Engine

Abstract

The utility model provides an engine which can enable air-fuel ratios of a plurality of cylinders to be evenly distributed. The engine includes: an engine body having a plurality of cylinders; and an annular intake manifold including a pair of resonance chambers arranged in a row direction of the plurality of cylinders, a resonance pipe connected to one end of each of the pair of resonance chambers, and a communicating pipe connected to the other end of each of the pair of resonance chambers, the engine further comprises a throttling valve body and a plurality of air inlet pipes, the throttling valve body is connected to the resonance pipes, the air inlet pipes are alternately arranged between the resonance chambers and connected with the resonance chambers and the air cylinders, the annular air inlet manifold is provided with at least one protruding part, and the protruding part is provided with at least one air inlet. The at least one protruding part is integrally formed on the communicating pipe and is adjacent to at least one resonance chamber in the pair of resonance chambers, and the at least one protruding part protrudes towards the outer side of the at least one resonance chamber.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of vehicle components, in particular to a kind of engine. BACKGROUND

[0002] In recent years, in order to ensure that more people can afford, reliable, sustainable and advanced energy access, the research and development of fuel efficiency improvement is being carried out to contribute to the efficiency of energy. However, in the engine of the vehicle, the distance between multiple cylinders and throttle body is different, so that the intake amount of the cylinder far from the throttle body is not uniform with the cylinder close to the throttle body, resulting in uneven distribution of air-fuel ratio of multiple cylinders. Therefore, it is necessary to improve the engine to overcome the above problems. SUMMARY

[0003] The utility model provides a kind of engine, can make the air-fuel ratio distribution of multiple cylinders uniform.

[0004] The utility model provides a kind of engine, comprising: engine body, with multiple cylinders;And annular intake manifold, including a pair of resonance chamber, resonance pipe and communicating pipe, the pair of resonance chamber is arranged along the direction of the multiple cylinders, the resonance pipe is connected one end of each resonance chamber in the pair of resonance chamber, the communicating pipe is connected the other end of each resonance chamber in the pair of resonance chamber, the engine further includes throttle body and multiple intake pipes, the throttle body is connected in the resonance pipe, the multiple intake pipes are alternately arranged between the pair of resonance chamber and connect the pair of resonance chamber and the multiple cylinders, the annular intake manifold has at least one protruding portion, the at least one protruding portion is integrally formed in the communicating pipe and is adjacent at least one resonance chamber in the pair of resonance chamber, the at least one protruding portion protrudes to the outside of the at least one resonance chamber.

[0005] In the embodiment of the utility model, the outer surface of the at least one resonance chamber includes a plane, and the at least one protruding portion protrudes outward from the plane.

[0006] In the embodiment of the utility model, the cross-sectional area of the at least one resonance chamber gradually increases in the direction towards the communicating pipe, and the at least one protruding portion is located at the maximum cross-sectional area of the at least one resonance chamber.

[0007] In the embodiment of the utility model, the at least one protruding portion includes a pair of protruding portions, the position of the top surface of one protruding portion in the pair of protruding portions corresponds to the open end of one intake pipe in the multiple intake pipes, and the position of the top surface of the other protruding portion in the pair of protruding portions corresponds to the position between two intake pipes in the multiple intake pipes.

[0008] Based on the above, in the engine of the utility model, the communication pipe of the annular intake manifold is provided with a protruding part at a position far from the throttle valve body (namely, the position adjacent to the resonance chamber) to improve the intake efficiency of the cylinder at this position, and further reduce the intake efficiency difference of the plurality of cylinders.

[0009] In order to make the above features and advantages of the utility model more obvious and easy to understand, the following examples are taken, and the details are described as follows with the help of the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a partial sectional view of the engine of an embodiment of the utility model;

[0011] Figure 2 is Figure 1 the top view of the engine of

[0012] Figure 3 is Figure 2 the side view of the partial component of the engine of

[0013] Figure 4 show the partial structure of the engine of Figure 2

[0014] BRIEF DESCRIPTION OF DRAWINGS

[0015] 100: engine;

[0016] 110: engine body;

[0017] 110A, 110B: cylinder bank;

[0018] 112: cylinder cover;

[0019] 114: cylinder head;

[0020] 116: cylinder;

[0021] 120: intake structure;

[0022] 122: annular intake manifold;

[0023] 1221A, 1221B: resonance chamber;

[0024] 1222: resonance pipe;

[0025] 1222a: connecting end;

[0026] 1223: communication pipe;

[0027] 1224A, 1224B: protruding part;

[0028] ​124A, 124B: intake pipe;

[0029] 126: reinforcing rib;

[0030] 130: throttle body;

[0031] E: open end;

[0032] P: position;

[0033] S1, S2: plane;

[0034] T1, T2: top surface;

[0035] W1, W2: width;

[0036] X, Y, Z: axial direction. DETAILED DESCRIPTION

[0037] Figure 1 is a partial sectional view of an engine according to an embodiment of the present application, which shows the axial directions X, Y, Z. Figure 2 is a top view of the engine of Figure 1 Figure 3 is a side view of a part of the engine of Figure 2 . Please refer to Figures 1 to 3 , the engine 100 of the present embodiment includes an engine body 110, an intake structure 120, and a throttle body 130. The engine body 110 is, for example, a V-type engine and includes two cylinder banks 110A, 110B, each of which includes a cylinder head cover 112, a cylinder head 114, and a plurality of cylinders 116. The plurality of cylinders 116 of each of the cylinder banks 110A, 110B are arranged along the axial direction X. The intake structure 120 is disposed on the engine body 110 and connected to the cylinder banks 110A, 110B, and the throttle body 130 is connected to the intake structure 120. Air enters the cylinder banks 110A, 110B via the throttle body 130 and the intake structure 120. An air cleaner 140 is disposed above the intake structure 120.

[0038] Figure 4 shows a part of the structure of the engine of Figure 2 . Please refer to Figure 2 and Figure 4 , the intake structure 120 includes a ring-shaped intake manifold 122, a plurality of intake pipes 124A, 124B of equal length, and a reinforcing rib 126. The ring-shaped intake manifold 122 includes a pair of resonance chambers 1221A, 1221B and includes a resonance pipe 1222 and a communication pipe 1223. The pair of resonance chambers 1221A, 1221B are arranged along the cylinder 116 (shown in Figure 1 ​) are arranged in a column direction (axial direction Y), a resonance pipe 1222 is connected to one end of each of the resonance chambers 1221A, 1221B, and a communication pipe is connected to the other end of each of the resonance chambers 1221A, 1221B. A throttle body 130 is connected to a connection end 1222a of the resonance pipe 1222. A plurality of intake pipes 124A, 124B are alternately arranged between a pair of the resonance chambers 1221A, 1221B and connected to the pair of the resonance chambers 1221A, 1221B and the plurality of cylinders 116. A reinforcing rib 126 is arranged above the plurality of intake pipes 124A, 124B to reinforce the structure of the plurality of intake pipes 124A, 124B.

[0039] In detail, the plurality of intake pipes 124A are connected to the resonance chamber 1221A and connected to the plurality of cylinders 116 of the cylinder bank 110A shown by Figure 1 , respectively. The plurality of intake pipes 124B are connected to the resonance chamber 1221B and connected to the plurality of cylinders 116 of the cylinder bank 110B shown by Figure 1 , respectively. A part of the air flows from the throttle body 130, sequentially through the resonance pipe 1222, the resonance chamber 1221A, and the intake pipe 124A, and into the cylinder bank 110A, and another part of the air flows from the throttle body 130, sequentially through the resonance pipe 1222, the resonance chamber 1221B, and the intake pipe 124B, and into the cylinder bank 110B.

[0040] In the present embodiment, the annular intake manifold 122 has two protruding portions 1224A, 1224B. The protruding portion 1224A is integrally formed in the communication pipe 1223 and adjacent to the resonance chamber 1221A, and the protruding portion 1224A protrudes outward of the resonance chamber 1221A. Similarly, the protruding portion 1224B is integrally formed in the communication pipe 1223 and adjacent to the resonance chamber 1221B, and the protruding portion 1224B protrudes outward of the resonance chamber 1221B.

[0041] As described above, in the engine 100 of the present embodiment, the communication pipe 1223 of the annular intake manifold 122 is provided with the protruding portions 1224A, 1224B at a position farther from the throttle body 130 (i.e., a position adjacent to the resonance chambers 1221A, 1221B) to improve the intake efficiency of the cylinders 126 at this position, thereby reducing the intake efficiency difference among the plurality of cylinders 126. Thus, the engine 100 of the present embodiment can make the Air-fuel ratio distribution of the plurality of cylinders 126 uniform.

[0042] Further, in the present embodiment, the width W1 (indicated by Figure 4 ) of the resonance chamber 1221A increases along the direction toward the communication pipe 1223, so that the cross-sectional area of the resonance chamber 1221A increases along the direction toward the communication pipe 1223, and the protruding portion 1224A is located at the largest cross-sectional area of the resonance chamber 1221A. Similarly, the width W2 (indicated by ) of the resonance chamber 1221B increases along the direction toward the communication pipe 1223, so that the cross-sectional area of the resonance chamber 1221B increases along the direction toward the communication pipe 1223, and the protruding portion 1224B is located at the largest cross-sectional area of the resonance chamber 1221B.Figure 4 ) gradually increases along the direction toward the communication pipe 1223, so that the cross-sectional area of the resonance chamber 1221B gradually increases along the direction toward the communication pipe 1223, and the convex portion 1224B is located at the largest cross-sectional area of the resonance chamber 1221B. In this way, the intake efficiency of the cylinder 126 far from the throttle body 130 can be further improved, so as to further reduce the intake efficiency difference of the plurality of cylinders 126.

[0043] In addition, in the present embodiment, the outer surface of the resonance chamber 1221A includes a plane S1, and the convex portion 1224A protrudes outward from the plane S1. Similarly, the outer surface of the resonance chamber 1221B includes a plane S2, and the convex portion 1224B protrudes outward from the plane S2. By forming the outer surfaces of the resonance chambers 1221A, 1221B as the planes S1, S2 respectively, the generation of turbulent flow can be inhibited.

[0044] The position of the top surface T1 of the convex portion 1224A in the present embodiment corresponds to the opening end E of one intake pipe 124A, and the position of the top surface T2 of the convex portion 1224B corresponds to the position P between the two intake pipes 124B. In this way, the plurality of intake pipes 124A, 124B can be arranged in a compact manner, so as to reduce the volume of the intake structure 122.

[0045] In summary, in the engine of the present application, the communication pipe of the annular intake manifold is provided with a convex portion at a position far from the throttle body (i.e., a position adjacent to the resonance chamber), so as to improve the intake efficiency of the cylinder at this position, and further reduce the intake efficiency difference of the plurality of cylinders. Therefore, the engine of the present application can make the air-fuel ratio distribution of the plurality of cylinders uniform.

[0046] 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: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for 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. An engine, characterized in that, include: The engine block has multiple cylinders; as well as The annular intake manifold includes a pair of resonant chambers, a resonant tube, and a connecting tube. The pair of resonance chambers are arranged along the column direction of the plurality of cylinders. The resonant tube is connected to one end of each of the pair of resonant chambers. The connecting pipe connects to the other end of each of the pair of resonant chambers. The engine also includes a throttle body and multiple intake pipes. The throttling valve body is connected to the resonant tube. The plurality of intake pipes are alternately arranged between the pair of resonance chambers and connect the pair of resonance chambers and the plurality of cylinders. The annular intake manifold has at least one protrusion integrally formed in the connecting pipe and adjacent to at least one of the pair of resonant chambers, the at least one protrusion protruding outward from the at least one resonant chamber.

2. The engine according to claim 1, characterized in that, The outer surface of the at least one resonant chamber includes a plane. The at least one protrusion protrudes outward from the plane.

3. The engine according to claim 1, characterized in that, The cross-sectional area of ​​the at least one resonant chamber gradually increases along the direction towards the connecting pipe. The at least one protrusion is located at the maximum cross-sectional area of ​​the at least one resonance chamber.

4. The engine according to claim 1, characterized in that, The at least one protrusion includes a pair of protrusions. The top surface of one of the pair of protrusions corresponds to the opening end of one of the plurality of air intake pipes. The position of the top surface of the other protrusion in the pair of protrusions corresponds to the position between the two intake pipes in the plurality of intake pipes.

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