Cylinder structure

Abstract

The utility model provides a cylinder structure which can increase the flow and heat dissipation efficiency of an exhaust part. The cylinder structure includes: a plurality of combustion chambers arranged along a cylinder row; the cylinder cover is provided with an exhaust channel, the exhaust channel comprises a plurality of exhaust parts and an exhaust collection part, the exhaust parts are connected to the combustion chambers, the exhaust parts are collected in the exhaust collection part, and the exhaust parts are provided with cambered surfaces bent towards the inner side of the exhaust channel; the exhaust passage forms a flared shape extending from the exhaust collection portion.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of internal combustion engine local structure, and especially a kind of cylinder structure. BACKGROUND

[0002] In recent years, in order to ensure that more people can afford, reliable, sustainable and advanced energy access, research and development related to improving fuel efficiency that contributes to the efficiency of energy is being carried out. In the development related to improving fuel efficiency of vehicles, the heat dissipation performance of the exhaust portion can be improved by increasing the surface area of the exhaust portion of the exhaust gas of the cylinder. One way to increase the surface area of the exhaust portion of the cylinder is to form a section that merges the two exhaust portions between the junction of the two exhaust portions and the exhaust collection portion, and to increase the length of this section. However, under this design, the airflow of the two exhaust portions may converge at the junction in a manner facing each other, making it difficult for the exhaust gas to flow smoothly to the exhaust collection portion. Therefore, it is necessary to improve the exhaust structure of the cylinder to overcome the above problems. SUMMARY

[0003] The utility model provides a kind of cylinder structure, can increase the flow and heat dissipation efficiency of exhaust portion.

[0004] The utility model provides a kind of cylinder structure, comprising: multiple combustion chambers, along cylinder column arrangement;And cylinder cover, with exhaust passage, the exhaust passage includes multiple exhaust portions and exhaust collection portion, the multiple exhaust portions are connected to the multiple combustion chambers, the multiple exhaust portions are collected in the exhaust collection portion, the multiple exhaust portions have the arc surface that is curved towards the inside of the exhaust passage, the exhaust passage forms the horn mouth shape that extends from the exhaust collection portion.

[0005] In the embodiment of the utility model, each of the multiple combustion chambers is connected to a pair of exhaust portions in the multiple exhaust portions, the pair of exhaust portions converges at a convergence position, and the pair of exhaust portions has a glasses-like cross section between the convergence position and the exhaust collection portion.

[0006] In the embodiment of the utility model, two outer exhaust portions in the multiple exhaust portions have the arc surface in the region of the glasses-like cross section.

[0007] In the embodiment of the utility model, the central exhaust portion in the multiple exhaust portions has the arc surface in the region of the glasses-like cross section.

[0008] According to the above, in the cylinder structure of the utility model, the exhaust part of the exhaust passage has an arc surface bending towards the inside, so that the exhaust passage forms a horn mouth shape. Accordingly, through the horn mouth shape of the exhaust passage, the flow path of the exhaust part is enlarged, the flow path of the exhaust part is smooth and the length is increased, and further, the exhaust gas can flow along the exhaust part to the exhaust collection part smoothly, and the heat dissipation area of the exhaust passage is increased. Therefore, the cylinder structure of the utility model can increase the flow rate and heat dissipation efficiency of the exhaust part.

[0009] In order to make the above features and advantages of the utility model more obvious and easy to understand, the following specific examples are described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a perspective view of the cylinder structure of an embodiment of the utility model;

[0011] Figure 2 showing Figure 1 the exhaust passage of the utility model;

[0012] Figure 3 is Figure 2 a sectional view of the exhaust passage of the utility model along line I-I.

[0013] BRIEF DESCRIPTION OF DRAWINGS

[0014] 50: exhaust pipe;

[0015] 60: catalyst device;

[0016] 100: cylinder structure;

[0017] 110: cylinder;

[0018] 1101, 1102, 1103: combustion chamber;

[0019] 120: cylinder head;

[0020] 122: cylinder head body;

[0021] 124: exhaust passage;

[0022] 1241A, 1241B, 1241C: exhaust part;

[0023] 1241a: spectacle-shaped cross section;

[0024] 1242: exhaust collection part;

[0025] P1, P2, P3: merging position;

[0026] S1, S2, S3: arc surface. DETAILED DESCRIPTION

[0027] Figure 1 This is a three-dimensional diagram of the cylinder structure of an embodiment of the present invention. Figure 1 The cylinder structure 100 of this embodiment is, for example, a cylinder structure of an internal combustion engine for a vehicle, and includes a plurality of cylinders 110 and a cylinder head 120 covering these cylinders 110. These cylinders 110 each have combustion chambers 1101, 1102, and 1103, which are arranged along a cylinder bank formed by these cylinders 130. The cylinder head 120 includes a cylinder head body 122 and an exhaust passage 124 integrated with the cylinder head body 120. The exhaust passage 124 includes a plurality of exhaust sections (shown as a pair of exhaust sections 1241A, a pair of exhaust sections 1241B, and a pair of exhaust sections 1241C) and an exhaust manifold 1242.

[0028] One end of each of the exhaust sections 1241A, 1241B, and 1241C is connected to each of the combustion chambers 1101, 1102, and 1103, and the other ends of each of the exhaust sections 1241A, 1241B, and 1241C are connected to an exhaust manifold 1242. The exhaust manifold 1242 is connected to the catalyst device 60 via the exhaust pipe 50. Although not shown in detail, the catalyst device 60 contains a catalyst for purifying components in the exhaust gas. Waste from the combustion chambers 1101, 1102, and 1103 flows through the exhaust sections 1241A, 1241B, and 1241C to the exhaust manifold 1242, and then reaches the catalyst device 60 via the exhaust manifold 1242 and the exhaust pipe 50, where it is purified by the catalyst device 60 and then discharged. The detailed operation of the cylinders of the vehicle's internal combustion engine and the functioning of the catalyst device are known in the art and will not be described in detail here.

[0029] Figure 2 Show Figure 1 Please refer to the exhaust passage. Figure 2In the present embodiment, the exhaust portion 1241A has an arc surface S1 curved toward the inner side of the exhaust passage 124, the exhaust portion 1241B has an arc surface S2 curved toward the inner side of the exhaust passage 124, and the exhaust portion 1241C has an arc surface S3 curved toward the inner side of the exhaust passage 124. More specifically, the arc surface S1 is an outer surface of the exhaust portion 1241A and is a concave arc surface, the arc surface S2 is an outer surface of the exhaust portion 1241B and is a concave arc surface, and the arc surface S3 is an outer surface of the exhaust portion 1241C and is a concave arc surface. The exhaust passage 124 forms a trumpet shape extending from the exhaust collection portion 1242 through the arc surface S1 of the exhaust portion 1241A and the arc surface S3 of the exhaust portion 1241C. Accordingly, the flow paths of the exhaust portions 1241A, 1241B, and 1241C are expanded by the arc surfaces S1, S2, and S3 of the exhaust portions 1241A, 1241B, and 1241C, the trumpet shape of the exhaust passage 124, and the flow paths of the exhaust portions 1241A, 1241B, and 1241C are smooth and increased in length, and the exhaust gas can flow smoothly along the exhaust portions 1241A, 1241B, and 1241C to the exhaust collection portion 1242, and the heat dissipation area of the exhaust passage 124 is increased. Thus, the cylinder structure 100 of the present embodiment can increase the flow rate and heat dissipation efficiency of the exhaust portions 1241A, 1241B, and 1241C.

[0030] Figure 3 is Figure 2 a cross-sectional view of the exhaust passage along the line I-I. In the present embodiment, the combustion chamber 1101 is connected to a pair of exhaust portions 1241A as shown in Figure 1 , the pair of exhaust portions 1241A meet at a meeting position P1 (indicated by Figure 2 ) and have a spectacle-shaped cross section 1241a (indicated by Figure 3 ) between the meeting position P1 and the exhaust collection portion 1242. Similarly, the combustion chamber 1102 is connected to a pair of exhaust portions 1241B as shown in Figure 1 , the pair of exhaust portions 1241B meet at a meeting position P2 (indicated by Figure 2 ) and have a spectacle-shaped cross section similar to the spectacle-shaped cross section 1241a of Figure 3 , which is not shown here. Similarly, the combustion chamber 1103 is connected to a pair of exhaust portions 1241C as shown in Figure 1 , the pair of exhaust portions 1241C meet at a meeting position P3 (indicated by Figure 2 ) and have a spectacle-shaped cross section similar to the spectacle-shaped cross section 1241a of Figure 3The eyeglass-shaped cross section 1241a of the exhaust portion 1241A, 1241B, 1241C is not shown here. The structure of the eyeglass-shaped cross section of the exhaust portion 1241A, 1241B, 1241C can further increase the surface area of the exhaust portion 1241A, 1241B, 1241C to improve the heat dissipation performance.

[0031] More specifically, in the present embodiment, the two outer exhaust portions (the outer exhaust portion 1241A of the pair of exhaust portions 1241A and the outer exhaust portion 1241C of the pair of exhaust portions 1241C) have the aforementioned curved surfaces S1, S3 in the area of the aforementioned eyeglass-shaped cross section, respectively. Similarly, the central exhaust portion (the pair of exhaust portions 1241B) has the aforementioned curved surface S2 in the area of the aforementioned eyeglass-shaped cross section. Accordingly, the curved surfaces S1, S2, S3 increase the extension range of the area of the eyeglass-shaped cross section of the exhaust portions 1241A, 1241B, 1241C, respectively, and the heat dissipation area of the exhaust portions 1241A, 1241B, 1241C can be greatly increased.

[0032] In summary, in the cylinder structure of the present application, the exhaust portion of the exhaust passage has a curved surface curved toward the inner side, so that the exhaust passage forms a bell mouth shape. Accordingly, through the bell mouth shape of the exhaust passage, the flow path of the exhaust portion is expanded, the flow path of the exhaust portion is smooth and the length is increased, and further, the exhaust gas can flow smoothly along the exhaust portion to the exhaust collection portion, and the heat dissipation area of the exhaust passage is increased. Therefore, the cylinder structure of the present application can increase the flow rate and heat dissipation efficiency of the exhaust portion.

[0033] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A cylinder structure characterized by comprising: Comprise: a plurality of combustion chambers arranged along a cylinder bank; and a cylinder head having an exhaust passage, the exhaust passage including a plurality of exhaust portions connected to the plurality of combustion chambers and an exhaust collection portion in which the plurality of exhaust portions are collected, the plurality of exhaust portions having curved surfaces curved toward an inner side of the exhaust passage, the exhaust passage forming a bell mouth shape extending from the exhaust collection portion.

2. The cylinder structure according to claim 1, wherein each of the plurality of combustion chambers is connected to a pair of the plurality of exhaust portions, the pair of the plurality of exhaust portions meet at a meeting position.

3. The cylinder structure according to claim 2, wherein two outer exhaust portions of the plurality of exhaust portions have the curved surfaces in a region between the meeting position and the exhaust collection portion.

4. The cylinder structure according to claim 3, wherein a central exhaust portion of the plurality of exhaust portions has the curved surfaces in a region between the meeting position and the exhaust collection portion.

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