and the exhaust performance of the integrated exhaust manifold 100 is improved.
In some alternative embodiments of the present invention, as shown in fig. 2 and 3, with the reference planes of the first and second pipe sections 21 and 31 as the first reference plane m1, the intersection point of the first reference plane m1 and the central streamline of the first pipe section 21 as the point a1, the intersection point of the first reference plane m1 and the central streamline of the second pipe section 31 as the point b1, and the height difference between the point a1 and the point b1 as the point H1, as shown in fig. 4, with the reference planes of the first converging transition section 22 and the second converging transition section 32 as the second reference plane m2, the intersection point of the second reference plane m2 and the central streamline of the first converging transition section 22 as the point a2, the intersection point of the second reference plane m2 and the central streamline of the second converging transition section 32 as the point b2, and the height difference between the point a2 and the point b2 as the point H2, H1, H2 satisfy: h1 > H2.
It can be understood that, by making H1 > H2, on one hand, the overlapping area of the same plane can be effectively reduced, the mutual influence of the exhaust gases in the first manifold 2 and the second manifold 3 can be reduced, and on the other hand, it can be ensured that the gas with higher flow speed at the center of the first manifold 2 and the second manifold 3 does not form obvious speed difference, which is beneficial to preventing the formation of cyclone, reducing the fluctuation of the gas flow, not affecting the flow capacity of the gas flow, reducing the energy loss of the gas flow, and improving the utilization rate of the gas flow.
In some alternative embodiments of the invention, H1 is no more than 50% of the exhaust valve diameter and no less than 20% of the exhaust valve diameter, in other words, H1 is between 20% and 50% of the exhaust valve diameter. For example, H1 may take on values of 21%, 25%, 30%, 35%, 40%, 45%, or 50% of the exhaust valve diameter, etc. Therefore, the difference between the flow rates of the air flows in the first pipe section 21 and the second pipe section 31 is not too large, the fluctuation of the air flows is reduced, and the forming difficulty is reduced.
Further, as shown in fig. 5, taking the reference planes of the first merging section 23 and the second merging section 33 as a third reference plane m3, the intersection point of the third reference plane m3 and the central streamline of the first merging section 23 as a point a3, the intersection point of the third reference plane m3 and the central streamline of the second merging section 33 as a point b3, the height difference between the point a3 and the point b3 is H3, and H1, H2 and H3 satisfy: h1 > H2 > H3. It can be understood that, by gradually decreasing H1, H2, and H3, it is beneficial to further ensure that the central high flow rate gas of the first manifold 2 and the second manifold 3 does not form an obvious speed difference, so as to reduce the fluctuation of the gas flow, not affect the flow capacity of the gas flow, reduce the energy loss of the gas flow, and improve the utilization rate of the gas flow.
In some embodiments of the present invention, and as illustrated with reference to FIG. 2, the rate of change of curvature of the central streamline n1 of the first manifold 2 is less than the rate of change of curvature of the central streamline n2 of the second manifold 3. For example, as shown in fig. 2, the curvature change of the first manifold 2 along the central streamline n1 is smooth, the curvature of the central streamline n1 of the first manifold 2 in the section from a1 to a3 is basically unchanged, the curvature change of the second manifold 3 along the central streamline n2 is obvious, and the central streamline n2 of the second manifold 3 is in a proportional trend. Therefore, the on-way pressure loss of the air flow in the first manifold 2 and the second manifold 3 is reduced, and the air flow is smoother.
In some embodiments of the invention, as shown in fig. 2, the curvature K1 at a1 and the curvature K2 at b1 satisfy: 1 < K2/K1 < 3. In other words, K2/K1 may take any value from 1 to 3. For example, K2/K1 can be 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 2.3, 2.5, 2.6, 2.7, 2.8, 2.9, and the like. Therefore, the curvature of the central streamline n1 near the position a1 is similar to that of the central streamline n2 near the position b1, and the curvature of the central streamline n2 near the position b1 is slightly larger, so that the on-way pressure loss of the air flow in the first manifold 2 and the second manifold 3 is further reduced, and the air flow is smoother to flow.
In some embodiments of the present invention, referring to fig. 2, the downstream end of the first pipe section 21 and the downstream end of the second pipe section 31 are connected by a transition structure 5, the transition structure 5 extends in the flow direction of the gas flow away from the central streamline of the first pipe section 21, and the curvature of the transition structure 5 is larger than the curvature of the connection of the first pipe section 21 and the transition structure 5. For example, as shown in fig. 2, the transition structure 5 is formed substantially in a circular arc shape, and the curvature of the transition structure 5 is greater than the curvature of the connection of the first pipe section 21 with the transition structure 5. It will be appreciated that the transition structure 5 has a significant uplifting effect on the gas flow from the first manifold section 21, and can direct the gas flow from the first manifold 2 upwardly, reducing the possibility of the gas flow from the first manifold 2 flowing back into the second manifold 3.
In some embodiments of the present invention, as shown in fig. 3 and 4, the cross section of the first manifold 2 on the reference plane is formed in an elliptical shape, the cross section of the second manifold 3 on the reference plane is formed in an elliptical shape, and the cross section of the first manifold 2 on the reference plane and the cross section of the second manifold 3 on the reference plane are asymmetrically arranged. For example. As shown in fig. 4, the cross section of the first manifold 2 on the second reference plane m2 is formed into an elliptical shape, the cross section of the second manifold 3 on the second reference plane m2 is formed into an elliptical shape, the height of the cross section at the junction of the first manifold 2 and the second manifold 3 is smaller than the length of the minor axis of the cross section of either elliptical shape, and the cross section of the first manifold 2 on the second reference plane m2 and the cross section of the second manifold 3 on the second reference plane m2 are asymmetrically arranged. Therefore, the overlapping of the cross sections of the junction is further reduced, and the mutual interference of the branch air flows is reduced.
In some embodiments of the present invention, as shown in fig. 1, the cylinder exhaust pipe 1 includes a first cylinder exhaust pipe 11, a second cylinder exhaust pipe 12, a third cylinder exhaust pipe 13, and a fourth cylinder exhaust pipe 14 arranged in this order, and an exhaust port 15 is located between the second cylinder exhaust pipe 12 and the third cylinder exhaust pipe 13. Thereby being beneficial to ensuring the exhaust consistency of each cylinder and improving the exhaust performance of the integrated exhaust manifold 100.
Referring to fig. 1, an engine according to an embodiment of the present invention includes: a cylinder head and an integrated exhaust manifold 100 according to the above-described embodiment of the present invention.
According to the engine provided by the embodiment of the invention, by arranging the integrated exhaust manifold 100 according to the above embodiment of the invention, the overlapping of the cross sections of the junction of the first manifold 2 and the second manifold 3 is reduced, and the mutual interference of the airflows in the first manifold 2 and the second manifold 3 is reduced, so that the flow resistance of the junction is reduced, the energy utilization rate of high-temperature exhaust gas is improved, the exhaust performance of the integrated exhaust manifold 100 is improved, and the overall performance of the engine is improved.
Other constructions and operations of engines according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. An integrated exhaust manifold (100), characterized in that the integrated exhaust manifold (100) is integrated on a cylinder head of an engine, the integrated exhaust manifold (100) comprising:
a plurality of cylinder exhaust pipes (1), the exhaust ends of the cylinder exhaust pipes (1) are converged into one exhaust port (15), at least one cylinder exhaust pipe (1) comprises a first manifold (2) and a second manifold (3), the first manifold (2) and the second manifold (3) are converged into one exhaust channel (4), a central flow line (n 1) of the first manifold (2) is positioned outside a central flow line (n 2) of the second manifold (3),
wherein, a plane perpendicular to a central streamline (n 1) of the first manifold (2) is taken as a reference plane, an intersection point of the reference plane and the central streamline (n 1) of the first manifold (2) is taken as a point a, an intersection point of the reference plane and the central streamline (n 2) of the second manifold (3) is taken as a point b, and the distance between the point a and the cylinder head is larger than that between the point b and the cylinder head.
2. The integrated exhaust manifold (100) according to claim 1, wherein the first manifold (2) comprises a first branch section (21), a first merging transition section (22) and a first merging section (23) arranged in sequence in the flow direction of the gas flow, and the second manifold (3) comprises a second branch section (31), a second merging transition section (32) and a second merging section (33) arranged in sequence in the flow direction of the gas flow, with a gap between the first branch section (21) and the second branch section (31).
3. The integrated exhaust manifold (100) according to claim 2, characterized in that, with the reference plane passing through the first and second pipe sections (21, 31) being a first reference plane (m 1), the intersection point of the first reference plane (m 1) with the central streamline of the first pipe section (21) being a point a1, the intersection point of the first reference plane (m 1) with the central streamline of the second pipe section (31) being a point b1, the difference in height between the point a1 and the point b1 being H1,
taking the reference plane passing through the first converging transition (22) and the second converging transition (32) as a second reference plane (m 2), the intersection point of the second reference plane (m 2) and the central streamline of the first converging transition (22) is a point a2, the intersection point of the second reference plane (m 2) and the central streamline of the second converging transition (32) is a point b2, the height difference between the point a2 and the point b2 is H2, H1 and H2 satisfy: h1 > H2.
4. The integrated exhaust manifold (100) according to claim 3, wherein, with the reference plane passing through the first merging section (23) and the second merging section (33) being a third reference plane (m 3), the intersection point of the third reference plane (m 3) with the central streamline of the first merging section (23) being a point a3, the intersection point of the third reference plane (m 3) with the central streamline of the second merging section (33) being a point b3, the difference in height between the point a3 and the point b3 being H3, H1, H2, H3 satisfying: h1 > H2 > H3.
5. The integrated exhaust manifold (100) according to claim 1, wherein the rate of change of curvature of the central flow line (n 1) of the first manifold (2) is smaller than the rate of change of curvature of the central flow line (n 2) of the second manifold (3).
6. The integrated exhaust manifold (100) according to claim 3, wherein the curvature K1 at the a1 and the curvature K2 at the b1 satisfy: 1 < K2/K1 < 3.
7. The integrated exhaust manifold (100) according to claim 2, wherein the downstream end of the first pipe section (21) and the downstream end of the second pipe section (31) are connected by a transition structure (5), the transition structure (5) extending in a direction away from a central streamline of the first pipe section (21) in a flow direction of the gas flow, the curvature of the transition structure (5) being larger than the curvature of the first pipe section (21) at the connection with the transition structure (5).
8. The integrated exhaust manifold (100) according to claim 1, wherein a cross section of the first manifold (2) on the reference plane is formed in an elliptical shape, a cross section of the second manifold (3) on the reference plane is formed in an elliptical shape, and a cross section of the first manifold (2) on the reference plane is arranged asymmetrically with respect to a cross section of the second manifold (3) on the reference plane.
9. The integrated exhaust manifold (100) according to any one of claims 1 to 8, wherein the cylinder exhaust pipes (1) are four and are a first cylinder exhaust pipe (11), a second cylinder exhaust pipe (12), a third cylinder exhaust pipe (13), and a fourth cylinder exhaust pipe (14) arranged in this order, respectively, and the exhaust port (15) is located between the second cylinder exhaust pipe (12) and the third cylinder exhaust pipe (13).
10. An engine, comprising: a cylinder head and an integrated exhaust manifold (100) according to any of claims 1-9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010679829.4A CN113153507B (en) | 2020-07-15 | 2020-07-15 | Integrated exhaust manifold and engine with same |
| PCT/CN2021/105762 WO2022012467A1 (en) | 2020-07-15 | 2021-07-12 | Integrated exhaust manifold and engine having same, and vehicle |
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| CN202010679829.4A CN113153507B (en) | 2020-07-15 | 2020-07-15 | Integrated exhaust manifold and engine with same |
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| CN113153507B true CN113153507B (en) | 2022-04-22 |
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| CN114135380B (en) * | 2022-01-27 | 2023-01-06 | 潍柴动力股份有限公司 | Exhaust manifold |
| CN115234350B (en) * | 2022-04-06 | 2024-07-02 | 长城汽车股份有限公司 | Engine exhaust system and vehicle |
| CN115324702B (en) * | 2022-10-14 | 2023-03-21 | 潍柴动力股份有限公司 | Exhaust manifold with flow guide module and parameter determination method thereof |
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| DE102012020381B4 (en) * | 2012-10-18 | 2019-10-10 | Volkswagen Aktiengesellschaft | Cylinder head with integrated exhaust manifold |
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| CN1488846A (en) * | 2002-10-11 | 2004-04-14 | Ygk��ʽ���� | Narrow-angle v-shape engine |
| JP2005307856A (en) * | 2004-04-21 | 2005-11-04 | Calsonic Kansei Corp | Exhaust manifold |
| CN101457706A (en) * | 2007-12-12 | 2009-06-17 | 现代自动车株式会社 | Cylinder head having an integrally formed port-exhaust manifold assembly |
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| WO2022012467A1 (en) | 2022-01-20 |
| CN113153507A (en) | 2021-07-23 |
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