engine

Abstract

The utility model provides a kind of engine, and the compact and large-capacity exhaust gas recirculation plenum is constituted by simple structure, and the airflow pulsation in exhaust gas recirculation plenum is inhibited to improve airflow stability.Engine includes: engine body, with multiple cylinder;And intake manifold, including a pair of air chamber and resonator, air chamber is arranged along the direction of column of cylinder, resonator is connected air chamber, engine also includes throttle body, multiple air pipe and exhaust gas recirculation plenum, resonator has flange, flange has the opening of upward inclination, throttle body is connected to resonator by flange, multiple air pipe is alternately arranged between a pair of air chamber and is connected a pair of air chamber and multiple cylinder, the bottom of resonator has bevel, resonator is connected to a pair of air chamber by bevel, exhaust gas recirculation plenum is integrally formed and connected to the bottom of resonator, exhaust gas recirculation gas is discharged to resonator via exhaust gas recirculation plenum.

Description

Technical Field

[0001] This utility model relates to a vehicle component, and more particularly to an engine. Background Technology

[0002] In recent years, to ensure access to affordable, reliable, sustainable, and advanced energy for more people, research and development on vehicle lightweighting, which contributes to energy efficiency, has been underway. In existing technologies, the exhaust gas recirculation (EGR) chamber of engines is limited by space constraints, resulting in insufficient and unstable EGR flow. Therefore, how to construct a large-capacity EGR chamber using a simple structure and achieve stable airflow is a crucial issue in engine structural design. Utility Model Content

[0003] This invention provides an engine that, through a simple structure, forms a compact and large-capacity exhaust gas recirculation chamber, and suppresses airflow pulsation within the exhaust gas recirculation chamber to improve airflow stability.

[0004] According to an embodiment of the present invention, an engine includes: an engine body having a plurality of cylinders; and an intake manifold including a pair of intake chambers and a resonant tube, the pair of intake chambers being arranged along the column direction of the plurality of cylinders, the resonant tube being connected to one end of each of the pair of intake chambers; the engine further includes a throttle body, a plurality of intake pipes, and an exhaust gas recirculation chamber; the resonant tube has a flange with an upwardly inclined opening; the throttle body is connected to the resonant tube via the flange; the plurality of intake pipes are alternately arranged between the pair of intake chambers and connect the pair of intake chambers and the plurality of cylinders; the bottom of the resonant tube has an inclined surface; the resonant tube is connected to the pair of intake chambers via the inclined surface; the exhaust gas recirculation chamber is integrally formed and connected to the bottom of the resonant tube; and the exhaust gas recirculation gas is discharged to the resonant tube via the exhaust gas recirculation chamber.

[0005] In an embodiment of the present invention, the exhaust gas recirculation chamber includes two parts, at least one of which constitutes the bottom of the resonant tube.

[0006] In an embodiment of the present invention, the exhaust gas recirculation chamber includes an exhaust gas recirculation gas channel and a supply port connected to the exhaust gas recirculation gas channel, the supply port being integrally formed and connected to the bottom of the resonant tube.

[0007] In an embodiment of the present invention, the inner diameter of the connection between the exhaust gas recirculation channel and the supply port increases from the exhaust gas recirculation channel toward the supply port.

[0008] In an embodiment of the present invention, the exhaust gas recirculation chamber includes a pair of integrally formed gas outlets that discharge gas into the pair of inlet chambers.

[0009] In an embodiment according to the present invention, the pair of gas outlets face the downstream side of the incoming gas flow.

[0010] In an embodiment according to the present invention, one of the pair of gas outlets is closer to the plurality of inlet pipes than the other of the pair of gas outlets, and the opening area of ​​one of the pair of gas outlets is larger than the opening area of ​​the other of the pair of gas outlets.

[0011] Based on the above, in the engine of this invention, the resonant tube is connected to the throttle body via a flange with an upwardly inclined opening. The resonant tube is correspondingly shaped with a slope at its bottom, connecting to the intake chamber via the slope. The exhaust gas recirculation (EGR) chamber is integrally formed and connected to the bottom of the resonant tube. Accordingly, the area below the slope can become part of the EGR chamber, increasing its capacity, and this portion of the EGR chamber forms a dead volume with low flow. Thus, the engine of this invention achieves a compact and large-capacity EGR chamber through a simple structure, and suppresses airflow pulsation within the EGR chamber, thereby improving airflow stability.

[0012] To make the above-mentioned features and advantages of this utility model more apparent and understandable, specific embodiments are described below, and detailed descriptions are provided in conjunction with the accompanying drawings. Attached Figure Description

[0013] Figure 1 This is a partial cross-sectional schematic diagram of an engine according to an embodiment of the present invention;

[0014] Figure 2 yes Figure 1 Top view of the engine;

[0015] Figure 3 Show Figure 2 Partial structure of the engine;

[0016] Figure 4 yes Figure 2 A side view of the air intake structure;

[0017] Figure 5 yes Figure 2 A partial 3D view of the air intake structure;

[0018] Figure 6 yes Figure 2 A partial cross-sectional view of the air intake structure;

[0019] Figure 7 yes Figure 2 A partial cross-sectional view of the air intake structure.

[0020] Explanation of reference numerals in the attached figures:

[0021] 100: Engine;

[0022] 110: Engine body;

[0023] 110A, 110B: Cylinder exhaust;

[0024] 112: Cylinder head cover;

[0025] 114: Cylinder head;

[0026] 116: Cylinder;

[0027] 120: Intake structure;

[0028] 122: Intake manifold;

[0029] 1221A, 1221B: Intake chamber;

[0030] 1222: Resonant tube;

[0031] 1222a: Flange;

[0032] 1222b: Opening;

[0033] 1222c: Bevel;

[0034] 1223: Connecting pipe;

[0035] 124A, 124B: Intake pipes;

[0036] 126: Reinforcing ribs;

[0037] 130: Throttling valve body;

[0038] 140: Exhaust gas recirculation chamber;

[0039] 1401, 1402: Parts;

[0040] 140a: Open;

[0041] 142: Exhaust gas recirculation channel;

[0042] 143: Connecting port;

[0043] 144: Supply port;

[0044] 145, 146: Gas outlet;

[0045] 150: Air purifier;

[0046] F1, F2: Exhaust gas recirculation gas;

[0047] W: Top wall;

[0048] X, Y, Z: Axial axes. Detailed Implementation

[0049] Figure 1 This is a partial cross-sectional schematic diagram of an engine according to an embodiment of the present invention, showing the axial directions X, Y, and Z. Figure 2 yes Figure 1 A top view of the engine. Please refer to... Figure 1 and Figure 2 The engine 100 of this 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 and 110B. Cylinder bank 110A is, for example, a rest-side cylinder bank, and cylinder bank 110B is, for example, a conventional-side cylinder bank. Each of cylinder banks 110A and 110B includes a cylinder head cover 112, a cylinder head 114, and a plurality of cylinders 116. The plurality of cylinders 116 of each of cylinder banks 110A and 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 and 110B, and the throttle body 130 is connected to the intake structure 120. Air enters the cylinder banks 110A and 110B via the throttle body 130 and the intake structure 120. The air purifier 150 is positioned above the air intake structure 120.

[0050] Figure 3 Show Figure 2 The engine's partial structure. Please refer to... Figure 2 and Figure 3 The intake structure 120 includes an intake manifold 122, a plurality of intake pipes 124A and 124B of equal length, and reinforcing ribs 126. The intake manifold 122 includes a pair of intake chambers 1221A and 1221B and includes a resonant tube 1222 and a connecting tube 1223. The pair of intake chambers 1221A and 1221B extend along the cylinder 116 (shown in...). Figure 1The intake pipes 124A and 124B are arranged in a column direction (axis Y). A resonant tube 1222 connects to one end of each intake chamber 1221A and 1221B, and a connecting pipe connects to the other end of each intake chamber 1221A and 1221B. A throttle body 130 is connected to the flange 1222a of the resonant tube 1222. Multiple intake pipes 124A and 124B are alternately arranged between a pair of intake chambers 1221A and 1221B and connect the pair of intake chambers 1221A and 1221B to multiple cylinders 116. Reinforcing ribs 126 are disposed above the multiple intake pipes 124A and 124B to reinforce the structure of the multiple intake pipes 124A and 124B.

[0051] In detail, multiple intake pipes 124A are connected to the intake chamber 1221A and are respectively connected to Figure 1 The cylinder bank 110A shown has multiple cylinders 116, and multiple intake pipes 124B connected to the intake chamber 1221B and respectively connected to... Figure 1 The cylinder bank 110B shown has multiple cylinders 116. A portion of the air flows from the throttle body 130 through the resonant tube 1222, the intake chamber 1221A, and the intake pipe 124A in sequence to enter the cylinder bank 110A, while another portion of the air flows from the throttle body 130 through the resonant tube 1222, the intake chamber 1221B, and the intake pipe 124B in sequence to enter the cylinder bank 110B.

[0052] Figure 4 yes Figure 2 A side view of the air intake structure. Figure 5 yes Figure 2 A partial 3D view of the air intake structure. Figure 6 yes Figure 2 A partial cross-sectional view of the air intake structure. Please refer to... Figures 4 to 6 The engine 100 also includes an exhaust gas recirculation chamber 140. A resonant tube 1222 has a flange 1222a with an upwardly inclined opening 1222b. A throttle body 130 is connected to the resonant tube 1222 via the flange 1222a. The bottom of the resonant tube 1222 has a slope 1222c, and the resonant tube 1222 is connected to a pair of intake chambers 1221A and 1221B via the slope 1222c. The exhaust gas recirculation chamber 140 is integrally formed and connected to the bottom of the resonant tube 1222. Exhaust gas recirculation gas is discharged to the resonant tube 1222 via the exhaust gas recirculation chamber 140. In this embodiment, the exhaust gas recirculation chamber 140 is as follows: Figure 5 The diagram shows two parts 1401 and 1402, at least one of which constitutes the bottom of the resonant tube 1222.

[0053] As described above, in the engine 100 of this embodiment, the resonant tube 1222 is connected to the throttle body 130 via a flange 1222a having an upwardly inclined opening 1222b. The resonant tube 1222 is correspondingly configured to have a slope 1222c at its bottom and is connected to the intake chambers 1221A and 1221B via the slope 1222c. The exhaust gas recirculation chamber 140 is integrally formed and connected to the bottom of the resonant tube 1222. Accordingly, the area below the slope 1222c can become part of the exhaust gas recirculation chamber 140, increasing the capacity of the exhaust gas recirculation chamber 140, and this portion of the exhaust gas recirculation chamber 140 forms a dead volume with low flow. Thus, the engine 100 of this embodiment constructs a compact and large-capacity exhaust gas recirculation chamber 140 with a simple structure, and suppresses airflow pulsation within the exhaust gas recirculation chamber 140, thereby improving airflow stability.

[0054] Please refer to Figure 6 Specifically, in this embodiment, the top wall W of the exhaust gas recirculation chamber 140 is the bottom wall of the resonant tube 1222. That is, the exhaust gas recirculation chamber 140 constitutes the bottom of the resonant tube 1222. With this configuration, the gas in the resonant tube 1222 can receive heat from the exhaust gas recirculation gas temperature in the exhaust gas recirculation chamber 140 from the top wall W of the exhaust gas recirculation chamber 140 to reduce the temperature difference between the two, thereby suppressing condensation caused by the exhaust gas recirculation airflow discharged to the intake chambers 1221A and 1221B and reducing the generation of condensate.

[0055] In this embodiment, the exhaust gas recirculation chamber 140 includes an exhaust gas recirculation gas passage 142 and a supply port 144 connecting the exhaust gas recirculation gas passage 142. The exhaust gas recirculation gas flows sequentially through the exhaust gas recirculation gas passage 142 and the supply port 144 to reach the interior of the exhaust gas recirculation chamber 140. The supply port 144 can be integrally formed and connected to the bottom of the resonant tube 1222 to simplify the structure and avoid an excessive number of components. Furthermore, in this embodiment, the inner diameter of the connection port 143 between the exhaust gas recirculation gas passage 142 and the supply port 144 increases from the exhaust gas recirculation gas passage 142 towards the supply port 144. Accordingly, the flow rate reduction caused by exhaust gas recirculation gas stripping can be suppressed.

[0056] Figure 7 yes Figure 2 A partial cross-sectional view of the air intake structure. Please refer to... Figure 6 and Figure 7In this embodiment, the exhaust gas recirculation chamber 140 includes a pair of integrally formed gas outlets 145 and 146, which discharge recirculated exhaust gas into a pair of inlet chambers 1221A and 1221B. By forming the pair of gas outlets 145 and 146 integrally into the exhaust gas recirculation chamber 140, the structure is simplified and the number of components is avoided. Furthermore, in this embodiment, the pair of gas outlets 145 and 146 face the downstream side of the inlet airflow. Accordingly, the gas outlets 145 and 146 can discharge the recirculated exhaust gas along the inlet airflow direction within the resonant tube 1222, thereby preventing the backflow of condensate into the throttle valve body 130, reducing pressure loss, and preventing the throttle valve body 130 from becoming blocked.

[0057] Furthermore, such as Figure 7 As shown, gas outlet 145 is closer to intake pipes 124A and 124B than gas outlet 146. More specifically, the distance between gas outlet 145 and intake pipe 124A, which is closest to gas outlet 145, is less than the distance between gas outlet 146 and intake pipe 124B, which is closest to gas outlet 146. In this case, the degree of mixing between the exhaust gas recirculation gas F1 flowing from gas outlet 145 to intake pipe 124A and the mainstream gas in intake chamber 1221A is lower than the degree of mixing between the exhaust gas recirculation gas F2 flowing from gas outlet 146 to intake pipe 124B and the mainstream gas in intake chamber 1221B. Based on this, the opening area of ​​gas outlet 145 in this embodiment is formed to be larger than the opening area of ​​gas outlet 146, so as to compensate for the above-mentioned uneven gas mixing by the difference in the opening areas of gas outlets 145 and 146.

[0058] In summary, in the engine of this invention, the resonant tube is connected to the throttle body via a flange with an upwardly inclined opening. The resonant tube is correspondingly shaped with a slope at its bottom, connecting to the intake chamber via the slope. The exhaust gas recirculation (EGR) chamber is integrally formed and connected to the bottom of the resonant tube. Accordingly, the area below the slope becomes part of the EGR chamber, increasing its capacity, and this portion of the EGR chamber forms a dead volume with low flow. Thus, the engine of this invention achieves a compact and large-capacity EGR chamber through a simple structure, and suppresses airflow pulsation within the EGR chamber, thereby improving airflow stability.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. An engine, characterized in that, include: The engine block has multiple cylinders; as well as The intake manifold includes a pair of intake chambers and a resonant tube. The pair of intake 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 air intake chambers. The engine also includes a throttle body, multiple intake pipes, and an exhaust gas recirculation chamber. The resonant tube has a flange with an upwardly inclined opening, and the throttle valve body is connected to the resonant tube through the flange. The plurality of intake pipes are alternately arranged between the pair of intake chambers and connect the pair of intake chambers and the plurality of cylinders. The bottom of the resonant tube has a slope, and the resonant tube is connected to the pair of air intake chambers through the slope. The exhaust gas recirculation chamber is integrally formed and connected to the bottom of the resonant tube. The recirculated exhaust gas is discharged to the resonant tube via the exhaust gas recirculation chamber.

2. The engine according to claim 1, characterized in that, The exhaust gas recirculation chamber includes two parts, at least one of which constitutes the bottom of the resonant tube.

3. The engine according to claim 2, characterized in that, The exhaust gas recirculation chamber includes an exhaust gas recirculation gas channel and a supply port connected to the exhaust gas recirculation gas channel. The supply port is integrally formed and connected to the bottom of the resonant tube.

4. The engine according to claim 3, characterized in that, The inner diameter of the connection between the exhaust gas recirculation channel and the supply port increases from the exhaust gas recirculation channel toward the supply port.

5. The engine according to any one of claims 2 to 4, characterized in that, The exhaust gas recirculation chamber includes a pair of integrally formed gas outlets that discharge gas into the pair of inlet chambers.

6. The engine according to claim 5, characterized in that, The pair of gas outlets face the downstream side of the incoming gas flow.

7. The engine according to claim 6, characterized in that, One of the pair of gas outlets is closer to the plurality of inlet pipes than the other of the pair of gas outlets, and the opening area of ​​one of the pair of gas outlets is larger than the opening area of ​​the other of the pair of gas outlets.

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