Internal combustion engine

Abstract

The utility model provides a kind of internal combustion engine, prevent oil dirt from adhering in exhaust system component by simple structure.The internal combustion engine includes: internal combustion engine main body, including cylinder, cylinder cover and cylinder cover cover, the cylinder cover is set on the cylinder, the cylinder cover cover covers the cylinder cover;Cooling liquid passage, with mounting flange and be connected to the cylinder cover by the mounting flange;Oil filler, set on the cylinder cover cover;And exhaust system component, set below the oil filler;The cooling liquid passage also has extension flange and oil guide wall, the extension flange extends laterally along the internal combustion engine main body, the oil guide wall is integrally connected to the extension flange, the oil guide wall is between the oil filler and exhaust system component, and it is suitable for guiding the oil from the oil filler to the internal combustion engine main body.

Description

Technical Field

[0001] This utility model relates to a vehicle power unit, and more particularly to an internal combustion engine. Background Technology

[0002] In recent years, research and development on lightweight vehicles that contribute to energy efficiency have been ongoing to ensure access to affordable, reliable, sustainable, and advanced energy for more people. In existing technologies, to prevent engine oil dripping from the filler neck into the exhaust gas recirculation (EGR) cooler, separate oil baffles or other independent oil guiding components are used. However, this increases the installation cost and structural complexity of the internal combustion engine. Therefore, how to prevent engine oil from dripping from the filler neck into the EGR cooler using a simple structure is an important issue in the structural design of internal combustion engines. Utility Model Content

[0003] This invention provides an internal combustion engine that prevents oil stains from adhering to exhaust system components through a simple structure.

[0004] According to an embodiment of the present invention, an internal combustion engine includes: an internal combustion engine body, including a cylinder, a cylinder head, and a cylinder head cover, wherein the cylinder head is disposed on the cylinder and the cylinder head cover covers the cylinder head; a coolant passage having a mounting flange and connected to the cylinder head through the mounting flange; a filler neck disposed on the cylinder head cover; and an exhaust system component disposed below the filler neck; the coolant passage further includes an extending flange and an oil guide wall, the extending flange extending laterally along the internal combustion engine body, the oil guide wall being integrally formed and connected to the extending flange, the oil guide wall being located between the filler neck and the exhaust system component, and being adapted to guide engine oil dripping from the filler neck to the internal combustion engine body.

[0005] In an embodiment of the present invention, when viewed from above the internal combustion engine, the width of the exhaust system component is less than the length of the oil guide wall.

[0006] In an embodiment according to the present invention, the internal combustion engine body is inclined toward the exhaust system component.

[0007] In an embodiment of the present invention, the oil guide wall is inclined downward toward the internal combustion engine body.

[0008] In an embodiment of the present invention, the exhaust system component is a water-cooled exhaust gas recirculation cooler.

[0009] In an embodiment of the present invention, when viewed from the side of the internal combustion engine, the exhaust gas recirculation cooler is closer to the engine body than the fuel filler neck.

[0010] Based on the above, in the internal combustion engine of this invention, the coolant passage is formed with an extending flange and an oil guide wall integrally formed on the extending flange, used to guide the engine oil dripping from the filler neck to the main body of the internal combustion engine and prevent it from falling onto the exhaust system components. Therefore, it is unnecessary to install a separate oil baffle or other separate oil guide components for guiding the oil. Thus, the internal combustion engine of this invention prevents oil from adhering to the exhaust system components through a simple structure, thereby reducing the installation cost and structural complexity of the internal combustion engine.

[0011] 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

[0012] Figure 1 This is a partial schematic diagram of an internal combustion engine according to an embodiment of the present invention;

[0013] Figure 2 yes Figure 1 A partial 3D view of the flow path structure;

[0014] Figure 3 yes Figure 1 A schematic diagram of the cooling water circuit for some components of an internal combustion engine;

[0015] Figure 4 yes Figure 2 A side view of the flow path structure;

[0016] Figure 5 Show Figure 1 The partial structure of an internal combustion engine;

[0017] Figure 6 Show Figure 1 The partial structure of an internal combustion engine.

[0018] Explanation of reference numerals in the attached figures:

[0019] 10: Internal combustion engine;

[0020] 12: Internal combustion engine body;

[0021] 12a: Cylinder;

[0022] 12b: Cylinder head;

[0023] 12c: Cylinder head cover;

[0024] 52, 54: Cylinder exhaust;

[0025] 52a, 54a: Water jacket;

[0026] 100: Flow path structure;

[0027] 105: Radiator;

[0028] 110: Coolant passage;

[0029] 112: Install the flange;

[0030] 114: Extended flange;

[0031] 114a: Front;

[0032] 114b: Reverse side;

[0033] 116: Oil guide wall;

[0034] 120: Catalyst device;

[0035] 120a: Bracket;

[0036] 122: Reflux gas channel;

[0037] 130: Fuel filler cap;

[0038] 140: Exhaust gas recirculation device;

[0039] 142: Exhaust system components;

[0040] 150: Exhaust gas recirculation channel;

[0041] 170: Thermostat;

[0042] 180: Heater;

[0043] 190: Pump;

[0044] A1, A2: Axis lines;

[0045] CW: Coolant;

[0046] D: Direction;

[0047] E1, E2, E3, E4, E5: Connection terminals;

[0048] L: Length;

[0049] S: Mating surface;

[0050] W: Width;

[0051] X, Y, Z: Axial axes. Detailed Implementation

[0052] Figure 1 This is a partial schematic diagram of an internal combustion engine according to an embodiment of the present invention, showing the axial directions X, Y, and Z. Figure 2 yes Figure 1 A partial 3D view of the flow path structure. Please refer to... Figure 1 and Figure 2 The internal combustion engine 10 of this embodiment includes an internal combustion engine body 12 and a flow path structure 100. The internal combustion engine body 12 includes a cylinder 12a, a cylinder head 12b, and a cylinder head cover 12c. The cylinder head 12b is disposed on the cylinder 12a, and the cylinder head cover 12c covers the cylinder head 12b. The flow path structure 100 includes a coolant passage 110, a catalytic converter 120, a filler neck 130, an exhaust gas recirculation (EGR) device 140, and an exhaust gas recirculation passage 150. The coolant passage 110 has a mounting flange 112 and is connected to one end of the cylinder head 12b along the crankshaft direction via the mounting flange 112. Figure 1 The mating surface S between the cylinder head 12b and the coolant passage 110 is shown. The exhaust gas recirculation device 140 is connected to the cylinder head 12b via a bracket 120a. The catalytic converter 120 is connected to the internal combustion engine body 12; the exhaust gas generated by the internal combustion engine body 12 is purified by the catalytic converter 120 before being discharged. The filler neck 130 is located on the cylinder head cover 12c and near the coolant passage 110.

[0053] The exhaust gas recirculation (EGR) device 140 includes an exhaust system component 142, which is, for example, a water-cooled EGR cooler located below the filler neck 130. The EGR component 142 is connected to a catalytic converter 120. Specifically, the catalytic converter 120 is connected to the exhaust system component 142 via a return gas passage 122, and an EGR gas passage 150 is connected to the downstream end of the exhaust system component 142. A portion of the exhaust gas generated by the internal combustion engine 12 flows sequentially from the catalytic converter 120 through the return gas passage 122, the exhaust system component 142, and the EGR gas passage 150 into the intake manifold, and then is delivered to the combustion chamber. The internal combustion engine 12 supplies coolant to the exhaust system component 142, where the coolant undergoes heat exchange and is heated before returning to the internal combustion engine 12.

[0054] Figure 3 yes Figure 1 This is a schematic diagram of the cooling water circuit for some components of an internal combustion engine. Please refer to it. Figure 3 In detail, the flow path structure 100 of this embodiment also includes a thermostat 170, a heater 180, a pump 190, and a radiator 105. The coolant passage 110 is connected to the cylinder 12a (marked in...) within the internal combustion engine body 12. Figure 1The water jackets 52a and 54a of cylinder banks 52 and 54 are connected. Driven by pump 190, the coolant CW is heated by heat exchange in cylinder banks 52 and 54, flows through coolant passage 110 to radiator 105, is cooled by heat exchange in radiator 105, and then flows through thermostat 170 back to cylinder banks 52 and 54. A portion of the coolant flows from cylinder bank 54 to exhaust system component 142 of exhaust gas recirculation device 140 for heat exchange, and then returns to cylinder banks 52 and 54. A portion of the coolant flows from cylinder bank 54 to heater 180 for heating, and then returns to cylinder banks 52 and 54.

[0055] The detailed arrangement, connection and operation of the catalytic device 120, exhaust gas recirculation device 140, thermostat 170, heater 180, pump 190 and radiator 105 are existing technologies in the field of internal combustion engines and will not be elaborated here.

[0056] Please refer to Figure 2 The coolant passage 110 is connected, for example, to the connection terminals E1 and E2 respectively. Figure 3 Cylinder blocks 52 and 54, coolant passage 110, for example, is connected to, via connector E3,... Figure 3 The radiator 105 and the coolant passage 110 are connected, for example, via connectors E4 and E5. Figure 3 The heater 180. The coolant passage 110 is connected, for example, via the connector E6. Figure 3 Pump 190 is shown. A portion of the exhaust gas flows through the connection terminal E7 to the intake manifold and is then delivered to the combustion chamber. The specific piping connections between the coolant passage 110 and the cylinder bank 52, cylinder bank 54, radiator 105, and heater 180 are existing technologies in the field of internal combustion engines and will not be described in detail here.

[0057] Figure 4 yes Figure 2 A side view of the flow path structure. Figure 5 Show Figure 1 The partial structure of an internal combustion engine. Please refer to... Figure 2 , Figure 4 and Figure 5 In this embodiment, the coolant passage 110 also has an extending flange 114 and an oil guide wall 116. The extending flange 114 extends laterally along the internal combustion engine body 12, and the oil guide wall 116 is as follows: Figure 4 It is integrally connected to the extension flange 114 as shown. In this embodiment, the oil guide wall 116 is, for example, a straight rib, but the present invention is not limited thereto.

[0058] Figure 6 Show Figure 1 The partial structure of an internal combustion engine. Please refer to... Figure 5 and Figure 6The extended flange 114 has opposing front faces 114a and back faces 114b, and an oil guide wall 116 is formed on the back face 114b of the extended flange 114. Figure 5 and Figure 6 As can be seen, the oil guide wall 116 on the extended flange 114 is located between the filler neck 130 and the exhaust system component 142 in the vertical direction (axial Z) of the internal combustion engine body 12. The oil guide wall 116 is adapted to guide the engine oil dripping from the filler neck 130 along direction D (shown in the figure). Figure 5 ) Guided to the main body of the internal combustion engine 12.

[0059] As described above, in the internal combustion engine 10 of this embodiment, the coolant passage 110 is formed with an extending flange 114 and an oil guide wall 116 integrally formed on the extending flange 114, for guiding the engine oil dripping from the filler neck 130 to the internal combustion engine body 12 instead of falling onto the exhaust system component 142. Accordingly, it is not necessary to provide an additional independent oil baffle or other independent oil guide component for guiding the engine oil. Thus, the internal combustion engine of this embodiment prevents oil from adhering to the exhaust system component 142 through a simple structure, thereby reducing the installation cost and structural complexity of the internal combustion engine 10.

[0060] Furthermore, in this embodiment, when viewed from above the internal combustion engine 10, the width W of the exhaust system component 142 (indicated by...) Figure 5 The length L (indicated in) is less than 116 of the oil guide wall. Figure 5 Accordingly, the oil guide wall 116 can reliably collect the falling oil above the exhaust system component 142, preventing oil from falling onto the exhaust system component 142.

[0061] In this embodiment, the internal combustion engine body 12 is as follows: Figure 6 As shown, it is inclined along axis A1 toward exhaust system component 142, and by Figure 5 and Figure 6 As can be seen, the oil guide wall 116 slopes downwards along axis A2 toward the internal combustion engine body 12. Furthermore, when viewed laterally along the internal combustion engine 10, the exhaust gas recirculation cooler (exhaust system component 142) is closer to the internal combustion engine body 12 in the width direction (axial Y) than the filler neck 130. This arrangement allows the oil guide wall 116 to reliably collect oil dripping from the filler neck 130 and reliably guide the oil to the internal combustion engine body 12.

[0062] In summary, in the internal combustion engine of this invention, the coolant passage is formed with an extending flange and an oil guide wall integrally formed on the extending flange, which guides the engine oil dripping from the filler neck to the main body of the internal combustion engine and prevents it from falling onto the exhaust system components. Therefore, there is no need to install a separate oil baffle or other separate oil guide components for guiding the oil. Thus, the internal combustion engine of this invention prevents oil from adhering to the exhaust system components through a simple structure, thereby reducing the installation cost and structural complexity of the internal combustion engine.

[0063] 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 internal combustion engine, characterized in that, include: An internal combustion engine body includes a cylinder, a cylinder head, and a cylinder head cover, wherein the cylinder head is disposed on the cylinder and the cylinder head cover covers the cylinder head; A coolant passage having a mounting flange and connected to the cylinder head via the mounting flange; The fuel filler cap is located on the cylinder head cover; as well as An exhaust system component is located below the filler neck; The coolant passage also has an extending flange and an oil guide wall, the extending flange extending laterally along the main body of the internal combustion engine, and the oil guide wall integrally formed and connected to the extending flange. The oil guide wall is located between the filler neck and the exhaust system component, and is adapted to guide the engine oil dripping from the filler neck to the internal combustion engine body.

2. The internal combustion engine according to claim 1, characterized in that, When viewed from above the internal combustion engine, the width of the exhaust system component is less than the length of the oil guide wall.

3. The internal combustion engine according to claim 2, characterized in that, The main body of the internal combustion engine is inclined toward the exhaust system component.

4. The internal combustion engine according to claim 3, characterized in that, The oil guide wall slopes downwards toward the main body of the internal combustion engine.

5. The internal combustion engine according to any one of claims 1 to 4, characterized in that, The exhaust system component is a water-cooled exhaust gas recirculation cooler.

6. The internal combustion engine according to claim 5, characterized in that, When viewed from the side of the internal combustion engine, the exhaust gas recirculation cooler is closer to the engine body than the fuel filler neck.

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